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AES Encryption Java & # 8594; PHP & # 8594; Java

In my Android application, I communicate with a web service, data sent and sent is encrypted using AES encryption.

So, I do the following. I am sending AES encoded base64 encoded AES encoding to share.php file

Share.php decrypts this string and inserts it into the database. After that, PHP will encrypt en encode the response.

My Android app then needs to be decrypted to decrypt this message.

But decrypting the PHP response is not very good.

This is mine AES.java:

public class AES {
private final String characterEncoding = "UTF-8";
private final String cipherTransformation = "AES/ECB/PKCS5Padding";
private final String aesEncryptionAlgorithm = "AES";

public  byte[] decrypt(byte[] cipherText, byte[] key, byte [] initialVector) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException
{
    Cipher cipher = Cipher.getInstance(cipherTransformation);
    SecretKeySpec secretKeySpecy = new SecretKeySpec(key, aesEncryptionAlgorithm);
    //IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector);
    //cipher.init(Cipher.DECRYPT_MODE, secretKeySpecy, ivParameterSpec);
    cipher.init(Cipher.DECRYPT_MODE, secretKeySpecy);
    System.out.println("Do final: "+cipherText);

    cipherText = cipher.doFinal(cipherText);
    return cipherText;
}

public  byte[] encrypt(byte[] plainText, byte[] key, byte [] initialVector) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException
{
    Cipher cipher = Cipher.getInstance(cipherTransformation);
    SecretKeySpec secretKeySpec = new SecretKeySpec(key, aesEncryptionAlgorithm);
    //IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector);
    //cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec);
    cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
    plainText = cipher.doFinal(plainText);
    return plainText;
}

private byte[] getKeyBytes(String key) throws UnsupportedEncodingException{
    byte[] keyBytes= new byte[16];
    byte[] parameterKeyBytes= key.getBytes(characterEncoding);
    System.arraycopy(parameterKeyBytes, 0, keyBytes, 0, Math.min(parameterKeyBytes.length, keyBytes.length));
    return keyBytes;
}

/// <summary>
/// Encrypts plaintext using AES 128bit key and a Chain Block Cipher and returns a base64 encoded string
/// </summary>
/// <param name="plainText">Plain text to encrypt</param>
/// <param name="key">Secret key</param>
/// <returns>Base64 encoded string</returns>
public String encrypt(String plainText, String key) throws UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException{
    byte[] plainTextbytes = plainText.getBytes(characterEncoding);
    byte[] keyBytes = getKeyBytes(key);
    //return Base64.encodeToString(encrypt(plainTextbytes,keyBytes, keyBytes), Base64.DEFAULT);
    return Base64.encodeToString(encrypt(plainTextbytes,keyBytes, new byte[0]), Base64.DEFAULT);
}

/// <summary>
/// Decrypts a base64 encoded string using the given key (AES 128bit key and a Chain Block Cipher)
/// </summary>
/// <param name="encryptedText">Base64 Encoded String</param>
/// <param name="key">Secret Key</param>
/// <returns>Decrypted String</returns>
public String decrypt(String encryptedText, String key) throws KeyException, GeneralSecurityException, GeneralSecurityException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, IOException{
    byte[] cipheredBytes = Base64.decode(encryptedText, Base64.DEFAULT);
    byte[] keyBytes = getKeyBytes(key);
    //return new String(decrypt(cipheredBytes, keyBytes, keyBytes), characterEncoding);
    return new String(decrypt(cipheredBytes, keyBytes, new byte[0]), characterEncoding);
}

}

And this is the code for encoding an en encrypt response in PHP:

function mc_encrypt($encrypt, $mc_key) {
    $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB), MCRYPT_RAND);
    $passcrypt = trim(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $mc_key, trim($encrypt), MCRYPT_MODE_ECB, $iv));
    $encode = base64_encode($passcrypt);
    return $encode;
}

function mc_decrypt($decrypt, $mc_key) {
    $decoded = base64_decode($decrypt);
    $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB), MCRYPT_RAND);
    $decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $mc_key, trim($decoded), MCRYPT_MODE_ECB, $iv));
    return $decrypted;
}

I assume that the settings for PHP encryption do not match the settings for the Java part. Can

I get the following error:

03-12 13:44:09.661: W/System.err(15717): javax.crypto.BadPaddingException: pad block corrupted
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HTTPS , .

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