smalloc() macros and thence to the safemalloc() functions in misc.c.
This should allow me to plug in a debugging allocator and track
memory leaks and segfaults and things.
[originally from svn r818]
the primegen() function doesn't work well with <100 bits, so RSA
keys need to be >=200 to be generated correctly, and I thought 256
was a nice round number beyond that just to be sure. Perhaps I
should also have a security warning on any key less than 768; or
perhaps I should let people shoot themselves in the feet if they
really want to.
[originally from svn r767]
features (prompt for passphrase twice, prompt before overwriting a
file, check the key file was actually saved OK), testing of the
generated keys to make sure I got the file format right, and support
for a variable key size. I think what's already here is basically
sound though.
[originally from svn r715]
