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sneak/mfer:main sneak/mfer:issue-178-gen-output sneak/mfer:next sneak/mfer:issue-116-gomodguard
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sneak/mfer:issue-178-gen-output sneak/mfer:next sneak/mfer:issue-116-gomodguard sneak/mfer:main
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Author SHA1 Message Date
sneak c5df0e3139 Record file mode in the manifest, 0000 unless asked (closes #161)
check / check (push) Failing after 6s
Details 
MFFilePath gains mode (field 304): a file's permission bits, 0777 at
most, or 0000, meaning none recorded. gen and freshen record real modes
only with --include-permissions (ScannerOptions.IncludePermissions); the
builder keeps only mode.Perm(), so setuid, setgid and sticky are never
written. list -l and export show the mode in octal. check reports
MODE_MISMATCH for a recorded mode other than 0000 the file lacks. fetch
refuses a manifest with a mode above 0777 before requesting any file,
sets only the permission bits of each recorded mode on the files it
writes, and downloads again a present file whose mode differs. The decoding-cost bound counts a file
entry at 176 bytes, up from 160.

Model: opus-5-5
 2026-10-06 06:27:56 +00:00
37 changed files with 920 additions and 1450 deletions
Expand all files Collapse all files
Dockerfile
+5 -17
View File
@@ -11,8 +11,8 @@ RUN golangci-lint run --config .golangci.yml ./...
# Test phase. -race needs cgo and so a C compiler, which the Debian Go # Test phase. -race needs cgo and so a C compiler, which the Debian Go
# image ships and the alpine one does not. # image ships and the alpine one does not.
# golang:1.27.1, 2026-10-06 # golang:1.23.12, 2026-03-14
FROM golang@sha256:1e93e00a31255c07e9a34c4207f3006e1501730c5323697cee7dfb827fdae44c AS test FROM golang@sha256:60deed95d3888cc5e4d9ff8a10c54e5edc008c6ae3fba6187be6fb592e19e8c0 AS test
WORKDIR /src WORKDIR /src
COPY go.mod go.sum ./ COPY go.mod go.sum ./
RUN go mod download RUN go mod download
@@ -21,24 +21,12 @@ RUN go test -timeout 90s -race -cover ./... || \
{ echo "--- Rerunning with -v for details ---"; \ { echo "--- Rerunning with -v for details ---"; \
go test -timeout 90s -race -v ./...; exit 1; } go test -timeout 90s -race -v ./...; exit 1; }
# Vulnerability check, built only by script/vulncheck (make vulncheck). # Build stage. Nothing is wanted from either phase above; the copies
# No stage depends on it, so the image build does not run it.
# golang:1.27.1, 2026-10-06
FROM golang@sha256:1e93e00a31255c07e9a34c4207f3006e1501730c5323697cee7dfb827fdae44c AS vulncheck
# govulncheck v1.8.0, 2026-10-06
RUN go install golang.org/x/vuln/cmd/govulncheck@709015412431dd2b5b28a53c06c70bc02d49074c
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN govulncheck ./...
# Build stage. Nothing is wanted from the lint or test phase; the copies
# are what make BuildKit build them first, so this stage cannot run # are what make BuildKit build them first, so this stage cannot run
# unless lint and test passed. The Debian Go image ships git, which the # unless lint and test passed. The Debian Go image ships git, which the
# version step below needs. # version step below needs.
# golang:1.27.1, 2026-10-06 # golang:1.23.12, 2026-03-14
FROM golang@sha256:1e93e00a31255c07e9a34c4207f3006e1501730c5323697cee7dfb827fdae44c AS builder FROM golang@sha256:60deed95d3888cc5e4d9ff8a10c54e5edc008c6ae3fba6187be6fb592e19e8c0 AS builder
COPY --from=lint /src/go.sum /dev/null COPY --from=lint /src/go.sum /dev/null
COPY --from=test /src/go.sum /dev/null COPY --from=test /src/go.sum /dev/null
# A tar-stream context keeps the sender's file owners, which git refuses. # A tar-stream context keeps the sender's file owners, which git refuses.
Makefile
+1 -4
View File
@@ -1,4 +1,4 @@
.PHONY: bootstrap setup test lint fmt fmt-check check docker hooks build generate fuzz vulncheck .PHONY: bootstrap setup test lint fmt fmt-check check docker hooks build generate fuzz
# Makefile targets are thin shims; the implementations live in script/ # Makefile targets are thin shims; the implementations live in script/
# per the scripts-to-rule-them-all pattern (see the Entrypoints section # per the scripts-to-rule-them-all pattern (see the Entrypoints section
@@ -39,6 +39,3 @@ generate:
fuzz: fuzz:
@script/fuzz @script/fuzz
vulncheck:
@script/vulncheck
README.md
+4 -21
View File
@@ -9,9 +9,8 @@ downloading, streaming, and mirroring. It was first published in 2022. The
manifest files' data is serialized with Google's manifest files' data is serialized with Google's
[protobuf serialization format](https://developers.google.com/protocol-buffers). [protobuf serialization format](https://developers.google.com/protocol-buffers).
The structure of these files can be found The structure of these files can be found
[in the format specification](docs/FORMAT.md), which refers to the protobuf [in the format specification](https://git.eeqj.de/sneak/mfer/src/branch/main/mfer/mf.proto)
schema `mfer/mf.proto` for exact field numbers and types. Both are included in which is included in the [project repository](https://git.eeqj.de/sneak/mfer).
the [project repository](https://git.eeqj.de/sneak/mfer).
The current version is pre-1.0 and while the repo was published in 2022, there The current version is pre-1.0 and while the repo was published in 2022, there
has not yet been any versioned release. [SemVer](https://semver.org) will be has not yet been any versioned release. [SemVer](https://semver.org) will be
@@ -24,7 +23,7 @@ javascript library is planned.
# Getting Started # Getting Started
`mfer` builds from source with Go 1.27.1 or later. The generated protobuf code `mfer` builds from source with a Go 1.23+ toolchain. The generated protobuf code
is committed, so no `protoc` toolchain is required: is committed, so no `protoc` toolchain is required:
```sh ```sh
@@ -71,7 +70,7 @@ provide:
- `script/bootstrap` — install all dependencies, idempotently: Go and the - `script/bootstrap` — install all dependencies, idempotently: Go and the
modules of `go.mod`; node (the version `.nvmrc` names, through nvm when there modules of `go.mod`; node (the version `.nvmrc` names, through nvm when there
is no node on `PATH`) and yarn, plus the prettier version pinned in is no node on `PATH`) and yarn, plus the prettier version pinned in
`package.json`/`yarn.lock`; `gofumpt` v0.12.0 and `protoc-gen-go` v1.36.12, `package.json`/`yarn.lock`; `gofumpt` v0.12.0 and `protoc-gen-go` v1.36.11,
installed into `bin/` with `go install`, each pinned to a commit; and `protoc` installed into `bin/` with `go install`, each pinned to a commit; and `protoc`
33.4, unpacked into `bin/protoc` from its release archive once the archive 33.4, unpacked into `bin/protoc` from its release archive once the archive
matches the sha256 the script holds for this platform. Each of those three is matches the sha256 the script holds for this platform. Each of those three is
@@ -99,11 +98,6 @@ provide:
as ordinary tests as ordinary tests
- `script/lint` — run `golangci-lint` in Docker: builds only the `lint` stage of - `script/lint` — run `golangci-lint` in Docker: builds only the `lint` stage of
the `Dockerfile`, whose build runs the linter, uncached so it runs every time the `Dockerfile`, whose build runs the linter, uncached so it runs every time
- `script/vulncheck` (`make vulncheck`) — run `govulncheck` in Docker: builds
only the `vulncheck` stage of the `Dockerfile`, uncached, which reports known
vulnerabilities in the code `mfer` calls, from the Go vulnerability database.
`script/check` does not run it, so an advisory published later never turns the
gate red
- `script/fmt` — format all code and docs (writes): `script/gofumpt --write` and - `script/fmt` — format all code and docs (writes): `script/gofumpt --write` and
`script/prettier --write` `script/prettier --write`
- `script/gofumpt` — run `gofumpt` over every Go file in the repository in the - `script/gofumpt` — run `gofumpt` over every Go file in the repository in the
@@ -273,20 +267,9 @@ are now tracked only in the [issues](https://git.eeqj.de/sneak/mfer/issues).
- verifies checksums of all files in manifest, displaying error and exiting - verifies checksums of all files in manifest, displaying error and exiting
nonzero if any files are missing or corrupted, or have permission bits nonzero if any files are missing or corrupted, or have permission bits
other than the mode the manifest records, unless that is `0000` other than the mode the manifest records, unless that is `0000`
- looks for those files under the base directory: the one `--base` names, or
else the directory holding the manifest, or the current directory for a
manifest given by URL. So `mfer check /media/drive` checks a drive against
the `index.mf` at its root, from any directory
- warns about each file under the base directory that the manifest does not - warns about each file under the base directory that the manifest does not
list, hidden files included; with `--no-extra-files` each one is a failure list, hidden files included; with `--no-extra-files` each one is a failure
instead instead
- `mfer freshen` / `mfer freshen .`
- rewrites `index.mf` to list the files now under the directory holding it,
or under the one `--base` names, hashing only the files that are new or
changed
- leaves out hidden files unless given `--include-dotfiles`, and symlinks
unless given `--follow-symlinks`, which lists each symlink to a file under
its own name with the contents of the file it points to
- `mfer fetch https://example.com/stuff/` - `mfer fetch https://example.com/stuff/`
- fetches `/stuff/index.mf` and downloads all files listed in manifest into - fetches `/stuff/index.mf` and downloads all files listed in manifest into
the current directory, or the one given with `--dest`, and assures the current directory, or the one given with `--dest`, and assures
docs/FORMAT.md
+5 -20
View File
@@ -37,7 +37,7 @@ The outer message contains:
| `uuid` | 105 | bytes | Random v4 UUID; must match the inner message UUID | | `uuid` | 105 | bytes | Random v4 UUID; must match the inner message UUID |
| `innerMessage` | 199 | bytes | Zstd-compressed serialized `MFFile` message | | `innerMessage` | 199 | bytes | Zstd-compressed serialized `MFFile` message |
| `signature` | 201 | bytes (optional) | GPG signature (ASCII-armored or binary) | | `signature` | 201 | bytes (optional) | GPG signature (ASCII-armored or binary) |
| `signer` | 202 | bytes (optional) | Fingerprint of the signing key | | `signer` | 202 | bytes (optional) | Full GPG key ID of the signer |
| `signingPubKey` | 203 | bytes (optional) | Full GPG signing public key | | `signingPubKey` | 203 | bytes (optional) | Full GPG signing public key |
### SHA-256 Hash ### SHA-256 Hash
@@ -50,14 +50,11 @@ allows verifying data integrity before decompression.
The `innerMessage` field is compressed with The `innerMessage` field is compressed with
[Zstandard (zstd)](https://facebook.github.io/zstd/). Implementations must [Zstandard (zstd)](https://facebook.github.io/zstd/). Implementations must
enforce a decompression size limit to prevent decompression bombs. The reference enforce a decompression size limit to prevent decompression bombs. The reference
implementation limits decompressed size to 256 MiB. It writes zstd frames with a implementation limits decompressed size to 256 MB. It writes zstd frames with a
window of at most 8 MiB, the largest window the zstd format recommends decoders window of at most 8 MiB, the largest window the zstd format recommends decoders
support, and refuses frames that ask for a larger one. It also refuses an inner support, and refuses frames that ask for a larger one. It also refuses an inner
message whose file entries, hashes, timestamps and MIME types, counted at 176, message whose file entries, hashes, timestamps and MIME types, counted at 176,
112, 64 and 16 bytes each, add up to more than 8 times its size. It refuses a 112, 64 and 16 bytes each, add up to more than 8 times its size.
manifest file larger than 258 MiB without reading the rest of it: zstd's worst
case grows a 256 MiB inner message by 1/256 to 257 MiB, and the last MiB is room
for the signature, the signing key and the other outer fields.
## Inner Message (`MFFile`) ## Inner Message (`MFFile`)
@@ -109,12 +106,9 @@ All `path` values must satisfy these invariants:
- **No parent traversal**: no `..` path segments - **No parent traversal**: no `..` path segments
- **No empty segments**: no `//` sequences - **No empty segments**: no `//` sequences
- **No trailing slash**: paths refer to files, not directories - **No trailing slash**: paths refer to files, not directories
- **Listed once**: each path appears at most once in a manifest, compared byte
for byte, so `A.txt` and `a.txt` are two paths
Implementations must validate these invariants when reading and writing Implementations must validate these invariants when reading and writing
manifests. Paths that violate these rules must be rejected, and a reader must manifests. Paths that violate these rules must be rejected.
reject a manifest that lists a path more than once.
## Hash Format (`MFFileChecksum`) ## Hash Format (`MFFileChecksum`)
@@ -143,16 +137,7 @@ Where:
compressed data) compressed data)
Components are separated by hyphens. The signature is produced by GPG over this Components are separated by hyphens. The signature is produced by GPG over this
canonical string and stored in the `signature` field of the outer message. The canonical string and stored in the `signature` field of the outer message.
signing key's public key goes in `signingPubKey` and its fingerprint, in hex, in
`signer`.
A verifier accepts a signed manifest only if `signingPubKey` holds exactly one
primary key, `signature` is one good signature over the canonical string made by
that key (or one of its subkeys), and `signer` is that key's fingerprint. The
reference implementation refuses to load a manifest that fails these checks;
`check` and `fetch` given `--require-signature` then compare the required
fingerprint with `signer`.
## Deterministic Serialization ## Deterministic Serialization
go.mod
+15 -14
View File
@@ -1,28 +1,29 @@
module sneak.berlin/go/mfer module sneak.berlin/go/mfer
go 1.27.1 go 1.23
require ( require (
github.com/davecgh/go-spew v1.1.1 github.com/davecgh/go-spew v1.1.1
github.com/dustin/go-humanize v1.1.0 github.com/dustin/go-humanize v1.0.1
github.com/klauspost/compress v1.20.1 github.com/google/uuid v1.1.2
github.com/klauspost/compress v1.18.2
github.com/multiformats/go-multihash v0.2.3 github.com/multiformats/go-multihash v0.2.3
github.com/spf13/afero v1.15.0 github.com/spf13/afero v1.8.0
github.com/stretchr/testify v1.12.1 github.com/stretchr/testify v1.12.1
github.com/urfave/cli/v3 v3.14.0 github.com/urfave/cli/v3 v3.14.0
golang.org/x/term v0.46.0 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211
google.golang.org/protobuf v1.36.12 google.golang.org/protobuf v1.28.1
) )
require ( require (
github.com/klauspost/cpuid/v2 v2.4.0 // indirect github.com/klauspost/cpuid/v2 v2.0.9 // indirect
github.com/minio/sha256-simd v1.0.1 // indirect github.com/minio/sha256-simd v1.0.0 // indirect
github.com/mr-tron/base58 v1.3.0 // indirect github.com/mr-tron/base58 v1.2.0 // indirect
github.com/multiformats/go-varint v0.1.0 // indirect github.com/multiformats/go-varint v0.0.6 // indirect
github.com/spaolacci/murmur3 v1.1.0 // indirect github.com/spaolacci/murmur3 v1.1.0 // indirect
go.yaml.in/yaml/v3 v3.0.5 // indirect go.yaml.in/yaml/v3 v3.0.5 // indirect
golang.org/x/crypto v0.57.0 // indirect golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e // indirect
golang.org/x/sys v0.48.0 // indirect golang.org/x/sys v0.1.0 // indirect
golang.org/x/text v0.42.0 // indirect golang.org/x/text v0.3.6 // indirect
lukechampine.com/blake3 v1.4.1 // indirect lukechampine.com/blake3 v1.1.6 // indirect
) )
go.sum
+463 -28
View File
@@ -1,40 +1,475 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.44.3/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
cloud.google.com/go v0.75.0/go.mod h1:VGuuCn7PG0dwsd5XPVm2Mm3wlh3EL55/79EKB6hlPTY=
cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3fOKtUw0Xmo=
dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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google.golang.org/api v0.15.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
google.golang.org/api v0.17.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.18.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.19.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.22.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
google.golang.org/api v0.35.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
google.golang.org/api v0.36.0/go.mod h1:+z5ficQTmoYpPn8LCUNVpK5I7hwkpjbcgqA7I34qYtE=
google.golang.org/api v0.40.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjRCQ8=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
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google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20191115194625-c23dd37a84c9/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20191216164720-4f79533eabd1/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20191230161307-f3c370f40bfb/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200115191322-ca5a22157cba/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200122232147-0452cf42e150/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200204135345-fa8e72b47b90/go.mod h1:GmwEX6Z4W5gMy59cAlVYjN9JhxgbQH6Gn+gFDQe2lzA=
google.golang.org/genproto v0.0.0-20200212174721-66ed5ce911ce/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200228133532-8c2c7df3a383/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200305110556-506484158171/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20201109203340-2640f1f9cdfb/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20201201144952-b05cb90ed32e/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20201210142538-e3217bee35cc/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20201214200347-8c77b98c765d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20210108203827-ffc7fda8c3d7/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20210226172003-ab064af71705/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
google.golang.org/grpc v1.34.0/go.mod h1:WotjhfgOW/POjDeRt8vscBtXq+2VjORFy659qA51WJ8=
google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
lukechampine.com/blake3 v1.1.6 h1:H3cROdztr7RCfoaTpGZFQsrqvweFLrqS73j7L7cmR5c=
lukechampine.com/blake3 v1.1.6/go.mod h1:tkKEOtDkNtklkXtLNEOGNq5tcV90tJiA1vAA12R78LA=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
internal/cli/check.go
+29 -32
View File
@@ -108,33 +108,28 @@ func (mfa *CLIApp) fetchManifestToTemp(
if tmpErr != nil { if tmpErr != nil {
_ = rc.Close() _ = rc.Close()
return "", tmpErr return "", fmt.Errorf("failed to create temp file: %w", tmpErr)
} }
tmpPath := tmpFile.Name() tmpPath := tmpFile.Name()
_, cpErr := io.Copy(tmpFile, rc)
// Copying stops one byte past mfa.maxManifestSize, which is enough to
// tell that the manifest is too large.
written, cpErr := io.Copy(tmpFile, io.LimitReader(rc, mfa.maxManifestSize+1))
_ = rc.Close() _ = rc.Close()
_ = tmpFile.Close() _ = tmpFile.Close()
if cpErr == nil && written > mfa.maxManifestSize {
cpErr = fmt.Errorf("%w of %d bytes", errManifestTooLarge, mfa.maxManifestSize)
}
if cpErr != nil { if cpErr != nil {
_ = mfa.Fs.Remove(tmpPath) _ = mfa.Fs.Remove(tmpPath)
return "", fmt.Errorf("download manifest: %w", cpErr) return "", fmt.Errorf("failed to download manifest: %w", cpErr)
} }
return tmpPath, nil return tmpPath, nil
} }
// verifyRequiredSigner enforces the --require-signature fingerprint // verifyRequiredSigner enforces the --require-signature fingerprint
// against the key that made the manifest's signature. // against the manifest's embedded signing key.
func verifyRequiredSigner(chk *mfer.Checker, requiredSigner string) error { func verifyRequiredSigner(
ctx context.Context, chk *mfer.Checker, requiredSigner string,
) error {
// Validate fingerprint format: must be exactly 40 hex characters // Validate fingerprint format: must be exactly 40 hex characters
if len(requiredSigner) != fingerprintHexLen { if len(requiredSigner) != fingerprintHexLen {
return fmt.Errorf("%w, got %d", errInvalidFingerprint, len(requiredSigner)) return fmt.Errorf("%w, got %d", errInvalidFingerprint, len(requiredSigner))
@@ -142,7 +137,7 @@ func verifyRequiredSigner(chk *mfer.Checker, requiredSigner string) error {
_, err := hex.DecodeString(requiredSigner) _, err := hex.DecodeString(requiredSigner)
if err != nil { if err != nil {
return fmt.Errorf("invalid fingerprint: %w", err) return fmt.Errorf("invalid fingerprint: must be valid hex: %w", err)
} }
if !chk.IsSigned() { if !chk.IsSigned() {
@@ -150,17 +145,22 @@ func verifyRequiredSigner(chk *mfer.Checker, requiredSigner string) error {
errManifestNotSigned, requiredSigner) errManifestNotSigned, requiredSigner)
} }
// Loading the manifest checked that the signer is the fingerprint of // Extract fingerprint from the embedded public key (not from the
// the key that made the signature. // signer field). This validates the key is importable and gets its
signer := string(chk.Signer()) // actual fingerprint.
