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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
// TBSCertificate ::= SEQUENCE {
// version [0] Version DEFAULT v1,
// serialNumber CertificateSerialNumber,
// signature AlgorithmIdentifier,
// issuer Name,
// validity Validity,
// subject Name,
// subjectPublicKeyInfo SubjectPublicKeyInfo,
// issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL,
// -- If present, version MUST be v2 or v3
// subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL,
// -- If present, version MUST be v2 or v3
// extensions [3] Extensions OPTIONAL
// -- If present, version MUST be v3 -- }
//
// Version ::= INTEGER { v1(0), v2(1), v3(2) }
//
// CertificateSerialNumber ::= INTEGER
//
// UniqueIdentifier ::= BIT STRING
//
// Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension
@usableFromInline
typealias UniqueIdentifier = ASN1BitString
@usableFromInline
struct TBSCertificate: DERImplicitlyTaggable, Hashable, Sendable {
@inlinable
static var defaultIdentifier: ASN1Identifier {
.sequence
}
@usableFromInline
var version: Certificate.Version
@usableFromInline
var serialNumber: Certificate.SerialNumber
@usableFromInline
var signature: Certificate.SignatureAlgorithm
@usableFromInline
var issuer: DistinguishedName
@usableFromInline
var validity: Validity
@usableFromInline
var subject: DistinguishedName
@usableFromInline
var publicKey: Certificate.PublicKey
@usableFromInline
var issuerUniqueID: UniqueIdentifier?
@usableFromInline
var subjectUniqueID: UniqueIdentifier?
@usableFromInline
var extensions: Certificate.Extensions
@inlinable
internal init(
version: Certificate.Version,
serialNumber: Certificate.SerialNumber,
signature: Certificate.SignatureAlgorithm,
issuer: DistinguishedName,
validity: Validity,
subject: DistinguishedName,
publicKey: Certificate.PublicKey,
issuerUniqueID: UniqueIdentifier? = nil,
subjectUniqueID: UniqueIdentifier? = nil,
extensions: Certificate.Extensions
) {
self.version = version
self.serialNumber = serialNumber
self.signature = signature
self.issuer = issuer
self.validity = validity
self.subject = subject
self.publicKey = publicKey
self.issuerUniqueID = issuerUniqueID
self.subjectUniqueID = subjectUniqueID
self.extensions = extensions
}
@inlinable
init(derEncoded rootNode: ASN1Node, withIdentifier identifier: ASN1Identifier) throws {
self = try DER.sequence(rootNode, identifier: identifier) { nodes in
let version = try DER.decodeDefaultExplicitlyTagged(
&nodes,
tagNumber: 0,
tagClass: .contextSpecific,
defaultValue: Int(0)
)
guard (0...2).contains(version) else {
throw ASN1Error.invalidASN1Object(reason: "Invalid X.509 version \(version)")
}
let serialNumber = try ArraySlice<UInt8>(derEncoded: &nodes)
let signature = try AlgorithmIdentifier(derEncoded: &nodes)
let issuer = try DistinguishedName(derEncoded: &nodes)
let validity = try Validity(derEncoded: &nodes)
let subject = try DistinguishedName(derEncoded: &nodes)
let subjectPublicKeyInfo = try SubjectPublicKeyInfo(derEncoded: &nodes)
let issuerUniqueID = try DER.optionalExplicitlyTagged(&nodes, tagNumber: 1, tagClass: .contextSpecific) {
try UniqueIdentifier(derEncoded: $0)
}
let subjectUniqueID = try DER.optionalExplicitlyTagged(&nodes, tagNumber: 2, tagClass: .contextSpecific) {
try UniqueIdentifier(derEncoded: $0)
}
let extensions = try DER.optionalExplicitlyTagged(&nodes, tagNumber: 3, tagClass: .contextSpecific) {
try DER.sequence(of: Certificate.Extension.self, identifier: .sequence, rootNode: $0)
}
return TBSCertificate(
version: Certificate.Version(rawValue: version),
serialNumber: Certificate.SerialNumber(bytes: serialNumber),
signature: Certificate.SignatureAlgorithm(algorithmIdentifier: signature),
issuer: issuer,
validity: validity,
subject: subject,
publicKey: try Certificate.PublicKey(spki: subjectPublicKeyInfo),
issuerUniqueID: issuerUniqueID,
subjectUniqueID: subjectUniqueID,
extensions: try Certificate.Extensions(extensions ?? [])
)
}
}
@inlinable
func serialize(into coder: inout DER.Serializer, withIdentifier identifier: ASN1Identifier) throws {
try coder.appendConstructedNode(identifier: identifier) { coder in
if self.version != .v1 {
try coder.serialize(self.version.rawValue, explicitlyTaggedWithTagNumber: 0, tagClass: .contextSpecific)
}
try coder.serialize(self.serialNumber.bytes)
try coder.serialize(AlgorithmIdentifier(self.signature))
try coder.serialize(self.issuer)
try coder.serialize(self.validity)
try coder.serialize(self.subject)
try coder.serialize(SubjectPublicKeyInfo(self.publicKey))
if let issuerUniqueID = self.issuerUniqueID {
try coder.serialize(issuerUniqueID, explicitlyTaggedWithTagNumber: 1, tagClass: .contextSpecific)
}
if let subjectUniqueID = self.subjectUniqueID {
try coder.serialize(subjectUniqueID, explicitlyTaggedWithTagNumber: 2, tagClass: .contextSpecific)
}
if self.extensions.count > 0 {
try coder.serialize(explicitlyTaggedWithTagNumber: 3, tagClass: .contextSpecific) { coder in
try coder.serializeSequenceOf(extensions)
}
}
}
}
}
|
