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ASN1Tests.swift
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ASN1Tests.swift
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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 (os(macOS) || os(iOS) || os(watchOS) || os(tvOS)) && CRYPTO_IN_SWIFTPM && !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
// Skip tests that require @testable imports of CryptoKit.
#else
#if (os(macOS) || os(iOS) || os(watchOS) || os(tvOS)) && !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
@testable import CryptoKit
#else
@testable import Crypto
#endif
class ASN1Tests: XCTestCase {
func testSimpleASN1P256SPKI() throws {
// Given a static SPKI structure, verifies the parse.
let encodedSPKI = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE2adMrdG7aUfZH57aeKFFM01dPnkxC18ScRb4Z6poMBgJtYlVtd9ly63URv57ZW0Ncs1LiZB7WATb3svu+1c7HQ=="
let decodedSPKI = Array(Data(base64Encoded: encodedSPKI)!)
let result = try orFail { try ASN1.parse(decodedSPKI) }
let spki = try orFail { try ASN1.SubjectPublicKeyInfo(asn1Encoded: result) }
XCTAssertEqual(spki.algorithmIdentifier, .ecdsaP256)
XCTAssertNoThrow(try P256.Signing.PublicKey(x963Representation: spki.key))
XCTAssertNoThrow(try P256.KeyAgreement.PublicKey(x963Representation: spki.key))
// For SPKI we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(spki))
XCTAssertEqual(serializer.serializedBytes, decodedSPKI)
}
func testSimpleASN1P384SPKI() throws {
let encodedSPKI = "MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEcBr0TNmgagf1ysckEA/3XLGx2amgzeHjDBZREqhCIVBrLhIiIR4zrJ8dqad/Y+zI2Hu8TIUbrzS/diFpFoE0YYKBTfYMCAUtaWuMb1oaBdFzWsLfYSSzF+ON1yeJCtro"
let decodedSPKI = Array(Data(base64Encoded: encodedSPKI)!)
let result = try orFail { try ASN1.parse(decodedSPKI) }
let spki = try orFail { try ASN1.SubjectPublicKeyInfo(asn1Encoded: result) }
XCTAssertEqual(spki.algorithmIdentifier, .ecdsaP384)
XCTAssertNoThrow(try P384.Signing.PublicKey(x963Representation: spki.key))
XCTAssertNoThrow(try P384.KeyAgreement.PublicKey(x963Representation: spki.key))
// For SPKI we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(spki))
XCTAssertEqual(serializer.serializedBytes, decodedSPKI)
}
func testSimpleASN1P521SPKI() throws {
let encodedSPKI = "MIGbMBAGByqGSM49AgEGBSuBBAAjA4GGAAQBTxMJZTRr9NcKmD7iTeX7ofcgz77JPTIDXOHFfS1tZHd9P0uAeK/ARwwDdsQpIKCvmtaO4O52oHqmczdrRwGtrHIBUTqaOw2Fqdiqt0fRQju9wH1Xi4h8u0h80MymUM0sbAQ70jHCeV0S0mGcJS8t3nfP+qLes30h297dPfV3SLsLg8M="
let decodedSPKI = Array(Data(base64Encoded: encodedSPKI)!)
let result = try orFail { try ASN1.parse(decodedSPKI) }
let spki = try orFail { try ASN1.SubjectPublicKeyInfo(asn1Encoded: result) }
XCTAssertEqual(spki.algorithmIdentifier, .ecdsaP521)
XCTAssertNoThrow(try P521.Signing.PublicKey(x963Representation: spki.key))
XCTAssertNoThrow(try P521.KeyAgreement.PublicKey(x963Representation: spki.key))
// For SPKI we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(spki))
XCTAssertEqual(serializer.serializedBytes, decodedSPKI)
}
func testASN1SEC1PrivateKeyP256() throws {
let encodedPrivateKey = "MHcCAQEEIFAV2+taX2/ht9HEcLQPtfyuRktTkn4S3RaCQwDmDnrloAoGCCqGSM49AwEHoUQDQgAE3Oed98X0hHmzHmmmgtf5rAVEv0jIeH61K61P5UyiCozn+fz+mlmBywvluiVvERiT9WZCd3tkPPWwbIr+a0dnwA=="
let decodedPrivateKey = Array(Data(base64Encoded: encodedPrivateKey)!)
let result = try orFail { try ASN1.parse(decodedPrivateKey) }
let pkey = try orFail { try ASN1.SEC1PrivateKey(asn1Encoded: result) }
XCTAssertEqual(pkey.algorithm, .ecdsaP256)
let privateKey = try orFail { try P256.Signing.PrivateKey(rawRepresentation: pkey.privateKey) }
let publicKey = try orFail { try P256.Signing.PublicKey(x963Representation: pkey.publicKey!) }
XCTAssertEqual(privateKey.publicKey.rawRepresentation, publicKey.rawRepresentation)
let kexPrivateKey = try orFail { try P256.KeyAgreement.PrivateKey(rawRepresentation: pkey.privateKey) }
let kexPublicKey = try orFail { try P256.KeyAgreement.PublicKey(x963Representation: pkey.publicKey!) }
XCTAssertEqual(kexPrivateKey.publicKey.rawRepresentation, kexPublicKey.rawRepresentation)
// For SEC1 we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(pkey))
XCTAssertEqual(serializer.serializedBytes, decodedPrivateKey)
}
func testASN1SEC1PrivateKeyP384() throws {
let encodedPrivateKey = "MIGkAgEBBDAWv9iH6ZivZKtk5ihjvjlZCYc9JHyykqvmJ7JVQ50ZZWTkCPtIe7RSKzm+l7NJltqgBwYFK4EEACKhZANiAAQz0BBmMxeOj5XwTL1G4fqTYO2UAiYrUMixiRFlFKVY5I6jAgiEWdNbmte8o6dByo0No5YoyDHdG637xvuzGaWd+IT5LoBAVVv3AgL3ao3dA4aVhm6Yz6G6/2o3X7AH99c="
let decodedPrivateKey = Array(Data(base64Encoded: encodedPrivateKey)!)
