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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 XCTest
#if CRYPTO_IN_SWIFTPM && !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
import Crypto
#elseif !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
import CryptoKit
#else
import Crypto
#endif
struct Ed25519TestGroup: Codable {
let tests: [Ed25519TestVector]
let publicKey: Ed25519PublicKey
}
struct Ed25519PublicKey: Codable {
let pk: String
}
struct Ed25519TestVector: Codable {
let comment: String
let msg: String
let sig: String
let result: String
let flags: [String]
let tcId: Int
}
class Ed25519Tests: XCTestCase {
func testExample() throws {
let privateKey = Curve25519.Signing.PrivateKey()
let publicKey = privateKey.publicKey
let someData = "Some Data".data(using: .utf8)!
let signature = try orFail { try privateKey.signature(for: someData) }
XCTAssert(publicKey.isValidSignature(signature, for: someData))
}
func testSigningDiscontiguousData() throws {
let privateKey = Curve25519.Signing.PrivateKey()
let (someContiguousData, someDiscontiguousData) = Array("Some Data".utf8).asDataProtocols()
let signatureOnContiguous = try orFail { try privateKey.signature(for: someContiguousData) }
let signatureOnDiscontiguous = try orFail { try privateKey.signature(for: someDiscontiguousData) }
#if !(canImport(Darwin))
XCTAssertEqual(signatureOnContiguous, signatureOnDiscontiguous)
#endif
// This tests the 4 combinations.
let (contiguousSignature, discontiguousSignature) = Array(signatureOnContiguous).asDataProtocols()
XCTAssertTrue(privateKey.publicKey.isValidSignature(contiguousSignature, for: someContiguousData))
XCTAssertTrue(privateKey.publicKey.isValidSignature(discontiguousSignature, for: someContiguousData))
XCTAssertTrue(privateKey.publicKey.isValidSignature(contiguousSignature, for: someDiscontiguousData))
XCTAssertTrue(privateKey.publicKey.isValidSignature(discontiguousSignature, for: someDiscontiguousData))
}
func testRejectingInvalidSignaturesOnDiscontiguousData() throws {
let privateKey = Curve25519.Signing.PrivateKey()
let otherPrivateKey = Curve25519.Signing.PrivateKey()
let (someContiguousData, someDiscontiguousData) = Array("Some Data".utf8).asDataProtocols()
let signature = try orFail { try privateKey.signature(for: someContiguousData) }
// This tests the 4 combinations.
let (contiguousSignature, discontiguousSignature) = Array(signature).asDataProtocols()
XCTAssertFalse(otherPrivateKey.publicKey.isValidSignature(contiguousSignature, for: someContiguousData))
XCTAssertFalse(otherPrivateKey.publicKey.isValidSignature(discontiguousSignature, for: someContiguousData))
XCTAssertFalse(otherPrivateKey.publicKey.isValidSignature(contiguousSignature, for: someDiscontiguousData))
XCTAssertFalse(otherPrivateKey.publicKey.isValidSignature(discontiguousSignature, for: someDiscontiguousData))
}
func testSigningZeroRegionDataProtocol() throws {
let privateKey = Curve25519.Signing.PrivateKey()
let signature = try orFail { try privateKey.signature(for: DispatchData.empty) }
XCTAssert(privateKey.publicKey.isValidSignature(signature, for: DispatchData.empty))
// This signature should be invalid
XCTAssertFalse(privateKey.publicKey.isValidSignature(DispatchData.empty, for: DispatchData.empty))
}
func testWycheProof() throws {
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "ed25519_test",
testFunction: { (group: Ed25519TestGroup) in
try orFail { try testGroup(group: group) }
})
}
}
func testGroup(group: Ed25519TestGroup, file: StaticString = #file, line: UInt = #line) throws {
let keyBytes = try orFail { try Array(hexString: group.publicKey.pk) }
let key = try orFail { try Curve25519.Signing.PublicKey(rawRepresentation: keyBytes) }
for testVector in group.tests {
var isValid = false
do {
let sig = try Data(hexString: testVector.sig)
let msg: Data
if testVector.msg.count > 0 {
msg = try Data(hexString: testVector.msg)
} else {
msg = Data()
}
isValid = key.isValidSignature(sig, for: msg)
} catch {
XCTAssert(testVector.result == "invalid" || testVector.result == "acceptable", "Test ID: \(testVector.tcId) is valid, but failed \(error.localizedDescription).")
continue
}
switch testVector.result {
case "valid": XCTAssert(isValid, "Test vector is valid, but is rejected \(testVector.tcId)")
case "acceptable": do {
XCTAssert(isValid)
}
case "invalid": XCTAssert(!isValid, "Test ID: \(testVector.tcId) is valid, but failed.")
default:
XCTFail("Unhandled test vector")
}
}
}
}
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