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authorAris Adamantiadis <aris@0xbadc0de.be>2005-08-18 10:08:56 +0000
committerAris Adamantiadis <aris@0xbadc0de.be>2005-08-18 10:08:56 +0000
commitbb50d8f46429cecb43826c824b2d8139dcdb793e (patch)
tree9a7bfadf2d95d62111d7dde5222bb65794958eca /libssh
parent56602ca031726a7682de3164b8f7f3da4881f7bb (diff)
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ssh-1 experimental support
git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@10 7dcaeef0-15fb-0310-b436-a5af3365683c
Diffstat (limited to 'libssh')
-rw-r--r--libssh/auth1.c202
-rw-r--r--libssh/channels1.c225
2 files changed, 427 insertions, 0 deletions
diff --git a/libssh/auth1.c b/libssh/auth1.c
new file mode 100644
index 0000000..65fc905
--- /dev/null
+++ b/libssh/auth1.c
@@ -0,0 +1,202 @@
+/* auth1.c deals with authentication with SSH-1 protocol */
+/*
+Copyright 2005 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/priv.h"
+#include "libssh/ssh1.h"
+#include <string.h>
+#include <netdb.h>
+
+/*
+static void burn(char *ptr){
+ if(ptr)
+ memset(ptr,'X',strlen(ptr));
+}
+*/
+#ifdef HAVE_SSH1
+static int wait_auth1_status(SSH_SESSION *session){
+ /* wait for a packet */
+ if(packet_read(session))
+ return SSH_AUTH_ERROR;
+ if(packet_translate(session))
+ return SSH_AUTH_ERROR;
+ switch(session->in_packet.type){
+ case SSH_SMSG_SUCCESS:
+ return SSH_AUTH_SUCCESS;
+ case SSH_SMSG_FAILURE:
+ return SSH_AUTH_DENIED;
+ }
+ ssh_set_error(session,SSH_FATAL,"Was waiting for a SUCCESS or "
+ "FAILURE, got %d",session->in_packet.type);
+ return SSH_AUTH_ERROR;
+}
+static int send_username(SSH_SESSION *session, char *username){
+ STRING *user;
+ /* returns SSH_AUTH_SUCCESS or SSH_AUTH_DENIED */
+ if(session->auth_service_asked)
+ return session->auth_service_asked;
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH_CMSG_USER);
+ if(!username)
+ if(!(username=session->options->username)){
+ if(ssh_options_default_username(session->options))
+ return session->auth_service_asked=SSH_AUTH_ERROR;
+ else
+ username=session->options->username;
+ }
+ user=string_from_char(username);
+ buffer_add_ssh_string(session->out_buffer,user);
+ free(user);
+ packet_send(session);
+ session->auth_service_asked=wait_auth1_status(session);
+ return session->auth_service_asked;
+}
+
+/* use the "none" authentication question */
+
+int ssh_userauth1_none(SSH_SESSION *session,char *username){
+ return send_username(session,username);
+}
+
+/*
+int ssh_userauth_offer_pubkey(SSH_SESSION *session, char *username,int type, STRING *publickey){
+ STRING *user;
+ STRING *service;
+ STRING *method;
+ STRING *algo;
+ int err=SSH_AUTH_ERROR;
+ if(!username)
+ if(!(username=session->options->username)){
+ if(options_default_username(session->options))
+ return SSH_AUTH_ERROR;
+ else
+ username=session->options->username;
+ }
+ if(ask_userauth(session))
+ return SSH_AUTH_ERROR;
+ user=string_from_char(username);
+ service=string_from_char("ssh-connection");
+ method=string_from_char("publickey");
+ algo=string_from_char(ssh_type_to_char(type));
+
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH2_MSG_USERAUTH_REQUEST);
+ buffer_add_ssh_string(session->out_buffer,user);
+ buffer_add_ssh_string(session->out_buffer,service);
+ buffer_add_ssh_string(session->out_buffer,method);
+ buffer_add_u8(session->out_buffer,0);
+ buffer_add_ssh_string(session->out_buffer,algo);
+ buffer_add_ssh_string(session->out_buffer,publickey);
+ packet_send(session);
+ err=wait_auth_status(session,0);
+ free(user);
+ free(method);
+ free(service);
+ free(algo);
+ return err;
+}
+*/
+int ssh_userauth1_offer_pubkey(SSH_SESSION *session, char *username, int type,
+ STRING *pubkey){
+ return SSH_AUTH_DENIED;
+}
+
+/*
+int ssh_userauth_pubkey(SSH_SESSION *session, char *username, STRING *publickey, PRIVATE_KEY *privatekey){
+ STRING *user;
+ STRING *service;
+ STRING *method;
+ STRING *algo;
+ STRING *sign;
+ int err=SSH_AUTH_ERROR;
+ if(!username)
+ if(!(username=session->options->username)){
+ if(options_default_username(session->options))
+ return err;
+ else
+ username=session->options->username;
+ }
+ if(ask_userauth(session))
+ return err;
+ user=string_from_char(username);
+ service=string_from_char("ssh-connection");
+ method=string_from_char("publickey");
+ algo=string_from_char(ssh_type_to_char(privatekey->type));
+
+
+*/ /* we said previously the public key was accepted */
+/* packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH2_MSG_USERAUTH_REQUEST);
+ buffer_add_ssh_string(session->out_buffer,user);
+ buffer_add_ssh_string(session->out_buffer,service);
+ buffer_add_ssh_string(session->out_buffer,method);
+ buffer_add_u8(session->out_buffer,1);
+ buffer_add_ssh_string(session->out_buffer,algo);
+ buffer_add_ssh_string(session->out_buffer,publickey);
+ sign=ssh_do_sign(session,session->out_buffer,privatekey);
+ if(sign){
+ buffer_add_ssh_string(session->out_buffer,sign);
+ free(sign);
+ packet_send(session);
+ err=wait_auth_status(session,0);
+ }
+ free(user);
+ free(service);
+ free(method);
+ free(algo);
+ return err;
+}
+*/
+
+int ssh_userauth1_password(SSH_SESSION *session,char *username,char *password){
+ STRING *password_s;
+ int err;
+ err=send_username(session,username);
+ if(err!=SSH_AUTH_DENIED)
+ return err;
+ /* we trick a bit here. A known flaw in SSH1 protocol is that it's
+ * easy to guess password sizes.
