mirror of
https://git.libssh.org/projects/libssh.git
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misc: Rename libssh/ to src/
This commit is contained in:
Andreas Schneider
814
src/client.c
Normal file
814
src/client.c
Normal file
@@ -0,0 +1,814 @@
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/*
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* client.c - SSH client functions
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*
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* This file is part of the SSH Library
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*
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* Copyright (c) 2003-2008 by Aris Adamantiadis
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*
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* The SSH Library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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*
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* The SSH Library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with the SSH Library; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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* MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef _WIN32
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#include <arpa/inet.h>
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#endif
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#include "libssh/priv.h"
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#include "libssh/ssh2.h"
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#include "libssh/buffer.h"
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#include "libssh/packet.h"
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#include "libssh/socket.h"
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#include "libssh/session.h"
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#include "libssh/dh.h"
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#define set_status(session, status) do {\
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if (session->callbacks && session->callbacks->connect_status_function) \
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session->callbacks->connect_status_function(session->callbacks->userdata, status); \
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} while (0)
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/**
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* @internal
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* @brief Callback to be called when the socket is connected or had a
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* connection error. Changes the state of the session and updates the error
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* message.
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* @param code one of SSH_SOCKET_CONNECTED_OK or SSH_SOCKET_CONNECTED_ERROR
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* @param user is a pointer to session
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*/
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static void socket_callback_connected(int code, int errno_code, void *user){
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ssh_session session=(ssh_session)user;
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enter_function();
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ssh_log(session,SSH_LOG_RARE,"Socket connection callback: %d (%d)",code, errno_code);
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if(code == SSH_SOCKET_CONNECTED_OK)
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session->session_state=SSH_SESSION_STATE_SOCKET_CONNECTED;
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else {
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session->session_state=SSH_SESSION_STATE_ERROR;
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ssh_set_error(session,SSH_FATAL,"%s",strerror(errno_code));
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}
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session->ssh_connection_callback(session);
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leave_function();
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}
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/**
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* @internal
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*
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* @brief Gets the banner from socket and saves it in session.
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* Updates the session state
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*
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* @param data pointer to the beginning of header
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* @param len size of the banner
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* @param user is a pointer to session
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* @returns Number of bytes processed, or zero if the banner is not complete.
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*/
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static int callback_receive_banner(const void *data, size_t len, void *user) {
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char *buffer = (char *)data;
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ssh_session session=(ssh_session) user;
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char *str = NULL;
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size_t i;
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int ret=0;
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enter_function();
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for(i=0;i<len;++i){
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#ifdef WITH_PCAP
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if(session->pcap_ctx && buffer[i] == '\n'){
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ssh_pcap_context_write(session->pcap_ctx,SSH_PCAP_DIR_IN,buffer,i+1,i+1);
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}
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#endif
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if(buffer[i]=='\r')
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buffer[i]='\0';
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if(buffer[i]=='\n'){
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buffer[i]='\0';
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str=strdup(buffer);
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/* number of bytes read */
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ret=i+1;
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session->serverbanner=str;
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session->session_state=SSH_SESSION_STATE_BANNER_RECEIVED;
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ssh_log(session,SSH_LOG_PACKET,"Received banner: %s",str);
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session->ssh_connection_callback(session);
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leave_function();
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return ret;
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}
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if(i>127){
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/* Too big banner */
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session->session_state=SSH_SESSION_STATE_ERROR;
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ssh_set_error(session,SSH_FATAL,"Receiving banner: too large banner");
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leave_function();
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return 0;
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}
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}
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leave_function();
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return ret;
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}
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/**
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* @internal
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*
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* @brief Analyze the SSH banner to find out if we have a SSHv1 or SSHv2
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* server.
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*
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* @param session The session to analyze the banner from.
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* @param ssh1 The variable which is set if it is a SSHv1 server.
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* @param ssh2 The variable which is set if it is a SSHv2 server.
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*
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* @return 0 on success, < 0 on error.