embeddedFP, err := chk.ExtractEmbeddedSigningKeyFP(ctx)
// Compare fingerprints - must be exact match (case-insensitive) if err != nil {
if !strings.EqualFold(signer, requiredSigner) { return fmt.Errorf(
return fmt.Errorf("embedded signing key fingerprint %s %w %s", "failed to extract fingerprint from embedded signing key: %w", err)
signer, errSignerMismatch, requiredSigner)
} }
log.Infof("manifest signature verified (signer: %s)", signer) // Compare fingerprints - must be exact match (case-insensitive)
if !strings.EqualFold(embeddedFP, requiredSigner) {
return fmt.Errorf("embedded signing key fingerprint %s %w %s",
embeddedFP, errSignerMismatch, requiredSigner)
}
log.Infof("manifest signature verified (signer: %s)", embeddedFP)
return nil return nil
} }
@@ -232,7 +232,7 @@ func findExtraFiles(
err := chk.FindExtraFiles(ctx, extraResults) err := chk.FindExtraFiles(ctx, extraResults)
if err != nil { if err != nil {
return fmt.Errorf("find extra files: %w", err) return fmt.Errorf("failed to check for extra files: %w", err)
} }
<-extraDone <-extraDone
@@ -275,7 +275,7 @@ func runCheck(
progressWg.Wait() progressWg.Wait()
if err != nil { if err != nil {
return 0, fmt.Errorf("check files: %w", err) return 0, fmt.Errorf("check failed: %w", err)
} }
// Wait for results processing to complete // Wait for results processing to complete
@@ -296,18 +296,14 @@ func (mfa *CLIApp) checkManifestOperation(
manifestPath, err := mfa.resolveManifestArg(cmd) manifestPath, err := mfa.resolveManifestArg(cmd)
if err != nil { if err != nil {
return err return fmt.Errorf("check: %w", err)
} }
// Done before a URL is swapped for the temp file it is downloaded to,
// whose directory is not the base.
basePath := resolveBasePath(cmd, manifestPath)
// URL manifests need to be downloaded to a temp file for the checker // URL manifests need to be downloaded to a temp file for the checker
if isHTTPURL(manifestPath) { if isHTTPURL(manifestPath) {
tmpPath, tmpErr := mfa.fetchManifestToTemp(ctx, manifestPath) tmpPath, tmpErr := mfa.fetchManifestToTemp(ctx, manifestPath)
if tmpErr != nil { if tmpErr != nil {
return tmpErr return fmt.Errorf("check: %w", tmpErr)
} }
defer func() { _ = mfa.Fs.Remove(tmpPath) }() defer func() { _ = mfa.Fs.Remove(tmpPath) }()
@@ -315,6 +311,7 @@ func (mfa *CLIApp) checkManifestOperation(
manifestPath = tmpPath manifestPath = tmpPath
} }
basePath := cmd.String("base")
showProgress := cmd.Bool("progress") showProgress := cmd.Bool("progress")
log.Infof("checking manifest %s with base %s", manifestPath, basePath) log.Infof("checking manifest %s with base %s", manifestPath, basePath)
@@ -327,13 +324,13 @@ func (mfa *CLIApp) checkManifestOperation(
Fs: mfa.Fs, Fs: mfa.Fs,
}) })
if err != nil { if err != nil {
return fmt.Errorf("load manifest: %w", err) return fmt.Errorf("failed to load manifest: %w", err)
} }
// Check signature requirement // Check signature requirement
requiredSigner := cmd.String(flagRequireSignature) requiredSigner := cmd.String(flagRequireSignature)
if requiredSigner != "" { if requiredSigner != "" {
err = verifyRequiredSigner(chk, requiredSigner) err = verifyRequiredSigner(ctx, chk, requiredSigner)
if err != nil { if err != nil {
return err return err
} }
internal/cli/entry.go
-2
View File
@@ -5,7 +5,6 @@ import (
"os" "os"
"github.com/spf13/afero" "github.com/spf13/afero"
"sneak.berlin/go/mfer/mfer"
) )
// NoColor disables colored output when set. Automatically true if the // NoColor disables colored output when set. Automatically true if the
@@ -61,7 +60,6 @@ func RunWithOptions(opts *RunOptions) int {
version: opts.Version, version: opts.Version,
gitrev: opts.Gitrev, gitrev: opts.Gitrev,
exitCode: 0, exitCode: 0,
maxManifestSize: mfer.MaxManifestSize,
Stdin: opts.Stdin, Stdin: opts.Stdin,
Stdout: opts.Stdout, Stdout: opts.Stdout,
Stderr: opts.Stderr, Stderr: opts.Stderr,
internal/cli/entry_test.go
+1 -184
View File
@@ -8,7 +8,6 @@ import (
"fmt" "fmt"
"io" "io"
"math/rand" "math/rand"
"net/http/httptest"
"os" "os"
"path/filepath" "path/filepath"
"slices" "slices"
@@ -355,77 +354,6 @@ func TestGenerateCommand(t *testing.T) {
assert.True(t, exists) assert.True(t, exists)
} }
// TestGenerateRefusesTwoFilesAtOnePath runs gen on arguments whose files
// would share a path in the manifest: two directories that each hold a.txt,
// and one directory given twice. gen must fail while it lists the files,
// before it hashes any, naming the path, and write no manifest.
func TestGenerateRefusesTwoFilesAtOnePath(t *testing.T) {
t.Parallel()
for _, tc := range []struct {
name string
first, second string
}{
{"two directories", testDir, "/other"},
{"one directory twice", testDir, testDir},
} {
t.Run(tc.name, func(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
require.NoError(t, fs.MkdirAll(testDir, 0o755))
require.NoError(t, fs.MkdirAll("/other", 0o755))
writeTestFile(t, fs, "/testdir/a.txt", "first")
writeTestFile(t, fs, "/other/a.txt", "second")
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "-o", testOutput, tc.first, tc.second,
}, fs)
assert.Equal(t, 1, runCLI(opts))
assert.Contains(t, testStderr(t, opts),
`enumerate files: duplicate path "a.txt": `+
tc.first+"/a.txt and "+tc.second+"/a.txt")
exists, err := afero.Exists(fs, testOutput)
require.NoError(t, err)
assert.False(t, exists)
})
}
}
// TestGenerateSeededManifestBytes pins the exact bytes `gen --seed` writes
// for a fixed tree, so that a Go or dependency update that changes what
// mfer writes fails here. testdata/seeded.mf was written by an mfer built
// before such an update. The tree has enough files that zstd compresses
// the manifest instead of storing it as it is.
func TestGenerateSeededManifestBytes(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
start := time.Date(2025, 6, 1, 0, 0, 0, 0, time.UTC)
for i := range 200 {
path := fmt.Sprintf("/testdir/d%d/f%03d.txt", i%10, i)
mtime := start.Add(time.Duration(i) * time.Second)
require.NoError(t, fs.MkdirAll(filepath.Dir(path), 0o755))
writeTestFile(t, fs, path, fmt.Sprintf("file %d\n", i))
require.NoError(t, fs.Chtimes(path, mtime, mtime))
}
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "--seed", "mfer", "-o", testOutput, testDir,
}, fs)
require.Equal(t, 0, runCLI(opts), "stderr: %s", testStderr(t, opts))
got, err := afero.ReadFile(fs, testOutput)
require.NoError(t, err)
want, err := os.ReadFile("testdata/seeded.mf")
require.NoError(t, err)
assert.Equal(t, want, got)
}
func TestGenerateAndCheckCommand(t *testing.T) { func TestGenerateAndCheckCommand(t *testing.T) {
t.Parallel() t.Parallel()
@@ -482,7 +410,7 @@ func TestGenerateRecordsModeOnlyWhenAsked(t *testing.T) {
listed := map[string]string{} listed := map[string]string{}
out := strings.TrimSuffix(testStdout(t, opts), "\n") out := strings.TrimSuffix(testStdout(t, opts), "\n")
for line := range strings.SplitSeq(out, "\n") { for _, line := range strings.Split(out, "\n") {
fields := strings.Split(line, "\t") // mode, size, mtime, path fields := strings.Split(line, "\t") // mode, size, mtime, path
require.Len(t, fields, 4, line) require.Len(t, fields, 4, line)
listed[fields[3]] = fields[0] listed[fields[3]] = fields[0]
@@ -652,33 +580,6 @@ func runCheckAfterRewrite(t *testing.T, rewritten, msg string) {
assert.Equal(t, 1, exitCode, msg) assert.Equal(t, 1, exitCode, msg)
} }
// TestCheckRequireSignatureRefusesOtherSigningKey runs check
// --require-signature on a manifest signed by another key whose embedded
// public key block also holds the required key. check must refuse it. It
// needs gpg and is skipped without it, as the other signing tests are.
//
//nolint:paralleltest // signedManifest calls t.Setenv, which bars t.Parallel
func TestCheckRequireSignatureRefusesOtherSigningKey(t *testing.T) {
content := []byte("signed file")
manifest, required := manifestSignedByAnotherKey(t,
map[string][]byte{testFileTxt: content})
fs := afero.NewMemMapFs()
require.NoError(t, fs.MkdirAll(testDir, 0o755))
require.NoError(t, afero.WriteFile(fs,
filepath.Join(testDir, testFileTxt), content, 0o644))
require.NoError(t, afero.WriteFile(fs, testManifest, manifest, 0o644))
opts := testOpts([]string{
testApp, cmdCheck, "-q", testFlagBase, testDir,
"--" + flagRequireSignature, required, testManifest,
}, fs)
assert.Equal(t, 1, runCLI(opts))
assert.Contains(t, testStderr(t, opts),
"load manifest: "+
"embedded public key block must hold exactly one key, found 2")
}
func TestCheckCommandWithCorruptedFile(t *testing.T) { func TestCheckCommandWithCorruptedFile(t *testing.T) {
t.Parallel() t.Parallel()
@@ -980,90 +881,6 @@ func TestCheckNeverReportsManifest(t *testing.T) {
} }
} }
// The directory setupManifestInSubdir makes and the manifest it writes there,
// relative to the working directory it sets.
const (
testSubdir = "sub"
testSubdirManifest = testSubdir + "/" + defaultManifestName
)
// setupManifestInSubdir makes a temp dir holding file.txt and sub/b.txt,
// where sub/index.mf is the manifest gen writes for sub, and makes it the
// working directory, so a test calling it cannot run in parallel. It returns
// the temp dir.
func setupManifestInSubdir(t *testing.T) string {
t.Helper()
root := t.TempDir()
sub := filepath.Join(root, testSubdir)
fs := afero.NewOsFs()
require.NoError(t, fs.MkdirAll(sub, 0o750))
writeTestFile(t, fs, filepath.Join(root, testFileTxt), "not in the manifest")
writeTestFile(t, fs, filepath.Join(sub, "b.txt"), "in the manifest")
opts := testOpts([]string{
testApp, cmdGenerate, "-q", "-o", filepath.Join(sub, defaultManifestName), sub,
}, fs)
require.Equal(t, 0, runCLI(opts), "stderr: %s", testStderr(t, opts))
t.Chdir(root)
return root
}
// TestCheckResolvesEntriesAgainstManifestDirectory runs check from the
// directory above sub, on the manifest in sub. Without --base, the
// manifest's entries are looked for in sub, whether check is given the
// manifest or sub, and the files above sub are not reported. --base names
// the directory to look in instead, the current one included.
//
//nolint:paralleltest // changes the process-global working directory
func TestCheckResolvesEntriesAgainstManifestDirectory(t *testing.T) {
root := setupManifestInSubdir(t)
for _, tc := range []struct {
args []string
exitCode int
failure string // a line check must print, if any
}{
{[]string{testSubdir}, 0, ""},
{[]string{testSubdirManifest}, 0, ""},
{[]string{filepath.Join(root, testSubdir)}, 0, ""},
{[]string{testFlagBase, testSubdir, testSubdirManifest}, 0, ""},
{[]string{testFlagBase, ".", testSubdirManifest}, 1, "MISSING: b.txt"},
} {
t.Run(strings.Join(tc.args, " "), func(t *testing.T) {
opts := testOpts(slices.Concat(
[]string{testApp, cmdCheck, testFlagNoExtra}, tc.args,
), afero.NewOsFs())
assert.Equal(t, tc.exitCode, runCLI(opts), "stderr: %s", testStderr(t, opts))
assert.Contains(t, testStderr(t, opts), tc.failure)
})
}
}
// TestCheckURLManifestResolvesEntriesAgainstCurrentDirectory runs check on
// a manifest given by URL, from a directory holding the file it lists: the
// file is looked for there.
//
//nolint:paralleltest // changes the process-global working directory
func TestCheckURLManifestResolvesEntriesAgainstCurrentDirectory(t *testing.T) {
files := map[string][]byte{testFileTxt: []byte("hello")}
server := httptest.NewServer(fetchTestHandler(manifestOf(t, files), files))
defer server.Close()
cwd := chdirTemp(t)
require.NoError(t,
os.WriteFile(filepath.Join(cwd, testFileTxt), files[testFileTxt], 0o600))
opts := testOpts([]string{
testApp, cmdCheck, testFlagNoExtra, server.URL + "/" + defaultManifestName,
}, afero.NewOsFs())
assert.Equal(t, 0, runCLI(opts), "stderr: %s", testStderr(t, opts))
}
// unlistableDirFs is a filesystem on which one directory cannot be listed. // unlistableDirFs is a filesystem on which one directory cannot be listed.
type unlistableDirFs struct { type unlistableDirFs struct {
afero.Fs afero.Fs
internal/cli/errmsg_test.go
+16 -143
View File
@@ -9,14 +9,12 @@ import (
"os" "os"
"os/exec" "os/exec"
"path/filepath" "path/filepath"
"slices"
"testing" "testing"
"github.com/spf13/afero" "github.com/spf13/afero"
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require" "github.com/stretchr/testify/require"
urfcli "github.com/urfave/cli/v3" urfcli "github.com/urfave/cli/v3"
"google.golang.org/protobuf/proto"
"sneak.berlin/go/mfer/mfer" "sneak.berlin/go/mfer/mfer"
) )
@@ -88,7 +86,8 @@ func TestVerifyRequiredSignerMessages(t *testing.T) {
t.Run("invalid fingerprint length", func(t *testing.T) { t.Run("invalid fingerprint length", func(t *testing.T) {
t.Parallel() t.Parallel()
err := verifyRequiredSigner(unsignedChecker(t), "12345678") err := verifyRequiredSigner(context.Background(),
unsignedChecker(t), "12345678")
require.ErrorIs(t, err, errInvalidFingerprint) require.ErrorIs(t, err, errInvalidFingerprint)
assert.EqualError(t, err, assert.EqualError(t, err,
"invalid fingerprint: must be exactly 40 hex characters, got 8") "invalid fingerprint: must be exactly 40 hex characters, got 8")
@@ -97,7 +96,8 @@ func TestVerifyRequiredSignerMessages(t *testing.T) {
t.Run("manifest not signed", func(t *testing.T) { t.Run("manifest not signed", func(t *testing.T) {
t.Parallel() t.Parallel()
err := verifyRequiredSigner(unsignedChecker(t), msgFpA) err := verifyRequiredSigner(context.Background(),
unsignedChecker(t), msgFpA)
require.ErrorIs(t, err, errManifestNotSigned) require.ErrorIs(t, err, errManifestNotSigned)
assert.EqualError(t, err, assert.EqualError(t, err,
"manifest is not signed, but signature from "+msgFpA+" is required") "manifest is not signed, but signature from "+msgFpA+" is required")
@@ -105,21 +105,23 @@ func TestVerifyRequiredSignerMessages(t *testing.T) {
} }
// TestSignerMismatchMessage drives verifyRequiredSigner against a real signed // TestSignerMismatchMessage drives verifyRequiredSigner against a real signed
// manifest. The signing key's fingerprint is whatever the generated key // manifest. The embedded fingerprint is whatever the generated key produced,
// produced, so it is read back from the checker and substituted into the // so it is read back from the checker and substituted into the expected
// expected string; the required signer is a fixed value that cannot match // string; the required signer is a fixed value that cannot match it. Requires
// it. Requires gpg and is skipped where it is absent, as the other signing // gpg and is skipped where it is absent, as the other signing tests are.
// tests are.
// //
//nolint:paralleltest // signedManifest calls t.Setenv, which bars t.Parallel //nolint:paralleltest // signedManifest calls t.Setenv, which bars t.Parallel
func TestSignerMismatchMessage(t *testing.T) { func TestSignerMismatchMessage(t *testing.T) {
chk := signedChecker(t, chk := signedChecker(t,
signedManifest(t, map[string][]byte{"f.txt": []byte("signed file")})) signedManifest(t, map[string][]byte{"f.txt": []byte("signed file")}))
err := verifyRequiredSigner(chk, msgFpB) embeddedFP, err := chk.ExtractEmbeddedSigningKeyFP(context.Background())
require.NoError(t, err)
err = verifyRequiredSigner(context.Background(), chk, msgFpB)
require.ErrorIs(t, err, errSignerMismatch) require.ErrorIs(t, err, errSignerMismatch)
assert.EqualError(t, err, assert.EqualError(t, err,
"embedded signing key fingerprint "+string(chk.Signer())+ "embedded signing key fingerprint "+embeddedFP+
" does not match required "+msgFpB) " does not match required "+msgFpB)
} }
@@ -189,34 +191,6 @@ func signedChecker(t *testing.T, manifest []byte) *mfer.Checker {
return chk return chk
} }
// manifestSignedByAnotherKey returns a manifest of files and the
// fingerprint of a throwaway key, the required key, that did not sign it.
