Mercurial > dropbear
annotate cli-runopts.c @ 546:568638be7203 agent-client
propagate from branch 'au.asn.ucc.matt.dropbear' (head 899a8851a5edf840b2f7925bcc26ffe99dcac54d)
to branch 'au.asn.ucc.matt.dropbear.cli-agent' (head 6bbab8364de17bd9ecb1dee5ffb796e48c0380d2)
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 01 Jul 2009 04:16:32 +0000 |
parents | d588e3ea557a 9e51707cd6f2 |
children | c3f2ec71e3d4 |
rev | line source |
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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 #include "runopts.h" |
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27 #include "signkey.h" |
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28 #include "buffer.h" |
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29 #include "dbutil.h" |
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30 #include "algo.h" |
64 | 31 #include "tcpfwd.h" |
39
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32 |
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33 cli_runopts cli_opts; /* GLOBAL */ |
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34 |
47 | 35 static void printhelp(); |
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36 static void parse_hostname(const char* orighostarg); |
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37 static void parse_multihop_hostname(const char* orighostarg, const char* argv0); |
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38 static void fill_own_user(); |
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39 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 40 static void loadidentityfile(const char* filename); |
41 #endif | |
64 | 42 #ifdef ENABLE_CLI_ANYTCPFWD |
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43 static void addforward(const char* str, struct TCPFwdList** fwdlist); |
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44 #endif |
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45 #ifdef ENABLE_CLI_NETCAT |
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46 static void add_netcat(const char *str); |
64 | 47 #endif |
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48 |
47 | 49 static void printhelp() { |
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50 |
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51 fprintf(stderr, "Dropbear client v%s\n" |
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52 #ifdef ENABLE_CLI_MULTIHOP |
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53 "Usage: %s [options] [user@]host[/port][,[user@]host/port],...] [command]\n" |
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54 #else |
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55 "Usage: %s [options] [user@]host[/port] [command]\n" |
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56 #endif |
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57 "Options are:\n" |
47 | 58 "-p <remoteport>\n" |
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59 "-l <username>\n" |
56
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60 "-t Allocate a pty\n" |
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61 "-T Don't allocate a pty\n" |
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62 "-N Don't run a remote command\n" |
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63 "-f Run in background after auth\n" |
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64 "-y Always accept remote host key if unknown\n" |
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65 "-s Request a subsystem (use for sftp)\n" |
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66 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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67 "-i <identityfile> (multiple allowed)\n" |
47 | 68 #endif |
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69 #ifdef ENABLE_CLI_AGENTFWD |
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70 "-A Enable agent auth forwarding\n" |
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71 #endif |
64 | 72 #ifdef ENABLE_CLI_LOCALTCPFWD |
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73 "-L <listenport:remotehost:remoteport> Local port forwarding\n" |
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74 "-g Allow remote hosts to connect to forwarded ports\n" |
62 | 75 #endif |
64 | 76 #ifdef ENABLE_CLI_REMOTETCPFWD |
62 | 77 "-R <listenport:remotehost:remoteport> Remote port forwarding\n" |
78 #endif | |
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79 "-W <receive_window_buffer> (default %d, larger may be faster, max 1MB)\n" |
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80 "-K <keepalive> (0 is never, default %d)\n" |
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81 "-I <idle_timeout> (0 is never, default %d)\n" |
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82 #ifdef ENABLE_CLI_NETCAT |
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83 "-B <endhost:endport> Netcat-alike forwarding\n" |
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84 #endif |
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85 #ifdef ENABLE_CLI_PROXYCMD |
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86 "-J <proxy_program> Use program pipe rather than TCP connection\n" |
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87 #endif |
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88 #ifdef DEBUG_TRACE |
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89 "-v verbose (compiled with DEBUG_TRACE)\n" |
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90 #endif |
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91 ,DROPBEAR_VERSION, cli_opts.progname, |
