Password Generator and Validation

Password Generator and Validation

Today, we will be writing code for password generator or creator, and also a validation of the given password.

We will be creating three different programs today.

1st : Password Generator

Code:

#using random function to take characters from given set, though it can generate week passwords also.

import random

s = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%^&*()?"

#make sure output password is 8 character long

passlen = 8

p =  "".join(random.sample(s,passlen ))

print p

2nd : Password Generator

Using inbuilt libraries

Code:

import string
import random

#creating a function to create a password using string and random function.

def pw_gen(size, chars=string.ascii_letters + string.digits + string.punctuation):
    return ''.join(random.choice(chars) for _ in range(size))

print(pw_gen(int(input('How many characters in your password?:\t'))))

3rd : Password validation

This forces, to put below specification in given password

• At least 8 character long.
• Have at least 1 digit, 1 lower, 1 capital letter.
• Have at least 1 special character in it

Code:

import re

def validate():

    while True:

        password = raw_input("Enter a password: ")

        if len(password) < 8:

            print("Make sure your password is at lest 8 letters")

        elif re.search('[0-9]',password) is None:

            print("Make sure your password has a number in it")

        elif re.search('[A-Z]',password) is None: 

            print("Make sure your password has a capital letter in it")

        elif re.search('[@#$%^&+=]',password) is None: 

            print("Make sure your password has a Special character in it")

        else:

            print("Strong password")

            break

validate()