Aes javascript加密 - java解密

Question

I'm trying to encrypt a message in javascript (using crypto-js library) and to decrypt it in java.

This is the javascript code:

var key = CryptoJS.enc.Utf8.parse(aesPassword);
var ive  = CryptoJS.enc.Utf8.parse(aesIv);
var encryptedData = CryptoJS.AES.encrypt(dataToEncrypt, key, {mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7, iv: ive});

And this is the java code:

final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        final SecretKeySpec key = new SecretKeySpec(aesPassword().getBytes("UTF-8"), "AES");
        cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(aesIv().getBytes("UTF-8")));
        byte[] decrypted = cipher.doFinal(DatatypeConverter.parseBase64Binary(message));

But when I try to decrypt in Java this exception is thrown: javax.crypto.BadPaddingException: Given final block not properly padded

password: 6h2faBePVxpgyFSN iv: NKOzRKrmEMKs1kE4 data to encrypt: "{token: cMGOIrYlJm9lPhPW}"

Any help?

Thanks in advance

Answer 1

I may be wrong, but I think BadPaddingException in this case means that you don't possess the correct key to successfully perform the decryption.The exception essentially means that the key is either too short or too long (I think).

Try{
    String decrypted = aes.decrypt(...);
    System.out.println(decryted);
}catch(Exception e){

}

Something like the code above may work, as System.out is only reached when the BadPaddingException isn't caught, this could be used in a loop when trying possible keys for decryption, for example, if you were trying to calculate all possible keys for the decryption.