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/*
* This file is part of the SSH Library
*
* Copyright (c) 2018 by Red Hat, Inc.
*
* Author: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The SSH Library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SSH Library; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#include "config.h"
#include <libssh/libssh.h>
#include <libssh/sftp.h>
#include <libssh/callbacks.h>
#define SSHD_DEFAULT_USER "libssh"
#define SSHD_DEFAULT_PASSWORD "libssh"
#define SSHD_DEFAULT_PORT 2222
#define SSHD_DEFAULT_ADDRESS "127.0.0.1"
#define SSHD_DEFAULT_PCAP_FILE "debug.server.pcap"
#define SSHD_BANNER_MESSAGE "Test Banner Message\nlibssh-send-banner\n"
#ifndef KEYS_FOLDER
#ifdef _WIN32
#define KEYS_FOLDER
#else
#define KEYS_FOLDER "/etc/ssh/"
#endif
#endif
#define BUF_SIZE 1048576
#define SESSION_END (SSH_CLOSED | SSH_CLOSED_ERROR)
#define SFTP_SERVER_PATH "/usr/lib/sftp-server"
#ifdef HAVE_PTY_H
#include <pty.h>
#endif
/* A userdata struct for channel. */
struct channel_data_st {
/* pid of the child process the channel will spawn. */
pid_t pid;
/* For PTY allocation */
socket_t pty_master;
socket_t pty_slave;
/* For communication with the child process. */
socket_t child_stdin;
socket_t child_stdout;
/* Only used for subsystem and exec requests. */
socket_t child_stderr;
/* Event which is used to poll the above descriptors. */
ssh_event event;
/* Terminal size struct. */
struct winsize *winsize;
/* This pointer will hold the server state for default callbacks */
void *server_state;
/* This pointer is useful to set data for custom callbacks */
void *extra_data;
sftp_session sftp;
};
/* A userdata struct for session. */
struct session_data_st {
/* Pointer to the channel the session will allocate. */
ssh_channel channel;
int auth_attempts;
int authenticated;
const char *username;
const char *password;
#ifdef WITH_PCAP
ssh_pcap_file pcap;
#endif
/* This pointer will hold the server state for default callbacks */
void *server_state;
/* This pointer is useful to set data for custom callbacks */
void *extra_data;
};
int auth_password_cb(ssh_session session, const char *user,
const char *password, void *userdata);
#if WITH_GSSAPI
int auth_gssapi_mic_cb(ssh_session session, const char *user,
const char *principal, void *userdata);
#endif
int channel_data_cb(ssh_session session, ssh_channel channel,
void *data, uint32_t len, int is_stderr, void *userdata);
void channel_eof_cb(ssh_session session, ssh_channel channel,
void *userdata);
void channel_close_cb(ssh_session session, ssh_channel channel,
void *userdata);
void channel_signal_cb (ssh_session session,
ssh_channel channel,
const char *signal,
void *userdata);
void channel_exit_status_cb (ssh_session session,
ssh_channel channel,
int exit_status,
void *userdata);
void channel_exit_signal_cb(ssh_session session,
ssh_channel channel,
const char *signal,
int core,
const char *errmsg,
const char *lang,
void *userdata);
int channel_pty_request_cb(ssh_session session, ssh_channel channel,
const char *term, int cols, int rows, int py, int px, void *userdata);
int channel_pty_resize_cb(ssh_session session, ssh_channel channel,
int cols, int rows, int py, int px, void *userdata);
int channel_shell_request_cb(ssh_session session, ssh_channel channel,
void *userdata);
void channel_auth_agent_req_callback(ssh_session session,
ssh_channel channel, void *userdata);
void channel_x11_req_callback(ssh_session session,
ssh_channel channel,
int single_connection,
const char *auth_protocol,
const char *auth_cookie,
uint32_t screen_number,
void *userdata);
int channel_exec_request_cb(ssh_session session,
ssh_channel channel,
const char *command,
void *userdata);
int channel_env_request_cb(ssh_session session,
ssh_channel channel, const char *env_name, const char *env_value,
void *userdata);
int channel_subsystem_request_cb(ssh_session session,
ssh_channel channel, const char *subsystem,
void *userdata);
int channel_write_wontblock_cb(ssh_session session,
ssh_channel channel,
size_t bytes,
void *userdata);
ssh_channel channel_new_session_cb(ssh_session session, void *userdata);
/* The caller is responsible to set the userdata to be provided to the callback
* The caller is responsible to free the allocated structure
* */
struct ssh_server_callbacks_struct *get_default_server_cb(void);
/* The caller is responsible to set the userdata to be provided to the callback
* The caller is responsible to free the allocated structure
* */
struct ssh_channel_callbacks_struct *get_default_channel_cb(void);
void default_handle_session_cb(ssh_event event, ssh_session session,
struct server_state_st *state);
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