Unicode C

SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

Unicode C

#include <C_CkJsonObjectW.h>
#include <C_CkCrypt2W.h>
#include <C_CkSecureStringW.h>
#include <C_CkSFtpW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObjectW json;
    HCkCrypt2W crypt;
    HCkSecureStringW ssLogin;
    HCkSecureStringW ssPassword;
    HCkSFtpW sftp;

    success = FALSE;

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

    //  Imagine we've previously saved our encrypted login and password within a JSON config file
    //  that contains this:

    //  {
    //    "ssh_login": "2+qylFfC56Ck7OQQt/U2/w==",
    //    "ssh_password": "5neIq9Jmn0E3p71N6Yc8TA=="
    //  }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_LoadFile(json,L"qa_data/passwords/ssh.json");

    crypt = CkCrypt2W_Create();

    //  These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
    CkCrypt2W_putCryptAlgorithm(crypt,L"aes");
    CkCrypt2W_putCipherMode(crypt,L"cbc");
    CkCrypt2W_putKeyLength(crypt,128);
    CkCrypt2W_SetEncodedKey(crypt,L"000102030405060708090A0B0C0D0E0F",L"hex");
    CkCrypt2W_SetEncodedIV(crypt,L"000102030405060708090A0B0C0D0E0F",L"hex");
    CkCrypt2W_putEncodingMode(crypt,L"base64");

    ssLogin = CkSecureStringW_Create();
    ssPassword = CkSecureStringW_Create();

    //  Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
    //  a randomly generated session key.)
    CkCrypt2W_DecryptSecureENC(crypt,CkJsonObjectW_stringOf(json,L"ssh_login"),ssLogin);
    CkCrypt2W_DecryptSecureENC(crypt,CkJsonObjectW_stringOf(json,L"ssh_password"),ssPassword);

    sftp = CkSFtpW_Create();

    success = CkSFtpW_Connect(sftp,L"MY-SSH-SERVER-DOMAIN-OR-IP",22);
    if (success != TRUE) {
        wprintf(L"%s\n",CkSFtpW_lastErrorText(sftp));
        CkJsonObjectW_Dispose(json);
        CkCrypt2W_Dispose(crypt);
        CkSecureStringW_Dispose(ssLogin);
        CkSecureStringW_Dispose(ssPassword);
        CkSFtpW_Dispose(sftp);
        return;
    }

    //  Authenticate using secure strings
    success = CkSFtpW_AuthenticateSecPw(sftp,ssLogin,ssPassword);
    if (success != TRUE) {
        wprintf(L"%s\n",CkSFtpW_lastErrorText(sftp));
        CkJsonObjectW_Dispose(json);
        CkCrypt2W_Dispose(crypt);
        CkSecureStringW_Dispose(ssLogin);
        CkSecureStringW_Dispose(ssPassword);
        CkSFtpW_Dispose(sftp);
        return;
    }

    wprintf(L"SFTP Authentication successful.\n");

    CkSFtpW_Disconnect(sftp);


    CkJsonObjectW_Dispose(json);
    CkCrypt2W_Dispose(crypt);
    CkSecureStringW_Dispose(ssLogin);
    CkSecureStringW_Dispose(ssPassword);
    CkSFtpW_Dispose(sftp);

    }