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*
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* @see ssh_get_banner()
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*/
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static int ssh_analyze_banner(ssh_session session, int *ssh1, int *ssh2) {
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const char *banner = session->serverbanner;
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const char *openssh;
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ssh_log(session, SSH_LOG_RARE, "Analyzing banner: %s", banner);
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if (strncmp(banner, "SSH-", 4) != 0) {
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ssh_set_error(session, SSH_FATAL, "Protocol mismatch: %s", banner);
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return -1;
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}
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/*
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* Typical banners e.g. are:
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* SSH-1.5-blah
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* SSH-1.99-blah
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* SSH-2.0-blah
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*/
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switch(banner[4]) {
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case '1':
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*ssh1 = 1;
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if (banner[6] == '9') {
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*ssh2 = 1;
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} else {
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*ssh2 = 0;
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}
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break;
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case '2':
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*ssh1 = 0;
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*ssh2 = 1;
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break;
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default:
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ssh_set_error(session, SSH_FATAL, "Protocol mismatch: %s", banner);
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return -1;
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}
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openssh = strstr(banner, "OpenSSH");
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if (openssh != NULL) {
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int major, minor;
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major = strtol(openssh + 8, (char **) NULL, 10);
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minor = strtol(openssh + 10, (char **) NULL, 10);
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session->openssh = SSH_VERSION_INT(major, minor, 0);
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ssh_log(session, SSH_LOG_RARE,
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"We are talking to an OpenSSH server version: %d.%d (%x)",
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major, minor, session->openssh);
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}
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return 0;
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}
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/** @internal
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* @brief Sends a SSH banner to the server.
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*
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* @param session The SSH session to use.
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*
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* @param server Send client or server banner.
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*
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* @return 0 on success, < 0 on error.
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*/
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int ssh_send_banner(ssh_session session, int server) {
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const char *banner = NULL;
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char buffer[128] = {0};
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int err=SSH_ERROR;
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enter_function();
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banner = session->version == 1 ? CLIENTBANNER1 : CLIENTBANNER2;
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if (session->xbanner) {
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banner = session->xbanner;
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}
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if (server) {
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session->serverbanner = strdup(banner);
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if (session->serverbanner == NULL) {
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goto end;
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}
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} else {
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session->clientbanner = strdup(banner);
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if (session->clientbanner == NULL) {
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goto end;
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}
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}
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snprintf(buffer, 128, "%s\n", banner);
