Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

C# UWP/WinRT Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(C# UWP/WinRT) TCP or TLS over Multiple Hop SSH to Remote Server

Demonstrates how to use the Chilkat Socket API to connect to a remote server (using TCP or TLS) tunneled through mulitple-hop SSH. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2 => DestinationServer

The ConnectThroughSsh and UseSsh methods are added in Chilkat version 9.5.0.55 to accomplish this task.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Ssh ssh1 = new Chilkat.Ssh();

// Connect directly to the 1st SSH server.
bool success = await ssh1.ConnectAsync("serverssh1.com",22);
if (success != true) {
    Debug.WriteLine(ssh1.LastErrorText);
    return;
}

// Authenticate using login/password:
success = await ssh1.AuthenticatePwAsync("ssh1Login","ssh1Password");
if (success != true) {
    Debug.WriteLine(ssh1.LastErrorText);
    return;
}

// Connect through the 1st SSH connection to reach a 2nd SSH server.
// Note: Any number of SSH connections may be simultaneously tunneled through a single
// existing SSH connection.
Chilkat.Ssh ssh2 = new Chilkat.Ssh();
success = await ssh2.ConnectThroughSshAsync(ssh1,"serverssh2.com",22);
if (success != true) {
    Debug.WriteLine(ssh2.LastErrorText);
    return;
}

// Authenticate with ssh2...
success = await ssh2.AuthenticatePwAsync("ssh2Login","ssh2Password");
if (success != true) {
    Debug.WriteLine(ssh2.LastErrorText);
    return;
}

Chilkat.Socket socket = new Chilkat.Socket();

// Tell the socket object to connect to our destination server though the ssh2 tunnel (which itself is routed through ssh1).
// The connection looks like this:  ApplicationSocket(TLS) => ServerSSH1 => ServerSSH2 => DestinationServer
success = socket.UseSsh(ssh2);
if (success != true) {
    Debug.WriteLine(socket.LastErrorText);
    return;
}

// Connect using TLS to www.chilkatsoft.com
// We could also tunnel a bare TCP connection by specifying port 80 with useTls = false.
bool useTls = true;
int maxWaitMillisec = 20000;
success = await socket.ConnectAsync("www.chilkatsoft.com",443,useTls,maxWaitMillisec);
if (success != true) {
    Debug.WriteLine(socket.LastErrorText);
    return;
}

// Once the multiple hop SSH tunneled connection is setup,  the socket programming
// is identical to the normal case where we have a direct connection.

// Tell the socket object that all text is to be sent in the utf-8 encoding,
// and the text received is assumed to be utf-8.
socket.StringCharset = "utf-8";

// Send an HTTP HEAD request:
success = await socket.SendStringAsync("HEAD / HTTP/1.1\r\nHost: www.chilkatsoft.com\r\n\r\n");
if (success != true) {
    Debug.WriteLine(socket.LastErrorText);
    return;
}

// Wait a maximum of 4 seconds while no data is forthcoming:
socket.MaxReadIdleMs = 4000;

// Get the 1st response line, which should be "HTTP/1.1 200 OK"
string responseStatusLine = await socket.ReceiveToCRLFAsync();
if (socket.LastMethodSuccess != true) {
    Debug.WriteLine(socket.LastErrorText);
    return;
}

Debug.WriteLine("StatusLine: " + responseStatusLine);

// Now get the 1st line of the response header:
string responseHeaderLine = await socket.ReceiveToCRLFAsync();
if (socket.LastMethodSuccess != true) {
    Debug.WriteLine(socket.LastErrorText);
    return;
}

Debug.WriteLine("HeaderLine: " + responseHeaderLine);

// Now read the remainder of the response header by reading until a double CRLF is seen:
string remainderOfHeader = await socket.ReceiveUntilMatchAsync("\r\n\r\n");
if (socket.LastMethodSuccess != true) {
    Debug.WriteLine(socket.LastErrorText);
    return;
}

Debug.WriteLine("Remainder: " + remainderOfHeader);

// Close the connection with the server.  This closes the tunnel through ssh2.
// Wait a max of 20 seconds (20000 millsec)
success = await socket.CloseAsync(20000);

// Close the connection with ssh2.  (This closes the the tunnel through ssh1.)
// The connection with ssh1 is still alive, and may be used for more connections.
ssh2.Disconnect();

ssh1.Disconnect();

 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.