(C++) SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

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#include <CkJsonObject.h>
#include <CkCrypt2.h>
#include <CkSecureString.h>
#include <CkSFtp.h>

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

    bool success;

    //  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=="
    //  }

    CkJsonObject json;
    json.LoadFile("qa_data/passwords/ssh.json");

    CkCrypt2 crypt;

    //  These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
    crypt.put_CryptAlgorithm("aes");
    crypt.put_CipherMode("cbc");
    crypt.put_KeyLength(128);
    crypt.SetEncodedKey("000102030405060708090A0B0C0D0E0F","hex");
    crypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F","hex");
    crypt.put_EncodingMode("base64");

    CkSecureString ssLogin;
    CkSecureString ssPassword;

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

    CkSFtp sftp;

    success = sftp.Connect("MY-SSH-SERVER-DOMAIN-OR-IP",22);
    if (success != true) {
        std::cout << sftp.lastErrorText() << "\r\n";
        return;
    }

    //  Authenticate using secure strings
    success = sftp.AuthenticateSecPw(ssLogin,ssPassword);
    if (success != true) {
        std::cout << sftp.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "SFTP Authentication successful." << "\r\n";

    sftp.Disconnect();
    }