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/relevation/branches/1.1-PyCryptoPlus/python-cryptoplus/src/CryptoPlus/Hash/python_PBKDF2.py
0,0 → 1,55
import pypbkdf2
from CryptoPlus.Hash import SHA as SHA1, HMAC
__all__ = ['new']
def new(passphrase, salt, iterations=1000, digestmodule=SHA1, macmodule=HMAC):
"""PKCS#5 v2.0 Password-Based Key Derivation
passphrase = the passphrase, supplied as a raw string, to make a key from
salt = salt as raw string
iterations = amount of iterations (default = 1000)
digestmodule = digest function to use, supply as module
example: python_SHA from CryptoPlus.Hash
default: SHA1
macmodule = mac function to use, supply as module
example: HMAC from CryptoPlus.Hash
default: HMAC
=> macmodule & digestmodule construct the pseudorandom function
=> by default: HMAC-SHA1
Examples: (from: http://www.ietf.org/rfc/rfc3962.txt)
==========
>>> from CryptoPlus.Hash import python_PBKDF2
>>> passphrase = "password"
>>> salt = "ATHENA.MIT.EDUraeburn"
>>> iterations = 1
>>> hasher = python_PBKDF2.new(passphrase,salt,iterations)
>>> hasher.hexread(16)
'cdedb5281bb2f801565a1122b2563515'
>>> passphrase = "password"
>>> salt = "ATHENA.MIT.EDUraeburn"
>>> iterations = 1200
>>> hasher = python_PBKDF2.new(passphrase,salt,iterations)
>>> hasher.hexread(32)
'5c08eb61fdf71e4e4ec3cf6ba1f5512ba7e52ddbc5e5142f708a31e2e62b1e13'
>>> passphrase = "X"*64
>>> salt = "pass phrase equals block size"
>>> iterations = 1200
>>> hasher = python_PBKDF2.new(passphrase,salt,iterations)
>>> hasher.hexread(32)
'139c30c0966bc32ba55fdbf212530ac9c5ec59f1a452f5cc9ad940fea0598ed1'
>>> passphrase = "X"*65
>>> salt = "pass phrase exceeds block size"
>>> iterations = 1200
>>> hasher = python_PBKDF2.new(passphrase,salt,iterations)
>>> hasher.hexread(32)
'9ccad6d468770cd51b10e6a68721be611a8b4d282601db3b36be9246915ec82a'
"""
return pypbkdf2.PBKDF2(passphrase, salt, iterations, digestmodule, macmodule)