Mercurial > dropbear
annotate svr-runopts.c @ 94:c85c88500ea6
DEBUG_TRACE now only triggers with -v on the cmdline
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 18 Aug 2004 15:48:25 +0000 |
parents | dc68f7624f17 |
children | 72dc22f56858 |
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 sign_key * loadhostkeys(const char * dsskeyfile, |
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35 const char * rsakeyfile); |
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36 static void printhelp(const char * progname); |
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37 |
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38 static void printhelp(const char * progname) { |
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39 |
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40 fprintf(stderr, "Dropbear sshd v%s\n" |
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41 "Usage: %s [options]\n" |
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42 "Options are:\n" |
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43 "-b bannerfile Display the contents of bannerfile" |
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44 " before user login\n" |
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45 " (default: none)\n" |
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46 #ifdef DROPBEAR_DSS |
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47 "-d dsskeyfile Use dsskeyfile for the dss host key\n" |
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48 " (default: %s)\n" |
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49 #endif |
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50 #ifdef DROPBEAR_RSA |
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51 "-r rsakeyfile Use rsakeyfile for the rsa host key\n" |
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52 " (default: %s)\n" |
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53 #endif |
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54 "-F Don't fork into background\n" |
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55 #ifdef DISABLE_SYSLOG |
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56 "(Syslog support not compiled in, using stderr)\n" |
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57 #else |
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58 "-E Log to stderr rather than syslog\n" |
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59 #endif |
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60 #ifdef DO_MOTD |
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61 "-m Don't display the motd on login\n" |
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62 #endif |
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63 "-w Disallow root logins\n" |
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64 #ifdef ENABLE_SVR_PASSWORD_AUTH |
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65 "-s Disable password logins\n" |
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66 "-g Disable password logins for root\n" |
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67 #endif |
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68 #ifndef DISABLE_LOCALTCPFWD |
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69 "-j Disable local port forwarding\n" |
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70 #endif |
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71 #ifndef DISABLE_REMOTETCPFWD |
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72 "-k Disable remote port forwarding\n" |
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73 #endif |
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74 "-p port Listen on specified tcp port, up to %d can be specified\n" |
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75 " (default %d if none specified)\n" |
71
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76 #ifdef INETD_MODE |
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77 "-i Start for inetd\n" |
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78 #endif |
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79 #ifdef DEBUG_TRACE |
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80 "-v verbose\n" |
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81 #endif |
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82 ,DROPBEAR_VERSION, progname, |
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83 #ifdef DROPBEAR_DSS |
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84 DSS_PRIV_FILENAME, |
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85 #endif |
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86 #ifdef DROPBEAR_RSA |
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87 RSA_PRIV_FILENAME, |
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88 #endif |
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89 DROPBEAR_MAX_PORTS, DROPBEAR_PORT); |
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90 } |
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91 |
24 | 92 void svr_getopts(int argc, char ** argv) { |
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93 |
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94 unsigned int i; |
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95 char ** next = 0; |
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96 unsigned int portnum = 0; |
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97 char *portstring[DROPBEAR_MAX_PORTS]; |
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98 unsigned int longport; |
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99 |
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100 /* see printhelp() for options */ |
24 | 101 svr_opts.rsakeyfile = NULL; |
102 svr_opts.dsskeyfile = NULL; | |
103 svr_opts.bannerfile = NULL; | |
104 svr_opts.banner = NULL; | |
105 svr_opts.forkbg = 1; | |
106 svr_opts.norootlogin = 0; | |
107 svr_opts.noauthpass = 0; | |
108 svr_opts.norootpass = 0; | |
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109 svr_opts.inetdmode = 0; |
24 | 110 opts.nolocaltcp = 0; |
111 opts.noremotetcp = 0; | |
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112 /* not yet |
33 | 113 opts.ipv4 = 1; |
114 opts.ipv6 = 1; | |
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115 */ |
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116 #ifdef DO_MOTD |
24 | 117 svr_opts.domotd = 1; |
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118 #endif |
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119 #ifndef DISABLE_SYSLOG |
24 | 120 svr_opts.usingsyslog = 1; |
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121 #endif |
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122 |
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123 for (i = 1; i < (unsigned int)argc; i++) { |
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124 if (next) { |
