Unicode C

SFTP Authentication using X.509 Certificates

See more SFTP Examples

Demonstrates how to authenticate with an SSH/SFTP server using an certificate's private key.

Note: See X.509v3 Certificates for SSH Authentication for more information.

Unicode C

#include <C_CkSFtpW.h>
#include <C_CkCertW.h>
#include <C_CkSshKeyW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkSFtpW sftp;
    const wchar_t *hostname;
    int port;
    HCkCertW cert;
    const wchar_t *privKeyPem;
    HCkSshKeyW key;

    success = FALSE;

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

    sftp = CkSFtpW_Create();

    hostname = L"sftp.example.com";
    port = 22;
    success = CkSFtpW_Connect(sftp,hostname,port);
    if (success != TRUE) {
        wprintf(L"%s\n",CkSFtpW_lastErrorText(sftp));
        CkSFtpW_Dispose(sftp);
        return;
    }

    // Load the cert + private key from a .pfx.
    // Note: Chilkat provides methods for loading certs and private keys from many sources, including smart cards and USB tokens (HSM's)
    cert = CkCertW_Create();
    success = CkCertW_LoadPfxFile(cert,L"qa_data/pfx/example.pfx",L"pfx_password");
    if (success != TRUE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkSFtpW_Dispose(sftp);
        CkCertW_Dispose(cert);
        return;
    }

    // Get the cert's private key (as PEM) to be used for SSH authentication.
    // (The public key is installed on the server.)
    privKeyPem = CkCertW_getPrivateKeyPem(cert);
    if (CkCertW_getLastMethodSuccess(cert) == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkSFtpW_Dispose(sftp);
        CkCertW_Dispose(cert);
        return;
    }

    key = CkSshKeyW_Create();

    // Load a private key from a PEM string:
    success = CkSshKeyW_FromOpenSshPrivateKey(key,privKeyPem);
    if (success != TRUE) {
        wprintf(L"%s\n",CkSshKeyW_lastErrorText(key));
        CkSFtpW_Dispose(sftp);
        CkCertW_Dispose(cert);
        CkSshKeyW_Dispose(key);
        return;
    }

    // Authenticate with the SSH server.
    success = CkSFtpW_AuthenticatePk(sftp,L"myLogin",key);
    if (success != TRUE) {
        wprintf(L"%s\n",CkSFtpW_lastErrorText(sftp));
        CkSFtpW_Dispose(sftp);
        CkCertW_Dispose(cert);
        CkSshKeyW_Dispose(key);
        return;
    }

    wprintf(L"Public-Key Authentication Successful!\n");


    CkSFtpW_Dispose(sftp);
    CkCertW_Dispose(cert);
    CkSshKeyW_Dispose(key);

    }