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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
//
//===----------------------------------------------------------------------===//
#if CRYPTO_IN_SWIFTPM && !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
@_exported import CryptoKit
#else
import Foundation
extension ASN1 {
struct SubjectPublicKeyInfo: ASN1ImplicitlyTaggable {
static var defaultIdentifier: ASN1.ASN1Identifier {
.sequence
}
var algorithmIdentifier: RFC5480AlgorithmIdentifier
var key: ASN1.ASN1BitString
init(asn1Encoded rootNode: ASN1.ASN1Node, withIdentifier identifier: ASN1.ASN1Identifier) throws {
// The SPKI block looks like this:
//
// SubjectPublicKeyInfo ::= SEQUENCE {
// algorithm AlgorithmIdentifier,
// subjectPublicKey BIT STRING
// }
self = try ASN1.sequence(rootNode, identifier: identifier) { nodes in
let algorithmIdentifier = try ASN1.RFC5480AlgorithmIdentifier(asn1Encoded: &nodes)
let key = try ASN1.ASN1BitString(asn1Encoded: &nodes)
return SubjectPublicKeyInfo(algorithmIdentifier: algorithmIdentifier, key: key)
}
}
private init(algorithmIdentifier: RFC5480AlgorithmIdentifier, key: ASN1.ASN1BitString) {
self.algorithmIdentifier = algorithmIdentifier
self.key = key
}
internal init(algorithmIdentifier: RFC5480AlgorithmIdentifier, key: [UInt8]) {
self.algorithmIdentifier = algorithmIdentifier
self.key = ASN1BitString(bytes: key[...])
}
func serialize(into coder: inout ASN1.Serializer, withIdentifier identifier: ASN1.ASN1Identifier) throws {
try coder.appendConstructedNode(identifier: identifier) { coder in
try coder.serialize(self.algorithmIdentifier)
try coder.serialize(self.key)
}
}
}
struct RFC5480AlgorithmIdentifier: ASN1ImplicitlyTaggable, Hashable {
static var defaultIdentifier: ASN1.ASN1Identifier {
.sequence
}
var algorithm: ASN1.ASN1ObjectIdentifier
var parameters: ASN1.ASN1Any?
init(algorithm: ASN1.ASN1ObjectIdentifier, parameters: ASN1.ASN1Any?) {
self.algorithm = algorithm
self.parameters = parameters
}
init(asn1Encoded rootNode: ASN1.ASN1Node, withIdentifier identifier: ASN1.ASN1Identifier) throws {
// The AlgorithmIdentifier block looks like this.
//
// AlgorithmIdentifier ::= SEQUENCE {
// algorithm OBJECT IDENTIFIER,
// parameters ANY DEFINED BY algorithm OPTIONAL
// }
//
// ECParameters ::= CHOICE {
// namedCurve OBJECT IDENTIFIER
// -- implicitCurve NULL
// -- specifiedCurve SpecifiedECDomain
// }
//
// We don't bother with helpers: we just try to decode it directly.
self = try ASN1.sequence(rootNode, identifier: identifier) { nodes in
let algorithmOID = try ASN1.ASN1ObjectIdentifier(asn1Encoded: &nodes)
let parameters = nodes.next().map { ASN1.ASN1Any(asn1Encoded: $0) }
return .init(algorithm: algorithmOID, parameters: parameters)
}
}
func serialize(into coder: inout ASN1.Serializer, withIdentifier identifier: ASN1.ASN1Identifier) throws {
try coder.appendConstructedNode(identifier: identifier) { coder in
try coder.serialize(self.algorithm)
if let parameters = self.parameters {
try coder.serialize(parameters)
}
}
}
}
}
// MARK: Algorithm Identifier Statics
extension ASN1.RFC5480AlgorithmIdentifier {
static let ecdsaP256 = ASN1.RFC5480AlgorithmIdentifier(algorithm: .AlgorithmIdentifier.idEcPublicKey,
parameters: try! .init(erasing: ASN1.ASN1ObjectIdentifier.NamedCurves.secp256r1))
static let ecdsaP384 = ASN1.RFC5480AlgorithmIdentifier(algorithm: .AlgorithmIdentifier.idEcPublicKey,
parameters: try! .init(erasing: ASN1.ASN1ObjectIdentifier.NamedCurves.secp384r1))
static let ecdsaP521 = ASN1.RFC5480AlgorithmIdentifier(algorithm: .AlgorithmIdentifier.idEcPublicKey,
parameters: try! .init(erasing: ASN1.ASN1ObjectIdentifier.NamedCurves.secp521r1))
}
#endif // Linux or !SwiftPM
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