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This is an example of how to use Botan in a GUI. You need at least
Botan 1.6.0.
You'll also need GTK+ 2.x (tested with GTK+ 2.10; should work with
most versions). Keep in mind that I was learning GTK as I was writing
this code, so it is not exactly the best GTK code you're likely to
see.
dsa.cpp is the main GTK+ driver. It has some comments at the top which
point out major areas of interest.
gtk_ui.* implement a User_Interface object that opens up a GTK+ dialog
box that asks the user for their passphrase. It works pretty well, the
only major deficiency is a fixed upper limit on the size of the
passphrase (currently 64). You may want to use this in your own code,
assuming you use GTK. If not, it should at least provide an outline
for writing a version for your favorite windowing system.
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