Hi,
Am Freitag, 15. Dezember 2006 01:35 schrieb 김영일:
I want to decrypt data. but, Result data(decrypted data) don't same input
data.
What's problem?. My code is a bottom.
* C#.NET Encrypt function
private string EncryptString(string InputText, string Password)
{
RijndaelManaged RijndaelCipher = new RijndaelManaged();
RijndaelCipher.Mode = CipherMode.ECB;
byte[] PlainText = System.Text.Encoding.Unicode.GetBytes(InputText);
byte[] Salt = Encoding.ASCII.GetBytes(Password.Length.ToString());
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);
ICryptoTransform Encryptor =
RijndaelCipher.CreateEncryptor(SecretKey.GetBytes(32),
SecretKey.GetBytes(16)); MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, Encryptor,
CryptoStreamMode.Write); cryptoStream.Write(PlainText, 0,
PlainText.Length);
cryptoStream.FlushFinalBlock();
byte[] CipherBytes = memoryStream.ToArray();
memoryStream.Close();
cryptoStream.Close();
string EncryptedData = Convert.ToBase64String(CipherBytes);
return EncryptedData;
}
* PHP(mcrypt) Decrypt function
function decrypt($decrypt,$key) {
$decoded = base64_decode($decrypt);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256,
MCRYPT_MODE_ECB), strlen($key)); $decrypted =
mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $decoded, MCRYPT_MODE_ECB, $iv);
return $decrypted;
}
I'm not familiar with C# and not very with PHP, but to me it looks
like you're using a different IV for decrypting than for encrypting.
That won't work.
Bye,
Peter
--
Peter Conrad Tel: +49 6102 / 80 99 072
[ t]ivano Software GmbH Fax: +49 6102 / 80 99 071
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