let result = try orFail { try ASN1.parse(decodedPrivateKey) }
let pkey = try orFail { try ASN1.SEC1PrivateKey(asn1Encoded: result) }
XCTAssertEqual(pkey.algorithm, .ecdsaP384)
let privateKey = try orFail { try P384.Signing.PrivateKey(rawRepresentation: pkey.privateKey) }
let publicKey = try orFail { try P384.Signing.PublicKey(x963Representation: pkey.publicKey!) }
XCTAssertEqual(privateKey.publicKey.rawRepresentation, publicKey.rawRepresentation)
let kexPrivateKey = try orFail { try P384.KeyAgreement.PrivateKey(rawRepresentation: pkey.privateKey) }
let kexPublicKey = try orFail { try P384.KeyAgreement.PublicKey(x963Representation: pkey.publicKey!) }
XCTAssertEqual(kexPrivateKey.publicKey.rawRepresentation, kexPublicKey.rawRepresentation)
// For SEC1 we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(pkey))
XCTAssertEqual(serializer.serializedBytes, decodedPrivateKey)
}
func testASN1SEC1PrivateKeyP521() throws {
let encodedPrivateKey = "MIHcAgEBBEIBONszidL11f7D8LEbVGKG4A7768X16w35/m6OSPO7MGQcYhWHpgSV4NZ6AFKcksavZSCa59lYdAN+MA3sUjO7R/mgBwYFK4EEACOhgYkDgYYABAAzsbWlHXjMkaSQTBnBKcyPDy/x0nk+VlkYQJXkh+lPJSVEYLbrUZ1LdbfM9mGE7HpgyyELNRHy/BD1JdNnAVPemAC5VQjeGKbezrxz7D5iZNiZiQFVYtMBU3XSsuJrPWVSjBF7xIkOr06k2xg1qlOoXQ66EPHQlwEYJ3xATNKk8K2jlQ=="
let decodedPrivateKey = Array(Data(base64Encoded: encodedPrivateKey)!)
let result = try orFail { try ASN1.parse(decodedPrivateKey) }
let pkey = try orFail { try ASN1.SEC1PrivateKey(asn1Encoded: result) }
XCTAssertEqual(pkey.algorithm, .ecdsaP521)
let privateKey = try orFail { try P521.Signing.PrivateKey(rawRepresentation: pkey.privateKey) }
let publicKey = try orFail { try P521.Signing.PublicKey(x963Representation: pkey.publicKey!) }
XCTAssertEqual(privateKey.publicKey.rawRepresentation, publicKey.rawRepresentation)
let kexPrivateKey = try orFail { try P521.KeyAgreement.PrivateKey(rawRepresentation: pkey.privateKey) }
let kexPublicKey = try orFail { try P521.KeyAgreement.PublicKey(x963Representation: pkey.publicKey!) }
XCTAssertEqual(kexPrivateKey.publicKey.rawRepresentation, kexPublicKey.rawRepresentation)
// For SEC1 we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(pkey))
XCTAssertEqual(serializer.serializedBytes, decodedPrivateKey)
}
func testASN1PKCS8PrivateKeyP256() throws {
let encodedPrivateKey = "MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgCRQo0CoBKfTOhdgQHcQIVv21vIUsxmE3t9L1LqV00bahRANCAATDXEj3jviAtzgx4bnMa/081v+FXbp7O5D1KtKVdje+ckejGVLYuYKE4Lpf5jonefi6wtoCc/sWHlbLiNV5PEB9"
let decodedPrivateKey = Array(Data(base64Encoded: encodedPrivateKey)!)
let result = try orFail { try ASN1.parse(decodedPrivateKey) }
let pkey = try orFail { try ASN1.PKCS8PrivateKey(asn1Encoded: result) }
XCTAssertEqual(pkey.algorithm, .ecdsaP256)
XCTAssertNil(pkey.privateKey.algorithm) // OpenSSL nils this out for some reason
let privateKey = try orFail { try P256.Signing.PrivateKey(rawRepresentation: pkey.privateKey.privateKey) }
let publicKey = try orFail { try P256.Signing.PublicKey(x963Representation: pkey.privateKey.publicKey!) }
XCTAssertEqual(privateKey.publicKey.rawRepresentation, publicKey.rawRepresentation)
let kexPrivateKey = try orFail { try P256.KeyAgreement.PrivateKey(rawRepresentation: pkey.privateKey.privateKey) }
let kexPublicKey = try orFail { try P256.KeyAgreement.PublicKey(x963Representation: pkey.privateKey.publicKey!) }
XCTAssertEqual(kexPrivateKey.publicKey.rawRepresentation, kexPublicKey.rawRepresentation)
// For PKCS8 we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(pkey))
XCTAssertEqual(serializer.serializedBytes, decodedPrivateKey)
}
func testASN1PKCS8PrivateKeyP384() throws {
let encodedPrivateKey = "MIG2AgEAMBAGByqGSM49AgEGBSuBBAAiBIGeMIGbAgEBBDCKfeRAkTtGQG7bGao6Ca5MDDcmxttyr6HNmNoaSkmuYvBtLGLLBWm1+VHT602xOIihZANiAAS56RzXiLO5YvFI0qh/+T9DhOXfkm3K/jJSUAqV/hP0FUlIUR824cFVdMMQA1S100mETsxdT0QDqUGAinMTUBSyk9y+jR33Fw/A068ZQRlqTCa0ThS0vwxKhM/M4vhYeDE="
let decodedPrivateKey = Array(Data(base64Encoded: encodedPrivateKey)!)
