I am trying to decrypt in JAVA a string that was encrypted in C#. In c# the decryption is succesffull with this method:
AesCryptoServiceProvider aesProvider = new AesCryptoServiceProvider();
aesProvider.BlockSize = 128;
aesProvider.KeySize = 128;
aesProvider.Key = strKey;
aesProvider.IV = strIV;
aesProvider.Padding = PaddingMode.PKCS7;
aesProvider.Mode = CipherMode.CBC;
ICryptoTransform cryptoTransform = aesProvider.CreateDecryptor(aesProvider.Key, aesProvider.IV);
byte[] DecryptedBytes = cryptoTransform.TransformFinalBlock(EncryptedBytes, 0, EncryptedBytes.Length);
return System.Text.Encoding.UTF8.GetString(DecryptedBytes);
What I am trying to do is convert this method to JAVA (Android), this is what I have tried, but get an error message ("Pad block corrupted"):
try
{
byte[] IV = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 };
byte[] KEY = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 };
SecretKeySpec key = new SecretKeySpec(KEY, "AES/CBC/PKCS7Padding");
Cipher cipher = Cipher.getInstance ("AES/CBC/PKCS7Padding");
cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(IV));
byte[] bytesData = Utilities.Base64Coder.decode(data);
Log.i("bytesData", String.valueOf(bytesData.length));
String strResult = new String(cipher.doFinal(bytesData));
Log.i("decrypted string", strResult);
return strResult;
}
catch (Exception e) {
Log.i("decrypted FAILED", e.getMessage());
return null;
}
10X :)
For whom ever search and get to this question - this code works fine, the problem was with the key that was different between c# and Java.
GregS - 10X for raising my attention to check it again.
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