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www.waraxe.us Forum Index -> Newbies corner -> Zinio
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PostPosted: Fri Oct 15, 2010 8:00 pm Reply with quote
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Joined: Sep 25, 2010
Posts: 5

I`m tring to read the zinio magazines for free, I managed to download the full magazine in 2 different ways the zno file to be read offline ( wich I think is impossible to open it needs a dsa signature)
The online file is a zip file with all the thubnails and swf pages to be read online. But this swf files are some how encoded ( I`m starting to believe they are pdf) the online reader needs a key for each page like 0824c615632de28d8a19ab702599d1dd2695a40afd874fd868725619d32fa69a for page 0

Since I have all the pages and the keys for page 0 and 1 is it possible to get the other files key?

Has any one messed around with zinio and can give me a few tips thanks.

Here is the online files http://rapidshare.com/files/425297743/416141596.zip



Ithink that the functioon to decode is this:

package com.zinio.crypto
    import flash.utils.*;

    public class Drm11Decryptor extends Object implements IDecryptor
        private var cipher:ICipher;
        private static const ZNO_HEADER_LENGTH:int = 5;
        private static const PREPEND_PACKING_LENGTH:int = 1024;
        private static const HEAD_ENCRYPTED_LENGTH:int = 2048;
        private static const TAIL_ENCRYPTED_LENGTH:int = 1024;
        private static const CLEAR_LENGTH:int = 60;
        private static const ENCRYPTED_LENGTH:int = 8;

        public function Drm11Decryptor()
        }// end function

        public function decrypt(param1:ByteArray, param2:ByteArray) : ByteArray
            var _loc_4:uint;
            var _loc_7:uint;
            var _loc_8:uint;
            var _loc_3:uint;
            var _loc_5:* = new ByteArray();
            var _loc_6:uint;
            if (this.cipher == null)
                this.cipher = new Arc4Cipher();
            this.cipher.init(CipherMode.DECRYPT, param1);
            _loc_3 = _loc_3 + ZNO_HEADER_LENGTH;
            _loc_4 = Math.min(param2.length - _loc_3, HEAD_ENCRYPTED_LENGTH);
            _loc_6 = _loc_6 + this.cipher.update(param2, _loc_3, _loc_4, _loc_5, _loc_6);
            _loc_3 = _loc_3 + _loc_4;
            while (param2.length - _loc_3 > TAIL_ENCRYPTED_LENGTH)
                _loc_5.position = _loc_6;
                _loc_5.writeBytes(param2, _loc_3, CLEAR_LENGTH);
                _loc_6 = _loc_6 + CLEAR_LENGTH;
                _loc_3 = _loc_3 + CLEAR_LENGTH;
                _loc_6 = _loc_6 + this.cipher.update(param2, _loc_3, ENCRYPTED_LENGTH, _loc_5, _loc_6);
                _loc_3 = _loc_3 + ENCRYPTED_LENGTH;
            _loc_7 = param2.length - _loc_3;
            this.cipher.update(param2, _loc_3, _loc_7, _loc_5, _loc_6);
            var _loc_9:* = new ByteArray();
            new ByteArray().writeBytes(_loc_5, PREPEND_PACKING_LENGTH, 0);
            return _loc_9;
        }// end function

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