I want to perform RSA encryption&Decryption using SecKeyCreateEncryptedData() Method allows public key as SecKey, My back end Java code has been set as encryption using private key & decryption using public key. Here is a java code... @SuppressLint("NewApi") public static String encryptSecretKeyByPrivateKey(String data, String privatekeyPath) throws NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException { byte[] plaintext = data.getBytes(); PrivateKey privateKey = getPrivatekey(privatekeyPath); Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding"); cipher.init(Cipher.ENCRYPT_MODE, privateKey); byte[] encryptedByte = cipher.doFinal(plaintext); return Base64.getEncoder().encodeToString(encryptedByte); } public static PrivateKey getPrivatekey(String key) throws NoSuchAlgorithmException, InvalidKeySpecException { PrivateKey privateKey = null; KeyFactory keyFactory = null; byte[] encoded = DatatypeConverter.parseBase64Binary(key); PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(encoded); keyFactory = KeyFactory.getInstance("RSA"); privateKey = keyFactory.generatePrivate(keySpec); return privateKey; } Can I achieve the same in swift with the help of SecKeyEncrypt() or SecKeyCreateEncryptedData() ?

Does swift have default support for SHA3-256 hashing algorithm for all devices iOS 12 and above?

good morning, I saw one of your old post on decrypting on swift. can you guide me on how you achieved it. any sources will be very welcomed. thank you

let privateKey = Curve25519.KeyAgreement.PrivateKey() let publicKey = privateKey.publicKey than what I do next? my requirement keys are like Public Key: -——BEGIN PUBLIC KEY-----MIIBMTCB6gYHKoZIzj0CATCB3gIBATArBgcqhkjOPQEBAiB/////////////////////////////////////////7TBEBCAqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqYSRShRAQge0Je0Je0Je0Je0Je0Je0Je0Je0Je0Je0JgtenHcQyGQEQQQqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq0kWiCuGaG4oIa04B7dLHdI0UySPU1+bXxhsinpxaJ+ztPZAiAQAAAAAAAAAAAAAAAAAAAAFN753qL3nNZYEmMaXPXT7QIBCANCAARMyjhxmqctNgQJS5yef637I1SMM+Yg9PZ6VKF83hgCDH13bayEHj8I1nEPVO5pfyqATxOcOQS110iA9QJTEpsI-----END PUBLIC KEY----- Private Key: -----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----

I want to generate a Curve25519 key pair with ECDH for the encryption and decryption. I'm using the CryptoKit to generates a keypair. But, I failed to generate a keypair with the ECDH algorithm. func generateKeys() -> (publicKey: String, privateKey: String){ let privateKey = Curve25519.KeyAgreement.PrivateKey() let publicKey = privateKey.publicKey let publicKeyString = "-----BEGIN PUBLIC KEY-----\(publicKey.rawRepresentation.base64EncodedString())-----END PUBLIC KEY-----" print(publicKeyString) let privateKeyString = "-----BEGIN PRIVATE KEY-----\(privateKey.rawRepresentation.base64EncodedString(options: .lineLength64Characters))-----END PRIVATE KEY-----\r\n" print(privateKeyString) return (publicKeyString, [rivateKeyString) } Output: -----BEGIN PUBLIC KEY-----WSOOXYN/FaCOn4SAlvrW3q4IYueiS8Io+WqL64T2QQA=-----END PUBLIC KEY----- -----BEGIN PRIVATE KEY-----AAlH4v1vcnmjEKVJrhbarMqCrcNWYZgFwnhReduEokk=-----END PRIVATE KEY----- Here is one of the Java code using bouncycastle { "privateKey": "-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----", "errorInfo": null, "KeyMaterials": { "cryptoAlg": "ECDH", "curve": "curve25519", "params": "", "DHPublicKey": { "expiry": "2021-12-15T11:29:20.848Z", "Parameter": "", "KeyValue": "-----BEGIN PUBLIC KEY-----MIIBMTCB6gYHKoZIzj0CATCB3gIBATArBgcqhkjOPQEBAiB/////////////////////////////////////////7TBEBCAqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqYSRShRAQge0Je0Je0Je0Je0Je0Je0Je0Je0Je0Je0JgtenHcQyGQEQQQqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq0kWiCuGaG4oIa04B7dLHdI0UySPU1+bXxhsinpxaJ+ztPZAiAQAAAAAAAAAAAAAAAAAAAAFN753qL3nNZYEmMaXPXT7QIBCANCAARuesOo7QMm9k+qILijTeh7yz0HU9DJrPIAnqVudaaG6w0/1n1ySnxa+X0bjWpUvmJA0IIKHO8baWBXp9BC4mMW-----END PUBLIC KEY-----" } } } Can anyone guide me for the same keys like java?

Hi there TL;DR : I have a Data object which contains data that is already hashed. I need a Digest object, how should I proceed ? I am developing an OSX Smart Card Token Extension to handle certificates linked to private keys in the Secure Enclave (using CryptoKit). So far my first tests are pretty successful as my extension already answered to various signature requests successfully... until now. So far I was receiving signature requests for ecdsaSignatureMessageX962SHA256 algorithm. All I had to do with was something like this: func tokenSession(_ session: TKTokenSession, sign dataToSign: Data, keyObjectID: Any, algorithm: TKTokenKeyAlgorithm) throws -> Data { if let privateKey = try? SecureEnclave.P256.Signing.PrivateKey.init(dataRepresentation: keyObjectID as! Data) {       let rawsignature = try? privateKey.signature(for: dataToSign)       return rawsignature!.derRepresentation     } } Now I receive requests for ecdsaSignatureDigestX962SHA256 signatures. I noticed that there is a public func signature<D>(for digest: D) throws -> P256.Signing.ECDSASignature where D : Digest function that can be called but in the tokenSession i am only given Data... Looking at SHA256Digest documentation I can't find anything to create the digest from bytes. It seems that it can only be the result of a SHA256.hash operation. I thought of using older API like SecKeyCreateSignature but I don't think I can retrieve a SecKey from a private key generated with CryptoKit SecureEnclave.P256.Signing.PrivateKey.init I feel like I may be missing something really simple...