Mercurial > dropbear
annotate svr-runopts.c @ 665:4d9511f98462
fix out-of-tree cleaning
If we build out of tree and then run `make clean`, we hit an
infinite loop where libtommath tries to enter subdirs that don't
exist and run `make clean`.
author | Mike Frysinger <vapier@gentoo.org> |
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date | Sun, 08 Apr 2012 02:06:54 -0400 |
parents | e27d7fb23376 |
children | 675bbd630f5d |
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 static void addportandaddress(char* spec); |
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36 |
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37 static void printhelp(const char * progname) { |
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38 |
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39 fprintf(stderr, "Dropbear sshd v%s\n" |
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40 "Usage: %s [options]\n" |
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41 "Options are:\n" |
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42 "-b bannerfile Display the contents of bannerfile" |
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43 " before user login\n" |
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44 " (default: none)\n" |
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45 #ifdef DROPBEAR_DSS |
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46 "-d dsskeyfile Use dsskeyfile for the DSS host key\n" |
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47 " (default: %s)\n" |
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48 #endif |
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49 #ifdef DROPBEAR_RSA |
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50 "-r rsakeyfile Use rsakeyfile for the RSA host key\n" |
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51 " (default: %s)\n" |
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52 #endif |
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53 "-F Don't fork into background\n" |
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54 #ifdef DISABLE_SYSLOG |
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55 "(Syslog support not compiled in, using stderr)\n" |
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56 #else |
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57 "-E Log to stderr rather than syslog\n" |
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58 #endif |
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59 #ifdef DO_MOTD |
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60 "-m Don't display the motd on login\n" |
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61 #endif |
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62 "-w Disallow root logins\n" |
121 | 63 #if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) |
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64 "-s Disable password logins\n" |
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65 "-g Disable password logins for root\n" |
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66 #endif |
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67 #ifdef ENABLE_SVR_LOCALTCPFWD |
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68 "-j Disable local port forwarding\n" |
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69 #endif |
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70 #ifdef ENABLE_SVR_REMOTETCPFWD |
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71 "-k Disable remote port forwarding\n" |
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72 "-a Allow connections to forwarded ports from any host\n" |
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73 #endif |
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74 "-p [address:]port\n" |
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75 " Listen on specified tcp port (and optionally address),\n" |
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76 " up to %d can be specified\n" |
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77 " (default port is %s if none specified)\n" |
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78 "-P PidFile Create pid file PidFile\n" |
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79 " (default %s)\n" |
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80 #ifdef INETD_MODE |
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81 "-i Start for inetd\n" |
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82 #endif |
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83 "-W <receive_window_buffer> (default %d, larger may be faster, max 1MB)\n" |
622
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84 "-K <keepalive> (0 is never, default %d, in seconds)\n" |
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85 "-I <idle_timeout> (0 is never, default %d, in seconds)\n" |
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86 #ifdef DEBUG_TRACE |
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87 "-v verbose (compiled with DEBUG_TRACE)\n" |
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88 #endif |
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89 ,DROPBEAR_VERSION, progname, |
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90 #ifdef DROPBEAR_DSS |
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91 DSS_PRIV_FILENAME, |
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92 #endif |
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93 #ifdef DROPBEAR_RSA |
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94 RSA_PRIV_FILENAME, |
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95 #endif |
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96 DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT, DROPBEAR_PIDFILE, |
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97 DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT); |
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98 } |
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99 |
24 | 100 void svr_getopts(int argc, char ** argv) { |
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101 |
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102 unsigned int i; |
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103 char ** next = 0; |
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104 int nextisport = 0; |
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105 char* recv_window_arg = NULL; |
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106 char* keepalive_arg = NULL; |
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107 char* idle_timeout_arg = NULL; |
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108 |
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109 /* see printhelp() for options */ |
24 | 110 svr_opts.rsakeyfile = NULL; |
111 svr_opts.dsskeyfile = NULL; | |
112 svr_opts.bannerfile = NULL; | |
113 svr_opts.banner = NULL; | |
114 svr_opts.forkbg = 1; | |
115 svr_opts.norootlogin = 0; | |
116 svr_opts.noauthpass = 0; | |
