Cannot convert byte[] to byte . When I want to return public and private keys byte[] keys = new byte[] { publicKey, privateKey }; Writes Cannot implicitly convert type 'byte []' to 'byte'. How can I fix this?

 using System; using System.Security.Cryptography; using System.Text; namespace RSAviaConsole { class Program { private static RSAParameters publicKey; private static RSAParameters privateKey; static void Main(string[] args) { Console.Write("Текс для шифрования: \n"); string message = Console.ReadLine(); Console.WriteLine(); Console.Write("Размер ключей: \n"); int Key_size = Convert.ToInt32(Console.ReadLine()); Console.WriteLine(); byte[] keys = GenerateKeys(Key_size); byte[] encrypted = Encrypt(Encoding.UTF8.GetBytes(message), keys, Key_size); byte[] decrypted = Decrypt(encrypted, keys, Key_size); Console.WriteLine("Зашифрованный текст:\n{0}\n", BitConverter.ToString(encrypted).Replace("-","")); Console.WriteLine("Расшифрованный текст:\n{0}\n", Encoding.UTF8.GetString(decrypted)); Console.ReadLine(); } static byte[] GenerateKeys(int Key_size) { using (var rsa = new RSACryptoServiceProvider(Key_size)) { rsa.PersistKeyInCsp = false; byte[] publicKey = rsa.ExportCspBlob(false); byte[] privateKey = rsa.ExportCspBlob(true); string PrivateKey = Convert.ToBase64String(privateKey); string PublicKey = Convert.ToBase64String(publicKey); Console.WriteLine("Открытый ключ:\n{0}\n", PrivateKey); Console.WriteLine("Закрытый ключ:\n{0}\n", PublicKey); byte[] keys = new byte[] { publicKey, privateKey }; return keys; } } static byte[] Encrypt(byte[] input, byte[] keys, int Key_size) { byte[] encrypted; using (var rsa = new RSACryptoServiceProvider(Key_size)) { rsa.PersistKeyInCsp = false; rsa.ImportCspBlob(keys); encrypted = rsa.Encrypt(input, true); } return encrypted; } static byte[] Decrypt(byte[] input, byte[] keys, int Key_size) { byte[] decrypted; using (var rsa = new RSACryptoServiceProvider(Key_size)) { rsa.PersistKeyInCsp = false; rsa.ImportCspBlob(keys); decrypted = rsa.Decrypt(input, true); } return decrypted; } } }
  • Where does the error occur? - free_ze
  • When I want to return public and private keys byte[] keys = new byte[] { publicKey, privateKey }; - MegaRoks
  • Signatures are different. You want to get an array of bytes, and as elements you give arrays again. The result is an array of byte arrays. - adrug
  • And how do I transfer the keys to Main then? - MegaRoks
  • Please do not delete the question when the answer is already given. Both can be useful to future readers. This is the essence and meaning of StackOverflow. - Nick Volynkin ♦

1 answer 1

The error is that the method should return byte[] , but an attempt is made to return byte[][]

In this case, you can use tuples

 static (byte[] PublicKey, byte[] PrivateKey) GenerateKeys(int Key_size){ ... return (publicKey, privateKey) }

And when calling:

 var (PublickKey, PrivateKey) = GenerateKeys(Key_size);

Then you can use the variables PublickKey, PrivateKey directly.