Mercurial > dropbear
annotate cli-runopts.c @ 426:695413c59b6a
Don't erase every buffer, it's too time consuming.
On systems where it matters encrypted swap should be enabled anyway.
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Mon, 12 Feb 2007 10:44:47 +0000 |
| parents | ab57ba0cb667 |
| children | d82a2a44c684 |
| 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" |
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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 | |
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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 [command]\n" |
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48 "Options are:\n" |
| 47 | 49 "-p <remoteport>\n" |
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50 "-l <username>\n" |
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51 "-t Allocate a pty\n" |
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52 "-T Don't allocate a pty\n" |
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53 "-N Don't run a remote command\n" |
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54 "-f Run in background after auth\n" |
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55 "-y Always accept remote host key if unknown\n" |
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56 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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57 "-i <identityfile> (multiple allowed)\n" |
| 47 | 58 #endif |
| 64 | 59 #ifdef ENABLE_CLI_LOCALTCPFWD |
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60 "-L <listenport:remotehost:remoteport> Local port forwarding\n" |
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61 "-g Allow remote hosts to connect to forwarded ports\n" |
| 62 | 62 #endif |
| 64 | 63 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 62 | 64 "-R <listenport:remotehost:remoteport> Remote port forwarding\n" |
| 65 #endif | |
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66 #ifdef DEBUG_TRACE |
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67 "-v verbose\n" |
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68 #endif |
| 47 | 69 ,DROPBEAR_VERSION, cli_opts.progname); |
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70 } |
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71 |
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72 void cli_getopts(int argc, char ** argv) { |
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73 |
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74 unsigned int i, j; |
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75 char ** next = 0; |
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76 unsigned int cmdlen; |
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77 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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78 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
| 47 | 79 #endif |
| 64 | 80 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 62 | 81 int nextislocal = 0; |
| 82 #endif | |
| 64 | 83 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 62 | 84 int nextisremote = 0; |
| 85 #endif | |
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86 char* dummy = NULL; /* Not used for anything real */ |
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87 |
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88 /* see printhelp() for options */ |
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89 cli_opts.progname = argv[0]; |
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90 cli_opts.remotehost = NULL; |
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91 cli_opts.remoteport = NULL; |
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92 cli_opts.username = NULL; |
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93 cli_opts.cmd = NULL; |
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94 cli_opts.no_cmd = 0; |
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95 cli_opts.backgrounded = 0; |
| 47 | 96 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
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97 cli_opts.always_accept_key = 0; |
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98 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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99 cli_opts.privkeys = NULL; |
| 47 | 100 #endif |
| 64 | 101 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 102 cli_opts.localfwds = NULL; | |
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103 opts.listen_fwd_all = 0; |
| 62 | 104 #endif |
| 64 | 105 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 106 cli_opts.remotefwds = NULL; | |
| 62 | 107 #endif |
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108 /* not yet |
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109 opts.ipv4 = 1; |
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110 opts.ipv6 = 1; |
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111 */ |
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112 |
| 47 | 113 /* Iterate all the arguments */ |
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114 for (i = 1; i < (unsigned int)argc; i++) { |
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115 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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116 if (nextiskey) { |
| 47 | 117 /* Load a hostkey since the previous argument was "-i" */ |
| 118 loadidentityfile(argv[i]); | |
| 119 nextiskey = 0; | |
| 120 continue; | |
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121 } |
| 47 | 122 #endif |
| 64 | 123 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 124 if (nextisremote) { | |
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125 TRACE(("nextisremote true")) |
| 64 | 126 addforward(argv[i], &cli_opts.remotefwds); |