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92 DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT); |
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93 |
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94 } |
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95 |
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96 void cli_getopts(int argc, char ** argv) { |
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97 unsigned int i, j; |
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98 char ** next = 0; |
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99 unsigned int cmdlen; |
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100 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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101 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
47 | 102 #endif |
64 | 103 #ifdef ENABLE_CLI_LOCALTCPFWD |
62 | 104 int nextislocal = 0; |
105 #endif | |
64 | 106 #ifdef ENABLE_CLI_REMOTETCPFWD |
62 | 107 int nextisremote = 0; |
108 #endif | |
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109 #ifdef ENABLE_CLI_NETCAT |
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110 int nextisnetcat = 0; |
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111 #endif |
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112 char* dummy = NULL; /* Not used for anything real */ |
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113 |
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114 char* recv_window_arg = NULL; |
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115 char* keepalive_arg = NULL; |
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116 char* idle_timeout_arg = NULL; |
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117 char *host_arg = NULL; |
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118 |
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119 /* see printhelp() for options */ |
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120 cli_opts.progname = argv[0]; |
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121 cli_opts.remotehost = NULL; |
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122 cli_opts.remoteport = NULL; |
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123 cli_opts.username = NULL; |
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124 cli_opts.cmd = NULL; |
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125 cli_opts.no_cmd = 0; |
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126 cli_opts.backgrounded = 0; |
47 | 127 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
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128 cli_opts.always_accept_key = 0; |
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129 cli_opts.is_subsystem = 0; |
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130 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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131 cli_opts.privkeys = NULL; |
47 | 132 #endif |
64 | 133 #ifdef ENABLE_CLI_LOCALTCPFWD |
134 cli_opts.localfwds = NULL; | |
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135 opts.listen_fwd_all = 0; |
62 | 136 #endif |
64 | 137 #ifdef ENABLE_CLI_REMOTETCPFWD |
138 cli_opts.remotefwds = NULL; | |
62 | 139 #endif |
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140 #ifdef ENABLE_CLI_AGENTFWD |
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141 cli_opts.agent_fwd = 0; |
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142 cli_opts.agent_keys_loaded = 0; |
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143 #endif |
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144 #ifdef ENABLE_CLI_PROXYCMD |
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145 cli_opts.proxycmd = NULL; |
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146 #endif |
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147 /* not yet |
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148 opts.ipv4 = 1; |
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149 opts.ipv6 = 1; |
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150 */ |
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151 opts.recv_window = DEFAULT_RECV_WINDOW; |
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152 |
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153 fill_own_user(); |
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154 |
47 | 155 /* Iterate all the arguments */ |
46
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156 for (i = 1; i < (unsigned int)argc; i++) { |
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157 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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158 if (nextiskey) { |
47 | 159 /* Load a hostkey since the previous argument was "-i" */ |
160 loadidentityfile(argv[i]); | |
161 nextiskey = 0; | |
162 continue; | |
39
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163 } |
47 | 164 #endif |
64 | 165 #ifdef ENABLE_CLI_REMOTETCPFWD |
166 if (nextisremote) { | |
165
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167 TRACE(("nextisremote true")) |
64 | 168 addforward(argv[i], &cli_opts.remotefwds); |
169 nextisremote = 0; | |
170 continue; | |
171 } | |
172 #endif | |
173 #ifdef ENABLE_CLI_LOCALTCPFWD | |
174 if (nextislocal) { | |
165
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175 TRACE(("nextislocal true")) |
64 | 176 addforward(argv[i], &cli_opts.localfwds); |
177 nextislocal = 0; | |
178 continue; | |
179 } | |
180 #endif | |
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181 #ifdef ENABLE_CLI_NETCAT |
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182 if (nextisnetcat) { |
