Mercurial > dropbear
annotate cli-runopts.c @ 47:4b53a43f0082
- client pubkey auth works
- rearrange the runopts code for client and server (hostkey reading is needed
by both (if the client is doing pubkey auth. otherwise....))
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Fri, 06 Aug 2004 16:18:01 +0000 |
| parents | 3bea78e1b175 |
| children | 6f091656c100 |
| 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" |
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31 |
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32 cli_runopts cli_opts; /* GLOBAL */ |
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33 |
| 47 | 34 static void printhelp(); |
| 35 static void parsehostname(char* userhostarg); | |
| 36 #ifdef DROPBEAR_PUBKEY_AUTH | |
| 37 static void loadidentityfile(const char* filename); | |
| 38 #endif | |
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39 |
| 47 | 40 static void printhelp() { |
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41 |
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42 fprintf(stderr, "Dropbear client v%s\n" |
| 47 | 43 "Usage: %s [options] user@host\n" |
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44 "Options are:\n" |
| 47 | 45 "-p <remoteport>\n" |
| 46 "-t Allocate a pty" | |
| 47 "-T Don't allocate a pty" | |
| 48 #ifdef DROPBEAR_PUBKEY_AUTH | |
| 49 "-i <identityfile> (multiple allowed)" | |
| 50 #endif | |
| 51 ,DROPBEAR_VERSION, cli_opts.progname); | |
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52 } |
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53 |
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54 void cli_getopts(int argc, char ** argv) { |
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55 |
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56 unsigned int i, j; |
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57 char ** next = 0; |
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58 unsigned int cmdlen; |
| 47 | 59 #ifdef DROPBEAR_PUBKEY_AUTH |
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60 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
| 47 | 61 #endif |
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62 |
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63 |
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64 |
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65 /* see printhelp() for options */ |
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66 cli_opts.progname = argv[0]; |
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67 cli_opts.remotehost = NULL; |
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68 cli_opts.remoteport = NULL; |
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69 cli_opts.username = NULL; |
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70 cli_opts.cmd = NULL; |
| 47 | 71 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
| 72 #ifdef DROPBEAR_PUBKEY_AUTH | |
| 73 cli_opts.pubkeys = NULL; | |
| 74 #endif | |
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75 opts.nolocaltcp = 0; |
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76 opts.noremotetcp = 0; |
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77 /* not yet |
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78 opts.ipv4 = 1; |
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79 opts.ipv6 = 1; |
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80 */ |
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81 |
| 47 | 82 /* Iterate all the arguments */ |
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83 for (i = 1; i < (unsigned int)argc; i++) { |
| 47 | 84 #ifdef DROPBEAR_PUBKEY_AUTH |
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85 if (nextiskey) { |
| 47 | 86 /* Load a hostkey since the previous argument was "-i" */ |
| 87 loadidentityfile(argv[i]); | |
| 88 nextiskey = 0; | |
| 89 continue; | |
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90 } |
| 47 | 91 #endif |
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92 if (next) { |
| 47 | 93 /* The previous flag set a value to assign */ |
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94 *next = argv[i]; |
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95 if (*next == NULL) { |
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96 dropbear_exit("Invalid null argument"); |
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97 } |
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98 next = NULL; |
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99 continue; |
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100 } |
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101 |
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102 if (argv[i][0] == '-') { |
| 47 | 103 /* A flag *waves* */ |
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104 |
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105 switch (argv[i][1]) { |
| 47 | 106 case 'p': /* remoteport */ |
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107 next = &cli_opts.remoteport; |
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108 break; |
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109 #ifdef DROPBEAR_PUBKEY_AUTH |
| 47 | 110 case 'i': /* an identityfile */ |
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111 nextiskey = 1; |
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112 break; |
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113 #endif |
| 47 | 114 case 't': /* we want a pty */ |
| 115 cli_opts.wantpty = 1; | |
| 116 break; | |
| 117 case 'T': /* don't want a pty */ | |
| 118 cli_opts.wantpty = 0; | |
| 119 break; | |
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120 default: |