// The manifest is signed by a second throwaway key; its embedded public key
// block holds the required key followed by the second key, and its signer
// field names the required key.
func manifestSignedByAnotherKey(
t *testing.T, files map[string][]byte,
) ([]byte, string) {
t.Helper()
required := new(mfer.MFFileOuter)
require.NoError(t, proto.Unmarshal(
signedManifest(t, files)[len(mfer.MAGIC):], required))
outer := new(mfer.MFFileOuter)
require.NoError(t, proto.Unmarshal(
signedManifest(t, files)[len(mfer.MAGIC):], outer))
outer.SigningPubKey = slices.Concat(
required.GetSigningPubKey(), outer.GetSigningPubKey())
outer.Signer = required.GetSigner()
data, err := proto.Marshal(outer)
require.NoError(t, err)
return append([]byte(mfer.MAGIC), data...), string(required.GetSigner())
}
func TestPathDoesNotExistMessage(t *testing.T) { func TestPathDoesNotExistMessage(t *testing.T) {
t.Parallel() t.Parallel()
@@ -303,7 +277,7 @@ func TestManifestLoaderHTTPStatusMessage(t *testing.T) {
_, err := mfa.openManifestReader(context.Background(), server.URL+"/foo.mf") _, err := mfa.openManifestReader(context.Background(), server.URL+"/foo.mf")
require.ErrorIs(t, err, errHTTPStatus) require.ErrorIs(t, err, errHTTPStatus)
assert.EqualError(t, err, assert.EqualError(t, err,
"download manifest "+server.URL+"/foo.mf: unexpected HTTP status 404") "failed to fetch "+server.URL+"/foo.mf: HTTP 404")
} }
func TestFetchManifestHTTPStatusMessage(t *testing.T) { func TestFetchManifestHTTPStatusMessage(t *testing.T) {
@@ -325,7 +299,7 @@ func TestFetchManifestHTTPStatusMessage(t *testing.T) {
return cmd.Run(context.Background(), []string{cmdFetch, server.URL}) return cmd.Run(context.Background(), []string{cmdFetch, server.URL})
}) })
require.ErrorIs(t, err, errHTTPStatus) require.ErrorIs(t, err, errHTTPStatus)
assert.EqualError(t, err, "download manifest: unexpected HTTP status 404") assert.EqualError(t, err, "failed to fetch manifest: HTTP 404")
} }
func TestFetchFileHTTPStatusMessage(t *testing.T) { func TestFetchFileHTTPStatusMessage(t *testing.T) {
@@ -343,108 +317,7 @@ func TestFetchFileHTTPStatusMessage(t *testing.T) {
&mfer.MFFilePath{}, nil) &mfer.MFFilePath{}, nil)
}) })
require.ErrorIs(t, err, errHTTPStatus) require.ErrorIs(t, err, errHTTPStatus)
assert.EqualError(t, err, "unexpected HTTP status 500") assert.EqualError(t, err, "HTTP 500")
}
// TestCheckCorruptManifestMessage runs check on a file that is not a
// manifest.
func TestCheckCorruptManifestMessage(t *testing.T) {
t.Parallel()
fs := afero.NewMemMapFs()
require.NoError(t, afero.WriteFile(fs, "/bad.mf", []byte("not a manifest"), 0o644))
mfa := &CLIApp{Fs: fs}
cmd := mfa.checkCommand()
cmd.Action = mfa.checkManifestOperation
// checkManifestOperation logs to the process-global logger.
err := runLocked(func() error {
return cmd.Run(context.Background(), []string{cmdCheck, "/bad.mf"})
})
assert.EqualError(t, err, "load manifest: invalid file format")
}
// TestListMissingManifestMessage runs list on a manifest file that does not
// exist.
func TestListMissingManifestMessage(t *testing.T) {
t.Parallel()
mfa := &CLIApp{Fs: afero.NewMemMapFs()}
cmd := mfa.listCommand()
// listManifestOperation sets the process-global log level.
err := runLocked(func() error {
return cmd.Run(context.Background(), []string{cmdList, "/nope.mf"})
})
require.ErrorIs(t, err, os.ErrNotExist)
assert.EqualError(t, err, "open /nope.mf: file does not exist")
}
// TestFetchHashMismatchMessage runs fetch against a server that sends a
// listed file with other content of the same size.
func TestFetchHashMismatchMessage(t *testing.T) {
t.Parallel()
manifest := builtManifest(t, map[string][]byte{testFileTxt: []byte("listed")})
server := httptest.NewServer(fetchTestHandler(manifest,
map[string][]byte{testFileTxt: []byte("served")}))
defer server.Close()
mfa := &CLIApp{Fs: afero.NewMemMapFs(), maxManifestSize: mfer.MaxManifestSize}
cmd := mfa.fetchCommand()
cmd.Action = mfa.fetchManifestOperation
// fetchManifestOperation logs to the process-global logger.
err := runLocked(func() error {
return cmd.Run(context.Background(),
[]string{cmdFetch, "--" + flagDest, t.TempDir(), server.URL})
})
require.ErrorIs(t, err, errHashMismatch)
assert.EqualError(t, err, "download "+testFileTxt+": hash mismatch")
}
// TestFreshenBackslashPathMessage runs freshen on a tree that has gained a
// file whose name holds a backslash, which a manifest path may not contain.
func TestFreshenBackslashPathMessage(t *testing.T) {
t.Parallel()
fs := afero.NewOsFs()
root, manifestPath := setupFreshenDir(t, fs,
map[string]string{testFileTxt: "content"})
writeTestFile(t, fs, filepath.Join(root, `a\b.txt`), "new")
mfa := &CLIApp{Fs: fs}
cmd := mfa.freshenCommand()
cmd.Action = mfa.freshenManifestOperation
// freshenManifestOperation logs to the process-global logger.
err := runLocked(func() error {
return cmd.Run(context.Background(),
[]string{cmdFreshen, testFlagBase, root, manifestPath})
})
assert.EqualError(t, err,
`path "a\\b.txt" contains backslash; use forward slashes only`)
}
// TestFreshenReadErrorMessage has freshen hash a directory as though it
// were a file, so reading it fails.
func TestFreshenReadErrorMessage(t *testing.T) {
t.Parallel()
root := t.TempDir()
require.NoError(t, os.Mkdir(filepath.Join(root, "sub"), 0o750))
hasher := &freshenHasher{
fs: afero.NewOsFs(),
absBase: root,
builder: mfer.NewBuilder(),
}
err := hasher.processEntry(&freshenEntry{path: "sub", needsHash: true})
assert.EqualError(t, err,
"read "+filepath.Join(root, "sub")+": is a directory")
} }
func TestURLRequiredMessage(t *testing.T) { func TestURLRequiredMessage(t *testing.T) {
internal/cli/export.go
+4 -4
View File
@@ -26,12 +26,12 @@ func (mfa *CLIApp) exportManifestOperation(
) error { ) error {
pathOrURL, err := mfa.resolveManifestArg(cmd) pathOrURL, err := mfa.resolveManifestArg(cmd)
if err != nil { if err != nil {
return err return fmt.Errorf("export: %w", err)
} }
rc, err := mfa.openManifestReader(ctx, pathOrURL) rc, err := mfa.openManifestReader(ctx, pathOrURL)
if err != nil { if err != nil {
return err return fmt.Errorf("export: %w", err)
} }
defer func() { _ = rc.Close() }() defer func() { _ = rc.Close() }()
@@ -39,7 +39,7 @@ func (mfa *CLIApp) exportManifestOperation(
//nolint:contextcheck // mfer loads a manifest without a context //nolint:contextcheck // mfer loads a manifest without a context
manifest, err := mfer.NewManifestFromReader(rc) manifest, err := mfer.NewManifestFromReader(rc)
if err != nil { if err != nil {
return fmt.Errorf("parse manifest: %w", err) return fmt.Errorf("export: failed to parse manifest: %w", err)
} }
files := manifest.Files() files := manifest.Files()
@@ -76,7 +76,7 @@ func (mfa *CLIApp) exportManifestOperation(
err = enc.Encode(entries) err = enc.Encode(entries)
if err != nil { if err != nil {
return fmt.Errorf("encode JSON: %w", err) return fmt.Errorf("export: failed to encode JSON: %w", err)
} }
return nil return nil
internal/cli/fetch.go
+33 -35
View File
@@ -239,7 +239,7 @@ func reportDownloadProgress(progress <-chan DownloadProgress, done chan<- struct
func manifestBaseURL(manifestURL string) (*url.URL, error) { func manifestBaseURL(manifestURL string) (*url.URL, error) {
parsed, err := url.Parse(manifestURL) parsed, err := url.Parse(manifestURL)
if err != nil { if err != nil {
return nil, fmt.Errorf("invalid manifest URL: %w", err) return nil, fmt.Errorf("fetch: invalid manifest URL: %w", err)
} }
// JoinPath cleans the path it builds, so ".." drops the manifest's // JoinPath cleans the path it builds, so ".." drops the manifest's
@@ -268,7 +268,7 @@ func downloadManifestFiles(
// Sanitize the path to prevent path traversal attacks // Sanitize the path to prevent path traversal attacks
localPath, err := sanitizePath(f.GetPath()) localPath, err := sanitizePath(f.GetPath())
if err != nil { if err != nil {
return 0, 0, fmt.Errorf("invalid file entry: %w", err) return 0, 0, fmt.Errorf("invalid path in manifest: %w", err)
} }
if alreadyPresent(dest, localPath, f) { if alreadyPresent(dest, localPath, f) {
@@ -284,7 +284,7 @@ func downloadManifestFiles(
err = downloadFile(ctx, client, fileURL, dest, localPath, f, progress) err = downloadFile(ctx, client, fileURL, dest, localPath, f, progress)
if err != nil { if err != nil {
return 0, 0, fmt.Errorf("download %s: %w", f.GetPath(), err) return 0, 0, fmt.Errorf("failed to download %s: %w", f.GetPath(), err)
} }
downloaded++ downloaded++
@@ -361,7 +361,7 @@ func (mfa *CLIApp) fetchManifestOperation(
firstDelay: firstRetryDelay, firstDelay: firstRetryDelay,
} }
manifestData, files, err := mfa.fetchManifest(ctx, cmd, client, manifestURL) manifestData, files, err := fetchManifest(ctx, cmd, client, manifestURL)
if err != nil { if err != nil {
return err return err
} }
@@ -376,7 +376,7 @@ func (mfa *CLIApp) fetchManifestOperation(
err = os.MkdirAll(dest, dirPerms) err = os.MkdirAll(dest, dirPerms)
if err != nil { if err != nil {
return err return fmt.Errorf("failed to create destination directory %s: %w", dest, err)
} }
// Create progress channel and start progress reporter goroutine // Create progress channel and start progress reporter goroutine
@@ -403,7 +403,7 @@ func (mfa *CLIApp) fetchManifestOperation(
// "mfer check" can verify the tree later. // "mfer check" can verify the tree later.
err = saveManifest(dest, manifestData) err = saveManifest(dest, manifestData)
if err != nil { if err != nil {
return fmt.Errorf("save manifest: %w", err) return fmt.Errorf("failed to save manifest: %w", err)
} }
// Print summary // Print summary
@@ -426,45 +426,37 @@ func (mfa *CLIApp) fetchManifestOperation(
// that lists a file where fetch writes another or a mode outside 0777. It // that lists a file where fetch writes another or a mode outside 0777. It
// returns the manifest as downloaded, to be saved once the files are in // returns the manifest as downloaded, to be saved once the files are in
// place, and the files it lists. // place, and the files it lists.
func (mfa *CLIApp) fetchManifest( func fetchManifest(
ctx context.Context, cmd *cli.Command, client retryingClient, manifestURL string, ctx context.Context, cmd *cli.Command, client retryingClient, manifestURL string,
) ([]byte, []*mfer.MFFilePath, error) { ) ([]byte, []*mfer.MFFilePath, error) {
log.Infof("fetching manifest from %s", manifestURL) log.Infof("fetching manifest from %s", manifestURL)
// Read the whole manifest before parsing it, so that a connection // Read the whole manifest before parsing it, so that a connection
// lost partway through is retried rather than reported as a bad // lost partway through is retried rather than reported as a bad
// manifest. Reading stops one byte past mfa.maxManifestSize, which is // manifest.
// enough to tell that the manifest is too large.
var manifestData []byte var manifestData []byte
err := client.get(ctx, manifestURL, func(resp *http.Response) error { err := client.get(ctx, manifestURL, func(resp *http.Response) error {
var readErr error var readErr error
manifestData, readErr = io.ReadAll( manifestData, readErr = io.ReadAll(resp.Body)
io.LimitReader(resp.Body, mfa.maxManifestSize+1))
return readErr return readErr
}) })
if err != nil { if err != nil {
return nil, nil, fmt.Errorf("download manifest: %w", err) return nil, nil, fmt.Errorf("failed to fetch manifest: %w", err)
}
if int64(len(manifestData)) > mfa.maxManifestSize {
return nil, nil, fmt.Errorf("download manifest: %w of %d bytes",
errManifestTooLarge, mfa.maxManifestSize)
} }
// Parse manifest // Parse manifest
//nolint:contextcheck // mfer loads a manifest without a context //nolint:contextcheck // mfer loads a manifest without a context
manifest, err := mfer.NewManifestFromReader(bytes.NewReader(manifestData)) manifest, err := mfer.NewManifestFromReader(bytes.NewReader(manifestData))
if err != nil { if err != nil {
return nil, nil, fmt.Errorf("parse manifest: %w", err) return nil, nil, fmt.Errorf("failed to parse manifest: %w", err)
} }
requiredSigner := cmd.String(flagRequireSignature) requiredSigner := cmd.String(flagRequireSignature)
if requiredSigner != "" { if requiredSigner != "" {
//nolint:contextcheck // mfer loads a manifest without a context err = verifyFetchedSigner(ctx, manifestData, requiredSigner)
err = verifyFetchedSigner(manifestData, requiredSigner)
if err != nil { if err != nil {
return nil, nil, err return nil, nil, err
} }
@@ -546,7 +538,9 @@ func checkNoNameClash(files []*mfer.MFFilePath) error {
// exactly as check does. verifyRequiredSigner takes a Checker, which loads // exactly as check does. verifyRequiredSigner takes a Checker, which loads
// its manifest from a file, so the manifest is handed to it as a file in // its manifest from a file, so the manifest is handed to it as a file in
// memory. // memory.
func verifyFetchedSigner(manifestData []byte, requiredSigner string) error { func verifyFetchedSigner(
ctx context.Context, manifestData []byte, requiredSigner string,
) error {
memFs := afero.NewMemMapFs() memFs := afero.NewMemMapFs()
manifestPath := "/" + defaultManifestName manifestPath := "/" + defaultManifestName
@@ -555,16 +549,17 @@ func verifyFetchedSigner(manifestData []byte, requiredSigner string) error {
return err return err
} }
//nolint:contextcheck // mfer loads a manifest without a context
chk, err := mfer.NewChecker(&mfer.CheckerOptions{ chk, err := mfer.NewChecker(&mfer.CheckerOptions{
ManifestPath: manifestPath, ManifestPath: manifestPath,
BasePath: "/", BasePath: "/",
Fs: memFs, Fs: memFs,
}) })
if err != nil { if err != nil {
return fmt.Errorf("load manifest: %w", err) return fmt.Errorf("failed to load manifest: %w", err)
} }
return verifyRequiredSigner(chk, requiredSigner) return verifyRequiredSigner(ctx, chk, requiredSigner)
} }
// saveManifest writes the fetched manifest into dest under the default // saveManifest writes the fetched manifest into dest under the default
@@ -644,7 +639,7 @@ func sanitizePath(p string) (string, error) {
func checkNoSymlinks(dest, p string) error { func checkNoSymlinks(dest, p string) error {
current := dest current := dest
for part := range strings.SplitSeq(p, string(filepath.Separator)) { for _, part := range strings.Split(p, string(filepath.Separator)) {
current = filepath.Join(current, part) current = filepath.Join(current, part)
info, err := os.Lstat(current) info, err := os.Lstat(current)
@@ -653,7 +648,7 @@ func checkNoSymlinks(dest, p string) error {
} }
if err != nil { if err != nil {
return err return fmt.Errorf("failed to check %s for a symlink: %w", current, err)
} }
if info.Mode()&os.ModeSymlink != 0 { if info.Mode()&os.ModeSymlink != 0 {
@@ -770,7 +765,7 @@ func tempPathFor(localPath string) string {
func verifyDownloadedHash(digest []byte, entry *mfer.MFFilePath) error { func verifyDownloadedHash(digest []byte, entry *mfer.MFFilePath) error {
computed, err := multihash.Encode(digest, multihash.SHA2_256) computed, err := multihash.Encode(digest, multihash.SHA2_256)
if err != nil { if err != nil {
return fmt.Errorf("encode hash: %w", err) return fmt.Errorf("failed to encode hash: %w", err)
} }
for _, hash := range entry.GetHashes() { for _, hash := range entry.GetHashes() {
@@ -797,7 +792,7 @@ func downloadFile(
// so every entry point to downloadFile gets the same treatment. // so every entry point to downloadFile gets the same treatment.
localPath, err := sanitizePath(localPath) localPath, err := sanitizePath(localPath)
if err != nil { if err != nil {
return fmt.Errorf("invalid file entry: %w", err) return fmt.Errorf("invalid path: %w", err)
} }
// Create parent directories if needed // Create parent directories if needed
@@ -812,7 +807,7 @@ func downloadFile(
err = os.MkdirAll(dir, dirPerms) err = os.MkdirAll(dir, dirPerms)
if err != nil { if err != nil {
return err return fmt.Errorf("failed to create directory %s: %w", dir, err)
} }
} }
@@ -846,7 +841,7 @@ func createTempFile(dest, tmpPath string) (*os.File, error) {
out, err := os.OpenFile( //nolint:gosec // G304: see comment above out, err := os.OpenFile( //nolint:gosec // G304: see comment above
path, os.O_RDWR|os.O_CREATE|os.O_EXCL, filePerms) path, os.O_RDWR|os.O_CREATE|os.O_EXCL, filePerms)
if err != nil { if err != nil {
return nil, err return nil, fmt.Errorf("failed to create temp file: %w", err)
} }
return out, nil return out, nil
@@ -859,7 +854,12 @@ func moveIntoPlace(dest, tmpPath, localPath string) error {
return err return err
} }
return os.Rename(filepath.Join(dest, tmpPath), filepath.Join(dest, localPath)) err = os.Rename(filepath.Join(dest, tmpPath), filepath.Join(dest, localPath))
if err != nil {
return fmt.Errorf("failed to rename temp file: %w", err)
}
return nil
} }
// saveResponse writes resp's body to tmpPath, verifies it against entry, // saveResponse writes resp's body to tmpPath, verifies it against entry,
@@ -894,7 +894,7 @@ func saveResponse(
_ = out.Close() _ = out.Close()
_ = os.Remove(filepath.Join(dest, tmpPath)) _ = os.Remove(filepath.Join(dest, tmpPath))
return err return fmt.Errorf("failed to set mode: %w", err)
} }
} }
@@ -910,10 +910,8 @@ func saveResponse(
progress: progress, progress: progress,
} }
// Copy content while hashing and reporting progress. One byte past // Copy content while hashing and reporting progress
// the listed size is enough for finishDownload to report a size written, copyErr := io.Copy(pw, resp.Body)
// mismatch.
written, copyErr := io.Copy(pw, io.LimitReader(resp.Body, expectedSize+1))
// Close file before checking errors (to flush writes) // Close file before checking errors (to flush writes)
closeErr := out.Close() closeErr := out.Close()
internal/cli/fetch_test.go
+21 -97
View File
@@ -19,14 +19,13 @@ import (
"sync/atomic" "sync/atomic"
"testing" "testing"
"time" "time"
"uuid"
"github.com/google/uuid"
"github.com/klauspost/compress/zstd" "github.com/klauspost/compress/zstd"
"github.com/multiformats/go-multihash" "github.com/multiformats/go-multihash"
"github.com/spf13/afero" "github.com/spf13/afero"
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require" "github.com/stretchr/testify/require"
urfcli "github.com/urfave/cli/v3"
"google.golang.org/protobuf/proto" "google.golang.org/protobuf/proto"
"sneak.berlin/go/mfer/mfer" "sneak.berlin/go/mfer/mfer"
) )
@@ -187,7 +186,12 @@ func chdirTemp(t *testing.T) string {
t.Helper() t.Helper()
destDir := t.TempDir() destDir := t.TempDir()
t.Chdir(destDir)
origDir, err := os.Getwd()
require.NoError(t, err)
require.NoError(t, os.Chdir(destDir))
t.Cleanup(func() { _ = os.Chdir(origDir) })
return destDir return destDir
} }
@@ -442,76 +446,6 @@ func TestFetchSizeMismatch(t *testing.T) {
"temp file should be cleaned up on size mismatch") "temp file should be cleaned up on size mismatch")
} }
// zeros is an io.Reader of zero bytes without end.
type zeros struct{}
func (zeros) Read(p []byte) (int, error) {
clear(p)
return len(p), nil
}
// TestFetchStopsReadingFilePastListedSize serves a body that never ends
// for a file listed at 16 bytes. fetch must stop reading one byte past
// the listed size, report the size mismatch and remove its temp file.