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183 TRACE(("nextisnetcat true")) |
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184 add_netcat(argv[i]); |
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185 nextisnetcat = 0; |
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186 continue; |
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187 } |
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188 #endif |
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189 if (next) { |
47 | 190 /* The previous flag set a value to assign */ |
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191 *next = argv[i]; |
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192 if (*next == NULL) { |
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193 dropbear_exit("Invalid null argument"); |
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194 } |
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195 next = NULL; |
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196 continue; |
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197 } |
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198 |
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199 if (argv[i][0] == '-') { |
47 | 200 /* A flag *waves* */ |
46
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201 |
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202 switch (argv[i][1]) { |
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203 case 'y': /* always accept the remote hostkey */ |
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204 cli_opts.always_accept_key = 1; |
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205 break; |
47 | 206 case 'p': /* remoteport */ |
46
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207 next = &cli_opts.remoteport; |
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208 break; |
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209 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 210 case 'i': /* an identityfile */ |
134 | 211 /* Keep scp happy when it changes "-i file" to "-ifile" */ |
212 if (strlen(argv[i]) > 2) { | |
213 loadidentityfile(&argv[i][2]); | |
214 } else { | |
215 nextiskey = 1; | |
216 } | |
39
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217 break; |
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218 #endif |
47 | 219 case 't': /* we want a pty */ |
220 cli_opts.wantpty = 1; | |
221 break; | |
222 case 'T': /* don't want a pty */ | |
223 cli_opts.wantpty = 0; | |
224 break; | |
325
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225 case 'N': |
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226 cli_opts.no_cmd = 1; |
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|
227 break; |
326
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|
228 case 'f': |
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|
229 cli_opts.backgrounded = 1; |
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230 break; |
497
ae600f1eef81
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|
231 case 's': |
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232 cli_opts.is_subsystem = 1; |
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233 break; |
64 | 234 #ifdef ENABLE_CLI_LOCALTCPFWD |
235 case 'L': | |
236 nextislocal = 1; | |
237 break; | |
258
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* add -g (dbclient) and -a (dropbear) options for allowing non-local
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238 case 'g': |
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239 opts.listen_fwd_all = 1; |
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240 break; |
64 | 241 #endif |
242 #ifdef ENABLE_CLI_REMOTETCPFWD | |
243 case 'R': | |
244 nextisremote = 1; | |
245 break; | |
246 #endif | |
485
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|
247 #ifdef ENABLE_CLI_NETCAT |
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248 case 'B': |
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249 nextisnetcat = 1; |
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250 break; |
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251 #endif |
479
e3db1f7a2e43
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252 #ifdef ENABLE_CLI_PROXYCMD |
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253 case 'J': |
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|
254 next = &cli_opts.proxycmd; |
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|
255 break; |
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|
256 #endif |
66
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257 case 'l': |
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|
258 next = &cli_opts.username; |
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259 break; |
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|
260 case 'h': |
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|
261 printhelp(); |
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|
262 exit(EXIT_SUCCESS); |
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|
263 break; |
442
d82a2a44c684
Add -u option to specify /dev/urandom instead
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418
diff
changeset
|
264 case 'u': |
446
2cd2edfa11ee
Just use /dev/urandom since that's what everyone ends up using anyway.
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442
diff
changeset
|
265 /* backwards compatibility with old urandom option */ |
442
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diff
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|
266 break; |
449
3e6c536bc023
Add -W <windowsize> argument and document it.
