Connect-VPN.ps1
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function Connect-AnyConnect() # {{{ { [CmdletBinding(DefaultParameterSetName='Credential')] [OutputType([PSCustomObject])] Param( [Parameter(Position=1, Mandatory=$true)] [Alias("Server")] [string] $ComputerName, [Parameter(Position=2, ParameterSetName='Credential', Mandatory=$true)] [System.Management.Automation.PSCredential] $Credential, [Parameter(Position=2, ParameterSetName='Plain', Mandatory=$true)] [Alias("Username")] [string] $User, [Parameter(Position=3, ParameterSetName='Plain', Mandatory=$true)] [string] $Password, [Parameter(Position=4, Mandatory=$false)] [switch] $AcceptNotice ) if ($PSCmdlet.ParameterSetName -eq 'Credential') { Write-Verbose "Loading PSCredentials" $User = $Credential.UserName $Password = $Credential.GetNetworkCredential().password } else { $secret = ConvertTo-SecureString $Password -AsPlainText -Force $Credential = New-Object System.Management.Automation.PSCredential($User, $secret) $secret = $null } # Disconnect as needed $temp_session = [PSCustomObject] @{ Provider='AnyConnect'; ComputerName=$ComputerName; Credential=$Credential; } if ((Get-AnyConnectStatus -VPNSession $temp_session -Verbose:$false) -ne 'Disconnected') { Disconnect-AnyConnect -VPNSession $temp_session -Verbose:$Verbose } # First Stop any VPN cli and ui # There must be only one "client" running when connecting Get-Process | Where ProcessName -match 'vpn(ui|cli)' | ForEach { if (! $_.HasExited) { Write-Verbose "Stopping process $($_.Name) (pid: $($_.Id))" Stop-Process $_.Id } else { Write-Verbose "Process $($_.Name) is exiting (pid: $($_.Id))" } } Write-Debug "Starting AnyConnect to $ComputerName as $User (Password: $Password)" Write-Verbose "Starting the AnyConnect cli" $vpncli = New-Object System.Diagnostics.Process $vpncli.StartInfo = New-Object System.Diagnostics.ProcessStartInfo(Get-AnyConnect) $vpncli.StartInfo.Arguments = "-s" $vpncli.StartInfo.CreateNoWindow = $true $vpncli.StartInfo.UseShellExecute = $false $vpncli.StartInfo.RedirectStandardInput = $true $vpncli.StartInfo.RedirectStandardOutput = $true #$vpncli.StartInfo.RedirectStandardError = $true if (! $vpncli.Start()) { Throw "Cannot start AnyConnect Client, error: $LASTEXITCODE" } Write-Verbose "Waiting for process to be ready" Start-Sleep 2 Write-Verbose "Sending connect" $vpncli.StandardInput.WriteLine('connect ' + """$ComputerName""") Write-Verbose "Sending user" $vpncli.StandardInput.WriteLine($User) Write-Verbose "Sending password" $vpncli.StandardInput.WriteLine($Password) If ( $AcceptNotice ) { Write-Verbose "Accepting notice" $vpncli.StandardInput.WriteLine("y") } Write-Verbose "Reading its output stream" $found = $false for ($output = $vpncli.StandardOutput.ReadLine(); $output -ne $null; $output = $vpncli.StandardOutput.ReadLine()) { Write-Debug $output if ($output -eq ' >> Login failed.') { Throw [System.Security.Authentication.InvalidCredentialException] } elseif ($output -match ' >> note: (.*)') { Write-Warning $matches[1] } elseif ($output -match ' >> state: (.*)') { $state = $matches[1] Write-Verbose $state if ($state -eq 'Connected') { break } } } Start-Process -FilePath (Get-Anyconnect -gui) return [PSCustomObject] @{ Provider='AnyConnect'; ComputerName=$ComputerName; Credential=$Credential; } } #}}} <# .SYNOPSIS Connects to a VPN Provider. .DESCRIPTION Connects this computer to a given VPN Provider. .NOTES Only Cisco AnyConnect VPNs are supported as of now. .PARAMETER Provider The VPN Provider to use. One of: AnyConnect .PARAMETER ComputerName The ComputerName or VPN profile to use. The TAB completion will provide the list of possible values depending on the chosen Provider. .PARAMETER Credential The PSCredential to use. .PARAMETER User If no PSCredential is provided, a User and a (plain text) Password must be provided. .PARAMETER Password If no PSCredential is provided, a User and a (plain text) Password must be provided. .PARAMETER AcceptNotice Accept notice from the server, like a banner message. .INPUTS The ComputerName can be piped in. .OUTPUTS System.Management.Automation.PSObject Represents the VPN connection (its Provider, the ComputerName, and the Credential). .LINK https://github.com/gildas/posh-vpn .EXAMPLE $session = Connect-VPN -Provider AnyConnect -ComputerName vpn.acme.com -Credentials (Get-Credential ACME\gildas) Description ----------- Connects to a Cisco AnyConnect VPN at vpn.acme.com with the PSCredential entered via Get-Credential .EXAMPLE $session = Connect-VPN -Provider AnyConnect -ComputerName vpn.acme.com -User ACME\gildas -Password s3cr3t Description ----------- Connects to a Cisco AnyConnect VPN at vpn.acme.com with the clear text user and password #> function Connect-VPN # {{{ { [CmdletBinding(DefaultParameterSetName='Credential')] [OutputType([PSCustomObject])] Param( [Parameter(Position=1, Mandatory=$true)] [ValidateSet('AnyConnect')] [string] $Provider, #[Parameter(Position=2, Mandatory=$true)] #[Alias("Server")] #[string] $ComputerName, [Parameter(Position=3, ParameterSetName='Credential', Mandatory=$true)] [System.Management.Automation.PSCredential] $Credential, [Parameter(Position=3, ParameterSetName='Plain', Mandatory=$true)] [Alias("Username")] [string] $User, [Parameter(Position=4, ParameterSetName='Plain', Mandatory=$true)] [string] $Password, [Parameter(Position=5, Mandatory=$false)] [switch] $AcceptNotice ) DynamicParam { $parameters = New-Object -Type System.Management.Automation.RuntimeDefinedParameterDictionary #[Parameter(Position=2, Mandatory=$true)] $attributes = New-Object -Type System.Collections.ObjectModel.Collection[System.Attribute] $parameter_attribute = New-Object -Type System.Management.Automation.ParameterAttribute $parameter_attribute.Position = 2 $parameter_attribute.Mandatory = $true $parameter_attribute.ValueFromPipeline = $true #$parameter_attribute.ParameterSetName = @('Credential', 'Plain') $attributes.Add($parameter_attribute) if ($Provider -eq 'AnyConnect') { #[ValidateSet(Get-VPNProfiles -Provider AnyConnect)] $vpnProfiles = Get-VPNProfile -Provider AnyConnect if($vpnProfiles -gt 0) { $validateset = New-Object -Type System.Management.Automation.ValidateSetAttribute($vpnProfiles) $attributes.Add($validateset) } } #[Alias("Server")] $aliases = New-Object -Type System.Management.Automation.AliasAttribute(@('Server')) $attributes.Add($aliases) #[string] $ComputerName, $parameter = New-Object -Type System.Management.Automation.RuntimeDefinedParameter("ComputerName", [string], $attributes) $parameters.Add('ComputerName', $parameter) return $parameters } process { $PSBoundParameters.Remove('Provider') | Out-Null switch($Provider) { 'AnyConnect' { Connect-AnyConnect @PSBoundParameters } default { Throw "Unsupported VPN Provider: $Provider" } } } } # }}} |