+ * not that sure ...
+ */
+ if(strlen(password)>=128){
+ /* not risky to disclose the size of such a big password .. */
+ password_s=string_from_char(password);
+ } else {
+ /* fill the password string from random things. the strcpy
+ * ensure there is at least a nul byte after the password.
+ * most implementation won't see the garbage at end.
+ * why garbage ? because nul bytes will be compressed by
+ * gzip and disclose password len.
+ */
+ password_s=string_new(128);
+ ssh_get_random(password_s->string,128,0);
+ strcpy(password_s->string,password);
+ }
+
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH_CMSG_AUTH_PASSWORD);
+ buffer_add_ssh_string(session->out_buffer,password_s);
+ string_burn(password_s);
+ free(password_s);
+ packet_send(session);
+ return wait_auth1_status(session);
+}
+
+#endif /* HAVE_SSH1 */
diff --git a/libssh/channels1.c b/libssh/channels1.c
new file mode 100644
index 0000000..375f8e6
--- /dev/null
+++ b/libssh/channels1.c
@@ -0,0 +1,225 @@
+/* channels1.c */
+/* Support for SSH-1 type channels */
+/*
+Copyright 2005 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 <string.h>
+#include <stdlib.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include "libssh/priv.h"
+#include "libssh/ssh1.h"
+
+#ifdef HAVE_SSH1
+
+/* this is a big hack. In fact, SSH-1 doesn't make a clever use of channels.
+ * The whole packets concerning Shells are sent outside of a channel.
+ * Thus, an inside limitation of this behaviour is that you can't only
+ * request one Shell.
+ * And i don't even know yet how they managed to imbed two "channel"
+ * into one protocol.
+ */
+
+int channel_open_session1(CHANNEL *chan){
+ // we guess we are requesting an *exec* channel. It can only have
+ // only one exec channel. so we abort with an error if we need more than
+ SSH_SESSION *session=chan->session;
+ if(session->exec_channel_opened){
+ ssh_set_error(session,SSH_REQUEST_DENIED,"SSH-1 supports only one execution channel. One has already been opened");
+ return -1;
+ }
+ session->exec_channel_opened=1;
+ chan->open=1;
+ ssh_say(2,"Opened a ssh1 channel session\n");
+ return 0;
+}
+/* 10 SSH_CMSG_REQUEST_PTY
+ *
+ * string TERM environment variable value (e.g. vt100)
+ * 32-bit int terminal height, rows (e.g., 24)
+ * 32-bit int terminal width, columns (e.g., 80)
+ * 32-bit int terminal width, pixels (0 if no graphics) (e.g., 480)
+ * 32-bit int terminal height, pixels (0 if no graphics) (e.g., 640)
+ * n bytes tty modes encoded in binary
+ * Some day, someone should have a look at that nasty tty encoded. It's
+ * much simplier under ssh2. I just hope the defaults values are ok ...