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if (ssh_socket_write(session->socket, buffer, strlen(buffer)) == SSH_ERROR) {
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goto end;
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}
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if (ssh_socket_nonblocking_flush(session->socket) == SSH_ERROR){
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goto end;
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}
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#ifdef WITH_PCAP
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if(session->pcap_ctx)
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ssh_pcap_context_write(session->pcap_ctx,SSH_PCAP_DIR_OUT,buffer,strlen(buffer),strlen(buffer));
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#endif
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err=SSH_OK;
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end:
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leave_function();
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return err;
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}
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SSH_PACKET_CALLBACK(ssh_packet_dh_reply){
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ssh_string f = NULL;
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ssh_string pubkey = NULL;
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ssh_string signature = NULL;
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(void)type;
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(void)user;
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ssh_log(session,SSH_LOG_PROTOCOL,"Received SSH_KEXDH_REPLY");
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if(session->session_state!= SSH_SESSION_STATE_DH &&
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session->dh_handshake_state != DH_STATE_INIT_SENT){
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ssh_set_error(session,SSH_FATAL,"ssh_packet_dh_reply called in wrong state : %d:%d",
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session->session_state,session->dh_handshake_state);
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goto error;
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}
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pubkey = buffer_get_ssh_string(packet);
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if (pubkey == NULL){
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ssh_set_error(session,SSH_FATAL, "No public key in packet");
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goto error;
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}
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dh_import_pubkey(session, pubkey);
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f = buffer_get_ssh_string(packet);
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if (f == NULL) {
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ssh_set_error(session,SSH_FATAL, "No F number in packet");
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goto error;
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}
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if (dh_import_f(session, f) < 0) {
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ssh_set_error(session, SSH_FATAL, "Cannot import f number");
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goto error;
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}
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ssh_string_burn(f);
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ssh_string_free(f);
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f=NULL;
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signature = buffer_get_ssh_string(packet);
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if (signature == NULL) {
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ssh_set_error(session, SSH_FATAL, "No signature in packet");
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goto error;
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}
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session->dh_server_signature = signature;
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||||
signature=NULL; /* ownership changed */
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if (dh_build_k(session) < 0) {
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ssh_set_error(session, SSH_FATAL, "Cannot build k number");
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goto error;
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||||
}
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||||
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||||
/* Send the MSG_NEWKEYS */
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if (buffer_add_u8(session->out_buffer, SSH2_MSG_NEWKEYS) < 0) {
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||||
goto error;
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||||
}
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||||
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||||
packet_send(session);
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||||
ssh_log(session, SSH_LOG_PROTOCOL, "SSH_MSG_NEWKEYS sent");
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||||
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||||
session->dh_handshake_state = DH_STATE_NEWKEYS_SENT;
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||||
return SSH_PACKET_USED;
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error:
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session->session_state=SSH_SESSION_STATE_ERROR;
