Mercurial > dropbear
annotate svr-runopts.c @ 927:122fb3532038
Fix typo
author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 13 Mar 2014 23:08:47 +0800 |
parents | 5bfce5dcd461 |
children | 17d874ae93a1 |
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" |
795 | 31 #include "ecdsa.h" |
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32 |
24 | 33 svr_runopts svr_opts; /* GLOBAL */ |
34 | |
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35 static void printhelp(const char * progname); |
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36 static void addportandaddress(char* spec); |
795 | 37 static void loadhostkey(const char *keyfile, int fatal_duplicate); |
38 static void addhostkey(const char *keyfile); | |
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39 |
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40 static void printhelp(const char * progname) { |
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41 |
716 | 42 fprintf(stderr, "Dropbear server v%s https://matt.ucc.asn.au/dropbear/dropbear.html\n" |
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43 "Usage: %s [options]\n" |
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44 "-b bannerfile Display the contents of bannerfile" |
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45 " before user login\n" |
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46 " (default: none)\n" |
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47 "-r keyfile Specify hostkeys (repeatable)\n" |
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48 " defaults: \n" |
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49 #ifdef DROPBEAR_DSS |
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50 " dss %s\n" |
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51 #endif |
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52 #ifdef DROPBEAR_RSA |
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53 " rsa %s\n" |
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54 #endif |
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55 #ifdef DROPBEAR_ECDSA |
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56 " ecdsa %s\n" |
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57 #endif |
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58 #ifdef DROPBEAR_DELAY_HOSTKEY |
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59 "-R Create hostkeys as required\n" |
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60 #endif |
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61 "-F Don't fork into background\n" |
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62 #ifdef DISABLE_SYSLOG |
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63 "(Syslog support not compiled in, using stderr)\n" |
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64 #else |
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65 "-E Log to stderr rather than syslog\n" |
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66 #endif |
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67 #ifdef DO_MOTD |
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68 "-m Don't display the motd on login\n" |
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69 #endif |
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70 "-w Disallow root logins\n" |
121 | 71 #if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) |
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72 "-s Disable password logins\n" |
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73 "-g Disable password logins for root\n" |
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74 "-B Allow blank password logins\n" |
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75 #endif |
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76 #ifdef ENABLE_SVR_LOCALTCPFWD |
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77 "-j Disable local port forwarding\n" |
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78 #endif |
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79 #ifdef ENABLE_SVR_REMOTETCPFWD |
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80 "-k Disable remote port forwarding\n" |
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81 "-a Allow connections to forwarded ports from any host\n" |
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82 #endif |
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83 "-p [address:]port\n" |
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84 " Listen on specified tcp port (and optionally address),\n" |
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85 " up to %d can be specified\n" |
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86 " (default port is %s if none specified)\n" |
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87 "-P PidFile Create pid file PidFile\n" |
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88 " (default %s)\n" |
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89 #ifdef INETD_MODE |
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90 "-i Start for inetd\n" |
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91 #endif |
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92 "-W <receive_window_buffer> (default %d, larger may be faster, max 1MB)\n" |
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93 "-K <keepalive> (0 is never, default %d, in seconds)\n" |
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94 "-I <idle_timeout> (0 is never, default %d, in seconds)\n" |
94
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95 #ifdef DEBUG_TRACE |
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96 "-v verbose (compiled with DEBUG_TRACE)\n" |
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97 #endif |
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98 ,DROPBEAR_VERSION, progname, |
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99 #ifdef DROPBEAR_DSS |
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100 DSS_PRIV_FILENAME, |
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101 #endif |
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102 #ifdef DROPBEAR_RSA |
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103 RSA_PRIV_FILENAME, |
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104 #endif |
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105 #ifdef DROPBEAR_ECDSA |
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106 ECDSA_PRIV_FILENAME, |
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107 #endif |
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108 DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT, DROPBEAR_PIDFILE, |
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109 DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT); |
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110 } |
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111 |
24 | 112 void svr_getopts(int argc, char ** argv) { |
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113 |
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114 unsigned int i; |
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115 char ** next = 0; |
