ProFTPD module implementing the XCRC, XMD5, XSHA1, and XSHA256 commands,
for calculating the digests (a.k.a checksums) of files on the FTP server.
These can be used by FTP clients for verifying that the files that have been
uploaded (or downloaded) match exactly the files on the server.
See the mod_digest.html documentation for more details.
The mod_digest module is now distributed with the ProFTPD source code; this repo is now archived.