The encryption is in java:
String salt = "DC14DBE5F917C7D03C02CD5ADB88FA41";
String password = "25623F17-0027-3B82-BB4B-B7DD60DCDC9B";
char[] passwordChars = new char[password.length()];
password.getChars(0,password.length(), passwordChars, 0);
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec spec = new PBEKeySpec(passwordChars, salt.getBytes(), 2, 256);
SecretKey sKey = factory.generateSecret(spec);
byte[] raw = _sKey.getEncoded();
String toEncrypt = "The text to be encrypted.";
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");
cipher.init(Cipher.ENCRYPT_MODE, skey);
AlgorithmParameters params = cipher.getParameters();
byte[] initVector = params.getParameterSpec(IvParameterSpec.class).getIV();
byte[] encryptedBytes = cipher.doFinal(toEncrypt.getBytes());
While the decryption is in c#:
string hashAlgorithm = "SHA1";
int passwordIterations = 2;
int keySize = 256;
byte[] saltValueBytes = Encoding.ASCII.GetBytes( salt );
byte[] cipherTextBytes = Convert.FromBase64String( cipherText );
PasswordDeriveBytes passwordDB = new PasswordDeriveBytes(password, saltValueBytes, hashAlgorithm passwordIterations );
byte[] keyBytes = passwordDB.GetBytes( keySize / 8 );
RijndaelManaged symmetricKey = new RijndaelManaged();
symmetricKey.Mode = CipherMode.CBC;
ICryptoTransform decryptor = symmetricKey.CreateDecryptor( keyBytes, initVector );
MemoryStream memoryStream = new MemoryStream( cipherTextBytes );
CryptoStream cryptoStream = new CryptoStream( memoryStream, decryptor, CryptoStreamMode.Read );
byte[] plainTextBytes = new byte[ cipherTextBytes.Length ];
int decryptedByteCount = cryptoStream.Read( plainTextBytes, 0, plainTextBytes.Length );
memoryStream.Close();
cryptoStream.Close();
string plainText = Encoding.UTF8.GetString( plainTextBytes, 0, decryptedByteCount );
The decryption failed with exception "Padding is invalid and cannot be removed."
Any idea what might be the problem?
This generally indicates that decryption has failed. I suggest you check the output of the key generation functions, to see if you are actually using the same key. I notice, for instance, that the Java code implies you are using a SHA1-based HMAC, whereas the .NET code implies you are using an unkeyed SHA1 hash to generate the key.
Alternatively, it could be a mismatch in the padding. I don't see where you are explicitly setting the PaddingMode
to PKCS7 in the .NET code.
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