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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 -------
-------- END GRY SIGNATURE --------


If you find SigWrtTl useful, please consider helping the Gryphel Project, of which it is a part.

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copyright (c) 2018 Paul C. Pratt - last update 10/20/2018