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||||
return SSH_PACKET_USED;
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||||
}
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||||
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||||
SSH_PACKET_CALLBACK(ssh_packet_newkeys){
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||||
ssh_string signature = NULL;
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||||
int rc;
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||||
(void)packet;
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||||
(void)user;
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||||
(void)type;
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||||
ssh_log(session, SSH_LOG_PROTOCOL, "Received SSH_MSG_NEWKEYS");
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||||
if(session->session_state!= SSH_SESSION_STATE_DH &&
|
||||
session->dh_handshake_state != DH_STATE_NEWKEYS_SENT){
|
||||
ssh_set_error(session,SSH_FATAL,"ssh_packet_newkeys called in wrong state : %d:%d",
|
||||
session->session_state,session->dh_handshake_state);
|
||||
goto error;
|
||||
}
|
||||
if(session->server){
|
||||
/* server things are done in server.c */
|
||||
session->dh_handshake_state=DH_STATE_FINISHED;
|
||||
} else {
|
||||
/* client */
|
||||
rc = make_sessionid(session);
|
||||
if (rc != SSH_OK) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
/*
|
||||
* Set the cryptographic functions for the next crypto
|
||||
* (it is needed for generate_session_keys for key lengths)
|
||||
*/
|
||||
if (crypt_set_algorithms(session)) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (generate_session_keys(session) < 0) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* Verify the host's signature. FIXME do it sooner */
|
||||
signature = session->dh_server_signature;
|
||||
session->dh_server_signature = NULL;
|
||||
if (signature_verify(session, signature)) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* forget it for now ... */
|
||||
ssh_string_burn(signature);
|
||||
ssh_string_free(signature);
|
||||
signature=NULL;
|
||||
/*
|
||||
* Once we got SSH2_MSG_NEWKEYS we can switch next_crypto and
|
||||
* current_crypto
|
||||
*/
|
||||
if (session->current_crypto) {
|
||||
crypto_free(session->current_crypto);
|
||||
session->current_crypto=NULL;
|
||||
}
|
||||
|
||||
/* FIXME later, include a function to change keys */
|
||||
session->current_crypto = session->next_crypto;
|
||||
|
||||
session->next_crypto = crypto_new();
|
||||
if (session->next_crypto == NULL) {
|
||||
ssh_set_error_oom(session);
|
||||
goto error;
|
||||
}
|
||||
}
|
||||
session->dh_handshake_state = DH_STATE_FINISHED;
|
||||
session->ssh_connection_callback(session);
|
||||
return SSH_PACKET_USED;
|
||||
error:
|
||||
session->session_state=SSH_SESSION_STATE_ERROR;
|
||||
return SSH_PACKET_USED;
|
||||
}
|
||||
|
||||
/** @internal
|
||||
* @brief launches the DH handshake state machine
|
||||
* @param session session handle
|
||||
* @returns SSH_OK or SSH_ERROR
|
||||
* @warning this function returning is no proof that DH handshake is
|
||||
* completed
|
||||
*/
|
||||
static int dh_handshake(ssh_session session) {
|
||||
ssh_string e = NULL;
|
||||
ssh_string f = NULL;
|
||||
ssh_string signature = NULL;
|
||||
int rc = SSH_ERROR;
|
||||
|
||||
enter_function();
|
||||
|
||||
switch (session->dh_handshake_state) {
|
||||
case DH_STATE_INIT:
|
||||
if (buffer_add_u8(session->out_buffer, SSH2_MSG_KEXDH_INIT) < 0) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (dh_generate_x(session) < 0) {
|
||||
goto error;
|
||||
}
|
||||
if (dh_generate_e(session) < 0) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
e = dh_get_e(session);
|
||||
if (e == NULL) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (buffer_add_ssh_string(session->out_buffer, e) < 0) {
|
||||
goto error;
|
||||
}
|
||||
ssh_string_burn(e);
|
||||
ssh_string_free(e);
|
||||
e=NULL;
|
||||
|
||||
rc = packet_send(session);
|
||||
if (rc == SSH_ERROR) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
session->dh_handshake_state = DH_STATE_INIT_SENT;
|
||||
case DH_STATE_INIT_SENT:
|
||||
/* wait until ssh_packet_dh_reply is called */
|
||||
break;
|
||||
case DH_STATE_NEWKEYS_SENT:
|
||||
/* wait until ssh_packet_newkeys is called */
|
||||
break;
|
||||
case DH_STATE_FINISHED:
|
||||
leave_function();
|
||||
return SSH_OK;
|
||||
default:
|
||||
ssh_set_error(session, SSH_FATAL, "Invalid state in dh_handshake(): %d",
|
||||
session->dh_handshake_state);
|
||||
leave_function();
|
||||
return SSH_ERROR;
|
||||
}
|
||||
|
||||
leave_function();
|
||||
return SSH_AGAIN;
|
||||
error:
|
||||
if(e != NULL){
|
||||
ssh_string_burn(e);
|
||||
ssh_string_free(e);
|
||||
}
|
||||
if(f != NULL){
|
||||
ssh_string_burn(f);
|
||||
ssh_string_free(f);
|
||||
}
|
||||
if(signature != NULL){
|
||||
ssh_string_burn(signature);
|
||||
ssh_string_free(signature);
|
||||
}
|
||||
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* @internal
|
||||
* @brief handles a SSH_SERVICE_ACCEPT packet
|
||||
*
|
||||
*/
|
||||
SSH_PACKET_CALLBACK(ssh_packet_service_accept){
|
||||
(void)packet;
|
||||
(void)type;
|
||||
(void)user;
|
||||
enter_function();
|
||||
session->auth_service_state=SSH_AUTH_SERVICE_ACCEPTED;
|
||||
ssh_log(session, SSH_LOG_PACKET,
|
||||
"Received SSH_MSG_SERVICE_ACCEPT");
|
||||
leave_function();
|
||||
return SSH_PACKET_USED;
|
||||
}
|
||||
|
||||
/**
|
||||
* @internal
|
||||
*
|
||||
* @brief Request a service from the SSH server.
|
||||
*
|
||||
* Service requests are for example: ssh-userauth, ssh-connection, etc.
|
||||
*
|
||||
* @param session The session to use to ask for a service request.
|
||||
* @param service The service request.
