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MSAppProxy.ps1
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MSAppProxy.ps1
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# This file contains functions for Microsoft App Proxy
Add-Type -AssemblyName System.Web
# Registers App proxy agent to the Azure AD
# Apr 2nd 2020
# May 5th 2022: Added UpdateTrust
function Register-ProxyAgent
{
<#
.SYNOPSIS
Registers a new MS App Proxy agent to Azure AD
.DESCRIPTION
Registers a new MS App Proxy agent to Azure AD. Currently Sync and PTA agents are supported.
.PARAMETER MachineName
Machine name used to register the proxy agent
.PARAMETER AgentType
Type of the proxy agent. One of "PTA","Sync"
.PARAMETER AgentGroup
The Agent group where to add the new agent.
.PARAMETER UpdateTrust
Instead of register a new agent, updates the trust of existing one. As a result, a new proxy certificate is created.
.PARAMETER Bootstrap
Filename of existing bootstrap configuration file.
.PARAMETER PfxFileName
The name of an existing proxy agent certificate used to update trust.
.PARAMETER PfxPassword
Password of the existing proxy agent certificate.
.Example
$pt=Get-AADIntAccessTokenForPTA
PS C:\>Register-AADIntProxyAgent -AccessToken $pt -MachineName server1.company.com -AgentType PTA -FileName server1-pta.pfx
.Example
$pt=Get-AADIntAccessTokenForPTA
PS C:\>Register-AADIntProxyAgent -AccessToken $pt -MachineName server2.company.com -AgentType Sync -FileName server2-sync.pfx
#>
[cmdletbinding()]
Param(
[Parameter(Mandatory=$False)]
[String]$AccessToken,
[Parameter(Mandatory=$True)]
[String]$MachineName,
[Parameter(Mandatory=$False)]
[String]$FileName,
[Parameter(Mandatory=$True)]
[Validateset("PTA","Sync")]
[String]$AgentType,
[Parameter(Mandatory=$False)]
$AgentGroup,
[Parameter(Mandatory=$False)]
[bool]$UpdateTrust,
[Parameter(Mandatory=$False)]
[String]$Bootstrap,
[Parameter(Mandatory=$False)]
[String]$PfxFileName,
[Parameter(Mandatory=$False)]
[string]$PfxPassword
)
Begin
{
$AgentInfo=@{
"PTA"= @{
"FeatureString" = "PassthroughAuthentication"
"UserAgent" = "PassthroughAuthenticationConnector/1.5.643.0"
}
"Sync"= @{
"FeatureString" = "SyncFabric"
"UserAgent" = "SyncFabricConnector/1.1.96.0"
}
}
}
Process
{
if($UpdateTrust)
{
# Load the old certificate
$cert = Load-Certificate -FileName $PfxFileName -Password $PfxPassword -Exportable
$tenantId = $cert.Subject.Split("=")[1]
}
else
{
# Get from cache if not provided
$AccessToken = Get-AccessTokenFromCache -AccessToken $AccessToken -Resource "https://proxy.cloudwebappproxy.net/registerapp" -ClientId "cb1056e2-e479-49de-ae31-7812af012ed8"
$tenantId = Get-TenantID -AccessToken $AccessToken
}
# Set some variables
$OSLanguage="1033"
$OSLocale="0409"
$OSSku="8"
$OSVersion="10.0.17763"
# Create a private key and do something with it to get it stored
$rsa=[System.Security.Cryptography.RSA]::Create(2048)
# Initialize the Certificate Signing Request object
$CN="" # The name doesn't matter
$req = [System.Security.Cryptography.X509Certificates.CertificateRequest]::new($CN, $rsa, [System.Security.Cryptography.HashAlgorithmName]::SHA256,[System.Security.Cryptography.RSASignaturePadding]::Pkcs1)
if($AgentType -eq "PTA")
{
# Key usage
$req.CertificateExtensions.Add([System.Security.Cryptography.X509Certificates.X509KeyUsageExtension]::new([System.Security.Cryptography.X509Certificates.X509KeyUsageFlags]::DigitalSignature -bor [System.Security.Cryptography.X509Certificates.X509KeyUsageFlags]::NonRepudiation -bor [System.Security.Cryptography.X509Certificates.X509KeyUsageFlags]::KeyEncipherment -bor [System.Security.Cryptography.X509Certificates.X509KeyUsageFlags]::DataEncipherment, $false))