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125 *next = argv[i]; |
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126 if (*next == NULL) { |
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127 dropbear_exit("Invalid null argument"); |
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128 } |
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129 next = 0x00; |
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130 continue; |
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131 } |
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132 |
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133 if (argv[i][0] == '-') { |
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134 switch (argv[i][1]) { |
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135 case 'b': |
24 | 136 next = &svr_opts.bannerfile; |
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137 break; |
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138 #ifdef DROPBEAR_DSS |
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139 case 'd': |
24 | 140 next = &svr_opts.dsskeyfile; |
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141 break; |
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142 #endif |
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143 #ifdef DROPBEAR_RSA |
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144 case 'r': |
24 | 145 next = &svr_opts.rsakeyfile; |
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146 break; |
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147 #endif |
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148 case 'F': |
24 | 149 svr_opts.forkbg = 0; |
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150 break; |
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151 #ifndef DISABLE_SYSLOG |
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152 case 'E': |
24 | 153 svr_opts.usingsyslog = 0; |
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154 break; |
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155 #endif |
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156 #ifndef DISABLE_LOCALTCPFWD |
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157 case 'j': |
24 | 158 opts.nolocaltcp = 1; |
4
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159 break; |
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160 #endif |
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161 #ifndef DISABLE_REMOTETCPFWD |
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162 case 'k': |
24 | 163 opts.noremotetcp = 1; |
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164 break; |
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165 #endif |
71
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166 #ifdef INETD_MODE |
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167 case 'i': |
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168 svr_opts.inetdmode = 1; |
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169 break; |
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170 #endif |
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171 case 'p': |
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172 if (portnum < DROPBEAR_MAX_PORTS) { |
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173 portstring[portnum] = NULL; |
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174 next = &portstring[portnum]; |
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175 portnum++; |
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176 } |
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177 break; |
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178 #ifdef DO_MOTD |
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179 /* motd is displayed by default, -m turns it off */ |
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180 case 'm': |
24 | 181 svr_opts.domotd = 0; |
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182 break; |
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183 #endif |
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184 case 'w': |
24 | 185 svr_opts.norootlogin = 1; |
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186 break; |
68
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187 #ifdef ENABLE_SVR_PASSWORD_AUTH |
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188 case 's': |
24 | 189 svr_opts.noauthpass = 1; |
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190 break; |
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191 case 'g': |
24 | 192 svr_opts.norootpass = 1; |
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193 break; |
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194 #endif |
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195 case 'h': |
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196 printhelp(argv[0]); |
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197 exit(EXIT_FAILURE); |
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198 break; |
94
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199 #ifdef DEBUG_TRACE |
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200 case 'v': |
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201 debug_trace = 1; |
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202 break; |
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203 #endif |
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204 /* |
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205 case '4': |
24 | 206 svr_opts.ipv4 = 0; |
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207 break; |
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208 case '6': |
24 | 209 svr_opts.ipv6 = 0; |
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210 break; |
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211 */ |
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212 default: |
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213 fprintf(stderr, "Unknown argument %s\n", argv[i]); |
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214 printhelp(argv[0]); |
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215 exit(EXIT_FAILURE); |
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216 break; |
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217 } |
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218 } |
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219 } |
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220 |
24 | 221 if (svr_opts.dsskeyfile == NULL) { |
222 svr_opts.dsskeyfile = DSS_PRIV_FILENAME; | |
4
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223 } |
24 | 224 if (svr_opts.rsakeyfile == NULL) { |
225 svr_opts.rsakeyfile = RSA_PRIV_FILENAME; | |
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226 } |
24 | 227 svr_opts.hostkey = loadhostkeys(svr_opts.dsskeyfile, svr_opts.rsakeyfile); |
