如何使用C ++建立简单的SSH连接 [英] How to establish a simple ssh connection with c++

问题描述

我正在尝试制作一个C ++程序，该程序将连接到ssh服务器(我的笔记本电脑).服务器还可以，因为我可以通过腻子连接.虽然到目前为止我写的程序还不能.在我的代码中，我使用的是libssh.h库，而在开发中，我使用的是Visual Studio2015.我得到的错误是: crypt_set_algorithms2:没有为3des-cbc找到加密算法功能 到目前为止我还没有找到任何东西，希望对您有所帮助. 我使用的代码:

I am trying to make a c++ program which will connect to an ssh server (my laptop). The server is ok because I can get connected via putty. Although the program I wrote so far can not. In my code I am using the library libssh.h and for development I used visual studio 2015. The error I get is: crypt_set_algorithms2: no crypto algorithm function found for 3des-cbc I haven't found anything so far so I hope to your help. The code I use:

#include <libssh/libssh.h>
#include <stdlib.h>
#include <stdio.h> 
int main()
{
    ssh_session my_ssh_session;
    int rc;
    int port = 22;
    int verbosity = SSH_LOG_PROTOCOL;
    char *password;
    // Open session and set options
    my_ssh_session = ssh_new();
    if (my_ssh_session == NULL)
        exit(-1);
    ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, "192.168.1.6");
    ssh_options_set(my_ssh_session, SSH_OPTIONS_USER, "john");
    ssh_options_set(my_ssh_session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity);
    ssh_options_set(my_ssh_session, SSH_OPTIONS_CIPHERS_C_S,"aes128-ctr");

    //ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);
    // Connect to server
    rc = ssh_connect(my_ssh_session);
    if (rc != SSH_OK)  
    {
        fprintf(stderr, "Error: %s\n", ssh_get_error(my_ssh_session)); //HERE IS WHERE I GET THE ERROR 
        ssh_free(my_ssh_session);
        exit(-1);
    }
    // Verify the server's identity
    // For the source code of verify_knowhost(), check previous example
/*  if (verify_knownhost(my_ssh_session) < 0)
    {
        ssh_disconnect(my_ssh_session);
        ssh_free(my_ssh_session);
        exit(-1);
    }
*/  
    // Authenticate ourselves
    password = "pass";
    rc = ssh_userauth_password(my_ssh_session, NULL, password);
    if (rc != SSH_AUTH_SUCCESS)
    {
        fprintf(stderr, "Error authenticating with password: %s\n",
            ssh_get_error(my_ssh_session));
        ssh_disconnect(my_ssh_session);
        ssh_free(my_ssh_session);
        exit(-1);
    }


        ssh_disconnect(my_ssh_session);
    ssh_free(my_ssh_session);
}

推荐答案

尝试使用其他密码. 3des-cbc已损坏，可能已在您的服务器上禁用.

Try to use different cipher. 3des-cbc is broken and probably disabled on your server already.

真的有不错的教程，带有简单的会话.

There is really nice tutorial with simple session.

删除该行可以使其在Ubuntu上为我工作(不知道在哪里找到):

Removing the line makes it working for me on Ubuntu (don't know where you found it):

ssh_options_set(my_ssh_session, SSH_OPTIONS_CIPHERS_C_S,"aes128-ctr");

如果没有，您使用的是什么版本的libssh?是不是有些过时了?

If not, what version of libssh are you using? Isn't it some obsolete one?

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