# TLS Web client authentication
$oidCollection = [System.Security.Cryptography.OidCollection]::new()
$oidCollection.Add([System.Security.Cryptography.Oid]::new("1.3.6.1.5.5.7.3.2")) | Out-Null
$req.CertificateExtensions.Add([System.Security.Cryptography.X509Certificates.X509EnhancedKeyUsageExtension]::new($oidCollection, $true))
# Add the public Key to the request
$req.CertificateExtensions.Add([System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtension]::new($req.PublicKey,$false))
# Create the signing request
$csr=$req.CreateSigningRequest()
}
elseif($AgentType -eq "Sync")
{
# This must be done this way cause MS CSR classes doesn't support attributes :(
$csr = NewCSRforSync -MachineName $MachineName -PublicKey $req.PublicKey.EncodedKeyValue.RawData
}
$b64Csr=[convert]::ToBase64String($csr)
# Create the request body
if($UpdateTrust)
{
if($Bootstrap -and (Test-Path $Bootstrap))
{
Write-Verbose "Loading bootstrap from $Bootstrap"
[xml]$config = Get-Content -Path $Bootstrap -Encoding UTF8
}
else
{
Write-Verbose "Getting bootstrap using $($cert.Thumbprint) as $MachineName"
[xml]$config = Get-BootstrapConfiguration -Certificate $cert -MachineName $MachineName
}
if(!$config)
{
Write-Error "Could not load bootstrap!"
return
}
$trustEndpoint = $config.BootstrapResponse.TrustRenewEndpoint
$body=@"
<TrustRenewalRequest xmlns="http://schemas.datacontract.org/2004/07/Microsoft.ApplicationProxy.Common.Registration.TrustRenewal" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<Base64Csr xmlns="http://schemas.datacontract.org/2004/07/Microsoft.ApplicationProxy.Common.Registration">$b64Csr
</Base64Csr>
<TrustRenewalRequestSettings>
<SystemSettingsInformation i:type="a:SystemSettings" xmlns="http://schemas.datacontract.org/2004/07/Microsoft.ApplicationProxy.Common.RegistrationCommons" xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.ApplicationProxy.Common.Utilities.SystemSettings">
<a:MachineName>$machineName</a:MachineName>
<a:OsLanguage>$OSLanguage</a:OsLanguage>
<a:OsLocale>$OSLocale</a:OsLocale>
<a:OsSku>$OSSku</a:OsSku>
<a:OsVersion>$OSVersion</a:OsVersion>
</SystemSettingsInformation>
<ConnectorVersion>1.5.2482.0</ConnectorVersion>
</TrustRenewalRequestSettings>
</TrustRenewalRequest>
"@
# Renew trust and get the certificate
$response = Invoke-RestMethod -UseBasicParsing -Uri "$trustEndPoint/RenewTrustCertificate" -Method Post -Body $body -Headers @{"Content-Type"="application/xml; charset=utf-8"} -Certificate $cert
if($response.TrustRenewalResult.IsSuccessful.'#text' -eq "true")
{
# Get the certificate
$b64Cert = $response.TrustRenewalResult.Certificate.'#text'
}
else
{
# Something went wrong
Write-Error $response.TrustRenewalResult.ErrorMessage.'#text'
}
}
else
{
$body=@"
<RegistrationRequest xmlns="http://schemas.datacontract.org/2004/07/Microsoft.ApplicationProxy.Common.Registration" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<Base64Csr>$b64Csr
</Base64Csr>
<AuthenticationToken>$AccessToken</AuthenticationToken>
<Base64Pkcs10Csr i:nil="true"/>
<Feature>ApplicationProxy</Feature>
<FeatureString>$($AgentInfo[$AgentType]["FeatureString"])</FeatureString>
<RegistrationRequestSettings>
<SystemSettingsInformation i:type="a:SystemSettings" xmlns="http://schemas.datacontract.org/2004/07/Microsoft.ApplicationProxy.Common.RegistrationCommons" xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.ApplicationProxy.Common.Utilities.SystemSettings">
<a:MachineName>$machineName</a:MachineName>
<a:OsLanguage>$OSLanguage</a:OsLanguage>
<a:OsLocale>$OSLocale</a:OsLocale>
<a:OsSku>$OSSku</a:OsSku>
<a:OsVersion>$OSVersion</a:OsVersion>
</SystemSettingsInformation>
<PSModuleVersion>1.5.643.0</PSModuleVersion>
