a document (a buffer of ASCII bytes) which has the CRC32 hash (the gzip variant of CRC32), of 0xbbd1264f

Question

so i had a homework to get a document (a buffer of ASCII bytes) which has the CRC32 hash (the gzip variant of CRC32), of 0xbbd1264f and unti now i don't know how to get it so if someone know how to do that please answer

Answer 1

From your question, I think you mean generating collision for crc32 with your document.

You can find a lot of articles about creating crc32 collisions. For example you can see it here, here or here.

Answer 2

spoof will calculate what bits out of a provided candidate set to invert in order to force the CRC to the desired value.