(C++) SSH Authentication using an SSH Certificate

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Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://www.chilkatsoft.com/understanding_ssh_certificates.asp

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#include <CkStringBuilder.h>
#include <CkSshKey.h>
#include <CkSsh.h>

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

    CkStringBuilder sbSshCert;
    bool success = sbSshCert.LoadFile("qa_data/sshCert/user_ecdsa_key-cert.pub","utf-8");
    if (success == false) {
        std::cout << "Failed to load user_ecdsa_key-cert.pub" << "\r\n";
        return;
    }

    CkStringBuilder sbPrivKey;
    success = sbPrivKey.LoadFile("qa_data/sshKeys/user_ecdsa_key","utf-8");
    if (success == false) {
        std::cout << "Failed to load user_ecdsa_key" << "\r\n";
        return;
    }

    CkSshKey key;
    // Provide the password if the user_ecdsa_key is stored in an encrypted format.
    key.put_Password("secret");
    success = key.FromOpenSshPrivateKey(sbPrivKey.getAsString());
    if (success == false) {
        std::cout << key.lastErrorText() << "\r\n";
        return;
    }

    // Indicate that the SSH certificate is to be used for authentication.
    // The UseSshCertificate method was added in Chilkat v11.0.0
    key.UseSshCertificate(sbSshCert.getAsString());

    CkSsh ssh;

    const char *hostname = "ssh.example.com";
    int port = 22;
    success = ssh.Connect(hostname,port);
    if (success != true) {
        std::cout << ssh.lastErrorText() << "\r\n";
        return;
    }

    success = ssh.AuthenticatePk("myLogin",key);
    if (success != true) {
        std::cout << ssh.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Public-Key Authentication using an SSH Certificate was Successful!" << "\r\n";
    }