<SystemSettings i:type="a:SystemSettings" xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.ApplicationProxy.Common.Utilities.SystemSettings">
<a:MachineName>$machineName</a:MachineName>
<a:OsLanguage>$OSLanguage</a:OsLanguage>
<a:OsLocale>$OSLocale</a:OsLocale>
<a:OsSku>$OSSku</a:OsSku>
<a:OsVersion>$OSVersion</a:OsVersion>
</SystemSettings>
</RegistrationRequestSettings>
<TenantId>$tenantId</TenantId>
<UserAgent>$($AgentInfo[$AgentType]["UserAgent"])</UserAgent>
</RegistrationRequest>
"@
# Register the app and get the certificate
$response = Invoke-RestMethod -UseBasicParsing -Uri "https://$tenantId.registration.msappproxy.net/register/RegisterConnector" -Method Post -Body $body -Headers @{"Content-Type"="application/xml; charset=utf-8"}
if($response.RegistrationResult.IsSuccessful -eq "true")
{
# Get the certificate
$b64Cert = $response.RegistrationResult.Certificate
}
else
{
# Something went wrong
Write-Error $response.RegistrationResult.ErrorMessage
}
}
if(![string]::IsNullOrEmpty($b64Cert))
{
# Convert certificate to byte array
$binCert = [convert]::FromBase64String($b64Cert)
# Create a new x509certificate
$cert = [System.Security.Cryptography.X509Certificates.X509Certificate2]::new($binCert,"",[System.Security.Cryptography.X509Certificates.X509KeyStorageFlags]::UserKeySet -band [System.Security.Cryptography.X509Certificates.X509KeyStorageFlags]::Exportable)
# Get the instance Id (=Agent Id)
foreach($extension in $cert.Extensions)
{
if($extension.Oid.Value -eq "1.3.6.1.4.1.311.82.1")
{
$InstanceID = [guid]$extension.RawData
}
}
if([string]::IsNullOrEmpty($FileName))
{
$FileName = "$($MachineName)_$($tenantId)_$($InstanceID)_$($cert.Thumbprint).pfx"
}
# Store the private key so that it can be exported
$cspParameters = [System.Security.Cryptography.CspParameters]::new()
$cspParameters.ProviderName = "Microsoft Enhanced RSA and AES Cryptographic Provider"
$cspParameters.ProviderType = 24
$cspParameters.KeyContainerName ="AADInternals"
# Set the private key
$privateKey = [System.Security.Cryptography.RSACryptoServiceProvider]::new(2048,$cspParameters)
$privateKey.ImportParameters($rsa.ExportParameters($true))
$cert.PrivateKey = $privateKey
# Export the certificate to pfx
$binCert = $cert.Export([System.Security.Cryptography.X509Certificates.X509ContentType]::Pfx)
Set-BinaryContent -Path $fileName -Value $binCert
# Remove the private key from the store
$privateKey.PersistKeyInCsp=$false
$privateKey.Clear()
if($UpdateTrust)
{
Write-Host "$AgentType Agent ($InstanceID) certificate renewed for $MachineName"
}
else
{
Write-Host "$AgentType Agent ($InstanceID) registered as $MachineName"
}
Write-Host "Certificate saved to $FileName"
# We need to register the agent to a group
if($AgentType -eq "Sync" -and [string]::IsNullOrEmpty($AgentGroup) -ne $true)
{
Add-ProxyAgentToGroup -AccessToken $AccessToken -Agent $InstanceID -Group $AgentGroup
}
}
}
}
# Gets list of publishing agents
# Apr 3rd 2020
function Get-ProxyAgents
{
<#
.SYNOPSIS
Shows the list of MS App Proxy agents
.DESCRIPTION
Shows the list of MS App Proxy authentication and provisioning agents
.Example
Get-AADIntProxyAgents | ft
id machineName externalIp status supportedPublishingTypes
-- ----------- ---------- ------ ------------------------
51f3afd9-685b-413a-aafa-bab0d556ea4b this.is.a.fake 67.35.155.73 active {authentication}
51a061a0-968d-48b8-951e-5ae9d9a0441f server1.company.com 93.188.31.116 inactive {authentication}
49c9ad46-c067-42f6-a678-dfd938c27789 server2.company.com 102.20.104.213 inactive {provisioning}
.Example
$pt=Get-AADIntAccessTokenForPTA
PS C:\>Get-AADIntProxyAgents -AccessToken $pt | pt
id machineName externalIp status supportedPublishingTypes
-- ----------- ---------- ------ ------------------------
