PYTHON-BCRYPT(1)
NAME
python-bcrypt - a module to implement OpenBSD's Blowfish password hash
algorithm
This manual page was written for the Debian distribution because the
original program does not have a manual page.
python-bcrypt is a Python module implementating the OpenBSD Blowfish
password hashing algorithm, as described in "A Future-Adaptable Password Scheme" by Niels Provos and David Mazieres:
http://www.openbsd.org/papers/bcrypt-paper.ps
This system hashes passwords using a version of Bruce Schneier's Blowfish block cipher with modifications designed to raise the cost of offline password cracking. The computation cost of the algorithm is parametised, so it can be increased as computers get faster.
- A simple example demonstrates most of the features:
- import bcrypt
- # Hash a password for the first time
hashed = bcrypt.hashpw(password, bcrypt.gensalt()) - # gensalt's log_rounds parameter determines the complexity
# the work factor is 2**log_rounds, and the default is 12
hashed = bcrypt.hashpw(password, bcrypt.gensalt(10)) - # Check that an unencrypted password matches one that has
# previously been hashed
if bcrypt.hashpw(plaintext, hashed) == hashed:print "It matches" - else:
print "It does not match"
AUTHOR
python-bcrypt was written by Damien Miller <djm@mindrot.org>
This manual page was written by Kevin Coyner <kcoyner@debian.org> for
the Debian system (but may be used by others). Permission is granted
to copy, distribute and/or modify this document under the terms of the
GNU General Public License, Version 2 any later version published by
the Free Software Foundation.
- On Debian systems, the complete text of the GNU General Public License
can be found in /usr/share/common-licenses/GPL.