Password_Manager.py

from cryptography.fernet import Fernet # This is a module which allow you to encryt text
                                        # Fernet is a tool that allows you to encrypt and decrypt data safely.


# Generate key once and save it to a file
def write_key():
    key = Fernet.generate_key()   # key is a secret code used to lock and unlock (encrypt/decrypt) your passwords.
    with open("key.key", "wb") as key_file:
        key_file.write(key)


# Load the key from file
def load_key():
    return open("key.key", "rb").read()


# Uncomment the line below only once to create the key file
# write_key()

# Creating a Fernet object
key = load_key()
fer = Fernet(key)

# This connects your program to the secret key.
# Now fer can be used to:
# Encrypt: fer.encrypt()
# Decrypt: fer.decrypt()


#Adding (Encrypting) a password
def add_passwords(account, password):
    with open("passwords_encrypted.txt", "a") as f:
        encrypted = fer.encrypt(password.encode()).decode()
        f.write(f"{account}:{encrypted}\n")
        print("Password added successfully!")

'''
password.encode() → converts your password (a normal string) into bytes (since Fernet works with bytes).

fer.encrypt(...) → turns it into unreadable gibberish (encrypted form).

.decode() → converts those bytes back into a string so we can store them in a text file.'''
   
    
# Viewing (Decrypting) passwords
def view_passwords():
    with open("passwords_encrypted.txt", "r") as f:
        for line in f:
            account, encrypted = line.strip().split(":")
            decrypted = fer.decrypt(encrypted.encode()).decode()
            print(f"{account}:{decrypted}")

                #Converts encrypted text back into bytes.
                # Decrypts it using the secret key.
                # Converts it back into a readable password string.
                            
                                        
                # try:
                #     with open("passss.txt", "r") as f:
                #         for line in f:
                #             account, pwd= line.strip().split(":")
                #             print(f"Account : {account}, Password : {pwd}")
                # except FileNotFoundError:
                #     print("No Passwords found, Add one first.")



print("-----WLECOME TO YOUR PASSWORD MANAGER-----")

while True:
    
    print("1. Add new Password")
    print("2. View Passwords")
    print("3. Exit")

    choice = input("Enter your choice: ")

    if choice == "1":
        account = input("Enter account name: ")
        password = input("Enter Password: ")
        add_passwords(account,password)

    elif choice == "2":
        view_passwords()

    elif choice == "3":
        print("Exiting Password Manager...")
        break

    else:
        print("Invalid choice Try again.")