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|
//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftCrypto open source project
//
// Copyright (c) 2019-2020 Apple Inc. and the SwiftCrypto project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.md for the list of SwiftCrypto project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import Foundation
import XCTest
#if CRYPTO_IN_SWIFTPM && !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
// Skip tests that require @testable imports of CryptoKit.
#else
#if !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
@testable import CryptoKit
#else
@testable import Crypto
#endif
struct ECDSATestGroup: Codable {
let tests: [SignatureTestVector]
let publicKey: ECDSAKey
}
struct ECDSAKey: Codable {
let uncompressed: String
}
struct SignatureTestVector: Codable {
let comment: String
let msg: String
let sig: String
let result: String
let flags: [String]
let tcId: Int
}
class SignatureTests: XCTestCase {
let data = "Testing Signatures".data(using: String.Encoding.utf8)!
func testWycheproofP256DER() throws {
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp256r1_sha256_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P256.Signing.self, hashFunction: SHA256.self, deserializeSignature: P256.Signing.ECDSASignature.init(derRepresentation:)) }
})
}
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp256r1_sha512_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P256.Signing.self, hashFunction: SHA512.self, deserializeSignature: P256.Signing.ECDSASignature.init(derRepresentation:)) }
})
}
}
func testWycheproofP384DER() throws {
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp384r1_sha384_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P384.Signing.self, hashFunction: SHA384.self, deserializeSignature: P384.Signing.ECDSASignature.init(derRepresentation:)) }
})
}
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp384r1_sha512_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P384.Signing.self, hashFunction: SHA512.self, deserializeSignature: P384.Signing.ECDSASignature.init(derRepresentation:)) }
})
}
}
func testWycheproofP521DER() throws {
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp521r1_sha512_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P521.Signing.self, hashFunction: SHA512.self, deserializeSignature: P521.Signing.ECDSASignature.init(derRepresentation:)) }
})
}
}
func testWycheproofP256P1363() throws {
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp256r1_sha256_p1363_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P256.Signing.self, hashFunction: SHA256.self, deserializeSignature: P256.Signing.ECDSASignature.init(rawRepresentation:)) }
})
}
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp256r1_sha512_p1363_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P256.Signing.self, hashFunction: SHA512.self, deserializeSignature: P256.Signing.ECDSASignature.init(rawRepresentation:)) }
})
}
}
func testWycheproofP384P1363() throws {
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp384r1_sha384_p1363_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P384.Signing.self, hashFunction: SHA384.self, deserializeSignature: P384.Signing.ECDSASignature.init(rawRepresentation:)) }
})
}
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp384r1_sha512_p1363_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P384.Signing.self, hashFunction: SHA512.self, deserializeSignature: P384.Signing.ECDSASignature.init(rawRepresentation:)) }
})
}
}
func testWycheproofP521P1363() throws {
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ecdsa_secp521r1_sha512_p1363_test",
testFunction: { (group: ECDSATestGroup) in
try orFail { try testGroup(group: group, curve: P521.Signing.self, hashFunction: SHA512.self, deserializeSignature: P521.Signing.ECDSASignature.init(rawRepresentation:)) }
})
}
}
func testGroup<C: NISTSigning, HF: HashFunction>(group: ECDSATestGroup, curve: C.Type, hashFunction: HF.Type, deserializeSignature: (Data) throws -> C.ECDSASignature, file: StaticString = #file, line: UInt = #line) throws where C.ECDSASignature == C.PublicKey.Signature {
let keyBytes = try orFail(file: file, line: line) { try Array(hexString: group.publicKey.uncompressed) }
let key = try orFail(file: file, line: line) { try C.PublicKey(x963Representation: keyBytes) }
for testVector in group.tests {
if testVector.msg == "" {
continue
}
var isValid = false
do {
let sig = try Data(hexString: testVector.sig)
let msg = try Data(hexString: testVector.msg)
let digest = HF.hash(data: msg)
let signature = try deserializeSignature(sig)
isValid = key.isValidSignature(signature, for: digest)
} catch {
XCTAssert(testVector.result == "invalid" || testVector.result == "acceptable", "Test ID: \(testVector.tcId) is valid, but failed \(error.localizedDescription).", file: file, line: line)
continue
}
switch testVector.result {
case "valid": XCTAssert(isValid, "Test vector is valid, but is rejected \(testVector.tcId)", file: file, line: line)
case "acceptable": do {
