PoshSSH/PoshSSH/NewSSHSession.cs
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using Renci.SshNet; using Renci.SshNet.Common; using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Management.Automation; using System.Management.Automation.Host; using System.Text; namespace SSH { /// <summary> /// /// </summary> [Cmdlet(VerbsCommon.New, "SSHSession", DefaultParameterSetName = "NoKey")] public class NewSshSession : PSCmdlet { // Hosts to conect to [ValidateNotNullOrEmpty] [Parameter(Mandatory = true, ValueFromPipelineByPropertyName = true, Position = 0, ParameterSetName = "NoKey")] [Parameter(Mandatory = true, ValueFromPipelineByPropertyName = true, Position = 0, ParameterSetName = "Key")] [Alias("HostName", "Computer", "IPAddress", "Host")] public string[] ComputerName { get { return _computername; } set { _computername = value; } } private string[] _computername; // Credentials for Connection [ValidateNotNullOrEmpty] [Parameter(Mandatory = true, ValueFromPipelineByPropertyName = true, Position = 1, ParameterSetName = "NoKey")] [Parameter(Mandatory = true, ValueFromPipelineByPropertyName = true, Position = 1, ParameterSetName = "Key")] public PSCredential Credential { get { return _credential; } set { _credential = value; } } private PSCredential _credential; // Port for SSH private Int32 _port = 22; [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "NoKey")] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] public Int32 Port { get { return _port; } set { _port = value; } } //Proxy Server to use private String _proxyserver = ""; [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "NoKey")] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] public String ProxyServer { get { return _proxyserver; } set { _proxyserver = value; } } // Proxy Port private Int32 _proxyport = 8080; [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "NoKey")] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] public Int32 ProxyPort { get { return _proxyport; } set { _proxyport = value; } } // Proxy Credentials private PSCredential _proxycredential; [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "NoKey")] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] [ValidateNotNullOrEmpty] public PSCredential ProxyCredential { get { return _proxycredential; } set { _proxycredential = value; } } // Proxy Type private string _proxytype = "HTTP"; [ValidateSet("HTTP", "Socks4", "Socks5", IgnoreCase = true)] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "NoKey")] public string ProxyType { get { return _proxytype; } set { _proxytype = value; } } //SSH Key File private String _keyfile = ""; [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] public String KeyFile { get { return _keyfile; } set { _keyfile = value; } } // ConnectionTimeout Parameter private int _connectiontimeout = 10; [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "NoKey")] public int ConnectionTimeout { get { return _connectiontimeout; } set { _connectiontimeout = value; } } // KeepAliveInterval Parameter private int _keepaliveinterval = 10; [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "NoKey")] public int KeepAliveInterval { get { return _keepaliveinterval; } set { _keepaliveinterval = value; } } // Auto Accept key fingerprint private bool _acceptkey; [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "Key")] [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, ParameterSetName = "NoKey")] public SwitchParameter AcceptKey { get { return _acceptkey; } set { _acceptkey = value; } } // Variable to hold the host/fingerprint information private Dictionary<string, string> _sshHostKeys; protected override void BeginProcessing() { // Collect host/fingerprint information from the registry. base.BeginProcessing(); var keymng = new TrustedKeyMng(); _sshHostKeys = keymng.GetKeys(); } protected override void ProcessRecord() { foreach (var computer in _computername) { ConnectionInfo connectInfo; if (_keyfile.Equals("")) { WriteVerbose("Using SSH Username and Password authentication for connection."); var kIconnectInfo = new KeyboardInteractiveAuthenticationMethod(_credential.GetNetworkCredential().UserName); connectInfo = ConnectionInfoGenerator.GetCredConnectionInfo(computer, _port, _credential, _proxyserver, _proxytype, _proxyport, _proxycredential, kIconnectInfo); // Event Handler for interactive Authentication kIconnectInfo.AuthenticationPrompt += delegate(object sender, AuthenticationPromptEventArgs e) { foreach (var prompt in e.Prompts) { if (prompt.Request.Contains("Password")) prompt.Response = _credential.GetNetworkCredential().Password; } }; } else { WriteVerbose("Using SSH Key authentication for connection."); connectInfo = ConnectionInfoGenerator.GetKeyConnectionInfo(computer, _port, _keyfile, _credential, _proxyserver, _proxytype, _proxyport, _proxycredential); } //Ceate instance of SSH Client with connection info var client = new SshClient(connectInfo); // Handle host key var computer1 = computer; client.HostKeyReceived += delegate(object sender, HostKeyEventArgs e) { var sb = new StringBuilder(); foreach (var b in e.FingerPrint) { sb.AppendFormat("{0:x}:", b); } var fingerPrint = sb.ToString().Remove(sb.ToString().Length - 1); if (MyInvocation.BoundParameters.ContainsKey("Verbose")) { Host.UI.WriteVerboseLine("Fingerprint for " + computer1 + ": " + fingerPrint); } if (_sshHostKeys.ContainsKey(computer1)) { if (_sshHostKeys[computer1] == fingerPrint) { if (MyInvocation.BoundParameters.ContainsKey("Verbose")) { Host.UI.WriteVerboseLine("Fingerprint matched trusted fingerprint for host " + computer1); } e.CanTrust = true; } else { throw new System.Security.SecurityException("SSH fingerprint mismatch for host " + computer1); } } else { int choice; if (_acceptkey) { choice = 0; } else { var choices = new Collection<ChoiceDescription> { new ChoiceDescription("Y"), new ChoiceDescription("N") }; choice = Host.UI.PromptForChoice("Server SSH Fingerprint", "Do you want to trust the fingerprint " + fingerPrint, choices, 1); } if (choice == 0) { var keymng = new TrustedKeyMng(); keymng.SetKey(computer1, fingerPrint); e.CanTrust = true; } else { e.CanTrust = false; } } }; // Set the connection timeout client.ConnectionInfo.Timeout = TimeSpan.FromSeconds(_connectiontimeout); // Set Keepalive for connections client.KeepAliveInterval = TimeSpan.FromSeconds(_keepaliveinterval); // Connect to host using Connection info client.Connect(); WriteObject(SshModHelper.AddToSshSessionCollection(client, SessionState), true); } } // End process record } //end of the class for the New-SSHSession //################################################### } |