|
||||
*
|
||||
* @return SSH_OK on success
|
||||
* @return SSH_ERROR on error
|
||||
* @return SSH_AGAIN No response received yet
|
||||
* @bug actually only works with ssh-userauth
|
||||
*/
|
||||
int ssh_service_request(ssh_session session, const char *service) {
|
||||
ssh_string service_s = NULL;
|
||||
int rc=SSH_ERROR;
|
||||
enter_function();
|
||||
switch(session->auth_service_state){
|
||||
case SSH_AUTH_SERVICE_NONE:
|
||||
if (buffer_add_u8(session->out_buffer, SSH2_MSG_SERVICE_REQUEST) < 0) {
|
||||
break;
|
||||
}
|
||||
service_s = ssh_string_from_char(service);
|
||||
if (service_s == NULL) {
|
||||
break;
|
||||
}
|
||||
|
||||
if (buffer_add_ssh_string(session->out_buffer,service_s) < 0) {
|
||||
ssh_string_free(service_s);
|
||||
break;
|
||||
}
|
||||
ssh_string_free(service_s);
|
||||
|
||||
if (packet_send(session) == SSH_ERROR) {
|
||||
ssh_set_error(session, SSH_FATAL,
|
||||
"Sending SSH2_MSG_SERVICE_REQUEST failed.");
|
||||
break;
|
||||
}
|
||||
|
||||
ssh_log(session, SSH_LOG_PACKET,
|
||||
"Sent SSH_MSG_SERVICE_REQUEST (service %s)", service);
|
||||
session->auth_service_state=SSH_AUTH_SERVICE_SENT;
|
||||
rc=SSH_AGAIN;
|
||||
break;
|
||||
case SSH_AUTH_SERVICE_DENIED:
|
||||
ssh_set_error(session,SSH_FATAL,"ssh_auth_service request denied");
|
||||
break;
|
||||
case SSH_AUTH_SERVICE_ACCEPTED:
|
||||
rc=SSH_OK;
|
||||
break;
|
||||
case SSH_AUTH_SERVICE_SENT:
|
||||
rc=SSH_AGAIN;
|
||||
break;
|
||||
case SSH_AUTH_SERVICE_USER_SENT:
|
||||
/* Invalid state, SSH1 specific */
|
||||
rc=SSH_ERROR;
|
||||
break;
|
||||
}
|
||||
|
||||
leave_function();
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* @addtogroup libssh_session
|
||||
*
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* @internal
|
||||
*
|
||||
* @brief A function to be called each time a step has been done in the
|
||||
* connection.
|
||||
*/
|
||||
static void ssh_client_connection_callback(ssh_session session){
|
||||
int ssh1,ssh2;
|
||||
enter_function();
|
||||
switch(session->session_state){
|
||||
case SSH_SESSION_STATE_NONE:
|
||||
case SSH_SESSION_STATE_CONNECTING:
|
||||
case SSH_SESSION_STATE_SOCKET_CONNECTED:
|
||||
break;
|
||||
case SSH_SESSION_STATE_BANNER_RECEIVED:
|
||||
if (session->serverbanner == NULL) {
|
||||
goto error;
|
||||
}
|
||||
set_status(session, 0.4f);
|
||||
ssh_log(session, SSH_LOG_RARE,
|
||||
"SSH server banner: %s", session->serverbanner);
|
||||
|
||||
/* Here we analyze the different protocols the server allows. */
|
||||
if (ssh_analyze_banner(session, &ssh1, &ssh2) < 0) {
|
||||
goto error;
|
||||
}
|
||||
/* Here we decide which version of the protocol to use. */
|
||||
if (ssh2 && session->ssh2) {
|
||||
session->version = 2;
|
||||
} else if(ssh1 && session->ssh1) {
|
||||
session->version = 1;
|
||||
} else if(ssh1 && !session->ssh1){
|
||||
#ifdef WITH_SSH1
|
||||
ssh_set_error(session, SSH_FATAL,
|
||||
"SSH-1 protocol not available (configure session to allow SSH-1)");
|
||||
goto error;
|
||||
#else
|
||||
ssh_set_error(session, SSH_FATAL,
|
||||
"SSH-1 protocol not available (libssh compiled without SSH-1 support)");
|
||||
goto error;
|
||||
#endif
|
||||
} else {
|
||||
ssh_set_error(session, SSH_FATAL,
|
||||
"No version of SSH protocol usable (banner: %s)",
|
||||
session->serverbanner);
|
||||
goto error;
|
||||
}
|
||||
/* from now, the packet layer is handling incoming packets */
|
||||
if(session->version==2)
|
||||
session->socket_callbacks.data=ssh_packet_socket_callback;
|
||||
#ifdef WITH_SSH1
|
||||
else
|
||||
session->socket_callbacks.data=ssh_packet_socket_callback1;
|
||||
#endif
|
||||
