Mercurial > dropbear
annotate cli-runopts.c @ 225:ca7e76d981d9 agent-client
- progress towards client agent forwarding
(incomplete and does not compile)
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 18 Jul 2005 14:32:52 +0000 |
parents | aad4b3f58556 |
children | 79bf1023cf11 |
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(); |
36 static void parsehostname(char* userhostarg); | |
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37 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 38 static void loadidentityfile(const char* filename); |
39 #endif | |
64 | 40 #ifdef ENABLE_CLI_ANYTCPFWD |
41 static void addforward(char* str, struct TCPFwdList** fwdlist); | |
42 #endif | |
39
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43 |
47 | 44 static void printhelp() { |
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45 |
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46 fprintf(stderr, "Dropbear client v%s\n" |
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47 "Usage: %s [options] [user@]host\n" |
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48 "Options are:\n" |
47 | 49 "-p <remoteport>\n" |
56
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50 "-t Allocate a pty\n" |
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51 "-T Don't allocate a pty\n" |
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52 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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53 "-i <identityfile> (multiple allowed)\n" |
47 | 54 #endif |
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55 #ifdef ENABLE_CLI_AGENTFWD |
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56 "-A Enable agent auth forwarding\n" |
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57 #endif |
64 | 58 #ifdef ENABLE_CLI_LOCALTCPFWD |
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59 "-L <listenport:remotehost:remoteport> Local port forwarding\n" |
62 | 60 #endif |
64 | 61 #ifdef ENABLE_CLI_REMOTETCPFWD |
62 | 62 "-R <listenport:remotehost:remoteport> Remote port forwarding\n" |
63 #endif | |
66
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64 "-l <username>\n" |
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65 #ifdef DEBUG_TRACE |
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66 "-v verbose\n" |
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67 #endif |
47 | 68 ,DROPBEAR_VERSION, cli_opts.progname); |
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69 } |
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70 |
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71 void cli_getopts(int argc, char ** argv) { |
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72 |
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73 unsigned int i, j; |
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74 char ** next = 0; |
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75 unsigned int cmdlen; |
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76 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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77 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
47 | 78 #endif |
64 | 79 #ifdef ENABLE_CLI_LOCALTCPFWD |
62 | 80 int nextislocal = 0; |
81 #endif | |
64 | 82 #ifdef ENABLE_CLI_REMOTETCPFWD |
62 | 83 int nextisremote = 0; |
84 #endif | |
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85 char* dummy = NULL; /* Not used for anything real */ |
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86 |
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87 /* see printhelp() for options */ |
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88 cli_opts.progname = argv[0]; |
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89 cli_opts.remotehost = NULL; |
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90 cli_opts.remoteport = NULL; |
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91 cli_opts.username = NULL; |
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92 cli_opts.cmd = NULL; |
47 | 93 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
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94 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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95 cli_opts.privkeys = NULL; |
47 | 96 #endif |
64 | 97 #ifdef ENABLE_CLI_LOCALTCPFWD |
98 cli_opts.localfwds = NULL; | |
62 | 99 #endif |
64 | 100 #ifdef ENABLE_CLI_REMOTETCPFWD |
101 cli_opts.remotefwds = NULL; | |
62 | 102 #endif |
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103 #ifdef ENABLE_CLI_AGENTFWD |
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104 cli_opts.agent_fwd = 0; |
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105 cli_opts.agent_keys_loaded = 0; |
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106 #endif |
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107 opts.nolocaltcp = 0; |
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108 opts.noremotetcp = 0; |
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109 /* not yet |
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110 opts.ipv4 = 1; |
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111 opts.ipv6 = 1; |
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112 */ |
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113 |
47 | 114 /* Iterate all the arguments */ |
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115 for (i = 1; i < (unsigned int)argc; i++) { |
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116 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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117 if (nextiskey) { |
47 | 118 /* Load a hostkey since the previous argument was "-i" */ |
119 loadidentityfile(argv[i]); | |
120 nextiskey = 0; | |
121 continue; | |
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122 } |
47 | 123 #endif |
64 | 124 #ifdef ENABLE_CLI_REMOTETCPFWD |
125 if (nextisremote) { | |
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126 TRACE(("nextisremote true")) |
64 | 127 addforward(argv[i], &cli_opts.remotefwds); |
128 nextisremote = 0; | |
129 continue; | |
130 } | |
131 #endif | |
132 #ifdef ENABLE_CLI_LOCALTCPFWD | |
133 if (nextislocal) { | |
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134 TRACE(("nextislocal true")) |
64 | 135 addforward(argv[i], &cli_opts.localfwds); |
136 nextislocal = 0; | |
137 continue; | |
138 } | |
139 #endif | |
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140 if (next) { |
47 | 141 /* The previous flag set a value to assign */ |