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116 int nextisport = 0; |
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117 char* recv_window_arg = NULL; |
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118 char* keepalive_arg = NULL; |
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119 char* idle_timeout_arg = NULL; |
795 | 120 char* keyfile = NULL; |
121 | |
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122 |
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123 /* see printhelp() for options */ |
24 | 124 svr_opts.bannerfile = NULL; |
125 svr_opts.banner = NULL; | |
126 svr_opts.forkbg = 1; | |
127 svr_opts.norootlogin = 0; | |
128 svr_opts.noauthpass = 0; | |
129 svr_opts.norootpass = 0; | |
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130 svr_opts.allowblankpass = 0; |
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131 svr_opts.inetdmode = 0; |
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132 svr_opts.portcount = 0; |
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133 svr_opts.hostkey = NULL; |
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134 svr_opts.delay_hostkey = 0; |
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135 svr_opts.pidfile = DROPBEAR_PIDFILE; |
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136 #ifdef ENABLE_SVR_LOCALTCPFWD |
258
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137 svr_opts.nolocaltcp = 0; |
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138 #endif |
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139 #ifdef ENABLE_SVR_REMOTETCPFWD |
258
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140 svr_opts.noremotetcp = 0; |
271
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141 #endif |
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142 #ifndef DISABLE_ZLIB |
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143 opts.enable_compress = 1; |
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144 #endif |
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145 /* not yet |
33 | 146 opts.ipv4 = 1; |
147 opts.ipv6 = 1; | |
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148 */ |
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149 #ifdef DO_MOTD |
24 | 150 svr_opts.domotd = 1; |
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151 #endif |
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152 #ifndef DISABLE_SYSLOG |
24 | 153 svr_opts.usingsyslog = 1; |
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154 #endif |
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155 opts.recv_window = DEFAULT_RECV_WINDOW; |
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156 opts.keepalive_secs = DEFAULT_KEEPALIVE; |
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157 opts.idle_timeout_secs = DEFAULT_IDLE_TIMEOUT; |
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158 |
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159 #ifdef ENABLE_SVR_REMOTETCPFWD |
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160 opts.listen_fwd_all = 0; |
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161 #endif |
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162 |
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163 for (i = 1; i < (unsigned int)argc; i++) { |
434
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164 if (nextisport) { |
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165 addportandaddress(argv[i]); |
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166 nextisport = 0; |
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167 continue; |
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168 } |
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169 |
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170 if (next) { |
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171 *next = argv[i]; |
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172 if (*next == NULL) { |
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173 dropbear_exit("Invalid null argument"); |
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174 } |
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175 next = 0x00; |
795 | 176 |
177 if (keyfile) { | |
178 addhostkey(keyfile); | |
179 keyfile = NULL; | |
180 } | |
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181 continue; |
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182 } |
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183 |
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184 if (argv[i][0] == '-') { |
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185 switch (argv[i][1]) { |
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186 case 'b': |
24 | 187 next = &svr_opts.bannerfile; |
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188 break; |
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189 case 'd': |
795 | 190 case 'r': |
191 next = &keyfile; | |
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192 break; |
847
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193 case 'R': |
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194 svr_opts.delay_hostkey = 1; |
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195 break; |
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196 case 'F': |
24 | 197 svr_opts.forkbg = 0; |
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198 break; |
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199 #ifndef DISABLE_SYSLOG |
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200 case 'E': |
24 | 201 svr_opts.usingsyslog = 0; |
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202 break; |
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203 #endif |
271
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204 #ifdef ENABLE_SVR_LOCALTCPFWD |
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205 case 'j': |
258
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206 svr_opts.nolocaltcp = 1; |
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207 break; |
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208 #endif |
271
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209 #ifdef ENABLE_SVR_REMOTETCPFWD |
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210 case 'k': |
258
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211 svr_opts.noremotetcp = 1; |
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212 break; |
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213 case 'a': |
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214 opts.listen_fwd_all = 1; |
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215 break; |
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216 #endif |
71
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217 #ifdef INETD_MODE |
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218 case 'i': |
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219 svr_opts.inetdmode = 1; |
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220 break; |
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221 #endif |
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222 case 'p': |
