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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 SwiftASN1
extension ASN1ObjectIdentifier {
/// Cryptographic Message Syntax (CMS) Data.
///
/// ASN.1 definition:
/// ```
/// id-data OBJECT IDENTIFIER ::= { iso(1) member-body(2)
/// us(840) rsadsi(113549) pkcs(1) pkcs7(7) 1 }
/// ```
@usableFromInline
static let cmsData: ASN1ObjectIdentifier = [1, 2, 840, 113549, 1, 7, 1]
/// Cryptographic Message Syntax (CMS) Signed Data.
///
/// ASN.1 definition:
/// ```
/// id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
/// us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
/// ```
@usableFromInline
static let cmsSignedData: ASN1ObjectIdentifier = [1, 2, 840, 113549, 1, 7, 2]
}
/// ``ContentInfo`` is defined in ASN.1 as:
/// ```
/// ContentInfo ::= SEQUENCE {
/// contentType ContentType,
/// content [0] EXPLICIT ANY DEFINED BY contentType }
/// ContentType ::= OBJECT IDENTIFIER
/// ```
@usableFromInline
struct CMSContentInfo: DERImplicitlyTaggable, Hashable, Sendable {
@inlinable
static var defaultIdentifier: ASN1Identifier {
.sequence
}
@usableFromInline
var contentType: ASN1ObjectIdentifier
@usableFromInline
var content: ASN1Any
@inlinable
init(contentType: ASN1ObjectIdentifier, content: ASN1Any) {
self.contentType = contentType
self.content = content
}
@inlinable
init(derEncoded rootNode: ASN1Node, withIdentifier identifier: ASN1Identifier) throws {
self = try DER.sequence(rootNode, identifier: identifier) { nodes in
let contentType = try ASN1ObjectIdentifier(derEncoded: &nodes)
let content = try DER.explicitlyTagged(&nodes, tagNumber: 0, tagClass: .contextSpecific) { node in
ASN1Any(derEncoded: node)
}
return .init(contentType: contentType, content: content)
}
}
@inlinable
func serialize(into coder: inout DER.Serializer, withIdentifier identifier: ASN1Identifier) throws {
try coder.appendConstructedNode(identifier: identifier) { coder in
try coder.serialize(contentType)
try coder.serialize(explicitlyTaggedWithTagNumber: 0, tagClass: .contextSpecific) { coder in
try coder.serialize(content)
}
}
}
}
extension CMSContentInfo {
@inlinable
init(_ signedData: CMSSignedData) throws {
self.contentType = .cmsSignedData
self.content = try ASN1Any(erasing: signedData)
}
@inlinable
var signedData: CMSSignedData? {
get throws {
guard contentType == .cmsSignedData else {
return nil
}
return try CMSSignedData(asn1Any: content)
}
}
}
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