51f3afd9-685b-413a-aafa-bab0d556ea4b this.is.a.fake 67.35.155.73 active {authentication}
51a061a0-968d-48b8-951e-5ae9d9a0441f server1.company.com 93.188.31.116 inactive {authentication}
49c9ad46-c067-42f6-a678-dfd938c27789 server2.company.com 102.20.104.213 inactive {provisioning}
#>
[cmdletbinding()]
Param(
[Parameter(Mandatory=$False)]
[String]$AccessToken
)
Begin
{
$publishingTypes = @( # Roles that can access the agent
#"appProxy" # ApplicationAdmin, GlobalAdmin
"authentication" # GlobalAdmin
"provisioning" # GlobalAdmin
"exchangeOnline" # GlobalAdmin
#"intunePfx" # GlobalAdmin
#"oflineDomainJoin" # GlobalAdmin
"adAdministration" # DirSyncAdmin, GlobalAdmin
#"unknownFutureValue" #
)
}
Process
{
# Get from cache if not provided
$AccessToken = Get-AccessTokenFromCache -AccessToken $AccessToken -Resource "https://proxy.cloudwebappproxy.net/registerapp" -ClientId "cb1056e2-e479-49de-ae31-7812af012ed8"
# Get the tenant id and instance id from the certificate
$TenantId = Get-TenantID -AccessToken $AccessToken
$headers = @{
"Authorization" = "Bearer $AccessToken"
"x-ms-gateway-serviceRoot" =""
}
foreach($type in $publishingTypes)
{
$agents = Invoke-RestMethod -UseBasicParsing -Uri "https://$TenantId.admin.msappproxy.net/onPremisesPublishingProfiles('$type')/agents" -Method Get -Headers $headers -ErrorAction SilentlyContinue
# Return
if($agents)
{
$agents.value
}
}
}
}
# Gets list of agent groups
# Apr 6th 2020
function Get-ProxyAgentGroups
{
<#
.SYNOPSIS
Lists MS App Proxy agent groups
.DESCRIPTION
Lists MS App Proxy agent groups
.Example
Get-AADIntAgentProxyGroups
TenantId : ea664074-37dd-4797-a676-b0cf6fdafcd4
ConfigurationDisplayName : company.com
ConfigurationResourceName : company.com
ConfigurationPublishingType : provisioning
id : 4b6ffe82-bfe2-4357-814c-09da95399da7
displayName : Group-company.com-42660f4a-9e66-4a08-ac17-2a2e0d8b993e
publishingType : provisioning
isDefault : False
.Example
$pt=Get-AADIntAccessTokenForPTA
PS C:\>Get-AADIntProxyGroups -AccessToken $pt
TenantId : ea664074-37dd-4797-a676-b0cf6fdafcd4
ConfigurationDisplayName : company.com
ConfigurationResourceName : company.com
ConfigurationPublishingType : provisioning
id : 4b6ffe82-bfe2-4357-814c-09da95399da7
displayName : Group-company.com-42660f4a-9e66-4a08-ac17-2a2e0d8b993e
publishingType : provisioning
isDefault : False
#>
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$AccessToken
)
Process
{
# Get from cache if not provided
$AccessToken = Get-AccessTokenFromCache -AccessToken $AccessToken -Resource "https://proxy.cloudwebappproxy.net/registerapp" -ClientId "cb1056e2-e479-49de-ae31-7812af012ed8"
# Get the tenant id and instance id from the certificate
$TenantId = Get-TenantID -AccessToken $AccessToken
$headers = @{
"Authorization" = "Bearer $AccessToken"
"x-ms-gateway-serviceRoot" =""
}
$response = Invoke-RestMethod -UseBasicParsing -Uri "https://$TenantId.admin.msappproxy.net/onPremisesPublishingProfiles('provisioning')/agentGroups?`$expand=agents" -Method Get -Headers $headers
# return
$response.value
}
}
# Gets the list of proxy configurations
#function Get-ProxyConfigurations
# Creates a new proxy agent group
# Apr 6th 2020
function New-ProxyAgentGroup
{
<#
.SYNOPSIS
Creates an MS App Proxy agent group
.DESCRIPTION
Creates an MS App Proxy agent group
.Example
Get-AADIntAgentProxyGroups
TenantId : ea664074-37dd-4797-a676-b0cf6fdafcd4
ConfigurationDisplayName : company.com
ConfigurationResourceName : company.com
ConfigurationPublishingType : provisioning
id : 4b6ffe82-bfe2-4357-814c-09da95399da7
displayName : Group-company.com-42660f4a-9e66-4a08-ac17-2a2e0d8b993e
publishingType : provisioning
isDefault : False
.Example
$pt=Get-AADIntAccessTokenForPTA