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142 *next = argv[i]; |
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143 if (*next == NULL) { |
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144 dropbear_exit("Invalid null argument"); |
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145 } |
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146 next = NULL; |
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147 continue; |
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148 } |
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149 |
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150 if (argv[i][0] == '-') { |
47 | 151 /* A flag *waves* */ |
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152 |
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153 switch (argv[i][1]) { |
47 | 154 case 'p': /* remoteport */ |
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155 next = &cli_opts.remoteport; |
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156 break; |
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157 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 158 case 'i': /* an identityfile */ |
134 | 159 /* Keep scp happy when it changes "-i file" to "-ifile" */ |
160 if (strlen(argv[i]) > 2) { | |
161 loadidentityfile(&argv[i][2]); | |
162 } else { | |
163 nextiskey = 1; | |
164 } | |
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165 break; |
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166 #endif |
47 | 167 case 't': /* we want a pty */ |
168 cli_opts.wantpty = 1; | |
169 break; | |
170 case 'T': /* don't want a pty */ | |
171 cli_opts.wantpty = 0; | |
172 break; | |
64 | 173 #ifdef ENABLE_CLI_LOCALTCPFWD |
174 case 'L': | |
175 nextislocal = 1; | |
176 break; | |
177 #endif | |
178 #ifdef ENABLE_CLI_REMOTETCPFWD | |
179 case 'R': | |
180 nextisremote = 1; | |
181 break; | |
182 #endif | |
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183 case 'l': |
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184 next = &cli_opts.username; |
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185 break; |
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186 case 'h': |
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187 printhelp(); |
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188 exit(EXIT_SUCCESS); |
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189 break; |
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190 #ifdef ENABLE_CLI_AGENTFWD |
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191 case 'A': |
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192 cli_opts.agent_fwd = 1; |
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193 break; |
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194 #endif |
94
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195 #ifdef DEBUG_TRACE |
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196 case 'v': |
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197 debug_trace = 1; |
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198 break; |
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199 #endif |
66
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200 case 'F': |
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201 case 'e': |
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202 case 'c': |
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203 case 'm': |
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204 case 'D': |
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205 #ifndef ENABLE_CLI_REMOTETCPFWD |
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206 case 'R': |
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207 #endif |
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208 #ifndef ENABLE_CLI_LOCALTCPFWD |
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209 case 'L': |
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210 #endif |
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211 case 'o': |
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212 case 'b': |
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213 next = &dummy; |
39
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214 default: |
66
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215 fprintf(stderr, |
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216 "WARNING: Ignoring unknown argument '%s'\n", argv[i]); |
39
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217 break; |
46
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218 } /* Switch */ |
105 | 219 |
220 /* Now we handle args where they might be "-luser" (no spaces)*/ | |
221 if (next && strlen(argv[i]) > 2) { | |
222 *next = &argv[i][2]; | |
223 next = NULL; | |
224 } | |
46
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225 |
47 | 226 continue; /* next argument */ |
227 | |
46
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228 } else { |
165
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229 TRACE(("non-flag arg: '%s'", argv[i])) |
46
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230 |
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231 /* Either the hostname or commands */ |
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232 |
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233 if (cli_opts.remotehost == NULL) { |
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234 |
47 | 235 parsehostname(argv[i]); |
46
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236 |
47 | 237 } else { |
46
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238 |
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239 /* this is part of the commands to send - after this we |
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240 * don't parse any more options, and flags are sent as the |
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241 * command */ |
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242 cmdlen = 0; |
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243 for (j = i; j < (unsigned int)argc; j++) { |
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244 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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245 } |
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246 /* Allocate the space */ |
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247 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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248 cli_opts.cmd[0] = '\0'; |
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249 |
