Chilkat Examples

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(C++) SSH Keyboard Authentication

Demonstrates how to implement keyboard authentication with an SSH server.

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#include <CkSsh.h>
#include <CkXml.h>

void ChilkatSample(void)
    {
    //  Important: It is helpful to send the contents of the
    //  sftp.LastErrorText property when sending email
    //  to support@chilkatsoft.com

    CkSsh ssh;

    //  Any string automatically begins a fully-functional 30-day trial.
    bool success = ssh.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        std::cout << ssh.lastErrorText() << "\r\n";
        return;
    }

    //  Set some timeouts, in milliseconds:
    ssh.put_ConnectTimeoutMs(5000);
    ssh.put_IdleTimeoutMs(15000);

    //  Connect to the SSH server.
    //  The standard SSH port = 22
    //  The hostname may be a hostname or IP address.
    int port;
    const char *hostname = 0;
    hostname = "www.my-ssh-server.com";
    port = 22;
    success = ssh.Connect(hostname,port);
    if (success != true) {
        std::cout << ssh.lastErrorText() << "\r\n";
        return;
    }

    //  Begin keyboard authentication..
    const char *xmlResponse = ssh.startKeyboardAuth("myLogin");
    if (ssh.get_LastMethodSuccess() != true) {
        std::cout << ssh.lastErrorText() << "\r\n";
        return;
    }

    //  If a user authentication banner was received, then your app
    //  may display it prior to prompting for the password.
    std::cout << "UserAuthBanner: " << ssh.userAuthBanner() << "\r\n";

    CkXml xml;

    success = xml.LoadXml(xmlResponse);
    //  Assume LoadXml succeeds for the example..
    if (xml.HasChildWithTag("success") == true) {
        std::cout << "No password required, already authenticated." << "\r\n";
        return;
    }

    if (xml.HasChildWithTag("error") == true) {
        std::cout << "Authentication already failed." << "\r\n";
        return;
    }

    //  See the online reference documentation for Chilkat SSH.
    //  The XML returned by StartKeyboardAuth will contain an infoRequest
    //  with one or more prompts that your application may choose to display.

    //  Call ContinueKeyboardAuth, passing in the whatever information is requires (such as the password).
    //  Typically, keyboard authentication requires one call to ContinueKeyboardAuth
    //  using the password.  Theoretically, the SSH server could prompt for additional pieces
    //  of information.  The authentication is completed when the XML returned contains
    //  either a "success" or "error" child node.

    //  This example asumes only one call to ContinueKeyboardAuth is required.
    xmlResponse = ssh.continueKeyboardAuth("myPassword");
    if (ssh.get_LastMethodSuccess() != true) {
        std::cout << ssh.lastErrorText() << "\r\n";
        return;
    }

    success = xml.LoadXml(xmlResponse);
    //  Assume LoadXml succeeds for the example..
    if (xml.HasChildWithTag("success") == true) {
        std::cout << "SSH Keyboard Authentication Successful!" << "\r\n";
        return;
    }

    if (xml.HasChildWithTag("error") == true) {
        std::cout << "Authentication failed." << "\r\n";
        return;
    }


    }

 

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