Android AES encryption key

David R.

I am developing an android application and I want to use AES-128 for encryption. I use hex for the key and text.

I use this website: http://testprotect.com/appendix/AEScalc , calculate the AES encryption with the following key: "c4dcc3c6ce0acaec4327b6098260b0be", and the text to be encrypted is: "6F4B1B252A5F0C3F2992E1A65E56E5B8" (hex).

So the result from this site gives me "859499d0802de8cc6ba4f208da648a8f" which is what I want to get. http://hpics.li/d89105a

I found some code online, but many use seeds to generate random keys and I want to fix the keys. Actually, I am using the following code, which I think is the code I need, but the result is giving me D/resultdebug: 72adc67b6d11e1c5fb89ddf5faeb0e030686b91f8bfaf6c41335f08955343f87, it is not the same site as I want.

 String text16 = "6F4B1B252A5F0C3F2992E1A65E56E5B8";
    String secret16 = "c4dcc3c6ce0acaec4327b6098260b0be";

    SecretKeySpec sks = new SecretKeySpec(secret16.getBytes(),"AES");
    Cipher c = Cipher.getInstance("AES");

    c.init(Cipher.ENCRYPT_MODE, sks);
    c.update(text16.getBytes());
    byte[] ciphertext = c.doFinal();
    Log.d("resultdebug",new String(Hex.encode(ciphertext), "ASCII"));

Could you please tell me what's wrong, thanks.

Zaff

Instead of converting hex to binary, you get the binary of the character, not the hex-encoded value.

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