ssh_packet_set_default_callbacks(session);
|
||||
ssh_send_banner(session, 0);
|
||||
set_status(session, 0.5f);
|
||||
session->session_state=SSH_SESSION_STATE_INITIAL_KEX;
|
||||
break;
|
||||
case SSH_SESSION_STATE_INITIAL_KEX:
|
||||
/* TODO: This state should disappear in favor of get_key handle */
|
||||
#ifdef WITH_SSH1
|
||||
if(session->version==1){
|
||||
if (ssh_get_kex1(session) < 0)
|
||||
goto error;
|
||||
set_status(session,0.6f);
|
||||
session->connected = 1;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
break;
|
||||
case SSH_SESSION_STATE_KEXINIT_RECEIVED:
|
||||
set_status(session,0.6f);
|
||||
ssh_list_kex(session, &session->server_kex);
|
||||
if (set_kex(session) < 0) {
|
||||
goto error;
|
||||
}
|
||||
if (ssh_send_kex(session, 0) < 0) {
|
||||
goto error;
|
||||
}
|
||||
set_status(session,0.8f);
|
||||
session->session_state=SSH_SESSION_STATE_DH;
|
||||
if (dh_handshake(session) == SSH_ERROR) {
|
||||
goto error;
|
||||
}
|
||||
case SSH_SESSION_STATE_DH:
|
||||
if(session->dh_handshake_state==DH_STATE_FINISHED){
|
||||
set_status(session,1.0f);
|
||||
session->connected = 1;
|
||||
session->session_state=SSH_SESSION_STATE_AUTHENTICATING;
|
||||
}
|
||||
break;
|
||||
case SSH_SESSION_STATE_AUTHENTICATING:
|
||||
break;
|
||||
case SSH_SESSION_STATE_ERROR:
|
||||
goto error;
|
||||
default:
|
||||
ssh_set_error(session,SSH_FATAL,"Invalid state %d",session->session_state);
|
||||
}
|
||||
leave_function();
|
||||
return;
|
||||
error:
|
||||
ssh_socket_close(session->socket);
|
||||
session->alive = 0;
|
||||
session->session_state=SSH_SESSION_STATE_ERROR;
|
||||
leave_function();
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Connect to the ssh server.
|
||||
*
|
||||
* @param[in] session The ssh session to connect.
|
||||
*
|
||||
* @returns SSH_OK on success, SSH_ERROR on error.
|
||||
*
|
||||
* @see ssh_new()
|
||||
* @see ssh_disconnect()
|
||||
*/
|
||||
int ssh_connect(ssh_session session) {
|
||||
int ret;
|
||||
|
||||
if (session == NULL) {
|
||||
ssh_set_error(session, SSH_FATAL, "Invalid session pointer");
|
||||
return SSH_ERROR;
|
||||
}
|
||||
|
||||
enter_function();
|
||||
|
||||
session->alive = 0;
|
||||
session->client = 1;
|
||||
|
||||
if (ssh_init() < 0) {
|
||||
leave_function();
|
||||
return SSH_ERROR;
|
||||
}
|
||||
if (session->fd == SSH_INVALID_SOCKET && session->host == NULL && session->ProxyCommand == NULL) {
|
||||
ssh_set_error(session, SSH_FATAL, "Hostname required");
|
||||
leave_function();
|
||||
return SSH_ERROR;
|
||||
}
|
||||
|
||||
ret = ssh_options_apply(session);
|
||||
if (ret < 0) {
|
||||
ssh_set_error(session, SSH_FATAL, "Couldn't apply options");
|
||||
leave_function();
|
||||
return SSH_ERROR;
|
||||
}
|
||||
|
||||
session->ssh_connection_callback = ssh_client_connection_callback;
|
||||
session->session_state=SSH_SESSION_STATE_CONNECTING;
|
||||
ssh_socket_set_callbacks(session->socket,&session->socket_callbacks);
|
||||
session->socket_callbacks.connected=socket_callback_connected;
|
||||
session->socket_callbacks.data=callback_receive_banner;
|
||||
session->socket_callbacks.exception=ssh_socket_exception_callback;
|
||||
session->socket_callbacks.userdata=session;
|
||||
if (session->fd != SSH_INVALID_SOCKET) {
|
||||
ssh_socket_set_fd(session->socket, session->fd);
|
||||
ret=SSH_OK;
|
||||
#ifndef _WIN32
|
||||
} else if (session->ProxyCommand != NULL){
|
||||
ret=ssh_socket_connect_proxycommand(session->socket, session->ProxyCommand);
|
||||
#endif
|
||||
} else {
|
||||
ret=ssh_socket_connect(session->socket, session->host, session->port,
|
||||
session->bindaddr);
|
||||
|