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228 |
24 | 229 if (svr_opts.bannerfile) { |
4
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230 struct stat buf; |
24 | 231 if (stat(svr_opts.bannerfile, &buf) != 0) { |
4
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232 dropbear_exit("Error opening banner file '%s'", |
24 | 233 svr_opts.bannerfile); |
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234 } |
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235 |
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236 if (buf.st_size > MAX_BANNER_SIZE) { |
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237 dropbear_exit("Banner file too large, max is %d bytes", |
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238 MAX_BANNER_SIZE); |
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239 } |
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240 |
24 | 241 svr_opts.banner = buf_new(buf.st_size); |
242 if (buf_readfile(svr_opts.banner, svr_opts.bannerfile)!=DROPBEAR_SUCCESS) { | |
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243 dropbear_exit("Error reading banner file '%s'", |
24 | 244 svr_opts.bannerfile); |
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245 } |
24 | 246 buf_setpos(svr_opts.banner, 0); |
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247 } |
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248 |
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249 /* not yet |
24 | 250 if (!(svr_opts.ipv4 || svr_opts.ipv6)) { |
4
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251 fprintf(stderr, "You can't disable ipv4 and ipv6.\n"); |
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252 exit(1); |
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253 } |
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254 */ |
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255 |
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256 /* create the array of listening ports */ |
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257 if (portnum == 0) { |
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258 /* non specified */ |
24 | 259 svr_opts.portcount = 1; |
260 svr_opts.ports = m_malloc(sizeof(uint16_t)); | |
261 svr_opts.ports[0] = DROPBEAR_PORT; | |
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262 } else { |
24 | 263 svr_opts.portcount = portnum; |
264 svr_opts.ports = (uint16_t*)m_malloc(sizeof(uint16_t)*portnum); | |
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265 for (i = 0; i < portnum; i++) { |
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266 if (portstring[i]) { |
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267 longport = atoi(portstring[i]); |
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268 if (longport <= 65535 && longport > 0) { |
24 | 269 svr_opts.ports[i] = (uint16_t)longport; |
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270 continue; |
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271 } |
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272 } |
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273 fprintf(stderr, "Bad port '%s'\n", |
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274 portstring[i] ? portstring[i] : "null"); |
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275 } |
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276 } |
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277 |
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278 } |
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279 |
47 | 280 static void disablekey(int type, const char* filename) { |
4
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281 |
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282 int i; |
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283 |
47 | 284 for (i = 0; sshhostkey[i].name != NULL; i++) { |
285 if (sshhostkey[i].val == type) { | |
286 sshhostkey[i].usable = 0; | |
287 break; | |
288 } | |
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289 } |
47 | 290 fprintf(stderr, "Failed reading '%s', disabling %s\n", filename, |
291 type == DROPBEAR_SIGNKEY_DSS ? "DSS" : "RSA"); | |
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292 } |
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293 |
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294 static sign_key * loadhostkeys(const char * dsskeyfile, |
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295 const char * rsakeyfile) { |
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296 |
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297 sign_key * hostkey; |
47 | 298 int ret; |
299 int type; | |
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300 |
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301 TRACE(("enter loadhostkeys")); |
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302 |
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303 hostkey = new_sign_key(); |
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304 |
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305 #ifdef DROPBEAR_RSA |
47 | 306 type = DROPBEAR_SIGNKEY_RSA; |
307 ret = readhostkey(rsakeyfile, hostkey, &type); | |
308 if (ret == DROPBEAR_FAILURE) { | |
309 disablekey(DROPBEAR_SIGNKEY_RSA, rsakeyfile); | |
310 } | |
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311 #endif |
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312 #ifdef DROPBEAR_DSS |
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313 type = DROPBEAR_SIGNKEY_DSS; |
47 | 314 ret = readhostkey(dsskeyfile, hostkey, &type); |
315 if (ret == DROPBEAR_FAILURE) { | |
316 disablekey(DROPBEAR_SIGNKEY_DSS, dsskeyfile); | |
317 } | |
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318 #endif |
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319 |
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320 if ( 1 |
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321 #ifdef DROPBEAR_DSS |
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322 && hostkey->dsskey == NULL |
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323 #endif |
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324 #ifdef DROPBEAR_RSA |
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325 && hostkey->rsakey == NULL |
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326 #endif |
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327 ) { |
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328 dropbear_exit("No hostkeys available"); |
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329 } |
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330 |
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331 TRACE(("leave loadhostkeys")); |
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332 return hostkey; |
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333 } |