434
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223 nextisport = 1; |
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224 break; |
323
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225 case 'P': |
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226 next = &svr_opts.pidfile; |
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227 break; |
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228 #ifdef DO_MOTD |
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229 /* motd is displayed by default, -m turns it off */ |
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230 case 'm': |
24 | 231 svr_opts.domotd = 0; |
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232 break; |
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233 #endif |
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234 case 'w': |
24 | 235 svr_opts.norootlogin = 1; |
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236 break; |
449
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237 case 'W': |
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238 next = &recv_window_arg; |
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239 break; |
454
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240 case 'K': |
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241 next = &keepalive_arg; |
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242 break; |
513
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243 case 'I': |
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244 next = &idle_timeout_arg; |
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245 break; |
121 | 246 #if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) |
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247 case 's': |
24 | 248 svr_opts.noauthpass = 1; |
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249 break; |
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250 case 'g': |
24 | 251 svr_opts.norootpass = 1; |
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252 break; |
692
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253 case 'B': |
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254 svr_opts.allowblankpass = 1; |
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255 break; |
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256 #endif |
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257 case 'h': |
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258 printhelp(argv[0]); |
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259 exit(EXIT_FAILURE); |
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260 break; |
442
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261 case 'u': |
446
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262 /* backwards compatibility with old urandom option */ |
442
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263 break; |
94
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264 #ifdef DEBUG_TRACE |
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265 case 'v': |
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266 debug_trace = 1; |
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267 break; |
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268 #endif |
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269 default: |
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270 fprintf(stderr, "Unknown argument %s\n", argv[i]); |
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271 printhelp(argv[0]); |
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272 exit(EXIT_FAILURE); |
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273 break; |
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274 } |
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275 } |
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276 } |
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277 |
101
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278 /* Set up listening ports */ |
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279 if (svr_opts.portcount == 0) { |
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280 svr_opts.ports[0] = m_strdup(DROPBEAR_DEFPORT); |
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281 svr_opts.addresses[0] = m_strdup(DROPBEAR_DEFADDRESS); |
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282 svr_opts.portcount = 1; |
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283 } |
513
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284 |
24 | 285 if (svr_opts.bannerfile) { |
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286 struct stat buf; |
24 | 287 if (stat(svr_opts.bannerfile, &buf) != 0) { |
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288 dropbear_exit("Error opening banner file '%s'", |
24 | 289 svr_opts.bannerfile); |
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290 } |
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291 |
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292 if (buf.st_size > MAX_BANNER_SIZE) { |
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293 dropbear_exit("Banner file too large, max is %d bytes", |
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294 MAX_BANNER_SIZE); |
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295 } |
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296 |
24 | 297 svr_opts.banner = buf_new(buf.st_size); |
298 if (buf_readfile(svr_opts.banner, svr_opts.bannerfile)!=DROPBEAR_SUCCESS) { | |
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299 dropbear_exit("Error reading banner file '%s'", |
24 | 300 svr_opts.bannerfile); |
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301 } |
24 | 302 buf_setpos(svr_opts.banner, 0); |
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303 } |
449
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304 |
454
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305 if (recv_window_arg) { |
449
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306 opts.recv_window = atol(recv_window_arg); |
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307 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
449
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308 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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309 } |
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310 } |
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311 |
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312 if (keepalive_arg) { |
568
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313 unsigned int val; |
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314 if (m_str_to_uint(keepalive_arg, &val) == DROPBEAR_FAILURE) { |
454
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315 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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316 } |
568
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317 opts.keepalive_secs = val; |
454
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318 } |
513
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319 |