||||
/*, session->timeout * 1000 + session->timeout_usec); */
|
||||
}
|
||||
if (ret == SSH_ERROR) {
|
||||
leave_function();
|
||||
return SSH_ERROR;
|
||||
}
|
||||
|
||||
set_status(session, 0.2f);
|
||||
|
||||
session->alive = 1;
|
||||
ssh_log(session,SSH_LOG_PROTOCOL,"Socket connecting, now waiting for the callbacks to work");
|
||||
while(session->session_state != SSH_SESSION_STATE_ERROR &&
|
||||
session->session_state != SSH_SESSION_STATE_AUTHENTICATING &&
|
||||
session->session_state != SSH_SESSION_STATE_DISCONNECTED){
|
||||
/* loop until SSH_SESSION_STATE_BANNER_RECEIVED or
|
||||
* SSH_SESSION_STATE_ERROR */
|
||||
ssh_handle_packets(session,-1);
|
||||
ssh_log(session,SSH_LOG_PACKET,"ssh_connect: Actual state : %d",session->session_state);
|
||||
}
|
||||
leave_function();
|
||||
if(session->session_state == SSH_SESSION_STATE_ERROR || session->session_state == SSH_SESSION_STATE_DISCONNECTED)
|
||||
return SSH_ERROR;
|
||||
return SSH_OK;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Get the issue banner from the server.
|
||||
*
|
||||
* This is the banner showing a disclaimer to users who log in,
|
||||
* typically their right or the fact that they will be monitored.
|
||||
*
|
||||
* @param[in] session The SSH session to use.
|
||||
*
|
||||
* @return A newly allocated string with the banner, NULL on error.
|
||||
*/
|
||||
char *ssh_get_issue_banner(ssh_session session) {
|
||||
if (session == NULL || session->banner == NULL) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return ssh_string_to_char(session->banner);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Get the version of the OpenSSH server, if it is not an OpenSSH server
|
||||
* then 0 will be returned.
|
||||
*
|
||||
* You can use the SSH_VERSION_INT macro to compare version numbers.
|
||||
*
|
||||
* @param[in] session The SSH session to use.
|
||||
*
|
||||
* @return The version number if available, 0 otherwise.
|
||||
*/
|
||||
int ssh_get_openssh_version(ssh_session session) {
|
||||
if (session == NULL) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return session->openssh;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Disconnect from a session (client or server).
|
||||
* The session can then be reused to open a new session.
|
||||
*
|
||||
* @param[in] session The SSH session to use.
|
||||
*/
|
||||
void ssh_disconnect(ssh_session session) {
|
||||
ssh_string str = NULL;
|
||||
|
||||
if (session == NULL) {
|
||||
return;
|
||||
}
|
||||
|
||||
enter_function();
|
||||
|
||||
if (ssh_socket_is_open(session->socket)) {
|
||||
if (buffer_add_u8(session->out_buffer, SSH2_MSG_DISCONNECT) < 0) {
|
||||
goto error;
|
||||
}
|
||||
if (buffer_add_u32(session->out_buffer,
|
||||
htonl(SSH2_DISCONNECT_BY_APPLICATION)) < 0) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
str = ssh_string_from_char("Bye Bye");
|
||||
if (str == NULL) {
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (buffer_add_ssh_string(session->out_buffer,str) < 0) {
|
||||
ssh_string_free(str);
|
||||
goto error;
|
||||
}
|
||||
ssh_string_free(str);
|
||||
|
||||
packet_send(session);
|
||||
ssh_socket_close(session->socket);
|
||||
}
|
||||
session->alive = 0;
|
||||
|
||||
error:
|
||||
leave_function();
|
||||
}
|
||||
|
||||
const char *ssh_copyright(void) {
|
||||
return SSH_STRINGIFY(LIBSSH_VERSION) " (c) 2003-2010 Aris Adamantiadis "
|
||||
"(aris@0xbadc0de.be) Distributed under the LGPL, please refer to COPYING"
|
||||
"file for information about your rights";
|
||||
}
|
||||
/** @} */
|
||||
|
||||
/* vim: set ts=4 sw=4 et cindent: */
|
||||
Reference in New Issue
Block a user