🔐 Advanced Password Validator

---

A dynamic, rule-based password validation system for Python. Supports configurable validation rules and pre-set security modes to suit different application needs.

🚀 Features

• ✅ Rule-based architecture — plug & play validation rules
• 🔁 Preconfigured modes: lenient, moderate, strict
• 🔒 Supports: min/max length, symbols, blacklist, common password checks, etc.
• 📂 Compare passwords to a list of over 30000 already-registered passwords for added security
• 🧪 Designed for unit testing & integration

---

📦 Installation

pip install advanced_password_validator
poetry add advanced_password_validator

🌎 Code Usage:

An overview of a common coding example utilizing the advanced_password_validator to validate a password using customizable rules

from advanced_password_validator import PasswordValidator, Mode

# Instantiate a validator object:
validator = PasswordValidator(
    min_length = 8,                     # Integer / Defaults to None
    max_length = 65,                    # Integer / Defaults to None
    require_uppercase = True,           # Boolean / Defaults to False
    require_numbers = True,             # Boolean / Defaults to False
    require_symbols = True,             # Boolean / Defaults to False
    no_spaces = True,                   # Boolean / Defaults to False
    must_include_char = None,           # String / Defaults to None
    no_repeating_chars = 5,             # Integer / Defaults to None
    blacklisted_pattern = False,        # Boolean / Defaults to False
    not_common = False,                 # Boolean / Defaults to False
    mode = None                         # Mode (Enum) / Defaults to None
)

# validate against password strings:
password_valid1 = validator.validate("ThisIsSuperValid123+")[0]
password_valid2 = validator.validate("nouppercase123+")[0]
password_valid3 = validator.validate("NoNumbers++")[0]

print(password_valid1)  # <= Returns True
print(password_valid2)  # <= Returns False
print(password_valid3)  # <= Returns False

0️⃣ Return Type

The validate method returns a tuple: (bool, list)

• [0] = a boolean value determining if the password passed the validation
• [1] = a list of errors based on what Rules the password didn't pass (the list will be empty if validation passes)

📜 Rules Overview:

A rudimentary overview of the rules that can enabled for custom validation

Rules	Description
min_length	Specifies the minimum length required for the password (Integer)
max_length	Specifies the maximum length possible for the password (Integer)
require_uppercase	Specifies if the password must include at least 1 uppercase letter (Boolean)
require_numbers	Specifies if the password must include at least 1 digit (Boolean)
require_symbols	Specifies if the password must include at least 1 special character (Boolean)
no_spaces	Specifies if the password can include spaces (Boolean)
must_include_char	Specifies one of more required characters in the password (String)
no_repeating_chars	Specifies how many sequentially, repeating characters can be included in the password (Integer)
blacklisted_pattern	Specifies whether to check the password against a list of blacklisted patterns (Boolean)
not_common	Specifies whether to check the password against a list of commonly used passwords (Boolean)
mode	Specifies whether to use one of the 3 preconfigured modes (Mode)

🤖 Preconfigured Modes:

The advanced password validator package supports 3 preconfigured validator modes:

1. Lenient
2. Moderate
3. Strict Each of these individual modes come preconfigured with different values, and are meant to be utilised for quick out-of-the-box solutions.

from advanced_password_validator import PasswordValidator, Mode

validator = PasswordValidator(
    mode=Mode.lenient
)
# The mode param takes in a Mode-object (Enum) - Mode.lenient, Mode.moderate, Mode.strict

Lenient

• min_length = 8
• max_length = 65

Moderate

• min_length = 8
• max_length = 65
• require_uppercase = True
• require_numbers = True
• no_spaces = True
• no_repeating_chars = 4

Strict

• min_length = 12
• max_length = 65
• require_uppercase = True
• require_numbers = True
• require_symbols = True
• no_spaces = True
• no_repeating_chars = 3
• blacklisted_pattern = True
• not_common = True

📄 License Details:

This project is licensed under the MIT License – see the LICENSE section for further details.