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250 /* Append all the bits */ |
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251 for (j = i; j < (unsigned int)argc; j++) { |
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252 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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253 strlcat(cli_opts.cmd, " ", cmdlen); |
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254 } |
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255 /* It'll be null-terminated here */ |
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256 |
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257 /* We've eaten all the options and flags */ |
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258 break; |
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259 } |
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260 } |
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261 } |
47 | 262 |
263 if (cli_opts.remotehost == NULL) { | |
66
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264 printhelp(); |
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265 exit(EXIT_FAILURE); |
47 | 266 } |
267 | |
268 if (cli_opts.remoteport == NULL) { | |
269 cli_opts.remoteport = "22"; | |
270 } | |
271 | |
272 /* If not explicitly specified with -t or -T, we don't want a pty if | |
273 * there's a command, but we do otherwise */ | |
274 if (cli_opts.wantpty == 9) { | |
275 if (cli_opts.cmd == NULL) { | |
276 cli_opts.wantpty = 1; | |
277 } else { | |
278 cli_opts.wantpty = 0; | |
279 } | |
280 } | |
39
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281 } |
47 | 282 |
68
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283 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 284 static void loadidentityfile(const char* filename) { |
285 | |
215
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286 struct SignKeyList * nextkey; |
47 | 287 sign_key *key; |
288 int keytype; | |
289 | |
290 key = new_sign_key(); | |
291 keytype = DROPBEAR_SIGNKEY_ANY; | |
292 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
293 | |
294 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
295 sign_key_free(key); | |
296 | |
297 } else { | |
298 | |
215
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299 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
47 | 300 nextkey->key = key; |
215
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301 nextkey->next = cli_opts.privkeys; |
47 | 302 nextkey->type = keytype; |
225
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303 nextkey->source = SIGNKEY_SOURCE_RAW_FILE; |
215
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304 cli_opts.privkeys = nextkey; |
47 | 305 } |
306 } | |
307 #endif | |
308 | |
309 | |
310 /* Parses a [user@]hostname argument. userhostarg is the argv[i] corresponding | |
311 * - note that it will be modified */ | |
64 | 312 static void parsehostname(char* orighostarg) { |
47 | 313 |
314 uid_t uid; | |
315 struct passwd *pw = NULL; | |
64 | 316 char *userhostarg = NULL; |
317 | |
318 /* We probably don't want to be editing argvs */ | |
319 userhostarg = m_strdup(orighostarg); | |
47 | 320 |
321 cli_opts.remotehost = strchr(userhostarg, '@'); | |
322 if (cli_opts.remotehost == NULL) { | |
323 /* no username portion, the cli-auth.c code can figure the | |
324 * local user's name */ | |
325 cli_opts.remotehost = userhostarg; | |
326 } else { | |
327 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
328 cli_opts.remotehost++; | |
329 cli_opts.username = userhostarg; | |
330 } | |
331 | |
332 if (cli_opts.username == NULL) { | |
333 uid = getuid(); | |
334 | |
335 pw = getpwuid(uid); | |
336 if (pw == NULL || pw->pw_name == NULL) { | |
337 dropbear_exit("Unknown own user"); | |
338 } | |
339 | |
340 cli_opts.username = m_strdup(pw->pw_name); | |
341 } | |
342 | |
343 if (cli_opts.remotehost[0] == '\0') { | |
344 dropbear_exit("Bad hostname"); | |
345 } | |
346 } | |
64 | 347 |
348 #ifdef ENABLE_CLI_ANYTCPFWD | |
349 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
350 * set, and add it to the forwarding list */ | |
351 static void addforward(char* origstr, struct TCPFwdList** fwdlist) { | |
352 | |
353 char * listenport = NULL; | |
354 char * connectport = NULL; | |
355 char * connectaddr = NULL; | |
356 struct TCPFwdList* newfwd = NULL; | |
357 char * str = NULL; | |
358 | |
165
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359 TRACE(("enter addforward")) |
64 | 360 |
361 /* We probably don't want to be editing argvs */ | |
362 str = m_strdup(origstr); | |
363 | |
364 listenport = str; | |
365 | |
366 connectaddr = strchr(str, ':'); | |
367 if (connectaddr == NULL) { | |
165
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368 TRACE(("connectaddr == NULL")) |
64 | 369 goto fail; |
370 } | |
371 | |
372 connectaddr[0] = '\0'; | |
373 connectaddr++; | |
374 | |
375 connectport = strchr(connectaddr, ':'); | |
376 if (connectport == NULL) { | |
165
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377 TRACE(("connectport == NULL")) |
64 | 378 goto fail; |
379 } | |
380 | |
381 connectport[0] = '\0'; | |
382 connectport++; | |
383 | |
384 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
385 | |
386 /* Now we check the ports - note that the port ints are unsigned, | |
387 * the check later only checks for >= MAX_PORT */ | |
388 newfwd->listenport = strtol(listenport, NULL, 10); | |
389 if (errno != 0) { | |
165
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390 TRACE(("bad listenport strtol")) |
64 | 391 goto fail; |
392 } | |
393 | |
394 newfwd->connectport = strtol(connectport, NULL, 10); | |
395 if (errno != 0) { | |
165
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396 TRACE(("bad connectport strtol")) |
64 | 397 goto fail; |
398 } | |
399 | |
400 newfwd->connectaddr = connectaddr; | |
401 | |
402 if (newfwd->listenport > 65535) { | |
165
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403 TRACE(("listenport > 65535")) |
64 | 404 goto badport; |
405 } | |
406 | |
407 if (newfwd->connectport > 65535) { | |
165
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408 TRACE(("connectport > 65535")) |
64 | 409 goto badport; |
410 } | |
411 | |
412 newfwd->next = *fwdlist; | |
413 *fwdlist = newfwd; | |
414 | |
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415 TRACE(("leave addforward: done")) |
64 | 416 return; |
417 | |
418 fail: | |
419 dropbear_exit("Bad TCP forward '%s'", origstr); | |
420 | |
421 badport: | |
422 dropbear_exit("Bad TCP port in '%s'", origstr); | |
423 } | |
424 #endif |