Reversing CRC32

Question

I\'m looking for a way to reverse a CRC32 checksum. There are solutions around, but they are either badly written, extremely technical and/or in Assembly. Assembly is (curre

Answer 1

You can reverse it by backing out the bits to generate the original 32 bits if you know the poly it was created with. But if you are looking to reverse the CRC32 from a given file and append a series of bytes at the end of the file to match the original CRC I posted code on this thread in PHP:

I spent a bit of time on it so I hope it can assist someone working on tougher problems: Reversing CRC32 Cheers!