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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 ECDHTestGroup: Codable {
let curve: String
let tests: [ECDHTestVector]
}
struct ECDHTestVector: Codable {
let comment: String
let publicKey: String
let privateKey: String
let shared: String
let result: String
let tcId: Int
let flags: [String]
enum CodingKeys: String, CodingKey {
case publicKey = "public"
case privateKey = "private"
case comment
case shared
case result
case tcId
case flags
}
}
class X25519Tests: XCTestCase {
func testSerialization() throws {
let bobsKey = Curve25519.KeyAgreement.PrivateKey()
let privateKey = Curve25519.KeyAgreement.PrivateKey()
let keyData = privateKey.rawRepresentation
let recoveredKey = try orFail { try Curve25519.KeyAgreement.PrivateKey(rawRepresentation: keyData) }
let ss1 = try orFail { try privateKey.sharedSecretFromKeyAgreement(with: bobsKey.publicKey) }
let ss2 = try orFail { try recoveredKey.sharedSecretFromKeyAgreement(with: bobsKey.publicKey) }
XCTAssertEqual(ss1, ss2)
XCTAssertEqual(recoveredKey.rawRepresentation, keyData)
}
func testCompressedKeys() throws {
let x963Positive = Data(base64Encoded: "A+QHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L")!
let key = try P256.KeyAgreement.PublicKey(compressedRepresentation: x963Positive)
XCTAssertEqual(
key.x963Representation.base64EncodedString(),
"BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7LE6xvfFkB4Y3VXoOpB/Kp6ngpf3Lce9hDMl7fqaDUfYE="
)
let x963Negative = Data(base64Encoded: "AuQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L")!
let negativeKey = try P256.KeyAgreement.PublicKey(compressedRepresentation: x963Negative)
XCTAssertEqual(
negativeKey.x963Representation.base64EncodedString(),
"BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L7FOQgqb+HnMqoXxW+A1WFYfWgI4jhCe8zaEgVl8rgn4="
)
let p384Positive = Data(base64Encoded: "AyEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNpw==")!
let p384Key = try P384.KeyAgreement.PublicKey(compressedRepresentation: p384Positive)
XCTAssertEqual(
p384Key.x963Representation.base64EncodedString(),
"BCEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNp22k0ZcxSL1Ljf19pe25Y6UgedrZf1sOLBVVDZxO36mxwUgPUqFp5/0nNmGMDdQeTQ=="
)
let p384Negative = Data(base64Encoded: "AiEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNpw==")!
let p384NegativeKey = try P384.KeyAgreement.PublicKey(compressedRepresentation: p384Negative)
XCTAssertEqual(
p384NegativeKey.x963Representation.base64EncodedString(),
"BCEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNp5JbLmjOt0K0cgKCWhJGnFrfhiUmgKTx0+qq8mOxIFZNPrfwrF6WGALYyZ508ivhsg=="
)
let p521Positive = Data(base64Encoded: "AwGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4Iw==")!
let p521Key = try P521.KeyAgreement.PublicKey(compressedRepresentation: p521Positive)
XCTAssertEqual(
p521Key.x963Representation.base64EncodedString(),
"BAGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4IwE8xEGqskayEkbPkQCGqSKfVYPZTkBdEs1ham1IXcqT4HSfoGGw98UwjQRiDPfIv0+vU6ocPbxURTdvwUSWPm72WQ=="
)
let p521Negative = Data(base64Encoded: "AgGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4Iw==")!
let p521NegativeKey = try P521.KeyAgreement.PublicKey(compressedRepresentation: p521Negative)
XCTAssertEqual(
p521NegativeKey.x963Representation.base64EncodedString(),
"BAGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4IwDDO75VTblN7bkwbv95Vt1gqnwmsb+i7TKelZK3ojVsH4tgX55PCDrPcvud8wg3QLBQrFXjwkOrusiQPrtpwZEJpg=="
)
}
func testCompressedKeysUsingAPI() throws {
let x963Positive = Data(base64Encoded: "A+QHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L")!
