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7.6 KiB
HTML
1 line
7.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<title> SigWrite </title>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="canonical" href="index.html">
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</head>
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<body>
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<div>
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<i> <a href="https://www.gryphel.com/index.html">www.gryphel.com</a>/c/<a href="../../index.html">minivmac</a>/<a href="../index.html">extras</a>/sigwrite
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- <a href="https://www.gryphel.com/c/feedback.html">feedback</a> </i>
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</div>
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<hr>
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<h2 align=center>
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SigWrite
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</h2>
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<hr>
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<p> Download </p>
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<blockquote>
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<p> <a href="https://www.gryphel.com/d/minivmac/extras/sigwrite/sigwrite-1.2.0.zip">sigwrite-1.2.0.zip</a>
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(111K) a zipped hfs disk image and checksum file.
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The disk image can be mounted with Mini vMac.
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Includes source code.
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</p>
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</blockquote>
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<p>
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SigWrite is a tool for creating digital signatures that can be checked
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with the
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<a href="../sigcheck/index.html">SigCheck</a>
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tool. Public and secret
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key pairs for these tools can be created with
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<a href="../makekeys/index.html">MakeKeys</a>.
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</p>
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<p> <img src="https://www.gryphel.com/d/minivmac/extras/sigwrite/screen.gif" width=514 height=344 border=0 alt="Screenshot"> </p>
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<p> To use SigWrite, launch the application, and in the editing window
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that appears, paste in a message to be signed. For example: </p>
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<blockquote>
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<pre>
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Twas brillig, and the slithy toves
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did gyre and gimble in the wabe:
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All mimsy were the borogoves,
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and the mome raths outgrabe.
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</pre>
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</blockquote>
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<p>
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Copy all of the indented text above. Then paste it into SigWrite,
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which requires getting the clipboard into the emulated Macintosh, if
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SigWrite is run inside Mini vMac. You can get
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text into the emulated Macintosh using the “Host Paste”
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command in the Edit Menu of SigWrite. It is like the “Paste” command,
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except that it uses the clipboard of the real computer instead
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of the clipboard of the emulated computer. The keyboard shortcut
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is Command-Option-V. (The “Host Paste” command has
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similar effect to using
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<a href="../clipin/index.html">ClipIn</a>
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and then the normal “Paste” command.)
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</p>
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<p> Then click on the status bar, at the bottom
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of the window below the editing area.
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(Choosing the ‘Go’ command from the File menu,
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of the emulated Macintosh, will also work. The keyboard shortcut
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is Command-G.) </p>
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<p>
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The editing area is cleared. Next paste in a secret key
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to sign the message with. (One can be created with
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<a href="../makekeys/index.html">MakeKeys</a>).
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For example (and only as example,
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normally a secret key should never be given to anyone
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else):
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</p>
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<blockquote>
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<pre>
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----- BEGIN GRY SECRET KEY -----
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Gry+SKAIAAA/AXuKqWsF8Rh5Ie4/vORBnTxYf8FPpRl/n6hpgDgfJ5MAOsAEyePE
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nSfjmL3I9emNTuW/iCIHlCl/WkaWyMQZ+NDb1ZsnSLyOKwOycVkR3JwJbUamM4wy
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jUuoWV6jzuhqWZobpGPMSN4B3ivHXtcNVm5SVmnAL13T4FCLnx+TxaYRAQAB9n9N
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yEapaUzZs3Pdv2zNzs77wWHev2/i0qAIFxBLWI5VvPd6NuXEefADAtAJHhzm9koz
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gWrLZ9pVF+D537ewv3/mZJPGS0u7Ino5F3AQ20NhDvX3JwovUSgUkmy59PbJgZ2M
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0zNCvKuephFJbT4Pgi2oc7ZT/qZagkNNDErbyLb7NvBAU6+Ezbb2ejBd0C7s5tM4
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Eu8DD8MJUOdZXctnyzF4F0Nz+TG+NtqN/0Ks8OGUCRysWLyciQ6iej7+vivHhLxr
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wPBA26XYQmRphwlwz6n+VNzd9huh29Ak12ZwgeNpkyO1LIdueVUu6f+sUJYx1Hlg
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tkHwE6ax3jPN+5osKOQ8/0Pg3fY/8CwOIpqLB6QDLCtY2ZrfM69mWkw/QTyGNSDU
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FIkI5corJbgms5mGMGQ2CyEZZ3RjzDtP5YwVAdzd4oNdKLHsK+k4nA==
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------ END GRY SECRET KEY ------
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</pre>
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</blockquote>
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<p>
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Before continuing, it would be a good idea to set Mini vMac to
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<a href="../../hardware.html#processor">All Out speed</a>.
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Then, on a modern computer, SigWrite should
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take less than ten seconds to run (for a 1024 bit key, as
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in this example).
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At 1x speed, or on a real Macintosh Plus, it takes much longer.
