Java

AES Encryption ECB Mode with PKCS7 Padding

See more Encryption Examples

Duplicates the following C# code:

public static byte[] DecryptBySymmetricKey(string encryptedText, byte[] key)
  {
     string keyAsBase64 = Convert.ToBase64String(key);

     byte[] dataToDecrypt = Convert.FromBase64String(encryptedText);
     var keyBytes = key;
     AesManaged tdes = new AesManaged();
     tdes.KeySize = 256;
     tdes.BlockSize = 128;
     tdes.Key = keyBytes;
     tdes.Mode = CipherMode.ECB;
     tdes.Padding = PaddingMode.PKCS7;
     ICryptoTransform decrypt__1 = tdes.CreateDecryptor();
     byte[] deCipher = decrypt__1.TransformFinalBlock(dataToDecrypt, 0, dataToDecrypt.Length);
     tdes.Clear();
     string EK_result = Convert.ToBase64String(deCipher);
     return EK_result;
}

Chilkat2 Java

import com.chilkatsoft.chilkat2.Crypt2;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Crypt2 crypt = new Crypt2();

        // In the C# code above that is to be duplicated here, use the base64 encoded key.
        String keyAsBase64 = "...";
        String encryptedBytesAsBase64 = "....";

        crypt.setKeyLength(256);
        crypt.setCryptAlgorithm("AES");
        crypt.setCipherMode("ecb");
        crypt.setPaddingScheme(0);
        crypt.setEncodedKey(keyAsBase64, "base64");

        crypt.setEncodingMode("base64");

        // Pass the base64 representation of the encrypted data.
        // (The EncodingMode indicates you are passing base64.)
        String EK_result = crypt.decryptStringENC(encryptedBytesAsBase64);

        System.out.println(EK_result);
    }
}