let key = try P256.KeyAgreement.PublicKey(compressedRepresentation: x963Positive)
XCTAssertEqual(
key.compressedRepresentation,
x963Positive
)
let x963Negative = Data(base64Encoded: "AuQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L")!
let negativeKey = try P256.KeyAgreement.PublicKey(compressedRepresentation: x963Negative)
XCTAssertEqual(
negativeKey.compressedRepresentation,
x963Negative
)
let p384Positive = Data(base64Encoded: "AyEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNpw==")!
let p384Key = try P384.KeyAgreement.PublicKey(compressedRepresentation: p384Positive)
XCTAssertEqual(
p384Key.compressedRepresentation,
p384Positive
)
let p384Negative = Data(base64Encoded: "AiEfGE5ySReJyfSruLRdsjvCB5RNWGLk8JYrzIrans3MprXf5Q4nh69bQ2rI4+DNpw==")!
let p384NegativeKey = try P384.KeyAgreement.PublicKey(compressedRepresentation: p384Negative)
XCTAssertEqual(
p384NegativeKey.compressedRepresentation,
p384Negative
)
let p521Positive = Data(base64Encoded: "AwGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4Iw==")!
let p521Key = try P521.KeyAgreement.PublicKey(compressedRepresentation: p521Positive)
XCTAssertEqual(
p521Key.compressedRepresentation,
p521Positive
)
let p521Negative = Data(base64Encoded: "AgGUsatNKbCi6jeO1oFHpvhxesJnRxeZ45/sqCvaEZgwnpyj+/SsXjgBViEjvlJUdqentCaUFCwjuYZJM9HpdVq4Iw==")!
let p521NegativeKey = try P521.KeyAgreement.PublicKey(compressedRepresentation: p521Negative)
XCTAssertEqual(
p521NegativeKey.compressedRepresentation,
p521Negative
)
// Check that the uncompressed key gets rejected
let uncompressedX963 = Data(base64Encoded: "BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7LE6xvfFkB4Y3VXoOpB/Kp6ngpf3Lce9hDMl7fqaDUfYE=")!
XCTAssertThrowsError(try P256.KeyAgreement.PublicKey(compressedRepresentation: uncompressedX963))
}
func testUncompressedKeys() throws {
let uncompressedX963 = Data(base64Encoded: "BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7LE6xvfFkB4Y3VXoOpB/Kp6ngpf3Lce9hDMl7fqaDUfYE=")!
let key = try P256.KeyAgreement.PublicKey(x963Representation: uncompressedX963)
XCTAssertEqual(
key.x963Representation.base64EncodedString(),
"BOQHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7LE6xvfFkB4Y3VXoOpB/Kp6ngpf3Lce9hDMl7fqaDUfYE="
)
let compressedX963Positive = Data(base64Encoded: "A+QHCXtGd5WWSQgp37FBPXMy+nnSwFK79QQD0ZeNMv7L")!
XCTAssertThrowsError(try P256.KeyAgreement.PublicKey(x963Representation: compressedX963Positive))
}
func testWycheproof() throws {
try orFail {
try wycheproofTest(
bundleType: self,
jsonName: "x25519_test",
testFunction: { (group: ECDHTestGroup) in
try orFail { try testGroup(group: group) }
})
}
}
func testGroup(group: ECDHTestGroup) throws {
for testVector in group.tests {
let publicKey = try orFail { try Curve25519.KeyAgreement.PublicKey(rawRepresentation: Array(hexString: testVector.publicKey)) }
let privateKey = try orFail { try Curve25519.KeyAgreement.PrivateKey(rawRepresentation: Array(hexString: testVector.privateKey)) }
do {
let expectedSharedSecret = try Array(hexString: testVector.shared)
let testSharedSecret = try Array(privateKey.sharedSecretFromKeyAgreement(with: publicKey).ss)
XCTAssertEqual(testSharedSecret, expectedSharedSecret)
XCTAssert(testVector.result == "valid" || testVector.result == "acceptable")
} catch {
if testVector.flags.contains("LowOrderPublic") {
XCTAssertEqual(testVector.result, "acceptable")
return
}
XCTAssertEqual(testVector.result, "invalid")
}
}
}
}
#endif // CRYPTO_IN_SWIFTPM
|