117 svr_opts.norootpass = 0; | |
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118 svr_opts.inetdmode = 0; |
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119 svr_opts.portcount = 0; |
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120 svr_opts.hostkey = NULL; |
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121 svr_opts.pidfile = DROPBEAR_PIDFILE; |
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122 #ifdef ENABLE_SVR_LOCALTCPFWD |
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123 svr_opts.nolocaltcp = 0; |
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124 #endif |
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125 #ifdef ENABLE_SVR_REMOTETCPFWD |
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126 svr_opts.noremotetcp = 0; |
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127 #endif |
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128 #ifndef DISABLE_ZLIB |
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129 opts.enable_compress = 1; |
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130 #endif |
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131 /* not yet |
33 | 132 opts.ipv4 = 1; |
133 opts.ipv6 = 1; | |
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134 */ |
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135 #ifdef DO_MOTD |
24 | 136 svr_opts.domotd = 1; |
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137 #endif |
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138 #ifndef DISABLE_SYSLOG |
24 | 139 svr_opts.usingsyslog = 1; |
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140 #endif |
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141 opts.recv_window = DEFAULT_RECV_WINDOW; |
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142 opts.keepalive_secs = DEFAULT_KEEPALIVE; |
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143 opts.idle_timeout_secs = DEFAULT_IDLE_TIMEOUT; |
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144 |
258
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145 #ifdef ENABLE_SVR_REMOTETCPFWD |
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146 opts.listen_fwd_all = 0; |
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147 #endif |
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148 |
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149 for (i = 1; i < (unsigned int)argc; i++) { |
434
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150 if (nextisport) { |
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151 addportandaddress(argv[i]); |
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152 nextisport = 0; |
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153 continue; |
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154 } |
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155 |
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156 if (next) { |
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157 *next = argv[i]; |
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158 if (*next == NULL) { |
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159 dropbear_exit("Invalid null argument"); |
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160 } |
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161 next = 0x00; |
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162 continue; |
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163 } |
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164 |
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165 if (argv[i][0] == '-') { |
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166 switch (argv[i][1]) { |
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167 case 'b': |
24 | 168 next = &svr_opts.bannerfile; |
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169 break; |
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170 #ifdef DROPBEAR_DSS |
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171 case 'd': |
24 | 172 next = &svr_opts.dsskeyfile; |
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173 break; |
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174 #endif |
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175 #ifdef DROPBEAR_RSA |
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176 case 'r': |
24 | 177 next = &svr_opts.rsakeyfile; |
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178 break; |
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179 #endif |
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180 case 'F': |
24 | 181 svr_opts.forkbg = 0; |
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182 break; |
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183 #ifndef DISABLE_SYSLOG |
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184 case 'E': |
24 | 185 svr_opts.usingsyslog = 0; |
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186 break; |
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187 #endif |
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188 #ifdef ENABLE_SVR_LOCALTCPFWD |
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189 case 'j': |
258
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190 svr_opts.nolocaltcp = 1; |
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191 break; |
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192 #endif |
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193 #ifdef ENABLE_SVR_REMOTETCPFWD |
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194 case 'k': |
258
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195 svr_opts.noremotetcp = 1; |
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196 break; |
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197 case 'a': |
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198 opts.listen_fwd_all = 1; |
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199 break; |
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200 #endif |
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201 #ifdef INETD_MODE |
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202 case 'i': |
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203 svr_opts.inetdmode = 1; |
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204 break; |
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205 #endif |
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206 case 'p': |
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207 nextisport = 1; |
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208 break; |
323
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209 case 'P': |
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210 next = &svr_opts.pidfile; |
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211 break; |
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212 #ifdef DO_MOTD |
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213 /* motd is displayed by default, -m turns it off */ |
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214 case 'm': |
24 | 215 svr_opts.domotd = 0; |