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|
267 case 'W': |
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|
268 next = &recv_window_arg; |
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|
269 break; |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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diff
changeset
|
270 case 'K': |
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|
271 next = &keepalive_arg; |
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|
272 break; |
513
a3748e54273c
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|
273 case 'I': |
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|
274 next = &idle_timeout_arg; |
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|
275 break; |
225
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276 #ifdef ENABLE_CLI_AGENTFWD |
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|
277 case 'A': |
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|
278 cli_opts.agent_fwd = 1; |
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|
279 break; |
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|
280 #endif |
94
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|
281 #ifdef DEBUG_TRACE |
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|
282 case 'v': |
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|
283 debug_trace = 1; |
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|
284 break; |
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|
285 #endif |
66
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286 case 'F': |
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|
287 case 'e': |
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|
288 case 'c': |
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|
289 case 'm': |
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|
290 case 'D': |
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|
291 #ifndef ENABLE_CLI_REMOTETCPFWD |
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292 case 'R': |
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293 #endif |
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|
294 #ifndef ENABLE_CLI_LOCALTCPFWD |
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295 case 'L': |
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|
296 #endif |
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|
297 case 'o': |
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298 case 'b': |
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diff
changeset
|
299 next = &dummy; |
39
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|
300 default: |
66
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301 fprintf(stderr, |
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302 "WARNING: Ignoring unknown argument '%s'\n", argv[i]); |
39
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303 break; |
46
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304 } /* Switch */ |
105 | 305 |
306 /* Now we handle args where they might be "-luser" (no spaces)*/ | |
307 if (next && strlen(argv[i]) > 2) { | |
308 *next = &argv[i][2]; | |
309 next = NULL; | |
310 } | |
46
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311 |
47 | 312 continue; /* next argument */ |
313 | |
46
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314 } else { |
165
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315 TRACE(("non-flag arg: '%s'", argv[i])) |
46
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316 |
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317 /* Either the hostname or commands */ |
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318 |
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319 if (host_arg == NULL) { |
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320 host_arg = argv[i]; |
47 | 321 } else { |
46
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322 |
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323 /* this is part of the commands to send - after this we |
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324 * don't parse any more options, and flags are sent as the |
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325 * command */ |
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326 cmdlen = 0; |
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327 for (j = i; j < (unsigned int)argc; j++) { |
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328 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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329 } |
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330 /* Allocate the space */ |
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331 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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332 cli_opts.cmd[0] = '\0'; |
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333 |
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334 /* Append all the bits */ |
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335 for (j = i; j < (unsigned int)argc; j++) { |
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336 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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337 strlcat(cli_opts.cmd, " ", cmdlen); |
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338 } |
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339 /* It'll be null-terminated here */ |
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340 |
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341 /* We've eaten all the options and flags */ |
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342 break; |
39
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343 } |
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344 } |
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345 } |
47 | 346 |
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347 /* And now a few sanity checks and setup */ |
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348 |
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349 if (host_arg == NULL) { |
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350 printhelp(); |
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351 exit(EXIT_FAILURE); |
47 | 352 } |
353 | |
354 if (cli_opts.remoteport == NULL) { | |
355 cli_opts.remoteport = "22"; | |
356 } | |
357 | |
358 /* If not explicitly specified with -t or -T, we don't want a pty if | |
359 * there's a command, but we do otherwise */ | |
360 if (cli_opts.wantpty == 9) { | |
361 if (cli_opts.cmd == NULL) { | |
362 cli_opts.wantpty = 1; | |
363 } else { | |
364 cli_opts.wantpty = 0; | |
365 } | |
366 } | |
326
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367 |
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368 if (cli_opts.backgrounded && cli_opts.cmd == NULL |
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369 && cli_opts.no_cmd == 0) { |
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370 dropbear_exit("command required for -f"); |
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371 } |
449
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372 |
483
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373 if (recv_window_arg) { |
449
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374 opts.recv_window = atol(recv_window_arg); |
483
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375 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
449
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376 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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377 } |
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378 } |
454
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379 if (keepalive_arg) { |
492
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380 if (m_str_to_uint(keepalive_arg, &opts.keepalive_secs) == DROPBEAR_FAILURE) { |
454
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381 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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382 } |
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383 } |
487
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384 |
513
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385 if (idle_timeout_arg) { |
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386 if (m_str_to_uint(idle_timeout_arg, &opts.idle_timeout_secs) == DROPBEAR_FAILURE) { |
