crc32 with given parameters

Question

I have to create a crc32 sum over a file. But there are some dependencies:

crc32 with the polynom 0x04C11DB7
Init of the crc with 0xffffffff 
and a final XOR with 0xffffffff

How can i get this working?

Answer 1

That is the standard CRC-32 used by zip, gzip, zlib, etc. You can simply use the crc32() function in zlib.