| 127 nextisremote = 0; | |
| 128 continue; | |
| 129 } | |
| 130 #endif | |
| 131 #ifdef ENABLE_CLI_LOCALTCPFWD | |
| 132 if (nextislocal) { | |
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133 TRACE(("nextislocal true")) |
| 64 | 134 addforward(argv[i], &cli_opts.localfwds); |
| 135 nextislocal = 0; | |
| 136 continue; | |
| 137 } | |
| 138 #endif | |
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139 if (next) { |
| 47 | 140 /* The previous flag set a value to assign */ |
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141 *next = argv[i]; |
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142 if (*next == NULL) { |
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143 dropbear_exit("Invalid null argument"); |
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144 } |
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145 next = NULL; |
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146 continue; |
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147 } |
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148 |
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149 if (argv[i][0] == '-') { |
| 47 | 150 /* A flag *waves* */ |
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151 |
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152 switch (argv[i][1]) { |
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153 case 'y': /* always accept the remote hostkey */ |
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154 cli_opts.always_accept_key = 1; |
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155 break; |
| 47 | 156 case 'p': /* remoteport */ |
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157 next = &cli_opts.remoteport; |
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158 break; |
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159 #ifdef ENABLE_CLI_PUBKEY_AUTH |
| 47 | 160 case 'i': /* an identityfile */ |
| 134 | 161 /* Keep scp happy when it changes "-i file" to "-ifile" */ |
| 162 if (strlen(argv[i]) > 2) { | |
| 163 loadidentityfile(&argv[i][2]); | |
| 164 } else { | |
| 165 nextiskey = 1; | |
| 166 } | |
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167 break; |
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168 #endif |
| 47 | 169 case 't': /* we want a pty */ |
| 170 cli_opts.wantpty = 1; | |
| 171 break; | |
| 172 case 'T': /* don't want a pty */ | |
| 173 cli_opts.wantpty = 0; | |
| 174 break; | |
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175 case 'N': |
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258
diff
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|
176 cli_opts.no_cmd = 1; |
|
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diff
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|
177 break; |
|
326
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325
diff
changeset
|
178 case 'f': |
|
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diff
changeset
|
179 cli_opts.backgrounded = 1; |
|
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changeset
|
180 break; |
| 64 | 181 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 182 case 'L': | |
| 183 nextislocal = 1; | |
| 184 break; | |
|
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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215
diff
changeset
|
185 case 'g': |
|
306499676384
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215
diff
changeset
|
186 opts.listen_fwd_all = 1; |
|
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|
187 break; |
| 64 | 188 #endif |
| 189 #ifdef ENABLE_CLI_REMOTETCPFWD | |
| 190 case 'R': | |
| 191 nextisremote = 1; | |
| 192 break; | |
| 193 #endif | |
|
66
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64
diff
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|
194 case 'l': |
|
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|
195 next = &cli_opts.username; |
|
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196 break; |
|
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|
197 case 'h': |
|
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|
198 printhelp(); |
|
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|
199 exit(EXIT_SUCCESS); |
|
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200 break; |
|
94
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DEBUG_TRACE now only triggers with -v on the cmdline
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changeset
|
201 #ifdef DEBUG_TRACE |
|
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|
202 case 'v': |
|
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|
203 debug_trace = 1; |
|
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|
204 break; |
|
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|
205 #endif |
|
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|
206 case 'F': |
|
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|
207 case 'e': |
|
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|
208 case 'c': |
|
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|
209 case 'm': |
|
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64
diff
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|
210 case 'D': |
|
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|
211 #ifndef ENABLE_CLI_REMOTETCPFWD |
|
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|
212 case 'R': |
|
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|
213 #endif |
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|
214 #ifndef ENABLE_CLI_LOCALTCPFWD |
|
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215 case 'L': |
|
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|
216 #endif |
|
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diff
changeset
|
217 case 'o': |
|
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|
218 case 'b': |
|
