CODEWITHSUNDEEP
actionscript-3encryptionaes
Tom
Tom

Reputation: 5974

How to use AES-CBC 128-bit encryption in AS3?

I would like to encrypt a string in AS3 with AES-CBC 128-bit. How to do it?

Upvotes: 0

Views: 3323

Answers (1)

gMirian
gMirian

Reputation: 651

Use AS3Crypto https://code.google.com/p/as3crypto/, here is the snippet:

//notice that decrKey and decrIV length must be 16 chars long! ex: 1234567890123456
private function encrypt(input:String,decrKey:String,decrIV:String):String
{
    var inputBA:ByteArray=Hex.toArray(Hex.fromString(input));        
    var key:ByteArray = Hex.toArray(Hex.fromString(decrKey));                
    var pad:IPad = new NullPad();
    var aes:ICipher = Crypto.getCipher("aes-cbc", key, pad);
    var ivmode:IVMode = aes as IVMode;
    ivmode.IV = Hex.toArray(Hex.fromString(decrIV));            
    aes.encrypt(inputBA);  

    return Base64.encodeByteArray( inputBA);  //if not use Base64 encode, data would be just byteArray
}

Notice: this code is fully compatible ex: with PHP (or C#), here is decryption for it in PHP

//notice that $key and $iv length must be 16 chars long! ex: 1234567890123456
function decrypt($data,$key,$iv)
{

    $decr= mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, base64_decode($data), MCRYPT_MODE_CBC, $iv);    
    return $decr;   
}

Upvotes: 2

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