//
//nolint:paralleltest // changes the process-global working directory
func TestFetchStopsReadingFilePastListedSize(t *testing.T) {
server := httptest.NewServer(
http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
_, _ = io.Copy(w, zeros{})
}))
defer server.Close()
chdirTemp(t)
err := downloadFile(context.Background(), testClient(),
server.URL+"/"+testFileTxt, ".", testFileTxt,
&mfer.MFFilePath{Path: testFileTxt, Size: 16}, nil)
require.ErrorIs(t, err, errSizeMismatch)
require.EqualError(t, err, "size mismatch: expected 16 bytes, got 17")
assert.NoFileExists(t, tempPathFor(testFileTxt))
}
// TestManifestDownloadStopsAtLimit serves a manifest that never ends to
// fetch and to check, with the most they download of a manifest lowered
// to 64 KiB. Each must stop reading at that limit, fail with an error
// naming it and leave no temp file.
func TestManifestDownloadStopsAtLimit(t *testing.T) {
server := httptest.NewServer(
http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
_, _ = io.Copy(w, zeros{})
}))
defer server.Close()
tmpDir := t.TempDir()
t.Setenv("TMPDIR", tmpDir)
mfa := &CLIApp{Fs: afero.NewOsFs(), maxManifestSize: 64 << 10}
fetch := mfa.fetchCommand()
fetch.Action = mfa.fetchManifestOperation
check := mfa.checkCommand()
check.Action = mfa.checkManifestOperation
for _, cmd := range []*urfcli.Command{fetch, check} {
// Both operations log to the process-global logger.
err := runLocked(func() error {
return cmd.Run(context.Background(),
[]string{cmd.Name, server.URL + "/index.mf"})
})
require.ErrorIs(t, err, errManifestTooLarge, cmd.Name)
require.EqualError(t, err,
"download manifest: file exceeds maximum allowed size of 65536 bytes",
cmd.Name)
}
leftover, err := os.ReadDir(tmpDir)
require.NoError(t, err)
assert.Empty(t, leftover)
}
//nolint:paralleltest // changes the process-global working directory //nolint:paralleltest // changes the process-global working directory
func TestFetchProgress(t *testing.T) { func TestFetchProgress(t *testing.T) {
// Create source filesystem with a larger test file // Create source filesystem with a larger test file
@@ -606,27 +540,27 @@ func TestFetchRefusesSymlinks(t *testing.T) {
}{ }{
{ {
"parent directory", "sub/deeper/file.txt", "sub", ".", "parent directory", "sub/deeper/file.txt", "sub", ".",
"download sub/deeper/file.txt", "failed to download sub/deeper/file.txt",
}, },
{ {
"directory inside a plain directory", "docs/data/passwd", "docs/data", ".", "directory inside a plain directory", "docs/data/passwd", "docs/data", ".",
"download docs/data/passwd", "failed to download docs/data/passwd",
}, },
{ {
"temp file", testFileTxt, ".file.txt.tmp", newFile, "temp file", testFileTxt, ".file.txt.tmp", newFile,
"download " + testFileTxt, "failed to download " + testFileTxt,
}, },
{ {
"file", testFileTxt, testFileTxt, newFile, "file", testFileTxt, testFileTxt, newFile,
"download " + testFileTxt, "failed to download " + testFileTxt,
}, },
{ {
"manifest temp file", testFileTxt, tempPathFor(defaultManifestName), newFile, "manifest temp file", testFileTxt, tempPathFor(defaultManifestName), newFile,
"save manifest", "failed to save manifest",
}, },
{ {
"manifest", testFileTxt, defaultManifestName, newFile, "manifest", testFileTxt, defaultManifestName, newFile,
"save manifest", "failed to save manifest",
}, },
} }
@@ -693,7 +627,7 @@ func TestFetchDoesNotSkipThroughSymlink(t *testing.T) {
}, afero.NewOsFs()) }, afero.NewOsFs())
assert.Equal(t, 1, runCLI(opts)) assert.Equal(t, 1, runCLI(opts))
assert.Contains(t, testStderr(t, opts), assert.Contains(t, testStderr(t, opts),
"download sub/"+testFileTxt+": symlink in path not allowed: "+link) "failed to download sub/"+testFileTxt+": symlink in path not allowed: "+link)
assert.Equal(t, map[string][]byte{testFileTxt: content}, filesUnder(t, outside)) assert.Equal(t, map[string][]byte{testFileTxt: content}, filesUnder(t, outside))
} }
@@ -763,8 +697,7 @@ func TestGetRetriesTransientStatusesOnly(t *testing.T) {
err := getNothing(testClient(), server.URL, 10*time.Second) err := getNothing(testClient(), server.URL, 10*time.Second)
require.ErrorIs(t, err, errHTTPStatus) require.ErrorIs(t, err, errHTTPStatus)
require.EqualError(t, err, require.EqualError(t, err, fmt.Sprintf("HTTP %d", tt.status))
fmt.Sprintf("unexpected HTTP status %d", tt.status))
assert.Equal(t, tt.requests, requests.Load()) assert.Equal(t, tt.requests, requests.Load())
}) })
} }
@@ -1189,10 +1122,8 @@ func TestFetchIntoDest(t *testing.T) {
// TestFetchRequireSignature runs fetch with --require-signature. A // TestFetchRequireSignature runs fetch with --require-signature. A
// manifest that is unsigned, or signed by another key, must stop fetch // manifest that is unsigned, or signed by another key, must stop fetch
// with check's message before it downloads or writes anything; the // with check's message before it downloads or writes anything; the
// required key lets it through. A manifest signed by another key whose // required key lets it through. The signed cases need gpg and are skipped
// embedded public key block also holds the required key must stop fetch // without it, as the other signing tests are.
// too. The signed cases need gpg and are skipped without it, as the other
// signing tests are.
// //
//nolint:paralleltest // signedManifest calls t.Setenv, which bars t.Parallel //nolint:paralleltest // signedManifest calls t.Setenv, which bars t.Parallel
func TestFetchRequireSignature(t *testing.T) { func TestFetchRequireSignature(t *testing.T) {
@@ -1207,7 +1138,9 @@ func TestFetchRequireSignature(t *testing.T) {
t.Run("signed", func(t *testing.T) { t.Run("signed", func(t *testing.T) {
manifest := signedManifest(t, files) manifest := signedManifest(t, files)
signer := string(signedChecker(t, manifest).Signer()) signer, err := signedChecker(t, manifest).
ExtractEmbeddedSigningKeyFP(context.Background())
require.NoError(t, err)
assertFetchRefused(t, manifest, files, assertFetchRefused(t, manifest, files,
"embedded signing key fingerprint "+signer+" does not match required "+msgFpB, "embedded signing key fingerprint "+signer+" does not match required "+msgFpB,
@@ -1225,15 +1158,6 @@ func TestFetchRequireSignature(t *testing.T) {
require.Equal(t, 0, runCLI(opts), testStderr(t, opts)) require.Equal(t, 0, runCLI(opts), testStderr(t, opts))
assert.Equal(t, files[testFileTxt], filesUnder(t, dest)[testFileTxt]) assert.Equal(t, files[testFileTxt], filesUnder(t, dest)[testFileTxt])
}) })
t.Run("signed by another key embedded after the required one", func(t *testing.T) {
manifest, required := manifestSignedByAnotherKey(t, files)
assertFetchRefused(t, manifest, files,
"parse manifest: "+
"embedded public key block must hold exactly one key, found 2",
"--"+flagRequireSignature, required)
})
} }
// TestFetchRefusesListedManifestName fetches manifests that list, at the // TestFetchRefusesListedManifestName fetches manifests that list, at the
@@ -1532,7 +1456,7 @@ func manifestWithMode(t *testing.T, path string, content []byte, mode uint32) []
hash, err := multihash.Encode(digest[:], multihash.SHA2_256) hash, err := multihash.Encode(digest[:], multihash.SHA2_256)
require.NoError(t, err) require.NoError(t, err)
id := uuid.NewV4() id := uuid.New()
inner, err := proto.Marshal(&mfer.MFFile{ inner, err := proto.Marshal(&mfer.MFFile{
Version: mfer.MFFile_VERSION_ONE, Version: mfer.MFFile_VERSION_ONE,
internal/cli/freshen.go
+30 -16
View File
@@ -165,7 +165,8 @@ func (s *freshenScanner) walk(path string, info fs.FileInfo, walkErr error) erro
// Get relative path // Get relative path
relPath, err := filepath.Rel(s.absBase, path) relPath, err := filepath.Rel(s.absBase, path)
if err != nil { if err != nil {
return err return fmt.Errorf(
"freshen: failed to compute relative path for %s: %w", path, err)
} }
// Handle dotfiles // Handle dotfiles
@@ -279,8 +280,13 @@ func (h *freshenHasher) reportProgress(n int64) {
// processEntry hashes the entry if needed and adds it to the builder. // processEntry hashes the entry if needed and adds it to the builder.
func (h *freshenHasher) processEntry(e *freshenEntry) error { func (h *freshenHasher) processEntry(e *freshenEntry) error {
if !e.needsHash { if !e.needsHash {
// Use existing entry; the error names the entry // Use existing entry
return addExistingToBuilder(h.builder, e.existing) err := addExistingToBuilder(h.builder, e.existing)
if err != nil {
return fmt.Errorf("failed to add %s: %w", e.path, err)
}
return nil
} }
// Need to read and hash the file // Need to read and hash the file
@@ -288,21 +294,26 @@ func (h *freshenHasher) processEntry(e *freshenEntry) error {
f, err := h.fs.Open(absPath) f, err := h.fs.Open(absPath)
if err != nil { if err != nil {
return err return fmt.Errorf("failed to open %s: %w", e.path, err)
} }
hash, bytesRead, err := hashFile(f, h.reportProgress) hash, bytesRead, err := hashFile(f, h.reportProgress)
_ = f.Close() _ = f.Close()
if err != nil { if err != nil {
return err return fmt.Errorf("failed to hash %s: %w", e.path, err)
} }
h.hashedBytes += bytesRead h.hashedBytes += bytesRead
h.hashedFiles++ h.hashedFiles++
// Add to builder with computed hash; a refused path is named in the error // Add to builder with computed hash
return addFileToBuilder(h.builder, e.path, e.size, e.mtime, e.mode, hash) err = addFileToBuilder(h.builder, e.path, e.size, e.mtime, e.mode, hash)
if err != nil {
return fmt.Errorf("failed to add %s: %w", e.path, err)
}
return nil
} }
// writeFreshenedManifest writes the manifest atomically (write to a // writeFreshenedManifest writes the manifest atomically (write to a
@@ -314,7 +325,7 @@ func writeFreshenedManifest(
outFile, err := afs.Create(tmpPath) outFile, err := afs.Create(tmpPath)
if err != nil { if err != nil {
return err return fmt.Errorf("failed to create temp file: %w", err)
} }
err = builder.Build(ctx, outFile) err = builder.Build(ctx, outFile)
@@ -323,7 +334,7 @@ func writeFreshenedManifest(
if err != nil { if err != nil {
_ = afs.Remove(tmpPath) _ = afs.Remove(tmpPath)
return fmt.Errorf("build manifest: %w", err) return fmt.Errorf("failed to write manifest: %w", err)
} }
// Rename temp to final // Rename temp to final
@@ -331,7 +342,7 @@ func writeFreshenedManifest(
if err != nil { if err != nil {
_ = afs.Remove(tmpPath) _ = afs.Remove(tmpPath)
return err return fmt.Errorf("failed to rename manifest: %w", err)
} }
return nil return nil
@@ -397,7 +408,7 @@ func (mfa *CLIApp) freshenScan(
} }
if err != nil { if err != nil {
return nil, 0, fmt.Errorf("scan filesystem: %w", err) return nil, 0, fmt.Errorf("failed to scan filesystem: %w", err)
} }
// Remaining entries in existingByPath are removed files // Remaining entries in existingByPath are removed files
@@ -466,7 +477,7 @@ func (mfa *CLIApp) loadExistingEntries(
Fs: mfa.Fs, Fs: mfa.Fs,
}) })
if err != nil { if err != nil {
return nil, fmt.Errorf("load manifest: %w", err) return nil, fmt.Errorf("failed to load manifest: %w", err)
} }
existingFiles := manifest.Files() existingFiles := manifest.Files()
@@ -486,12 +497,13 @@ func (mfa *CLIApp) freshenManifestOperation(
) error { ) error {
log.Debug("freshenManifestOperation()") log.Debug("freshenManifestOperation()")
basePath := cmd.String("base")
showProgress := cmd.Bool("progress") showProgress := cmd.Bool("progress")
// Find manifest file // Find manifest file
manifestPath, err := mfa.resolveFreshenManifestPath(cmd) manifestPath, err := mfa.resolveFreshenManifestPath(cmd)
if err != nil { if err != nil {
return err return fmt.Errorf("freshen: %w", err)
} }
//nolint:contextcheck // mfer loads a manifest without a context //nolint:contextcheck // mfer loads a manifest without a context
@@ -500,9 +512,9 @@ func (mfa *CLIApp) freshenManifestOperation(
return err return err
} }
absBase, err := filepath.Abs(resolveBasePath(cmd, manifestPath)) absBase, err := filepath.Abs(basePath)
if err != nil { if err != nil {
return fmt.Errorf("invalid base path: %w", err) return fmt.Errorf("freshen: invalid base path: %w", err)
} }
// Phase 1: Scan filesystem // Phase 1: Scan filesystem
@@ -594,7 +606,9 @@ func hashFile(r io.Reader, progress func(int64)) ([]byte, int64, error) {
break break
} }
// Returned unwrapped: a read error already names the file. // Returned unwrapped: the caller renders this as
// "failed to hash <path>: <err>" and adding a second layer here
// would change that message.
if err != nil { if err != nil {
return nil, total, err return nil, total, err
} }
internal/cli/freshen_test.go
-36
View File
@@ -7,7 +7,6 @@ import (
"os" "os"
"path/filepath" "path/filepath"
"slices" "slices"
"strings"
"testing" "testing"
"time" "time"
@@ -301,41 +300,6 @@ func TestFreshenLeavesLeftoverTempFileOutOfListing(t *testing.T) {
manifestPaths(t, fs, manifestPath)) manifestPaths(t, fs, manifestPath))
} }
// TestFreshenResolvesEntriesAgainstManifestDirectory adds sub/c.txt, then
// runs freshen from the directory above sub, on the manifest in sub.
// Without --base, the manifest then lists the files in sub, whether freshen
// is given the manifest or sub. --base names the directory to list instead,
// the current one included.
//
//nolint:paralleltest // changes the process-global working directory
func TestFreshenResolvesEntriesAgainstManifestDirectory(t *testing.T) {
for _, tc := range []struct {
args []string
want []string // the paths the manifest lists afterwards
}{
{[]string{testSubdir}, []string{"b.txt", "c.txt"}},
{[]string{testSubdirManifest}, []string{"b.txt", "c.txt"}},
{
[]string{testFlagBase, ".", testSubdirManifest},
[]string{testFileTxt, "sub/b.txt", "sub/c.txt"},
},
} {
t.Run(strings.Join(tc.args, " "), func(t *testing.T) {
fs := afero.NewOsFs()
root := setupManifestInSubdir(t)
writeTestFile(t, fs, filepath.Join(root, testSubdir, "c.txt"), "added")
opts := testOpts(slices.Concat(
[]string{testApp, cmdFreshen, "-q"}, tc.args,
), fs)
require.Equal(t, 0, runCLI(opts), "stderr: %s", testStderr(t, opts))
assert.ElementsMatch(t, tc.want, manifestPaths(t, fs,
filepath.Join(root, testSubdirManifest)))
})
}
}
// TestFreshenRecordEntryMtimePresence pins the behavior of recordEntry // TestFreshenRecordEntryMtimePresence pins the behavior of recordEntry
// with respect to MFFilePath.Mtime, which is a message pointer with // with respect to MFFilePath.Mtime, which is a message pointer with
// proto3 field presence and may legitimately be absent. // proto3 field presence and may legitimately be absent.
internal/cli/gen.go
+8 -7
View File
@@ -74,7 +74,7 @@ func (mfa *CLIApp) collectInputPaths(args cli.Args) ([]string, error) {
ap, err := filepath.Abs(inputPath) ap, err := filepath.Abs(inputPath)
if err != nil { if err != nil {
return nil, fmt.Errorf("invalid path %q: %w", inputPath, err) return nil, fmt.Errorf("generate: invalid path %q: %w", inputPath, err)
} }
// Validate path exists before adding to list // Validate path exists before adding to list
if exists, _ := afero.Exists(mfa.Fs, ap); !exists { if exists, _ := afero.Exists(mfa.Fs, ap); !exists {
@@ -129,7 +129,8 @@ func (mfa *CLIApp) enumerateInputs(
// Default to current directory // Default to current directory
err := s.EnumeratePath(".", enumProgress) err := s.EnumeratePath(".", enumProgress)
if err != nil { if err != nil {
return fmt.Errorf("enumerate current directory: %w", err) return fmt.Errorf(
"generate: failed to enumerate current directory: %w", err)
} }
return nil return nil
@@ -143,7 +144,7 @@ func (mfa *CLIApp) enumerateInputs(
err = s.EnumeratePaths(enumProgress, paths...) err = s.EnumeratePaths(enumProgress, paths...)
if err != nil { if err != nil {
return fmt.Errorf("enumerate files: %w", err) return fmt.Errorf("generate: failed to enumerate paths: %w", err)
} }
return nil return nil
@@ -228,7 +229,7 @@ func (mfa *CLIApp) generateManifestOperation(
outFile, err := mfa.Fs.Create(tmpPath) outFile, err := mfa.Fs.Create(tmpPath)
if err != nil { if err != nil {
return err return fmt.Errorf("failed to create temp file: %w", err)
} }
// Set up signal handler to clean up temp file on Ctrl-C // Set up signal handler to clean up temp file on Ctrl-C
@@ -267,19 +268,19 @@ func (mfa *CLIApp) generateManifestOperation(
scanWg.Wait() scanWg.Wait()
if err != nil { if err != nil {
return fmt.Errorf("generate manifest: %w", err) return fmt.Errorf("failed to generate manifest: %w", err)
} }
// Close file before rename to ensure all data is flushed // Close file before rename to ensure all data is flushed
err = outFile.Close() err = outFile.Close()
if err != nil { if err != nil {
return err return fmt.Errorf("failed to close temp file: %w", err)
} }
// Atomic rename // Atomic rename
err = mfa.Fs.Rename(tmpPath, outputPath) err = mfa.Fs.Rename(tmpPath, outputPath)
if err != nil { if err != nil {
return err return fmt.Errorf("failed to rename temp file: %w", err)
} }
success = true success = true
internal/cli/list.go
+3 -3
View File
@@ -19,12 +19,12 @@ func (mfa *CLIApp) listManifestOperation(ctx context.Context, cmd *cli.Command)
pathOrURL, err := mfa.resolveManifestArg(cmd) pathOrURL, err := mfa.resolveManifestArg(cmd)
if err != nil { if err != nil {
return err return fmt.Errorf("list: %w", err)
} }
rc, err := mfa.openManifestReader(ctx, pathOrURL) rc, err := mfa.openManifestReader(ctx, pathOrURL)
if err != nil { if err != nil {
return err return fmt.Errorf("list: %w", err)
} }
defer func() { _ = rc.Close() }() defer func() { _ = rc.Close() }()
@@ -32,7 +32,7 @@ func (mfa *CLIApp) listManifestOperation(ctx context.Context, cmd *cli.Command)
//nolint:contextcheck // mfer loads a manifest without a context //nolint:contextcheck // mfer loads a manifest without a context
manifest, err := mfer.NewManifestFromReader(rc) manifest, err := mfer.NewManifestFromReader(rc)
if err != nil { if err != nil {
return fmt.Errorf("parse manifest: %w", err) return fmt.Errorf("list: failed to parse manifest: %w", err)
} }
files := manifest.Files() files := manifest.Files()
internal/cli/manifest_loader.go
+10 -27
View File
@@ -6,7 +6,6 @@ import (
"fmt" "fmt"
"io" "io"
"net/http" "net/http"
"path/filepath"
"strings" "strings"
"time" "time"
@@ -16,13 +15,13 @@ import (
// manifestFetchTimeout bounds HTTP requests made to fetch a manifest. // manifestFetchTimeout bounds HTTP requests made to fetch a manifest.
const manifestFetchTimeout = 30 * time.Second const manifestFetchTimeout = 30 * time.Second
// errHTTPStatus indicates an HTTP response with a non-OK status code. It is // errHTTPStatus indicates an HTTP response with a non-OK status code.
// followed by the code, as in "unexpected HTTP status 404". //
var errHTTPStatus = errors.New("unexpected HTTP status") // Its text is the literal "HTTP" prefix of the rendered "HTTP <code>"
// message that mfer has always printed, so that wrapping it does not
// errManifestTooLarge indicates a manifest download that passed // change any user-visible output. Match it with errors.Is; do not read
// CLIApp.maxManifestSize. // its message.
var errManifestTooLarge = errors.New("file exceeds maximum allowed size") var errHTTPStatus = errors.New("HTTP")
// isHTTPURL returns true if the string starts with http:// or https://. // isHTTPURL returns true if the string starts with http:// or https://.
func isHTTPURL(s string) bool { func isHTTPURL(s string) bool {
@@ -37,22 +36,20 @@ func (mfa *CLIApp) openManifestReader(
if isHTTPURL(pathOrURL) { if isHTTPURL(pathOrURL) {
client := &http.Client{Timeout: manifestFetchTimeout} client := &http.Client{Timeout: manifestFetchTimeout}
// The *url.Error that NewRequestWithContext and Do return names
// the URL.
req, err := http.NewRequestWithContext(ctx, http.MethodGet, pathOrURL, nil) req, err := http.NewRequestWithContext(ctx, http.MethodGet, pathOrURL, nil)
if err != nil { if err != nil {
return nil, fmt.Errorf("download manifest: %w", err) return nil, fmt.Errorf("failed to fetch %s: %w", pathOrURL, err)
} }
resp, err := client.Do(req) resp, err := client.Do(req)
if err != nil { if err != nil {
return nil, fmt.Errorf("download manifest: %w", err) return nil, fmt.Errorf("failed to fetch %s: %w", pathOrURL, err)
} }
if resp.StatusCode != http.StatusOK { if resp.StatusCode != http.StatusOK {
_ = resp.Body.Close() _ = resp.Body.Close()
return nil, fmt.Errorf("download manifest %s: %w %d", return nil, fmt.Errorf("failed to fetch %s: %w %d",
pathOrURL, errHTTPStatus, resp.StatusCode) pathOrURL, errHTTPStatus, resp.StatusCode)
} }
@@ -87,17 +84,3 @@ func (mfa *CLIApp) resolveManifestArg(cmd *cli.Command) (string, error) {
return findManifest(mfa.Fs, ".") return findManifest(mfa.Fs, ".")
