Decryption in zip file

crc32(key(0),char)

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2 Replies - 2686 Views - Last Post: 08 June 2005 - 11:43 AM Rate Topic: -----

#1 michaelfung  Icon User is offline

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Decryption in zip file

Posted 08 June 2005 - 02:44 AM

hi, i'm currently making a php to unzip zip files on a server. I've come accross some zip files that is encrypted with traditional PKWARE Encryption.
Although this document provides the pseudo code to decrypt the files, i cannot successfully change it into php. The main problem is that it needs a function called crc32(key(0),char) and i don't know how to write this function out. Please help me. Thank you very much.

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#2 Nova Dragoon  Icon User is offline

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Re: Decryption in zip file

Posted 08 June 2005 - 08:14 AM

PHP has a crc32 function, however it does not take 2 arguments

http://us3.php.net/crc32
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#3 michaelfung  Icon User is offline

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Re: Decryption in zip file

Posted 08 June 2005 - 11:43 AM

I've tried crc32(str1.str2) and crc32(str2.str1) but both of them do not give a correct result. :crazy:
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