annotate svr-runopts.c @ 101:72dc22f56858

Change the way we load keys/ports so we don't print error messages into our socket.
author Matt Johnston <matt@ucc.asn.au>
date Mon, 23 Aug 2004 05:27:34 +0000
parents c85c88500ea6
children 298098b2a61e
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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 #ifdef ENABLE_SVR_PASSWORD_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 #ifndef DISABLE_LOCALTCPFWD
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67 "-j Disable local port forwarding\n"
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68 #endif
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69 #ifndef DISABLE_REMOTETCPFWD
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70 "-k Disable remote port forwarding\n"
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71 #endif
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72 "-p port Listen on specified tcp port, up to %d can be specified\n"
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73 " (default %d if none specified)\n"
71
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74 #ifdef INETD_MODE
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75 "-i Start for inetd\n"
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76 #endif
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77 #ifdef DEBUG_TRACE
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78 "-v verbose\n"
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79 #endif
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80 ,DROPBEAR_VERSION, progname,
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81 #ifdef DROPBEAR_DSS
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82 DSS_PRIV_FILENAME,
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83 #endif
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84 #ifdef DROPBEAR_RSA
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85 RSA_PRIV_FILENAME,
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86 #endif
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87 DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT);
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88 }
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89
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90 void svr_getopts(int argc, char ** argv) {
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91
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92 unsigned int i;
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93 char ** next = 0;
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94
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95 /* see printhelp() for options */
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96 svr_opts.rsakeyfile = NULL;
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97 svr_opts.dsskeyfile = NULL;
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98 svr_opts.bannerfile = NULL;
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99 svr_opts.banner = NULL;
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100 svr_opts.forkbg = 1;
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101 svr_opts.norootlogin = 0;
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102 svr_opts.noauthpass = 0;
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103 svr_opts.norootpass = 0;
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104 svr_opts.inetdmode = 0;
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105 svr_opts.portcount = 0;
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106 svr_opts.hostkey = NULL;
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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 #ifdef DO_MOTD
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114 svr_opts.domotd = 1;
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115 #endif
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116 #ifndef DISABLE_SYSLOG
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117 svr_opts.usingsyslog = 1;
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118 #endif
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119
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120 for (i = 1; i < (unsigned int)argc; i++) {
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121 if (next) {
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122 *next = argv[i];
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123 if (*next == NULL) {
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124 dropbear_exit("Invalid null argument");
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125 }
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126 next = 0x00;
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127 continue;
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128 }
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129
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130 if (argv[i][0] == '-') {
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131 switch (argv[i][1]) {
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132 case 'b':
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133 next = &svr_opts.bannerfile;
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134 break;
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135 #ifdef DROPBEAR_DSS
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136 case 'd':
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137 next = &svr_opts.dsskeyfile;
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138 break;
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139 #endif
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140 #ifdef DROPBEAR_RSA
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141 case 'r':
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142 next = &svr_opts.rsakeyfile;
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143 break;
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144 #endif
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145 case 'F':
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146 svr_opts.forkbg = 0;
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147 break;
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148 #ifndef DISABLE_SYSLOG
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149 case 'E':
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150 svr_opts.usingsyslog = 0;
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151 break;
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152 #endif
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153 #ifndef DISABLE_LOCALTCPFWD
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154 case 'j':
24
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diff changeset
155 opts.nolocaltcp = 1;
4
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156 break;
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157 #endif
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158 #ifndef DISABLE_REMOTETCPFWD
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159 case 'k':
24
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diff changeset
160 opts.noremotetcp = 1;
4
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161 break;
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162 #endif
71
ac96bc733e71 adding inetd mode back from 0.43
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diff changeset
163 #ifdef INETD_MODE
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diff changeset
164 case 'i':
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diff changeset
165 svr_opts.inetdmode = 1;
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diff changeset
166 break;
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diff changeset
167 #endif
4
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168 case 'p':
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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diff changeset
169 if (svr_opts.portcount < DROPBEAR_MAX_PORTS) {
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170 svr_opts.ports[svr_opts.portcount] = NULL;
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171 next = &svr_opts.ports[svr_opts.portcount];
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diff changeset
172 /* Note: if it doesn't actually get set, we'll
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diff changeset
173 * decrement it after the loop */
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diff changeset
174 svr_opts.portcount++;
4
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175 }
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176 break;
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177 #ifdef DO_MOTD
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178 /* motd is displayed by default, -m turns it off */
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179 case 'm':
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diff changeset
180 svr_opts.domotd = 0;
4
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181 break;
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182 #endif
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183 case 'w':
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diff changeset
184 svr_opts.norootlogin = 1;
4
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185 break;
68
eee77ac31ccc cleaning up the pubkey defines
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diff changeset
186 #ifdef ENABLE_SVR_PASSWORD_AUTH
4
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187 case 's':
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188 svr_opts.noauthpass = 1;
4
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189 break;
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190 case 'g':
24
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191 svr_opts.norootpass = 1;
4
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192 break;
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193 #endif
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194 case 'h':
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195 printhelp(argv[0]);
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196 exit(EXIT_FAILURE);
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197 break;
94
