C

SSH Public Key Authentication

See more SSH Examples

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

#include <C_CkSsh.h>
#include <C_CkSshKey.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkSsh ssh;
    const char *hostname;
    int port;
    HCkSshKey key;
    const char *privKey;

    success = FALSE;

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

    ssh = CkSsh_Create();

    // Set some timeouts, in milliseconds:
    CkSsh_putConnectTimeoutMs(ssh,5000);
    CkSsh_putIdleTimeoutMs(ssh,15000);

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

    key = CkSshKey_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 = CkSshKey_loadText(key,"myPrivateKey.pem");
    if (CkSshKey_getLastMethodSuccess(key) != TRUE) {
        printf("%s\n",CkSshKey_lastErrorText(key));
        CkSsh_Dispose(ssh);
        CkSshKey_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 = CkSshKey_FromOpenSshPrivateKey(key,privKey);
    if (success != TRUE) {
        printf("%s\n",CkSshKey_lastErrorText(key));
        CkSsh_Dispose(ssh);
        CkSshKey_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 = CkSsh_AuthenticatePk(ssh,"myLogin",key);
    if (success != TRUE) {
        printf("%s\n",CkSsh_lastErrorText(ssh));
        CkSsh_Dispose(ssh);
        CkSshKey_Dispose(key);
        return;
    }

    printf("%s\n",CkSsh_lastErrorText(ssh));
    printf("Public-Key Authentication Successful!\n");


    CkSsh_Dispose(ssh);
    CkSshKey_Dispose(key);

    }