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387 dropbear_exit("Bad idle_timeout '%s'", idle_timeout_arg); |
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388 } |
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389 } |
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390 |
487
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391 #ifdef ENABLE_CLI_NETCAT |
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392 if (cli_opts.cmd && cli_opts.netcat_host) { |
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393 dropbear_log(LOG_INFO, "Ignoring command '%s' in netcat mode", cli_opts.cmd); |
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394 } |
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395 #endif |
544
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396 |
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397 /* The hostname gets set up last, since |
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398 * in multi-hop mode it will require knowledge |
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399 * of other flags such as -i */ |
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400 #ifdef ENABLE_CLI_MULTIHOP |
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401 parse_multihop_hostname(host_arg, argv[0]); |
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402 #else |
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403 parse_hostname(host_arg); |
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404 #endif |
39
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405 } |
47 | 406 |
68
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cleaning up the pubkey defines
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diff
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|
407 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 408 static void loadidentityfile(const char* filename) { |
409 | |
215
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410 struct SignKeyList * nextkey; |
47 | 411 sign_key *key; |
412 int keytype; | |
413 | |
414 key = new_sign_key(); | |
415 keytype = DROPBEAR_SIGNKEY_ANY; | |
416 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
417 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
418 sign_key_free(key); | |
419 } else { | |
215
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420 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
47 | 421 nextkey->key = key; |
544
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422 nextkey->filename = m_strdup(filename); |
215
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423 nextkey->next = cli_opts.privkeys; |
47 | 424 nextkey->type = keytype; |
225
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diff
changeset
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425 nextkey->source = SIGNKEY_SOURCE_RAW_FILE; |
215
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426 cli_opts.privkeys = nextkey; |
47 | 427 } |
428 } | |
429 #endif | |
430 | |
487
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431 #ifdef ENABLE_CLI_MULTIHOP |
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432 |
544
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|
433 static char* |
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|
434 multihop_passthrough_args() { |
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435 char *ret; |
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|
436 int total; |
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|
437 unsigned int len = 0; |
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|
438 struct SignKeyList *nextkey; |
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|
439 /* Fill out -i and -W options that make sense for all |
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440 * the intermediate processes */ |
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|
441 for (nextkey = cli_opts.privkeys; nextkey; nextkey = nextkey->next) |
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|
442 { |
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|
443 len += 3 + strlen(nextkey->filename); |
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|
444 } |
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|
445 len += 20; // space for -W <size>, terminator. |
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|
446 ret = m_malloc(len); |
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|
447 total = 0; |
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changeset
|
448 |
9e51707cd6f2
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changeset
|
449 if (opts.recv_window != DEFAULT_RECV_WINDOW) |
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|
450 { |
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changeset
|
451 int written = snprintf(ret+total, len-total, "-W %d", opts.recv_window); |
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452 total += written; |
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|
453 } |
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parents:
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diff
changeset
|
454 |
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parents:
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changeset
|
455 for (nextkey = cli_opts.privkeys; nextkey; nextkey = nextkey->next) |
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parents:
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diff
changeset
|
456 { |
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parents:
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diff
changeset
|
457 const size_t size = len - total; |
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|
458 int written = snprintf(ret+total, size, "-i %s", nextkey->filename); |
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parents:
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diff
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|
459 dropbear_assert(written < size); |
9e51707cd6f2
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diff
changeset
|
460 total += written; |
9e51707cd6f2
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parents:
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diff
changeset
|
461 } |
9e51707cd6f2
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parents:
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diff
changeset
|
462 |
9e51707cd6f2
- Make -i and -W pass through multihop arguments
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parents:
541
diff
changeset
|
463 return ret; |
9e51707cd6f2
- Make -i and -W pass through multihop arguments
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parents:
541
diff
changeset
|
464 } |
9e51707cd6f2
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parents:
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diff
changeset
|
465 |
489
79c657a673ec
- Allow specifying a port with host/port.
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parents:
487
diff
changeset
|
466 /* Sets up 'onion-forwarding' connections. This will spawn |
79c657a673ec
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parents:
487
diff
changeset
|
467 * a separate dbclient process for each hop. |
487
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486
diff
changeset
|
468 * As an example, if the cmdline is |
2e17f82a7330
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486
diff
changeset
|
469 * dbclient wrt,madako,canyons |
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diff
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|
470 * then we want to run: |
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486
diff
changeset
|
471 * dbclient -J "dbclient -B canyons:22 wrt,madako" canyons |
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|
472 * and then the inner dbclient will recursively run: |
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diff
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|
473 * dbclient -J "dbclient -B madako:22 wrt" madako |
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|
474 * etc for as many hosts as we want. |
489
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- Allow specifying a port with host/port.
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487
diff
changeset
|
475 * |
79c657a673ec
- Allow specifying a port with host/port.