let result = try orFail { try ASN1.parse(decodedPrivateKey) }
let pkey = try orFail { try ASN1.PKCS8PrivateKey(asn1Encoded: result) }
XCTAssertEqual(pkey.algorithm, .ecdsaP384)
XCTAssertNil(pkey.privateKey.algorithm) // OpenSSL nils this out for some reason
let privateKey = try orFail { try P384.Signing.PrivateKey(rawRepresentation: pkey.privateKey.privateKey) }
let publicKey = try orFail { try P384.Signing.PublicKey(x963Representation: pkey.privateKey.publicKey!) }
XCTAssertEqual(privateKey.publicKey.rawRepresentation, publicKey.rawRepresentation)
let kexPrivateKey = try orFail { try P384.KeyAgreement.PrivateKey(rawRepresentation: pkey.privateKey.privateKey) }
let kexPublicKey = try orFail { try P384.KeyAgreement.PublicKey(x963Representation: pkey.privateKey.publicKey!) }
XCTAssertEqual(kexPrivateKey.publicKey.rawRepresentation, kexPublicKey.rawRepresentation)
// For PKCS8 we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(pkey))
XCTAssertEqual(serializer.serializedBytes, decodedPrivateKey)
}
func testASN1PKCS8PrivateKeyP521() throws {
let encodedPrivateKey = "MIHuAgEAMBAGByqGSM49AgEGBSuBBAAjBIHWMIHTAgEBBEIB/rwbfr3a+rdHQvKToS6Fw1WxsVFy3Wq2ylWC+EyQv//nGiT5TQYIAV2WDmmud3WnczITapXAAe6eS66jHa+OxyGhgYkDgYYABADrY6IBU4t8BjSIvDWA4VrLILdUOFemM2G8phpJWlGpEO8Qmk28w5pdLD2j3chBvg0xBBi2k9Ked9L43R4E3+gPCAA3CY8v01xlA6npJvdAK0/Md4mY+p65Ehua95jXnSwrpF66+Q/se2ODvZPhXGKBvttxrKyBr9htmkAUv9Sdah+dWQ=="
let decodedPrivateKey = Array(Data(base64Encoded: encodedPrivateKey)!)
let result = try orFail { try ASN1.parse(decodedPrivateKey) }
let pkey = try orFail { try ASN1.PKCS8PrivateKey(asn1Encoded: result) }
XCTAssertEqual(pkey.algorithm, .ecdsaP521)
XCTAssertNil(pkey.privateKey.algorithm) // OpenSSL nils this out for some reason
let privateKey = try orFail { try P521.Signing.PrivateKey(rawRepresentation: pkey.privateKey.privateKey) }
let publicKey = try orFail { try P521.Signing.PublicKey(x963Representation: pkey.privateKey.publicKey!) }
XCTAssertEqual(privateKey.publicKey.rawRepresentation, publicKey.rawRepresentation)
let kexPrivateKey = try orFail { try P521.KeyAgreement.PrivateKey(rawRepresentation: pkey.privateKey.privateKey) }
let kexPublicKey = try orFail { try P521.KeyAgreement.PublicKey(x963Representation: pkey.privateKey.publicKey!) }
XCTAssertEqual(kexPrivateKey.publicKey.rawRepresentation, kexPublicKey.rawRepresentation)
// For PKCS8 we should be able to round-trip the serialization.
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(pkey))
XCTAssertEqual(serializer.serializedBytes, decodedPrivateKey)
}
func testRejectDripFedASN1SPKIP256() throws {
// This test drip-feeds an ASN.1 P256 SPKI block. It should never parse correctly until we feed the entire block.
let encodedSPKI = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE2adMrdG7aUfZH57aeKFFM01dPnkxC18ScRb4Z6poMBgJtYlVtd9ly63URv57ZW0Ncs1LiZB7WATb3svu+1c7HQ=="
let decodedSPKI = Array(Data(base64Encoded: encodedSPKI)!)
for index in decodedSPKI.indices {
let expectSuccessfulParse = index == decodedSPKI.endIndex
do {
_ = try ASN1.parse(decodedSPKI[..<index])
if !expectSuccessfulParse {
XCTFail("Unexpected successful parse with: \(decodedSPKI[...])")
}
} catch let error as CryptoKitASN1Error {
if expectSuccessfulParse {
XCTFail("Unexpected failure (error: \(error)) with \(decodedSPKI[...])")
