PSTcpIp.psm1
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using namespace System 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 Destination { 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.Security.Cryptography.X509Certificates; namespace PSTcpIp { public class TlsSslStatus { public string HostName { 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 NegotiatedCipherSuite { get; set; } public string CipherAlgorithm { 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 #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 remote computers. You can use the parameters of Test-TcpConnection to specify the receiving computers and to set the number of connection requests. Unlike the traditional ping command, Test-TcpConnection returns a PSObject that you can investigate in Windows PowerShell, but you can use the Quiet parameter to force it to return only a Boolean value. Unlike Test-Connection, Test-TcpConnection does not depend on ICMP echo requests to determine if connectivity can be established. This is particularly useful in cases where firewalls block ICMP but allow access to HTTP and SSL. .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 .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 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) } 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.Destination = $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-SslCertificate { <# .SYNOPSIS Gets an SSL certificate from an endpoint. .DESCRIPTION Gets an SSL certificate from an endpoint specified as a host name and port or URI. .PARAMETER HostName The target host to obtain an SSL 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 SSL certificate is sent. This parameter supports HTTPS only. .PARAMETER TlsVersion Specifies the TLS version for the target endpoint. Works with both the HostName and Uri parameters. Default value is Tls12. .EXAMPLE Get-SslCertificate -HostName www.mysite.com Gets an SSL certificate from www.mysite.com over port 443 (default). .EXAMPLE Get-SslCertificate -HostName www.mysite.com -Port 8181 Gets an SSL certificate from www.mysite.com over port 8181. .EXAMPLE Get-SslCertificate -HostName www.mysite.com -Port 443 | Select Thumbprint, Subject, NotAfter | Format-List Gets an SSL certificate from www.mysite.com over port 443, selects three properties (Thumprint, Subject, NotAfter) and formats the output as a list. .EXAMPLE Get-SslCertificate -Uri https://www.mysite.com/default.htm | Select Thumbprint, Subject, NotAfter | Format-List Gets an SSL certificate from https://www.mysite.com, selects three properties (Thumprint, Subject, NotAfter) and formats the output as a list. .OUTPUTS System.Security.Cryptography.X509Certificates.X509Certificate2 .LINK Select-Object Format-List https://github.com/anthonyg-1/PSTcpIp #> [CmdletBinding()] [OutputType([System.Security.Cryptography.X509Certificates.X509Certificate2])] param( [Parameter(Mandatory = $false, Position = 0, ParameterSetName = "HostName")][ValidateLength(1, 250)][Alias('ComputerName', 'IPAddress', 'Name', 'h', 'i')][String]$HostName, [Parameter(Mandatory = $false, Position = 1, ParameterSetName = "HostName")][ValidateRange(1, 65535)][Alias('PortNumber', 'p')][Int]$Port = 443, [Parameter(Mandatory = $false, Position = 0, ParameterSetName = "Uri")][Uri]$Uri, [Parameter(Mandatory = $false, Position = 2)][ValidateSet("Tls", "Tls11", "Tls12", "Tls13")][String]$TlsVersion = "Tls12" ) PROCESS { [string]$targetHost = "" [string]$targetPort = "" if ($PSBoundParameters.ContainsKey("Uri")) { $targetHost = $Uri.Authority $targetPort = $Uri.Port } else { $targetHost = $HostName $targetPort = $Port } $connectionTestResult = Test-TcpConnection -DNSHostName $targetHost -Port $targetPort [bool]$isIp = $false try { [System.Net.IPAddress]::Parse($targetHost) | Out-Null $isIp = $true } catch { $isIp = $false } if ($isIp) { $targetHost = $connectionTestResult.Destination } if ($null -eq $targetHost) { $webExceptionMessage = "Host not specified. Unable to connect." $WebException = New-Object -TypeName System.Net.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 System.Net.WebException -ArgumentList $webExceptionMessage Write-Error -Exception $WebException -Category ConnectionError -ErrorAction Stop } [X509Certificate2]$sslCert = $null try { $tcpClient = [TcpClient]::new($targetHost, $Port) $sslStream = [SslStream]::new($tcpClient.GetStream()) $sslStream.AuthenticateAsClient($targetHost) $sslCert = [X509Certificate2]::new($sslStream.RemoteCertificate) $sslStream.Close() $sslStream.Dispose() $tcpClient.Close() $tcpClient.Dispose() } catch { $cryptographicExceptionMessage = "Unable to establish SSL session with: {0}." -f $targetHost $CryptographicException = New-Object -TypeName System.Security.Cryptography.CryptographicException -ArgumentList $cryptographicExceptionMessage Write-Error -Exception $CryptographicException -Category SecurityError -ErrorAction Stop } return $sslCert } } function Get-TlsStatus { <# .