public static String DecryptFromHexString(this AesManaged aes, String source, String key)
{
var bkey = Settings.KeyEncoding.GetBytes(key);
var bb = aes.Decrypt(HexStringToByte(source), bkey, bkey);
return(Settings.Encoding.GetString(bb));
}
public void TestAesAlgorithm()
{
var provider = new AesManaged();
provider.Key = new Byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F };
provider.IV = new Byte[] { 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00 };
provider.Padding = PaddingMode.Zeros;
provider.Mode = CipherMode.CBC;
var encodedData = provider.Encrypt(_clearData);
var decodedData = provider.Decrypt(encodedData);
CollectionAssert.AreEqual(_clearData, decodedData);
}
public static byte[] DecryptUseAes(this byte[] bytes, byte[] key, byte[] iv,
CipherMode mode = CipherMode.CBC,
PaddingMode padding = PaddingMode.PKCS7)
{
using (var aes = new AesManaged()
{
IV = iv,
Key = key,
Mode = mode,
Padding = padding
})
{
return(aes.Decrypt(bytes));
}
}
public static byte[] DecryptUseAes(this byte[] bytes, byte[] key, byte[] iv,
CipherMode mode = CipherMode.CBC,
PaddingMode padding = PaddingMode.PKCS7)
{
using (var aes = new AesManaged()
{
IV = iv,
Key = key,
Mode = mode,
Padding = padding
})
{
return aes.Decrypt(bytes);
}
}
internal async Task _Receiver()
{
while (_cancel.IsCancellationRequested == false)
{
var buf = await _socket.ReceiveAsyncExt();
var rec = Received;
if (rec == null)
{
continue;
}
var res = _aes.Decrypt(buf);
var pkt = new LinkPacket().LoadValue(res);
var arg = new LinkEventArgs <LinkPacket>(pkt);
rec.Invoke(this, arg);
}
}
public static void EncryptDecryptKnownECB192()
{
byte[] plainTextBytes =
new ASCIIEncoding().GetBytes("This is a sentence that is longer than a block, it ensures that multi-block functions work.");
byte[] encryptedBytesExpected = new byte[]
{
0xC9, 0x7F, 0xA5, 0x5B, 0xC3, 0x92, 0xDC, 0xA6,
0xE4, 0x9F, 0x2D, 0x1A, 0xEF, 0x7A, 0x27, 0x03,
0x04, 0x9C, 0xFB, 0x56, 0x63, 0x38, 0xAE, 0x4F,
0xDC, 0xF6, 0x36, 0x98, 0x28, 0x05, 0x32, 0xE9,
0xF2, 0x6E, 0xEC, 0x0C, 0x04, 0x9D, 0x12, 0x17,
0x18, 0x35, 0xD4, 0x29, 0xFC, 0x01, 0xB1, 0x20,
0xFA, 0x30, 0xAE, 0x00, 0x53, 0xD4, 0x26, 0x25,
0xA4, 0xFD, 0xD5, 0xE6, 0xED, 0x79, 0x35, 0x2A,
0xE2, 0xBB, 0x95, 0x0D, 0xEF, 0x09, 0xBB, 0x6D,
0xC5, 0xC4, 0xDB, 0x28, 0xC6, 0xF4, 0x31, 0x33,
0x9A, 0x90, 0x12, 0x36, 0x50, 0xA0, 0xB7, 0xD1,
0x35, 0xC4, 0xCE, 0x81, 0xE5, 0x2B, 0x85, 0x6B,
};
byte[] aes192Key = new byte[]
{
0xA6, 0x1E, 0xC7, 0x54, 0x37, 0x4D, 0x8C, 0xA5,
0xA4, 0xBB, 0x99, 0x50, 0x35, 0x4B, 0x30, 0x4D,
0x6C, 0xFE, 0x3B, 0x59, 0x65, 0xCB, 0x93, 0xE3,
};
using (var alg = new AesManaged())
{
// The CipherMode and KeySize are different than the default values; this ensures the type
// forwards the state properly to Aes.
alg.Mode = CipherMode.ECB;
alg.Key = aes192Key;
byte[] encryptedBytes = alg.Encrypt(plainTextBytes);
Assert.Equal(encryptedBytesExpected, encryptedBytes);
byte[] decryptedBytes = alg.Decrypt(encryptedBytes);
Assert.Equal(plainTextBytes, decryptedBytes);
}
}
public static void EncryptDecryptKnownECB192()
{
byte[] plainTextBytes =
new ASCIIEncoding().GetBytes("This is a sentence that is longer than a block, it ensures that multi-block functions work.");
byte[] encryptedBytesExpected = new byte[]
{
0xC9, 0x7F, 0xA5, 0x5B, 0xC3, 0x92, 0xDC, 0xA6,
0xE4, 0x9F, 0x2D, 0x1A, 0xEF, 0x7A, 0x27, 0x03,
0x04, 0x9C, 0xFB, 0x56, 0x63, 0x38, 0xAE, 0x4F,
0xDC, 0xF6, 0x36, 0x98, 0x28, 0x05, 0x32, 0xE9,
0xF2, 0x6E, 0xEC, 0x0C, 0x04, 0x9D, 0x12, 0x17,
0x18, 0x35, 0xD4, 0x29, 0xFC, 0x01, 0xB1, 0x20,
0xFA, 0x30, 0xAE, 0x00, 0x53, 0xD4, 0x26, 0x25,
0xA4, 0xFD, 0xD5, 0xE6, 0xED, 0x79, 0x35, 0x2A,
0xE2, 0xBB, 0x95, 0x0D, 0xEF, 0x09, 0xBB, 0x6D,
0xC5, 0xC4, 0xDB, 0x28, 0xC6, 0xF4, 0x31, 0x33,
0x9A, 0x90, 0x12, 0x36, 0x50, 0xA0, 0xB7, 0xD1,
0x35, 0xC4, 0xCE, 0x81, 0xE5, 0x2B, 0x85, 0x6B,
};
byte[] aes192Key = new byte[]
{
0xA6, 0x1E, 0xC7, 0x54, 0x37, 0x4D, 0x8C, 0xA5,
0xA4, 0xBB, 0x99, 0x50, 0x35, 0x4B, 0x30, 0x4D,
0x6C, 0xFE, 0x3B, 0x59, 0x65, 0xCB, 0x93, 0xE3,
};
using (var alg = new AesManaged())
{
// The CipherMode and KeySize are different than the default values; this ensures the type
// forwards the state properly to Aes.
alg.Mode = CipherMode.ECB;
alg.Key = aes192Key;
byte[] encryptedBytes = alg.Encrypt(plainTextBytes);
Assert.Equal(encryptedBytesExpected, encryptedBytes);
byte[] decryptedBytes = alg.Decrypt(encryptedBytes);
Assert.Equal(plainTextBytes, decryptedBytes);
}
}