XCTAssert(isValid, file: file, line: line)
}
case "invalid": XCTAssert(!isValid, "Test ID: \(testVector.tcId) is valid, but failed.", file: file, line: line)
default:
XCTFail("Unhandled test vector", file: file, line: line)
}
}
}
func testP256Usage() throws {
let signingKey = P256.Signing.PrivateKey()
let signature = try orFail { try signingKey.signature(for: data) }
XCTAssert(signingKey.publicKey.isValidSignature(signature, for: data))
}
func testP256Representations() throws {
let signingKey = P256.Signing.PrivateKey()
let signature = try orFail { try signingKey.signature(for: data) }
XCTAssertEqual(signature.composite.r + signature.composite.s, signature.rawRepresentation)
let signatureBytesFromPointer = signature.withUnsafeBytes { Data($0) }
XCTAssertEqual(signature.rawRepresentation, signatureBytesFromPointer)
let roundTrippedSignature = try orFail { try P256.Signing.ECDSASignature(derRepresentation: signature.derRepresentation) }
XCTAssertEqual(signature.rawRepresentation, roundTrippedSignature.rawRepresentation)
}
func testP384Representations() throws {
let signingKey = P384.Signing.PrivateKey()
let signature = try orFail { try signingKey.signature(for: data) }
XCTAssertEqual(signature.composite.r + signature.composite.s, signature.rawRepresentation)
let signatureBytesFromPointer = signature.withUnsafeBytes { Data($0) }
XCTAssertEqual(signature.rawRepresentation, signatureBytesFromPointer)
let roundTrippedSignature = try orFail { try P384.Signing.ECDSASignature(derRepresentation: signature.derRepresentation) }
XCTAssertEqual(signature.rawRepresentation, roundTrippedSignature.rawRepresentation)
}
func testP521Representations() throws {
let signingKey = P521.Signing.PrivateKey()
let signature = try orFail { try signingKey.signature(for: data) }
XCTAssertEqual(signature.composite.r + signature.composite.s, signature.rawRepresentation)
let signatureBytesFromPointer = signature.withUnsafeBytes { Data($0) }
XCTAssertEqual(signature.rawRepresentation, signatureBytesFromPointer)
let roundTrippedSignature = try orFail { try P521.Signing.ECDSASignature(derRepresentation: signature.derRepresentation) }
XCTAssertEqual(signature.rawRepresentation, roundTrippedSignature.rawRepresentation)
}
func testProperSignatureSizes() throws {
XCTAssertThrowsError(try P256.Signing.ECDSASignature(rawRepresentation: Array("hello".utf8))) { error in
guard case .some(.incorrectParameterSize) = error as? CryptoKitError else {
XCTFail("Incorrect error: \(error)")
return
}
}
XCTAssertThrowsError(try P384.Signing.ECDSASignature(rawRepresentation: Array("hello".utf8))) { error in
guard case .some(.incorrectParameterSize) = error as? CryptoKitError else {
XCTFail("Incorrect error: \(error)")
return
}
}
XCTAssertThrowsError(try P521.Signing.ECDSASignature(rawRepresentation: Array("hello".utf8))) { error in
guard case .some(.incorrectParameterSize) = error as? CryptoKitError else {
XCTFail("Incorrect error: \(error)")
return
}
}
}
func testP256SigningDiscontiguousData() throws {
let signingKey = P256.Signing.PrivateKey()
// We generate 4 signatures here, all of which should be identical. We validate them all, which means there is a lot of validating here:
// 8 in total.
let (contiguousData, discontiguousData) = Array(data).asDataProtocols()
let (contiguousContiguous, discontiguousContiguous) = try orFail { Array(try signingKey.signature(for: contiguousData).derRepresentation).asDataProtocols() }
let (contiguousDiscontiguous, discontiguousDiscontiguous) = try orFail { Array(try signingKey.signature(for: discontiguousData).derRepresentation).asDataProtocols() }
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: discontiguousData))
// While we're here, let's confirm that we can also reject this appropriately.
let anotherKey = P256.Signing.PrivateKey()
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: discontiguousData))
}
func testP384SigningDiscontiguousData() throws {
let signingKey = P384.Signing.PrivateKey()
// We generate 4 signatures here, all of which should be identical. We validate them all, which means there is a lot of validating here:
// 8 in total.
let (contiguousData, discontiguousData) = Array(data).asDataProtocols()
let (contiguousContiguous, discontiguousContiguous) = try orFail { Array(try signingKey.signature(for: contiguousData).derRepresentation).asDataProtocols() }
let (contiguousDiscontiguous, discontiguousDiscontiguous) = try orFail { Array(try signingKey.signature(for: discontiguousData).derRepresentation).asDataProtocols() }
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: discontiguousData))
// While we're here, let's confirm that we can also reject this appropriately.
let anotherKey = P384.Signing.PrivateKey()
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: discontiguousData))
}
func testP521SigningDiscontiguousData() throws {
let signingKey = P521.Signing.PrivateKey()
// We generate 4 signatures here, all of which should be identical. We validate them all, which means there is a lot of validating here:
// 8 in total.
