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python-bcrypt  0.2
Functions
bcrypt Namespace Reference

Functions

def gensalt

Detailed Description

OpenBSD Blowfish password hashing.

This module implements the OpenBSD Blowfish password hashing
algorithm, as described in "A Future-Adaptable Password Scheme" by
Niels Provos and David Mazieres.

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.

Passwords are hashed using the hashpw() routine:

  hashpw(password, salt) -> hashed_password

Salts for the the second parameter may be randomly generated using the
gensalt() function:

  gensalt(log_rounds = 12) -> random_salt

The parameter "log_rounds" defines the complexity of the hashing. The
cost increases as 2**log_rounds.

Function Documentation

def bcrypt.gensalt (   log_rounds = 12)
Generate a random text salt for use with hashpw(). "log_rounds"
defines the complexity of the hashing, increasing the cost as
2**log_rounds.

Definition at line 28 of file __init__.py.

00028 
00029 def gensalt(log_rounds = 12):
00030        """Generate a random text salt for use with hashpw(). "log_rounds"
00031        defines the complexity of the hashing, increasing the cost as
00032        2**log_rounds."""
00033        return encode_salt(os.urandom(16), min(max(log_rounds, 4), 31))
00034 

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