(Unicode C) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

Chilkat C/C++ Library Downloads
MS Visual C/C++ C++ Builder Linux C/C++ Alpine Linux C/C++	MacOS C/C++ iOS C/C++ Android C/C++ MinGW C/C++

#include <C_CkSshW.h>
#include <C_CkSshKeyW.h>

void ChilkatSample(void)
    {
    HCkSshW ssh;
    const wchar_t *hostname;
    int port;
    BOOL success;
    HCkSshKeyW key;
    const wchar_t *privKey;

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

    ssh = CkSshW_Create();

    // Set some timeouts, in milliseconds:
    CkSshW_putConnectTimeoutMs(ssh,5000);
    CkSshW_putIdleTimeoutMs(ssh,15000);

    // Connect to the SSH server.  
    // The standard SSH port = 22
    // The hostname may be a hostname or IP address.
    hostname = L"sftp.example.com";
    port = 22;
    success = CkSshW_Connect(ssh,hostname,port);
    if (success != TRUE) {
        wprintf(L"%s\n",CkSshW_lastErrorText(ssh));
        CkSshW_Dispose(ssh);
        return;
    }

    key = CkSshKeyW_Create();

    // Read the PEM file into a string variable:
    // (This does not load the PEM file into the key.  The LoadText
    // method is a convenience method for loading the full contents of ANY text
    // file into a string variable.)
    privKey = CkSshKeyW_loadText(key,L"myPrivateKey.pem");
    if (CkSshKeyW_getLastMethodSuccess(key) != TRUE) {
        wprintf(L"%s\n",CkSshKeyW_lastErrorText(key));
        CkSshW_Dispose(ssh);
        CkSshKeyW_Dispose(key);
        return;
    }

    // Load a private key from a PEM string:
    // (Private keys may be loaded from OpenSSH and Putty formats.
    // Both encrypted and unencrypted private key file formats
    // are supported.  This example loads an unencrypted private
    // key in OpenSSH format.  PuTTY keys typically use the .ppk
    // file extension, while OpenSSH keys use the PEM format.
    // (For PuTTY keys, call FromPuttyPrivateKey instead.)
    success = CkSshKeyW_FromOpenSshPrivateKey(key,privKey);
    if (success != TRUE) {
        wprintf(L"%s\n",CkSshKeyW_lastErrorText(key));
        CkSshW_Dispose(ssh);
        CkSshKeyW_Dispose(key);
        return;
    }

    // Authenticate with the SSH server using the login and
    // private key.  (The corresponding public key should've 
    // been installed on the SSH server beforehand.)
    success = CkSshW_AuthenticatePk(ssh,L"myLogin",key);
    if (success != TRUE) {
        wprintf(L"%s\n",CkSshW_lastErrorText(ssh));
        CkSshW_Dispose(ssh);
        CkSshKeyW_Dispose(key);
        return;
    }

    wprintf(L"%s\n",CkSshW_lastErrorText(ssh));
    wprintf(L"Public-Key Authentication Successful!\n");


    CkSshW_Dispose(ssh);
    CkSshKeyW_Dispose(key);

    }