Password Generator Tool

<#
.SYNOPSIS
Password Generator Tool

.DESCRIPTION
This script generates secure passwords based on user-defined criteria including
length, and the inclusion of uppercase letters, lowercase letters, numbers, and special characters.

.NOTES
File Name      : PasswordGenerator.ps1
Author         : [Your Name]
Prerequisite   : PowerShell V3 or later
Version        : 1.0
Date           : [Current Date]

.EXAMPLE
.\PasswordGenerator.ps1
#>

function Show-Menu {
    Clear-Host
    Write-Host "=== Password Generator Tool ===" -ForegroundColor Cyan
    Write-Host "1. Generate Password"
    Write-Host "2. Set Password Options"
    Write-Host "3. View Current Settings"
    Write-Host "4. Exit"
}

function Set-PasswordOptions {
    $script:passwordLength = Read-Host "Enter password length (default is 12)"
    if ([string]::IsNullOrWhiteSpace($script:passwordLength)) { $script:passwordLength = 12 }
    
    $script:includeUppercase = Read-Host "Include uppercase letters? (Y/N, default is Y)"
    $script:includeUppercase = ($script:includeUppercase -ne 'N')
    
    $script:includeLowercase = Read-Host "Include lowercase letters? (Y/N, default is Y)"
    $script:includeLowercase = ($script:includeLowercase -ne 'N')
    
    $script:includeNumbers = Read-Host "Include numbers? (Y/N, default is Y)"
    $script:includeNumbers = ($script:includeNumbers -ne 'N')
    
    $script:includeSpecialChars = Read-Host "Include special characters? (Y/N, default is Y)"
    $script:includeSpecialChars = ($script:includeSpecialChars -ne 'N')
    
    Write-Host "Password options updated." -ForegroundColor Green
}

function View-CurrentSettings {
    Write-Host "`nCurrent Password Generation Settings:" -ForegroundColor Yellow
    Write-Host "Password Length: $script:passwordLength"
    Write-Host "Include Uppercase: $($script:includeUppercase ? 'Yes' : 'No')"
    Write-Host "Include Lowercase: $($script:includeLowercase ? 'Yes' : 'No')"
    Write-Host "Include Numbers: $($script:includeNumbers ? 'Yes' : 'No')"
    Write-Host "Include Special Characters: $($script:includeSpecialChars ? 'Yes' : 'No')"
    Write-Host ""
}

function Generate-Password {
    $characterSet = @()
    if ($script:includeUppercase) { $characterSet += 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.ToCharArray() }
    if ($script:includeLowercase) { $characterSet += 'abcdefghijklmnopqrstuvwxyz'.ToCharArray() }
    if ($script:includeNumbers) { $characterSet += '0123456789'.ToCharArray() }
    if ($script:includeSpecialChars) { $characterSet += '!@#$%^&*()_+-=[]{}|;:,.<>?'.ToCharArray() }

    if ($characterSet.Count -eq 0) {
        Write-Host "Error: No character set selected. Please update your settings." -ForegroundColor Red
        return
    }

    $password = -join (1..$script:passwordLength | ForEach-Object { Get-Random -InputObject $characterSet })
    
    Write-Host "`nGenerated Password:" -ForegroundColor Green
    Write-Host $password
    Write-Host ""

    $saveToFile = Read-Host "Do you want to save this password to a file? (Y/N)"
    if ($saveToFile -eq 'Y') {
        $fileName = "GeneratedPassword_$(Get-Date -Format 'yyyyMMdd_HHmmss').txt"
        $filePath = Join-Path -Path $env:USERPROFILE -ChildPath "Desktop\$fileName"
        $password | Out-File -FilePath $filePath
        Write-Host "Password saved to: $filePath" -ForegroundColor Green
    }
}

# Initialize default settings
$script:passwordLength = 12
$script:includeUppercase = $true
$script:includeLowercase = $true
$script:includeNumbers = $true
$script:includeSpecialChars = $true

# Main program loop
do {
    Show-Menu
    $choice = Read-Host "`nEnter your choice (1-4)"

    switch ($choice) {
        "1" { Generate-Password }
        "2" { Set-PasswordOptions }
        "3" { View-CurrentSettings }
        "4" { Write-Host "Exiting program..." -ForegroundColor Yellow; break }
        default { Write-Host "Invalid choice. Please try again." -ForegroundColor Red }
    }

    if ($choice -ne "4") {
        Read-Host "`nPress Enter to continue..."
    }
} while ($choice -ne "4")

This Password Generator Tool includes:

1. A menu-driven interface for easy navigation.
2. Functions to:
   • Generate passwords based on user-defined criteria
   • Set password generation options
   • View current password generation settings
3. Customizable options for password generation:
   • Password length
   • Inclusion of uppercase letters
   • Inclusion of lowercase letters
   • Inclusion of numbers
   • Inclusion of special characters
4. Option to save generated passwords to a file on the desktop.
5. Default settings for quick password generation.

Key features:

• Flexible password generation based on user preferences
• Ability to customize password complexity
• Option to save generated passwords securely
• User-friendly interface for easy operation
• Viewing current settings for transparency

This tool is particularly useful for:

• System administrators needing to generate secure passwords
• Users who want to create strong, customized passwords
• IT professionals managing password policies
• Anyone needing quick access to randomly generated passwords

To use this script effectively:

1. Run the script in PowerShell
2. Use the menu to navigate between generating passwords, setting options, and viewing current settings
3. Customize the password generation criteria as needed
4. Generate passwords and optionally save them to files

This script provides a simple yet effective way to generate secure passwords with customizable criteria, helping to enhance security practices in various IT and personal scenarios.