doudong3570
2014-07-30 12:26
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Java端的AES加密 - 在PHP端解密并选择单个密钥

I am using AES and I want to settle for a key which I can use on the Java side to encrypt a string, I hardcode the same key on php side and decrypt the string if the strings match I am authenticated to step inside.

Following is my code in Java:

public class AESencrp {

     private static final String ALGO = "AES";
    private static final byte[] keyValue = 
        new byte[] { 'T', 'h', 'e', 'B', 'e', 's', 't',
'S', 'e', 'c', 'r','e', 't', 'K', 'e', 'y' };

public static String encrypt(String Data) throws Exception {
        Key key = generateKey();
        Cipher c = Cipher.getInstance(ALGO);
        c.init(Cipher.ENCRYPT_MODE, key);
        byte[] encVal = c.doFinal(Data.getBytes());
        String encryptedValue = new BASE64Encoder().encode(encVal);
        return encryptedValue;
    }

    public static String decrypt(String encryptedData) throws Exception {
        Key key = generateKey();
        Cipher c = Cipher.getInstance(ALGO);
        c.init(Cipher.DECRYPT_MODE, key);
        byte[] decordedValue = new BASE64Decoder().decodeBuffer(encryptedData);
        byte[] decValue = c.doFinal(decordedValue);
        String decryptedValue = new String(decValue);
        return decryptedValue;
    }
    private static Key generateKey() throws Exception {
        Key key = new SecretKeySpec(keyValue, ALGO);
        return key;
}

}

Here is the function I use in PHP:

function fnDecrypt()
{
 // echo $_POST['key'];
 $sValue = $_POST['key']; 
 $sSecretKey = "TheBestSecretKey";
    return rtrim(
        mcrypt_decrypt(
            MCRYPT_RIJNDAEL_256, 
            $sSecretKey, 
            base64_decode($sValue), 
            MCRYPT_MODE_CBC,
            mcrypt_create_iv(
                mcrypt_get_iv_size(
                    MCRYPT_RIJNDAEL_256,
                    MCRYPT_MODE_CBC
                ), 
                MCRYPT_RAND
            )
        ), "\0"
    );
}

However it seems, that I always get different decrypted text on php side, I feel the issue is with the key, while as I am hard coding it, this behavior should not occur, any hints?

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