Somebody posting as thewhizkid complained to the comp.compression newsgroup that he just couldn’t figure out how to do a CRC calculation. He got a couple of good pointers here, including one to the zlib code, and another including a bit of Java that could do the job. I’ll add a pointer to my ancient-but-still-cogent article from DDJ,

File Verification Using CRC to the mix. Between the three choices, I hope the poster was able to get a handle on the mysterious CRC.

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=31b3e6e5.0303042023.78
52ba26%40posting.google.com