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/* sshd.c */
/* yet another ssh daemon (Yawn!) */
/*
Copyright 2004 Aris Adamantiadis
This file is part of the SSH Library
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 <libssh/libssh.h>
#include <libssh/server.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
int auth_password(char *user, char *password){
if(strcmp(user,"aris"))
return 0;
if(strcmp(password,"lala"))
return 0;
return 1; // authenticated
}
int main(int argc, char **argv){
SSH_OPTIONS *options=ssh_options_new();
SSH_SESSION *session;
SSH_BIND *ssh_bind;
SSH_MESSAGE *message;
CHANNEL *chan=0;
int auth=0;
int sftp=0;
int i;
ssh_options_getopt(options,&argc,argv);
ssh_options_set_dsa_server_key(options,"/etc/ssh/ssh_host_dsa_key");
ssh_options_set_rsa_server_key(options,"/etc/ssh/ssh_host_rsa_key");
ssh_bind=ssh_bind_new();
ssh_bind_set_options(ssh_bind,options);
if(ssh_bind_listen(ssh_bind)<0){
printf("Error listening to socket: %s\n",ssh_get_error(ssh_bind));
return 1;
}
session=ssh_bind_accept(ssh_bind);
if(!session){
printf("error accepting a connection : %s\n",ssh_get_error(ssh_bind));
return 1;
}
printf("Socket connecté : %d\n",ssh_get_fd(session));
if(ssh_accept(session)){
printf("ssh_accept : %s\n",ssh_get_error(session));
return 1;
}
do {
message=ssh_message_get(session);
if(!message)
break;
switch(ssh_message_type(message)){
case SSH_AUTH_REQUEST:
switch(ssh_message_subtype(message)){
case SSH_AUTH_PASSWORD:
printf("User %s wants to auth with pass %s\n",
ssh_message_auth_user(message),
ssh_message_auth_password(message));
if(auth_password(ssh_message_auth_user(message),
ssh_message_auth_password(message))){
auth=1;
ssh_message_auth_reply_success(message,0);
break;
}
// not authenticated, send default message
case SSH_AUTH_NONE:
default:
ssh_message_auth_set_methods(message,SSH_AUTH_PASSWORD);
ssh_message_reply_default(message);
break;
}
break;
default:
ssh_message_reply_default(message);
}
ssh_message_free(message);
} while (!auth);
if(!auth){
printf("error : %s\n",ssh_get_error(session));
ssh_finalize();
return 1;
}
do {
message=ssh_message_get(session);
if(message){
switch(ssh_message_type(message)){
case SSH_CHANNEL_REQUEST_OPEN:
if(ssh_message_subtype(message)==SSH_CHANNEL_SESSION){
chan=ssh_message_channel_request_open_reply_accept(message);
break;
}
default:
ssh_message_reply_default(message);
}
ssh_message_free(message);
}
} while(message && !chan);
if(!chan){
printf("error : %s\n",ssh_get_error(session));
ssh_finalize();
return 1;
}
do {
message=ssh_message_get(session);
if(message && ssh_message_type(message)==SSH_CHANNEL_REQUEST &&
ssh_message_subtype(message)==SSH_CHANNEL_REQUEST_SHELL){
// if(!strcmp(ssh_message_channel_request_subsystem(message),"sftp")){
sftp=1;
ssh_message_channel_request_reply_success(message);
break;
// }
}
if(!sftp){
ssh_message_reply_default(message);
}
ssh_message_free(message);
} while (message && !sftp);
if(!sftp){
printf("error : %s\n",ssh_get_error(session));
return 1;
}
printf("it works !\n");
BUFFER *buf=buffer_new();
do{
i=channel_read(chan,buf,0,0);
if(i>0)
write(1,buffer_get(buf),buffer_get_len(buf));
} while (i>0);
ssh_disconnect(session);
ssh_finalize();
return 0;
}
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