} }
// resolveBasePath returns the directory a manifest's paths are resolved
// against: the one --base names, or else the directory holding the manifest,
// or the current directory for a manifest URL.
func resolveBasePath(cmd *cli.Command, manifestPath string) string {
switch {
case cmd.IsSet(flagBase):
return cmd.String(flagBase)
case isHTTPURL(manifestPath):
return "."
default:
return filepath.Dir(manifestPath)
}
}
internal/cli/mfer.go
+6 -12
View File
@@ -24,7 +24,6 @@ const (
cmdList = "list" cmdList = "list"
cmdVersion = "version" cmdVersion = "version"
flagBase = "base"
flagProgress = "progress" flagProgress = "progress"
flagTimeout = "timeout" flagTimeout = "timeout"
flagDest = "dest" flagDest = "dest"
@@ -60,10 +59,6 @@ type CLIApp struct {
exitCode int exitCode int
app *cli.Command app *cli.Command
// maxManifestSize is the most of a manifest that fetch, and check
// given a URL, download: mfer.MaxManifestSize, which tests lower.
maxManifestSize int64
Stdin io.Reader // Standard input stream Stdin io.Reader // Standard input stream
Stdout io.Writer // Standard output stream for normal output Stdout io.Writer // Standard output stream for normal output
Stderr io.Writer // Standard error stream for diagnostics Stderr io.Writer // Standard error stream for diagnostics
@@ -260,11 +255,10 @@ func (mfa *CLIApp) checkCommand() *cli.Command {
}, },
Flags: append(commonFlags(), Flags: append(commonFlags(),
&cli.StringFlag{ &cli.StringFlag{
Name: flagBase, Name: "base",
Aliases: []string{"b"}, Aliases: []string{"b"},
Usage: "Base directory for resolving relative paths from manifest " + Value: ".",
"(by default the directory holding the manifest, or the " + Usage: "Base directory for resolving relative paths from manifest",
"current directory for a manifest URL)",
}, },
&cli.BoolFlag{ &cli.BoolFlag{
Name: flagProgress, Name: flagProgress,
@@ -294,10 +288,10 @@ func (mfa *CLIApp) freshenCommand() *cli.Command {
}, },
Flags: append(commonFlags(), Flags: append(commonFlags(),
&cli.StringFlag{ &cli.StringFlag{
Name: flagBase, Name: "base",
Aliases: []string{"b"}, Aliases: []string{"b"},
Usage: "Base directory for resolving relative paths " + Value: ".",
"(by default the directory holding the manifest)", Usage: "Base directory for resolving relative paths",
}, },
&cli.BoolFlag{ &cli.BoolFlag{
Name: "follow-symlinks", Name: "follow-symlinks",
internal/cli/testdata/seeded.mf
Vendored
BIN
View File
Binary file not shown.
mfer/builder.go
+18 -28
View File
@@ -38,7 +38,6 @@ var (
errNegativeSize = errors.New("size cannot be negative") errNegativeSize = errors.New("size cannot be negative")
errHashNotMultihash = errors.New("hash is not a valid multihash") errHashNotMultihash = errors.New("hash is not a valid multihash")
errHashTooShort = errors.New("hash digest is too short") errHashTooShort = errors.New("hash digest is too short")
errDuplicatePath = errors.New("duplicate path")
) )
// ValidatePath checks that a file path conforms to manifest path invariants: // ValidatePath checks that a file path conforms to manifest path invariants:
@@ -65,7 +64,7 @@ func ValidatePath(p string) error {
return fmt.Errorf("path %q %w", p, errPathAbsolute) return fmt.Errorf("path %q %w", p, errPathAbsolute)
} }
for seg := range strings.SplitSeq(p, "/") { for _, seg := range strings.Split(p, "/") {
if seg == "" { if seg == "" {
return fmt.Errorf("path %q %w", p, errPathEmptySegment) return fmt.Errorf("path %q %w", p, errPathEmptySegment)
} }
@@ -116,7 +115,6 @@ type FileHashProgress struct {
type Builder struct { type Builder struct {
mu sync.Mutex mu sync.Mutex
files []*MFFilePath files []*MFFilePath
paths map[string]bool // the path of each entry in files
createdAt time.Time createdAt time.Time
includeTimestamps bool includeTimestamps bool
signingOptions *SigningOptions signingOptions *SigningOptions
@@ -127,7 +125,6 @@ type Builder struct {
func NewBuilder() *Builder { func NewBuilder() *Builder {
return &Builder{ return &Builder{
files: make([]*MFFilePath, 0), files: make([]*MFFilePath, 0),
paths: make(map[string]bool),
createdAt: time.Now(), createdAt: time.Now(),
} }
} }
@@ -141,7 +138,6 @@ func (b *Builder) SetSeed(seed string) {
} }
// AddFile reads file content from reader, computes hashes, and adds to manifest. // AddFile reads file content from reader, computes hashes, and adds to manifest.
// A path already added is refused once the file is read.
// Only mode's permission bits (mode.Perm()) are recorded; 0 records none. // Only mode's permission bits (mode.Perm()) are recorded; 0 records none.
// Progress updates are sent to the progress channel (if non-nil) without blocking. // Progress updates are sent to the progress channel (if non-nil) without blocking.
// Returns the number of bytes read. // Returns the number of bytes read.
@@ -208,7 +204,11 @@ func (b *Builder) AddFile(
Mode: uint32(mode.Perm()), Mode: uint32(mode.Perm()),
} }
return totalRead, b.addEntry(entry) b.mu.Lock()
b.files = append(b.files, entry)
b.mu.Unlock()
return totalRead, nil
} }
// sendFileHashProgress sends a progress update without blocking. // sendFileHashProgress sends a progress update without blocking.
@@ -234,9 +234,8 @@ func (b *Builder) FileCount() int {
// AddFileWithHash adds a file entry with a pre-computed hash. // AddFileWithHash adds a file entry with a pre-computed hash.
// This is useful when the hash is already known (e.g., from an existing manifest). // This is useful when the hash is already known (e.g., from an existing manifest).
// Only mode's permission bits (mode.Perm()) are recorded; 0 records none. // Only mode's permission bits (mode.Perm()) are recorded; 0 records none.
// Returns an error if path is invalid or already added, size is negative, // Returns an error if path is invalid, size is negative, or hash is not a
// or hash is not a multihash with a digest of at least 32 bytes, as long // multihash with a digest of at least 32 bytes, as long as SHA-256's.
// as SHA-256's.
func (b *Builder) AddFileWithHash( func (b *Builder) AddFileWithHash(
path RelFilePath, path RelFilePath,
size FileSize, size FileSize,
@@ -246,7 +245,7 @@ func (b *Builder) AddFileWithHash(
) error { ) error {
err := ValidatePath(string(path)) err := ValidatePath(string(path))
if err != nil { if err != nil {
return err return fmt.Errorf("add file: %w", err)
} }
if size < 0 { if size < 0 {
@@ -278,7 +277,11 @@ func (b *Builder) AddFileWithHash(
Mode: uint32(mode.Perm()), Mode: uint32(mode.Perm()),
} }
return b.addEntry(entry) b.mu.Lock()
b.files = append(b.files, entry)
b.mu.Unlock()
return nil
} }
// SetIncludeTimestamps controls whether the manifest includes a createdAt timestamp. // SetIncludeTimestamps controls whether the manifest includes a createdAt timestamp.
@@ -329,33 +332,20 @@ func (b *Builder) Build(ctx context.Context, w io.Writer) error {
// Generate outer wrapper // Generate outer wrapper
err := m.generateOuter(ctx) err := m.generateOuter(ctx)
if err != nil { if err != nil {
return err return fmt.Errorf("build: generate outer: %w", err)
} }
// Generate final output // Generate final output
err = m.generate(ctx) err = m.generate(ctx)
if err != nil { if err != nil {
return err return fmt.Errorf("build: generate: %w", err)
} }
// Write to output // Write to output
_, err = w.Write(m.output.Bytes()) _, err = w.Write(m.output.Bytes())
if err != nil {
return err return fmt.Errorf("build: write output: %w", err)
} }
// addEntry adds entry to the manifest unless an entry with its path is
// already there.
func (b *Builder) addEntry(entry *MFFilePath) error {
b.mu.Lock()
defer b.mu.Unlock()
if b.paths[entry.GetPath()] {
return fmt.Errorf("%w %q", errDuplicatePath, entry.GetPath())
}
b.paths[entry.GetPath()] = true
b.files = append(b.files, entry)
return nil return nil
} }
mfer/builder_test.go
-26
View File
@@ -125,32 +125,6 @@ func TestBuilderAddFileWithHashRejectsBadHashes(t *testing.T) {
} }
} }
// TestBuilderRefusesPathAlreadyAdded adds a path, then adds it again with
// AddFile and with AddFileWithHash. Each must refuse it, naming it, and
// keep the one entry already added.
func TestBuilderRefusesPathAlreadyAdded(t *testing.T) {
t.Parallel()
hash, err := multihash.Encode(make([]byte, sha256.Size), multihash.SHA2_256)
require.NoError(t, err)
b := NewBuilder()
require.NoError(t, b.AddFileWithHash("dir/a.txt", 4, ModTime{}, 0, hash))
content := []byte("data")
_, err = b.AddFile(
"dir/a.txt", FileSize(len(content)), ModTime{}, 0, bytes.NewReader(content), nil,
)
require.ErrorIs(t, err, errDuplicatePath)
require.EqualError(t, err, `duplicate path "dir/a.txt"`)
err = b.AddFileWithHash("dir/a.txt", 4, ModTime{}, 0, hash)
require.ErrorIs(t, err, errDuplicatePath)
require.EqualError(t, err, `duplicate path "dir/a.txt"`)
assert.Equal(t, 1, b.FileCount())
}
func TestBuilderBuild(t *testing.T) { func TestBuilderBuild(t *testing.T) {
t.Parallel() t.Parallel()
mfer/checker.go
+13 -7
View File
@@ -15,6 +15,7 @@ import (
) )
var ( var (
errNoSigningPubKey = errors.New("manifest has no signing public key")
errManifestPathEmpty = errors.New("manifest path cannot be empty") errManifestPathEmpty = errors.New("manifest path cannot be empty")
errBasePathEmpty = errors.New("base path cannot be empty") errBasePathEmpty = errors.New("base path cannot be empty")
) )
@@ -172,14 +173,8 @@ func (c *Checker) IsSigned() bool {
return len(c.signature) > 0 return len(c.signature) > 0
} }
// Signer returns the fingerprint of the key that made the manifest's // Signer returns the signer fingerprint if the manifest is signed, nil otherwise.
// signature, which loading the manifest checked, or nil if the manifest is
// not signed.
func (c *Checker) Signer() []byte { func (c *Checker) Signer() []byte {
if !c.IsSigned() {
return nil
}
return c.signer return c.signer
} }
@@ -189,6 +184,17 @@ func (c *Checker) SigningPubKey() []byte {
return c.signingPubKey return c.signingPubKey
} }
// ExtractEmbeddedSigningKeyFP imports the manifest's embedded public key into a
// temporary keyring and extracts its fingerprint. This validates the key and
// returns its actual fingerprint from the key material itself.
func (c *Checker) ExtractEmbeddedSigningKeyFP(ctx context.Context) (string, error) {
if len(c.signingPubKey) == 0 {
return "", errNoSigningPubKey
}
return gpgExtractPubKeyFingerprint(ctx, c.signingPubKey)
}
// Check verifies all files against the manifest. // Check verifies all files against the manifest.
// Results are sent to the results channel as files are checked. // Results are sent to the results channel as files are checked.
// Progress updates are sent to the progress channel approximately once per second. // Progress updates are sent to the progress channel approximately once per second.
mfer/constants.go
+1 -8
View File
@@ -8,17 +8,10 @@ const (
ReleaseDate = "2025-12-17" ReleaseDate = "2025-12-17"
// MaxDecompressedSize is the maximum allowed size of decompressed manifest // MaxDecompressedSize is the maximum allowed size of decompressed manifest
// data (256 MiB). This prevents decompression bombs from consuming excessive // data (256 MB). This prevents decompression bombs from consuming excessive
// memory. // memory.
MaxDecompressedSize int64 = 256 * 1024 * 1024 MaxDecompressedSize int64 = 256 * 1024 * 1024
// MaxManifestSize is the largest manifest file mfer reads (258 MiB).
// zstd's worst case grows data it cannot compress by 1/256, so an inner
// message of MaxDecompressedSize compresses to at most 257 MiB; the
// last MiB is room for the signature, the signing key and the other
// outer fields.
MaxManifestSize = MaxDecompressedSize + MaxDecompressedSize/256 + 1<<20
// zstdWindowSize is the zstd window zstd.SpeedBestCompression gives mfer's writer. // zstdWindowSize is the zstd window zstd.SpeedBestCompression gives mfer's writer.
zstdWindowSize = 8 << 20 zstdWindowSize = 8 << 20
mfer/deserialize.go
+28 -59
View File
@@ -7,8 +7,8 @@ import (
"errors" "errors"
"fmt" "fmt"
"io" "io"
"strings"
"github.com/google/uuid"
"github.com/klauspost/compress/zstd" "github.com/klauspost/compress/zstd"
"github.com/spf13/afero" "github.com/spf13/afero"
"google.golang.org/protobuf/encoding/protowire" "google.golang.org/protobuf/encoding/protowire"
@@ -19,26 +19,29 @@ import (
var ( var (
errInvalidUUIDLength = errors.New("invalid UUID length") errInvalidUUIDLength = errors.New("invalid UUID length")
errInvalidUUIDFormat = errors.New("invalid UUID format")
errUnknownVersion = errors.New("unknown version") errUnknownVersion = errors.New("unknown version")
errUnknownCompression = errors.New("unknown compression type") errUnknownCompression = errors.New("unknown compression type")
errCompressedHashWrong = errors.New("compressed data hash mismatch") errCompressedHashWrong = errors.New("compressed data hash mismatch")
errSignatureNoPubKey = errors.New("signature present but no public key") errSignatureNoPubKey = errors.New("signature present but no public key")
errDecompressedTooLarge = errors.New("decompressed data exceeds maximum allowed size") errDecompressedTooLarge = errors.New("decompressed data exceeds maximum allowed size")
errManifestTooLarge = errors.New("file exceeds maximum allowed size")
errUUIDMismatch = errors.New("outer and inner UUID mismatch") errUUIDMismatch = errors.New("outer and inner UUID mismatch")
errInvalidFileFormat = errors.New("invalid file format") errInvalidFileFormat = errors.New("invalid file format")
errInvalidManifestPath = errors.New("invalid file entry") errInvalidManifestPath = errors.New("manifest contains invalid path")
errDecodedTooLarge = errors.New("too much memory needed") errDecodedTooLarge = errors.New(
errSignerNotSigningKey = errors.New( "manifest would take too much memory to decode")
"signer is not the fingerprint of the key that made the signature")
) )
// validateUUID checks that the byte slice is the 16 bytes of a binary UUID. // validateUUID checks that the byte slice is a valid UUID (16 bytes, parseable).
// Any 16 bytes are one, so the length is all there is to check.
func validateUUID(data []byte) error { func validateUUID(data []byte) error {
if len(data) != uuidLength { if len(data) != uuidLength {
return errInvalidUUIDLength return errInvalidUUIDLength
} }
// Try to parse as UUID to validate format
_, err := uuid.FromBytes(data)
if err != nil {
return errInvalidUUIDFormat
}
return nil return nil
} }
@@ -57,22 +60,20 @@ func (m *manifest) validateOuterHeader() error {
// Validate outer UUID before any decompression // Validate outer UUID before any decompression
err := validateUUID(m.pbOuter.GetUuid()) err := validateUUID(m.pbOuter.GetUuid())
if err != nil { if err != nil {
return fmt.Errorf("outer message: %w", err) return fmt.Errorf("outer UUID invalid: %w", err)
} }
return nil return nil
} }
// verifyOuterIntegrity checks the hash of the compressed payload and, if a // verifyOuterIntegrity checks the hash of the compressed payload and,
// signature is present, verifies it against the embedded public key, which // if a signature is present, verifies it against the embedded public key.
// must be one key, and checks that the signer field is that key's
// fingerprint.
func (m *manifest) verifyOuterIntegrity() error { func (m *manifest) verifyOuterIntegrity() error {
h := sha256.New() h := sha256.New()
_, err := h.Write(m.pbOuter.GetInnerMessage()) _, err := h.Write(m.pbOuter.GetInnerMessage())
if err != nil { if err != nil {
return fmt.Errorf("hash inner message: %w", err) return fmt.Errorf("deserialize: hash write: %w", err)
} }
sha256Hash := h.Sum(nil) sha256Hash := h.Sum(nil)
@@ -90,23 +91,20 @@ func (m *manifest) verifyOuterIntegrity() error {
sigString, err := m.signatureString() sigString, err := m.signatureString()
if err != nil { if err != nil {
return fmt.Errorf("build signature string: %w", err) return fmt.Errorf(
"failed to generate signature string for verification: %w", err,
)
} }
// Loading a manifest takes no context; gpgTimeout still bounds gpg. // Loading a manifest takes no context; gpgTimeout still bounds gpg.
signingKey, err := gpgVerify( err = gpgVerify(
context.Background(), context.Background(),
[]byte(sigString), []byte(sigString),
m.pbOuter.GetSignature(), m.pbOuter.GetSignature(),
m.pbOuter.GetSigningPubKey(), m.pbOuter.GetSigningPubKey(),
) )
if err != nil { if err != nil {
return err return fmt.Errorf("signature verification failed: %w", err)
}
if !strings.EqualFold(string(m.pbOuter.GetSigner()), signingKey) {
return fmt.Errorf("%w: signer %q, signing key %s",
errSignerNotSigningKey, m.pbOuter.GetSigner(), signingKey)
} }
log.Infof("signature verified successfully") log.Infof("signature verified successfully")
@@ -132,7 +130,7 @@ func (m *manifest) decompressInner() ([]byte, error) {
zstd.WithDecodeBuffersBelow(0), zstd.WithDecodeBuffersBelow(0),
zstd.WithDecoderMaxWindow(zstdWindowSize)) zstd.WithDecoderMaxWindow(zstdWindowSize))
if err != nil { if err != nil {
return nil, fmt.Errorf("create decompressor: %w", err) return nil, fmt.Errorf("deserialize: zstd reader: %w", err)
} }
defer zr.Close() defer zr.Close()
@@ -147,7 +145,7 @@ func (m *manifest) decompressInner() ([]byte, error) {
dat, err := io.ReadAll(limitedReader) dat, err := io.ReadAll(limitedReader)
if err != nil { if err != nil {
return nil, fmt.Errorf("decompress inner message: %w", err) return nil, fmt.Errorf("deserialize: decompress: %w", err)
} }
if int64(len(dat)) >= MaxDecompressedSize { if int64(len(dat)) >= MaxDecompressedSize {
@@ -263,7 +261,7 @@ func (m *manifest) deserializeInner() error {
err = checkDecodedSize(dat) err = checkDecodedSize(dat)
if err != nil { if err != nil {
return fmt.Errorf("unmarshal inner message: %w", err) return fmt.Errorf("deserialize: unmarshal inner: %w", err)
} }
// Deserialize inner message // Deserialize inner message
@@ -272,17 +270,13 @@ func (m *manifest) deserializeInner() error {
// Unknown fields would cost memory; mfer never writes a loaded manifest out. // Unknown fields would cost memory; mfer never writes a loaded manifest out.
err = proto.UnmarshalOptions{DiscardUnknown: true}.Unmarshal(dat, m.pbInner) err = proto.UnmarshalOptions{DiscardUnknown: true}.Unmarshal(dat, m.pbInner)
if err != nil { if err != nil {
return fmt.Errorf("unmarshal inner message: %w", err) return fmt.Errorf("deserialize: unmarshal inner: %w", err)
}
if m.pbInner.GetVersion() != MFFile_VERSION_ONE {
return errUnknownVersion
} }
// Validate inner UUID // Validate inner UUID
err = validateUUID(m.pbInner.GetUuid()) err = validateUUID(m.pbInner.GetUuid())
if err != nil { if err != nil {
return fmt.Errorf("inner message: %w", err) return fmt.Errorf("inner UUID invalid: %w", err)
} }
// Verify UUIDs match // Verify UUIDs match
@@ -295,21 +289,12 @@ func (m *manifest) deserializeInner() error {
// extract path tomorrow — acts on a traversal or absolute path from an // extract path tomorrow — acts on a traversal or absolute path from an
// untrusted .mf. Reject loudly on the first offender rather than // untrusted .mf. Reject loudly on the first offender rather than
// dropping entries, which would let a hostile manifest hide files from a // dropping entries, which would let a hostile manifest hide files from a
// check. A path listed twice is refused too: check would check the one // check.
