What to pass in cipher.doFinal in Android/Java?

Question

Android code

String apiResponse = "EcUZvMif

Method:

protected void decryptDataWithAES(String apiResponse, String key) {
        try {
            es(StandardCharsets.UTF_8);


            byte[] decodedResult = Base64.decode(apiResponse, Base64.NO_WRAP);

           terSpec = new IvParameterSpec(first16ByteArray);

            SecretKeySpec skey = new SecretKeySpec(byteArray, "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(DECRYPT_MODE, skey, ivParameterSpec);

            String decryptString = new String(cipher.doFinal(byteArray), StandardCharsets.UTF_8);
            showLog("JSON: " + decryptString);

        } catch (Exception e) {
            e.printStackTrace();

        }
    }

Exception: javax.crypto.BadPaddingException: error:1e000065:Cipher functions:OPENSSL_internal:BAD_DECRYPT

[wefopwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwefpwfpkpewfpkoewfkowf ewfwefwef]bhdfuiyh

Answer 1

You are trying to decrypt the "key", I think you need to decrypt the apiResponse

Also you need the exact same IV the message was encrypted with, otherwise you won't be able to decrypt