/// <summary>
/// CFB decode.
/// </summary>
/// <param name="key">Key</param>
/// <param name="iv">Init vector</param>
/// <param name="message">Message</param>
/// <param name="sBlockType">SBlock type</param>
/// <returns>Decoded</returns>
public static byte[] Decode(byte[] key, byte[] iv, byte[] message, SBlockTypes sBlockType)
{
CheckData(key, iv, message);
using var gost = new GostManager(key, iv, message, CipherTypes.Cfb, sBlockType);
return(gost.Decode());
}
/// <summary>
/// Substitution decode.
/// </summary>
/// <param name="key">Key</param>
/// <param name="message">Message</param>
/// <param name="sBlockType">SBlock type</param>
/// <returns>Decoded</returns>
public static byte[] Decode(byte[] key, byte[] message, SBlockTypes sBlockType)
{
CheckData(key, message);
if (message.Length % 8 != 0)
{
throw new ArgumentException("Block must have 64 bit length");
}
using var gost = new GostManager(key, null, message, CipherTypes.Substitution, sBlockType);
return(gost.Decode());
}