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Add support for SHA256 fingerprints (#198) 

* Add SHA256

* Update tests

* Fix padding
This commit is contained in:
Max Goedjen 2021-01-17 16:16:38 -08:00 committed by GitHub
parent 0544287141
commit 4de805dd37
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 25 additions and 6 deletions
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10
SecretKit/Common/OpenSSH/OpenSSHKeyWriter.swift
View File

@ -19,7 +19,15 @@ public struct OpenSSHKeyWriter {
.joined(separator: " ")
}
public func openSSHFingerprint<SecretType: Secret>(secret: SecretType) -> String {
public func openSSHSHA256Fingerprint<SecretType: Secret>(secret: SecretType) -> String {
// OpenSSL format seems to strip the padding at the end.
let base64 = Data(SHA256.hash(data: data(secret: secret))).base64EncodedString()
let paddingRange = base64.index(base64.endIndex, offsetBy: -2)..<base64.endIndex
let cleaned = base64.replacingOccurrences(of: "=", with: "", range: paddingRange)
return "SHA256:\(cleaned)"
}
public func openSSHMD5Fingerprint<SecretType: Secret>(secret: SecretType) -> String {
Insecure.MD5.hash(data: data(secret: secret))
.compactMap { ("0" + String($0, radix: 16, uppercase: false)).suffix(2) }
.joined(separator: ":")

16
SecretKitTests/OpenSSHWriterTests.swift
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@ -6,8 +6,12 @@ class OpenSSHWriterTests: XCTestCase {
let writer = OpenSSHKeyWriter()
func testECDSA256Fingerprint() {
XCTAssertEqual(writer.openSSHFingerprint(secret: Constants.ecdsa256Secret), "dc:60:4d:ff:c2:d9:18:8b:2f:24:40:b5:7f:43:47:e5")
func testECDSA256MD5Fingerprint() {
XCTAssertEqual(writer.openSSHMD5Fingerprint(secret: Constants.ecdsa256Secret), "dc:60:4d:ff:c2:d9:18:8b:2f:24:40:b5:7f:43:47:e5")
}
func testECDSA256SHA256Fingerprint() {
XCTAssertEqual(writer.openSSHSHA256Fingerprint(secret: Constants.ecdsa256Secret), "SHA256:/VQFeGyM8qKA8rB6WGMuZZxZLJln2UgXLk3F0uTF650")
}
func testECDSA256PublicKey() {
@ -19,8 +23,12 @@ class OpenSSHWriterTests: XCTestCase {
XCTAssertEqual(writer.data(secret: Constants.ecdsa256Secret), Data(base64Encoded: "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBOVEjgAA5PHqRgwykjN5qM21uWCHFSY/Sqo5gkHAkn+e1MMQKHOLga7ucB9b3mif33MBid59GRK9GEPVlMiSQwo="))
}
func testECDSA384Fingerprint() {
XCTAssertEqual(writer.openSSHFingerprint(secret: Constants.ecdsa384Secret), "66:e0:66:d7:41:ed:19:8e:e2:20:df:ce:ac:7e:2b:6e")
func testECDSA384MD5Fingerprint() {
XCTAssertEqual(writer.openSSHMD5Fingerprint(secret: Constants.ecdsa384Secret), "66:e0:66:d7:41:ed:19:8e:e2:20:df:ce:ac:7e:2b:6e")
}
func testECDSA384SHA256Fingerprint() {
XCTAssertEqual(writer.openSSHSHA256Fingerprint(secret: Constants.ecdsa384Secret), "SHA256:GJUEymQNL9ymaMRRJCMGY4rWIJHu/Lm8Yhao/PAiz1I")
}
func testECDSA384PublicKey() {

5
Secretive/Views/SecretDetailView.swift
View File

@ -10,7 +10,10 @@ struct SecretDetailView<SecretType: Secret>: View {
var body: some View {
Form {
Section {
CopyableView(title: "Fingerprint", image: Image(systemName: "touchid"), text: keyWriter.openSSHFingerprint(secret: secret))
CopyableView(title: "SHA256 Fingerprint", image: Image(systemName: "touchid"), text: keyWriter.openSSHSHA256Fingerprint(secret: secret))
Spacer()
.frame(height: 20)
CopyableView(title: "MD5 Fingerprint", image: Image(systemName: "touchid"), text: keyWriter.openSSHMD5Fingerprint(secret: secret))
Spacer()
.frame(height: 20)
CopyableView(title: "Public Key", image: Image(systemName: "key"), text: keyString)