}
}
}
}
func testASN1TypesRequireAppropriateTypeIdentifierToDecode() throws {
// This is an ASN.1 REAL, a type we don't support
let base64Node = "CQUDMUUtMQ=="
let decodedReal = Array(Data(base64Encoded: base64Node)!)
let parsed = try orFail { try ASN1.parse(decodedReal) }
XCTAssertThrowsError(try ASN1.ASN1ObjectIdentifier(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .unexpectedFieldType)
}
XCTAssertThrowsError(try ASN1.sequence(parsed, { _ in })) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .unexpectedFieldType)
}
XCTAssertThrowsError(try ASN1.ASN1OctetString(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .unexpectedFieldType)
}
XCTAssertThrowsError(try ASN1.ASN1BitString(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .unexpectedFieldType)
}
XCTAssertThrowsError(try Int(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .unexpectedFieldType)
}
}
func testMultipleRootNodesAreForbidden() throws {
// This is an ASN.1 REAL, a type we don't support, repeated
let base64Node = "CQUDMUUtMQkFAzFFLTE="
let decodedReal = Array(Data(base64Encoded: base64Node)!)
XCTAssertThrowsError(try ASN1.parse(decodedReal)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testTrailingBytesAreForbidden() throws {
// This is an ASN.1 INTEGER with trailing junk bytes
let base64Node = "AgEBAA=="
let decodedInteger = Array(Data(base64Encoded: base64Node)!)
XCTAssertThrowsError(try ASN1.parse(decodedInteger)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testEmptyStringsDontDecode() throws {
XCTAssertThrowsError(try ASN1.parse([])) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .truncatedASN1Field)
}
}
func testRejectMultibyteTag() throws {
// This is an ASN.1 INTEGER with a multibyte explicit tag, with the raw numerical value being 55.
let base64Node = "vzcDAgEB"
let decodedInteger = Array(Data(base64Encoded: base64Node)!)
XCTAssertThrowsError(try ASN1.parse(decodedInteger)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidFieldIdentifier)
}
}
func testSequenceMustConsumeAllNodes() throws {
// This is an ASN.1 SEQUENCE with two child nodes, both octet strings. We're going to consume only one.
let base64Sequence = "MAwEBEFCQ0QEBEVGR0g="
let decodedSequence = Array(Data(base64Encoded: base64Sequence)!)
let parsed = try orFail { try ASN1.parse(decodedSequence) }
do {
try ASN1.sequence(parsed) { nodes in
// This is fine.
XCTAssertNoThrow(try ASN1.ASN1OctetString(asn1Encoded: &nodes))
}
} catch let error as CryptoKitASN1Error {
XCTAssertEqual(error, .invalidASN1Object)
}
}
func testNodesErrorIfThereIsInsufficientData() throws {
struct Stub: ASN1Parseable {
init(asn1Encoded node: ASN1.ASN1Node) throws {
XCTFail("Must not be called")
}
}
// This is an ASN.1 SEQUENCE with two child nodes, both octet strings. We're going to consume both and then try
// to eat the (nonexistent) next node.
let base64Sequence = "MAwEBEFCQ0QEBEVGR0g="
let decodedSequence = Array(Data(base64Encoded: base64Sequence)!)
let parsed = try orFail { try ASN1.parse(decodedSequence) }
do {
try ASN1.sequence(parsed) { nodes in
XCTAssertNoThrow(try ASN1.ASN1OctetString(asn1Encoded: &nodes))
XCTAssertNoThrow(try ASN1.ASN1OctetString(asn1Encoded: &nodes))
_ = try Stub(asn1Encoded: &nodes)
}
} catch let error as CryptoKitASN1Error {
XCTAssertEqual(error, .invalidASN1Object)
}
}
func testRejectsIndefiniteLengthForm() throws {
// This the first octets of a constructed object of unknown tag type (private, number 7) whose length
// is indefinite. We reject this immediately, not even noticing that the rest of the data isn't here.
XCTAssertThrowsError(try ASN1.parse([0xe7, 0x80])) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .unsupportedFieldLength)
}
}
func testRejectsUnterminatedASN1OIDSubidentifiers() throws {
// This data contains the ASN.1 OID 2.6.7, with the last subidentifier having been mangled to set the top bit.
// This makes it look like we're expecting more data in the OID, and we should flag it as truncated.
let badBase64 = "BgJWhw=="
let badNode = Array(Data(base64Encoded: badBase64)!)
let parsed = try orFail { try ASN1.parse(badNode) }
XCTAssertThrowsError(try ASN1.ASN1ObjectIdentifier(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testRejectsMassiveIntegers() throws {
// This is an ASN.1 integer containing UInt64.max * 2. This is too big for us to store, and we reject it.
// This test may need to be rewritten if we either support arbitrary integers or move to platforms where
// UInt is larger than 64 bits (seems unlikely).
let badBase64 = "AgkB//////////4="
let badNode = Array(Data(base64Encoded: badBase64)!)
let parsed = try orFail { try ASN1.parse(badNode) }
XCTAssertThrowsError(try Int(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testStraightforwardPEMParsing() throws {
let simplePEM = """
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIBHli4jaj+JwWQlU0yhZUu+TdMPVhZ3wR2PS416Sz/K/oAoGCCqGSM49
AwEHoUQDQgAEOhvJhbc3zM4SJooCaWdyheY2E6wWkISg7TtxJYgb/S0Zz7WruJzG
O9zxi7HTvuXyQr7QKSBtdCGmHym+WoPsbA==
-----END EC PRIVATE KEY-----
"""
let document = try orFail { try ASN1.PEMDocument(pemString: simplePEM) }
XCTAssertEqual(document.type, "EC PRIVATE KEY")
XCTAssertEqual(document.derBytes.count, 121)
let parsed = try orFail { try ASN1.parse(Array(document.derBytes)) }
let pkey = try orFail { try ASN1.SEC1PrivateKey(asn1Encoded: parsed) }
let reserialized = document.pemString
XCTAssertEqual(reserialized, simplePEM)
var serializer = ASN1.Serializer()
XCTAssertNoThrow(try serializer.serialize(pkey))
let reserialized2 = ASN1.PEMDocument(type: "EC PRIVATE KEY", derBytes: Data(serializer.serializedBytes))
XCTAssertEqual(reserialized2.pemString, simplePEM)
}
func testTruncatedPEMDocumentsAreRejected() throws {
// We drip feed the PEM one extra character at a time. It never parses successfully.
