Enabling Windows Remote Management (WinRM) with HTTPS

Windows Remote Management is a core technology for the remote management and configuration of Windows machines.  WinRM is essential for automating complex Azure and AWS tasks.  This guide will outline how to establish WinRM using SSH and a self-signed certificate.  A certificate issued from a Certificate Authority would be preferable but for the purpose of establishing a test environment, the steps below are enough to get the technology working.

This demonstration is in three parts.

  1.  Configuring a central “WinRM” server that will be used to remote to client machines
  2. Creating and exporting a self-signed digital certificate to be used by the clients and server
  3. Installing the certificate on remote machines.

In a cloud environment you would expect WinRM to be configured with a valid certificate installed within Windows templates.  All the commands in this guide are PowerShell based and run from an administrative shell.

     Configuring the central WinRM Server

The main body of work on the WinRM server will be the creation of the self-signed certificate.  The certificate will be created with PowerShell but as a security measure, the server won’t be setup to listen for incoming WinRM requests nor will the firewall be opened.   This configuring step will ensure that the PowerShell Execution Policy allows unsigned scripts to run while ensuring the default HTTP listener is disabled.

 

The PowerShell commands are:

   Set-ExecutionPolicy unrestricted

   Enable-PSRemoting –force

   winrm quickconfig

   winrm set winrm/config/Listener?Address=*+Transport=HTTP `@`{Enabled=`"false`"`}

 

At this stage, a WinRM compatible certificate needs to be generated.

Creating the Self-Signed WinRM Certificate

A certificate issued from a certificate authority is always preferable to using self-signing.  Even so, for development environments or getting your head around WinRM self-signing is a simple solution

Included at the end of this post is a PowerShell script that will generate a self-signed certificate capable of encrypting Windows Remote Management.  The certificate must support:

Server Authentication (1.3.6.1.5.5.7.3.1)

The certificate must also include the name of the WinRM server in the format “CN=server.mydomain.com” and have exportable private keys.  The completed certificate along with private keys will be installed on each client machine.

 

 

 

On Remote Clients

 

Enable Windows Remote Management

   Enable-PSRemoting –force

   winrm quickconfig

Configure the Firewall

   netsh advfirewall firewall add rule name="Windows Remote Management (HTTPS-In)" protocol=TCP dir=in localport=5986 action=allow

Windows Remote Management requires the central server (that will issue WinRM commands) to be trusted.  You will need to import the created certificate, disable the HTTP listener, add the central server as a trusted host and create a new listener attached to the imported certificate.

Import Certificates

Manage Computer Certificates -> Personal Store (Local Computer)->All Tasks ->Import

Browse for .pfx file & when prompted enter password

Right-click & copy certificate file.  Right-click and paste to the Trusted Root Certificate Authority store.

Configure WinRM

   winrm set winrm/config/client `@`{TrustedHosts=`"server.mydomain.com`"`}

   winrm set winrm/config/Listener?Address=*+Transport=HTTP `@`{Enabled=`"false`"`}

Create the new listener, substituting the server hostname for your central WINRM server and replacing the certificate thumbprint with the one corresponding to your newly created certificate.

   New-Item WSMan:\localhost\Listener -Address * -Transport HTTPS -HostName "server2012.mydomain.com" -CertificateThumbPrint " A5012956A74B05EB1C639428556C0186EXAMPLE7"

 

Test the Connection from the host / server

Remote PowerShell commands can now be issued from the central server using Invoke-Command.

Also note that IP addresses can be used to connect to remote machines.  When using a remote credential, local accounts may be used by simply dropping the prepended domain when creating the PowerShell Credential Object

The script below uses Vadims Podans brilliant work for creating a self-signed certificate for authorising WinRM communications.  It should be customised to create a unique password for a certificate export and run with Administrative credentials on the intended WinRM server.  The resulting certificate (and keys) may be imported on clients.

