https://github.com/sundarnagarajan/py-bcrypt

Automatically exported from code.google.com/p/py-bcrypt
https://github.com/sundarnagarajan/py-bcrypt

bcrypt kdf python wrapper

Last synced: 4 months ago
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Automatically exported from code.google.com/p/py-bcrypt

• Host: GitHub
• URL: https://github.com/sundarnagarajan/py-bcrypt
• Owner: sundarnagarajan
• License: other
• Created: 2016-03-20T02:34:38.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2016-03-20T02:37:10.000Z (about 10 years ago)
• Last Synced: 2025-09-13T21:40:49.581Z (9 months ago)
• Topics: bcrypt, kdf, python, wrapper
• Language: C
• Size: 49.8 KB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 9
• Metadata Files:
  • Readme: README
  • License: LICENSE

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README

          
py-bcrypt is an implementation 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

off-line password cracking. The computation cost of the algorithm is

parametised, so it can be increased as computers get faster.

py-bcrypt requires Python 2.4. Older versions may work, but the

bcrypt.gensalt() method won't - it requires the cryptographic random

number generator os.urandom() introduced in 2.4.

To install, use the standard Python distutils incantation:

	python setup.py build

	python setup.py install

Regression tests are in the test/test.py file. This is deliberately in

a subdirectory so it does not mistakenly pick up the top-level bcrypt/

directory. ***PLEASE*** run the regress tests and ensure they pass before

installing this module.

py-bcrypt is licensed under a ISC/BSD licence. The underlying Blowfish

and password hashing code is taken from OpenBSD's libc. See the LICENSE

file for details.

Please report bugs to Damien Miller . Please check the

TODO file first, in case your problem is something I already know about

(please send patches!)

A simple example that 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.checkpw(plaintext, hashed):

		print "It matches"

	else:

		print "It does not match"

	# Generate a 256-bit cryptographic key

	key = bcrypt.kdf(password, salt, 100, 256/8)

$Id$