PS C:\>Get-AADIntProxyGroups -AccessToken $pt
TenantId : ea664074-37dd-4797-a676-b0cf6fdafcd4
ConfigurationDisplayName : company.com
ConfigurationResourceName : company.com
ConfigurationPublishingType : provisioning
id : 4b6ffe82-bfe2-4357-814c-09da95399da7
displayName : Group-company.com-42660f4a-9e66-4a08-ac17-2a2e0d8b993e
publishingType : provisioning
isDefault : False
#>
[cmdletbinding()]
Param(
[Parameter(Mandatory=$False)]
[String]$AccessToken,
[Parameter(Mandatory=$True)]
[String]$DisplayName,
[Parameter(Mandatory=$True)]
[String]$ConfigurationDisplayName,
[Parameter(Mandatory=$True)]
[String]$ConfigurationResourceName
)
Process
{
# Get from cache if not provided
$AccessToken = Get-AccessTokenFromCache -AccessToken $AccessToken -Resource "https://proxy.cloudwebappproxy.net/registerapp" -ClientId "cb1056e2-e479-49de-ae31-7812af012ed8"
# Get the tenant id and instance id from the certificate
$TenantId = Get-TenantID -AccessToken $AccessToken
$headers = @{
"Authorization" = "Bearer $AccessToken"
"x-ms-gateway-serviceRoot" =""
"Content-Type" = "application/json"
}
# First, create the agent group with the given name
$Body = "{""displayName"":""$DisplayName""}"
$response = Invoke-RestMethod -UseBasicParsing -Uri "https://$TenantId.admin.msappproxy.net/onPremisesPublishingProfiles('provisioning')/agentGroups" -Method POST -Headers $headers -Body $Body
$Body = "{""displayName"":""$ConfigurationDisplayName"",""resourceName"":""$ConfigurationResourceName"",""agentGroups"":[{""id"":""$($response.id)""}]}"
$response2 = Invoke-RestMethod -UseBasicParsing -Uri "https://$TenantId.admin.msappproxy.net/onPremisesPublishingProfiles('provisioning')/publishedResources" -Method POST -Headers $headers -Body $Body
# Extract the information and create the return value
$attributes=[ordered]@{}
$attributes["id"]=$response.id
$attributes["displayName"]=$response.displayName
$attributes["publishingType"]=$response.publishingType
$attributes["isDefault"]=$response.isDefault
$attributes["ConfigurationId"]=$response2.id
$attributes["ConfigurationDisplayName"]=$response2.displayName
$attributes["ConfigurationResourceName"]=$response2.resourceName
$attributes["ConfigurationPublishingType"]=$response2.publishingType
# return
New-Object PSObject -Property $attributes
}
}
# Adds the given agent to given group
# Apr 7th 2020
function Add-ProxyAgentToGroup
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$False)]
[String]$AccessToken,
[Parameter(Mandatory=$True)]
[guid]$Agent,
[Parameter(Mandatory=$True)]
[guid]$Group
)
Process
{
# Get from cache if not provided
$AccessToken = Get-AccessTokenFromCache -AccessToken $AccessToken -Resource "https://proxy.cloudwebappproxy.net/registerapp" -ClientId "cb1056e2-e479-49de-ae31-7812af012ed8"
# Get the tenant id and instance id from the certificate
$TenantId = Get-TenantID -AccessToken $AccessToken
$body="{""@odata.id"":""https://$TenantId.admin.msappproxy.net:443/onPremisesPublishingProfiles('provisioning')/agentGroups('$($Group.toString())')""}"
$headers = @{
"Authorization" = "Bearer $AccessToken"
"x-ms-gateway-serviceRoot" =""
"Content-Type" = "application/json"
}
Invoke-RestMethod -UseBasicParsing -Uri "https://$TenantId.admin.msappproxy.net/onPremisesPublishingProfiles('provisioning')/agents('$($Agent.toString())')/agentGroups/`$ref" -Method Post -Headers $headers -Body $body
Write-Host "Agent ($($Agent.toString())) added to group ($($Group.toString()))"
}
}
# Export proxy agent certificates from the local computer
# Mar 8th 2022
# Aug 17th 2022: Added support for exporting from NETWORK SERVICE personal store
function Export-ProxyAgentCertificates
{
<#
.SYNOPSIS
Export certificates of all MS App Proxy agents from the local computer.
