PSTcpIp.psm1
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using namespace System using namespace System.Collections using namespace System.Net using namespace System.Net.Sockets using namespace System.Net.Security using namespace System.Security.Authentication using namespace System.Security.Cryptography using namespace System.Security.Cryptography.X509Certificates #Requires -Version 7 #region Load format file $formatFilePath = Join-Path -Path $PSScriptRoot -ChildPath 'TcpConnectionStatus.Format.PS1Xml' if (Test-Path -Path $PSScriptRoot) { Update-FormatData -PrependPath $formatFilePath } #endregion #region Load config data $tcpPortsJsonFilePath = Join-Path -Path $PSScriptRoot -ChildPath 'ConfigData\TcpPorts.json' $protocolsJsonFilePath = Join-Path -Path $PSScriptRoot -ChildPath 'ConfigData\Protocols.json' if (-not(Test-Path -Path $tcpPortsJsonFilePath )) { $FileNotFoundException = New-Object -TypeName System.IO.FileNotFoundException -ArgumentList ("JSON configuration file not found in the following path: {0}" -f $tcpPortsJsonFilePath ) throw $FileNotFoundException } if (-not(Test-Path -Path $protocolsJsonFilePath )) { $FileNotFoundException = New-Object -TypeName System.IO.FileNotFoundException -ArgumentList ("JSON configuration file not found in the following path: {0}" -f $protocolsJsonFilePath) throw $FileNotFoundException } $tcpPortData = Get-Content -Path $tcpPortsJsonFilePath -Raw | ConvertFrom-Json $protocolData = Get-Content -Path $protocolsJsonFilePath -Raw | ConvertFrom-Json $portTable = @{ } foreach ($entry in $tcpPortData) { if (-not($portTable.ContainsKey([int]$entry.Port))) { $portTable.Add([int]$entry.port, $entry.description) } } $protocolArray = $protocolData | Select-Object -ExpandProperty protocols New-Variable -Name tcpPortAndDescriptionData -Value $portTable -Option ReadOnly -Scope Global -Force New-Variable -Name protocolList -Value $protocolArray -Option ReadOnly -Scope Global -Force #endregion #region Class Definitions $tcpConnectionStatusClassDef = @" using System; using System.Net; namespace PSTcpIp { public class TcpConnectionStatus { public string HostName { get; set; } public string IPAddress { get; set; } public Int32 Port { get; set; } public string Service { get; set; } public bool Connected { get; set; } public bool HostNameResolved { get; set; } } } "@ $tlsStatusDefinition = @" using System; using System.Net; using System.Security.Cryptography.X509Certificates; namespace PSTcpIp { public class TlsInfo { public string HostName { get; set; } public IPAddress IPAddress { get; set; } public int Port { get; set; } public string SerialNumber { get; set; } public string Thumbprint { get; set; } public string Subject { get; set; } public string Issuer { get; set; } public DateTime ValidFrom { get; set; } public DateTime ValidTo { get; set; } public bool CertificateVerifies { get; set; } public string SignatureAlgorithm { get; set; } public string[] NegotiatedCipherSuites { get; set; } public string CipherAlgorithm { get; set; } public string CipherStrength { get; set; } public string KeyExchangeAlgorithm { get; set; } public string StrictTransportSecurity { get; set; } public string[] SubjectAlternativeNames { get; set; } public bool Ssl2 { get; set; } public bool Ssl3 { get; set; } public bool Tls { get; set; } public bool Tls11 { get; set; } public bool Tls12 { get; set; } public bool Tls13 { get; set; } } } "@ Add-Type -TypeDefinition $tcpConnectionStatusClassDef -ReferencedAssemblies System.Net.Primitives -ErrorAction Stop Add-Type -TypeDefinition $tlsStatusDefinition -ErrorAction Stop #endregion #region Private Functions