aes

I have to make an app in JS which encodes a message with AES and passes it to a server via AJAX. Then the server and decodes the message using Java. My question is: How to encrypt a message in JS and be able to decrypt it in Java using AES? Knowing that the communication between java and js is already established via webservices Client-side, I use the Crypto JS library ( http://code.google.com/p/crypto-js/ ). Server-side I use the Cipher class provided with Java (I use the Java Play framework but it doesn't matter here). I'm totally new to cryptography. I've made researches all day long and

When i check /proc/crypto it shows me: abhi@ubuntu:/proc$ cat crypto name : stdrng driver : krng module : kernel priority : 200 refcnt : 1 selftest : passed type : rng seedsize : 0 name : md5 driver : md5-generic module : kernel priority : 0 refcnt : 1 selftest : passed type : shash blocksize : 64 digestsize : 16 I need to use aes256 for one of my projects. Can someone point out how I can add this algo to crypto api or is there any other way i can achieve this in (ubuntu 10.4, 2.6.32-35). Is there a list of supported (by default) algorithms that are implemented with the cryptoapi for kernel 2

Getting problem with encrypt using js CryptoJS and decrypt that using python crypto.Cipher This is my implementation in js, append iv with encrypted message and encode with base64 <script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js"></script> <script> var message='Secreat Message to Encrypt'; var key = CryptoJS.enc.Hex.parse('824601be6c2941fabe7fe256d4d5a2b7'); var iv = CryptoJS.enc.Hex.parse('1011121314151617'); var encrypted = CryptoJS.AES.encrypt(message, key, { iv: iv, mode: CryptoJS.mode.CBC }); encrypted =encrypted.toString(); encrypted = iv+encrypted;

I'm doing some work with AES CBC and openssl and for now, I'm stuck on a problem that i cannot guess what's wrong (as always). Given a message less than 16 bytes length the process of encryption and decryption works fine, but when the message is greater than 16 bytes the decryption works only on the 16th first bytes. When i call aes.exe stackoverflow stackoverflow the output is: Using: IVector = |000102030405060708090a0b0c0d0e0f| Key = |737461636b6f766572666c6f770d0e0f101112131415161718191a1b1c1d1e1f| Encrypted = |6c65219594c0dae778f9b5e84f018db6| Encrypting : stackoverflow With Key :

I know MAC is 4 first byte of last block encryption, and found this CMAC explanation here but it's kinda hard to understand. And maybe there are already some CMAC AES questions but I'm sorry I can't understand it well. Anyone can explain how to calculate CMAC? and if necessary with some example code in C#. Thanks First you need to derive two subkeys from your AES key. The algorithm is described well in RFC4493 , but I will include some code samples here for reference. For this, you will need the AESEncrypt function, which you can write using dotNet AesCryptoServiceProvider : byte[] AESEncrypt