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parents:
487
diff
changeset
|
476 * Ports for hosts can be specified as host/port. |
487
2e17f82a7330
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diff
changeset
|
477 */ |
489
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- Allow specifying a port with host/port.
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parents:
487
diff
changeset
|
478 static void parse_multihop_hostname(const char* orighostarg, const char* argv0) { |
487
2e17f82a7330
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|
479 char *userhostarg = NULL; |
544
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|
480 char *hostbuf = NULL; |
487
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|
481 char *last_hop = NULL;; |
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|
482 char *remainder = NULL; |
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diff
changeset
|
483 |
494
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
484 /* both scp and rsync parse a user@host argument |
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
485 * and turn it into "-l user host". This breaks |
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
486 * for our multihop syntax, so we suture it back together. |
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
487 * This will break usernames that have both '@' and ',' in them, |
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
488 * though that should be fairly uncommon. */ |
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
489 if (cli_opts.username |
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
490 && strchr(cli_opts.username, ',') |
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
491 && strchr(cli_opts.username, '@')) { |
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
492 unsigned int len = strlen(orighostarg) + strlen(cli_opts.username) + 2; |
544
9e51707cd6f2
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diff
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|
493 hostbuf = m_malloc(len); |
9e51707cd6f2
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diff
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|
494 snprintf(hostbuf, len, "%s@%s", cli_opts.username, orighostarg); |
494
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
495 } else { |
544
9e51707cd6f2
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changeset
|
496 hostbuf = m_strdup(orighostarg); |
494
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
Matt Johnston <matt@ucc.asn.au>
parents:
492
diff
changeset
|
497 } |
544
9e51707cd6f2
- Make -i and -W pass through multihop arguments
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diff
changeset
|
498 userhostarg = hostbuf; |
487
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diff
changeset
|
499 |
2e17f82a7330
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diff
changeset
|
500 last_hop = strrchr(userhostarg, ','); |
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diff
changeset
|
501 if (last_hop) { |
2e17f82a7330
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diff
changeset
|
502 if (last_hop == userhostarg) { |
2e17f82a7330
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486
diff
changeset
|
503 dropbear_exit("Bad multi-hop hostnames"); |
2e17f82a7330
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486
diff
changeset
|
504 } |
2e17f82a7330
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diff
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|
505 *last_hop = '\0'; |
2e17f82a7330
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diff
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|
506 last_hop++; |
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diff
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|
507 remainder = userhostarg; |
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diff
changeset
|
508 userhostarg = last_hop; |
2e17f82a7330
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486
diff
changeset
|
509 } |
2e17f82a7330
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parents:
486
diff
changeset
|
510 |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
511 parse_hostname(userhostarg); |
487
2e17f82a7330
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parents:
486
diff
changeset
|
512 |
2e17f82a7330
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486
diff
changeset
|
513 if (last_hop) { |
2e17f82a7330
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diff
changeset
|
514 /* Set up the proxycmd */ |
2e17f82a7330
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parents:
486
diff
changeset
|
515 unsigned int cmd_len = 0; |
544
9e51707cd6f2
- Make -i and -W pass through multihop arguments
Matt Johnston <matt@ucc.asn.au>
parents:
541
diff
changeset
|
516 char *passthrough_args = multihop_passthrough_args(); |
487
2e17f82a7330
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parents:
486
diff
changeset
|
517 if (cli_opts.proxycmd) { |
2e17f82a7330
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diff
changeset
|
518 dropbear_exit("-J can't be used with multihop mode"); |
2e17f82a7330
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parents:
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diff
changeset
|
519 } |
2e17f82a7330
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parents:
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diff
changeset
|
520 if (cli_opts.remoteport == NULL) { |
2e17f82a7330
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parents:
486
diff
changeset
|
