Mercurial > dropbear
annotate svr-runopts.c @ 123:a0db9a23f6d4
calloc memory rather than mallocing it - can't hurt too much, and is
probably a bit safer
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 14 Sep 2004 13:18:16 +0000 |
parents | 9337c9f9a607 |
children | 0cfba3034be5 |
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 |
24 | 32 svr_runopts svr_opts; /* GLOBAL */ |
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" |
121 | 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 #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" |
104
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73 " (default %s if none specified)\n" |
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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 |
24 | 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 */ |
24 | 96 svr_opts.rsakeyfile = NULL; |
97 svr_opts.dsskeyfile = NULL; | |
98 svr_opts.bannerfile = NULL; | |
99 svr_opts.banner = NULL; | |
100 svr_opts.forkbg = 1; | |
101 svr_opts.norootlogin = 0; | |
102 svr_opts.noauthpass = 0; | |
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; |
24 | 107 opts.nolocaltcp = 0; |
108 opts.noremotetcp = 0; | |
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109 /* not yet |
33 | 110 opts.ipv4 = 1; |
111 opts.ipv6 = 1; | |
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112 */ |
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113 #ifdef DO_MOTD |
24 | 114 svr_opts.domotd = 1; |
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115 #endif |
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116 #ifndef DISABLE_SYSLOG |
24 | 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': |
24 | 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': |
24 | 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': |
24 | 142 next = &svr_opts.rsakeyfile; |
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143 break; |
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144 #endif |
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145 case 'F': |
24 | 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': |
24 | 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 | 155 opts.nolocaltcp = 1; |
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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 | 160 opts.noremotetcp = 1; |
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161 break; |
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162 #endif |
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163 #ifdef INETD_MODE |
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164 case 'i': |
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165 svr_opts.inetdmode = 1; |
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166 break; |
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167 #endif |
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168 case 'p': |
101
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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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172 /* Note: if it doesn't actually get set, we'll |
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173 * decrement it after the loop */ |
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174 svr_opts.portcount++; |
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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': |
24 | 180 svr_opts.domotd = 0; |
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181 break; |
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182 #endif |
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183 case 'w': |
24 | 184 svr_opts.norootlogin = 1; |
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185 break; |
121 | 186 #if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) |
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187 case 's': |
24 | 188 svr_opts.noauthpass = 1; |
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189 break; |
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190 case 'g': |
24 | 191 svr_opts.norootpass = 1; |
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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
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198 #ifdef DEBUG_TRACE |
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199 case 'v': |
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200 debug_trace = 1; |
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201 break; |
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202 #endif |
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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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206 exit(EXIT_FAILURE); |
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207 break; |
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208 } |
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209 } |
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210 } |
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211 |
101
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212 /* Set up listening ports */ |
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213 if (svr_opts.portcount == 0) { |
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214 svr_opts.ports[0] = m_strdup(DROPBEAR_DEFPORT); |
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215 svr_opts.portcount = 1; |
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216 } else { |
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217 /* we may have been given a -p option but no argument to go with |
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218 * it */ |
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219 if (svr_opts.ports[svr_opts.portcount-1] == NULL) { |
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220 svr_opts.portcount--; |
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221 } |
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222 } |
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223 |
24 | 224 if (svr_opts.dsskeyfile == NULL) { |
225 svr_opts.dsskeyfile = DSS_PRIV_FILENAME; | |
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226 } |
24 | 227 if (svr_opts.rsakeyfile == NULL) { |
228 svr_opts.rsakeyfile = RSA_PRIV_FILENAME; | |
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229 } |
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230 |
24 | 231 if (svr_opts.bannerfile) { |
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232 struct stat buf; |
24 | 233 if (stat(svr_opts.bannerfile, &buf) != 0) { |
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234 dropbear_exit("Error opening banner file '%s'", |
24 | 235 svr_opts.bannerfile); |
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236 } |
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237 |
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238 if (buf.st_size > MAX_BANNER_SIZE) { |
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239 dropbear_exit("Banner file too large, max is %d bytes", |
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240 MAX_BANNER_SIZE); |
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241 } |
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242 |
24 | 243 svr_opts.banner = buf_new(buf.st_size); |
244 if (buf_readfile(svr_opts.banner, svr_opts.bannerfile)!=DROPBEAR_SUCCESS) { | |
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245 dropbear_exit("Error reading banner file '%s'", |
24 | 246 svr_opts.bannerfile); |
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247 } |
24 | 248 buf_setpos(svr_opts.banner, 0); |
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249 } |
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250 |
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251 } |
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252 |
47 | 253 static void disablekey(int type, const char* filename) { |
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254 |
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255 int i; |
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256 |
47 | 257 for (i = 0; sshhostkey[i].name != NULL; i++) { |
258 if (sshhostkey[i].val == type) { | |
259 sshhostkey[i].usable = 0; | |
260 break; | |
261 } | |
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262 } |
101
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263 dropbear_log(LOG_WARNING, "Failed reading '%s', disabling %s", filename, |
47 | 264 type == DROPBEAR_SIGNKEY_DSS ? "DSS" : "RSA"); |
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265 } |
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266 |
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267 /* Must be called after syslog/etc is working */ |
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268 void loadhostkeys() { |
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269 |
47 | 270 int ret; |
271 int type; | |
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272 |
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273 TRACE(("enter loadhostkeys")); |
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274 |
101
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275 svr_opts.hostkey = new_sign_key(); |
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276 |
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277 #ifdef DROPBEAR_RSA |
47 | 278 type = DROPBEAR_SIGNKEY_RSA; |
101
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279 ret = readhostkey(svr_opts.rsakeyfile, svr_opts.hostkey, &type); |
47 | 280 if (ret == DROPBEAR_FAILURE) { |
101
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281 disablekey(DROPBEAR_SIGNKEY_RSA, svr_opts.rsakeyfile); |
47 | 282 } |
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283 #endif |
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284 #ifdef DROPBEAR_DSS |
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285 type = DROPBEAR_SIGNKEY_DSS; |
101
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286 ret = readhostkey(svr_opts.dsskeyfile, svr_opts.hostkey, &type); |
47 | 287 if (ret == DROPBEAR_FAILURE) { |
101
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288 disablekey(DROPBEAR_SIGNKEY_DSS, svr_opts.dsskeyfile); |
47 | 289 } |
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290 #endif |
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291 |
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292 if ( 1 |
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293 #ifdef DROPBEAR_DSS |
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294 && svr_opts.hostkey->dsskey == NULL |
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295 #endif |
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296 #ifdef DROPBEAR_RSA |
101
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297 && svr_opts.hostkey->rsakey == NULL |
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298 #endif |
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299 ) { |
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300 dropbear_exit("No hostkeys available"); |
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301 } |
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302 |
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303 TRACE(("leave loadhostkeys")); |
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Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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304 } |