Security tools

The program lib/crypt_prog can be used for several purposes:

crypt_prog -genkey n private_keyfile public_keyfile

Create a key pair with n bits (always use 1024). Write the keys in encoded ASCII form to the indicated files.

crypt_prog -sign file private_keyfile

Create a digital signature for the given file. Write it in encoded ASCII to stdout.

crypt_prog -verify file signature_file public_keyfile

Verify a signature for the given file.

crypt_prog -test_crypt private_keyfile public_keyfile

Perform an internal test, checking that encryption followed by decryption works.