Initial Commit

New-SanCertificate.cmd

@@ -0,0 +1,4 @@
+@echo OFF
+cd "%~dp0"
+PowerShell.exe -ExecutionPolicy ByPass -File "%~dp0New-SanCertificate.ps1" 
+pause

New-SanCertificate.ps1

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+<#
+
+.SYNOPSIS
+Generates a self-signed certificate to be used by IIS for HTTPS communications
+
+.DESCRIPTION
+Generates a SAN self-signed certificate to be used by IIS for HTTPS communications.
+The certificate will be automatically trusted by the local machine and assigned to the HTTPS binding of IIS for the default site.
+
+The certificate by default will include the following items in the SAN for the cert:
+Hostname
+Short hostname limited to 15 characters
+localhost
+All IPv4 addresses
+
+.PARAMETER IpAddress
+IP Addresses to include in the Certificate. If not provided, the script will gather IPv4 addresses
+
+.PARAMETER AdditionalDnsNames
+Specifies additional DNS names that should be added to the certificate
+
+.PARAMETER Validity
+Defines the validity of the certificate in years. Defaults to 15 years
+
+.NOTES
+  Version:        1.0
+  Author:         Tyler Hale
+  Creation Date:  2022.07.15
+
+#>
+
+[CmdletBinding()]
+param (
+    [Parameter(Mandatory = $false)]
+    [ValidateScript({foreach ($IP in $_) {[ipaddress]$IP}})]
+    [string[]]
+    $IpAddress = ((Get-NetIPAddress -AddressFamily IPv4 -Type Unicast -AddressState Preferred).IPAddress),
+    [Parameter(Mandatory=$false)]
+    [ValidateNotNullOrEmpty()]
+    [string[]]
+    $AdditionalDnsNames,
+    [Parameter(Mandatory=$false)]
+    [ValidateNotNullOrEmpty()]
+    [int]
+    $Validity = 15
+)
+
+############################################### [Script Settings] ################################################
+
+$Hostname = $Env:COMPUTERNAME
+
+$CertParameters = @{
+    "Subject" = $Hostname
+    "NotAfter" = (Get-Date).AddYears($Validity) 
+    "KeyExportPolicy" = "NonExportable"
+    "KeySpec" = "KeyExchange"
+    "KeyUsage" = "DigitalSignature","KeyEncipherment"
+    "CertStoreLocation" = "cert:\LocalMachine\My"
+}
+
+############################################# [Internal Processing] ##############################################
+
+# Stop if not running as an admin
+If (!([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
+    Write-Error "Not running as an admin. Please relaunch running as an admin."
+    pause
+    exit
+}
+
+# Account for incompatibility for hostnames longer than 15 characters
+if ($Hostname.Length -gt 15) {
+    Write-Verbose "Applying fixes for hostname length"
+    $ShortHostname = $Hostname.Substring(0,15)
+    $HostString = "127.0.0.1 $ShortHostname"
+}
+
+# Setup SAN text extension for the cert request
+$TextExtension = "2.5.29.17={text}DNS=$Hostname&DNS=localhost"
+
+# Add Compatibility hostname if defined to SAN
+if ($null -ne $ShortHostname) {$TextExtension += "&DNS=$ShortHostname"}
+
+# Add custom DNS names to SAN
+if ($null -ne $DnsName) {foreach ($Name in $DnsName) {$TextExtension += "&DNS=$Name"}}
+
+# Add IP Addresses to SAN
+foreach ($Ip in $IpAddress) {$TextExtension += "&IPAddress=$Ip"}
+if ($IpAddress -notcontains "127.0.0.1") {$TextExtension += "&IPAddress=127.0.0.1"}
+
+# Add final text extension to cert request
+$CertParameters['TextExtension'] = @($TextExtension)
+
+################################################## [Execution] ###################################################
+
+# Add hosts entry for short hostname if needed
+if ($null,'' -ne $ShortHostname) {
+    if ((Get-Content "C:\Windows\System32\drivers\etc\hosts") -notcontains $HostString) {
+        Write-Verbose "Adding hosts entry"
+        Add-Content -Path "C:\Windows\System32\drivers\etc\hosts" -Value $HostString
+    }
+}
+
+# Generate certificate
+$GeneratedCert = New-SelfSignedCertificate @CertParameters
+
+# Export certificate
+$ExportedCert = $GeneratedCert | Export-Certificate -FilePath "$(Get-Item .\ | Select-Object -ExpandProperty FullName)\$Hostname`_$(Get-Date -Format yyyy-MM-dd_HH.mm.ss).cer"
+Write-Host "Certificate exported to $($ExportedCert.FullName)`nYou will need to import the cert to the Local Machine - Trusted Root Certificate Authority on external clients that need to connect to this machine`n"
+
+# Add certificate to trusted root CA
+Import-Certificate -CertStoreLocation cert:\LocalMachine\Root -FilePath $ExportedCert.FullName | Out-Null
+
+if (Get-Command -Name "Get-WebBinding" -ErrorAction SilentlyContinue) {
+    # Setup https binding if it is not configured
+    if ($null -eq (Get-WebBinding -Name "Default Web Site" -Protocol "https")) {
+        Write-Verbose "Creating IIS Binding on Default Web Site"
+        New-WebBinding -Name "Default Web Site" -IPAddress "*" -Port 443 -Protocol "https"
+    }
+
+    # Assign to IIS Binding
+    (Get-WebBinding -Name "Default Web Site" -Port 443 -Protocol "https").AddSslCertificate($GeneratedCert.Thumbprint, "my")
+}
+else {
+    Write-Warning "IIS not installed so the binding was not configured`n"
+}

README.md

@@ -2,19 +2,25 @@
 
 Generates a self-signed certificate to be used by IIS for HTTPS communications
 
-
 ## Requirements
 
+- Must be running as an admin
+- IIS must be installed for it to set the binding on the Default site
+
 ## Variables
 
 |      Variable      | Required |           Default            | Choices |                              Description                               |
-| -------- | -------- | ------- | ------- | ----------- |
-|          |          |         |         |             |
+| ------------------ | -------- | ---------------------------- | ------- | ---------------------------------------------------------------------- |
+| IpAddress          | No       | IPv4 addresses of the system |         | IP Addresses to include in the Certificate                             |
+| AdditionalDnsNames | No       |                              |         | Specifies additional DNS names that should be added to the certificate |
+| Validity           | No       | 15                           |         | Defines the validity of the certificate in years                       |
 
 ## Example
 
+```powershell
+.\New-SanCertificate.ps1
+```
+
 ## License
 
 See LICENSE file for full license information.
-
-## Screenshots