(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.

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#include <CkSFtp.h>
#include <CkCert.h>
#include <CkSshKey.h>

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

    CkSFtp sftp;

    const char *hostname = "sftp.example.com";
    int port = 22;
    bool success = sftp.Connect(hostname,port);
    if (success != true) {
        std::cout << sftp.lastErrorText() << "\r\n";
        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)
    CkCert cert;
    success = cert.LoadPfxFile("qa_data/pfx/example.pfx","pfx_password");
    if (success != true) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    // Get the cert's private key (as PEM) to be used for SSH authentication.
    // (The public key is installed on the server.)
    const char *privKeyPem = cert.getPrivateKeyPem();
    if (cert.get_LastMethodSuccess() == false) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    CkSshKey key;

    // Load a private key from a PEM string:
    success = key.FromOpenSshPrivateKey(privKeyPem);
    if (success != true) {
        std::cout << key.lastErrorText() << "\r\n";
        return;
    }

    // Authenticate with the SSH server.
    success = sftp.AuthenticatePk("myLogin",key);
    if (success != true) {
        std::cout << sftp.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Public-Key Authentication Successful!" << "\r\n";
    }