let simplePEM = """
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIBHli4jaj+JwWQlU0yhZUu+TdMPVhZ3wR2PS416Sz/K/oAoGCCqGSM49
AwEHoUQDQgAEOhvJhbc3zM4SJooCaWdyheY2E6wWkISg7TtxJYgb/S0Zz7WruJzG
O9zxi7HTvuXyQr7QKSBtdCGmHym+WoPsbA==
-----END EC PRIVATE KEY-----
"""
for index in simplePEM.indices.dropLast() {
XCTAssertThrowsError(try ASN1.PEMDocument(pemString: String(simplePEM[..<index]))) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
}
XCTAssertNoThrow(try ASN1.PEMDocument(pemString: simplePEM))
}
func testMismatchedDiscriminatorsAreRejected() throws {
// Different discriminators is not allowed.
let simplePEM = """
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIBHli4jaj+JwWQlU0yhZUu+TdMPVhZ3wR2PS416Sz/K/oAoGCCqGSM49
AwEHoUQDQgAEOhvJhbc3zM4SJooCaWdyheY2E6wWkISg7TtxJYgb/S0Zz7WruJzG
O9zxi7HTvuXyQr7QKSBtdCGmHym+WoPsbA==
-----END EC PUBLIC KEY-----
"""
XCTAssertThrowsError(try ASN1.PEMDocument(pemString: simplePEM)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
}
func testOverlongLinesAreForbidden() throws {
// This is arguably an excessive restriction, but we should try to be fairly strict here.
let simplePEM = """
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIBHli4jaj+JwWQlU0yhZUu+TdMPVhZ3wR2PS416Sz/K/oAoGCCqGSM49
AwEHoUQDQgAEOhvJhbc3zM4SJooCaWdyheY2E6wWkISg7TtxJYgb/S0Zz7WruJzGO
9zxi7HTvuXyQr7QKSBtdCGmHym+WoPsbA==
-----END EC PRIVATE KEY-----
"""
XCTAssertThrowsError(try ASN1.PEMDocument(pemString: simplePEM)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
}
func testEarlyShortLinesAreForbidden() throws {
// This is arguably an excessive restriction, but we should try to be fairly strict here.
let simplePEM = """
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIBHli4jaj+JwWQlU0yhZUu+TdMPVhZ3wR2PS416Sz/K/oAoGCCqGSM49
AwEHoUQDQgAEOhvJhbc3zM4SJooCaWdyheY2E6wWkISg7TtxJYgb/S0Zz7WruJz
GO9zxi7HTvuXyQr7QKSBtdCGmHym+WoPsbA==
-----END EC PRIVATE KEY-----
"""
XCTAssertThrowsError(try ASN1.PEMDocument(pemString: simplePEM)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
}
func testEmptyPEMDocument() throws {
let simplePEM = """
-----BEGIN EC PRIVATE KEY-----
-----END EC PRIVATE KEY-----
"""
XCTAssertThrowsError(try ASN1.PEMDocument(pemString: simplePEM)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
}
func testInvalidBase64IsForbidden() throws {
let simplePEM = """
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIBHli4jaj+JwWQlU0yhZUu+TdMPVhZ3wR2PS416Sz/K/oAoGCCqGSM49
AwEHoUQDQgAEOhvJhbc3zM4SJooCaWdyheY2E6wWkISg7TtxJYgb/S0Zz7WruJzG
O9zxi7HTvuXyQr7QKSBtdC%mHym+WoPsbA==
-----END EC PRIVATE KEY-----
"""
XCTAssertThrowsError(try ASN1.PEMDocument(pemString: simplePEM)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
}
func testRejectSingleComponentOIDs() throws {
// This is an encoded OID that has only one subcomponent, 0.
let singleComponentOID: [UInt8] = [0x06, 0x01, 0x00]
let parsed = try orFail { try ASN1.parse(singleComponentOID) }
XCTAssertThrowsError(try ASN1.ASN1ObjectIdentifier(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidObjectIdentifier)
}
}
func testRejectZeroComponentOIDs() throws {
// This is an encoded OID that has no subcomponents..
let zeroComponentOID: [UInt8] = [0x06, 0x00]
let parsed = try orFail { try ASN1.parse(zeroComponentOID) }
XCTAssertThrowsError(try ASN1.ASN1ObjectIdentifier(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidObjectIdentifier)
}
}
func testRejectNonOctetNumberOfBitsInBitstring() throws {
// We don't allow bitstrings that have any number of bits in the bitstring that isn't a multiple of 8.
for i in 1..<8 {
let weirdBitString = [0x03, 0x02, UInt8(i), 0xFF]
let parsed = try orFail { try ASN1.parse(weirdBitString) }
XCTAssertThrowsError(try ASN1.ASN1BitString(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
}
func testBitstringWithNoContent() throws {
// We don't allow bitstrings with no content.
let weirdBitString: [UInt8] = [0x03, 0x00]
let parsed = try orFail { try ASN1.parse(weirdBitString) }
XCTAssertThrowsError(try ASN1.ASN1BitString(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testEmptyBitstring() throws {
// Empty bitstrings must have their leading byte set to 0.
