Crate rpg_util 

RPG - Rust Password Generator

A fast, secure, and customizable password generator library.

Features

• Customizable character sets
• Character exclusion with range support
• Minimum character type requirements
• Pattern-based generation
• Uniform character distribution

Example

use rpg_util::{GenerationParams, PasswordArgs, build_char_set, generate_passwords};
use rand::Rng;

let args = PasswordArgs {
    capitals_off: false,
    numerals_off: false,
    symbols_off: false,
    exclude_chars: vec![],
    include_chars: None,
    min_capitals: None,
    min_numerals: None,
    min_symbols: None,
    pattern: None,
    length: 16,
    password_count: 1,
};

let char_set = build_char_set(&args).unwrap();
let mut rng = rand::rng();
let gen_params = rpg_util::GenerationParams {
    length: 16,
    count: 1,
    min_capitals: None,
    min_numerals: None,
    min_symbols: None,
    pattern: None,
};
let passwords = rpg_util::generate_passwords(&char_set, &gen_params, &mut rng);

Structs

GenerationParams

Parameters for password generation

PasswordArgs

Arguments structure for password generation

Enums

PasswordError

Custom error type for password generation

PatternChar

Pattern character types

Functions

build_char_set

Builds the character set based on command-line arguments Returns a vector of valid characters that can be used for password generation

calculate_entropy

Calculates password entropy in bits

column_count

Calculates the number of columns for table output

generate_passwords

Generates passwords using the provided character set and RNG

parse_exclude_chars

Parses character exclusion strings, expanding ranges like “a-z” or “0-9” Returns a vector of individual characters to exclude

parse_pattern

Parses a pattern string like “LLLNNNSSS” into PatternChar vector

print_columns

Prints passwords in column format

validate_args

Validates command-line arguments