Mercurial > dropbear

annotate svr-x11fwd.c @ 994:5c5ade336926

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Prefer stronger algorithms in algorithm negotiation. Prefer diffie-hellman-group14-sha1 (2048 bit) over diffie-hellman-group1-sha1 (1024 bit). Due to meet-in-the-middle attacks the effective key length of three key 3DES is 112 bits. AES is stronger and faster then 3DES. Prefer to delay the start of compression until after authentication has completed. This avoids exposing compression code to attacks from unauthenticated users. (github pull request #9)
author Fedor Brunner <fedor.brunner@azet.sk>
date Fri, 23 Jan 2015 23:00:25 +0800
parents 5daedffd0769
children d3925ed45a85
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
10
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Matt Johnston <matt@ucc.asn.au>
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 #include "includes.h"
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26
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27 #ifndef DISABLE_X11FWD
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28 #include "x11fwd.h"
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29 #include "session.h"
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30 #include "ssh.h"
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31 #include "dbutil.h"
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32 #include "chansession.h"
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33 #include "channel.h"
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34 #include "packet.h"
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35 #include "buffer.h"
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36 #include "auth.h"
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37
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38 #define X11BASEPORT 6000
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39 #define X11BINDBASE 6010
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40
62
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41 static void x11accept(struct Listener* listener, int sock);
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42 static int bindport(int fd);
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43 static int send_msg_channel_open_x11(int fd, struct sockaddr_in* addr);
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44
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45 /* called as a request for a session channel, sets up listening X11 */
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46 /* returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
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47 int x11req(struct ChanSess * chansess) {
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48
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49 int fd;
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50
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51 if (!svr_pubkey_allows_x11fwd()) {
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52 return DROPBEAR_FAILURE;
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53 }
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54
10
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55 /* we already have an x11 connection */
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56 if (chansess->x11listener != NULL) {
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57 return DROPBEAR_FAILURE;
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58 }
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59
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
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60 chansess->x11singleconn = buf_getbool(ses.payload);
10
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61 chansess->x11authprot = buf_getstring(ses.payload, NULL);
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62 chansess->x11authcookie = buf_getstring(ses.payload, NULL);
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63 chansess->x11screennum = buf_getint(ses.payload);
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64
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65 /* create listening socket */
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66 fd = socket(PF_INET, SOCK_STREAM, 0);
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67 if (fd < 0) {
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68 goto fail;
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69 }
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70
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71 /* allocate port and bind */
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72 chansess->x11port = bindport(fd);
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73 if (chansess->x11port < 0) {
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74 goto fail;
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75 }
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76
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77 /* listen */
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78 if (listen(fd, 20) < 0) {
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79 goto fail;
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80 }
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81
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82 /* set non-blocking */
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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83 setnonblocking(fd);
10
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84
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85 /* listener code will handle the socket now.
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86 * No cleanup handler needed, since listener_remove only happens
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87 * from our cleanup anyway */
62
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88 chansess->x11listener = new_listener( &fd, 1, 0, chansess, x11accept, NULL);
10
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89 if (chansess->x11listener == NULL) {
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90 goto fail;
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91 }
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92
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93 return DROPBEAR_SUCCESS;
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94
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95 fail:
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96 /* cleanup */
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97 m_free(chansess->x11authprot);
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98 m_free(chansess->x11authcookie);
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99 close(fd);
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100
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101 return DROPBEAR_FAILURE;
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102 }
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103
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104 /* accepts a new X11 socket */
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105 /* returns DROPBEAR_FAILURE or DROPBEAR_SUCCESS */
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106 static void x11accept(struct Listener* listener, int sock) {
10
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107
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108 int fd;
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109 struct sockaddr_in addr;
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110 int len;
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111 int ret;
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
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parents: 12
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112 struct ChanSess * chansess = (struct ChanSess *)(listener->typedata);
10
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113
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114 len = sizeof(addr);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
115
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
116 fd = accept(sock, (struct sockaddr*)&addr, &len);
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
117 if (fd < 0) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
118 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
119 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
120
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
121 /* if single-connection we close it up */
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 12
diff changeset
122 if (chansess->x11singleconn) {
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 12
diff changeset
123 x11cleanup(chansess);
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
124 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
125
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
126 ret = send_msg_channel_open_x11(fd, &addr);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
127 if (ret == DROPBEAR_FAILURE) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
128 close(fd);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
129 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
130 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
