def decrypt_file( filename, keyfile, decrypted_filename = None ):
if not decrypted_filename:
decrypted_filename = filename.rstrip('.rsa')
ciphertext = load(filename)
if '\x00' == ciphertext[0]:
ciphertext = ciphertext[1:]
elif 'A' == ciphertext[0]:
ciphertext = base64.decodestring(ciphertext[1:])
iv = load(ivfile)
key = load(keyfile)
plaintext = publickey.decrypt(key, ciphertext)
print '[+] decrypted %s to %s...' % (filename, decrypted_filename)
dump(decrypted_filename, plaintext)
print '[+] file written...'
def test_crypto():
message = 'This is a test message. 0123456789ABCDEF'
print '\t[+] generating a 2048-bit RSA key... ',
flush()
key = publickey.generate_key( 2048 )
assert( key.size() == 2047 )
print 'OK!'
print '\t[+] can we encrypt with this key? ',
flush()
assert( key.can_encrypt() )
print 'yes'
print '\t[+] encrypting \'%s\'...' % message
print '\t[+] using %d-bit RSA key' % (key.size() + 1)
ct = publickey.encrypt( key, message )
pt = publickey.decrypt( key, ct )
print '\t[+] decryped ciphertext as \'%s\'' % pt
assert( pt == message )
