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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftCrypto open source project
//
// Copyright (c) 2019-2020 Apple Inc. and the SwiftCrypto project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.md for the list of SwiftCrypto project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
#if CRYPTO_IN_SWIFTPM && !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
@_exported import CryptoKit
#else
import Foundation
extension Curve25519.Signing {
static var keyByteCount: Int {
return 32
}
}
extension Curve25519 {
/// A mechanism used to create or verify a cryptographic signature using
/// Ed25519.
public enum Signing {
#if !CRYPTO_IN_SWIFTPM_FORCE_BUILD_API
typealias Curve25519PrivateKeyImpl = Curve25519.Signing.CoreCryptoCurve25519PrivateKeyImpl
typealias Curve25519PublicKeyImpl = Curve25519.Signing.CoreCryptoCurve25519PublicKeyImpl
#else
typealias Curve25519PrivateKeyImpl = Curve25519.Signing.OpenSSLCurve25519PrivateKeyImpl
typealias Curve25519PublicKeyImpl = Curve25519.Signing.OpenSSLCurve25519PublicKeyImpl
#endif
/// A Curve25519 private key used to create cryptographic signatures.
public struct PrivateKey: ECPrivateKey {
private var baseKey: Curve25519.Signing.Curve25519PrivateKeyImpl
/// Creates a random Curve25519 private key for signing.
public init() {
self.baseKey = Curve25519.Signing.Curve25519PrivateKeyImpl()
}
/// The corresponding public key.
public var publicKey: PublicKey {
return PublicKey(baseKey: self.baseKey.publicKey)
}
/// Creates a Curve25519 private key for signing from a data
/// representation.
///
/// - Parameters:
/// - data: A representation of the key as contiguous bytes from
/// which to create the key.
public init<D: ContiguousBytes>(rawRepresentation data: D) throws {
self.baseKey = try Curve25519.Signing.Curve25519PrivateKeyImpl(rawRepresentation: data)
}
/// The raw representation of the key as a collection of contiguous
/// bytes.
public var rawRepresentation: Data {
return self.baseKey.rawRepresentation
}
var key: SecureBytes {
return self.baseKey.key
}
}
/// A Curve25519 public key used to verify cryptographic signatures.
public struct PublicKey {
private var baseKey: Curve25519.Signing.Curve25519PublicKeyImpl
/// Creates a Curve25519 public key from a data representation.
///
/// - Parameters:
/// - rawRepresentation: A representation of the key as contiguous
/// bytes from which to create the key.
public init<D: ContiguousBytes>(rawRepresentation: D) throws {
self.baseKey = try Curve25519.Signing.Curve25519PublicKeyImpl(rawRepresentation: rawRepresentation)
}
fileprivate init(baseKey: Curve25519.Signing.Curve25519PublicKeyImpl) {
self.baseKey = baseKey
}
/// A representation of the public key.
public var rawRepresentation: Data {
return self.baseKey.rawRepresentation
}
var keyBytes: [UInt8] {
return self.baseKey.keyBytes
}
}
}
}
#endif // Linux or !SwiftPM
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