<################################################################################################
 #
 #  This script creates a self-signed certificate capable of PowerShell WinRM
 #
 #   Legacy certificate handling used to ensure capability with Windows Server 2008
 #
 #   Version 0.1     6 March 2016    Laurie Rhodes
 #
 #   *** Deserved Credit ***
 #
 #   Primary code leveraged is from Vadims Podans 
 #                           (http://en-us.sysadmins.lv/) for certificate creation
 ####################################################################################>
 
 
 
 #region Contributed Community Functions
# Contributors credited with each function
 
 
function New-SelfSignedCertificateEx {
<#
 
#####################################################################
# New-SelfSignedCertificateEx.ps1
# Version 1.0
#
# Creates self-signed certificate. This tool is a base replacement
# for deprecated makecert.exe
#
# Vadims Podans (c) 2013
# http://en-us.sysadmins.lv/
#####################################################################
#requires -Version 2.0
 
.Synopsis
	This cmdlet generates a self-signed certificate.
.Description
	This cmdlet generates a self-signed certificate with the required data.
.Parameter Subject
	Specifies the certificate subject in a X500 distinguished name format.
	Example: CN=Test Cert, OU=Sandbox
.Parameter NotBefore
	Specifies the date and time when the certificate become valid. 
        By default previous day	date is used.
.Parameter NotAfter
	Specifies the date and time when the certificate expires. By default, 
        the certificate is valid for 1 year.
.Parameter SerialNumber
	Specifies the desired serial number in a hex format.
	Example: 01a4ff2
.Parameter ProviderName
	Specifies the Cryptography Service Provider (CSP) name. You can use 
        either legacy CSP and Key Storage Providers (KSP). By default 
        "Microsoft Enhanced Cryptographic Provider v1.0" CSP is used.
.Parameter AlgorithmName
	Specifies the public key algorithm. By default RSA algorithm is used. 
        RSA is the only	algorithm supported by legacy CSPs. With key storage 
        providers (KSP) you can use CNG	algorithms, like ECDH. For CNG 
        algorithms you must use full name:
	ECDH_P256
	ECDH_P384
	ECDH_P521
 
	In addition, KeyLength parameter must be specified explicitly when 
        non-RSA algorithm is used.
.Parameter KeyLength
	Specifies the key length to generate. By default 2048-bit key is 
        generated.
.Parameter KeySpec
	Specifies the public key operations type. The possible values are: 
        Exchange and Signature.	Default value is Exchange.
.Parameter EnhancedKeyUsage
	Specifies the intended uses of the public key contained in a certificate. 
        You can specify either, EKU friendly name (for example 
        'Server Authentication') or object identifier (OID) value 
        (for example '1.3.6.1.5.5.7.3.1').
.Parameter KeyUsages
	Specifies restrictions on the operations that can be performed 
        by the public key contained in the certificate.
	Possible values (and their respective integer values to make 
        bitwise operations) are:
	EncipherOnly
	CrlSign
	KeyCertSign
	KeyAgreement
	DataEncipherment
	KeyEncipherment
	NonRepudiation
	DigitalSignature
	DecipherOnly
 
	you can combine key usages values by using bitwise OR operation. 
        when combining multiple	flags, they must be enclosed in quotes 
        and separated by a comma character. For example, to combine 
        KeyEncipherment and DigitalSignature flags you should type:
	"KeyEncipherment, DigitalSignature".
 
	If the certificate is CA certificate (see IsCA parameter), key 
        usages extension is generated automatically with the following 
        key usages: Certificate Signing, Off-line CRL Signing, CRL Signing.
.Parameter SubjectAlternativeName
	Specifies alternative names for the subject. Unlike Subject 
        field, this extension allows to specify more than one name. 
        Also, multiple types of alternative names are supported. 
        The cmdlet supports the following SAN types:
	RFC822 Name
	IP address (both, IPv4 and IPv6)
	Guid
	Directory name
	DNS name
.Parameter IsCA
	Specifies whether the certificate is CA (IsCA = $true) or 
        end entity (IsCA = $false) certificate. If this parameter 
        is set to $false, PathLength parameter is ignored.
	Basic Constraints extension is marked as critical.
.PathLength
	Specifies the number of additional CA certificates in the 
        chain under this certificate. If PathLength parameter is 
        set to zero, then no additional (subordinate) CA certificates 
        are permitted under this CA.
.CustomExtension
	Specifies the custom extension to include to a self-signed 
        certificate. This parameter must not be used to specify the 
        extension that is supported via other parameters. In order
	to use this parameter, the extension must be formed in a 
        collection of initialized 
        System.Security.Cryptography.X509Certificates.X509Extension 
        objects.
.Parameter SignatureAlgorithm
	Specifies signature algorithm used to sign the certificate. 
        By default 'SHA1' algorithm is used.
.Parameter FriendlyName
	Specifies friendly name for the certificate.
.Parameter StoreLocation
	Specifies the store location to store self-signed certificate. 
        Possible values are: 'CurrentUser' and 'LocalMachine'. 'CurrentUser' 
        store is intended for user certificates	and computer (as well as CA) 
        certificates must be stored in 'LocalMachine' store.
.Parameter StoreName
	Specifies the container name in the certificate store. 
        Possible container names are:
	AddressBook
	AuthRoot
	CertificateAuthority
	Disallowed
	My
	Root
	TrustedPeople
	TrustedPublisher
.Parameter Path
	Specifies the path to a PFX file to export a self-signed certificate.
.Parameter Password
	Specifies the password for PFX file.
.Parameter AllowSMIME
	Enables Secure/Multipurpose Internet Mail Extensions for the certificate.
.Parameter Exportable
	Marks private key as exportable. Smart card providers usually do not allow
	exportable keys.
.Example
	New-SelfsignedCertificateEx -Subject "CN=Test Code Signing" 
         -EKU "Code Signing" -KeySpec "Signature" `
	-KeyUsage "DigitalSignature" -FriendlyName "Test code signing" -NotAfter [datetime]::now.AddYears(5)
 
