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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftCertificates open source project
//
// Copyright (c) 2023 Apple Inc. and the SwiftCertificates project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftCertificates project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import Foundation
import XCTest
import Crypto
import _CryptoExtras
import SwiftASN1
@testable import X509
final class CSRTests: XCTestCase {
func testSimpleRoundTrip() throws {
let key = P256.Signing.PrivateKey()
let name = try DistinguishedName {
CommonName("Hello")
}
let extensions = try Certificate.Extensions {
SubjectAlternativeNames([.dnsName("example.com")])
}
let extensionRequest = ExtensionRequest(extensions: extensions)
let attributes = try CertificateSigningRequest.Attributes(
[.init(extensionRequest)]
)
let csr = try CertificateSigningRequest(
version: .v1,
subject: name,
privateKey: .init(key),
attributes: attributes,
signatureAlgorithm: .ecdsaWithSHA256
)
let bytes = try DER.Serializer.serialized(element: csr)
let parsed = try CertificateSigningRequest(derEncoded: bytes)
XCTAssertEqual(parsed, csr)
}
func testRSASHA1CSR() throws {
let url = Bundle.module.url(
forResource: "rsa_sha1",
withExtension: "der",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try Data(contentsOf: url)
let csr = try CertificateSigningRequest(derEncoded: Array(bytes))
XCTAssertEqual(csr.signatureAlgorithm, .sha1WithRSAEncryption)
XCTAssertEqual(
csr.subject,
try! DistinguishedName([
.init(type: .NameAttributes.countryName, printableString: "US"),
.init(type: .NameAttributes.stateOrProvinceName, printableString: "Texas"),
.init(type: .NameAttributes.localityName, printableString: "Austin"),
.init(type: .NameAttributes.organizationName, printableString: "PyCA"),
.init(type: .NameAttributes.commonName, printableString: "cryptography.io"),
])
)
XCTAssertNotNil(_RSA.Signing.PublicKey(csr.publicKey))
XCTAssertNil(csr.attributes[oid: .CSRAttributes.extensionRequest])
XCTAssertTrue(csr.publicKey.isValidSignature(csr.signature, for: csr))
var serializer = DER.Serializer()
try serializer.serialize(csr)
XCTAssertEqual(Array(bytes), serializer.serializedBytes)
}
func testRSASHA1CSRPEM() throws {
let url = Bundle.module.url(
forResource: "rsa_sha1",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let pemDocument = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: pemDocument)
XCTAssertEqual(csr.signatureAlgorithm, .sha1WithRSAEncryption)
XCTAssertEqual(
csr.subject,
try! DistinguishedName([
.init(type: .NameAttributes.countryName, printableString: "US"),
.init(type: .NameAttributes.stateOrProvinceName, printableString: "Texas"),
.init(type: .NameAttributes.localityName, printableString: "Austin"),
.init(type: .NameAttributes.organizationName, printableString: "PyCA"),
.init(type: .NameAttributes.commonName, printableString: "cryptography.io"),
])
)
XCTAssertNotNil(_RSA.Signing.PublicKey(csr.publicKey))
XCTAssertNil(csr.attributes[oid: .CSRAttributes.extensionRequest])
XCTAssertTrue(csr.publicKey.isValidSignature(csr.signature, for: csr))
let reEncoded = try csr.serializeAsPEM()
XCTAssertEqual(
pemDocument.trimmingCharacters(in: .whitespacesAndNewlines),
reEncoded.pemString.trimmingCharacters(in: .whitespacesAndNewlines)
)
}
func testUnsupportedSignatureAlgorithmDER() throws {
let url = Bundle.module.url(
forResource: "rsa_md4",
withExtension: "der",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try Data(contentsOf: url)
XCTAssertThrowsError(try CertificateSigningRequest(derEncoded: Array(bytes)))
}
func testUnsupportedSignatureAlgorithmPEM() throws {
let url = Bundle.module.url(
forResource: "rsa_md4",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
XCTAssertThrowsError(try CertificateSigningRequest(pemEncoded: bytes))
}
func testBadVersion() throws {
let url = Bundle.module.url(
forResource: "bad-version",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
XCTAssertEqual(csr.version, .init(rawValue: 1))
}
func testDuplicateExtension() throws {
let url = Bundle.module.url(
forResource: "two_basic_constraints",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
#if canImport(Darwin)
XCTExpectFailure("Currently don't police extension uniqueness")
XCTAssertThrowsError(try CertificateSigningRequest(pemEncoded: bytes))
#else
// This is temporary: when we fix this, we'll want to invert the conditional!