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|
219 next = &dummy; |
|
39
0883c0906870
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|
220 default: |
|
66
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|
221 fprintf(stderr, |
|
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222 "WARNING: Ignoring unknown argument '%s'\n", argv[i]); |
|
39
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223 break; |
|
46
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|
224 } /* Switch */ |
| 105 | 225 |
| 226 /* Now we handle args where they might be "-luser" (no spaces)*/ | |
| 227 if (next && strlen(argv[i]) > 2) { | |
| 228 *next = &argv[i][2]; | |
| 229 next = NULL; | |
| 230 } | |
|
46
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231 |
| 47 | 232 continue; /* next argument */ |
| 233 | |
|
46
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|
234 } else { |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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diff
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|
235 TRACE(("non-flag arg: '%s'", argv[i])) |
|
46
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|
236 |
|
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|
237 /* Either the hostname or commands */ |
|
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238 |
|
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|
239 if (cli_opts.remotehost == NULL) { |
|
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240 |
| 47 | 241 parsehostname(argv[i]); |
|
46
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242 |
| 47 | 243 } else { |
|
46
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|
244 |
|
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|
245 /* this is part of the commands to send - after this we |
|
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246 * don't parse any more options, and flags are sent as the |
|
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247 * command */ |
|
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248 cmdlen = 0; |
|
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249 for (j = i; j < (unsigned int)argc; j++) { |
|
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250 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
|
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|
251 } |
|
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|
252 /* Allocate the space */ |
|
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|
253 cli_opts.cmd = (char*)m_malloc(cmdlen); |
|
3bea78e1b175
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diff
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|
254 cli_opts.cmd[0] = '\0'; |
|
3bea78e1b175
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diff
changeset
|
255 |
|
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|
256 /* Append all the bits */ |
|
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|
257 for (j = i; j < (unsigned int)argc; j++) { |
|
3bea78e1b175
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diff
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|
258 strlcat(cli_opts.cmd, argv[j], cmdlen); |
|
3bea78e1b175
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diff
changeset
|
259 strlcat(cli_opts.cmd, " ", cmdlen); |
|
3bea78e1b175
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|
260 } |
|
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changeset
|
261 /* It'll be null-terminated here */ |
|
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diff
changeset
|
262 |
|
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|
263 /* We've eaten all the options and flags */ |
|
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diff
changeset
|
264 break; |
|
39
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changeset
|
265 } |
|
0883c0906870
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changeset
|
266 } |
|
0883c0906870
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parents:
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changeset
|
267 } |
| 47 | 268 |
| 269 if (cli_opts.remotehost == NULL) { | |
|
66
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diff
changeset
|
270 printhelp(); |
|
38c3146aa23d
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changeset
|
271 exit(EXIT_FAILURE); |
| 47 | 272 } |
| 273 | |
| 274 if (cli_opts.remoteport == NULL) { | |
| 275 cli_opts.remoteport = "22"; | |
| 276 } | |
| 277 | |
| 278 /* If not explicitly specified with -t or -T, we don't want a pty if | |
| 279 * there's a command, but we do otherwise */ | |
| 280 if (cli_opts.wantpty == 9) { | |
| 281 if (cli_opts.cmd == NULL) { | |
| 282 cli_opts.wantpty = 1; | |
| 283 } else { | |
| 284 cli_opts.wantpty = 0; | |
| 285 } | |
| 286 } | |
|
326
d965110e3f5c
add -f background option to dbclient
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325
diff
changeset
|
287 |
|
d965110e3f5c
add -f background option to dbclient
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325
diff
changeset
|
288 if (cli_opts.backgrounded && cli_opts.cmd == NULL |
|
d965110e3f5c
add -f background option to dbclient
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325
diff
changeset
|
289 && cli_opts.no_cmd == 0) { |
|
d965110e3f5c
add -f background option to dbclient
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325
diff
changeset
|
290 dropbear_exit("command required for -f"); |
|
d965110e3f5c
add -f background option to dbclient
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325
diff
changeset
|
291 } |
|
39
0883c0906870
tty raw mode support works mostly
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parents:
diff
changeset
|
292 } |
| 47 | 293 |
|
68
eee77ac31ccc
cleaning up the pubkey defines
Matt Johnston <matt@ucc.asn.au>
parents:
66
diff
changeset
|
294 #ifdef ENABLE_CLI_PUBKEY_AUTH |