var bitString: [UInt8] = [0x03, 0x01, 0x00]
let parsed = try orFail { try ASN1.parse(bitString) }
let bs = try orFail { try ASN1.ASN1BitString(asn1Encoded: parsed) }
XCTAssertEqual(bs.bytes, [])
for i in 1..<8 {
bitString[2] = UInt8(i)
let parsed = try orFail { try ASN1.parse(bitString) }
XCTAssertThrowsError(try ASN1.ASN1BitString(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
}
func testIntegerZeroRequiresAZeroByte() throws {
// Integer zero requires a leading zero byte.
let weirdZero: [UInt8] = [0x02, 0x00]
let parsed = try orFail { try ASN1.parse(weirdZero) }
XCTAssertThrowsError(try Int(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1IntegerEncoding)
}
}
func testLeadingZero() throws {
// We should reject integers that have unnecessary leading zero bytes.
let overlongOne: [UInt8] = [0x02, 0x02, 0x00, 0x01]
let parsed = try orFail { try ASN1.parse(overlongOne) }
XCTAssertThrowsError(try Int(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1IntegerEncoding)
}
}
func testLeadingOnes() throws {
// We should reject integers that have unnecessary leading one bytes. This is supposed to be a -127, but we encode it as though it
// were an Int16.
let overlongOneTwoSeven: [UInt8] = [0x02, 0x02, 0xFF, 0x81]
let parsed = try orFail { try ASN1.parse(overlongOneTwoSeven) }
XCTAssertThrowsError(try Int(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1IntegerEncoding)
}
}
func testNotConsumingTaggedObject() throws {
// We should error if there are two nodes inside an explicitly tagged object.
let weirdASN1: [UInt8] = [
0x30, 0x08, // Sequence, containing...
0xA2, 0x06, // Context specific tag 2, 3 byte body, containing...
0x02, 0x01, 0x00, // Integer 0 and
0x02, 0x01, 0x01 // Integer 1
]
let parsed = try orFail { try ASN1.parse(weirdASN1) }
try ASN1.sequence(parsed) { nodes in
XCTAssertThrowsError(try ASN1.optionalExplicitlyTagged(&nodes, tagNumber: 2, tagClass: .contextSpecific, { _ in })) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
}
func testSPKIWithUnexpectedKeyTypeOID() throws {
// This is an SPKI object for RSA instead of EC. This is a 1024-bit RSA key, so hopefully no-one will think to use it.
let rsaSPKI = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDQEcP8qgwq5JhGgl1mKMeOWbb0WFKkJKj4Tvm4RFWGKDYg/p+Fm8vHwPSICqU9HJ+dHF2Ty0M6WVwVlf6RJdJGsrp1s9cbxfc/74PdQUssIhUjhlBO2RFlQECbgNpw5UleRB9FLnEDp33qMgdr7nwXiYCTjd04QSkdU3mXJYrFfwIDAQAB"
let decodedSPKI = Array(Data(base64Encoded: rsaSPKI)!)
let parsed = try orFail { try ASN1.parse(decodedSPKI) }
XCTAssertThrowsError(try ASN1.SubjectPublicKeyInfo(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testSPKIWithUnsupportedCurve() throws {
// This is an EC SPKI object with an unsupported named curve.
let b64SPKI = "MFYwEAYHKoZIzj0CAQYFK4EEAAoDQgAEzN09Sbb+mhMIlUbOdoIoND8lNcoQPd/yZDjQi1IDyDQEvVvz1yhi5J0FPLAlM3hE2o/a+rASUz2UP4fX5Cpnxw=="
let decodedSPKI = Array(Data(base64Encoded: b64SPKI)!)
let parsed = try orFail { try ASN1.parse(decodedSPKI) }
XCTAssertThrowsError(try ASN1.SubjectPublicKeyInfo(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testSEC1PrivateKeyWithUnknownVersion() throws {
// This is the beginning of a SEC1 private key with hypothetical version number 5. We should reject it
let weirdSEC1: [UInt8] = [0x30, 0x03, 0x02, 0x01, 0x05]
let parsed = try orFail { try ASN1.parse(weirdSEC1) }
XCTAssertThrowsError(try ASN1.SEC1PrivateKey(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testSEC1PrivateKeyUnsupportedKeyType() throws {
// This is an EC SPKI object with an unsupported named curve.
let b64SEC1 = "MHQCAQEEINIuVmNF7g1wNCJWXDpgL+09jATtaS1n0SxqqQneHi+woAcGBSuBBAAKoUQDQgAEB7v/p7gvuV0aDx02EF6a+pr563p+FzRJXI+COWHdr+XRcjg6vEi4n3Jj7ksmEg4t1x6E1xFyTvF3eV/B/XVXbw=="
let decodedSEC1 = Array(Data(base64Encoded: b64SEC1)!)
let parsed = try orFail { try ASN1.parse(decodedSEC1) }
XCTAssertThrowsError(try ASN1.SEC1PrivateKey(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testPKCS8KeyWithNonMatchingKeyOIDS() throws {
// This is a stubbed PKCS8 key with mismatched OIDs in the inner and outer payload. We have to serialize it out, sadly.
