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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftASN1 open source project
//
// Copyright (c) 2019-2020 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
//
//===----------------------------------------------------------------------===//
import SwiftASN1
/// An ECDSA signature is laid out as follows:
///
/// ECDSASignature ::= SEQUENCE {
/// r INTEGER,
/// s INTEGER
/// }
struct ECDSASignature<IntegerType: ASN1IntegerRepresentable>: DERImplicitlyTaggable {
static var defaultIdentifier: ASN1Identifier {
.sequence
}
var r: IntegerType
var s: IntegerType
init(r: IntegerType, s: IntegerType) {
self.r = r
self.s = s
}
init(derEncoded rootNode: ASN1Node, withIdentifier identifier: ASN1Identifier) throws {
self = try DER.sequence(rootNode, identifier: identifier) { nodes in
let r = try IntegerType(derEncoded: &nodes)
let s = try IntegerType(derEncoded: &nodes)
return ECDSASignature(r: r, s: s)
}
}
func serialize(into coder: inout DER.Serializer, withIdentifier identifier: ASN1Identifier) throws {
try coder.appendConstructedNode(identifier: identifier) { coder in
try coder.serialize(self.r)
try coder.serialize(self.s)
}
}
}
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