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320 if (idle_timeout_arg) { |
568
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321 unsigned int val; |
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322 if (m_str_to_uint(idle_timeout_arg, &val) == DROPBEAR_FAILURE) { |
513
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323 dropbear_exit("Bad idle_timeout '%s'", idle_timeout_arg); |
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324 } |
568
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325 opts.idle_timeout_secs = val; |
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326 } |
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327 } |
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328 |
434
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329 static void addportandaddress(char* spec) { |
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330 |
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331 char *myspec = NULL; |
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332 |
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333 if (svr_opts.portcount < DROPBEAR_MAX_PORTS) { |
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334 |
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335 /* We don't free it, it becomes part of the runopt state */ |
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336 myspec = m_strdup(spec); |
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337 |
706
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338 if (myspec[0] == '[') { |
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339 myspec++; |
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340 svr_opts.ports[svr_opts.portcount] = strchr(myspec, ']'); |
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341 if (svr_opts.ports[svr_opts.portcount] == NULL) { |
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342 /* Unmatched [ -> exit */ |
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343 dropbear_exit("Bad listen address"); |
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344 } |
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345 svr_opts.ports[svr_opts.portcount][0] = '\0'; |
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346 svr_opts.ports[svr_opts.portcount]++; |
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347 if (svr_opts.ports[svr_opts.portcount][0] != ':') { |
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348 /* Missing port -> exit */ |
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349 dropbear_exit("Missing port"); |
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350 } |
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351 } else { |
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352 /* search for ':', that separates address and port */ |
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353 svr_opts.ports[svr_opts.portcount] = strrchr(myspec, ':'); |
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354 } |
434
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355 |
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356 if (svr_opts.ports[svr_opts.portcount] == NULL) { |
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357 /* no ':' -> the whole string specifies just a port */ |
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358 svr_opts.ports[svr_opts.portcount] = myspec; |
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359 } else { |
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360 /* Split the address/port */ |
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361 svr_opts.ports[svr_opts.portcount][0] = '\0'; |
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362 svr_opts.ports[svr_opts.portcount]++; |
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363 svr_opts.addresses[svr_opts.portcount] = myspec; |
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364 } |
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365 |
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366 if (svr_opts.addresses[svr_opts.portcount] == NULL) { |
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367 /* no address given -> fill in the default address */ |
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368 svr_opts.addresses[svr_opts.portcount] = m_strdup(DROPBEAR_DEFADDRESS); |
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369 } |
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370 |
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371 if (svr_opts.ports[svr_opts.portcount][0] == '\0') { |
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372 /* empty port -> exit */ |
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373 dropbear_exit("Bad port"); |
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374 } |
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375 |
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376 svr_opts.portcount++; |
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377 } |
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378 } |
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379 |
795 | 380 static void disablekey(int type) { |
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381 int i; |
802 | 382 TRACE(("Disabling key type %d", type)) |
47 | 383 for (i = 0; sshhostkey[i].name != NULL; i++) { |
384 if (sshhostkey[i].val == type) { | |
802 | 385 sshhostkey[i].usable = 0; |
47 | 386 break; |
387 } | |
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388 } |
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389 } |
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390 |
807
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391 static void loadhostkey_helper(const char *name, void** src, void** dst, int fatal_duplicate) { |
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392 if (*dst) { |
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393 if (fatal_duplicate) { |
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394 dropbear_exit("Only one %s key can be specified", name); |
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395 } |
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396 } else { |
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397 *dst = *src; |
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398 *src = NULL; |
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399 } |
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400 |
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401 } |
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402 |
101
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|
403 /* Must be called after syslog/etc is working */ |
795 | 404 static void loadhostkey(const char *keyfile, int fatal_duplicate) { |
405 sign_key * read_key = new_sign_key(); | |
847
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|
406 enum signkey_type type = DROPBEAR_SIGNKEY_ANY; |
795 | 407 if (readhostkey(keyfile, read_key, &type) == DROPBEAR_FAILURE) { |
408 dropbear_log(LOG_WARNING, "Failed loading %s", keyfile); | |
409 } | |
410 | |
411 #ifdef DROPBEAR_RSA | |
