annotate svr-runopts.c @ 270:50da8d4b5acd

merge of c9dc9c734d4724866a86987356e6aedeed1c93dd and fe38e5c38c2e7d5a4bb76aee511d345f1c2d5ac2
author Matt Johnston <matt@ucc.asn.au>
date Wed, 25 Jan 2006 17:14:32 +0000
parents 306499676384
children be18c7dd486e 740e782679be
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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 svr_runopts svr_opts; /* GLOBAL */
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33
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34 static void printhelp(const char * progname);
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35
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36 static void printhelp(const char * progname) {
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37
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38 fprintf(stderr, "Dropbear sshd v%s\n"
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39 "Usage: %s [options]\n"
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40 "Options are:\n"
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41 "-b bannerfile Display the contents of bannerfile"
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42 " before user login\n"
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43 " (default: none)\n"
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44 #ifdef DROPBEAR_DSS
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45 "-d dsskeyfile Use dsskeyfile for the dss host key\n"
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46 " (default: %s)\n"
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47 #endif
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48 #ifdef DROPBEAR_RSA
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49 "-r rsakeyfile Use rsakeyfile for the rsa host key\n"
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50 " (default: %s)\n"
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51 #endif
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52 "-F Don't fork into background\n"
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53 #ifdef DISABLE_SYSLOG
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54 "(Syslog support not compiled in, using stderr)\n"
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55 #else
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56 "-E Log to stderr rather than syslog\n"
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57 #endif
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58 #ifdef DO_MOTD
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59 "-m Don't display the motd on login\n"
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60 #endif
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61 "-w Disallow root logins\n"
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62 #if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH)
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63 "-s Disable password logins\n"
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64 "-g Disable password logins for root\n"
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65 #endif
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66 #ifdef ENABLE_SVR_LOCALTCPFWD
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67 "-j Disable local port forwarding\n"
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68 #endif
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69 #ifdef ENABLE_SVR_REMOTETCPFWD
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70 "-k Disable remote port forwarding\n"
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71 "-a Allow connections to forwarded ports from any host\n"
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72 #endif
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73 "-p port Listen on specified tcp port, up to %d can be specified\n"
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74 " (default %s if none specified)\n"
71
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75 #ifdef INETD_MODE
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76 "-i Start for inetd\n"
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77 #endif
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78 #ifdef DEBUG_TRACE
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79 "-v verbose\n"
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80 #endif
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81 ,DROPBEAR_VERSION, progname,
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82 #ifdef DROPBEAR_DSS
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83 DSS_PRIV_FILENAME,
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84 #endif
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85 #ifdef DROPBEAR_RSA
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86 RSA_PRIV_FILENAME,
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87 #endif
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88 DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT);
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89 }
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90
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91 void svr_getopts(int argc, char ** argv) {
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92
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93 unsigned int i;
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94 char ** next = 0;
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95
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96 /* see printhelp() for options */
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97 svr_opts.rsakeyfile = NULL;
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98 svr_opts.dsskeyfile = NULL;
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99 svr_opts.bannerfile = NULL;
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100 svr_opts.banner = NULL;
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101 svr_opts.forkbg = 1;
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102 svr_opts.norootlogin = 0;
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103 svr_opts.noauthpass = 0;
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104 svr_opts.norootpass = 0;
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105 svr_opts.inetdmode = 0;
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106 svr_opts.portcount = 0;
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107 svr_opts.hostkey = NULL;
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108 svr_opts.nolocaltcp = 0;
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109 svr_opts.noremotetcp = 0;
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110 /* not yet
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111 opts.ipv4 = 1;
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112 opts.ipv6 = 1;
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113 */
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114 #ifdef DO_MOTD
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115 svr_opts.domotd = 1;
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116 #endif
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117 #ifndef DISABLE_SYSLOG
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118 svr_opts.usingsyslog = 1;
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119 #endif
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120 #ifdef ENABLE_SVR_REMOTETCPFWD
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121 opts.listen_fwd_all = 0;
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122 #endif
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123
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124 for (i = 1; i < (unsigned int)argc; i++) {
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125 if (next) {
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126 *next = argv[i];
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127 if (*next == NULL) {
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128 dropbear_exit("Invalid null argument");
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129 }
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130 next = 0x00;
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131 continue;
