SigWrtTl-1.01.zip (57K) a zipped hfs disk image and checksum file. The disk image can be mounted with Mini vMac. Includes source code.
SigWrtTl is a command line version of SigWrite. It can be used in Macintosh Programmer’s Workshop to automate creating digital signatures. It is written to be platform independent, using the C standard library, and would probably be easy to port to other platforms (but that is not supported).
It takes three arguments: First, a path to a file contained a message to be signed. Second, a path to a file containing a secret key, in ascii armored format. And third, a path to a new output file in which to put the signed message.
SigWrtTl is in part descended from MacPGP source code, which, as far as I can tell, allows derived works for noncommercial use.
Here is the md5 checksum for the download, signed with Gryphel Key 5:
--------- GRY SIGNED TEXT --------- 757a695fde185fceb6131d5e65276282 SigWrtTl-1.01.zip ------- BEGIN GRY SIGNATURE ------- Gry/4Xa8CFcUzxdN/NR+XtA5N7yDydifGmerpis7tA3FX2zcFzrUee9aUXkb17ja iWhLoLm9u7k5V9s74ebYnRO8U/Yck+C6BXvqH4nP37ceffA/YodO1I+h9HfrjsF4 BAs8mjOD45JvfwpB67ol4smVWzyV00QBaVmPlPLv3MyybSVpaQZ3jNSEcp06wV5M -------- END GRY SIGNATURE --------
If you find SigWrtTl useful, please consider helping the Gryphel Project, of which it is a part.