title: AES128 encoding in iOS4+
body: <p>I'm new to encrypting in iOS and i'm stuck with AES128 encryption. Is there some pre-built library (perhaps OpenSSL) which i can use easily? </p>
  
  <p>If so, how do I implement it and use it? Are there tutorials? </p>
  
  <p>I've found several "easy" tutorials how to build OpenSSL and import it to Xcode, but none of them worked for me. Also, it needs to be compatible with iOS4, so solution via CommonCrypto doesn't seem to be a solution (since several essential methods are only iOS 5+ compatible).</p>
  
  <p>Thanks for any kind of help, i'm pulling my hair out over this :)</p>