Unicode C

SSH Authenticate with Password and Private Key

Demonstrates the Chilkat Ssh.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The first argument is the username, the second is the password, and the third is an SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

Background: Most servers require either a password or a public key, not both — but some high-security configurations mandate multi-factor SSH, combining something you know (the password) with something you have (the key). This method satisfies that policy in one call. As always, the password should come from a secure source rather than a literal in code.

Chilkat Unicode C Downloads

Download Chilkat for Unicode C

Unicode C

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkSshW ssh;
    int sshPort;
    const wchar_t *password;
    HCkSshKeyW privKey;
    const wchar_t *keyStr;

    success = FALSE;

    //  Demonstrates the Ssh.AuthenticatePwPk method, which authenticates with a server that requires
    //  BOTH a password and a private key.  The 1st argument is the username, the 2nd is the
    //  password, and the 3rd is an SshKey private key.

    ssh = CkSshW_Create();

    //  Connect to the SSH server.  Port 22 is the usual SSH port.
    sshPort = 22;
    success = CkSshW_Connect(ssh,L"ssh.example.com",sshPort);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSshW_lastErrorText(ssh));
        CkSshW_Dispose(ssh);
        return;
    }

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    password = L"mySshPassword";

    //  Load the SSH private key.  LoadText reads the file's text, which is then imported.
    privKey = CkSshKeyW_Create();
    keyStr = CkSshKeyW_loadText(privKey,L"qa_data/id_rsa");
    if (CkSshKeyW_getLastMethodSuccess(privKey) == FALSE) {
        wprintf(L"%s\n",CkSshKeyW_lastErrorText(privKey));
        CkSshW_Dispose(ssh);
        CkSshKeyW_Dispose(privKey);
        return;
    }

    success = CkSshKeyW_FromOpenSshPrivateKey(privKey,keyStr);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSshKeyW_lastErrorText(privKey));
        CkSshW_Dispose(ssh);
        CkSshKeyW_Dispose(privKey);
        return;
    }

    success = CkSshW_AuthenticatePwPk(ssh,L"mySshLogin",password,privKey);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSshW_lastErrorText(ssh));
        CkSshW_Dispose(ssh);
        CkSshKeyW_Dispose(privKey);
        return;
    }

    wprintf(L"Authenticated with password and private key.\n");

    CkSshW_Disconnect(ssh);


    CkSshW_Dispose(ssh);
    CkSshKeyW_Dispose(privKey);

    }