public void RandomIv192()
{
var etmCiphertext1 = RijndaelEtM.Encrypt(Plaintext, Password, KeySize.Aes192);
var etmCiphertext2 = RijndaelEtM.Encrypt(Plaintext, Password, KeySize.Aes192);
var plaintext = RijndaelEtM.Decrypt(etmCiphertext1, Password, KeySize.Aes192);
Assert.Equal(plaintext, Plaintext);
Assert.NotEqual(etmCiphertext1, etmCiphertext2);
}
public static string Decrypt(string cipherText, string passPhrase)
{
string decrypted = RijndaelEtM.Decrypt(cipherText, passPhrase, KeySize.Aes256);
return(decrypted);
/**
* // Get the complete stream of bytes that represent:
* // [32 bytes of Salt] + [32 bytes of IV] + [n bytes of CipherText]
* var cipherTextBytesWithSaltAndIv = Convert.FromBase64String(cipherText);
* // Get the saltbytes by extracting the first 32 bytes from the supplied cipherText bytes.
* var saltStringBytes = cipherTextBytesWithSaltAndIv.Take(Keysize / 8).ToArray();
* // Get the IV bytes by extracting the next 32 bytes from the supplied cipherText bytes.
* var ivStringBytes = cipherTextBytesWithSaltAndIv.Skip(Keysize / 8).Take(Keysize / 8).ToArray();
* // Get the actual cipher text bytes by removing the first 64 bytes from the cipherText string.
* var cipherTextBytes = cipherTextBytesWithSaltAndIv.Skip((Keysize / 8) * 2).Take(cipherTextBytesWithSaltAndIv.Length - ((Keysize / 8) * 2)).ToArray();
*
* using (var password = new Rfc2898DeriveBytes(passPhrase, saltStringBytes, DerivationIterations))
* {
* var keyBytes = password.GetBytes(Keysize / 8);
* using (var symmetricKey = new RijndaelManaged())
* {
* symmetricKey.BlockSize = 256;
* symmetricKey.Mode = CipherMode.CBC;
* symmetricKey.Padding = PaddingMode.PKCS7;
* using (var decryptor = symmetricKey.CreateDecryptor(keyBytes, ivStringBytes))
* {
* using (var memoryStream = new MemoryStream(cipherTextBytes))
* {
* using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
* {
* var plainTextBytes = new byte[cipherTextBytes.Length];
* var decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
* memoryStream.Close();
* cryptoStream.Close();
* return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
* }
* }
* }
* }
* }**/
}
public void Decrypt256()
{
var plaintext = RijndaelEtM.Decrypt(EtmProof256, Password, KeySize.Aes256);
Assert.Equal(plaintext, Plaintext);
}
public void Decrypt192()
{
var plaintext = RijndaelEtM.Decrypt(EtmProof192, Password, KeySize.Aes192);
Assert.Equal(plaintext, Plaintext);
}
public static string Decrypt(string cipherText, string password)
{
return(RijndaelEtM.Decrypt(cipherText, password, KeySize.Aes256));
}
public static string Decrypt(string cipherText, string passPhrase)
{
string decrypted = RijndaelEtM.Decrypt(cipherText, passPhrase, KeySize.Aes256);
return(decrypted);
}