C++ 如何用c++建立简单的ssh连接
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How to establish a simple ssh connection with c++
提问by mac johnsto
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-cbcI haven't found anything so far so I hope to your help. The code I use:
我正在尝试制作一个将连接到 ssh 服务器（我的笔记本电脑）的 C++ 程序。服务器没问题，因为我可以通过腻子连接。虽然到目前为止我写的程序不能。在我的代码中，我使用库 libssh.h 并进行开发，我使用了 Visual Studio 2015。我得到的错误是：crypt_set_algorithms2: no crypto algorithm function found for 3des-cbc我到目前为止还没有找到任何东西，所以我希望你帮助。我使用的代码：
#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);
}
采纳答案by Jakuje
Try to use different cipher. 3des-cbcis broken and probably disabled on your server already.
尝试使用不同的密码。3des-cbc已损坏并且可能已在您的服务器上禁用。
There is really nice tutorialwith simple session.
有简单的会话非常好的教程。
Removing the line makes it working for me on Ubuntu (don't know where you found it):
删除该行使其在 Ubuntu 上对我有用（不知道您在哪里找到它）：
ssh_options_set(my_ssh_session, SSH_OPTIONS_CIPHERS_C_S,"aes128-ctr");
If not, what version of libsshare you using? Isn't it some obsolete one?
如果没有，libssh您使用的是什么版本？是不是有些过时了？
回答by mac johnsto
Finally got it! I removed the line
终于拿到了！我删除了该行
ssh_options_set(my_ssh_session, SSH_OPTIONS_CIPHERS_C_S,"aes128-ctr");
Then I used the ssh.dll from libssh v0-7.2instead of the ssh.dll of v0-7.1I used before. The ssh.dll is located in libssh-0.7.2\bin. If you take an error like the msvcr120d.dllis missing try to change from debug to release in visual studio.
然后我使用了 libssh v0-7.2 中的ssh.dll而不是我之前使用的 v0-7.1 中的ssh.dll。ssh.dll 位于libssh-0.7.2\bin 中。如果您遇到类似msvcr120d.dll丢失的错误，请尝试在 Visual Studio 中从调试更改为发布。