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216 break; |
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217 #endif |
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218 case 'w': |
24 | 219 svr_opts.norootlogin = 1; |
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220 break; |
449
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221 case 'W': |
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222 next = &recv_window_arg; |
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223 break; |
454
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224 case 'K': |
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225 next = &keepalive_arg; |
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226 break; |
513
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227 case 'I': |
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228 next = &idle_timeout_arg; |
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229 break; |
121 | 230 #if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) |
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231 case 's': |
24 | 232 svr_opts.noauthpass = 1; |
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233 break; |
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234 case 'g': |
24 | 235 svr_opts.norootpass = 1; |
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236 break; |
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237 #endif |
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238 case 'h': |
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239 printhelp(argv[0]); |
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240 exit(EXIT_FAILURE); |
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241 break; |
442
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242 case 'u': |
446
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243 /* backwards compatibility with old urandom option */ |
442
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244 break; |
94
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245 #ifdef DEBUG_TRACE |
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246 case 'v': |
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247 debug_trace = 1; |
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248 break; |
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249 #endif |
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250 default: |
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251 fprintf(stderr, "Unknown argument %s\n", argv[i]); |
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252 printhelp(argv[0]); |
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253 exit(EXIT_FAILURE); |
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254 break; |
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255 } |
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256 } |
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257 } |
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258 |
101
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259 /* Set up listening ports */ |
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260 if (svr_opts.portcount == 0) { |
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261 svr_opts.ports[0] = m_strdup(DROPBEAR_DEFPORT); |
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262 svr_opts.addresses[0] = m_strdup(DROPBEAR_DEFADDRESS); |
101
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263 svr_opts.portcount = 1; |
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264 } |
513
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265 |
24 | 266 if (svr_opts.dsskeyfile == NULL) { |
267 svr_opts.dsskeyfile = DSS_PRIV_FILENAME; | |
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268 } |
24 | 269 if (svr_opts.rsakeyfile == NULL) { |
270 svr_opts.rsakeyfile = RSA_PRIV_FILENAME; | |
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271 } |
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272 |
24 | 273 if (svr_opts.bannerfile) { |
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274 struct stat buf; |
24 | 275 if (stat(svr_opts.bannerfile, &buf) != 0) { |
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276 dropbear_exit("Error opening banner file '%s'", |
24 | 277 svr_opts.bannerfile); |
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278 } |
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279 |
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280 if (buf.st_size > MAX_BANNER_SIZE) { |
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281 dropbear_exit("Banner file too large, max is %d bytes", |
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282 MAX_BANNER_SIZE); |
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283 } |
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284 |
24 | 285 svr_opts.banner = buf_new(buf.st_size); |
286 if (buf_readfile(svr_opts.banner, svr_opts.bannerfile)!=DROPBEAR_SUCCESS) { | |
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287 dropbear_exit("Error reading banner file '%s'", |
24 | 288 svr_opts.bannerfile); |
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289 } |
24 | 290 buf_setpos(svr_opts.banner, 0); |
449
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291 |
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292 } |
449
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293 |
454
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294 if (recv_window_arg) { |
449
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295 opts.recv_window = atol(recv_window_arg); |
492
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296 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
449
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297 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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298 } |
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299 } |
454
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300 |
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301 if (keepalive_arg) { |
568
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302 unsigned int val; |
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303 if (m_str_to_uint(keepalive_arg, &val) == DROPBEAR_FAILURE) { |
454
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304 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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305 } |
568
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306 opts.keepalive_secs = val; |
454
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307 } |
513
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308 |
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309 if (idle_timeout_arg) { |
568
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310 unsigned int val; |
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311 if (m_str_to_uint(idle_timeout_arg, &val) == DROPBEAR_FAILURE) { |
513
