gen_pass

#!/bin/bash

generate_password() {
    local password_length=$1
    local charset_upper="ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    local charset_lower="abcdefghijklmnopqrstuvwxyz"
    local charset_digits="0123456789"
    local charset_special="!@#$%^&*()_+-=<>?{}[]"

    # Ensure at least one character of each type in the password
    password=""
    password="${password}${charset_upper:$(($RANDOM % ${#charset_upper})):1}"
    password="${password}${charset_lower:$(($RANDOM % ${#charset_lower})):1}"
    password="${password}${charset_digits:$(($RANDOM % ${#charset_digits})):1}"
    password="${password}${charset_special:$(($RANDOM % ${#charset_special})):1}"

    # Fill the rest of the password with random characters from all sets
    remaining_length=$((password_length - 4))
    charset_all="$charset_upper$charset_lower$charset_digits$charset_special"
    for i in $(seq 1 "$remaining_length"); do
        # Get a random character from the combined charset
        random_char=$(echo "$charset_all" | fold -w1 | shuf | head -n1)
        password="${password}${random_char}"
    done

    # Shuffle the password to make it less predictable
    shuffled_password=$(echo "$password" | fold -w1 | shuf | tr -d '\n')
    echo "$shuffled_password"
}

# Check if the script is called with the correct number of arguments
if [ $# -ne 1 ]; then
    echo "Usage: $0 <password_length>"
    exit 1
fi

# Check if the argument is a positive integer
if ! [[ $1 =~ ^[1-9][0-9]*$ ]]; then
    echo "Error: The password length must be a positive integer."
    exit 1
fi

password_length=$1
strong_password=$(generate_password "$password_length")

echo "Generated strong password with length $password_length:"
echo "$strong_password"