// Sadly, XCTExpectFailure is not available on Linux.
XCTAssertNoThrow(try CertificateSigningRequest(pemEncoded: bytes))
#endif
}
func testUnknownCriticalExtension() throws {
let url = Bundle.module.url(
forResource: "unsupported_extension_critical",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
guard let extensionRequest = try csr.attributes.extensionRequest else {
XCTFail("No extension request")
return
}
XCTAssertEqual(
extensionRequest.extensions,
try! Certificate.Extensions {
Certificate.Extension(oid: [1, 2, 3, 4], critical: true, value: ArraySlice("value".utf8))
}
)
}
func testUnknownExtension() throws {
let url = Bundle.module.url(
forResource: "unsupported_extension",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
guard let extensionRequest = try csr.attributes.extensionRequest else {
XCTFail("No extension request")
return
}
XCTAssertEqual(
extensionRequest.extensions,
try! Certificate.Extensions {
Certificate.Extension(oid: [1, 2, 3, 4], critical: false, value: ArraySlice("value".utf8))
}
)
}
func testNoExtensions() throws {
let url = Bundle.module.url(
forResource: "challenge-unstructured",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
XCTAssertNil(try csr.attributes.extensionRequest)
}
func testBasicConstraints() throws {
let url = Bundle.module.url(
forResource: "basic_constraints",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
guard let extensionRequest = try csr.attributes.extensionRequest else {
XCTFail("No extension request")
return
}
XCTAssertEqual(
extensionRequest.extensions,
try! Certificate.Extensions {
Critical(
BasicConstraints.isCertificateAuthority(maxPathLength: 1)
)
}
)
}
func testSubjectAlternativeName() throws {
let url = Bundle.module.url(
forResource: "san_rsa_sha1",
withExtension: "der",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try Data(contentsOf: url)
let csr = try CertificateSigningRequest(derEncoded: Array(bytes))
guard let extensionRequest = try csr.attributes.extensionRequest else {
XCTFail("No extension request")
return
}
XCTAssertEqual(
extensionRequest.extensions,
try! Certificate.Extensions {
SubjectAlternativeNames([
.dnsName("cryptography.io"),
.dnsName("sub.cryptography.io"),
])
}
)
}
func testSubjectAlternativeNamePEM() throws {
let url = Bundle.module.url(
forResource: "san_rsa_sha1",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
guard let extensionRequest = try csr.attributes.extensionRequest else {
XCTFail("No extension request")
return
}
XCTAssertEqual(
extensionRequest.extensions,
try! Certificate.Extensions {
SubjectAlternativeNames([
.dnsName("cryptography.io"),
.dnsName("sub.cryptography.io"),
])
}
)
}
func testFreeIPABadCritical() throws {
let url = Bundle.module.url(
forResource: "freeipa-bad-critical",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
XCTAssertThrowsError(try csr.attributes.extensionRequest)
}
func testInvalidSignature() throws {
let url = Bundle.module.url(
forResource: "invalid_signature",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
XCTAssertFalse(csr.publicKey.isValidSignature(csr.signature, for: csr))
}
func testRSASHA256Signature() throws {
let url = Bundle.module.url(
forResource: "rsa_sha256",
withExtension: "der",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try Data(contentsOf: url)
let csr = try CertificateSigningRequest(derEncoded: Array(bytes))
XCTAssertTrue(csr.publicKey.isValidSignature(csr.signature, for: csr))
}
func testRSASHA256SignaturePEM() throws {
let url = Bundle.module.url(
forResource: "rsa_sha256",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: bytes)
XCTAssertTrue(csr.publicKey.isValidSignature(csr.signature, for: csr))
}
func testECDSACSR() throws {
let url = Bundle.module.url(
forResource: "ec_sha256",
withExtension: "der",
subdirectory: "CSR Vectors/cryptography"
)!
