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Canonical v2-schema `.golangci.yml`, golangci-lint pins bumped to v2.12.2 in `Dockerfile` and `script/bootstrap`, and the tree brought to `0 issues.` under it. Three behaviour deltas: `Cache.StoreVariant` takes a context (cancelled requests skip the accounting row, recovered by reconciliation); `MetadataStorage.Store` no longer leaks `.tmp-*.json` on Write/Close/Rename failure (dead-defer bug fix); the `signing_key` too-short error text gained a `value too short:` prefix. Eviction-loop context cancellation deferred to #102.
120 lines
3.6 KiB
Go
120 lines
3.6 KiB
Go
package signature_test
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import (
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"testing"
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"time"
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"sneak.berlin/go/pixa/internal/signature"
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)
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// goldenExpiresUnix is the fixed expiration timestamp used by all golden
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// vectors: 2024-01-01T00:00:00Z.
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const goldenExpiresUnix int64 = 1704067200
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// goldenSigningKey is the fixed signing key used by all golden vectors.
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const goldenSigningKey = "golden-test-key"
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type goldenVector struct {
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name string
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req signature.Request
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// wantSignature is the exact base64url (RFC 4648 URL-safe,
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// padded) HMAC-SHA256 signature for the request with Expires
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// set to goldenExpiresUnix.
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wantSignature string
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// wantSignedPath is the exact path returned by
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// GenerateSignedURL for the request. The signature and
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// expiration are returned separately by GenerateSignedURL and
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// are not embedded in the path.
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wantSignedPath string
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}
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// goldenVectors returns the known-answer vectors. The expected values
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// were computed once and are hardcoded here.
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func goldenVectors() []goldenVector {
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return []goldenVector{
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{
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name: "resized without query",
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req: signature.Request{
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SourceHost: testHost,
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SourcePath: testPath,
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SourceQuery: "",
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Width: 800,
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Height: 600,
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Format: testFormatWebP,
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},
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// Signed data: "cdn.example.com:/photos/cat.jpg::800:600:webp:1704067200"
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wantSignature: "x5PfPp8QSDo0cJT96od-AEgrQyOVLfqifH5sst61_-w=",
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wantSignedPath: testSignedPath,
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},
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{
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name: "resized with query string",
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req: signature.Request{
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SourceHost: testHost,
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SourcePath: testPath,
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SourceQuery: "token=abc&v=2",
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Width: 800,
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Height: 600,
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Format: testFormatWebP,
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},
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// Signed data:
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// "cdn.example.com:/photos/cat.jpg:token=abc&v=2:800:600:webp:1704067200"
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wantSignature: "394_Vf9TdQFkpQ3XKFDQSyxgqKq8N7mApf2S4QaHqyo=",
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wantSignedPath: "/v1/image/cdn.example.com/photos/cat.jpg" +
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"%3Ftoken=abc&v=2/800x600.webp",
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},
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{
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name: "original size without query",
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req: signature.Request{
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SourceHost: testHost,
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SourcePath: testPath,
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SourceQuery: "",
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Width: 0,
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Height: 0,
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Format: testFormatPNG,
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},
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// Signed data: "cdn.example.com:/photos/cat.jpg::0:0:png:1704067200"
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wantSignature: "7Be7oteeQwvnSPU4bchyQ4ZGYGsAGBKpeEtuQ02ox60=",
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wantSignedPath: "/v1/image/cdn.example.com/photos/cat.jpg/orig.png",
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},
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}
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}
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// TestSigner_GoldenVectors pins the exact HMAC-SHA256 signature output and
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// the exact generated signed URL path for fully-specified requests with a
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// hardcoded signing key.
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//
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// If any of these assertions fail, the signed byte format
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// ("host:path:query:width:height:format:expiration"), the base64url
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// encoding, or the signed URL layout has changed. Such a change breaks
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// every signature already issued to clients, so it must be made
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// deliberately: update these constants only as part of an intentional,
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// documented signature format migration.
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func TestSigner_GoldenVectors(t *testing.T) {
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t.Parallel()
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signer := signature.New(goldenSigningKey)
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for _, tt := range goldenVectors() {
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t.Run(tt.name, func(t *testing.T) {
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t.Parallel()
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signReq := tt.req
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signReq.Expires = time.Unix(goldenExpiresUnix, 0)
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gotSignature := signer.Sign(&signReq)
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if gotSignature != tt.wantSignature {
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t.Errorf("Sign() = %q, want %q (signed byte format changed?)",
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gotSignature, tt.wantSignature)
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}
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urlReq := tt.req
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gotPath, _, _ := signer.GenerateSignedURL(&urlReq, time.Hour)
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if gotPath != tt.wantSignedPath {
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t.Errorf("GenerateSignedURL() path = %q, want %q (signed URL layout changed?)",
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gotPath, tt.wantSignedPath)
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}
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})
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}
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}
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