132 /* This is called after switching to the user, and sets up the xauth
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
133 * and environment variables. */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
134 void x11setauth(struct ChanSess *chansess) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
135
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
136 char display[20]; /* space for "localhost:12345.123" */
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
137 FILE * authprog = NULL;
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
138 int val;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
139
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
140 if (chansess->x11listener == NULL) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
141 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
142 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
143
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
144 /* create the DISPLAY string */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
145 val = snprintf(display, sizeof(display), "localhost:%d.%d",
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 chansess->x11port - X11BASEPORT, chansess->x11screennum);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147 if (val < 0 || val >= (int)sizeof(display)) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
148 /* string was truncated */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
149 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
150 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
151
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
152 addnewvar("DISPLAY", display);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
153
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
154 /* create the xauth string */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
155 val = snprintf(display, sizeof(display), "unix:%d.%d",
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
156 chansess->x11port - X11BASEPORT, chansess->x11screennum);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
157 if (val < 0 || val >= (int)sizeof(display)) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
158 /* string was truncated */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
159 return;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
160 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
161
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
162 /* popen is a nice function - code is strongly based on OpenSSH's */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
163 authprog = popen(XAUTH_COMMAND, "w");
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
164 if (authprog) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
165 fprintf(authprog, "add %s %s %s\n",
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
166 display, chansess->x11authprot, chansess->x11authcookie);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
167 pclose(authprog);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
168 } else {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
169 fprintf(stderr, "Failed to run %s\n", XAUTH_COMMAND);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
170 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
171 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
172
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 12
diff changeset
173 void x11cleanup(struct ChanSess *chansess) {
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
174
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
175 m_free(chansess->x11authprot);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
176 m_free(chansess->x11authcookie);
95
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
177
723
0fd32a552ea5 Fix a few compile warnings
Matt Johnston <matt@ucc.asn.au>
parents: 651
diff changeset
178 TRACE(("chansess %p", chansess))
95
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
179 if (chansess->x11listener != NULL) {
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
180 remove_listener(chansess->x11listener);
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
181 chansess->x11listener = NULL;
b855bf63766c Don't try to remove non-eixtant listeners
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
182 }
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
183 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
184
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
185 static int x11_inithandler(struct Channel *channel) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
186 channel->prio = DROPBEAR_CHANNEL_PRIO_INTERACTIVE;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
187 return 0;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
188 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
189
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
190 static const struct ChanType chan_x11 = {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
191 0, /* sepfds */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
192 "x11",
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 723
diff changeset
193 x11_inithandler, /* inithandler */
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
194 NULL, /* checkclose */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
195 NULL, /* reqhandler */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
196 NULL /* closehandler */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
197 };
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
198
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
199
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
200 static int send_msg_channel_open_x11(int fd, struct sockaddr_in* addr) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
201
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
202 char* ipstring = NULL;
10
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204 if (send_msg_channel_open_init(fd, &chan_x11) == DROPBEAR_SUCCESS) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 ipstring = inet_ntoa(addr->sin_addr);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
206 buf_putstring(ses.writepayload, ipstring, strlen(ipstring));
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
207 buf_putint(ses.writepayload, addr->sin_port);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209 encrypt_packet();
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
210 return DROPBEAR_SUCCESS;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211 } else {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 return DROPBEAR_FAILURE;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
213 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
214
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
216
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
217 /* returns the port bound to, or -1 on failure.
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
218 * Will attempt to bind to a port X11BINDBASE (6010 usually) or upwards */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
219 static int bindport(int fd) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221 struct sockaddr_in addr;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 uint16_t port;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224 memset((void*)&addr, 0x0, sizeof(addr));
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 addr.sin_family = AF_INET;
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
228 /* if we can't find one in 2000 ports free, something's wrong */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
229 for (port = X11BINDBASE; port < X11BINDBASE + 2000; port++) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
230 addr.sin_port = htons(port);
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231 if (bind(fd, (struct sockaddr*)&addr,
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232 sizeof(struct sockaddr_in)) == 0) {
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
233 /* success */
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
Matt Johnston <matt@ucc.asn.au>
parents:
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234 return port;
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235 }
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parents:
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236 if (errno == EADDRINUSE) {
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237 /* try the next port */
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238 continue;
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239 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
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240 /* otherwise it was an error we don't know about */
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 475
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241 dropbear_log(LOG_DEBUG, "Failed to bind x11 socket");
10
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242 break;
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parents:
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243 }
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244 return -1;
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245 }
0f7d69d31b9d - renaming x11fwd.c to svr-x11fwd.c, to testing monotone
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parents:
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246 #endif /* DROPBEAR_X11FWD */