	Creates a self-signed certificate intended for code signing and which 
        is valid for 5 years
. Certificate
	is saved in the Personal store of the current user account.
.Example
	New-SelfsignedCertificateEx -Subject "CN=www.domain.com" `
          -EKU "Server Authentication", "Client authentication" `
	-KeyUsage "KeyEcipherment, DigitalSignature" -SAN "sub.domain.com","www.domain.com","192.168.1.1" `
	-AllowSMIME -Path C:\test\ssl.pfx `
         -Password (ConvertTo-SecureString "P@ssw0rd" -AsPlainText -Force) `
        -Exportable `
	-StoreLocation "LocalMachine"
 
	Creates a self-signed SSL certificate with multiple subject names and 
        saves it to a file. Additionally, the certificate is saved in the 
        Personal store of the Local Machine store. Private key is marked as 
        exportable, so you can export the certificate with a associated private 
        key to a file at any time. The certificate includes SMIME capabilities.
.Example
	New-SelfsignedCertificateEx -Subject "CN=www.domain.com" `
        -EKU "Server Authentication", "Client authentication" `
	-KeyUsage "KeyEcipherment, DigitalSignature" -SAN "sub.domain.com","www.domain.com","192.168.1.1" `
	-StoreLocation "LocalMachine" `
        -ProviderName "Microsoft Software Key Storae Provider" -AlgorithmName ecdh_256 `
	-KeyLength 256 -SignatureAlgorithm sha256
 
	Creates a self-signed SSL certificate with multiple subject names and 
         saves it to a file. Additionally, the certificate is saved in the 
        Personal store of the Local Machine store. Private key is marked as exportable,
	so you can export the certificate with a associated private key to a 
        file at any time. Certificate uses
	Ellyptic Curve Cryptography (ECC) key algorithm ECDH with 256-bit key. 
        The certificate is signed by using SHA256 algorithm.
.Example
	New-SelfsignedCertificateEx -Subject "CN=Test Root CA, OU=Sandbox" `
       -IsCA $true -ProviderName `
	"Microsoft Software Key Storage Provider" -Exportable
 
	Creates self-signed root CA certificate.
#>
[CmdletBinding(DefaultParameterSetName = '__store')]
	param (
		[Parameter(Mandatory = $true, Position = 0)]
		[string]$Subject,
		[Parameter(Position = 1)]
		[datetime]$NotBefore = [DateTime]::Now.AddDays(-1),
		[Parameter(Position = 2)]
		[datetime]$NotAfter = $NotBefore.AddDays(365),
		[string]$SerialNumber,
		[Alias('CSP')]
		[string]$ProviderName = "Microsoft Enhanced Cryptographic Provider v1.0",
		[string]$AlgorithmName = "RSA",
		[int]$KeyLength = 2048,
		[validateSet("Exchange","Signature")]
		[string]$KeySpec = "Exchange",
		[Alias('EKU')]
		[Security.Cryptography.Oid[]]$EnhancedKeyUsage,
		[Alias('KU')]
		[Security.Cryptography.X509Certificates.X509KeyUsageFlags]$KeyUsage,
		[Alias('SAN')]
		[String[]]$SubjectAlternativeName,
		[bool]$IsCA,
		[int]$PathLength = -1,
		[Security.Cryptography.X509Certificates.X509ExtensionCollection]$CustomExtension,
		[ValidateSet('MD5','SHA1','SHA256','SHA384','SHA512')]
		[string]$SignatureAlgorithm = "SHA1",
		[string]$FriendlyName,
		[Parameter(ParameterSetName = '__store')]
		[Security.Cryptography.X509Certificates.StoreLocation]$StoreLocation = "CurrentUser",
		[Parameter(ParameterSetName = '__store')]
		[Security.Cryptography.X509Certificates.StoreName]$StoreName = "My",
		[Parameter(Mandatory = $true, ParameterSetName = '__file')]
		[Alias('OutFile','OutPath','Out')]
		[IO.FileInfo]$Path,
		[Parameter(Mandatory = $true, ParameterSetName = '__file')]
		[Security.SecureString]$Password,
		[switch]$AllowSMIME,
		[switch]$Exportable
	)
	$ErrorActionPreference = "Stop"
	if ([Environment]::OSVersion.Version.Major -lt 6) {
		$NotSupported = New-Object NotSupportedException `
               -ArgumentList "Windows XP and Windows Server 2003 are not supported!"
		throw $NotSupported
	}
	$ExtensionsToAdd = @()
 