// file against both entries.
seen := make(map[string]bool, len(m.pbInner.GetFiles()))
for _, f := range m.pbInner.GetFiles() { for _, f := range m.pbInner.GetFiles() {
err = ValidatePath(f.GetPath()) err = ValidatePath(f.GetPath())
if err != nil { if err != nil {
return fmt.Errorf("%w: %w", errInvalidManifestPath, err) return fmt.Errorf("%w: %w", errInvalidManifestPath, err)
} }
if seen[f.GetPath()] {
return fmt.Errorf("%w %q", errDuplicatePath, f.GetPath())
}
seen[f.GetPath()] = true
} }
log.Infof("loaded manifest with %d files", len(m.pbInner.GetFiles())) log.Infof("loaded manifest with %d files", len(m.pbInner.GetFiles()))
@@ -329,14 +314,13 @@ func validateMagic(dat []byte) bool {
return bytes.Equal(got, expected) return bytes.Equal(got, expected)
} }
// NewManifestFromReader reads a manifest from an io.Reader. It refuses a // NewManifestFromReader reads a manifest from an io.Reader.
// manifest larger than MaxManifestSize, reading at most one byte past it.
// //
//nolint:revive // unexported-return: exporting manifest is owner question 13 //nolint:revive // unexported-return: exporting manifest is owner question 13
func NewManifestFromReader(input io.Reader) (*manifest, error) { func NewManifestFromReader(input io.Reader) (*manifest, error) {
m := &manifest{} m := &manifest{}
dat, err := readAtMost(input, MaxManifestSize) dat, err := io.ReadAll(input)
if err != nil { if err != nil {
return nil, err return nil, err
} }
@@ -368,21 +352,6 @@ func NewManifestFromReader(input io.Reader) (*manifest, error) {
return m, nil return m, nil
} }
// readAtMost reads all of input, or refuses it with errManifestTooLarge
// once it passes maxSize bytes, after reading one byte past maxSize.
func readAtMost(input io.Reader, maxSize int64) ([]byte, error) {
dat, err := io.ReadAll(io.LimitReader(input, maxSize+1))
if err != nil {
return nil, err
}
if int64(len(dat)) > maxSize {
return nil, fmt.Errorf("%w of %d bytes", errManifestTooLarge, maxSize)
}
return dat, nil
}
// ManifestFromFileOptions configures NewManifestFromFile. // ManifestFromFileOptions configures NewManifestFromFile.
type ManifestFromFileOptions struct { type ManifestFromFileOptions struct {
// Path is the manifest file to read (required). // Path is the manifest file to read (required).
mfer/deserialize_path_test.go
+12 -64
View File
@@ -7,10 +7,11 @@ import (
"crypto/sha256" "crypto/sha256"
"fmt" "fmt"
"strconv" "strconv"
"strings"
"testing" "testing"
"time" "time"
"uuid"
"github.com/google/uuid"
"github.com/klauspost/compress/zstd" "github.com/klauspost/compress/zstd"
"github.com/multiformats/go-multihash" "github.com/multiformats/go-multihash"
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
@@ -91,7 +92,7 @@ func TestDeserializeRejectsInvalidEntryPaths(t *testing.T) {
t.Run(tt.name, func(t *testing.T) { t.Run(tt.name, func(t *testing.T) {
t.Parallel() t.Parallel()
id := uuid.NewV4() id := uuid.New()
data := wrapInner(t, id, craftInnerBytes(id, tt.path)) data := wrapInner(t, id, craftInnerBytes(id, tt.path))
_, err := NewManifestFromReader(bytes.NewReader(data)) _, err := NewManifestFromReader(bytes.NewReader(data))
@@ -117,61 +118,12 @@ func TestDeserializeRejectsInvalidEntryPaths(t *testing.T) {
} }
} }
// A manifest that lists a path twice is refused as it is loaded, naming the
// path. Paths are compared byte for byte: two that differ only in letter case
// load, and fetch refuses those itself. Each entry has a hash, as entries mfer
// writes do; entries of a path alone would take too much memory to decode.
func TestDeserializeRefusesPathListedTwice(t *testing.T) {
t.Parallel()
hash, err := multihash.Encode(make([]byte, sha256.Size), multihash.SHA2_256)
require.NoError(t, err)
tests := []struct {
name string
paths []string
refused bool
}{
{"same path twice", []string{"dir/a.txt", "other.txt", "dir/a.txt"}, true},
{"paths differing in letter case", []string{"dir/b.txt", "dir/B.txt"}, false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
id := uuid.NewV4()
inner := &MFFile{Version: MFFile_VERSION_ONE, Uuid: id[:]}
for _, p := range tt.paths {
inner.Files = append(inner.Files, &MFFilePath{
Path: p,
Hashes: []*MFFileChecksum{{MultiHash: hash}},
})
}
innerData, err := proto.Marshal(inner)
require.NoError(t, err)
m, err := NewManifestFromReader(bytes.NewReader(wrapInner(t, id, innerData)))
if tt.refused {
require.ErrorIs(t, err, errDuplicatePath)
require.EqualError(t, err, `duplicate path "dir/a.txt"`)
} else {
require.NoError(t, err)
assert.Len(t, m.Files(), len(tt.paths))
}
})
}
}
// Entries of a path, an empty hash, an empty MIME type and empty modification // Entries of a path, an empty hash, an empty MIME type and empty modification
// and change times are counted at 432 bytes each (176 + 112 + 16 + 64 + 64) // and change times are counted at 432 bytes each (176 + 112 + 16 + 64 + 64)
// and take 16 bytes plus the path to encode. A 37-character path makes that // and take 16 bytes plus the path to encode. A 37-character path makes that
// 53 bytes, about 8.2 times: refused, and leaving any one of the five // 53 bytes, about 8.2 times: refused, and leaving any one of the five
// uncounted, even the MIME type, brings it under 8. A 39-character path makes // uncounted, even the MIME type, brings it under 8. A 39-character path makes
// it 55 bytes, about 7.9 times: loaded. Each entry's path is its number, // it 55 bytes, about 7.9 times: loaded.
// padded with zeros to that length, since a manifest lists a path only once.
func TestDeserializeRefusesEntriesThatDecodeTooLarge(t *testing.T) { func TestDeserializeRefusesEntriesThatDecodeTooLarge(t *testing.T) {
t.Parallel() t.Parallel()
@@ -187,15 +139,8 @@ func TestDeserializeRefusesEntriesThatDecodeTooLarge(t *testing.T) {
t.Run(strconv.Itoa(tt.pathLen), func(t *testing.T) { t.Run(strconv.Itoa(tt.pathLen), func(t *testing.T) {
t.Parallel() t.Parallel()
id := uuid.NewV4()
inner := protowire.AppendTag(nil, 100, protowire.VarintType) // MFFile.version
inner = protowire.AppendVarint(inner, uint64(MFFile_VERSION_ONE))
inner = protowire.AppendTag(inner, 102, protowire.BytesType) // MFFile.uuid
inner = protowire.AppendBytes(inner, id[:])
for i := range 1000 {
entry := protowire.AppendTag(nil, 1, protowire.BytesType) // MFFilePath.path entry := protowire.AppendTag(nil, 1, protowire.BytesType) // MFFilePath.path
entry = protowire.AppendString(entry, fmt.Sprintf("%0*d", tt.pathLen, i)) entry = protowire.AppendString(entry, strings.Repeat("a", tt.pathLen))
entry = protowire.AppendTag(entry, 3, protowire.BytesType) // MFFilePath.hashes entry = protowire.AppendTag(entry, 3, protowire.BytesType) // MFFilePath.hashes
entry = protowire.AppendBytes(entry, nil) entry = protowire.AppendBytes(entry, nil)
entry = protowire.AppendTag(entry, 301, protowire.BytesType) // MFFilePath.mimeType entry = protowire.AppendTag(entry, 301, protowire.BytesType) // MFFilePath.mimeType
@@ -205,6 +150,11 @@ func TestDeserializeRefusesEntriesThatDecodeTooLarge(t *testing.T) {
entry = protowire.AppendTag(entry, 303, protowire.BytesType) // MFFilePath.ctime entry = protowire.AppendTag(entry, 303, protowire.BytesType) // MFFilePath.ctime
entry = protowire.AppendBytes(entry, nil) entry = protowire.AppendBytes(entry, nil)
id := uuid.New()
inner := protowire.AppendTag(nil, 102, protowire.BytesType) // MFFile.uuid
inner = protowire.AppendBytes(inner, id[:])
for range 1000 {
inner = protowire.AppendTag(inner, 101, protowire.BytesType) // MFFile.files inner = protowire.AppendTag(inner, 101, protowire.BytesType) // MFFile.files
inner = protowire.AppendBytes(inner, entry) inner = protowire.AppendBytes(inner, entry)
} }
@@ -231,10 +181,8 @@ func TestDeserializeDropsUnknownFields(t *testing.T) {
entry = protowire.AppendString(entry, "a") entry = protowire.AppendString(entry, "a")
entry = append(entry, unknown...) entry = append(entry, unknown...)
id := uuid.NewV4() id := uuid.New()
inner := protowire.AppendTag(nil, 100, protowire.VarintType) // MFFile.version inner := protowire.AppendTag(nil, 101, protowire.BytesType) // MFFile.files
inner = protowire.AppendVarint(inner, uint64(MFFile_VERSION_ONE))
inner = protowire.AppendTag(inner, 101, protowire.BytesType) // MFFile.files
inner = protowire.AppendBytes(inner, entry) inner = protowire.AppendBytes(inner, entry)
inner = protowire.AppendTag(inner, 102, protowire.BytesType) // MFFile.uuid inner = protowire.AppendTag(inner, 102, protowire.BytesType) // MFFile.uuid
inner = protowire.AppendBytes(inner, id[:]) inner = protowire.AppendBytes(inner, id[:])
mfer/deserialize_test.go
-54
View File
@@ -1,54 +0,0 @@
//nolint:testpackage // white-box tests exercise unexported internals
package mfer
import (
"bytes"
"testing"
"uuid"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"google.golang.org/protobuf/proto"
)
// An inner message whose version is not VERSION_ONE, whether version 0 or a
// later one, is refused with the same error as an outer message's.
func TestDeserializeRefusesUnknownInnerVersion(t *testing.T) {
t.Parallel()
for _, version := range []MFFile_Version{MFFile_VERSION_NONE, MFFile_VERSION_ONE + 1} {
t.Run(version.String(), func(t *testing.T) {
t.Parallel()
id := uuid.NewV4()
inner, err := proto.Marshal(&MFFile{Version: version, Uuid: id[:]})
require.NoError(t, err)
_, err = NewManifestFromReader(bytes.NewReader(wrapInner(t, id, inner)))
require.ErrorIs(t, err, errUnknownVersion)
})
}
}
// TestReadAtMost gives readAtMost exactly its maximum, which it must
// return whole, and twice its maximum, which it must refuse after reading
// one byte past the maximum, and no more. NewManifestFromReader reads
// through it with MaxManifestSize; the test uses 64 KiB, since reading
// MaxManifestSize under the race detector takes gigabytes of memory.
func TestReadAtMost(t *testing.T) {
t.Parallel()
const maxSize = 64 << 10
dat, err := readAtMost(bytes.NewReader(make([]byte, maxSize)), maxSize)
require.NoError(t, err)
assert.Len(t, dat, maxSize)
input := bytes.NewReader(make([]byte, 2*maxSize))
_, err = readAtMost(input, maxSize)
require.ErrorIs(t, err, errManifestTooLarge)
require.EqualError(t, err,
"file exceeds maximum allowed size of 65536 bytes")
assert.Equal(t, maxSize-1, input.Len(), "bytes left unread")
}
mfer/errmsg_test.go
+7 -11
View File
@@ -74,18 +74,14 @@ func TestValidatePathMessagesVerbatim(t *testing.T) {
} }
} }
// TestSerializeInnerNotSetMessagesVerbatim pins the messages generate and // TestSerializeInternalErrorMessagesVerbatim pins the two distinct
// generateOuter return when the inner message is missing. // "internal error" messages, which differ between generate and
func TestSerializeInnerNotSetMessagesVerbatim(t *testing.T) { // generateOuter and have always done so.
func TestSerializeInternalErrorMessagesVerbatim(t *testing.T) {
t.Parallel() t.Parallel()
m := &manifest{} m := &manifest{}
require.EqualError(t, m.generate(context.Background()),
err := m.generate(context.Background()) "internal error: pbInner not set")
require.ErrorIs(t, err, errInnerNotSet) require.EqualError(t, m.generateOuter(context.Background()), "internal error")
require.EqualError(t, err, "inner message not set")
err = m.generateOuter(context.Background())
require.ErrorIs(t, err, errInternal)
require.EqualError(t, err, "inner message not set")
} }
mfer/gpg.go
+96 -145
View File
@@ -41,26 +41,16 @@ const (
// fields in a gpg fingerprint record (the fingerprint is field 10). // fields in a gpg fingerprint record (the fingerprint is field 10).
gpgFingerprintMinFields = 10 gpgFingerprintMinFields = 10
// gpgStatusPrefix starts each status line gpg writes to the file
// descriptor named by --status-fd.
gpgStatusPrefix = "[GNUPG:]"
// gpg option names used from more than one call site. // gpg option names used from more than one call site.
gpgOptArmor = "--armor" gpgOptArmor = "--armor"
gpgOptHomedir = "--homedir" gpgOptHomedir = "--homedir"
gpgOptStatusFD = "--status-fd"
gpgOptVerify = "--verify" gpgOptVerify = "--verify"
) )
var ( var (
errGPGKeyNotFound = errors.New("GPG key not found") errGPGKeyNotFound = errors.New("gpg key not found")
errFingerprintNotFound = errors.New("fingerprint not found for key") errFingerprintNotFound = errors.New("fingerprint not found for key")
errSigningKeyCount = errors.New( errImportedFPRNotFound = errors.New("fingerprint not found in imported key")
"embedded public key block must hold exactly one key")
errNotOneGoodSignature = errors.New(
"gpg did not report exactly one good signature")
errSigningKeyNotReported = errors.New(
"gpg did not report the key that made the signature")
) )
// GPGKeyID represents a GPG key identifier (fingerprint or key ID). // GPGKeyID represents a GPG key identifier (fingerprint or key ID).
@@ -88,9 +78,8 @@ func gpgArgs(opts []string, positional ...string) []string {
} }
// runGPG runs the gpg binary in batch mode with the given arguments and // runGPG runs the gpg binary in batch mode with the given arguments and
// optional stdin, returning captured stdout and stderr. If gpg fails, the // optional stdin, returning captured stdout and stderr. gpg is killed when
// error ends with what gpg wrote to stderr. gpg is killed when ctx ends or // ctx ends or gpgTimeout passes, whichever comes first.
// gpgTimeout passes, whichever comes first.
func runGPG( func runGPG(
ctx context.Context, stdin io.Reader, args ...string, ctx context.Context, stdin io.Reader, args ...string,
) (*bytes.Buffer, *bytes.Buffer, error) { ) (*bytes.Buffer, *bytes.Buffer, error) {
@@ -126,32 +115,17 @@ func runGPG(
// "signal: killed"; return the reason instead. // "signal: killed"; return the reason instead.
err = ctx.Err() err = ctx.Err()
if errors.Is(err, context.DeadlineExceeded) { if errors.Is(err, context.DeadlineExceeded) {
err = fmt.Errorf("timed out: %w", err) err = fmt.Errorf("gpg timed out: %w", err)
} }
} }
if err != nil {
err = withStderr(err, &stderr)
}
return &stdout, &stderr, err return &stdout, &stderr, err
} }
// withStderr returns err followed by what gpg wrote to stderr, or err alone
// when gpg wrote nothing.
func withStderr(err error, stderr *bytes.Buffer) error {
messages := strings.TrimSpace(stderr.String())
if messages == "" {
return err
}
return fmt.Errorf("%w: %s", err, messages)
}
// parseFingerprint extracts the first fingerprint from gpg --with-colons // parseFingerprint extracts the first fingerprint from gpg --with-colons
// output, or returns ok=false if none is present. // output, or returns ok=false if none is present.
func parseFingerprint(colonOutput string) (string, bool) { func parseFingerprint(colonOutput string) (string, bool) {
for line := range strings.SplitSeq(colonOutput, "\n") { for _, line := range strings.Split(colonOutput, "\n") {
fields := strings.Split(line, ":") fields := strings.Split(line, ":")
if len(fields) >= gpgFingerprintMinFields && if len(fields) >= gpgFingerprintMinFields &&
fields[0] == gpgFingerprintField { fields[0] == gpgFingerprintField {
@@ -162,77 +136,29 @@ func parseFingerprint(colonOutput string) (string, bool) {
return "", false return "", false
} }
// parseStatusLine returns the arguments of the status line for keyword in // gpgSign creates a detached signature of the data using the specified key.
// gpg --status-fd output, or ok=false unless there is exactly one such line // Returns the armored detached signature.
// and it has arguments. func gpgSign(ctx context.Context, data []byte, keyID GPGKeyID) ([]byte, error) {
func parseStatusLine(statusOutput, keyword string) ([]string, bool) {
var found [][]string
for line := range strings.SplitSeq(statusOutput, "\n") {
fields := strings.Fields(line)
if len(fields) > 2 && fields[0] == gpgStatusPrefix && fields[1] == keyword {
found = append(found, fields[2:])
}
}
if len(found) != 1 {
return nil, false
}
return found[0], true
}
// gpgSign creates an armored detached signature of data with the key gpg
// picks for keyID, and returns it with the fingerprint of the key that made
// it, which is a subkey's when gpg signed with a subkey.
func gpgSign(
ctx context.Context, data []byte, keyID GPGKeyID,
) ([]byte, string, error) {
tmpDir, err := os.MkdirTemp("", "mfer-gpg-sign-*")
if err != nil {
return nil, "", err
}
defer func() { _ = os.RemoveAll(tmpDir) }()
sigFile := filepath.Join(tmpDir, "signature.asc")
// The signature goes to sigFile, so --status-fd 1 can send gpg's status
// lines to stdout; its messages go to stderr.
stdout, stderr, err := runGPG(ctx, bytes.NewReader(data), stdout, stderr, err := runGPG(ctx, bytes.NewReader(data),
"--detach-sign", "--detach-sign",
gpgOptArmor, gpgOptArmor,
"--output", sigFile,
gpgOptStatusFD, "1",
"--local-user", string(keyID), "--local-user", string(keyID),
) )
if err != nil { if err != nil {
return nil, "", fmt.Errorf("gpg sign: %w", err) return nil, fmt.Errorf("gpg sign failed: %w: %s", err, stderr.String())
} }
// The last argument of SIG_CREATED is the fingerprint of the key that return stdout.Bytes(), nil
// made the signature.
created, ok := parseStatusLine(stdout.String(), "SIG_CREATED")
if !ok {
return nil, "", withStderr(errSigningKeyNotReported, stderr)
}
sig, err := os.ReadFile(sigFile) //nolint:gosec // G304: inside tmpDir, made above
if err != nil {
return nil, "", err
}
return sig, created[len(created)-1], nil
} }
// gpgExportPublicKey exports the public key for the specified key ID. // gpgExportPublicKey exports the public key for the specified key ID.