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312 dropbear_exit("Bad idle_timeout '%s'", idle_timeout_arg); |
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313 } |
568
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314 opts.idle_timeout_secs = val; |
513
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315 } |
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316 } |
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317 |
434
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318 static void addportandaddress(char* spec) { |
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319 |
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320 char *myspec = NULL; |
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321 |
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322 if (svr_opts.portcount < DROPBEAR_MAX_PORTS) { |
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323 |
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324 /* We don't free it, it becomes part of the runopt state */ |
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325 myspec = m_strdup(spec); |
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326 |
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327 /* search for ':', that separates address and port */ |
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328 svr_opts.ports[svr_opts.portcount] = strchr(myspec, ':'); |
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329 |
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330 if (svr_opts.ports[svr_opts.portcount] == NULL) { |
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331 /* no ':' -> the whole string specifies just a port */ |
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332 svr_opts.ports[svr_opts.portcount] = myspec; |
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333 } else { |
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334 /* Split the address/port */ |
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335 svr_opts.ports[svr_opts.portcount][0] = '\0'; |
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336 svr_opts.ports[svr_opts.portcount]++; |
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337 svr_opts.addresses[svr_opts.portcount] = myspec; |
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338 } |
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339 |
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340 if (svr_opts.addresses[svr_opts.portcount] == NULL) { |
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341 /* no address given -> fill in the default address */ |
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342 svr_opts.addresses[svr_opts.portcount] = m_strdup(DROPBEAR_DEFADDRESS); |
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343 } |
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344 |
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345 if (svr_opts.ports[svr_opts.portcount][0] == '\0') { |
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346 /* empty port -> exit */ |
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347 dropbear_exit("Bad port"); |
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348 } |
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349 |
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350 svr_opts.portcount++; |
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351 } |
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352 } |
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353 |
47 | 354 static void disablekey(int type, const char* filename) { |
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355 |
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356 int i; |
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357 |
47 | 358 for (i = 0; sshhostkey[i].name != NULL; i++) { |
359 if (sshhostkey[i].val == type) { | |
360 sshhostkey[i].usable = 0; | |
361 break; | |
362 } | |
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363 } |
101
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364 dropbear_log(LOG_WARNING, "Failed reading '%s', disabling %s", filename, |
47 | 365 type == DROPBEAR_SIGNKEY_DSS ? "DSS" : "RSA"); |
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366 } |
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367 |
101
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368 /* Must be called after syslog/etc is working */ |
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369 void loadhostkeys() { |
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370 |
47 | 371 int ret; |
372 int type; | |
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373 |
165
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374 TRACE(("enter loadhostkeys")) |
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375 |
101
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376 svr_opts.hostkey = new_sign_key(); |
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377 |
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378 #ifdef DROPBEAR_RSA |
47 | 379 type = DROPBEAR_SIGNKEY_RSA; |
101
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380 ret = readhostkey(svr_opts.rsakeyfile, svr_opts.hostkey, &type); |
47 | 381 if (ret == DROPBEAR_FAILURE) { |
101
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382 disablekey(DROPBEAR_SIGNKEY_RSA, svr_opts.rsakeyfile); |
47 | 383 } |
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384 #endif |
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385 #ifdef DROPBEAR_DSS |
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386 type = DROPBEAR_SIGNKEY_DSS; |
101
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387 ret = readhostkey(svr_opts.dsskeyfile, svr_opts.hostkey, &type); |
47 | 388 if (ret == DROPBEAR_FAILURE) { |
101
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389 disablekey(DROPBEAR_SIGNKEY_DSS, svr_opts.dsskeyfile); |
47 | 390 } |
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391 #endif |
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392 |
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393 if ( 1 |
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394 #ifdef DROPBEAR_DSS |
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395 && svr_opts.hostkey->dsskey == NULL |
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396 #endif |
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397 #ifdef DROPBEAR_RSA |
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398 && svr_opts.hostkey->rsakey == NULL |
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399 #endif |
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400 ) { |
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401 dropbear_exit("No hostkeys available"); |
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402 } |
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403 |
165
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404 TRACE(("leave loadhostkeys")) |
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405 } |