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 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-TlsStatus -HostName mysite.com -Port 443 Obtains TLS settings on mysite.com against TCP port 443. .EXAMPLE Get-TlsStatus -Uri "https://www.mysite.com" Tests TLS settings on "https://www.mysite.com". .OUTPUTS PSTcpIp.TlsSslStatus This function returns a TlsSslStatus object. Example output against www.microsoft.com: HostName : www.microsoft.com Port : 443 SerialNumber : 6B000003F4E3A67A2348550C330000000003F4 Thumbprint : 9B2B8AE65169AA477C5783D6480F296EF48CF14D Subject : CN=www.microsoft.com, OU=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=WA, C=US Issuer : CN=Microsoft RSA TLS CA 01, O=Microsoft Corporation, C=US CertificateVerifies : True ValidFrom : 8/28/2020 6:17:02 PM ValidTo : 8/28/2021 6:17:02 PM SignatureAlgorithm : sha256RSA NegotiatedCipherSuite : TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 CipherAlgorithm : Aes256 Ssl2 : False Ssl3 : False Tls : True Tls11 : True Tls12 : True Tls13 : False .NOTES Requires PowerShell 7 and above to obtain cipher information. #> [CmdletBinding()] param ( [Parameter(Mandatory = $false, Position = 0, ParameterSetName = "HostName")][ValidateLength(1, 250)][Alias('ComputerName', 'IPAddress', 'Name', 'h', 'i')][String]$HostName, [Parameter(Mandatory = $false, Position = 1, ParameterSetName = "HostName")][ValidateRange(1, 65535)][Alias('PortNumber', 'p')][Int]$Port = 443, [Parameter(Mandatory = $false, Position = 0, ParameterSetName = "Uri")][Uri]$Uri ) PROCESS { [string]$targetHost = "" [string]$targetPort = "" if ($PSBoundParameters.ContainsKey("Uri")) { $targetHost = $Uri.Authority $targetPort = $Uri.Port } else { $targetHost = $HostName $targetPort = $Port } $connectionTestResult = Test-TcpConnection -DNSHostName $targetHost -Port $targetPort [bool]$isIp = $false try { [System.Net.IPAddress]::Parse($targetHost) | Out-Null $isIp = $true } catch { $isIp = $false } if ($isIp) { $targetHost = $connectionTestResult.Destination } if ($null -eq $targetHost) { $webExceptionMessage = "Host not specified. Unable to connect." $WebException = New-Object -TypeName System.Net.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 System.Net.WebException -ArgumentList $webExceptionMessage Write-Error -Exception $WebException -Category ConnectionError -ErrorAction Stop } $tlsStatus = New-Object -TypeName PSTcpIp.TlsSslStatus $tlsStatus.HostName = $targetHost $tlsStatus.Port = $targetPort [X509Certificate2]$sslCert = $null; [bool]$handshakeSucceeded = $false; try { $sslCert = Get-SslCertificate -HostName $targetHost -Port $targetPort -ErrorAction Stop $tlsStatus.CertificateVerifies = $sslCert.Verify() $tlsStatus.ValidFrom = $sslCert.NotBefore; $tlsStatus.ValidTo = $sslCert.NotAfter; $tlsStatus.SerialNumber = $sslCert.GetSerialNumberString() $tlsStatus.Thumbprint = $sslCert.Thumbprint $tlsStatus.Subject = $sslCert.Subject $tlsStatus.Issuer = $sslCert.Issuer $handshakeSucceeded = $true } catch { $cryptographicExceptionMessage = "Unable to establish SSL handshake with the following host: {0}" -f $targetHost $CryptographicException = New-Object -TypeName System.Security.Cryptography.CryptographicException -ArgumentList $cryptographicExceptionMessage Write-Error -Exception $CryptographicException -Category ProtocolError -ErrorAction Stop } If ($handshakeSucceeded) { foreach ($protocol in $protocolList) { $socket = New-Object -TypeName System.Net.Sockets.Socket -ArgumentList ([System.Net.Sockets.SocketType]::Stream, [System.Net.Sockets.ProtocolType]::Tcp) $socket.Connect($targetHost, $targetPort) try { $netStream = New-Object -TypeName System.Net.Sockets.NetworkStream -ArgumentList $socket, $true $sslStream = New-Object -TypeName System.Net.Security.SslStream -ArgumentList $netStream, $true $sslStream.AuthenticateAsClient($targetHost, $null, $protocol, $false) $tlsStatus.SignatureAlgorithm = $sslCert.SignatureAlgorithm.FriendlyName $tlsStatus.$protocol = $true $tlsStatus.NegotiatedCipherSuite = $sslStream.NegotiatedCipherSuite $tlsStatus.CipherAlgorithm = $sslStream.CipherAlgorithm } catch { $tlsStatus.$protocol = $false } finally { if ($sslStream) { $sslStream.Close() $sslStream.Dispose() } if ($socket) { $socket.Close() $socket.Dispose() } } } } return $tlsStatus } } #endregion Export-ModuleMember -Function Test-TcpConnection Export-ModuleMember -Function Get-SslCertificate Export-ModuleMember -Function Get-TlsStatus New-Alias -Name ttc -Value Test-TcpConnection -Force New-Alias -Name gssl -Value Get-SslCertificate -Force New-Alias -Name Get-TlsCertificate -Value Get-SslCertificate -Force New-Alias -Name Get-TlsInfo -Value Get-TlsStatus -Force New-Alias -Name gtlss -Value Get-TlsStatus -Force Export-ModuleMember -Alias ttc Export-ModuleMember -Alias gssl Export-ModuleMember -Alias Get-TlsCertificate Export-ModuleMember -Alias gtlss Export-ModuleMember -Alias Get-TlsInfo |