#region constants
	# contexts
	New-Variable -Name UserContext -Value 0x1 -Option Constant
	New-Variable -Name MachineContext -Value 0x2 -Option Constant
	# encoding
	New-Variable -Name Base64Header -Value 0x0 -Option Constant
	New-Variable -Name Base64 -Value 0x1 -Option Constant
	New-Variable -Name Binary -Value 0x3 -Option Constant
	New-Variable -Name Base64RequestHeader -Value 0x4 -Option Constant
	# SANs
	New-Variable -Name OtherName -Value 0x1 -Option Constant
	New-Variable -Name RFC822Name -Value 0x2 -Option Constant
	New-Variable -Name DNSName -Value 0x3 -Option Constant
	New-Variable -Name DirectoryName -Value 0x5 -Option Constant
	New-Variable -Name URL -Value 0x7 -Option Constant
	New-Variable -Name IPAddress -Value 0x8 -Option Constant
	New-Variable -Name RegisteredID -Value 0x9 -Option Constant
	New-Variable -Name Guid -Value 0xa -Option Constant
	New-Variable -Name UPN -Value 0xb -Option Constant
	# installation options
	New-Variable -Name AllowNone -Value 0x0 -Option Constant
	New-Variable -Name AllowNoOutstandingRequest -Value 0x1 -Option Constant
	New-Variable -Name AllowUntrustedCertificate -Value 0x2 -Option Constant
	New-Variable -Name AllowUntrustedRoot -Value 0x4 -Option Constant
	# PFX export options
	New-Variable -Name PFXExportEEOnly -Value 0x0 -Option Constant
	New-Variable -Name PFXExportChainNoRoot -Value 0x1 -Option Constant
	New-Variable -Name PFXExportChainWithRoot -Value 0x2 -Option Constant
#endregion
 
#region Subject processing
	# http://msdn.microsoft.com/en-us/library/aa377051(VS.85).aspx
	$SubjectDN = New-Object -ComObject X509Enrollment.CX500DistinguishedName
	$SubjectDN.Encode($Subject, 0x0)
#endregion
 
#region Extensions
 
#region Enhanced Key Usages processing
	if ($EnhancedKeyUsage) {
		$OIDs = New-Object -ComObject X509Enrollment.CObjectIDs
		$EnhancedKeyUsage | %{
			$OID = New-Object -ComObject X509Enrollment.CObjectID
			$OID.InitializeFromValue($_.Value)
			# http://msdn.microsoft.com/en-us/library/aa376785(VS.85).aspx
			$OIDs.Add($OID)
		}
		# http://msdn.microsoft.com/en-us/library/aa378132(VS.85).aspx
		$EKU = New-Object -ComObject X509Enrollment.CX509ExtensionEnhancedKeyUsage
		$EKU.InitializeEncode($OIDs)
		$ExtensionsToAdd += "EKU"
	}
#endregion
 
#region Key Usages processing
	if ($KeyUsage -ne $null) {
		$KU = New-Object -ComObject X509Enrollment.CX509ExtensionKeyUsage
		$KU.InitializeEncode([int]$KeyUsage)
		$KU.Critical = $true
		$ExtensionsToAdd += "KU"
	}
#endregion
 
#region Basic Constraints processing
	if ($PSBoundParameters.Keys.Contains("IsCA")) {
		# http://msdn.microsoft.com/en-us/library/aa378108(v=vs.85).aspx
		$BasicConstraints = New-Object -ComObject X509Enrollment.CX509ExtensionBasicConstraints
		if (!$IsCA) {$PathLength = -1}
		$BasicConstraints.InitializeEncode($IsCA,$PathLength)
		$BasicConstraints.Critical = $IsCA
		$ExtensionsToAdd += "BasicConstraints"
	}
#endregion
 
