hash

toy reimplementation of common hashing algorithms

usage

hash

• hash provided string or file using crc32, md5, sha1, sha256, or all of the above
• compile with make or make dev (if you want to poke around the binary)

test

• not of much use to the user, but it hashes known strings and compares them against the known correct hash to verify the algorithm implementation
• compile with make test

sources

CRC32

• https://www.w3.org/TR/png/#D-CRCAppendix
• https://users.ece.cmu.edu/~koopman/crc/index.html
• https://fuchsia.googlesource.com/third_party/wuffs/+/HEAD/std/crc32/README.md

MD5

• https://datatracker.ietf.org/doc/html/rfc1321
• https://cs.indstate.edu/~fsagar/doc/paper.pdf
• https://github.com/Zunawe/md5-c/

SHA1

• https://datatracker.ietf.org/doc/html/rfc3174
• https://github.com/clibs/sha1

SHA256

• https://datatracker.ietf.org/doc/html/rfc6234
• https://github.com/B-Con/crypto-algorithms/blob/master/sha256.c