function Get-WebServerCertificate([string]$TargetHost, [int]$Port = 443) { [X509Certificate2]$sslCert = $null try { $tcpClient = [TcpClient]::new($TargetHost, $Port) $callback = { param($certSender, $cert, $chain, $errors) return $true } $sslStream = [SslStream]::new($tcpClient.GetStream(), $false, $callback) $sslStream.AuthenticateAsClient($TargetHost) $sslCert = [X509Certificate2]::new($sslStream.RemoteCertificate) $sslStream.Close() $sslStream.Dispose() $tcpClient.Close() $tcpClient.Dispose() } catch { $cryptographicExceptionMessage = "Unable to establish TLS session with the following host: {0}." -f $targetHost $CryptographicException = New-Object -TypeName CryptographicException -ArgumentList $cryptographicExceptionMessage throw $CryptographicException } return $sslCert } #endregion #region Exported Functions function Test-TcpConnection { <# .SYNOPSIS Tests TCP connectivity to a remote computer. .DESCRIPTION The Test-TcpConnection function attempts to establish TCP connectivity to one or more target hosts. .PARAMETER DNSHostName The target hostname to test TCP connectivity against. .PARAMETER Port The TCP port to test. .PARAMETER Count The amount of iterations. Default is 1. .PARAMETER Timeout The timeout value expressed in milliseconds. The default value is 1200. .PARAMETER Quiet Returns a boolean result only. .EXAMPLE Test-TcpConnection -DNSHostName 'myserver' -Port 80 Tests HTTP connectivity on the server 'myserver'. .EXAMPLE Test-TcpConnection -ComputerName 'mydomaincontroller' -Port 389 -Quiet Tests LDAP connectivity on the server 'mydomaincontroller' using the parameter alias ComputerName with a boolean return value. .EXAMPLE Test-TcpConnection -DNSHostName 'mywebserver' -Port 443 -Count 12 Tests SSL connectivity on the server 'mywebserver' twelve times as opposed to the default four attempts. .EXAMPLE Test-TcpConnection -IPAddress 134.170.184.133 -Port 80 Tests HTTP connectivity to a host with an IPV4 address of 134.170.184.133. .EXAMPLE @((80..445), (5000..6000)) | % { $ports += $_ } Test-TcpConnection -ComputerName 'mywebserver' -Port $ports -Count 1 -Timeout 100 Scans 'mywebserver' for TCP ports 80 through 445, and 5000 through 6000 with a 100 millisecond timeout. .EXAMPLE Test-TcpConnection -DNSHostName 'myserver' Tests TCP connectivity on the server 'myserver' against the following ports: 20, 21, 22, 23, 25, 53, 80, 88, 139, 389, 443, 445, 636, 3389, 5985 .EXAMPLE Test-TcpConnection -HostName mywebsite.org | Where Connected Determine the listening TCP ports on mywebsite.org. .EXAMPLE #requires -Module ActiveDirectory Get-ADComputer -Filter {OperatingSystem -like "*2019*"} | Test-TcpConnection -Port 443 -Timeout 100 | Where Connected GetS all Windows Server 2019 instances from Active Directory and determine which ones are listening on port 443. .EXAMPLE #requires -Module ActiveDirectory Get-ADDomainController -Filter * | Test-TcpConnection -Port 636 | Where Connected | Get-TlsCertificate | Select Subject, NotAfter Get an expiration report of LDAPS certificates from Active Directory domain controllers. .INPUTS System.String A string value received by the the DNSHostName parameter. This is the hostname of the computer that you wish to test TCP connectivity against. This parameter is also accessible by the aliases ComputerName, HostName, and IPAddress. System.Int32 An integer value received by the the Port parameter. .OUTPUTS PSTcpIp.TcpConnectionStatus, System.Boolean By default this cmdlet returns a TcpConnectionStatus object. When you use the Quiet parameter, it returns a Boolean. .LINK Where-Object https://github.com/anthonyg-1/PSTcpIp #> [CmdletBinding(DefaultParameterSetName = 'Default')] [Alias('ttc')] [OutputType([PSTcpIp.TcpConnectionStatus], ParameterSetName = 'Default')] [OutputType([System.Boolean], ParameterSetName = 'Quiet')] param( [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Position = 0)][ValidateLength(1, 250)][Alias('ComputerName', 'HostName', 'IPAddress', 'Name', 'h', 'i')][String[]]$DNSHostName, [Parameter(Mandatory = $false, ValueFromPipeline = $false, Position = 1)][ValidateRange(1, 65535)][Alias('PortNumber', 'p')][Int[]]$Port, [Parameter(Mandatory = $false, ParameterSetName = 'Default', Position = 2)][ValidateRange(1, 100000)][Alias('c')][Int]$Count = 1, [Parameter(Mandatory = $true, ParameterSetName = 'Quiet', Position = 2)][Alias('q')][Switch]$Quiet, [Parameter(Mandatory = $false, Position = 3)][ValidateRange(1, 2500)][Alias('to')][Int]$Timeout = 1200 ) BEGIN { New-Variable -Name ipv4Addresses -Value $null -Force New-Variable -Name ipv4Address -Value $null -Force New-Variable -Name tcpClient -Value $null -Force $commonPorts = @(20, 21, 22, 23, 25, 53, 80, 88, 139, 389, 443, 445, 636, 3389, 5985, 5986) } PROCESS { $__ComputerNames = $DNSHostName foreach ($__ComputerName in $__ComputerNames) { if ($Quiet) { $amountOfIterations = 1 } else { if ($Count -le 0) { $amountOfIterations = 1 } else { $amountOfIterations = $Count } } try { $destination = [System.Net.DNS]::GetHostEntry($__ComputerName) | Select-Object -ExpandProperty HostName } catch { $destination = $__ComputerName } [boolean]$nameResolved = $false try { $ipv4Addresses = @(([System.Net.Dns]::GetHostAddresses($__ComputerName)).IPAddressToString) $ipv4Address = $ipv4Addresses[0] $nameResolved = $true } catch { $ipv4Address = 'Unable to resolve hostname' $nameResolved = $false } for ($i = 1; $i -le $amountOfIterations; $i++) { [boolean]$connectionSucceeded = $false if (-not($PSBoundParameters.ContainsKey("Port"))) { $__PortNumbers = $commonPorts } else { $__PortNumbers = $Port } $__PortNumbers | ForEach-Object { $__PortNumber = $PSItem if ($nameResolved) { $tcpClient = New-Object -TypeName System.Net.Sockets.TcpClient try { ($tcpClient.BeginConnect($ipv4Address, $__PortNumber, $null, $null).AsyncWaitHandle.WaitOne($Timeout)) | Out-Null if ($tcpClient.Connected -eq $true) { $connectionSucceeded = $true } else { $connectionSucceeded = $false } } catch { $connectionSucceeded = $false } finally { $tcpClient.Close() $tcpClient.Dispose() } } $connectionStatusObject = New-Object -TypeName PSTcpIp.TcpConnectionStatus $connectionStatusObject.HostName = $destination $connectionStatusObject.IPAddress = $ipv4Address $connectionStatusObject.Port = $__PortNumber $connectionStatusObject.Service = $tcpPortAndDescriptionData.Item($__PortNumber) $connectionStatusObject.Connected = $connectionSucceeded $connectionStatusObject.HostNameResolved = $nameResolved if ($Quiet) { return $connectionSucceeded } else { return $connectionStatusObject } } } } } END { Remove-Variable -Name tcpClient Remove-Variable -Name ipv4Address Remove-Variable -Name ipv4Addresses } } function Get-TlsCertificate { <# .SYNOPSIS Gets a TLS certificate from an endpoint. .DESCRIPTION Gets a TLS certificate from an endpoint specified as a host name and port or URI. .PARAMETER HostName The target host to obtain an TLS certificate from. .PARAMETER Port The port for the target host. This parameter is only applicable when using the HostName parameter. Default value is 443. .PARAMETER Uri Specifies the Uniform Resource Identifier (URI) of the internet resource to which the request for the TLS certificate is sent. This parameter supports HTTPS only. .PARAMETER IncludeChain