#region SAN processing
	if ($SubjectAlternativeName) {
		$SAN = New-Object -ComObject X509Enrollment.CX509ExtensionAlternativeNames
		$Names = New-Object -ComObject X509Enrollment.CAlternativeNames
		foreach ($altname in $SubjectAlternativeName) {
			$Name = New-Object -ComObject X509Enrollment.CAlternativeName
			if ($altname.Contains("@")) {
				$Name.InitializeFromString($RFC822Name,$altname)
			} else {
				try {
					$Bytes = [Net.IPAddress]::Parse($altname).GetAddressBytes()
					$Name.InitializeFromRawData($IPAddress,$Base64,[Convert]::ToBase64String($Bytes))
				} catch {
					try {
						$Bytes = [Guid]::Parse($altname).ToByteArray()
						$Name.InitializeFromRawData($Guid,$Base64,[Convert]::ToBase64String($Bytes))
					} catch {
						try {
							$Bytes = ([Security.Cryptography.X509Certificates.X500DistinguishedName]$altname).RawData
							$Name.InitializeFromRawData($DirectoryName,$Base64,[Convert]::ToBase64String($Bytes))
						} catch {$Name.InitializeFromString($DNSName,$altname)}
					}
				}
			}
			$Names.Add($Name)
		}
		$SAN.InitializeEncode($Names)
		$ExtensionsToAdd += "SAN"
	}
#endregion
 
#region Custom Extensions
	if ($CustomExtension) {
		$count = 0
		foreach ($ext in $CustomExtension) {
			# http://msdn.microsoft.com/en-us/library/aa378077(v=vs.85).aspx
			$Extension = New-Object -ComObject X509Enrollment.CX509Extension
			$EOID = New-Object -ComObject X509Enrollment.CObjectId
			$EOID.InitializeFromValue($ext.Oid.Value)
			$EValue = [Convert]::ToBase64String($ext.RawData)
			$Extension.Initialize($EOID,$Base64,$EValue)
			$Extension.Critical = $ext.Critical
			New-Variable -Name ("ext" + $count) -Value $Extension
			$ExtensionsToAdd += ("ext" + $count)
			$count++
		}
	}
#endregion
 
#endregion
 
#region Private Key
	# http://msdn.microsoft.com/en-us/library/aa378921(VS.85).aspx
	$PrivateKey = New-Object -ComObject X509Enrollment.CX509PrivateKey
	$PrivateKey.ProviderName = $ProviderName
	$AlgID = New-Object -ComObject X509Enrollment.CObjectId
	$AlgID.InitializeFromValue(([Security.Cryptography.Oid]$AlgorithmName).Value)
	$PrivateKey.Algorithm = $AlgID
	# http://msdn.microsoft.com/en-us/library/aa379409(VS.85).aspx
	$PrivateKey.KeySpec = switch ($KeySpec) {"Exchange" {1}; "Signature" {2}}
	$PrivateKey.Length = $KeyLength
	# key will be stored in current user certificate store
	switch ($PSCmdlet.ParameterSetName) {
		'__store' {
			$PrivateKey.MachineContext = if ($StoreLocation -eq "LocalMachine") {$true} else {$false}
		}
		'__file' {
			$PrivateKey.MachineContext = $false
		}
	}
	$PrivateKey.ExportPolicy = if ($Exportable) {1} else {0}
	$PrivateKey.Create()
#endregion
 
	# http://msdn.microsoft.com/en-us/library/aa377124(VS.85).aspx
	$Cert = New-Object -ComObject X509Enrollment.CX509CertificateRequestCertificate
	if ($PrivateKey.MachineContext) {
		$Cert.InitializeFromPrivateKey($MachineContext,$PrivateKey,"")
	} else {
		$Cert.InitializeFromPrivateKey($UserContext,$PrivateKey,"")
	}
	$Cert.Subject = $SubjectDN
	$Cert.Issuer = $Cert.Subject
	$Cert.NotBefore = $NotBefore
	$Cert.NotAfter = $NotAfter
	foreach ($item in $ExtensionsToAdd) {$Cert.X509Extensions.Add((Get-Variable -Name $item -ValueOnly))}
	if (![string]::IsNullOrEmpty($SerialNumber)) {
		if ($SerialNumber -match "[^0-9a-fA-F]") {throw "Invalid serial number specified."}
		if ($SerialNumber.Length % 2) {$SerialNumber = "0" + $SerialNumber}
		$Bytes = $SerialNumber -split "(.{2})" | ?{$_} | %{[Convert]::ToByte($_,16)}
		$ByteString = [Convert]::ToBase64String($Bytes)
		$Cert.SerialNumber.InvokeSet($ByteString,1)
	}
	if ($AllowSMIME) {$Cert.SmimeCapabilities = $true}
	$SigOID = New-Object -ComObject X509Enrollment.CObjectId
	$SigOID.InitializeFromValue(([Security.Cryptography.Oid]$SignatureAlgorithm).Value)
	$Cert.SignatureInformation.HashAlgorithm = $SigOID
	# completing certificate request template building
	$Cert.Encode()
 