// Returns the armored public key. // Returns the armored public key.
func gpgExportPublicKey(ctx context.Context, keyID GPGKeyID) ([]byte, error) { func gpgExportPublicKey(ctx context.Context, keyID GPGKeyID) ([]byte, error) {
stdout, _, err := runGPG(ctx, nil, stdout, stderr, err := runGPG(ctx, nil,
gpgArgs([]string{"--export", gpgOptArmor}, string(keyID))..., gpgArgs([]string{"--export", gpgOptArmor}, string(keyID))...,
) )
if err != nil { if err != nil {
return nil, fmt.Errorf("gpg export: %w", err) return nil, fmt.Errorf("gpg export failed: %w: %s", err, stderr.String())
} }
if stdout.Len() == 0 { if stdout.Len() == 0 {
@@ -244,11 +170,13 @@ func gpgExportPublicKey(ctx context.Context, keyID GPGKeyID) ([]byte, error) {
// gpgGetKeyFingerprint gets the full fingerprint for a key ID. // gpgGetKeyFingerprint gets the full fingerprint for a key ID.
func gpgGetKeyFingerprint(ctx context.Context, keyID GPGKeyID) ([]byte, error) { func gpgGetKeyFingerprint(ctx context.Context, keyID GPGKeyID) ([]byte, error) {
stdout, _, err := runGPG(ctx, nil, stdout, stderr, err := runGPG(ctx, nil,
gpgArgs([]string{"--with-colons", "--fingerprint"}, string(keyID))..., gpgArgs([]string{"--with-colons", "--fingerprint"}, string(keyID))...,
) )
if err != nil { if err != nil {
return nil, fmt.Errorf("gpg fingerprint lookup: %w", err) return nil, fmt.Errorf(
"gpg fingerprint lookup failed: %w: %s", err, stderr.String(),
)
} }
fpr, ok := parseFingerprint(stdout.String()) fpr, ok := parseFingerprint(stdout.String())
@@ -259,44 +187,14 @@ func gpgGetKeyFingerprint(ctx context.Context, keyID GPGKeyID) ([]byte, error) {
return []byte(fpr), nil return []byte(fpr), nil
} }
// gpgImportOneKey imports the public key block in pubKeyFile into the // gpgExtractPubKeyFingerprint imports a public key into a temporary keyring
// keyring in gpgHome. The block must hold exactly one primary key. // and extracts its fingerprint. This verifies the key is valid and returns
func gpgImportOneKey(ctx context.Context, gpgHome, pubKeyFile string) error { // the actual fingerprint from the key material.
// --status-fd 1 sends gpg's status lines to stdout, which importing func gpgExtractPubKeyFingerprint(ctx context.Context, pubKey []byte) (string, error) {
// otherwise leaves empty; its messages go to stderr.
importStdout, _, err := runGPG(ctx, nil,
gpgArgs([]string{gpgOptHomedir, gpgHome, gpgOptStatusFD, "1", "--import"},
pubKeyFile)...,
)
if err != nil {
return fmt.Errorf("gpg import: %w", err)
}
// The first argument of IMPORT_RES counts the primary keys gpg read
// from the block, those it then skipped (one with no user ID, for
// example) included.
result, ok := parseStatusLine(importStdout.String(), "IMPORT_RES")
if !ok {
return fmt.Errorf("%w, gpg reported no count", errSigningKeyCount)
}
if result[0] != "1" {
return fmt.Errorf("%w, found %s", errSigningKeyCount, result[0])
}
return nil
}
// gpgVerify verifies a detached signature against data using the provided
// public key, imported into a temporary keyring, and returns the
// fingerprint of the primary key that made the signature. The public key
// must hold exactly one primary key, so that a good signature can come
// from no other key.
func gpgVerify(ctx context.Context, data, signature, pubKey []byte) (string, error) {
// Create temporary directory for GPG operations // Create temporary directory for GPG operations
tmpDir, err := os.MkdirTemp("", "mfer-gpg-verify-*") tmpDir, err := os.MkdirTemp("", "mfer-gpg-fingerprint-*")
if err != nil { if err != nil {
return "", err return "", fmt.Errorf("failed to create temp dir: %w", err)
} }
defer func() { _ = os.RemoveAll(tmpDir) }() defer func() { _ = os.RemoveAll(tmpDir) }()
@@ -304,7 +202,7 @@ func gpgVerify(ctx context.Context, data, signature, pubKey []byte) (string, err
// Set restrictive permissions // Set restrictive permissions
err = os.Chmod(tmpDir, privateDirPerms) err = os.Chmod(tmpDir, privateDirPerms)
if err != nil { if err != nil {
return "", err return "", fmt.Errorf("failed to set temp dir permissions: %w", err)
} }
// Write public key to temp file // Write public key to temp file
@@ -312,7 +210,62 @@ func gpgVerify(ctx context.Context, data, signature, pubKey []byte) (string, err
err = os.WriteFile(pubKeyFile, pubKey, privateFilePerms) err = os.WriteFile(pubKeyFile, pubKey, privateFilePerms)
if err != nil { if err != nil {
return "", err return "", fmt.Errorf("failed to write public key: %w", err)
}
// Import the public key into the temporary keyring
_, importStderr, err := runGPG(ctx, nil,
gpgArgs([]string{gpgOptHomedir, tmpDir, "--import"}, pubKeyFile)...,
)
if err != nil {
return "", fmt.Errorf(
"failed to import public key: %w: %s", err, importStderr.String(),
)
}
// List keys to get fingerprint
listStdout, listStderr, err := runGPG(ctx, nil,
"--homedir", tmpDir,
"--with-colons",
"--fingerprint",
)
if err != nil {
return "", fmt.Errorf(
"failed to list keys: %w: %s", err, listStderr.String(),
)
}
fpr, ok := parseFingerprint(listStdout.String())
if !ok {
return "", errImportedFPRNotFound
}
return fpr, nil
}
// gpgVerify verifies a detached signature against data using the provided public key.
// It creates a temporary keyring to import the public key for verification.
func gpgVerify(ctx context.Context, data, signature, pubKey []byte) error {
// Create temporary directory for GPG operations
tmpDir, err := os.MkdirTemp("", "mfer-gpg-verify-*")
if err != nil {
return fmt.Errorf("failed to create temp dir: %w", err)
}
defer func() { _ = os.RemoveAll(tmpDir) }()
// Set restrictive permissions
err = os.Chmod(tmpDir, privateDirPerms)
if err != nil {
return fmt.Errorf("failed to set temp dir permissions: %w", err)
}
// Write public key to temp file
pubKeyFile := filepath.Join(tmpDir, "pubkey.asc")
err = os.WriteFile(pubKeyFile, pubKey, privateFilePerms)
if err != nil {
return fmt.Errorf("failed to write public key: %w", err)
} }
// Write signature to temp file // Write signature to temp file
@@ -320,7 +273,7 @@ func gpgVerify(ctx context.Context, data, signature, pubKey []byte) (string, err
err = os.WriteFile(sigFile, signature, privateFilePerms) err = os.WriteFile(sigFile, signature, privateFilePerms)
if err != nil { if err != nil {
return "", err return fmt.Errorf("failed to write signature: %w", err)
} }
// Write data to temp file // Write data to temp file
@@ -328,31 +281,29 @@ func gpgVerify(ctx context.Context, data, signature, pubKey []byte) (string, err
err = os.WriteFile(dataFile, data, privateFilePerms) err = os.WriteFile(dataFile, data, privateFilePerms)
if err != nil { if err != nil {
return "", err return fmt.Errorf("failed to write data: %w", err)
} }
err = gpgImportOneKey(ctx, tmpDir, pubKeyFile) // Import the public key into the temporary keyring
_, importStderr, err := runGPG(ctx, nil,
gpgArgs([]string{gpgOptHomedir, tmpDir, "--import"}, pubKeyFile)...,
)
if err != nil { if err != nil {
return "", err return fmt.Errorf(
"failed to import public key: %w: %s", err, importStderr.String(),
)
} }
// --status-fd 1 sends gpg's status lines to stdout, which verifying a // Verify the signature
// detached signature otherwise leaves empty; its messages go to stderr. _, verifyStderr, err := runGPG(ctx, nil,
verifyStdout, _, err := runGPG(ctx, nil, gpgArgs([]string{gpgOptHomedir, tmpDir, gpgOptVerify},
gpgArgs([]string{gpgOptHomedir, tmpDir, gpgOptStatusFD, "1", gpgOptVerify},
sigFile, dataFile)..., sigFile, dataFile)...,
) )
if err != nil { if err != nil {
return "", fmt.Errorf("gpg verify: %w", err) return fmt.Errorf(
"signature verification failed: %w: %s", err, verifyStderr.String(),
)
} }
// gpg writes a VALIDSIG line for each good signature. Its first return nil
// argument is the fingerprint of the key that made the signature,
// which may be a subkey; its last is that of the primary key.
valid, ok := parseStatusLine(verifyStdout.String(), "VALIDSIG")
if !ok {
return "", errNotOneGoodSignature
}
return valid[len(valid)-1], nil
} }
mfer/gpg_test.go
+39 -254
View File
@@ -8,7 +8,6 @@ import (
"os" "os"
"os/exec" "os/exec"
"path/filepath" "path/filepath"
"slices"
"strconv" "strconv"
"strings" "strings"
"syscall" "syscall"
@@ -18,7 +17,6 @@ import (
"github.com/spf13/afero" "github.com/spf13/afero"
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require" "github.com/stretchr/testify/require"
"google.golang.org/protobuf/proto"
) )
// testGPGEnv sets up a temporary GPG home directory with a test key. // testGPGEnv sets up a temporary GPG home directory with a test key.
@@ -37,18 +35,39 @@ func testGPGEnv(t *testing.T) (GPGKeyID, string) {
// Create temporary GPG home directory (0700 by default) // Create temporary GPG home directory (0700 by default)
gpgHome := t.TempDir() gpgHome := t.TempDir()
genTestKey(t, gpgHome, testKeyParams) // Generate a test key with no passphrase
keyParams := `%no-protection
Key-Type: RSA
Key-Length: 2048
Name-Real: MFER Test Key
Name-Email: test@mfer.test
Expire-Date: 0
%commit
`
paramsFile := filepath.Join(gpgHome, "key-params")
require.NoError(t, os.WriteFile(paramsFile, []byte(keyParams), 0o600))
ctx, cancel := context.WithTimeout(context.Background(), gpgTimeout) ctx, cancel := context.WithTimeout(context.Background(), gpgTimeout)
defer cancel() defer cancel()
// Get the key fingerprint //nolint:gosec // paramsFile is a test-controlled path inside t.TempDir()
cmd := exec.CommandContext(ctx, "gpg", cmd := exec.CommandContext(ctx, "gpg",
"--batch", "--gen-key", paramsFile)
cmd.Env = append(os.Environ(), "GNUPGHOME="+gpgHome)
output, err := cmd.CombinedOutput()
if err != nil {
t.Skipf("failed to generate test GPG key: %v: %s", err, output)
}
// Get the key fingerprint
cmd = exec.CommandContext(ctx, "gpg",
"--list-keys", "--with-colons", "test@mfer.test") "--list-keys", "--with-colons", "test@mfer.test")
cmd.Env = append(os.Environ(), "GNUPGHOME="+gpgHome) cmd.Env = append(os.Environ(), "GNUPGHOME="+gpgHome)
output, err := cmd.Output() output, err = cmd.Output()
if err != nil { if err != nil {
t.Fatalf("failed to list test key: %v", err) t.Fatalf("failed to list test key: %v", err)
} }
@@ -56,7 +75,7 @@ func testGPGEnv(t *testing.T) (GPGKeyID, string) {
// Parse fingerprint from output // Parse fingerprint from output
var keyID string var keyID string
for line := range strings.SplitSeq(string(output), "\n") { for _, line := range strings.Split(string(output), "\n") {
fields := strings.Split(line, ":") fields := strings.Split(line, ":")
if len(fields) >= gpgFingerprintMinFields && if len(fields) >= gpgFingerprintMinFields &&
fields[0] == gpgFingerprintField { fields[0] == gpgFingerprintField {
@@ -73,79 +92,13 @@ func testGPGEnv(t *testing.T) (GPGKeyID, string) {
return GPGKeyID(keyID), gpgHome return GPGKeyID(keyID), gpgHome
} }
// testKeyParams are the gpg key generation parameters of an RSA key that
// signs and does not expire.
const testKeyParams = "Key-Type: RSA\nKey-Length: 2048\nExpire-Date: 0\n"
// genTestKey generates a key with no passphrase for
// "MFER Test Key <test@mfer.test>" from the gpg key generation parameters
// keyParams in gpgHome, which may already hold one.
func genTestKey(t *testing.T, gpgHome, keyParams string) {
t.Helper()
params := "%no-protection\n" + keyParams +
"Name-Real: MFER Test Key\nName-Email: test@mfer.test\n%commit\n"
paramsFile := filepath.Join(gpgHome, "key-params")
require.NoError(t, os.WriteFile(paramsFile, []byte(params), 0o600))
ctx, cancel := context.WithTimeout(context.Background(), gpgTimeout)
defer cancel()
//nolint:gosec // paramsFile is a test-controlled path inside t.TempDir()
cmd := exec.CommandContext(ctx, "gpg",
"--batch", "--gen-key", paramsFile)
cmd.Env = append(os.Environ(), "GNUPGHOME="+gpgHome)
output, err := cmd.CombinedOutput()
if err != nil {
t.Skipf("failed to generate test GPG key: %v: %s", err, output)
}
}
// signedTestManifest returns a manifest of one file signed with keyID.
func signedTestManifest(t *testing.T, keyID GPGKeyID) []byte {
t.Helper()
b := NewBuilder()
b.SetSigningOptions(&SigningOptions{KeyID: keyID})
content := []byte("signed file content")
_, err := b.AddFile("test.txt", FileSize(len(content)), ModTime{}, 0,
bytes.NewReader(content), nil)
require.NoError(t, err)
var buf bytes.Buffer
require.NoError(t, b.Build(context.Background(), &buf))
return buf.Bytes()
}
// rewriteOuter returns manifest with its outer message changed by edit.
// A signature stays good as long as edit leaves the UUID and hash alone.
func rewriteOuter(t *testing.T, manifest []byte, edit func(*MFFileOuter)) []byte {
t.Helper()
outer := new(MFFileOuter)
require.NoError(t, proto.Unmarshal(manifest[len(MAGIC):], outer))
edit(outer)
data, err := proto.Marshal(outer)
require.NoError(t, err)
return append([]byte(MAGIC), data...)
}
func TestGPGSign(t *testing.T) { func TestGPGSign(t *testing.T) {
keyID, gpgHome := testGPGEnv(t) keyID, gpgHome := testGPGEnv(t)
t.Setenv("GNUPGHOME", gpgHome) t.Setenv("GNUPGHOME", gpgHome)
data := []byte("test data to sign") data := []byte("test data to sign")
sig, signingKey, err := gpgSign(context.Background(), data, keyID) sig, err := gpgSign(context.Background(), data, keyID)
require.NoError(t, err) require.NoError(t, err)
assert.Equal(t, string(keyID), signingKey)
assert.NotEmpty(t, sig) assert.NotEmpty(t, sig)
assert.Contains(t, string(sig), "-----BEGIN PGP SIGNATURE-----") assert.Contains(t, string(sig), "-----BEGIN PGP SIGNATURE-----")
assert.Contains(t, string(sig), "-----END PGP SIGNATURE-----") assert.Contains(t, string(sig), "-----END PGP SIGNATURE-----")
@@ -210,18 +163,15 @@ func TestGPGOptionLikeKeyIDIsNotAnOption(t *testing.T) {
assert.NotContains(t, string(fpr), "gpg (GnuPG)") assert.NotContains(t, string(fpr), "gpg (GnuPG)")
} }
// TestGPGSignInvalidKey signs with a key that has no secret key in the
// keyring. The error must hold gpg's messages and none of its status lines.
func TestGPGSignInvalidKey(t *testing.T) { func TestGPGSignInvalidKey(t *testing.T) {
// Set up test environment (we need GNUPGHOME set) // Set up test environment (we need GNUPGHOME set)
_, gpgHome := testGPGEnv(t) _, gpgHome := testGPGEnv(t)
t.Setenv("GNUPGHOME", gpgHome) t.Setenv("GNUPGHOME", gpgHome)
data := []byte("test data") data := []byte("test data")
_, _, err := gpgSign(context.Background(), data, _, err := gpgSign(context.Background(), data,
GPGKeyID("NONEXISTENT_KEY_ID_12345")) GPGKeyID("NONEXISTENT_KEY_ID_12345"))
require.Error(t, err) assert.Error(t, err)
assert.NotContains(t, err.Error(), gpgStatusPrefix)
} }
func TestBuilderWithSigning(t *testing.T) { func TestBuilderWithSigning(t *testing.T) {
@@ -309,16 +259,15 @@ func TestGPGVerify(t *testing.T) {
t.Setenv("GNUPGHOME", gpgHome) t.Setenv("GNUPGHOME", gpgHome)
data := []byte("test data to sign and verify") data := []byte("test data to sign and verify")
sig, _, err := gpgSign(context.Background(), data, keyID) sig, err := gpgSign(context.Background(), data, keyID)
require.NoError(t, err) require.NoError(t, err)
pubKey, err := gpgExportPublicKey(context.Background(), keyID) pubKey, err := gpgExportPublicKey(context.Background(), keyID)
require.NoError(t, err) require.NoError(t, err)
// Verify the signature; it names the key that made it // Verify the signature
signingKey, err := gpgVerify(context.Background(), data, sig, pubKey) err = gpgVerify(context.Background(), data, sig, pubKey)
require.NoError(t, err) require.NoError(t, err)
assert.Equal(t, string(keyID), signingKey)
} }
func TestGPGVerifyInvalidSignature(t *testing.T) { func TestGPGVerifyInvalidSignature(t *testing.T) {
@@ -326,7 +275,7 @@ func TestGPGVerifyInvalidSignature(t *testing.T) {
t.Setenv("GNUPGHOME", gpgHome) t.Setenv("GNUPGHOME", gpgHome)
data := []byte("test data to sign") data := []byte("test data to sign")
sig, _, err := gpgSign(context.Background(), data, keyID) sig, err := gpgSign(context.Background(), data, keyID)
require.NoError(t, err) require.NoError(t, err)
pubKey, err := gpgExportPublicKey(context.Background(), keyID) pubKey, err := gpgExportPublicKey(context.Background(), keyID)
@@ -334,7 +283,7 @@ func TestGPGVerifyInvalidSignature(t *testing.T) {
// Try to verify with different data - should fail // Try to verify with different data - should fail
wrongData := []byte("different data") wrongData := []byte("different data")
_, err = gpgVerify(context.Background(), wrongData, sig, pubKey) err = gpgVerify(context.Background(), wrongData, sig, pubKey)
assert.Error(t, err) assert.Error(t, err)
} }
@@ -343,12 +292,12 @@ func TestGPGVerifyBadPublicKey(t *testing.T) {
t.Setenv("GNUPGHOME", gpgHome) t.Setenv("GNUPGHOME", gpgHome)
data := []byte("test data") data := []byte("test data")
sig, _, err := gpgSign(context.Background(), data, keyID) sig, err := gpgSign(context.Background(), data, keyID)
require.NoError(t, err) require.NoError(t, err)
// Try to verify with invalid public key - should fail // Try to verify with invalid public key - should fail
badPubKey := []byte("not a valid public key") badPubKey := []byte("not a valid public key")
_, err = gpgVerify(context.Background(), data, sig, badPubKey) err = gpgVerify(context.Background(), data, sig, badPubKey)
assert.Error(t, err) assert.Error(t, err)
} }
@@ -419,144 +368,6 @@ func TestManifestTamperedSignatureFails(t *testing.T) {
assert.Error(t, err) assert.Error(t, err)
} }
// TestManifestRefusesSecondEmbeddedKey loads a manifest whose embedded
// public key block holds another key before the key that signed it.
