Password hasher with options in English language

Password hasher with options in English language

password_hasher_US.py

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+import bcrypt
+import os
+import json
+
+def generate_salt(cost_factor: int = 12) -> str:
+    """
+    Generates a random salt with a specified cost factor.
+
+    :param cost_factor: The cost factor for bcrypt (default is 12).
+    :return: A random salt as a hexadecimal string.
+    """
+    return bcrypt.gensalt(cost_factor).decode('utf-8')
+
+def hash_password(password: str, salt: str) -> str:
+    """
+    Converts a password into a bcrypt hash with a salt.
+
+    :param password: The password to hash.
+    :param salt: The salt to use for hashing.
+    :return: The bcrypt hash of the password with the salt.
+    """
+    return bcrypt.hashpw(password.encode(), salt.encode()).decode('utf-8')
+
+def verify_password(hashed_password: str, password: str) -> bool:
+    """
+    Verifies if the password matches the hash with the salt.
+
+    :param hashed_password: The bcrypt hash of the password with the salt.
+    :param password: The password to verify.
+    :return: True if the password matches the hash, False otherwise.
+    """
+    return bcrypt.checkpw(password.encode(), hashed_password.encode())
+
+def save_to_file(salt: str, hashed_password: str, filename: str):
+    """
+    Saves the salt and hash to a file.
+
+    :param salt: The salt used for hashing.
+    :param hashed_password: The hash of the password.
+    :param filename: The name of the file to save the data.
+    """
+    data = {
+        'salt': salt,
+        'hashed_password': hashed_password
+    }
+    with open(filename, 'w') as file:
+        json.dump(data, file)
+
+def load_from_file(filename: str):
+    """
+    Loads the salt and hash from a file.
+
+    :param filename: The name of the file to load the data.
+    :return: The salt and hash of the password.
+    """
+    with open(filename, 'r') as file:
+        data = json.load(file)
+    return data['salt'], data['hashed_password']
+
+def get_cost_factor():
+    """
+    Prompts the user to enter a valid cost factor.
+
+    :return: The cost factor entered by the user.
+    """
+    while True:
+        cost_factor_input = input("Enter the cost factor (default 12, typically between 4 and 31): ")
+        if cost_factor_input == '':
+            return 12  # Use the default value if the user enters nothing
+        try:
+            cost_factor = int(cost_factor_input)
+            if 4 <= cost_factor <= 31:
+                return cost_factor
+            else:
+                print("The cost factor must be between 4 and 31. Please try again.")
+        except ValueError:
+            print("Please enter a valid number.")
+
+def main():
+    while True:
+        print("\nOptions:")
+        print("1. Enter a password and generate a hash.")
+        print("2. Verify the match between a hash and a password.")
+        print("3. Save the salt and hash to a file.")
+        print("4. Load the salt and hash from a file.")
+        print("5. Enter multiple passwords and generate hashes.")
+        print("6. Quit.")
+
+        choice = input("Choose an option (1/2/3/4/5/6): ")
+
+        if choice == '1':
+            password = input("Enter the password: ")
+            cost_factor = get_cost_factor()
+            salt = generate_salt(cost_factor)
+            hashed_password = hash_password(password, salt)
+            print(f"Salt: {salt}")
+            print(f"Password hash: {hashed_password}")
+
+        elif choice == '2':
+            try:
+                hashed_password = input("Enter the password hash: ")
+                password_to_verify = input("Enter the password to verify: ")
+                match = verify_password(hashed_password, password_to_verify)
+                print(f"Does the password match the hash? {match}")
+            except Exception as e:
+                print(f"Error verifying the password: {e}")
+
+        elif choice == '3':
+            try:
+                salt = input("Enter the salt: ")
+                hashed_password = input("Enter the password hash: ")
+                filename = input("Enter the filename to save the data: ")
+                save_to_file(salt, hashed_password, filename)
+                print(f"Data saved to {filename}")
+            except Exception as e:
+                print(f"Error saving the data: {e}")
+
+        elif choice == '4':
+            try:
+                filename = input("Enter the filename to load the data: ")
+                salt, hashed_password = load_from_file(filename)
+                print(f"Salt: {salt}")
+                print(f"Password hash: {hashed_password}")
+            except Exception as e:
+                print(f"Error loading the data: {e}")
+
+        elif choice == '5':
+            cost_factor = get_cost_factor()
+            while True:
+                password = input("Enter the password (or type 'quit' to stop): ")
+                if password.lower() == 'quit':
+                    break
+                salt = generate_salt(cost_factor)
+                hashed_password = hash_password(password, salt)
+                print(f"Salt: {salt}")
+                print(f"Password hash: {hashed_password}")
+
+        elif choice == '6':
+            print("Goodbye!")
+            break
+
+        else:
+            print("Invalid option. Please choose a valid option.")
+
+if __name__ == "__main__":
+    main()
+