(C) Multiple Hop SSH to SFTP

Demonstrates how to SFTP through an intermediate SSH server (multiple hop). The scheme looks like this:

Application => ServerSSH1 => ServerSFtp

The ConnectThroughSsh method is added in Chilkat version 9.5.0.55 to accomplish this task.

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#include <C_CkSsh.h>
#include <C_CkSFtp.h>

void ChilkatSample(void)
    {
    HCkSsh ssh1;
    const char *hostname;
    const char *port;
    BOOL success;
    HCkSFtp sftp;
    const char *remoteFilePath;
    const char *localFilePath;

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

    ssh1 = CkSsh_Create();

    // Hostname may be an IP address or domain name:
    hostname = "192.168.1.111";
    port = 22;

    // Connect directly to the 1st SSH server:
    success = CkSsh_Connect(ssh1,hostname,port);
    if (success != TRUE) {
        printf("%s\n",CkSsh_lastErrorText(ssh1));
        CkSsh_Dispose(ssh1);
        return;
    }

    // Authenticate using login/password:
    success = CkSsh_AuthenticatePw(ssh1,"myLogin","myPassword");
    if (success != TRUE) {
        printf("%s\n",CkSsh_lastErrorText(ssh1));
        CkSsh_Dispose(ssh1);
        return;
    }

    // Connect through the 1st SSH connection to reach a 2nd SSH server (for SFTP)
    // Note: Any number of connections may be simultaneously tunneled through a single
    // existing SSH connection.
    sftp = CkSFtp_Create();

    // Connect to some SSH/SFTP server through ssh1.
    success = CkSFtp_ConnectThroughSsh(sftp,ssh1,"sftp.someremoteserver.com",22);
    if (success != TRUE) {
        printf("%s\n",CkSFtp_lastErrorText(sftp));
        CkSsh_Dispose(ssh1);
        CkSFtp_Dispose(sftp);
        return;
    }

    // Authenticate with the SFTP server. 
    success = CkSFtp_AuthenticatePw(sftp,"myLogin","myPassword");
    if (success != TRUE) {
        printf("%s\n",CkSFtp_lastErrorText(sftp));
        CkSsh_Dispose(ssh1);
        CkSFtp_Dispose(sftp);
        return;
    }

    // After authenticating, the SFTP subsystem must be initialized:
    success = CkSFtp_InitializeSftp(sftp);
    if (success != TRUE) {
        printf("%s\n",CkSFtp_lastErrorText(sftp));
        CkSsh_Dispose(ssh1);
        CkSFtp_Dispose(sftp);
        return;
    }

    // Upload from the local file to the SSH server.
    // Important -- the remote filepath is the 1st argument,
    // the local filepath is the 2nd argument;
    remoteFilePath = "hamlet.xml";
    localFilePath = "c:/temp/hamlet.xml";

    success = CkSFtp_UploadFileByName(sftp,remoteFilePath,localFilePath);
    if (success != TRUE) {
        printf("%s\n",CkSFtp_lastErrorText(sftp));
        CkSsh_Dispose(ssh1);
        CkSFtp_Dispose(sftp);
        return;
    }

    printf("Success.\n");

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

    // ...
    // ...
    // ...

    CkSsh_Disconnect(ssh1);


    CkSsh_Dispose(ssh1);
    CkSFtp_Dispose(sftp);

    }