VS2008中的Libssh服務器身份驗證不順利

Question

我正在使用libssh庫創建與在遠程服務器上創建的ssh服務器的連接。一切順利，直到代碼從服務器獲取公鑰並詢問用戶是否要保存它。那裏的代碼崩潰的原因不明。我正在使用這個link給出的教程。

這是我迄今爲止編寫的代碼。任何關於這方面的幫助都會很棒。

#include <libssh/libssh.h> 
#include <iostream> 


using namespace std; 

int verifyServer(ssh_session); 

int main(){ 

    ssh_session my_ssh_session = ssh_new(); 
    if (my_ssh_session == NULL) 
     exit(-1); 

    int verbosity = SSH_LOG_PROTOCOL; 
    int port = 22; 
    int connect; 

    ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, "hostname"); 
    ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port); 
    ssh_options_set(my_ssh_session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity); 
    ssh_options_set(my_ssh_session, SSH_OPTIONS_USER, "username"); 

    connect = ssh_connect(my_ssh_session); 
    if(connect != SSH_OK){ 
     cout<<"Connection error!"<<endl; 
     ssh_free(my_ssh_session); 
     exit(-1); 
    } 
    int result = verifyServer(my_ssh_session); 
    if(result < 0){ 
     ssh_disconnect(my_ssh_session); 
     exit(-1); 
    } 
    connect = ssh_userauth_password(my_ssh_session, NULL, "password"); 

    if(connect != SSH_AUTH_SUCCESS){ 
     cout<<"Password authentication failed!"<<endl; 
     ssh_disconnect(my_ssh_session); 
     ssh_free(my_ssh_session); 
     exit(-1); 
    } 



    ssh_free(my_ssh_session); 

} 

int verifyServer(ssh_session session){ 
    int state, hlen; 
    unsigned char* hash = NULL; 
    char* hexa; 
    char buffer[10]; 

    state = ssh_is_server_known(session); 

    hlen = ssh_get_pubkey_hash(session, &hash); 
    if(hlen < 0){ 
     cout<<"Server public key hash error!"<<endl; 
     return -1; 
    } 

    switch(state){ 
     case SSH_SERVER_KNOWN_OK: 
      break; 

     case SSH_SERVER_KNOWN_CHANGED: 
      cout<<"Host key for the server has been changed to: \n"; 
      ssh_print_hexa("Public Key Hash", hash, hlen); 
      cout<<"For security reasons, connection will now be stopped.\n"; 
      free(hash); 
      return -1; 

     case SSH_SERVER_FOUND_OTHER: 
      cout<< "The host key for this server was not found but an other" 
       "type of key exists.\n"; 
      cout<<"An attacker might change the default server key to" 
       "confuse your client into thinking the key does not exist\n"; 
      free(hash); 
      return -1; 

     case SSH_SERVER_FILE_NOT_FOUND: 
      cout<<"Could not find known host file.\n"; 
      cout<<"If you accept the host key here, the file will be" 
       "automatically created.\n"; 

     case SSH_SERVER_NOT_KNOWN: 
      hexa = ssh_get_hexa(hash, hlen); 
      cout<<"The server is unknown. Do you trust the host key?\n"; 
      cout<<"Public key hash : "<<hexa<<endl; 
      free(hexa); 
      if (fgets(buffer, sizeof(buffer), stdin) == NULL) 
      { 
       free(hash); 
       return -1; 
      } 
      if (_strnicmp(buffer, "yes", 3) != 0) 
      { 
       free(hash); 
       return -1; 
      } 
      if (ssh_write_knownhost(session) < 0) 
      { 
       fprintf(stderr, "Error %s\n", strerror(errno)); 
       free(hash); 
       return -1; 
      } 
      break; 

     case SSH_SERVER_ERROR: 
      cout<<ssh_get_error(session); 
      free(hash); 
      return -1; 
    } 

    free(hash); 
    return 0; 
} 

以下是出現錯誤的輸出窗口。

Answer 1

我沒有看到你打電話ssh_init（），這是非常重要的。你看過關於http://api.libssh.org的教程和源代碼中的例子嗎？