Hi all,
im a newbie, developing a django online address book application.
using mod_python, apache2, postgresql for database.
i have two tables in my database viz login_table and contact_table..
login_table stores username and password.. contact table stores first
name, last name, phone number, email id.. i have created a login page
that accepts username and password.. i need my application to store
the password in encrypted form in the database.
how to do password encryption? i have tried some codings ,but that
doesnt work out. this is my models.py code.
===models.py====
from django.conf import settings
import binascii
from os import urandom
from base64 import b64encode, b64decode
from django.db import models
from Crypto.Cipher import ARC4
def get_value(usr_name):
def f(self):
return login_table.decrypt(getattr(self, 'e_%s'%usr_name))
return f
def set_value(usr_name):
def f(self, value):
setattr(self, 'e_%s'%usr_name, login_table.encrypt(value))
return f
class login_table(models.Model):
SALT_SIZE = 8
usr_name = models.CharField(max_length=100,unique=True,blank=True)
pswd = models.CharField(max_length=50,blank=True)
def encrypt(plaintext):
salt = urandom(login_table.SALT_SIZE)
arc4 = ARC4.new(salt + settings.SECRET_KEY)
plaintext = "%3d%s%s" %
(len(plaintext),plaintext,urandom(256-len
(plaintext)))
return "%s$%s" % (b64encode(salt), b64encode(arc4.encrypt
(plaintext)))
def decrypt(ciphertext):
salt, ciphertext = map(b64decode, ciphertext.split('$'))
arc4 = ARC4.new(salt + settings.SECRET_KEY)
plaintext = arc4.decrypt(ciphertext)
return plaintext[3:3+int(plaintext[:3].strip())]
def encrypted_property(username):
return property(get_value(username), set_value(username))
usr_name = encrypted_property('usr_name')
pswd = encrypted_property('pswd')
def __unicode__(self):
return self.usr_name
class contact_table(models.Model):
fname = models.CharField(max_length=50,unique=True)
lname = models.CharField(max_length=50)
ph_num = models.CharField(max_length=50)
email = models.EmailField(max_length=75)
usr_name = models.ForeignKey(login_table)
def __unicode__(self):
return '%s%s%s%s' %
(self.fname,self.lname,self.ph_num,self.email)
How to fix this problem? and is there any pre-defined functions to do
password encryption?
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