let bytes = try Data(contentsOf: url)
let csr = try CertificateSigningRequest(derEncoded: Array(bytes))
XCTAssertEqual(csr.signatureAlgorithm, .ecdsaWithSHA256)
XCTAssertEqual(
csr.subject,
try! DistinguishedName([
.init(type: .NameAttributes.commonName, utf8String: "cryptography.io"),
.init(type: .NameAttributes.organizationName, utf8String: "PyCA"),
.init(type: .NameAttributes.countryName, printableString: "US"),
.init(type: .NameAttributes.stateOrProvinceName, utf8String: "Texas"),
.init(type: .NameAttributes.localityName, utf8String: "Austin"),
])
)
XCTAssertNotNil(P384.Signing.PublicKey(csr.publicKey))
XCTAssertNil(csr.attributes[oid: .CSRAttributes.extensionRequest])
XCTAssertTrue(csr.publicKey.isValidSignature(csr.signature, for: csr))
var serializer = DER.Serializer()
try serializer.serialize(csr)
XCTAssertEqual(Array(bytes), serializer.serializedBytes)
}
func testECDSACSRPEM() throws {
let url = Bundle.module.url(
forResource: "ec_sha256",
withExtension: "pem",
subdirectory: "CSR Vectors/cryptography"
)!
let pemDocument = try String(decoding: Data(contentsOf: url), as: UTF8.self)
let csr = try CertificateSigningRequest(pemEncoded: pemDocument)
XCTAssertEqual(csr.signatureAlgorithm, .ecdsaWithSHA256)
XCTAssertEqual(
csr.subject,
try! DistinguishedName([
.init(type: .NameAttributes.commonName, utf8String: "cryptography.io"),
.init(type: .NameAttributes.organizationName, utf8String: "PyCA"),
.init(type: .NameAttributes.countryName, printableString: "US"),
.init(type: .NameAttributes.stateOrProvinceName, utf8String: "Texas"),
.init(type: .NameAttributes.localityName, utf8String: "Austin"),
])
)
XCTAssertNotNil(P384.Signing.PublicKey(csr.publicKey))
XCTAssertNil(csr.attributes[oid: .CSRAttributes.extensionRequest])
XCTAssertTrue(csr.publicKey.isValidSignature(csr.signature, for: csr))
let reEncoded = try csr.serializeAsPEM()
XCTAssertEqual(
pemDocument.trimmingCharacters(in: .whitespacesAndNewlines),
reEncoded.pemString.trimmingCharacters(in: .whitespacesAndNewlines)
)
}
func testDuplicateAttributesAreRemovedOnInsertion() throws {
var elements = Array(repeating: CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: []), count: 5)
elements.append(CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4, 5], values: [try ASN1Any(erasing: 5)]))
elements.append(CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 6)]))
elements.append(CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 7)]))
let attributes = CertificateSigningRequest.Attributes(elements)
XCTAssertEqual(attributes.count, 2)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 7)])
)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4, 5]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4, 5], values: [try ASN1Any(erasing: 5)])
)
}
func testCanReplaceElementInAttributes() throws {
var attributes = CertificateSigningRequest.Attributes([
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 1)]),
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4, 5], values: [try ASN1Any(erasing: 2)]),
])
attributes[oid: [1, 2, 3, 4]] = CertificateSigningRequest.Attribute(
oid: [1, 2, 3, 4],
values: [try ASN1Any(erasing: 3)]
)
attributes[oid: [1, 2, 3, 4, 5]] = nil
attributes[oid: [4, 3, 2, 1]] = CertificateSigningRequest.Attribute(
oid: [4, 3, 2, 1],
values: [try ASN1Any(erasing: 4)]
)
XCTAssertEqual(attributes.count, 2)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 3)])
)
XCTAssertEqual(
attributes[oid: [4, 3, 2, 1]],
CertificateSigningRequest.Attribute(oid: [4, 3, 2, 1], values: [try ASN1Any(erasing: 4)])
)
}
func testInsertHasTheEffectOfTheSubscript() throws {