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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198 #ifdef DEBUG_TRACE
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diff changeset
199 case 'v':
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diff changeset
200 debug_trace = 1;
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parents: 91
diff changeset
201 break;
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parents: 91
diff changeset
202 #endif
4
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203 default:
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204 fprintf(stderr, "Unknown argument %s\n", argv[i]);
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205 printhelp(argv[0]);
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diff changeset
206 exit(EXIT_FAILURE);
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diff changeset
207 break;
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diff changeset
208 }
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209 }
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210 }
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211
101
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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diff changeset
212 /* Set up listening ports */
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diff changeset
213 if (svr_opts.portcount == 0) {
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
214 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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diff changeset
215 svr_opts.portcount = 1;
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diff changeset
216 } else {
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diff changeset
217 /* 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
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diff changeset
218 * it */
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diff changeset
219 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
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diff changeset
220 svr_opts.portcount--;
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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diff changeset
221 }
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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diff changeset
222 }
72dc22f56858 Change the way we load keys/ports so we don't print error messages into our
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diff changeset
223
24
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parents: 4
diff changeset
224 if (svr_opts.dsskeyfile == NULL) {
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diff changeset
225 svr_opts.dsskeyfile = DSS_PRIV_FILENAME;
4
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diff changeset
226 }
24
469950e86d0f switching to global vars
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parents: 4
diff changeset
227 if (svr_opts.rsakeyfile == NULL) {
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diff changeset
228 svr_opts.rsakeyfile = RSA_PRIV_FILENAME;
4
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229 }
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230
24
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parents: 4
diff changeset
231 if (svr_opts.bannerfile) {
4
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diff changeset
232 struct stat buf;
24
469950e86d0f switching to global vars
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diff changeset
233 if (stat(svr_opts.bannerfile, &buf) != 0) {
4
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diff changeset
234 dropbear_exit("Error opening banner file '%s'",
24
469950e86d0f switching to global vars
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parents: 4
diff changeset
235 svr_opts.bannerfile);
4
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diff changeset
236 }
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237
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diff changeset
238 if (buf.st_size > MAX_BANNER_SIZE) {
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parents:
diff changeset
239 dropbear_exit("Banner file too large, max is %d bytes",
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parents:
diff changeset
240 MAX_BANNER_SIZE);
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diff changeset
241 }
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diff changeset
242
24
469950e86d0f switching to global vars
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parents: 4
diff changeset
243 svr_opts.banner = buf_new(buf.st_size);
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parents: 4
diff changeset
244 if (buf_readfile(svr_opts.banner, svr_opts.bannerfile)!=DROPBEAR_SUCCESS) {
4
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parents:
diff changeset
245 dropbear_exit("Error reading banner file '%s'",
24
469950e86d0f switching to global vars
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parents: 4
diff changeset
246 svr_opts.bannerfile);
4
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parents:
diff changeset
247 }
24
469950e86d0f switching to global vars
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parents: 4
diff changeset
248 buf_setpos(svr_opts.banner, 0);
4
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parents:
diff changeset
249 }
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parents:
diff changeset
250
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
251 }
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parents:
diff changeset
252
47
4b53a43f0082 - client pubkey auth works
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parents: 33
diff changeset
253 static void disablekey(int type, const char* filename) {
4
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diff changeset
254
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diff changeset
255 int i;
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diff changeset
256
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
257 for (i = 0; sshhostkey[i].name != NULL; i++) {
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Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
258 if (sshhostkey[i].val == type) {
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
259 sshhostkey[i].usable = 0;
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
260 break;
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
261 }
4
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diff changeset
262 }
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
263 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
264 type == DROPBEAR_SIGNKEY_DSS ? "DSS" : "RSA");
4
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parents:
diff changeset
265 }
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parents:
diff changeset
266
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
267 /* 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
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parents: 94
diff changeset
268 void loadhostkeys() {
4
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diff changeset
269
47
4b53a43f0082 - client pubkey auth works
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parents: 33
diff changeset
270 int ret;
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
271 int type;
4
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parents:
diff changeset
272
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parents:
diff changeset
273 TRACE(("enter loadhostkeys"));
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parents:
diff changeset
274
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
275 svr_opts.hostkey = new_sign_key();
4
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parents:
diff changeset
276
fe6bca95afa7 Makefile.in contains updated files required
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diff changeset
277 #ifdef DROPBEAR_RSA
47
4b53a43f0082 - client pubkey auth works
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parents: 33
diff changeset
278 type = DROPBEAR_SIGNKEY_RSA;
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
279 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
280 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
281 disablekey(DROPBEAR_SIGNKEY_RSA, svr_opts.rsakeyfile);
47
4b53a43f0082 - client pubkey auth works
Matt Johnston <matt@ucc.asn.au>
parents: 33
diff changeset
282 }
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
283 #endif
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
284 #ifdef DROPBEAR_DSS
91
dc68f7624f17 Stupid DSS hostkey bug fixed.
Matt Johnston <matt@ucc.asn.au>
parents: 71
diff changeset
285 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
286 ret = readhostkey(svr_opts.dsskeyfile, svr_opts.hostkey, &type);
47
4b53a43f0082 - client pubkey auth works
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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_DSS, svr_opts.dsskeyfile);
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
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parents:
diff changeset
291
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
292 if ( 1
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
293 #ifdef DROPBEAR_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
294 && svr_opts.hostkey->dsskey == NULL
4
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parents:
diff changeset
295 #endif
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
296 #ifdef DROPBEAR_RSA
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
297 && svr_opts.hostkey->rsakey == NULL
4
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parents:
diff changeset
298 #endif
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
299 ) {
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
300 dropbear_exit("No hostkeys available");
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parents:
diff changeset
301 }
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parents:
diff changeset
302
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
303 TRACE(("leave loadhostkeys"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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304 }