412 if (type == DROPBEAR_SIGNKEY_RSA) { | |
852
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|
413 loadhostkey_helper("RSA", (void**)&read_key->rsakey, (void**)&svr_opts.hostkey->rsakey, fatal_duplicate); |
795 | 414 } |
415 #endif | |
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416 |
795 | 417 #ifdef DROPBEAR_DSS |
418 if (type == DROPBEAR_SIGNKEY_DSS) { | |
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419 loadhostkey_helper("DSS", (void**)&read_key->dsskey, (void**)&svr_opts.hostkey->dsskey, fatal_duplicate); |
795 | 420 } |
421 #endif | |
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422 |
795 | 423 #ifdef DROPBEAR_ECDSA |
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424 #ifdef DROPBEAR_ECC_256 |
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425 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP256) { |
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426 loadhostkey_helper("ECDSA256", (void**)&read_key->ecckey256, (void**)&svr_opts.hostkey->ecckey256, fatal_duplicate); |
795 | 427 } |
428 #endif | |
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429 #ifdef DROPBEAR_ECC_384 |
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430 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP384) { |
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431 loadhostkey_helper("ECDSA384", (void**)&read_key->ecckey384, (void**)&svr_opts.hostkey->ecckey384, fatal_duplicate); |
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432 } |
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433 #endif |
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434 #ifdef DROPBEAR_ECC_521 |
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435 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) { |
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436 loadhostkey_helper("ECDSA521", (void**)&read_key->ecckey521, (void**)&svr_opts.hostkey->ecckey521, fatal_duplicate); |
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437 } |
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438 #endif |
857 | 439 #endif /* DROPBEAR_ECDSA */ |
795 | 440 sign_key_free(read_key); |
441 TRACE(("leave loadhostkey")) | |
442 } | |
443 | |
444 static void addhostkey(const char *keyfile) { | |
445 if (svr_opts.num_hostkey_files >= MAX_HOSTKEYS) { | |
446 dropbear_exit("Too many hostkeys"); | |
447 } | |
448 svr_opts.hostkey_files[svr_opts.num_hostkey_files] = m_strdup(keyfile); | |
449 svr_opts.num_hostkey_files++; | |
450 } | |
451 | |
452 void load_all_hostkeys() { | |
453 int i; | |
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454 int disable_unset_keys = 1; |
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455 int any_keys = 0; |
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456 |
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457 svr_opts.hostkey = new_sign_key(); |
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458 |
795 | 459 for (i = 0; i < svr_opts.num_hostkey_files; i++) { |
460 char *hostkey_file = svr_opts.hostkey_files[i]; | |
461 loadhostkey(hostkey_file, 1); | |
462 m_free(hostkey_file); | |
463 } | |
464 | |
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465 #ifdef DROPBEAR_RSA |
795 | 466 loadhostkey(RSA_PRIV_FILENAME, 0); |
467 #endif | |
468 | |
469 #ifdef DROPBEAR_DSS | |
470 loadhostkey(DSS_PRIV_FILENAME, 0); | |
471 #endif | |
472 | |
473 #ifdef DROPBEAR_ECDSA | |
474 loadhostkey(ECDSA_PRIV_FILENAME, 0); | |
475 #endif | |
476 | |
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477 #ifdef DROPBEAR_DELAY_HOSTKEY |
876 | 478 if (svr_opts.delay_hostkey) { |
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479 disable_unset_keys = 0; |
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480 } |
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481 #endif |
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482 |
795 | 483 #ifdef DROPBEAR_RSA |
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484 if (disable_unset_keys && !svr_opts.hostkey->rsakey) { |
795 | 485 disablekey(DROPBEAR_SIGNKEY_RSA); |
876 | 486 } else { |
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487 any_keys = 1; |
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488 } |
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489 #endif |
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490 |
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491 #ifdef DROPBEAR_DSS |
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492 if (disable_unset_keys && !svr_opts.hostkey->dsskey) { |
876 | 493 disablekey(DROPBEAR_SIGNKEY_DSS); |
494 } else { | |
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495 any_keys = 1; |
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496 } |
795 | 497 #endif |
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498 |
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499 |
795 | 500 #ifdef DROPBEAR_ECDSA |
501 #ifdef DROPBEAR_ECC_256 | |
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502 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 256) |
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503 && !svr_opts.hostkey->ecckey256) { |
795 | 504 disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP256); |
876 | 505 } else { |
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506 any_keys = 1; |
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507 } |
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508 #endif |
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509 |
795 | 510 #ifdef DROPBEAR_ECC_384 |
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511 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 384) |
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512 && !svr_opts.hostkey->ecckey384) { |
795 | 513 disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP384); |
876 | 514 } else { |
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515 any_keys = 1; |
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516 } |
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517 #endif |
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518 |
795 | 519 #ifdef DROPBEAR_ECC_521 |
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520 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 521) |
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521 && !svr_opts.hostkey->ecckey521) { |
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522 disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP521); |
876 | 523 } else { |
873
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524 any_keys = 1; |
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525 } |
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526 #endif |
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527 #endif /* DROPBEAR_ECDSA */ |
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528 |
876 | 529 if (!any_keys) { |
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530 dropbear_exit("No hostkeys available"); |
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531 } |
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532 } |