digest

digest copied to clipboard

digest is a tiny program to compute various kinds of digests. digest is designed to be a drop-in-replacement for the following utilities: sum, cksum, shasum, sha1sum, sha224sum, and sha256sum. It is capable of computing a wide range of checksums. See digest.1 for more details.

digest should compile on any unixoid platform. The code uses only C89 language features, some C99 headers (stdint.h) and POSIX functions. The only non-standard function digest uses is alloca(). digest assumes that alloca is declared in <stdlib.h>.

In cksum mode, digest mostly obeys POSIX, except for the fact that it still supports all its flags, even though POSIX states that cksum takes no flags.

This program installs itself as a series of hardlinks for all the programs it can emulate. If you want to add or remove digests, edit main.c and remove the appropriate lines from digests.