C

SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

C

#include <C_CkJsonObject.h>
#include <C_CkCrypt2.h>
#include <C_CkSecureString.h>
#include <C_CkSFtp.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject json;
    HCkCrypt2 crypt;
    HCkSecureString ssLogin;
    HCkSecureString ssPassword;
    HCkSFtp 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 = CkJsonObject_Create();
    CkJsonObject_LoadFile(json,"qa_data/passwords/ssh.json");

    crypt = CkCrypt2_Create();

    //  These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
    CkCrypt2_putCryptAlgorithm(crypt,"aes");
    CkCrypt2_putCipherMode(crypt,"cbc");
    CkCrypt2_putKeyLength(crypt,128);
    CkCrypt2_SetEncodedKey(crypt,"000102030405060708090A0B0C0D0E0F","hex");
    CkCrypt2_SetEncodedIV(crypt,"000102030405060708090A0B0C0D0E0F","hex");
    CkCrypt2_putEncodingMode(crypt,"base64");

    ssLogin = CkSecureString_Create();
    ssPassword = CkSecureString_Create();

    //  Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
    //  a randomly generated session key.)
    CkCrypt2_DecryptSecureENC(crypt,CkJsonObject_stringOf(json,"ssh_login"),ssLogin);
    CkCrypt2_DecryptSecureENC(crypt,CkJsonObject_stringOf(json,"ssh_password"),ssPassword);

    sftp = CkSFtp_Create();

    success = CkSFtp_Connect(sftp,"MY-SSH-SERVER-DOMAIN-OR-IP",22);
    if (success != TRUE) {
        printf("%s\n",CkSFtp_lastErrorText(sftp));
        CkJsonObject_Dispose(json);
        CkCrypt2_Dispose(crypt);
        CkSecureString_Dispose(ssLogin);
        CkSecureString_Dispose(ssPassword);
        CkSFtp_Dispose(sftp);
        return;
    }

    //  Authenticate using secure strings
    success = CkSFtp_AuthenticateSecPw(sftp,ssLogin,ssPassword);
    if (success != TRUE) {
        printf("%s\n",CkSFtp_lastErrorText(sftp));
        CkJsonObject_Dispose(json);
        CkCrypt2_Dispose(crypt);
        CkSecureString_Dispose(ssLogin);
        CkSecureString_Dispose(ssPassword);
        CkSFtp_Dispose(sftp);
        return;
    }

    printf("SFTP Authentication successful.\n");

    CkSFtp_Disconnect(sftp);


    CkJsonObject_Dispose(json);
    CkCrypt2_Dispose(crypt);
    CkSecureString_Dispose(ssLogin);
    CkSecureString_Dispose(ssPassword);
    CkSFtp_Dispose(sftp);

    }