added a script that checks password strength from 1 to 5 i.e weak to strong

Author: jaspinderkohli

PASSWORD RELATED/password-strength/README.md

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+# Password Strength Checker
+
+This is a simple Python script that checks the strength of a given password based on various criteria. It evaluates the password for length, lowercase letters, uppercase letters, digits, and special characters, and provides feedback on its strength.
+
+## How to Use
+
+1. Clone the repository or download the script file `password_strength_checker.py`.
+
+2. Run the script using Python (Python 3.x is recommended).
+
+3. Enter the password you want to check when prompted.
+
+4. The script will evaluate the password and display its strength along with any areas of improvement.
+
+## Criteria for Password Strength
+
+The password is evaluated against the following criteria:
+
+- Minimum password length: The password should have at least 8 characters.
+
+- At least one lowercase letter: The password should contain at least one lowercase letter (a-z).
+
+- At least one uppercase letter: The password should contain at least one uppercase letter (A-Z).
+
+- At least one digit: The password should contain at least one digit (0-9).
+
+- At least one special character: The password should contain at least one special character (!@#$%^&*()_+=-[]{};:'",.<>?/\\|).
+
+## Password Strength Scores
+
+The password is given a strength score based on the number of criteria met:
+
+- 1: Weak - The password does not meet the minimum length requirement.
+
+- 2: Moderate - The password meets the minimum length requirement but lacks some character types.
+
+- 3: Fair - The password meets the minimum length requirement and includes lowercase letters, uppercase letters, and digits.
+
+- 4: Strong - The password meets the minimum length requirement and includes lowercase letters, uppercase letters, digits, and at least one special character.
+
+- 5: Very Strong - The password meets all criteria and is considered very strong.
+
+## Example
+
+```bash
+$ python password_strength_checker.py
+Enter your password: My$3cureP@ssw0rd
+
+Password Strength: 5
+Password is very strong!
+```
+
+## Customization
+
+You can customize the min_length variable in the script to set your desired minimum password length.
+
+Feel free to modify and enhance the script according to your needs and security requirements.

PASSWORD RELATED/password-strength/password_strength_checker.py

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+import re
+
+
+def password_strength(password):
+    """
+        Checks the strength of a password and returns a tuple containing the strength
+    """
+    # Minimum password length
+    min_length = 8
+
+    # Regular expressions to check for different character types
+    has_lowercase = re.compile(r'[a-z]')
+    has_uppercase = re.compile(r'[A-Z]')
+    has_digit = re.compile(r'\d')
+    has_special = re.compile(r'[!@#$%^&*()_+=\-[\]{};:\'",.<>?/\\|]')
+
+    strength = 0
+    messages = []
+
+    if len(password) >= min_length:
+        strength += 1
+    else:
+        messages.append("Password should have at least {} characters.".format(min_length))
+
+    if has_lowercase.search(password):
+        strength += 1
+    else:
+        messages.append("Password should have at least one lowercase letter.")
+
+    if has_uppercase.search(password):
+        strength += 1
+    else:
+        messages.append("Password should have at least one uppercase letter.")
+
+    if has_digit.search(password):
+        strength += 1
+    else:
+        messages.append("Password should have at least one digit.")
+
+    if has_special.search(password):
+        strength += 1
+    else:
+        messages.append("Password should have at least one special character.")
+
+    return strength, messages
+
+
+if __name__ == "__main__":
+    password = input("Enter your password: ")
+    strength, messages = password_strength(password)
+
+    print("\nPassword Strength: {}".format(strength))
+    if strength == 5:
+        print("Password is very strong!")
+    else:
+        print("Password needs improvement:")
+        for message in messages:
+            print("- {}".format(message))