var serializer = ASN1.Serializer()
try orFail {
try serializer.appendConstructedNode(identifier: .sequence) { coder in
try coder.serialize(0)
try coder.serialize(ASN1.RFC5480AlgorithmIdentifier.ecdsaP256)
var subCoder = ASN1.Serializer()
try subCoder.serialize(ASN1.SEC1PrivateKey(privateKey: [], algorithm: .ecdsaP384, publicKey: [])) // We won't notice these are empty either, but we will notice the algo mismatch.
let serializedKey = ASN1.ASN1OctetString(contentBytes: subCoder.serializedBytes[...])
try coder.serialize(serializedKey)
}
}
let parsed = try orFail { try ASN1.parse(serializer.serializedBytes) }
XCTAssertThrowsError(try ASN1.PKCS8PrivateKey(asn1Encoded: parsed)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidASN1Object)
}
}
func testSimplePEMP256SPKI() throws {
let pemPublicKey = """
-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEb4nB0k8CBVnKCHVHkxuXAkSlZuO5
Nsev1rzcRv5QHiJuWUKomFGadQlMSGwoDOHEDdW3ujcA6t0ADteHw6KrZg==
-----END PUBLIC KEY-----
"""
// Test the working public keys.
let signingKey = try orFail { try P256.Signing.PublicKey(pemRepresentation: pemPublicKey) }
let keyAgreementKey = try orFail { try P256.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey) }
XCTAssertEqual(signingKey.rawRepresentation, keyAgreementKey.rawRepresentation)
// Now the non-matching public keys.
XCTAssertThrowsError(try P384.Signing.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P384.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P521.Signing.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P521.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
// Now the private keys, which all fail.
XCTAssertThrowsError(try P256.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P256.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
// Validate we can reserialize.
let firstReserialization = signingKey.pemRepresentation
let secondReserialization = keyAgreementKey.pemRepresentation
XCTAssertEqual(firstReserialization, pemPublicKey)
XCTAssertEqual(secondReserialization, pemPublicKey)
}
func testSimplePEMP384SPKI() throws {
let pemPublicKey = """
-----BEGIN PUBLIC KEY-----
MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEBwY0l7mq7hSBEZRld5ISWfSoFsYN3wwM
hdD3cMU95DmYXzbqVHB4dCfsy7bexm4h9c0zs4CyTPzy3DV3vfmv1akQJIQv7l08
lx/YXNeGXTN4Gr9r4rwA5GvRl1p6plPL
-----END PUBLIC KEY-----
"""
// Test the working public keys.
let signingKey = try orFail { try P384.Signing.PublicKey(pemRepresentation: pemPublicKey) }
let keyAgreementKey = try orFail { try P384.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey) }
XCTAssertEqual(signingKey.rawRepresentation, keyAgreementKey.rawRepresentation)
// Now the non-matching public keys.
XCTAssertThrowsError(try P256.Signing.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P256.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P521.Signing.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P521.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
// Now the private keys, which all fail.
XCTAssertThrowsError(try P256.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P256.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
// Validate we can reserialize.
let firstReserialization = signingKey.pemRepresentation
let secondReserialization = keyAgreementKey.pemRepresentation
XCTAssertEqual(firstReserialization, pemPublicKey)
XCTAssertEqual(secondReserialization, pemPublicKey)
}
func testSimplePEMP521SPKI() throws {
let pemPublicKey = """
-----BEGIN PUBLIC KEY-----
MIGbMBAGByqGSM49AgEGBSuBBAAjA4GGAAQAp3v1UQWvSyQnkAUEBu+x/7ZrPtNJ
SCUk9kMvuZMyGP1idwvspALuJjzrSFFlXObjlOjxucSbWhTYF/o3nc0XzpAA3dxA
BYiMqH9vrVePoJMpv+DMdkUiUJ/WqHSOu9bJEi1h4fdqh5HHx4QZJY/iX/59VAi1
uSbAhALvbdGFbVpkcOs=
-----END PUBLIC KEY-----
"""
// Test the working public keys.
let signingKey = try orFail { try P521.Signing.PublicKey(pemRepresentation: pemPublicKey) }
let keyAgreementKey = try orFail { try P521.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey) }
XCTAssertEqual(signingKey.rawRepresentation, keyAgreementKey.rawRepresentation)
// Now the non-matching public keys.
XCTAssertThrowsError(try P256.Signing.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P256.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P384.Signing.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
XCTAssertThrowsError(try P384.KeyAgreement.PublicKey(pemRepresentation: pemPublicKey)) { error in
guard case .incorrectParameterSize = error as? CryptoKitError else {
XCTFail("Unexpected error: \(error)")
return
}
}
// Now the private keys, which all fail.
XCTAssertThrowsError(try P256.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P256.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.Signing.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.KeyAgreement.PrivateKey(pemRepresentation: pemPublicKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
// Validate we can reserialize.
let firstReserialization = signingKey.pemRepresentation
let secondReserialization = keyAgreementKey.pemRepresentation
XCTAssertEqual(firstReserialization, pemPublicKey)
XCTAssertEqual(secondReserialization, pemPublicKey)
}
func testSimplePEMP256PKCS8() throws {
let pemPrivateKey = """
-----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgZjQLlzempZx7YF1F
+MK1HWZTNgLcC1MAufb/2/YZYk6hRANCAAQwgn0PfkIHiZ/K+3zA//CoDqU2PqDc
aA3U5R68jmlZQITvMyBlMJl9Mjh0biIe88dAfRKeUm9FVMD2ErJ/006V
-----END PRIVATE KEY-----
"""
// Test the working private keys.
let signingKey = try orFail { try P256.Signing.PrivateKey(pemRepresentation: pemPrivateKey) }
let keyAgreementKey = try orFail { try P256.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey) }
XCTAssertEqual(signingKey.rawRepresentation, keyAgreementKey.rawRepresentation)
// Now the non-matching private keys.