// Loading must refuse it, although the signature is good and the signer
// field names the key that made it.
func TestManifestRefusesSecondEmbeddedKey(t *testing.T) {
otherKey, otherHome := testGPGEnv(t)
t.Setenv("GNUPGHOME", otherHome)
otherPubKey, err := gpgExportPublicKey(context.Background(), otherKey)
require.NoError(t, err)
keyID, gpgHome := testGPGEnv(t)
t.Setenv("GNUPGHOME", gpgHome)
manifest := rewriteOuter(t, signedTestManifest(t, keyID),
func(outer *MFFileOuter) {
outer.SigningPubKey = slices.Concat(otherPubKey, outer.GetSigningPubKey())
})
_, err = NewManifestFromReader(bytes.NewReader(manifest))
require.ErrorIs(t, err, errSigningKeyCount)
}
// TestManifestRefusesSecondEmbeddedKeyWithoutUserID loads a manifest whose
// embedded public key block holds, before the key that signed it, another
// key with its user ID removed, which gpg skips on import. Loading must
// refuse it: the block holds two keys.
func TestManifestRefusesSecondEmbeddedKeyWithoutUserID(t *testing.T) {
otherKey, otherHome := testGPGEnv(t)
t.Setenv("GNUPGHOME", otherHome)
// Keeping only the user IDs that match "nobody" exports none.
otherPubKey, _, err := runGPG(context.Background(), nil,
gpgArgs([]string{
"--export", gpgOptArmor, "--export-filter", "keep-uid=uid = nobody",
}, string(otherKey))...)
require.NoError(t, err)
keyID, gpgHome := testGPGEnv(t)
t.Setenv("GNUPGHOME", gpgHome)
manifest := rewriteOuter(t, signedTestManifest(t, keyID),
func(outer *MFFileOuter) {
outer.SigningPubKey = slices.Concat(
otherPubKey.Bytes(), outer.GetSigningPubKey())
})
_, err = NewManifestFromReader(bytes.NewReader(manifest))
require.ErrorIs(t, err, errSigningKeyCount)
}
// TestManifestRefusesTwoSignatures loads a manifest whose signature field
// holds its good signature twice. Loading must refuse it.
func TestManifestRefusesTwoSignatures(t *testing.T) {
keyID, gpgHome := testGPGEnv(t)
t.Setenv("GNUPGHOME", gpgHome)
manifest := rewriteOuter(t, signedTestManifest(t, keyID),
func(outer *MFFileOuter) {
outer.Signature = slices.Concat(
outer.GetSignature(), outer.GetSignature())
})
_, err := NewManifestFromReader(bytes.NewReader(manifest))
require.ErrorIs(t, err, errNotOneGoodSignature)
}
// TestManifestSignedWithSubkey signs with a key whose primary key can only
// certify, so gpg signs with its signing subkey. The manifest must load,
// with the primary key's fingerprint as signer.
func TestManifestSignedWithSubkey(t *testing.T) {
gpgHome := t.TempDir()
t.Setenv("GNUPGHOME", gpgHome)
genTestKey(t, gpgHome, "Key-Type: RSA\nKey-Length: 2048\nKey-Usage: cert\n"+
"Subkey-Type: RSA\nSubkey-Length: 2048\nSubkey-Usage: sign\n"+
"Expire-Date: 0\n")
primary, err := gpgGetKeyFingerprint(context.Background(), "test@mfer.test")
require.NoError(t, err)
m, err := NewManifestFromReader(bytes.NewReader(
signedTestManifest(t, GPGKeyID("test@mfer.test"))))
require.NoError(t, err)
assert.Equal(t, primary, m.pbOuter.GetSigner())
}
// TestManifestRefusesSignerOtherThanSigningKey loads a manifest whose
// signer field names a key other than the one that made the signature.
func TestManifestRefusesSignerOtherThanSigningKey(t *testing.T) {
keyID, gpgHome := testGPGEnv(t)
t.Setenv("GNUPGHOME", gpgHome)
manifest := rewriteOuter(t, signedTestManifest(t, keyID),
func(outer *MFFileOuter) {
outer.Signer = []byte(strings.Repeat("A", len(keyID)))
})
_, err := NewManifestFromReader(bytes.NewReader(manifest))
require.ErrorIs(t, err, errSignerNotSigningKey)
}
// TestBuilderSigningKeyIDMatchingTwoKeys signs with a key ID that two keys
// in the keyring match. The manifest must embed and name only the key that
// signed it, or loading refuses it.
func TestBuilderSigningKeyIDMatchingTwoKeys(t *testing.T) {
_, gpgHome := testGPGEnv(t)
genTestKey(t, gpgHome, testKeyParams)
t.Setenv("GNUPGHOME", gpgHome)
manifest := signedTestManifest(t, GPGKeyID("test@mfer.test"))
_, err := NewManifestFromReader(bytes.NewReader(manifest))
require.NoError(t, err)
}
// TestBuilderSigningUserIDWithExpiredFirstKey signs with a user ID whose
// first key in the keyring has expired. gpg signs with the other key for
// that user ID, and the manifest must name and embed that key.
func TestBuilderSigningUserIDWithExpiredFirstKey(t *testing.T) {
gpgHome := t.TempDir()
t.Setenv("GNUPGHOME", gpgHome)
// Made in 2020 and valid for one day.
genTestKey(t, gpgHome, "Key-Type: RSA\nKey-Length: 2048\n"+
"Creation-Date: 20200101T000000\nExpire-Date: 1d\n")
expired, err := gpgGetKeyFingerprint(context.Background(), "test@mfer.test")
require.NoError(t, err)
genTestKey(t, gpgHome, testKeyParams)
m, err := NewManifestFromReader(bytes.NewReader(
signedTestManifest(t, GPGKeyID("test@mfer.test"))))
require.NoError(t, err)
assert.NotEqual(t, expired, m.pbOuter.GetSigner())
}
func TestBuilderWithoutSigning(t *testing.T) { func TestBuilderWithoutSigning(t *testing.T) {
t.Parallel() t.Parallel()
@@ -603,42 +414,16 @@ func fakeGPGPath(t *testing.T, script string) string {
// TestGPGTimeoutKillsGPG puts a fake gpg that never finishes first on // TestGPGTimeoutKillsGPG puts a fake gpg that never finishes first on
// PATH and checks that a run past its deadline is killed and reported as // PATH and checks that a run past its deadline is killed and reported as
// a timeout of the named operation, instead of hanging. The fake gpg writes // a timeout of the named operation, instead of hanging.
// nothing to stderr, so the message ends with the timeout.
func TestGPGTimeoutKillsGPG(t *testing.T) { func TestGPGTimeoutKillsGPG(t *testing.T) {
t.Setenv("PATH", fakeGPGPath(t, "#!/bin/sh\nexec sleep 10\n")) t.Setenv("PATH", fakeGPGPath(t, "#!/bin/sh\nexec sleep 10\n"))
ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond) ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
defer cancel() defer cancel()
_, _, err := gpgSign(ctx, []byte("data"), GPGKeyID("any")) _, err := gpgSign(ctx, []byte("data"), GPGKeyID("any"))
require.ErrorIs(t, err, context.DeadlineExceeded) require.ErrorIs(t, err, context.DeadlineExceeded)
assert.EqualError(t, err, "gpg sign: timed out: context deadline exceeded") assert.Contains(t, err.Error(), "gpg sign failed: gpg timed out")
}
// TestGPGSignKeyNotReportedKeepsStderr puts a fake gpg first on PATH that
// exits cleanly without reporting the key that signed, and checks that what
// it wrote to stderr is in the message.
func TestGPGSignKeyNotReportedKeepsStderr(t *testing.T) {
t.Setenv("PATH", fakeGPGPath(t,
"#!/bin/sh\necho 'gpg: note from the fake gpg' >&2\n"))
_, _, err := gpgSign(context.Background(), []byte("data"), GPGKeyID("any"))
require.ErrorIs(t, err, errSigningKeyNotReported)
assert.EqualError(t, err,
"gpg did not report the key that made the signature: "+
"gpg: note from the fake gpg")
}
// TestGPGFailureKeepsStderr puts a fake gpg first on PATH that writes to
// stderr and exits non-zero, and checks that what it wrote ends the message.
func TestGPGFailureKeepsStderr(t *testing.T) {
t.Setenv("PATH", fakeGPGPath(t,
"#!/bin/sh\necho 'gpg: signing failed: No secret key' >&2\nexit 2\n"))
_, _, err := gpgSign(context.Background(), []byte("data"), GPGKeyID("any"))
assert.EqualError(t, err,
"gpg sign: exit status 2: gpg: signing failed: No secret key")
} }
// TestGPGCancelWhenChildHoldsOutput uses a fake gpg that runs sleep as a // TestGPGCancelWhenChildHoldsOutput uses a fake gpg that runs sleep as a
@@ -661,7 +446,7 @@ func TestGPGCancelWhenChildHoldsOutput(t *testing.T) {
signErr := make(chan error, 1) signErr := make(chan error, 1)
go func() { go func() {
_, _, err := gpgSign(ctx, []byte("data"), GPGKeyID("any")) _, err := gpgSign(ctx, []byte("data"), GPGKeyID("any"))
signErr <- err signErr <- err
}() }()
mfer/manifest.go
+2 -2
View File
@@ -10,7 +10,7 @@ import (
) )
var ( var (
errOuterNotSet = errors.New("outer message not set") errOuterNotSet = errors.New("pbOuter not set")
errUUIDNotSet = errors.New("UUID not set") errUUIDNotSet = errors.New("UUID not set")
errSHA256NotSet = errors.New("SHA256 hash not set") errSHA256NotSet = errors.New("SHA256 hash not set")
) )
@@ -65,7 +65,7 @@ func (m *manifest) signatureString() (string, error) {
mh, err := multihash.Encode(m.pbOuter.GetSha256(), multihash.SHA2_256) mh, err := multihash.Encode(m.pbOuter.GetSha256(), multihash.SHA2_256)
if err != nil { if err != nil {
return "", fmt.Errorf("encode multihash: %w", err) return "", fmt.Errorf("failed to encode multihash: %w", err)
} }
uuidStr := hex.EncodeToString(m.pbOuter.GetUuid()) uuidStr := hex.EncodeToString(m.pbOuter.GetUuid())
mfer/mf.pb.go
+1 -1
View File
@@ -1,6 +1,6 @@
// Code generated by protoc-gen-go. DO NOT EDIT. // Code generated by protoc-gen-go. DO NOT EDIT.
// versions: // versions:
// protoc-gen-go v1.36.12 // protoc-gen-go v1.36.11
// protoc v6.33.4 // protoc v6.33.4
// source: mf.proto // source: mf.proto
mfer/scanner.go
-15
View File
@@ -2,7 +2,6 @@ package mfer
import ( import (
"context" "context"
"fmt"
"io" "io"
"io/fs" "io/fs"
"os" "os"
@@ -80,7 +79,6 @@ type FileEntry struct {
type Scanner struct { type Scanner struct {
mu sync.RWMutex mu sync.RWMutex
files []*FileEntry files []*FileEntry
paths map[RelFilePath]AbsFilePath // the file at each path in files
totalBytes FileSize // cached sum of all file sizes totalBytes FileSize // cached sum of all file sizes
options *ScannerOptions options *ScannerOptions
fs afero.Fs fs afero.Fs
@@ -105,7 +103,6 @@ func NewScannerWithOptions(opts *ScannerOptions) *Scanner {
s := &Scanner{ s := &Scanner{
files: make([]*FileEntry, 0), files: make([]*FileEntry, 0),
paths: make(map[RelFilePath]AbsFilePath),
options: opts, options: opts,
fs: fs, fs: fs,
} }
@@ -481,18 +478,6 @@ func (s *Scanner) enumerateFileWithInfo(
} }
s.mu.Lock() s.mu.Lock()
// Each path is relative to the input path it was found under, so files
// under two input paths can share one.
first, ok := s.paths[entry.Path]
if ok {
s.mu.Unlock()
return fmt.Errorf("%w %q: %s and %s",
errDuplicatePath, entry.Path, first, entry.AbsPath)
}
s.paths[entry.Path] = entry.AbsPath
s.files = append(s.files, entry) s.files = append(s.files, entry)
s.totalBytes += entry.Size s.totalBytes += entry.Size
filesFound := FileCount(len(s.files)) filesFound := FileCount(len(s.files))
mfer/serialize.go
+20 -22
View File
@@ -8,8 +8,8 @@ import (
"fmt" "fmt"
"math" "math"
"time" "time"
"uuid"
"github.com/google/uuid"
"github.com/klauspost/compress/zstd" "github.com/klauspost/compress/zstd"
"google.golang.org/protobuf/proto" "google.golang.org/protobuf/proto"
) )
@@ -20,9 +20,11 @@ const MAGIC string = "ZNAVSRFG"
var ( var (
// errInnerNotSet is returned by generate when the inner manifest is // errInnerNotSet is returned by generate when the inner manifest is
// missing. // missing.
errInnerNotSet = errors.New("inner message not set") errInnerNotSet = errors.New("internal error: pbInner not set")
// errInternal is returned by generateOuter for the same condition. // errInternal is returned by generateOuter for the same condition.
errInternal = errors.New("inner message not set") // The two messages differ, and both are load-bearing for callers that
// match on text, so they are kept distinct.
errInternal = errors.New("internal error")
) )
// nanosecondsInt32 converts t's nanosecond component to int32. // nanosecondsInt32 converts t's nanosecond component to int32.
@@ -63,14 +65,14 @@ func (m *manifest) generate(ctx context.Context) error {
dat, err := proto.MarshalOptions{Deterministic: true}.Marshal(m.pbOuter) dat, err := proto.MarshalOptions{Deterministic: true}.Marshal(m.pbOuter)
if err != nil { if err != nil {
return fmt.Errorf("marshal outer message: %w", err) return fmt.Errorf("serialize: marshal outer: %w", err)
} }
m.output = bytes.NewBufferString(MAGIC) m.output = bytes.NewBufferString(MAGIC)
_, err = m.output.Write(dat) _, err = m.output.Write(dat)
if err != nil { if err != nil {
return fmt.Errorf("write outer message: %w", err) return fmt.Errorf("serialize: write output: %w", err)
} }
return nil return nil
@@ -86,14 +88,14 @@ func (m *manifest) generateOuter(ctx context.Context) error {
if len(m.fixedUUID) == uuidLength { if len(m.fixedUUID) == uuidLength {
copy(manifestUUID[:], m.fixedUUID) copy(manifestUUID[:], m.fixedUUID)
} else { } else {
manifestUUID = uuid.NewV4() manifestUUID = uuid.New()
} }
m.pbInner.Uuid = manifestUUID[:] m.pbInner.Uuid = manifestUUID[:]
innerData, err := proto.MarshalOptions{Deterministic: true}.Marshal(m.pbInner) innerData, err := proto.MarshalOptions{Deterministic: true}.Marshal(m.pbInner)
if err != nil { if err != nil {
return fmt.Errorf("marshal inner message: %w", err) return fmt.Errorf("serialize: marshal inner: %w", err)
} }
// Compress the inner data // Compress the inner data
@@ -101,12 +103,12 @@ func (m *manifest) generateOuter(ctx context.Context) error {
zw, err := zstd.NewWriter(idc, zstd.WithEncoderLevel(zstd.SpeedBestCompression)) zw, err := zstd.NewWriter(idc, zstd.WithEncoderLevel(zstd.SpeedBestCompression))
if err != nil { if err != nil {
return fmt.Errorf("create compressor: %w", err) return fmt.Errorf("serialize: create compressor: %w", err)
} }
_, err = zw.Write(innerData) _, err = zw.Write(innerData)
if err != nil { if err != nil {
return fmt.Errorf("compress inner message: %w", err) return fmt.Errorf("serialize: compress: %w", err)
} }
_ = zw.Close() _ = zw.Close()
@@ -118,7 +120,7 @@ func (m *manifest) generateOuter(ctx context.Context) error {
_, err = h.Write(compressedData) _, err = h.Write(compressedData)
if err != nil { if err != nil {
return fmt.Errorf("hash inner message: %w", err) return fmt.Errorf("serialize: hash write: %w", err)
} }
sha256Hash := h.Sum(nil) sha256Hash := h.Sum(nil)
@@ -141,34 +143,30 @@ func (m *manifest) generateOuter(ctx context.Context) error {
} }
// signOuter signs the outer message with the configured GPG key and // signOuter signs the outer message with the configured GPG key and
// embeds the signature, signer fingerprint, and public key. The signer // embeds the signature, signer fingerprint, and public key.
// and public key are those of the key gpg reports it signed with, so that
// a key ID matching more than one key cannot name or embed another key.
func (m *manifest) signOuter(ctx context.Context) error { func (m *manifest) signOuter(ctx context.Context) error {
sigString, err := m.signatureString() sigString, err := m.signatureString()
if err != nil { if err != nil {
return fmt.Errorf("build signature string: %w", err) return fmt.Errorf("failed to generate signature string: %w", err)
} }
sig, signingKey, err := gpgSign(ctx, []byte(sigString), m.signingOptions.KeyID) sig, err := gpgSign(ctx, []byte(sigString), m.signingOptions.KeyID)
if err != nil { if err != nil {
return err return fmt.Errorf("failed to sign manifest: %w", err)
} }
m.pbOuter.Signature = sig m.pbOuter.Signature = sig
// Listing the signing key, a subkey's included, puts its primary key's fingerprint, err := gpgGetKeyFingerprint(ctx, m.signingOptions.KeyID)
// fingerprint first.
fingerprint, err := gpgGetKeyFingerprint(ctx, GPGKeyID(signingKey))
if err != nil { if err != nil {
return err return fmt.Errorf("failed to get key fingerprint: %w", err)
} }
m.pbOuter.Signer = fingerprint m.pbOuter.Signer = fingerprint
pubKey, err := gpgExportPublicKey(ctx, GPGKeyID(fingerprint)) pubKey, err := gpgExportPublicKey(ctx, m.signingOptions.KeyID)
if err != nil { if err != nil {
return err return fmt.Errorf("failed to export public key: %w", err)
} }
m.pbOuter.SigningPubKey = pubKey m.pbOuter.SigningPubKey = pubKey
script/bootstrap
+5 -6
View File
@@ -22,15 +22,14 @@ YARN_VERSION="1.22.22"
# protoc v33.4, 2026-10-04, for script/generate. The sha256 of each # protoc v33.4, 2026-10-04, for script/generate. The sha256 of each
# platform's release archive is in ensure_protoc. # platform's release archive is in ensure_protoc.
PROTOC_VERSION="33.4" PROTOC_VERSION="33.4"
# gofumpt v0.12.0 for script/gofumpt, 2026-10-04, and protoc-gen-go # gofumpt v0.12.0 for script/gofumpt and protoc-gen-go v1.36.11 for
# v1.36.12 for script/generate, 2026-10-06: each is installed into bin/ # script/generate, 2026-10-04: each is installed into bin/ with
# with `go install`, pinned to the commit its release tag names. Those two # `go install`, pinned to the commit its release tag names. Those two
# scripts refuse any other version, so a new pin is changed there too. # scripts refuse any other version, so a new pin is changed there too.
# protoc-gen-go stays at the google.golang.org/protobuf version in go.mod.
GOFUMPT_VERSION="v0.12.0" GOFUMPT_VERSION="v0.12.0"
GOFUMPT_COMMIT="3e07e7e70ac93761d8e79ca0083a19e3d59f753d" GOFUMPT_COMMIT="3e07e7e70ac93761d8e79ca0083a19e3d59f753d"
PROTOC_GEN_GO_VERSION="v1.36.12" PROTOC_GEN_GO_VERSION="v1.36.11"
PROTOC_GEN_GO_COMMIT="cdd4c5f7406e82462949c7a65defa9f3029c162d" PROTOC_GEN_GO_COMMIT="96a179180f0ad6bba9b1e7b6e38d0affb0168e9a"
PKGMGR="" PKGMGR=""
SUDO="" SUDO=""
script/generate
+1 -1
View File
@@ -15,7 +15,7 @@ ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
# in the mf.pb.go header. # in the mf.pb.go header.
PROTOC_VERSION="33.4" PROTOC_VERSION="33.4"
PROTOC="$ROOT/bin/protoc/bin/protoc" PROTOC="$ROOT/bin/protoc/bin/protoc"
PROTOC_GEN_GO_VERSION="v1.36.12" PROTOC_GEN_GO_VERSION="v1.36.11"
PROTOC_GEN_GO="$ROOT/bin/protoc-gen-go" PROTOC_GEN_GO="$ROOT/bin/protoc-gen-go"
# sha256 <file>: print "<hash> <file>", with sha256sum, or with shasum # sha256 <file>: print "<hash> <file>", with sha256sum, or with shasum
script/vulncheck
-22
View File
@@ -1,22 +0,0 @@
#!/bin/sh
# script/vulncheck: report known vulnerabilities in the code mfer calls,
# with govulncheck, which reads the Go vulnerability database online.
# It runs as the vulncheck stage of the Dockerfile, on the same Go as the
# test phase, and this builds that stage alone, on the same terms as
# script/lint and script/test.
#
# script/check does not run it: the gate's result depends on this tree
# alone, and this one changes whenever a new advisory is published.
set -eu
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
main() {
cd "$ROOT"
docker build --no-cache \
--target vulncheck \
-t "$("$SCRIPT_DIR/projectname")-vulncheck" .
}
main "$@"