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The code of SigWrite is intended to be simple
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to understand and maintain, as opposed to fast.
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</p>
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<p>
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Again, click on the status bar. After a while, if
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all is well, the edit area is replaced with the signed text:
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</p>
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<blockquote>
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<pre>
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--------- GRY SIGNED TEXT ---------
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Twas brillig, and the slithy toves
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did gyre and gimble in the wabe:
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All mimsy were the borogoves,
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and the mome raths outgrabe.
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------- BEGIN GRY SIGNATURE -------
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Gry/AXuKqWsF8Rh5/Bb045yIowANlvp/V/ymKoDa55Wb7dW/xGfPmca8oLw+Rv9d
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cSQpcL+XpzESnWqpK/uNg7lTIe4wdOzo1/s6bHU0u27J+A5EngkYQiAMHeETq6Nx
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DM8viQbkNx2UZrDxyOLCGXW1N4txMktyjC3DYzRMH/oKBVHxgP6B2j8sipEgp3Zf
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-------- END GRY SIGNATURE --------
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</pre>
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</blockquote>
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<p>
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When SigWrite is run inside Mini vMac, you can get
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text out of the emulated Macintosh using the “Host Copy”
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command in the Edit Menu. It is like the “Copy” command,
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except that it uses the clipboard of the real computer instead
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of the clipboard of the emulated computer. The keyboard shortcut
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is Command-Option-C. (The “Host Copy” command has
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similar effect to using the normal “Copy” command and then
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<a href="../clipout/index.html">ClipOut</a>.)
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</p>
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<p>
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SigWrite is in part descended from MacPGP source code, which, as far as
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I can tell, allows derived works for noncommercial use. <!-- SigWrite is
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generally compatible with MacPGP, but it is easier to legally
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distribute, since it doesn’t do cryptography. Since it only does
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one thing it should also be easier to use. -->
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</p>
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<p>
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<!--
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SigWrite only handles a subset of secret keys that MacPGP does.
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For one thing, it does not handle encrypted keys, which is what
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MacPGP would normally generate.
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-->
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MacPGP has various code to try
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to protect secrets from other software running on the computer.
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SigWrite does not, instead you should try to secure the entire virtual
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machine that it is run in. Such as by putting the Mini vMac disk
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image on an encrypted volume of the host computer, for a start.
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</p>
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<p>
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If a file named “sec_key.txt” exists in the
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same folder as the application, then SigWrite will not ask
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for the secret key, but instead get it from that file.
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So you can save time for a frequently used key by setting up
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a copy of SigWrite this way. You can save even more time by
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“wrapping” this copy of SigWrite with
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<a href="../autoquit/index.html">AutoQuit</a>.
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</p>
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<p>
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<a href="../sigwrttl/index.html">SigWrtTl</a>
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is a command line version of SigWrite.
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</p>
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<p>
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SigWrite is a successor to
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<a href="../psgwrite/index.html">PSgWrite</a>,
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which uses a different format that is more or less compatible
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with MacPGP.
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</p>
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<p>
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Here is the md5 checksum for the download, signed with
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<a href="https://www.gryphel.com/c/keys/k5.html">Gryphel Key 5</a>:
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</p>
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<blockquote>
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<pre>
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--------- GRY SIGNED TEXT ---------
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88431b1a988637870f706027db02cbf4 sigwrite-1.2.0.zip
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------- BEGIN GRY SIGNATURE -------
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Gry/4Xa8CFcUzxdN/Oj+k7MxmYKs7dr4k5oFxKGZTyzmGkgonzXfMUQv+CJbAI9i
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0bTxRjTKDrYI2M6jpTkkUFlBr2yIK1sf0ot5w6swikh1SB9mHrn4xB6ziYFjfdNz
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YZlrucKZnfznk87kVEuWiMQz7v+xltMEIHKa5cy+9UH0VOcimAfT46lFmZFQMDoX
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-------- END GRY SIGNATURE --------
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</pre>
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</blockquote>
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<p> See the
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<a href="../../appc/index.html">Compiling</a>
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page for instructions on compiling SigWrite from the source code. </p>
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<p> : </p>
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<p> If you find SigWrite useful, please consider
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<a href="https://www.gryphel.com/c/help/index.html">helping the Gryphel Project</a>,
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of which it is a part. </p>
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<a href="https://www.gryphel.com/index.html">
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<img src="https://www.gryphel.com/d/gryphel-32.gif" width=32 height=32 border=0
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alt="gryphel logo, 1K"
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>
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</a>
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<hr>
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<div>
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<i> <a href="https://www.gryphel.com/index.html">www.gryphel.com</a>/c/<a href="../../index.html">minivmac</a>/<a href="../index.html">extras</a>/sigwrite
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- <a href="https://www.gryphel.com/c/feedback.html">feedback</a> </i>
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<br>
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copyright (c) 2018 Paul C. Pratt - last update 10/19/2018
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</div>
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</body>
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</html>
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