	# interface: http://msdn.microsoft.com/en-us/library/aa377809(VS.85).aspx
	$Request = New-Object -ComObject X509Enrollment.CX509enrollment
	$Request.InitializeFromRequest($Cert)
	$Request.CertificateFriendlyName = $FriendlyName
	$endCert = $Request.CreateRequest($Base64)
	$Request.InstallResponse($AllowUntrustedCertificate,$endCert,$Base64,"")
	switch ($PSCmdlet.ParameterSetName) {
		'__file' {
			$PFXString = $Request.CreatePFX(
				[Runtime.InteropServices.Marshal]::PtrToStringAuto([Runtime.InteropServices.Marshal]::SecureStringToBSTR($Password)),
				$PFXExportEEOnly,
				$Base64
			)
			Set-Content -Path $Path -Value ([Convert]::FromBase64String($PFXString)) -Encoding Byte
		}
	}
}
 
 
#endregion
 
 
 
<##############################################################################
 #  Create-WinRMCert (-FriendlyName "WinRMCert" -ExportPassword "MyPassword")
 #
 #          Creates a self-signed cerificate for use with WinRM
 ##############################################################################>
function Create-WinRMCert(){
	param (
        # Create a Unique Friendly Name tag
		[Parameter(Mandatory = $false)]
		[string]$FriendlyName,
		[Parameter(Mandatory = $true)]
		[string]$ExportPassword
)
 
$ipProperties = [System.Net.NetworkInformation.IPGlobalProperties]::GetIPGlobalProperties()
$Hostname ={0}.{1}-f $ipProperties.Hostname,$ipProperties.DomainName
$Hostname = $Hostname.ToLower() 
 
# The File location for the exported Certificate
$ExportCertFile    = "$($env:TEMP)\$($Hostname).pfx"
 
If (-NOT ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole(`
    [Security.Principal.WindowsBuiltInRole] "Administrator"))
{
    Write-Warning "Script must be run with Admin Privileges"
    Break
}
 
 
New-SelfSignedCertificateEx -Subject "CN=$($Hostname)"  `
 -StoreLocation LocalMachine -StoreName My -FriendlyName $FriendlyName `
 -EnhancedKeyUsage @("1.3.6.1.5.5.7.3.1") -Exportable -SignatureAlgorithm SHA256 
 
 
# Create a handle to the certificate
# Note that multiple certificates with the same friendly name could be returned
# We will assume the desired certificate is the first in the returned array
$foundCertArray = get-childitem cert:\LocalMachine\My | where-object {$_.FriendlyName -eq  $FriendlyName }
 
 
#Export the Certificate - can't rely upon 'Export-Certificate' being available
"Exporting Certificate $($foundCertArray[0].Thumbprint)"
 
If (Test-Path $ExportCertFile){ Remove-Item $ExportCertFile }
 
 
$type = [System.Security.Cryptography.X509Certificates.X509ContentType]::pfx
 
[byte[]]$Bytes  = $foundCertArray[0].Export($type, $ExportPassword)
 
[io.file]::WriteAllBytes($ExportCertFile,$Bytes)
 
 
 
</pre>
 
<pre>
  Write-Debug "Thumbprint = $(<span style="font-size:1.2em; line-height:1.5">$foundCertArray[0]</span><span style="font-size:1.2em; line-height:1.5">.Thumbprint)"</span></pre>
 
<pre>
  Start-Process -FilePath "C:\Windows\Explorer.exe" -ArgumentList "$($env:TEMP)"
}
 
 
 
#### Call the example script
cls
 
Create-WinRMCert -FriendlyName "WinRMCert" -ExportPassword "MyPassword"

 

Next related blog:

PowerShell DSC - using an IP address to a Workgroup Machine - http://www.laurierhodes.info/?q=node/119