Manage hash-salted passwords

password.py

from hashlib import sha1
from random import random, choice

class Password(object):
	"""Manage hash-salted passwords."""

	HASH = sha1
	SALT_LEN = 24
	HASHED_LEN = len(HASH().hexdigest()) + SALT_LEN

	def __init__(self):
		self.password = None

	def _hash_password(self, password, salt):
		"""Returns a hashed password."""
		hashed = password
		for i in range(1000):
			hashed = self.HASH("%s%s" % (hashed, salt)).hexdigest()
		return "%s%s" % (salt, hashed)

	def set_password(self, password):
		"""Stores the password in hashed form."""
		salt = ''.join([choice(self.HASH("%s" % random()).hexdigest()) for i in range(self.SALT_LEN)])
		self.password = self._hash_password(password, salt)

	def check_password(self, password):
		"""Compares the given password with the stored hashed form."""
		hashed = self._hash_password(password, self.password[:self.SALT_LEN])
		return self.password == hashed