Instructs the function to return the x509 certificate chain for the given certificate as a list starting with the end-entity certificate followed by one or more CA certificates. .EXAMPLE Get-TlsCertificate -HostName www.mysite.com Gets a TLS certificate from www.mysite.com over port 443 (default). .EXAMPLE Get-TlsCertificate -HostName www.mysite.com -Port 8181 Gets a TLS certificate from www.mysite.com over port 8181. .EXAMPLE Get-TlsCertificate -HostName www.mysite.com -Port 443 | Select Thumbprint, Subject, NotAfter | Format-List Gets a TLS certificate from www.mysite.com over port 443, selects three properties (Thumprint, Subject, NotAfter) and formats the output as a list. .EXAMPLE Get-TlsCertificate -Uri https://www.mysite.com/default.htm | Select Thumbprint, Subject, NotAfter | Format-List Gets a TLS certificate from https://www.mysite.com, selects three properties (Thumprint, Subject, NotAfter) and formats the output as a list. .EXAMPLE Get-TlsCertificate -HostName www.mysite.com -IncludeChain | Select Subject, Thumbprint, NotAfter | Format-List Gets a TLS certificate from https://www.mysite.com including the full certificate chain and writes the full chain's thumbprint, and expiration as a list to the console. .EXAMPLE $targets = "www.mywebsite1.com", "www.mywebsite2.com", "www.mywebsite3.com", "www.mywebsite4.com" $targets | Test-TcpConnection -Port 443 | Where Connected | Get-TlsCertificate | Select Subject, NotAfter | Format-List Attempts to connect to an array of hostnames on TCP port 443 and if the target host is listening obtain the TLS certificate, select the subject and expiration, and output the results as a list. .INPUTS System.String A string value is received by the HostName parameter .OUTPUTS System.Security.Cryptography.X509Certificates.X509Certificate2 .LINK Test-TcpConnection Select-Object Format-List https://github.com/anthonyg-1/PSTcpIp #> [CmdletBinding()] [OutputType([System.Security.Cryptography.X509Certificates.X509Certificate2])] param( [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Position = 0, ParameterSetName = "HostName")][ValidateLength(1, 250)][Alias('ComputerName', 'IPAddress', 'Name', 'h', 'i')][String]$HostName, [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true, Position = 1, ParameterSetName = "HostName")][ValidateRange(1, 65535)][Alias('PortNumber', 'p')][Int]$Port = 443, [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true, Position = 0, ParameterSetName = "Uri")][Uri]$Uri, [Parameter(Mandatory = $false, Position = 2)][Switch]$IncludeChain ) PROCESS { [string]$targetHost = "" [string]$targetPort = "" if ($PSBoundParameters.ContainsKey("Uri")) { if ($Uri -like "https://*") { $targetHost = $Uri.Authority $targetPort = $Uri.Port } else { $argumentExceptionMessage = "Provided URI is not does not contain the necessary https:// prefix." $ArgumentException = New-Object ArgumentException -ArgumentList $argumentExceptionMessage Write-Error -Exception $ArgumentException -Category InvalidArgument -ErrorAction Stop } } else { $targetHost = $HostName $targetPort = $Port } $connectionTestResult = Test-TcpConnection -DNSHostName $targetHost -Port $targetPort [bool]$isIp = $false try { [IPAddress]::Parse($targetHost) | Out-Null $isIp = $true } catch { $isIp = $false } if ($isIp) { $targetHost = $connectionTestResult.HostName } if ($null -eq $targetHost) { $webExceptionMessage = "Host not specified. Unable to connect." $WebException = New-Object -TypeName WebException -ArgumentList $webExceptionMessage Write-Error -Exception $WebException -Category ConnectionError -ErrorAction Stop } if (-not($connectionTestResult.Connected)) { $webExceptionMessage = "Unable to connect to {0} over the following port: {1}" -f $targetHost, $targetPort $WebException = New-Object -TypeName WebException -ArgumentList $webExceptionMessage Write-Error -Exception $WebException -Category ConnectionError -ErrorAction Stop } [X509Certificate2]$sslCert = $null [bool]$handshakeSucceeded = $false try { $sslCert = Get-WebServerCertificate -TargetHost $targetHost -Port $Port $handshakeSucceeded = $true } catch { $cryptographicExceptionMessage = $_.Exception.Message $CryptographicException = New-Object -TypeName CryptographicException -ArgumentList $cryptographicExceptionMessage Write-Error -Exception $CryptographicException -Category SecurityError -ErrorAction Continue } if ($handshakeSucceeded) { if ($PSBoundParameters.ContainsKey("IncludeChain")) { $chain = [X509Chain]::new() $chain.Build($sslCert) | Out-Null $allCertsInChain = $chain.ChainElements | Select-Object -ExpandProperty Certificate return $allCertsInChain } else { return $sslCert } } } } function Get-TlsInformation { <# .SYNOPSIS Gets TLS protocols, certificate and cipher information against a remote computer running TLS/SSL. .DESCRIPTION Obtains the negotiated TLS protocols, certificate data (lifetime, validity, subject, serial number, subject alternative names, and other identifiable information, etc.) and cipher information against a remote target running TLS/SSL. .PARAMETER HostName The target host to get TLS/SSL settings from. .PARAMETER Port The port for the target host. This parameter is only applicable when using the HostName parameter. Default value is 443. .PARAMETER Uri Specifies the Uniform Resource Identifier (URI) of the internet resource as an alternative to the HostName and Port parameters. This parameter supports HTTPS only. .EXAMPLE Get-TlsInformation -HostName mysite.com -Port 443 Obtains TLS settings on mysite.com against TCP port 443. .EXAMPLE Get-TlsInformation -Uri "https://www.mysite.com" Tests TLS settings on "https://www.mysite.com". .EXAMPLE $targets = "www.mywebsite1.com", "www.mywebsite2.com", "www.mywebsite3.com", "www.mywebsite4.com" $targets | Test-TcpConnection -Port 443 | Where Connected | Get-TlsInformation Attempts to connect to an array of hostnames on TCP port 443 and if the target host is listening obtain TLS information for the target. .EXAMPLE Get-TlsStatus -HostName www.mysite.com | Select -Expand SubjectAlternativeNames Obtain a list of SANs (Subject Alternative Names) from ww.mysite.com. .INPUTS System.String A string value is received by the HostName parameter .OUTPUTS PSTcpIp.TlsInfo This function returns a TlsInfo object. Example output against "https://www.microsoft.com/en-us" using the Uri parameter: HostName : www.microsoft.com IPAddress : 23.33.242.16 Port : 443 SerialNumber : 330059F8B6DA8689706FFA1BD900000059F8B6 Thumbprint : 2D6E2AE5B36F22076A197D50009DEE66396AA99C Subject : CN=www.microsoft.com, O=Microsoft Corporation, L=Redmond, S=WA, C=US Issuer : CN=Microsoft Azure TLS Issuing CA 06, O=Microsoft Corporation, C=US ValidFrom : 10/4/2022 7:23:11 PM ValidTo : 9/29/2023 7:23:11 PM CertificateVerifies : True SignatureAlgorithm : sha384RSA NegotiatedCipherSuites : {TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_AES_256_GCM_SHA384} CipherAlgorithm : Aes256 CipherStrength : 256 KeyExchangeAlgorithm : DiffieHellman StrictTransportSecurity : Strict-Transport-Security not found in header SubjectAlternativeNames : {wwwqa.microsoft.com, www.microsoft.com, staticview.microsoft.com, i.s-microsoft.com…} Ssl2 : False Ssl3 : False Tls : False Tls11 : False Tls12 : True Tls13 : True .NOTES If StrictTransportSecurity returns "Unable to acquire HSTS value" or "No value specified for strict transport security (HSTS)" with the HostName parameter set, try the fully qualified web address with the Uri parameter. .LINK Test-TcpConnection Select-Object Format-List https://github.com/anthonyg-1/PSTcpIp #> [CmdletBinding()] [OutputType([PSTcpIp.TlsInfo])] param ( [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Position = 0, ParameterSetName = "HostName")][ValidateLength(1, 250)][Alias('ComputerName', 'IPAddress', 'Name', 'h', 'i')][String]$HostName, [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true, Position = 1, ParameterSetName = "HostName")][ValidateRange(1, 65535)][Alias('PortNumber', 'p')][Int]$Port = 443, [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true, Position = 0, ParameterSetName = "Uri")][Uri]$Uri ) PROCESS { [string]$targetHost = "" [string]$targetPort = "" [string]$targetUri = "" if ($PSBoundParameters.ContainsKey("Uri")) { if ($Uri -like "https://*") { $targetHost = $Uri.Authority $targetPort = $Uri.Port $targetUri = $Uri } else { $argumentExceptionMessage = "Provided URI is not does not contain the necessary https:// prefix." $ArgumentException = New-Object ArgumentException -ArgumentList $argumentExceptionMessage Write-Error -Exception $ArgumentException -Category InvalidArgument -ErrorAction Stop } } else { $targetHost = $HostName $targetPort = $Port $targetUri = "https://{0}:{1}" -f $targetHost, $targetPort } $connectionTestResult = Test-TcpConnection -DNSHostName $targetHost -Port $targetPort [bool]$isIp = $false try { [IPAddress]::Parse($targetHost) | Out-Null $isIp = $true } catch { $isIp = $false } if ($isIp) { $targetHost = $connectionTestResult.HostName } if ($null -eq $targetHost) { $webExceptionMessage = "Host not specified. Unable to connect." $WebException = New-Object -TypeName WebException -ArgumentList $webExceptionMessage Write-Error -Exception $WebException -Category ConnectionError -ErrorAction Stop } if (-not($connectionTestResult.Connected)) { $webExceptionMessage = "Unable to connect to {0} over the following port: {1}" -f $targetHost, $targetPort $WebException = New-Object -TypeName WebException -ArgumentList $webExceptionMessage Write-Error -Exception $WebException -Category ConnectionError -ErrorAction Stop } $tlsInfo = New-Object -TypeName PSTcpIp.TlsInfo $tlsInfo.HostName = $targetHost try { $tlsInfo.IPAddress = $connectionTestResult.IPAddress } catch { $tlsInfo.IPAddress = $null } $tlsInfo.Port = $targetPort [X509Certificate2]$sslCert = $null [bool]$handshakeSucceeded = $false try { $sslCert = Get-WebServerCertificate -TargetHost $targetHost -Port $targetPort -ErrorAction Stop $tlsInfo.CertificateVerifies = $sslCert.Verify() $tlsInfo.ValidFrom = $sslCert.NotBefore; $tlsInfo.ValidTo = $sslCert.NotAfter; $tlsInfo.SerialNumber = $sslCert.GetSerialNumberString() $tlsInfo.Thumbprint = $sslCert.Thumbprint $tlsInfo.Subject = $sslCert.Subject $tlsInfo.Issuer = $sslCert.Issuer $handshakeSucceeded = $true } catch { $cryptographicExceptionMessage = $_.Exception.Message $CryptographicException = New-Object -TypeName CryptographicException -ArgumentList $cryptographicExceptionMessage Write-Error -Exception $CryptographicException -Category SecurityError -ErrorAction Continue } if ($handshakeSucceeded) { # Get HTTP Strict Transport Security values: [string]$strictTransportSecurityValue = "No value specified for strict transport security (HSTS)" try { $webRequestResponse = Invoke-WebRequest -Uri $targetUri -MaximumRedirection 0 -SkipCertificateCheck -ErrorAction Stop [HashTable]$responseHeaders = $webRequestResponse.Headers $strictTransportSecurityValue = $responseHeaders['Strict-Transport-Security'] if ($strictTransportSecurityValue.Length -lt 1) { $strictTransportSecurityValue = "Strict-Transport-Security not found in header" } } catch { $strictTransportSecurityValue = "Unable to acquire HSTS value" } $tlsInfo.StrictTransportSecurity = $strictTransportSecurityValue # If OS is Windows, the X509Certificate2.Extensions property is populated and thus we can infer SANS from that. # Else, we default to openssl to obtain the list of SANs on the retrieved certificate: $sansList = @() if ($IsWindows) { # Get list of Subject Alternative Names: try { $sansList = ($sslCert.Extensions | Where-Object { $_.Oid.FriendlyName -eq "Subject Alternative Name" }).format($false).Split(",").Replace("DNS Name=", "").Trim() } catch { $sansList += "Subject alternative names not found on this certificate." } } else { $opensslFound = $null -ne (Get-Command -CommandType Application -Name "openssl" -ErrorAction SilentlyContinue) if ($opensslFound) { $sansList = (($sslCert.ExportCertificatePem() | openssl x509 -noout -text | Select-String -Pattern "DNS:") -split ",").Replace("DNS:", "").Trim() } else { $opensslNotFoundWarning = "The openssl binary was not found. SubjectAlternativeNames will not be populated." Write-Warning -Message $opensslNotFoundWarning } } $tlsInfo.SubjectAlternativeNames = $sansList $negotiatedCipherSuites = @() foreach ($protocol in $protocolList) { $socket = [Socket]::new([SocketType]::Stream, [ProtocolType]::Tcp) $socket.Connect($targetHost, $targetPort) try { $netStream = [NetworkStream]::new($socket, $true) $callback = { param($certSender, $cert, $chain, $errors) return $true } $sslStream = [SslStream]::new($netStream, $false, $callback) $sslStream.AuthenticateAsClient($targetHost, $null, $protocol, $false) $tlsInfo.SignatureAlgorithm = $sslCert.SignatureAlgorithm.FriendlyName $tlsInfo.$protocol = $true if ($negotiatedCipherSuites -notcontains $sslStream.NegotiatedCipherSuite) { $negotiatedCipherSuites += $sslStream.NegotiatedCipherSuite } if (-not($tlsInfo.CipherAlgorithm)) { $tlsInfo.CipherAlgorithm = $sslStream.CipherAlgorithm } if (-not($tlsInfo.CipherStrength)) { $tlsInfo.CipherStrength = $sslStream.CipherStrength } if (-not($tlsInfo.KeyExchangeAlgorithm)) { if ($sslStream.KeyExchangeAlgorithm.ToString() -eq "44550") { $tlsInfo.KeyExchangeAlgorithm = "ECDH Ephemeral" } else { $tlsInfo.KeyExchangeAlgorithm = $sslStream.KeyExchangeAlgorithm.ToString() } } } catch { $tlsInfo.$protocol = $false } finally { if ($sslStream) { $sslStream.Close() $sslStream.Dispose() } if ($socket) { $socket.Close() $socket.Dispose() } } } $tlsInfo.NegotiatedCipherSuites = $negotiatedCipherSuites return $tlsInfo } } } #endregion Export-ModuleMember -Function Test-TcpConnection Export-ModuleMember -Function Get-TlsCertificate Export-ModuleMember -Function Get-TlsInformation New-Alias -Name ttc -Value Test-TcpConnection -Force New-Alias -Name gtls -Value Get-TlsCertificate -Force New-Alias -Name gssl -Value Get-TlsCertificate -Force New-Alias -Name Get-SslCertificate -Value Get-TlsCertificate -Force New-Alias -Name Get-TlsStatus -Value Get-TlsInformation -Force New-Alias -Name Get-TlsInfo -Value Get-TlsInformation -Force New-Alias -Name gtlsi -Value Get-TlsInformation -Force New-Alias -Name gtlss -Value Get-TlsInformation -Force Export-ModuleMember -Alias ttc Export-ModuleMember -Alias gtls Export-ModuleMember -Alias gssl Export-ModuleMember -Alias Get-SslCertificate Export-ModuleMember -Alias Get-TlsStatus Export-ModuleMember -Alias gtlsi Export-ModuleMember -Alias gtlss |