public static byte[] AESGCMEncrypt(byte[] data, byte[] key, byte[] iv)
{
var keyParamWithIV = new Org.BouncyCastle.Crypto.Parameters.ParametersWithIV(new Org.BouncyCastle.Crypto.Parameters.KeyParameter(key), iv, 0, 16);
var cipher = Org.BouncyCastle.Security.CipherUtilities.GetCipher("AES/GCM/NoPadding");
cipher.Init(true, keyParamWithIV);
return(cipher.DoFinal(data));
}
public byte[] ofbDecoding(byte[] key, byte[] message, byte[] iv)
{
Crypto.Engines.AesEngine engine = new Crypto.Engines.AesEngine();
Crypto.Modes.OfbBlockCipher blockCipher = new Crypto.Modes.OfbBlockCipher(engine, 128);
Crypto.Paddings.PaddedBufferedBlockCipher cipher = new Crypto.Paddings.PaddedBufferedBlockCipher(blockCipher);
Crypto.Parameters.KeyParameter keyParam = new Crypto.Parameters.KeyParameter(key);
Crypto.Parameters.ParametersWithIV keyParamWithIV = new Crypto.Parameters.ParametersWithIV(keyParam, iv);
cipher.Init(false, keyParamWithIV);
byte[] comparisonBytes = new byte[cipher.GetOutputSize(message.Length)];
int length = cipher.ProcessBytes(message, comparisonBytes, 0);
cipher.DoFinal(comparisonBytes, length);
return(comparisonBytes);
}
public static byte[] AESGCMEncrypt(byte[] data, byte[] key)
{
byte[] iv = AESGenerateIV(16);
var keyParamWithIV = new Org.BouncyCastle.Crypto.Parameters.ParametersWithIV(new Org.BouncyCastle.Crypto.Parameters.KeyParameter(key), iv, 0, 16);
var cipher = Org.BouncyCastle.Security.CipherUtilities.GetCipher("AES/GCM/NoPadding");
cipher.Init(true, keyParamWithIV);
var encryptedData = cipher.DoFinal(data);
using (var stream = new System.IO.MemoryStream())
{
using (var writer = new System.IO.BinaryWriter(stream))
{
writer.Write(iv);
writer.Write(encryptedData);
}
return(stream.ToArray());
}
}
public static byte[] AESGCMDecrypt(byte[] data, byte[] key)
{
byte[] iv;
byte[] encryptedData;
using (var stream = new System.IO.MemoryStream(data))
{
using (var reader = new System.IO.BinaryReader(stream))
{
iv = reader.ReadBytes(16);
encryptedData = reader.ReadBytes(data.Length - 16);
}
}
var keyParamWithIV = new Org.BouncyCastle.Crypto.Parameters.ParametersWithIV(new Org.BouncyCastle.Crypto.Parameters.KeyParameter(key), iv, 0, 16);
var cipher = Org.BouncyCastle.Security.CipherUtilities.GetCipher("AES/GCM/NoPadding");
cipher.Init(false, keyParamWithIV);
return(cipher.DoFinal(encryptedData));
}
} // End Function Sha3
// https://www.programcreek.com/java-api-examples/index.php?api=org.bouncycastle.crypto.engines.SerpentEngine
// https://stackoverflow.com/questions/9806012/multiple-encryption-with-bouncycastle
public static void Poly1305Tests()
{
// https://www.programcreek.com/java-api-examples/index.php?api=org.bouncycastle.crypto.engines.TwofishEngine
var poly = new Org.BouncyCastle.Crypto.Macs.Poly1305(new Org.BouncyCastle.Crypto.Engines.SerpentEngine());
poly.Init(null);
var se = new Org.BouncyCastle.Crypto.Engines.Salsa20Engine();
var pwiv = new Org.BouncyCastle.Crypto.Parameters.ParametersWithIV(
new Org.BouncyCastle.Crypto.Parameters.KeyParameter(new byte[16])
, new byte[8]
);
// https://en.wikipedia.org/wiki/Salsa20
var xse = new Org.BouncyCastle.Crypto.Engines.XSalsa20Engine();
var xsekp = new Org.BouncyCastle.Crypto.Parameters.ParametersWithIV(
new Org.BouncyCastle.Crypto.Parameters.KeyParameter(new byte[32])
, new byte[24]
);
var engine = new Org.BouncyCastle.Crypto.Engines.RC4Engine();
byte[] key = System.Text.Encoding.UTF8.GetBytes("foobar");
engine.Init(true, new Org.BouncyCastle.Crypto.Parameters.KeyParameter(key));
Org.BouncyCastle.Crypto.Engines.TwofishEngine twofish = new Org.BouncyCastle.Crypto.Engines.TwofishEngine();
twofish.Init(true, new Org.BouncyCastle.Crypto.Parameters.KeyParameter(key));
new Org.BouncyCastle.Crypto.Engines.ThreefishEngine(1024);
Org.BouncyCastle.Crypto.BufferedBlockCipher cipher =
new Org.BouncyCastle.Crypto.BufferedBlockCipher(new Org.BouncyCastle.Crypto.Engines.TwofishEngine());
}