var attributes = CertificateSigningRequest.Attributes()
attributes.insert(contentsOf: [
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 1)]),
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4, 5], values: [try ASN1Any(erasing: 2)]),
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 3)]),
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4, 5], values: [try ASN1Any(erasing: 4)]),
])
XCTAssertEqual(attributes.count, 2)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 3)])
)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4, 5]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4, 5], values: [try ASN1Any(erasing: 4)])
)
attributes.insert(CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 5)]))
XCTAssertEqual(attributes.count, 2)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 5)])
)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4, 5]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4, 5], values: [try ASN1Any(erasing: 4)])
)
attributes.insert(CertificateSigningRequest.Attribute(oid: [4, 3, 2, 1], values: [try ASN1Any(erasing: 6)]))
XCTAssertEqual(attributes.count, 3)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 5)])
)
XCTAssertEqual(
attributes[oid: [1, 2, 3, 4, 5]],
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4, 5], values: [try ASN1Any(erasing: 4)])
)
XCTAssertEqual(
attributes[oid: [4, 3, 2, 1]],
CertificateSigningRequest.Attribute(oid: [4, 3, 2, 1], values: [try ASN1Any(erasing: 6)])
)
}
func testCSRAttributeValuesAreOrderIndependentForEqualityAndHashing() throws {
let values: [ASN1Any] = [
try ASN1Any(erasing: 5),
try ASN1Any(erasing: 10),
try ASN1Any(erasing: 15),
]
let options = values.permutations.map { CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: $0) }
for option in options {
// Everything is equal.
XCTAssertTrue(options.allSatisfy({ $0 == option }))
}
let setified = Set(options)
XCTAssertEqual(setified.count, 1)
XCTAssertNotEqual(
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 5)]),
CertificateSigningRequest.Attribute(
oid: [1, 2, 3, 4],
values: [try ASN1Any(erasing: 5), try ASN1Any(erasing: 10)]
)
)
}
func testCSRAttributesAreOrderIndependentForEqualityAndHashing() throws {
let attributes: [CertificateSigningRequest.Attribute] = [
CertificateSigningRequest.Attribute(oid: [1, 2, 3, 4], values: [try ASN1Any(erasing: 5)]),
CertificateSigningRequest.Attribute(oid: [4, 3, 2, 1], values: [try ASN1Any(erasing: 10)]),
CertificateSigningRequest.Attribute(oid: [1, 1, 1, 1], values: [try ASN1Any(erasing: 5)]),
]
let options = attributes.permutations.map { CertificateSigningRequest.Attributes($0) }
for option in options {
// Everything is equal.
XCTAssertTrue(options.allSatisfy({ $0 == option }))
}
let setified = Set(options)
XCTAssertEqual(setified.count, 1)
XCTAssertNotEqual(
CertificateSigningRequest.Attributes(attributes.prefix(1)),
CertificateSigningRequest.Attributes(attributes.prefix(2))
)
}
}
extension RandomAccessCollection {
var permutations: [[Element]] {
// A more efficient implementation would be implemented as a Sequence, but for tests this isn't important
// enough.
//
// For the curious, this is an implementation of QuickPerm in Swift.
var permutations: [[Element]] = []
var working = Array(self)
// Trivial first permutation is the current one.
permutations.append(working)
let n = working.count
var p = Array(0...n)
var i = 1
while i < n {
p[i] -= 1
let j: Int
if i % 2 == 1 {
j = p[i]
} else {
j = 0
}
working.swapAt(i, j)
permutations.append(working)
i = 1
while p[i] == 0 {
p[i] = i
i += 1
}
}
return permutations
}
}
|
