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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftASN1 open source project
//
// Copyright (c) 2021 Apple Inc. and the SwiftASN1 project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftASN1 project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
extension Bool: DERImplicitlyTaggable {
@inlinable
public static var defaultIdentifier: ASN1Identifier {
.boolean
}
@inlinable
public init(derEncoded node: ASN1Node, withIdentifier identifier: ASN1Identifier) throws {
guard node.identifier == identifier else {
throw ASN1Error.unexpectedFieldType(node.identifier)
}
guard case .primitive(let bytes) = node.content, bytes.count == 1 else {
throw ASN1Error.invalidASN1Object(reason: "Invalid content for ASN1Bool")
}
switch bytes[bytes.startIndex] {
case 0:
// Boolean false
self = false
case 0xff:
// Boolean true in DER
self = true
case let byte:
// If we come to support BER then these values are all "true" as well.
throw ASN1Error.invalidASN1Object(reason: "Invalid byte for ASN1Bool: \(byte)")
}
}
@inlinable
public func serialize(into coder: inout DER.Serializer, withIdentifier identifier: ASN1Identifier) throws {
coder.appendPrimitiveNode(identifier: identifier) { bytes in
if self {
bytes.append(0xff)
} else {
bytes.append(0)
}
}
}
}
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