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Diffstat (limited to 'examples/samplesshd.c')
| -rw-r--r-- | examples/samplesshd.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/examples/samplesshd.c b/examples/samplesshd.c new file mode 100644 index 0000000..4c8a5bc --- /dev/null +++ b/examples/samplesshd.c @@ -0,0 +1,152 @@ +/* This is a sample implementation of a libssh based SSH server */ +/* +Copyright 2003-2009 Aris Adamantiadis + +This file is part of the SSH Library + +You are free to copy this file, modify it in any way, consider it being public +domain. This does not apply to the rest of the library though, but it is +allowed to cut-and-paste working code from this file to any license of +program. +The goal is to show the API in action. It's not a reference on how terminal +clients must be made or how a client should react. +*/ + +#include <libssh/libssh.h> +#include <libssh/server.h> +#include <unistd.h> +#include <string.h> +#include <stdio.h> +#ifndef KEYS_FOLDER +#ifdef _WIN32 +#define KEYS_FOLDER +#else +#define KEYS_FOLDER "/etc/ssh/" +#endif +#endif + +static 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_session session; + ssh_bind sshbind; + ssh_message message; + ssh_channel chan=0; + ssh_buffer buf; + int auth=0; + int sftp=0; + int i; + int r; + + sshbind=ssh_bind_new(); + session=ssh_new(); + ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_DSAKEY, KEYS_FOLDER "ssh_host_dsa_key"); + ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_RSAKEY, KEYS_FOLDER "ssh_host_rsa_key"); + + if(ssh_bind_listen(sshbind)<0){ + printf("Error listening to socket: %s\n",ssh_get_error(sshbind)); + return 1; + } + r=ssh_bind_accept(sshbind,session); + if(r==SSH_ERROR){ + printf("error accepting a connection : %s\n",ssh_get_error(sshbind)); + return 1; + } + 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_REQUEST_AUTH: + switch(ssh_message_subtype(message)){ + case SSH_AUTH_METHOD_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_METHOD_NONE: + default: + ssh_message_auth_set_methods(message,SSH_AUTH_METHOD_PASSWORD); + ssh_message_reply_default(message); + break; + } + break; + default: + ssh_message_reply_default(message); + } + ssh_message_free(message); + } while (!auth); + if(!auth){ + printf("auth error: %s\n",ssh_get_error(session)); + ssh_disconnect(session); + return 1; + } + do { + message=ssh_message_get(session); + if(message){ + switch(ssh_message_type(message)){ + case SSH_REQUEST_CHANNEL_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_REQUEST_CHANNEL && + 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"); + buf=buffer_new(); + do{ + i=channel_read_buffer(chan,buf,0,0); + if(i>0) + write(1,buffer_get(buf),buffer_get_len(buf)); + } while (i>0); + buffer_free(buf); + ssh_disconnect(session); + ssh_bind_free(sshbind); + ssh_finalize(); + return 0; +} + |