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132 }
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133
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134 if (argv[i][0] == '-') {
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135 switch (argv[i][1]) {
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136 case 'b':
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137 next = &svr_opts.bannerfile;
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138 break;
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139 #ifdef DROPBEAR_DSS
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140 case 'd':
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141 next = &svr_opts.dsskeyfile;
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142 break;
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143 #endif
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144 #ifdef DROPBEAR_RSA
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145 case 'r':
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146 next = &svr_opts.rsakeyfile;
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147 break;
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148 #endif
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149 case 'F':
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diff changeset
150 svr_opts.forkbg = 0;
4
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diff changeset
151 break;
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diff changeset
152 #ifndef DISABLE_SYSLOG
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diff changeset
153 case 'E':
24
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diff changeset
154 svr_opts.usingsyslog = 0;
4
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diff changeset
155 break;
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diff changeset
156 #endif
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diff changeset
157 #ifndef DISABLE_LOCALTCPFWD
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158 case 'j':
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
159 svr_opts.nolocaltcp = 1;
4
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160 break;
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diff changeset
161 #endif
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162 #ifndef DISABLE_REMOTETCPFWD
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163 case 'k':
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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diff changeset
164 svr_opts.noremotetcp = 1;
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Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
165 break;
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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parents: 165
diff changeset
166 case 'a':
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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diff changeset
167 opts.listen_fwd_all = 1;
4
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168 break;
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169 #endif
71
ac96bc733e71 adding inetd mode back from 0.43
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diff changeset
170 #ifdef INETD_MODE
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diff changeset
171 case 'i':
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diff changeset
172 svr_opts.inetdmode = 1;
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diff changeset
173 break;
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diff changeset
174 #endif
4
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175 case 'p':
101
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176 if (svr_opts.portcount < DROPBEAR_MAX_PORTS) {
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177 svr_opts.ports[svr_opts.portcount] = NULL;
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178 next = &svr_opts.ports[svr_opts.portcount];
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diff changeset
179 /* Note: if it doesn't actually get set, we'll
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180 * decrement it after the loop */
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181 svr_opts.portcount++;
4
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182 }
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183 break;
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184 #ifdef DO_MOTD
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185 /* motd is displayed by default, -m turns it off */
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186 case 'm':
24
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diff changeset
187 svr_opts.domotd = 0;
4
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188 break;
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189 #endif
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190 case 'w':
24
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diff changeset
191 svr_opts.norootlogin = 1;
4
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192 break;
121
9337c9f9a607 PAM improvements
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diff changeset
193 #if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH)
4
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194 case 's':
24
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diff changeset
195 svr_opts.noauthpass = 1;
4
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196 break;
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197 case 'g':
24
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diff changeset
198 svr_opts.norootpass = 1;
4
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199 break;
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parents:
diff changeset
200 #endif
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parents:
diff changeset
201 case 'h':
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parents:
diff changeset
202 printhelp(argv[0]);
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parents:
diff changeset
203 exit(EXIT_FAILURE);
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diff changeset
204 break;
94
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
Matt Johnston <matt@ucc.asn.au>
parents: 91
diff changeset
205 #ifdef DEBUG_TRACE
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
Matt Johnston <matt@ucc.asn.au>
parents: 91
diff changeset
206 case 'v':
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
Matt Johnston <matt@ucc.asn.au>
parents: 91
diff changeset
207 debug_trace = 1;
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Matt Johnston <matt@ucc.asn.au>
parents: 91
diff changeset
208 break;
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parents: 91
diff changeset
209 #endif
4
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diff changeset
210 default:
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diff changeset
211 fprintf(stderr, "Unknown argument %s\n", argv[i]);
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diff changeset
212 printhelp(argv[0]);
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diff changeset
213 exit(EXIT_FAILURE);
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parents:
diff changeset
214 break;
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parents:
diff changeset
215 }
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parents:
diff changeset
216 }
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217 }
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218
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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parents: 94
diff changeset
219 /* Set up listening ports */
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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parents: 94
diff changeset
220 if (svr_opts.portcount == 0) {
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
221 svr_opts.ports[0] = m_strdup(DROPBEAR_DEFPORT);
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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parents: 94
diff changeset
222 svr_opts.portcount = 1;
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
223 } else {
