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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftCertificates open source project
//
// Copyright (c) 2022 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 SwiftASN1
/// ``OCSPSignature`` is defined in ASN.1 as:
/// ```
/// Signature ::= SEQUENCE {
/// signatureAlgorithm AlgorithmIdentifier,
/// signature BIT STRING,
/// certs [0] EXPLICIT SEQUENCE OF Certificate OPTIONAL }
/// ```
struct OCSPSignature: DERImplicitlyTaggable, Hashable {
static var defaultIdentifier: ASN1Identifier {
.sequence
}
var algorithmIIdentifier: AlgorithmIdentifier
var signature: ASN1BitString
var certs: [Certificate]?
init(algorithmIIdentifier: AlgorithmIdentifier, signature: ASN1BitString, certs: [Certificate]? = nil) {
self.algorithmIIdentifier = algorithmIIdentifier
self.signature = signature
self.certs = certs
}
init(derEncoded: ASN1Node, withIdentifier identifier: ASN1Identifier) throws {
self = try DER.sequence(derEncoded, identifier: identifier) { nodes in
let algorithmIdentifier = try AlgorithmIdentifier(derEncoded: &nodes)
let signature = try ASN1BitString(derEncoded: &nodes)
let certs = try DER.optionalExplicitlyTagged(&nodes, tagNumber: 0, tagClass: .contextSpecific) { node in
try DER.sequence(of: Certificate.self, identifier: .sequence, rootNode: node)
}
return .init(algorithmIIdentifier: algorithmIdentifier, signature: signature, certs: certs)
}
}
func serialize(into coder: inout DER.Serializer, withIdentifier identifier: ASN1Identifier) throws {
try coder.appendConstructedNode(identifier: identifier) { coder in
try self.algorithmIIdentifier.serialize(into: &coder)
try self.signature.serialize(into: &coder)
if let certs = self.certs {
try coder.serialize(explicitlyTaggedWithTagNumber: 0, tagClass: .contextSpecific) { coder in
try coder.serializeSequenceOf(certs)
}
}
}
}
}
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