+ */
+
+int channel_request_pty_size1(CHANNEL *channel, char *terminal, int col,
+ int row){
+ STRING *str;
+ SSH_SESSION *session=channel->session;
+ str=string_from_char(terminal);
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH_CMSG_REQUEST_PTY);
+ buffer_add_ssh_string(session->out_buffer,str);
+ free(str);
+ buffer_add_u32(session->out_buffer,ntohl(row));
+ buffer_add_u32(session->out_buffer,ntohl(col));
+ buffer_add_u32(session->out_buffer,0); /* x */
+ buffer_add_u32(session->out_buffer,0); /* y */
+ buffer_add_u8(session->out_buffer,0); /* tty things */
+ ssh_say(2,"Opening a ssh1 pty\n");
+ if(packet_send(session))
+ return -1;
+ if(packet_read(session))
+ return -1;
+ if(packet_translate(session))
+ return -1;
+ switch (session->in_packet.type){
+ case SSH_SMSG_SUCCESS:
+ ssh_say(2,"pty : Success\n");
+ return 0;
+ break;
+ case SSH_SMSG_FAILURE:
+ ssh_set_error(session,SSH_REQUEST_DENIED,
+ "Server denied PTY allocation");
+ ssh_say(2,"pty : denied\n");
+ break;
+ default:
+ ssh_say(2,"pty : error\n");
+ ssh_set_error(session,SSH_FATAL,
+ "Received unexpected packet type %d",
+ session->in_packet.type);
+ return -1;
+ }
+ return -1;
+}
+
+int channel_change_pty_size1(CHANNEL *channel, int cols, int rows){
+ SSH_SESSION *session=channel->session;
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH_CMSG_WINDOW_SIZE);
+ buffer_add_u32(session->out_buffer,ntohl(rows));
+ buffer_add_u32(session->out_buffer,ntohl(cols));
+ buffer_add_u32(session->out_buffer,0);
+ buffer_add_u32(session->out_buffer,0);
+ if(packet_send(session))
+ return -1;
+ ssh_say(2,"Change pty size send\n");
+ packet_wait(session,SSH_SMSG_SUCCESS,1);
+ switch (session->in_packet.type){
+ case SSH_SMSG_SUCCESS:
+ ssh_say(2,"pty size changed\n");
+ return 0;
+ break;
+ case SSH_SMSG_FAILURE:
+ ssh_say(2,"pty size change denied\n");
+ ssh_set_error(session,SSH_REQUEST_DENIED,"pty size change denied");
+ return -1;
+ }
+ ssh_set_error(session,SSH_FATAL,"Received unexpected packet type %d",
+ session->in_packet.type);
+ return -1;
+}
+
+int channel_request_shell1(CHANNEL *channel){
+ SSH_SESSION *session=channel->session;
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH_CMSG_EXEC_SHELL);
+ if(packet_send(session))
+ return -1;
+ ssh_say(2,"Launched a shell\n");
+ return 0;
+}
+
+int channel_request_exec1(CHANNEL *channel, char *cmd){
+ SSH_SESSION *session=channel->session;
+ STRING *command=string_from_char(cmd);
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH_CMSG_EXEC_CMD);
+ buffer_add_ssh_string(session->out_buffer,command);
+ free(command);
+ if(packet_send(session))
+ return -1;
+ ssh_say(2,"executing %s...\n",cmd);
+ return 0;
+}
+
+static void channel_rcv_data1(SSH_SESSION *session, int is_stderr){
+ CHANNEL *channel;
+ STRING *str;
+ channel=session->channels; // Easy. hack this when multiple channel
+ // are comming
+ str=buffer_get_ssh_string(session->in_buffer);
+ if(!str){
+ ssh_say(0,"Invalid data packet !\n");
+ return;
+ }
+ ssh_say(3,"adding %d bytes data in %d\n",string_len(str),is_stderr);
+ channel_default_bufferize(channel,str->string,string_len(str),
+ is_stderr);
+ free(str);
+}
+
+static void channel_rcv_close1(SSH_SESSION *session){
+ CHANNEL *channel=session->channels;
+ u32 status;
+ buffer_get_u32(session->in_buffer,&status);
+ /* it's much more than a channel closing. spec says it's the last
+ * message sent by server (strange)
+ */
+ /* actually status is lost somewhere */
+ channel->open=0;
+ channel->remote_eof=1;
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH_CMSG_EXIT_CONFIRMATION);
+ packet_send(session);
+}
+
+void channel_handle1(SSH_SESSION *session, int type){
+ ssh_say(3,"Channel_handle1(%d)\n",type);
+ switch (type){
+ case SSH_SMSG_STDOUT_DATA:
+ channel_rcv_data1(session,0);
+ break;
+ case SSH_SMSG_EXITSTATUS:
+ channel_rcv_close1(session);
+ break;
+ default:
+ ssh_say(0,"Unexepected message %d\n",type);
+
+ }
+}
+
+int channel_write1(CHANNEL *channel, void *data, int len){
+ SSH_SESSION *session=channel->session;
+ int origlen=len;
+ int effectivelen;
+ while(len>0){
+ packet_clear_out(session);
+ buffer_add_u8(session->out_buffer,SSH_CMSG_STDIN_DATA);
+ if(len > 32000)
+ effectivelen=32000;
+ else
+ effectivelen=len;
+ buffer_add_u32(session->out_buffer,htonl(effectivelen));
+ buffer_add_data(session->out_buffer,data,effectivelen);
+ data+=effectivelen;
+ len-=effectivelen;
+ if(packet_send(session))
+ return -1;
+ }
+ return origlen;
+}
+
+#endif /* HAVE_SSH1 */