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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
//
//===----------------------------------------------------------------------===//
/// An ASN1 NULL represents nothing.
public struct ASN1Null: DERImplicitlyTaggable, Hashable, Sendable {
@inlinable
public static var defaultIdentifier: ASN1Identifier {
.null
}
/// Construct a new ASN.1 null.
@inlinable
public init() {}
@inlinable
public init(derEncoded node: ASN1Node, withIdentifier identifier: ASN1Identifier) throws {
guard node.identifier == identifier, case .primitive(let content) = node.content else {
throw ASN1Error.unexpectedFieldType(node.identifier)
}
guard content.count == 0 else {
throw ASN1Error.invalidASN1Object(reason: "ASN1Null must be empty, received \(content.count) bytes")
}
}
@inlinable
public func serialize(into coder: inout DER.Serializer, withIdentifier identifier: ASN1Identifier) {
coder.appendPrimitiveNode(identifier: identifier, { _ in })
}
}
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