| 47 | 295 static void loadidentityfile(const char* filename) { |
| 296 | |
|
215
aad4b3f58556
rename PubkeyList to SignKeyList for clarity
Matt Johnston <matt@ucc.asn.au>
parents:
181
diff
changeset
|
297 struct SignKeyList * nextkey; |
| 47 | 298 sign_key *key; |
| 299 int keytype; | |
| 300 | |
| 301 key = new_sign_key(); | |
| 302 keytype = DROPBEAR_SIGNKEY_ANY; | |
| 303 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
| 304 | |
| 305 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
| 306 sign_key_free(key); | |
| 307 | |
| 308 } else { | |
| 309 | |
|
215
aad4b3f58556
rename PubkeyList to SignKeyList for clarity
Matt Johnston <matt@ucc.asn.au>
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181
diff
changeset
|
310 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
| 47 | 311 nextkey->key = key; |
|
215
aad4b3f58556
rename PubkeyList to SignKeyList for clarity
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parents:
181
diff
changeset
|
312 nextkey->next = cli_opts.privkeys; |
| 47 | 313 nextkey->type = keytype; |
|
215
aad4b3f58556
rename PubkeyList to SignKeyList for clarity
Matt Johnston <matt@ucc.asn.au>
parents:
181
diff
changeset
|
314 cli_opts.privkeys = nextkey; |
| 47 | 315 } |
| 316 } | |
| 317 #endif | |
| 318 | |
| 319 | |
| 320 /* Parses a [user@]hostname argument. userhostarg is the argv[i] corresponding | |
| 321 * - note that it will be modified */ | |
| 64 | 322 static void parsehostname(char* orighostarg) { |
| 47 | 323 |
| 324 uid_t uid; | |
| 325 struct passwd *pw = NULL; | |
| 64 | 326 char *userhostarg = NULL; |
| 327 | |
| 328 /* We probably don't want to be editing argvs */ | |
| 329 userhostarg = m_strdup(orighostarg); | |
| 47 | 330 |
| 331 cli_opts.remotehost = strchr(userhostarg, '@'); | |
| 332 if (cli_opts.remotehost == NULL) { | |
| 333 /* no username portion, the cli-auth.c code can figure the | |
| 334 * local user's name */ | |
| 335 cli_opts.remotehost = userhostarg; | |
| 336 } else { | |
| 337 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
| 338 cli_opts.remotehost++; | |
| 339 cli_opts.username = userhostarg; | |
| 340 } | |
| 341 | |
| 342 if (cli_opts.username == NULL) { | |
| 343 uid = getuid(); | |
| 344 | |
| 345 pw = getpwuid(uid); | |
| 346 if (pw == NULL || pw->pw_name == NULL) { | |
| 347 dropbear_exit("Unknown own user"); | |
| 348 } | |
| 349 | |
| 350 cli_opts.username = m_strdup(pw->pw_name); | |
| 351 } | |
| 352 | |
| 353 if (cli_opts.remotehost[0] == '\0') { | |
| 354 dropbear_exit("Bad hostname"); | |
| 355 } | |
| 356 } | |
| 64 | 357 |
| 358 #ifdef ENABLE_CLI_ANYTCPFWD | |
| 359 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
| 360 * set, and add it to the forwarding list */ | |
| 361 static void addforward(char* origstr, struct TCPFwdList** fwdlist) { | |
| 362 | |
| 363 char * listenport = NULL; | |
| 364 char * connectport = NULL; | |
| 365 char * connectaddr = NULL; | |
| 366 struct TCPFwdList* newfwd = NULL; | |
| 367 char * str = NULL; | |
| 368 | |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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134
diff
changeset
|
369 TRACE(("enter addforward")) |
| 64 | 370 |
|
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
|
371 /* We need to split the original argument up. This var |
|
253958302381
Revert bogus fix, make a note that the var is meant to 'leak'
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parents:
407
diff
changeset
|
372 is never free()d. */ |
| 64 | 373 str = m_strdup(origstr); |
| 374 | |
| 375 listenport = str; | |
| 376 | |
| 377 connectaddr = strchr(str, ':'); | |
| 378 if (connectaddr == NULL) { | |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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134
diff
changeset
|
379 TRACE(("connectaddr == NULL")) |
| 64 | 380 goto fail; |
| 381 } | |
|
407
ea0929224294
Fix another leak found by Klocwork
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parents:
258
diff
changeset
|
382 *connectaddr = '\0'; |
| 64 | 383 connectaddr++; |
| 384 | |
| 385 connectport = strchr(connectaddr, ':'); | |
| 386 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
|
387 TRACE(("connectport == NULL")) |
| 64 | 388 goto fail; |
| 389 } | |
|
407
ea0929224294
Fix another leak found by Klocwork
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parents:
258
diff
changeset
|
390 *connectport = '\0'; |
| 64 | 391 connectport++; |
| 392 | |
| 393 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
| 394 | |
| 395 /* Now we check the ports - note that the port ints are unsigned, | |
| 396 * the check later only checks for >= MAX_PORT */ | |
| 397 newfwd->listenport = strtol(listenport, NULL, 10); | |
| 398 if (errno != 0) { | |
|
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
|
399 TRACE(("bad listenport strtol")) |
| 64 | 400 goto fail; |
| 401 } | |
| 402 | |
| 403 newfwd->connectport = strtol(connectport, NULL, 10); | |
| 404 if (errno != 0) { | |
|
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
|
405 TRACE(("bad connectport strtol")) |
| 64 | 406 goto fail; |
| 407 } | |
| 408 | |
| 409 newfwd->connectaddr = connectaddr; | |
| 410 | |
| 411 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
|
412 TRACE(("listenport > 65535")) |
| 64 | 413 goto badport; |
| 414 } | |
| 415 | |
| 416 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
|
417 TRACE(("connectport > 65535")) |
| 64 | 418 goto badport; |
| 419 } | |
| 420 | |
| 421 newfwd->next = *fwdlist; | |
| 422 *fwdlist = newfwd; | |
| 423 | |
|
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
|
424 TRACE(("leave addforward: done")) |
| 64 | 425 return; |
| 426 | |
| 427 fail: | |
| 428 dropbear_exit("Bad TCP forward '%s'", origstr); | |
| 429 | |
| 430 badport: | |
| 431 dropbear_exit("Bad TCP port in '%s'", origstr); | |
| 432 } | |
| 433 #endif |