namespace Renci.SshNet.Security.Cryptography { public abstract class Cipher { public abstract byte MinimumSize { get; } public virtual int TagSize { get; } public byte[] Encrypt(byte[] input); public abstract byte[] Encrypt(byte[] input, int offset, int length); public virtual byte[] Decrypt(byte[] input); public abstract byte[] Decrypt(byte[] input, int offset, int length); protected Cipher(); } }