.DESCRIPTION
Export certificates of all MS App Proxy agents from the local computer.
The filename of the certificate is <server FQDN>_<tenant id>_<agent id>_<cert thumbprint>.pfx
.Example
Export-AADIntProxyAgentCertificates
WARNING: Elevating to LOCAL SYSTEM. You MUST restart PowerShell to restore PTA01\Administrator rights.
Certificate saved to: PTA01.company.com_ea664074-37dd-4797-a676-b0cf6fdafcd4_4b6ffe82-bfe2-4357-814c-09da95399da7_A3457AEAE25D4C513BCF37CB138628772BE1B52.pfx
#>
[cmdletbinding()]
Param()
Process
{
# Get all certificates from LocalMachine Personal store
$certificates = @(Get-Item Cert:\LocalMachine\My\*)
# Internal function to parse PTA & Provisioning agent configs
function Parse-ConfigCert
{
[cmdletbinding()]
Param(
[String]$ConfigPath
)
Process
{
# Check if we have a PTA or provisioning agent configuration and get the certificate if stored in NETWORK SERVICE personal store
[xml]$trustConfig = Get-Content "$env:ProgramData\Microsoft\$ConfigPath\Config\TrustSettings.xml" -ErrorAction SilentlyContinue
if($trustConfig)
{
$thumbPrint = $trustConfig.ConnectorTrustSettingsFile.CloudProxyTrust.Thumbprint
# Check where the certificate is stored
if($trustConfig.ConnectorTrustSettingsFile.CloudProxyTrust.IsInUserStore.ToLower().equals("true"))
{
# Certificate is stored in NETWORK SERVICE personal store so we need to parse it from there
Write-Verbose "Parsing certificate: $($thumbPrint)"
Parse-CertBlob -Data (Get-BinaryContent "$env:windir\ServiceProfiles\NetworkService\AppData\Roaming\Microsoft\SystemCertificates\My\Certificates\$thumbPrint")
}
}
}
}
if($PTACert = Parse-ConfigCert -ConfigPath "Azure AD Connect Authentication Agent")
{
$binCert = $PTACert.DER
$certificate = [System.Security.Cryptography.X509Certificates.X509Certificate2]::new([byte[]]$binCert)
$PTAKeyName = $PTACert.KeyName
$certificates += $certificate
}
if($ProvCert = Parse-ConfigCert -ConfigPath "Azure AD Connect Provisioning Agent")
{
$binCert = $ProvCert.DER
$certificate = [System.Security.Cryptography.X509Certificates.X509Certificate2]::new([byte[]]$binCert)
$ProvKeyName = $ProvCert.KeyName
$certificates += $certificate
}
$CurrentUser = "{0}\{1}" -f $env:USERDOMAIN,$env:USERNAME
Write-Warning "Elevating to LOCAL SYSTEM. You MUST restart PowerShell to restore $CurrentUser rights."
