import SecretKit import CryptoKit struct Stub {} extension Stub { public class Store: SecretStore { public let isAvailable = true public let id = UUID() public let name = "Stub" public var secrets: [Secret] = [] public var shouldThrow = false public init() { // try! create(size: 256) // try! create(size: 384) } public func create(size: Int) throws { let flags: SecAccessControlCreateFlags = [] let access = SecAccessControlCreateWithFlags(kCFAllocatorDefault, kSecAttrAccessibleWhenUnlockedThisDeviceOnly, flags, nil) as Any let attributes = [ kSecAttrLabel: name, kSecAttrKeyType: kSecAttrKeyTypeECSECPrimeRandom, kSecAttrKeySizeInBits: size, kSecPrivateKeyAttrs: [ kSecAttrIsPermanent: true, kSecAttrAccessControl: access ] ] as CFDictionary var privateKey: SecKey! = nil var publicKey: SecKey! = nil SecKeyGeneratePair(attributes, &publicKey, &privateKey) let publicAttributes = SecKeyCopyAttributes(publicKey) as! [CFString: Any] let privateAttributes = SecKeyCopyAttributes(privateKey) as! [CFString: Any] let publicData = (publicAttributes[kSecValueData] as! Data) let privateData = (privateAttributes[kSecValueData] as! Data) let secret = Secret(keySize: size, publicKey: publicData, privateKey: privateData) print(secret) print("Public Key OpenSSH: \(OpenSSHKeyWriter().openSSHString(secret: secret))") } public func sign(data: Data, with secret: Secret, for provenance: SigningRequestProvenance) throws -> Data { guard !shouldThrow else { throw NSError() } let privateKey = SecKeyCreateWithData(secret.privateKey as CFData, [ kSecAttrKeyType: kSecAttrKeyTypeECSECPrimeRandom, kSecAttrKeySizeInBits: secret.keySize, kSecAttrKeyClass: kSecAttrKeyClassPrivate ] as CFDictionary , nil)! let signatureAlgorithm: SecKeyAlgorithm switch secret.keySize { case 256: signatureAlgorithm = .ecdsaSignatureMessageX962SHA256 case 384: signatureAlgorithm = .ecdsaSignatureMessageX962SHA384 default: fatalError() } return SecKeyCreateSignature(privateKey, signatureAlgorithm, data as CFData, nil)! as Data } } } extension Stub { struct Secret: SecretKit.Secret, CustomDebugStringConvertible { let id = UUID().uuidString.data(using: .utf8)! let name = UUID().uuidString let algorithm = Algorithm.ellipticCurve let keySize: Int let publicKey: Data let privateKey: Data init(keySize: Int, publicKey: Data, privateKey: Data) { self.keySize = keySize self.publicKey = publicKey self.privateKey = privateKey } var debugDescription: String { """ Key Size \(keySize) Private: \(privateKey.base64EncodedString()) Public: \(publicKey.base64EncodedString()) """ } } } extension Stub.Store { struct StubError: Error { } }