XCTAssertThrowsError(try P384.Signing.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P384.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P521.Signing.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P521.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey))
// Now the public keys, which all fail.
XCTAssertThrowsError(try P256.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P256.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
// Validate we can reserialize.
let firstReserialization = signingKey.pemRepresentation
let secondReserialization = keyAgreementKey.pemRepresentation
XCTAssertEqual(firstReserialization, pemPrivateKey)
XCTAssertEqual(secondReserialization, pemPrivateKey)
}
func testSimplePEMP384PKCS8() throws {
let pemPrivateKey = """
-----BEGIN PRIVATE KEY-----
MIG2AgEAMBAGByqGSM49AgEGBSuBBAAiBIGeMIGbAgEBBDB7ERKhMR+mvz1NQ+oL
i6ZJMACOcwbUetWcNnB4Mnx3j4XuhpkkHEW8E1+rXyjZ3UmhZANiAASYH+emlyXM
kBSFJl0BiopDVuIIR47M4pLl00YNnuu/Rp5VHeVAHrP67i2Q92u5fk34eOSwQvkO
VvktWsgtzAomIam4SHqE9bhvrHy6kW6QzxlERHTL+YkXEX8c6t8VOxk=
-----END PRIVATE KEY-----
"""
// Test the working private keys.
let signingKey = try orFail { try P384.Signing.PrivateKey(pemRepresentation: pemPrivateKey) }
let keyAgreementKey = try orFail { try P384.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey) }
XCTAssertEqual(signingKey.rawRepresentation, keyAgreementKey.rawRepresentation)
// Now the non-matching private keys.
XCTAssertThrowsError(try P256.Signing.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P256.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P521.Signing.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P521.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey))
// Now the public keys, which all fail.
XCTAssertThrowsError(try P256.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P256.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
// Validate we can reserialize.
let firstReserialization = signingKey.pemRepresentation
let secondReserialization = keyAgreementKey.pemRepresentation
XCTAssertEqual(firstReserialization, pemPrivateKey)
XCTAssertEqual(secondReserialization, pemPrivateKey)
}
func testSimplePEMP521PKCS8() throws {
let pemPrivateKey = """
-----BEGIN PRIVATE KEY-----
MIHuAgEAMBAGByqGSM49AgEGBSuBBAAjBIHWMIHTAgEBBEIAmMp6YYRfT6uA+DFi
VB/V7FGAgjjuin1GcF8eujBZTcNB8jyzyXfG7Ak80jd3yhrHhAg7rOOZYV72Ekz5
o05NKM2hgYkDgYYABAEIOePr9DPc9lGHqSYrGHX0ICvZxy3DLTjPcl7jgAcUU9NT
1DBvJ7aAAmzTImz9mKOJk14f1fxc1BsWjsf1hU4QOwFu1l+dIDcNYFUxjzsGMc5e
LsSxRn35ts4qogmz3kmerOc0smI8NIFiK/EuinK5Bs8PfPMW3ZOCIpvXbqyksLk0
rg==
-----END PRIVATE KEY-----
"""
// Test the working private keys.
let signingKey = try orFail { try P521.Signing.PrivateKey(pemRepresentation: pemPrivateKey) }
let keyAgreementKey = try orFail { try P521.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey) }
XCTAssertEqual(signingKey.rawRepresentation, keyAgreementKey.rawRepresentation)
// Now the non-matching private keys.
XCTAssertThrowsError(try P256.Signing.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P256.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P384.Signing.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P384.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey))
// Now the public keys, which all fail.
XCTAssertThrowsError(try P256.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P256.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P384.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.Signing.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
XCTAssertThrowsError(try P521.KeyAgreement.PublicKey(pemRepresentation: pemPrivateKey)) { error in
XCTAssertEqual(error as? CryptoKitASN1Error, .invalidPEMDocument)
}
// Validate we can reserialize.
let firstReserialization = signingKey.pemRepresentation
let secondReserialization = keyAgreementKey.pemRepresentation
XCTAssertEqual(firstReserialization, pemPrivateKey)
XCTAssertEqual(secondReserialization, pemPrivateKey)
}
func testSimplePEMP256SEC1PrivateKey() throws {
let pemPrivateKey = """
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIHwS3r7tdBfDPSOaT/x6A2qvXFFXlGmnaYkxzrj1CQUHoAoGCCqGSM49
AwEHoUQDQgAE79HvsMQC9IyhZ7yCCYKmgz9zewM4KziWoVMXKN+7Cd5Ds+jK8V5q
hD6YVbbo/v1udmM5DfhHJiUW3Ww5++suRg==
-----END EC PRIVATE KEY-----
"""
// Test the working private keys.
let signingKey = try orFail { try P256.Signing.PrivateKey(pemRepresentation: pemPrivateKey) }
let keyAgreementKey = try orFail { try P256.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey) }
XCTAssertEqual(signingKey.rawRepresentation, keyAgreementKey.rawRepresentation)
// Now the non-matching private keys.
XCTAssertThrowsError(try P384.Signing.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P384.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P521.Signing.PrivateKey(pemRepresentation: pemPrivateKey))
XCTAssertThrowsError(try P521.KeyAgreement.PrivateKey(pemRepresentation: pemPrivateKey))
// Now the public keys, which all fail.