521 cli_opts.remoteport = "22"; |
2e17f82a7330
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diff
changeset
|
522 } |
544
9e51707cd6f2
- Make -i and -W pass through multihop arguments
Matt Johnston <matt@ucc.asn.au>
parents:
541
diff
changeset
|
523 cmd_len = strlen(argv0) + strlen(remainder) |
487
2e17f82a7330
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parents:
486
diff
changeset
|
524 + strlen(cli_opts.remotehost) + strlen(cli_opts.remoteport) |
544
9e51707cd6f2
- Make -i and -W pass through multihop arguments
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parents:
541
diff
changeset
|
525 + strlen(passthrough_args) |
9e51707cd6f2
- Make -i and -W pass through multihop arguments
Matt Johnston <matt@ucc.asn.au>
parents:
541
diff
changeset
|
526 + 30; |
487
2e17f82a7330
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parents:
486
diff
changeset
|
527 cli_opts.proxycmd = m_malloc(cmd_len); |
544
9e51707cd6f2
- Make -i and -W pass through multihop arguments
Matt Johnston <matt@ucc.asn.au>
parents:
541
diff
changeset
|
528 snprintf(cli_opts.proxycmd, cmd_len, "%s -B %s:%s %s %s", |
9e51707cd6f2
- Make -i and -W pass through multihop arguments
Matt Johnston <matt@ucc.asn.au>
parents:
541
diff
changeset
|
529 argv0, cli_opts.remotehost, cli_opts.remoteport, |
9e51707cd6f2
- Make -i and -W pass through multihop arguments
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parents:
541
diff
changeset
|
530 passthrough_args, remainder); |
9e51707cd6f2
- Make -i and -W pass through multihop arguments
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parents:
541
diff
changeset
|
531 m_free(passthrough_args); |
487
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
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parents:
486
diff
changeset
|
532 } |
544
9e51707cd6f2
- Make -i and -W pass through multihop arguments
Matt Johnston <matt@ucc.asn.au>
parents:
541
diff
changeset
|
533 m_free(hostbuf); |
487
2e17f82a7330
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parents:
486
diff
changeset
|
534 } |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
535 #endif /* !ENABLE_CLI_MULTIHOP */ |
47 | 536 |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
537 /* Parses a [user@]hostname[/port] argument. */ |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
538 static void parse_hostname(const char* orighostarg) { |
64 | 539 char *userhostarg = NULL; |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
540 char *port = NULL; |
64 | 541 |
542 userhostarg = m_strdup(orighostarg); | |
47 | 543 |
544 cli_opts.remotehost = strchr(userhostarg, '@'); | |
545 if (cli_opts.remotehost == NULL) { | |
546 /* no username portion, the cli-auth.c code can figure the | |
547 * local user's name */ | |
548 cli_opts.remotehost = userhostarg; | |
549 } else { | |
550 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
551 cli_opts.remotehost++; | |
552 cli_opts.username = userhostarg; | |
553 } | |
554 | |
555 if (cli_opts.username == NULL) { | |
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
556 cli_opts.username = m_strdup(cli_opts.own_user); |
47 | 557 } |
558 | |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
559 port = strchr(cli_opts.remotehost, '/'); |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
560 if (port) { |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
561 *port = '\0'; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
562 cli_opts.remoteport = port+1; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
563 } |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
564 |
47 | 565 if (cli_opts.remotehost[0] == '\0') { |
566 dropbear_exit("Bad hostname"); | |
567 } | |
568 } | |
64 | 569 |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
570 #ifdef ENABLE_CLI_NETCAT |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
571 static void add_netcat(const char* origstr) { |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
572 char *portstr = NULL; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
573 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
574 char * str = m_strdup(origstr); |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
575 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
576 portstr = strchr(str, ':'); |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
577 if (portstr == NULL) { |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
578 TRACE(("No netcat port")) |
12d845ab7b5f
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Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
579 goto fail; |
12d845ab7b5f
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Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
580 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
581 *portstr = '\0'; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
582 portstr++; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
583 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
584 if (strchr(portstr, ':')) { |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
585 TRACE(("Multiple netcat colons")) |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
586 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
587 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
588 |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
589 if (m_str_to_uint(portstr, &cli_opts.netcat_port) == DROPBEAR_FAILURE) { |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
590 TRACE(("bad netcat port")) |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
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parents:
459
diff
changeset
|
591 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
592 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
593 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
594 if (cli_opts.netcat_port > 65535) { |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
595 TRACE(("too large netcat port")) |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
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parents:
459
diff
changeset
|
596 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
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597 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
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parents:
459
diff
changeset
|
598 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
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599 cli_opts.netcat_host = str; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
600 return; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
601 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
602 fail: |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
603 dropbear_exit("Bad netcat endpoint '%s'", origstr); |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
604 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
605 #endif |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
606 |
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
607 static void fill_own_user() { |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
608 uid_t uid; |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
609 struct passwd *pw = NULL; |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
610 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
611 uid = getuid(); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
612 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
613 pw = getpwuid(uid); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
614 if (pw == NULL || pw->pw_name == NULL) { |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
615 dropbear_exit("Unknown own user"); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
616 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
617 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
618 cli_opts.own_user = m_strdup(pw->pw_name); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
619 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
620 |
64 | 621 #ifdef ENABLE_CLI_ANYTCPFWD |
622 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
623 * set, and add it to the forwarding list */ | |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
624 static void addforward(const char* origstr, struct TCPFwdList** fwdlist) { |
64 | 625 |
626 char * listenport = NULL; | |
627 char * connectport = NULL; | |
628 char * connectaddr = NULL; | |
629 struct TCPFwdList* newfwd = NULL; | |
630 char * str = NULL; | |
631 | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
632 TRACE(("enter addforward")) |
64 | 633 |
411
253958302381
Revert bogus fix, make a note that the var is meant to 'leak'
Matt Johnston <matt@ucc.asn.au>
parents:
407
diff
changeset
|
634 /* We need to split the original argument up. This var |
253958302381
Revert bogus fix, make a note that the var is meant to 'leak'
Matt Johnston <matt@ucc.asn.au>
parents:
407
diff
changeset
|
635 is never free()d. */ |
64 | 636 str = m_strdup(origstr); |
637 | |
638 listenport = str; | |
639 | |
640 connectaddr = strchr(str, ':'); | |
641 if (connectaddr == NULL) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
642 TRACE(("connectaddr == NULL")) |
64 | 643 goto fail; |
644 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
645 *connectaddr = '\0'; |
64 | 646 connectaddr++; |
647 | |
648 connectport = strchr(connectaddr, ':'); | |
649 if (connectport == NULL) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
650 TRACE(("connectport == NULL")) |
64 | 651 goto fail; |
652 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
653 *connectport = '\0'; |
64 | 654 connectport++; |
655 | |
656 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
657 | |
658 /* Now we check the ports - note that the port ints are unsigned, | |
659 * the check later only checks for >= MAX_PORT */ | |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
660 if (m_str_to_uint(listenport, &newfwd->listenport) == DROPBEAR_FAILURE) { |
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
661 TRACE(("bad listenport strtoul")) |
64 | 662 goto fail; |
663 } | |
664 | |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
665 if (m_str_to_uint(connectport, &newfwd->connectport) == DROPBEAR_FAILURE) { |
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
666 TRACE(("bad connectport strtoul")) |
64 | 667 goto fail; |
668 } | |
669 | |
670 newfwd->connectaddr = connectaddr; | |
671 | |
672 if (newfwd->listenport > 65535) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
673 TRACE(("listenport > 65535")) |
64 | 674 goto badport; |
675 } | |
676 | |
677 if (newfwd->connectport > 65535) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
678 TRACE(("connectport > 65535")) |
64 | 679 goto badport; |
680 } | |
681 | |
505
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
497
diff
changeset
|
682 newfwd->have_reply = 0; |
64 | 683 newfwd->next = *fwdlist; |
684 *fwdlist = newfwd; | |
685 | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
686 TRACE(("leave addforward: done")) |
64 | 687 return; |
688 | |
689 fail: | |
690 dropbear_exit("Bad TCP forward '%s'", origstr); | |
691 | |
692 badport: | |
693 dropbear_exit("Bad TCP port in '%s'", origstr); | |
694 } | |
695 #endif |