| 47 | 121 fprintf(stderr, "Unknown argument '%s'\n", argv[i]); |
| 122 printhelp(); | |
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123 exit(EXIT_FAILURE); |
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124 break; |
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125 } /* Switch */ |
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126 |
| 47 | 127 continue; /* next argument */ |
| 128 | |
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129 } else { |
| 47 | 130 TRACE(("non-flag arg")); |
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131 |
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132 /* Either the hostname or commands */ |
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133 |
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134 if (cli_opts.remotehost == NULL) { |
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135 |
| 47 | 136 parsehostname(argv[i]); |
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137 |
| 47 | 138 } else { |
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139 |
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140 /* this is part of the commands to send - after this we |
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141 * don't parse any more options, and flags are sent as the |
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142 * command */ |
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143 cmdlen = 0; |
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144 for (j = i; j < (unsigned int)argc; j++) { |
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145 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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146 } |
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147 /* Allocate the space */ |
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148 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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149 cli_opts.cmd[0] = '\0'; |
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150 |
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151 /* Append all the bits */ |
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152 for (j = i; j < (unsigned int)argc; j++) { |
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153 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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154 strlcat(cli_opts.cmd, " ", cmdlen); |
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155 } |
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156 /* It'll be null-terminated here */ |
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157 |
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158 /* We've eaten all the options and flags */ |
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159 break; |
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160 } |
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parents:
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changeset
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161 } |
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162 } |
| 47 | 163 |
| 164 if (cli_opts.remotehost == NULL) { | |
| 165 dropbear_exit("Bad syntax"); | |
| 166 } | |
| 167 | |
| 168 if (cli_opts.remoteport == NULL) { | |
| 169 cli_opts.remoteport = "22"; | |
| 170 } | |
| 171 | |
| 172 /* If not explicitly specified with -t or -T, we don't want a pty if | |
| 173 * there's a command, but we do otherwise */ | |
| 174 if (cli_opts.wantpty == 9) { | |
| 175 if (cli_opts.cmd == NULL) { | |
| 176 cli_opts.wantpty = 1; | |
| 177 } else { | |
| 178 cli_opts.wantpty = 0; | |
| 179 } | |
| 180 } | |
|
39
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181 } |
| 47 | 182 |
| 183 #ifdef DROPBEAR_PUBKEY_AUTH | |
| 184 static void loadidentityfile(const char* filename) { | |
| 185 | |
| 186 struct PubkeyList * nextkey; | |
| 187 sign_key *key; | |
| 188 int keytype; | |
| 189 | |
| 190 key = new_sign_key(); | |
| 191 keytype = DROPBEAR_SIGNKEY_ANY; | |
| 192 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
| 193 | |
| 194 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
| 195 sign_key_free(key); | |
| 196 | |
| 197 } else { | |
| 198 | |
| 199 nextkey = (struct PubkeyList*)m_malloc(sizeof(struct PubkeyList)); | |
| 200 nextkey->key = key; | |
| 201 nextkey->next = cli_opts.pubkeys; | |
| 202 nextkey->type = keytype; | |
| 203 cli_opts.pubkeys = nextkey; | |
| 204 } | |
| 205 } | |
| 206 #endif | |
| 207 | |
| 208 | |
| 209 /* Parses a [user@]hostname argument. userhostarg is the argv[i] corresponding | |
| 210 * - note that it will be modified */ | |
| 211 static void parsehostname(char* userhostarg) { | |
| 212 | |
| 213 uid_t uid; | |
| 214 struct passwd *pw = NULL; | |
| 215 | |
| 216 cli_opts.remotehost = strchr(userhostarg, '@'); | |
| 217 if (cli_opts.remotehost == NULL) { | |
| 218 /* no username portion, the cli-auth.c code can figure the | |
| 219 * local user's name */ | |
| 220 cli_opts.remotehost = userhostarg; | |
| 221 } else { | |
| 222 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
| 223 cli_opts.remotehost++; | |
| 224 cli_opts.username = userhostarg; | |
| 225 } | |
| 226 | |
| 227 if (cli_opts.username == NULL) { | |
| 228 uid = getuid(); | |
| 229 | |
| 230 pw = getpwuid(uid); | |
| 231 if (pw == NULL || pw->pw_name == NULL) { | |
| 232 dropbear_exit("Unknown own user"); | |
| 233 } | |
| 234 | |
| 235 cli_opts.username = m_strdup(pw->pw_name); | |
| 236 } | |
| 237 | |
| 238 if (cli_opts.remotehost[0] == '\0') { | |
| 239 dropbear_exit("Bad hostname"); | |
| 240 } | |
| 241 } |