Geoff Weiss has announced the release of Hash Tool v1.3 — Hash Tool (or Tool 128) provides the Apple IIGS with the capability to perform checksum on files and to verify data integrity. Geoff’s announcement is attached:
The Hash Tool has been upgraded to version 1.3 and is now licensed with the standard GNU Public License. New feature: md2 and sha1 support has been added. A big thanks to Mike Stephens for providing Orca/C code as a basis for the md2 and sha1 additions. Source has been included with the archive. Contributions for any additional message digests source code will be accepted to extend this tool set.
Visit http://hashtool.gwlink.net/ for documentation and download.