let (contiguousData, discontiguousData) = Array(data).asDataProtocols()
let (contiguousContiguous, discontiguousContiguous) = try orFail { Array(try signingKey.signature(for: contiguousData).derRepresentation).asDataProtocols() }
let (contiguousDiscontiguous, discontiguousDiscontiguous) = try orFail { Array(try signingKey.signature(for: discontiguousData).derRepresentation).asDataProtocols() }
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: contiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: discontiguousData))
XCTAssertTrue(signingKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: discontiguousData))
// While we're here, let's confirm that we can also reject this appropriately.
let anotherKey = P521.Signing.PrivateKey()
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: contiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousContiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousContiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: contiguousDiscontiguous), for: discontiguousData))
XCTAssertFalse(anotherKey.publicKey.isValidSignature(try .init(derRepresentation: discontiguousDiscontiguous), for: discontiguousData))
}
func testCompressedKeys() throws {
let x963Positive = Data(base64Encoded: "A+QHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L")!
let key = try P256.Signing.PublicKey(compressedRepresentation: x963Positive)
XCTAssertEqual(
key.x963Representation.base64EncodedString(),
"BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7LE6xvfFkB4Y3VXoOpB/Kp6ngpf3Lce9hDMl7fqaDUfYE="
)
let x963Negative = Data(base64Encoded: "AuQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L")!
let negativeKey = try P256.Signing.PublicKey(compressedRepresentation: x963Negative)
XCTAssertEqual(
negativeKey.x963Representation.base64EncodedString(),
"BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L7FOQgqb+HnMqoXxW+A1WFYfWgI4jhCe8zaEgVl8rgn4="
)
let p384Positive = Data(base64Encoded: "AyEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNpw==")!
let p384Key = try P384.Signing.PublicKey(compressedRepresentation: p384Positive)
XCTAssertEqual(
p384Key.x963Representation.base64EncodedString(),
"BCEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNp22k0ZcxSL1Ljf19pe25Y6UgedrZf1sOLBVVDZxO36mxwUgPUqFp5/0nNmGMDdQeTQ=="
)
let p384Negative = Data(base64Encoded: "AiEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNpw==")!
let p384NegativeKey = try P384.Signing.PublicKey(compressedRepresentation: p384Negative)
XCTAssertEqual(
p384NegativeKey.x963Representation.base64EncodedString(),
"BCEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNp5JbLmjOt0K0cgKCWhJGnFrfhiUmgKTx0+qq8mOxIFZNPrfwrF6WGALYyZ508ivhsg=="
)
let p521Positive = Data(base64Encoded: "AwGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4Iw==")!
let p521Key = try P521.Signing.PublicKey(compressedRepresentation: p521Positive)
XCTAssertEqual(
p521Key.x963Representation.base64EncodedString(),
"BAGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4IwE8xEGqskayEkbPkQCGqSKfVYPZTkBdEs1ham1IXcqT4HSfoGGw98UwjQRiDPfIv0+vU6ocPbxURTdvwUSWPm72WQ=="
)
let p521Negative = Data(base64Encoded: "AgGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4Iw==")!
let p521NegativeKey = try P521.Signing.PublicKey(compressedRepresentation: p521Negative)
XCTAssertEqual(
p521NegativeKey.x963Representation.base64EncodedString(),
"BAGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4IwDDO75VTblN7bkwbv95Vt1gqnwmsb+i7TKelZK3ojVsH4tgX55PCDrPcvud8wg3QLBQrFXjwkOrusiQPrtpwZEJpg=="
)
// Check that the uncompressed key gets rejected
let uncompressedX963 = Data(base64Encoded: "BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7LE6xvfFkB4Y3VXoOpB/Kp6ngpf3Lce9hDMl7fqaDUfYE=")!
XCTAssertThrowsError(try P256.Signing.PublicKey(compressedRepresentation: uncompressedX963))
}
func testUncompressedKeys() throws {
let uncompressedX963 = Data(base64Encoded: "BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7LE6xvfFkB4Y3VXoOpB/Kp6ngpf3Lce9hDMl7fqaDUfYE=")!
let key = try P256.Signing.PublicKey(x963Representation: uncompressedX963)
XCTAssertEqual(
key.x963Representation.base64EncodedString(),
"BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7LE6xvfFkB4Y3VXoOpB/Kp6ngpf3Lce9hDMl7fqaDUfYE="
)
let compressedX963Positive = Data(base64Encoded: "A+QHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L")!
XCTAssertThrowsError(try P256.Signing.PublicKey(x963Representation: compressedX963Positive))
}
}
#endif // CRYPTO_IN_SWIFTPM
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