foreach($certificate in $certificates)
{
Write-Verbose "Reading certificate: $($certificate.Thumbprint)"
foreach($ext in $Certificate.Extensions)
{
# Check the agent Id OID exist
if($ext.Oid.Value -eq "1.3.6.1.4.1.311.82.1")
{
# Extract agent and tenant IDs
$agentId = [guid] $ext.RawData
$tenantId = [guid] $certificate.Subject.Split("=")[1]
Write-Verbose " Tenant Id: $tenantId, Agent Id: $agentId"
# Get the certificate
$binCert = $certificate.Export([System.Security.Cryptography.X509Certificates.X509ContentType]::Cert)
# Get the key blob and decrypt the keys
if($PTACert)
{
# If stored in NETWORK SERVICE store, PTA Agent's key name can't be readed from the certificate
$keyName = $PTAKeyName
}
elseif($ProvCert)
{
# If stored in NETWORK SERVICE store, Provisioning Agent's key name can't be readed from the certificate
$keyName = $ProvKeyName
}
else
{
# Read the key name from the certificate
$keyName = [System.Security.Cryptography.X509Certificates.RSACertificateExtensions]::GetRSAPrivateKey($certificate).key.uniquename
}
# Discard trailing null, cr, lf
$keyName = $keyName.trimEnd(@(0x00,0x0a,0x0d))
$paths = @(
"$env:ALLUSERSPROFILE\Microsoft\Crypto\RSA\MachineKeys\$keyName"
"$env:ALLUSERSPROFILE\Microsoft\Crypto\Keys\$keyName"
"$env:windir\ServiceProfiles\NetworkService\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-20\$keyName"
)
foreach($path in $paths)
{
$keyBlob = Get-BinaryContent $path -ErrorAction SilentlyContinue
if($keyBlob)
{
Write-Verbose "Key loaded from $path"
break
}
}
if(!$keyBlob)
{
if($keyName.EndsWith(".PCPKEY"))
{
# This machine has a TPM
Throw "PCP keys are not supported, unable to export private key!"
}
else
{
Throw "Error accessing key. If you are already elevated to LOCAL SYSTEM, restart PowerShell and try again."
}
return
}
$blobType = [System.BitConverter]::ToInt32($keyBlob,0)
switch($blobType)
{
1 { $privateKey = Parse-CngBlob -Data $keyBlob -Decrypt -LocalMachine}
2 { $privateKey = Parse-CapiBlob -Data $keyBlob -Decrypt -LocalMachine}
default { throw "Unsupported key blob type" }
}
# Save to pfx file
$machineName = Get-ComputerName -FQDN
$fileName = "$($machineName)_$($tenantId)_$($agentId)_$($certificate.Thumbprint).pfx"
Set-BinaryContent -Path $fileName -Value (New-PfxFile -RSAParameters ($privateKey.RSAParameters) -X509Certificate $binCert)
# Set the modified date
(Get-Item -Path $fileName).LastWriteTime = $certificate.NotBefore
Write-Host "Certificate saved to: $fileName"
break
}
}
}
}
}
# Export proxy agent bootstraps using the given certificates
# Nov 1st 2022
function Export-ProxyAgentBootstraps
{
<#
.SYNOPSIS
Export bootstraps of the given certificates.
.DESCRIPTION
Export boostraps of the given certificates. Uses the FQDN of the current computer as MachineName.
The filename of the bootstrap is same than the certificate with .xml extension
.Example
Export-AADIntProxyAgentBootstraps -Certificates PTA01.company.com_ea664074-37dd-4797-a676-b0cf6fdafcd4_4b6ffe82-bfe2-4357-814c-09da95399da7_A3457AEAE25D4C513BCF37CB138628772BE1B52.pfx
Bootstrap saved to: PTA01.company.com_ea664074-37dd-4797-a676-b0cf6fdafcd4_4b6ffe82-bfe2-4357-814c-09da95399da7_A3457AEAE25D4C513BCF37CB138628772BE1B52.xml
#>
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String[]]$Certificates
)
Process
{
foreach($fileName in $Certificates)
{
if(Test-Path $fileName)
{
try
{
$certificate = Load-Certificate -FileName $fileName -Exportable
# Sleep a sec to get the cert properly loaded
Start-Sleep -Seconds 1
$bootStrap = Get-BootstrapConfiguration -MachineName (Get-ComputerName -FQDN) -Certificate $certificate
if($bootstrap -eq $null)
{
Throw "Could not get bootstrap"
}
$bootStrapFileName = "$($fileName.Substring(0,$fileName.LastIndexOf(".")-1)).xml"
Set-Content $bootStrapFileName -Value $bootStrap
Write-Host "Bootstrap saved to: $bootStrapFileName"
}
catch
{
Write-Warning "Could not get bootstrap for $fileName"
}
}
}
}
}