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
224 /* we may have been given a -p option but no argument to go with
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
225 * it */
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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parents: 94
diff changeset
226 if (svr_opts.ports[svr_opts.portcount-1] == NULL) {
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
227 svr_opts.portcount--;
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
228 }
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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parents: 94
diff changeset
229 }
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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parents: 94
diff changeset
230
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
231 if (svr_opts.dsskeyfile == NULL) {
469950e86d0f switching to global vars
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parents: 4
diff changeset
232 svr_opts.dsskeyfile = DSS_PRIV_FILENAME;
4
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diff changeset
233 }
24
469950e86d0f switching to global vars
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parents: 4
diff changeset
234 if (svr_opts.rsakeyfile == NULL) {
469950e86d0f switching to global vars
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parents: 4
diff changeset
235 svr_opts.rsakeyfile = RSA_PRIV_FILENAME;
4
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parents:
diff changeset
236 }
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parents:
diff changeset
237
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
238 if (svr_opts.bannerfile) {
4
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parents:
diff changeset
239 struct stat buf;
24
469950e86d0f switching to global vars
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parents: 4
diff changeset
240 if (stat(svr_opts.bannerfile, &buf) != 0) {
4
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parents:
diff changeset
241 dropbear_exit("Error opening banner file '%s'",
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
242 svr_opts.bannerfile);
4
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parents:
diff changeset
243 }
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
244
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
245 if (buf.st_size > MAX_BANNER_SIZE) {
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parents:
diff changeset
246 dropbear_exit("Banner file too large, max is %d bytes",
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
247 MAX_BANNER_SIZE);
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parents:
diff changeset
248 }
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parents:
diff changeset
249
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
250 svr_opts.banner = buf_new(buf.st_size);
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
251 if (buf_readfile(svr_opts.banner, svr_opts.bannerfile)!=DROPBEAR_SUCCESS) {
4
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parents:
diff changeset
252 dropbear_exit("Error reading banner file '%s'",
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
253 svr_opts.bannerfile);
4
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parents:
diff changeset
254 }
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
255 buf_setpos(svr_opts.banner, 0);
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
256 }
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
257
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
258 }
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parents:
diff changeset
259
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
260 static void disablekey(int type, const char* filename) {
4
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parents:
diff changeset
261
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
262 int i;
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parents:
diff changeset
263
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
264 for (i = 0; sshhostkey[i].name != NULL; i++) {
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
265 if (sshhostkey[i].val == type) {
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
266 sshhostkey[i].usable = 0;
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
267 break;
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
268 }
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
269 }
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
270 dropbear_log(LOG_WARNING, "Failed reading '%s', disabling %s", filename,
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
271 type == DROPBEAR_SIGNKEY_DSS ? "DSS" : "RSA");
4
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parents:
diff changeset
272 }
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parents:
diff changeset
273
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
274 /* Must be called after syslog/etc is working */
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
275 void loadhostkeys() {
4
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parents:
diff changeset
276
47
4b53a43f0082 - client pubkey auth works
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parents: 33
diff changeset
277 int ret;
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
278 int type;
4
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parents:
diff changeset
279
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 121
diff changeset
280 TRACE(("enter loadhostkeys"))
4
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parents:
diff changeset
281
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
282 svr_opts.hostkey = new_sign_key();
4
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parents:
diff changeset
283
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
284 #ifdef DROPBEAR_RSA
47
4b53a43f0082 - client pubkey auth works
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parents: 33
diff changeset
285 type = DROPBEAR_SIGNKEY_RSA;
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
286 ret = readhostkey(svr_opts.rsakeyfile, svr_opts.hostkey, &type);
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
287 if (ret == DROPBEAR_FAILURE) {
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
288 disablekey(DROPBEAR_SIGNKEY_RSA, svr_opts.rsakeyfile);
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
289 }
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
290 #endif
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
291 #ifdef DROPBEAR_DSS
91
dc68f7624f17 Stupid DSS hostkey bug fixed.
Matt Johnston <matt@ucc.asn.au>
parents: 71
diff changeset
292 type = DROPBEAR_SIGNKEY_DSS;
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
293 ret = readhostkey(svr_opts.dsskeyfile, svr_opts.hostkey, &type);
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
294 if (ret == DROPBEAR_FAILURE) {
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
Matt Johnston <matt@ucc.asn.au>
parents: 94
diff changeset
295 disablekey(DROPBEAR_SIGNKEY_DSS, svr_opts.dsskeyfile);
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
296 }
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
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297 #endif
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298
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299 if ( 1
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300 #ifdef DROPBEAR_DSS
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301 && svr_opts.hostkey->dsskey == NULL
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302 #endif
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303 #ifdef DROPBEAR_RSA
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304 && svr_opts.hostkey->rsakey == NULL
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305 #endif
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306 ) {
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307 dropbear_exit("No hostkeys available");
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308 }
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309
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310 TRACE(("leave loadhostkeys"))
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311 }