WinRM Setup

winrm-config.ps1

Function New-LegacySelfSignedCert
{
    Param (
        [string]$SubjectName = $env:COMPUTERNAME,
        [int]$ValidDays = 1095
    )

    $hostnonFQDN = $env:computerName
    $hostFQDN = [System.Net.Dns]::GetHostByName(($env:computerName)).Hostname
    $SignatureAlgorithm = "SHA256"

    $name = New-Object -COM "X509Enrollment.CX500DistinguishedName.1"
    $name.Encode("CN=$SubjectName", 0)

    $key = New-Object -COM "X509Enrollment.CX509PrivateKey.1"
    $key.ProviderName = "Microsoft Enhanced RSA and AES Cryptographic Provider"
    $key.KeySpec = 1
    $key.Length = 4096
    $key.SecurityDescriptor = "D:PAI(A;;0xd01f01ff;;;SY)(A;;0xd01f01ff;;;BA)(A;;0x80120089;;;NS)"
    $key.MachineContext = 1
    $key.Create()

    $serverauthoid = New-Object -COM "X509Enrollment.CObjectId.1"
    $serverauthoid.InitializeFromValue("1.3.6.1.5.5.7.3.1")
    $ekuoids = New-Object -COM "X509Enrollment.CObjectIds.1"
    $ekuoids.Add($serverauthoid)
    $ekuext = New-Object -COM "X509Enrollment.CX509ExtensionEnhancedKeyUsage.1"
    $ekuext.InitializeEncode($ekuoids)

    $cert = New-Object -COM "X509Enrollment.CX509CertificateRequestCertificate.1"
    $cert.InitializeFromPrivateKey(2, $key, "")
    $cert.Subject = $name
    $cert.Issuer = $cert.Subject
    $cert.NotBefore = (Get-Date).AddDays(-1)
    $cert.NotAfter = $cert.NotBefore.AddDays($ValidDays)

    $SigOID = New-Object -ComObject X509Enrollment.CObjectId
    $SigOID.InitializeFromValue(([Security.Cryptography.Oid]$SignatureAlgorithm).Value)

    [string[]] $AlternativeName  += $hostnonFQDN
    $AlternativeName += $hostFQDN
    $IAlternativeNames = New-Object -ComObject X509Enrollment.CAlternativeNames

    foreach ($AN in $AlternativeName)
    {
        $AltName = New-Object -ComObject X509Enrollment.CAlternativeName
        $AltName.InitializeFromString(0x3,$AN)
        $IAlternativeNames.Add($AltName)
    }

    $SubjectAlternativeName = New-Object -ComObject X509Enrollment.CX509ExtensionAlternativeNames
    $SubjectAlternativeName.InitializeEncode($IAlternativeNames)

    [String[]]$KeyUsage = ("DigitalSignature", "KeyEncipherment")
    $KeyUsageObj = New-Object -ComObject X509Enrollment.CX509ExtensionKeyUsage
    $KeyUsageObj.InitializeEncode([int][Security.Cryptography.X509Certificates.X509KeyUsageFlags]($KeyUsage))
    $KeyUsageObj.Critical = $true

    $cert.X509Extensions.Add($KeyUsageObj)
    $cert.X509Extensions.Add($ekuext)
    $cert.SignatureInformation.HashAlgorithm = $SigOID
    $CERT.X509Extensions.Add($SubjectAlternativeName)
    $cert.Encode()

    $enrollment = New-Object -COM "X509Enrollment.CX509Enrollment.1"
    $enrollment.InitializeFromRequest($cert)
    $certdata = $enrollment.CreateRequest(0)
    $enrollment.InstallResponse(2, $certdata, 0, "")

    # extract/return the thumbprint from the generated cert
    $parsed_cert = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2
    $parsed_cert.Import([System.Text.Encoding]::UTF8.GetBytes($certdata))

    return $parsed_cert.Thumbprint
}

$thumbprint = New-LegacySelfSignedCert -SubjectName $SubjectName -ValidDays $CertValidityDays -CertstoreLocation Cert:\LocalMachine\My

Write-HostLog "Self-signed SSL certificate generated; thumbprint: $thumbprint"

# Create the hashtables of settings to be used.
$valueset = @{
    Hostname = $SubjectName
    CertificateThumbprint = $thumbprint
}

$selectorset = @{
    Transport = "HTTPS"
    Address = "*"
}

Write-Verbose "Enabling SSL listener."
New-WSManInstance -ResourceURI 'winrm/config/Listener' -SelectorSet $selectorset -ValueSet $valueset
winrm set winrm/config/service/auth '@{Basic="true"}'