What's the coolest program you've ever done in Python?

The coolest Python program I’ve ever made is the Python Password Hasher. Let’s first understand what Python password hashing is.

What is password hashing?

Python password hashing is an advanced form of encryption that can be used to securely store passwords online. In today's interconnected world, user passwords are one of the most vulnerable pieces of sensitive information on the Internet. Convert a password string into a string of random characters using different hashing algorithms, which are used in my program. The user is instructed to enter a password string and then select the appropriate hashing algorithm to use. The output hash is then displayed, which can be stored online.

Steps to use

• Create functions for different hashing methods

• Accept the password string entered by the user

• Accept user input to select hashing method

• Convert the string and provide output

Step 1: Create functions for different hashing methods

First, we create different functions that take the password string as a parameter and convert it into ciphertext form. The ciphertext is actually the hashed form of the data. Different functions contain different hashing algorithms.

grammar

def hash_with_MD5(message):
   print ("MD5:", hashlib.md5(message).hexdigest()) 

This function takes a message as a parameter and converts it to ciphertext using the MD5 hashing algorithm. Then print the hash digest for the user. If instead of using MD5, you use another hash algorithm, the syntax is the same, only the call to the hash function changes.

algorithm

Step 1 - Define different functions for different hashing algorithms

Step 2 - Use the string entered by the user as the parameter of the function

Step 3 - In the body of the function, print the hexadecimal digest of the hashed password

Example

def hash_with_MD5(message):
   encoded=message.encode()
   print ("Hashed with MD5:", hashlib.md5(encoded).hexdigest())
def hash_with_SHA(message):
   encoded=message.encode()
   print ("Hashed with SHA:", hashlib.sha256(encoded).hexdigest())
def hash_with_blake(message):
   encoded=message.encode()
   print ("Hashed with blake2b:",   hashlib.blake2b(encoded).hexdigest())
message='tutorialspoint'
hash_with_MD5(message)
hash_with_SHA(message)
hash_with_blake(message)

Output

Hashed with MD5: 6c60b3cfe5124f982eb629e00a98f01f
Hashed with SHA:
15e6e9ddbe43d9fe5745a1348bf1535b0456956d18473f5a3d14d6ab06737770
Hashed with blake2b:
109f6f017d7a77bcf57e4b48e9c744280ae7f836477c16464b27a3fe62e1353c70ec4c7f938080
60ee7c311094eede0235a43151c3d2b7401a3cb5a8f8ab3fbb 

Step 2: Get the password string entered by the user

The next step is to get input from the user for the password that needs to be stored. For security reasons, the password to be stored must be hashed, and the user-entered password must be encoded before hashing to ensure that it is suitable for passing to the hash function. This encoding operation is performed by the encode() function.

grammar

password=input("message").encode()

The password we receive from the user using the input() function cannot be used for hashing, so it is encoded using the encode() function. These two steps are combined here in one command for ease of coding and simplicity.

algorithm

Step 1 - Use the input() function to receive user input

Step 2- Convert input to encoding format

Example

password=input(“Enter the password for hashing: ”).encode()

Output

Enter the password for hashing: Python 

Step 3: Accept user input to select hashing method

We will provide users with a choice as to which hashing algorithm we will use to securely hash passwords. Different methods have different advantages and disadvantages, so we let users choose the method that works best for a specific password. Here we use a simple If-else structure to determine the selection entered by the user.

grammar

while True:
   choice = input("Enter choice(1/2/3): ")
      if choice in ('1', '2', '3'):
      try:
      ………………… 

Here we ask the user what type of hash they performed along with a list of options. The input is then checked against a list of valid inputs and, if true, the required action is performed. Otherwise, program control will break out of the loop.

algorithm

Step 1 − Request user input

Step 2- Check if user input is valid

Step 3 - Perform the selected action

Step 4 - Ask if you want to perform more actions

Example

import hashlib
def hash_with_MD5(password):
   
   #encoded=password.encode()
   print ("Hashed with MD5:", hashlib.md5(password).hexdigest())
def hash_with_SHA(password):
   
   #encoded=password.encode()
   print ("Hashed with SHA:", hashlib.sha256(password).hexdigest())
def hash_with_blake(password):
   
   #encoded=password.encode()
   print ("Hashed with blake2b:", hashlib.blake2b(password).hexdigest())
print("Select hashing operation.") 
print("1.MD5")
print("2.SHA")
print("3.blake")
while True:
   
   # take input from the user
   choice = input("Enter choice(1/2/3): ")
   
   # check if choice is one of the four options
   if choice in ('1', '2', '3'):
      try:
         password=input('Enter the password for hashing: ').encode()
      except ValueError:
         print("Invalid input. Please enter a string.")
         continue
      if choice == '1':
         hash_with_MD5(password)
      elif choice == '2':
         hash_with_SHA(password)
      elif choice == '3':
         hash_with_blake(password)
            
            # checking if user wants another calculation
      # break the while loop if answer is no
      next_calculation = input("Let's do next calculation? (yes/no): ")
      if next_calculation == "no":
         break
      else:
         print("Invalid Input")

Output

Select hashing operation.
1.MD5
2.SHA
3.blake
Enter choice(1/2/3): 2
Enter the password for hashing:Python
Hashed with SHA:
18885f27b5af9012df19e496460f9294d5ab76128824c6f993787004f6d9a7db
Let's do next calculation? (yes/no): yes
Enter choice(1/2/3): 1
Enter the password for hashing:Tutorialspoint 
Hashed with MD5: da653faa9f00528be9a57f3474f0e437
Let's do next calculation? (yes/no): no 

in conclusion

So here we build a program that hashes user passwords and returns them for secure storage. The program runs successfully and serves an important purpose. Further modifications can be made to implement newer functionality, which we will do later.

The above is the detailed content of What's the coolest program you've ever done in Python?. For more information, please follow other related articles on the PHP Chinese website!