namespace Renci.SshNet.Security.Cryptography { public abstract class SymmetricCipher : Cipher { protected byte[] Key { get; } protected SymmetricCipher(byte[] key); public abstract int EncryptBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset); public abstract int DecryptBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset); } }