Mercurial > dropbear
annotate svr-runopts.c @ 1347:b28624698130 fuzz
copy over some fuzzing code from AFL branch
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 12 May 2017 23:14:54 +0800 |
parents | 64a50eac1030 |
children | 5c2899e35b63 |
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(const 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" |
946 | 95 "-V Version\n" |
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96 #ifdef DEBUG_TRACE |
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97 "-v verbose (compiled with DEBUG_TRACE)\n" |
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98 #endif |
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99 ,DROPBEAR_VERSION, progname, |
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100 #ifdef DROPBEAR_DSS |
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101 DSS_PRIV_FILENAME, |
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102 #endif |
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103 #ifdef DROPBEAR_RSA |
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104 RSA_PRIV_FILENAME, |
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105 #endif |
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106 #ifdef DROPBEAR_ECDSA |
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107 ECDSA_PRIV_FILENAME, |
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108 #endif |
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109 DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT, DROPBEAR_PIDFILE, |
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110 DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT); |
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111 } |
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112 |
24 | 113 void svr_getopts(int argc, char ** argv) { |
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114 |
1164 | 115 unsigned int i, j; |
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116 char ** next = 0; |
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117 int nextisport = 0; |
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118 char* recv_window_arg = NULL; |
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119 char* keepalive_arg = NULL; |
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120 char* idle_timeout_arg = NULL; |
795 | 121 char* keyfile = NULL; |
1164 | 122 char c; |
795 | 123 |
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124 |
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125 /* see printhelp() for options */ |
24 | 126 svr_opts.bannerfile = NULL; |
127 svr_opts.banner = NULL; | |
128 svr_opts.forkbg = 1; | |
129 svr_opts.norootlogin = 0; | |
130 svr_opts.noauthpass = 0; | |
131 svr_opts.norootpass = 0; | |
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132 svr_opts.allowblankpass = 0; |
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133 svr_opts.inetdmode = 0; |
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134 svr_opts.portcount = 0; |
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135 svr_opts.hostkey = NULL; |
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136 svr_opts.delay_hostkey = 0; |
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137 svr_opts.pidfile = DROPBEAR_PIDFILE; |
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138 #ifdef ENABLE_SVR_LOCALTCPFWD |
258
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139 svr_opts.nolocaltcp = 0; |
271
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140 #endif |
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141 #ifdef ENABLE_SVR_REMOTETCPFWD |
258
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142 svr_opts.noremotetcp = 0; |
271
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143 #endif |
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144 |
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145 #ifndef DISABLE_ZLIB |
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146 #if DROPBEAR_SERVER_DELAY_ZLIB |
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147 opts.compress_mode = DROPBEAR_COMPRESS_DELAYED; |
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148 #else |
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149 opts.compress_mode = DROPBEAR_COMPRESS_ON; |
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150 #endif |
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151 #endif |
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152 |
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153 /* not yet |
33 | 154 opts.ipv4 = 1; |
155 opts.ipv6 = 1; | |
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156 */ |
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157 #ifdef DO_MOTD |
24 | 158 svr_opts.domotd = 1; |
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159 #endif |
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160 #ifndef DISABLE_SYSLOG |
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161 opts.usingsyslog = 1; |
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162 #endif |
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163 opts.recv_window = DEFAULT_RECV_WINDOW; |
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164 opts.keepalive_secs = DEFAULT_KEEPALIVE; |
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165 opts.idle_timeout_secs = DEFAULT_IDLE_TIMEOUT; |
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166 |
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167 #ifdef ENABLE_SVR_REMOTETCPFWD |
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168 opts.listen_fwd_all = 0; |
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169 #endif |
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170 |
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171 for (i = 1; i < (unsigned int)argc; i++) { |
1164 | 172 if (argv[i][0] != '-' || argv[i][1] == '\0') |
173 dropbear_exit("Invalid argument: %s", argv[i]); | |
795 | 174 |
1164 | 175 for (j = 1; (c = argv[i][j]) != '\0' && !next && !nextisport; j++) { |
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176 switch (c) { |
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177 case 'b': |
24 | 178 next = &svr_opts.bannerfile; |
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179 break; |
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180 case 'd': |
795 | 181 case 'r': |
182 next = &keyfile; | |
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183 break; |
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184 case 'R': |
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185 svr_opts.delay_hostkey = 1; |
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186 break; |
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187 case 'F': |
24 | 188 svr_opts.forkbg = 0; |
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189 break; |
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190 #ifndef DISABLE_SYSLOG |
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191 case 'E': |
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192 opts.usingsyslog = 0; |
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193 break; |
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194 #endif |
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195 #ifdef ENABLE_SVR_LOCALTCPFWD |
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196 case 'j': |
258
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197 svr_opts.nolocaltcp = 1; |
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198 break; |
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199 #endif |
271
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200 #ifdef ENABLE_SVR_REMOTETCPFWD |
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201 case 'k': |
258
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202 svr_opts.noremotetcp = 1; |
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203 break; |
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204 case 'a': |
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205 opts.listen_fwd_all = 1; |
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206 break; |
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207 #endif |
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208 #ifdef INETD_MODE |
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209 case 'i': |
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210 svr_opts.inetdmode = 1; |
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211 break; |
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212 #endif |
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213 case 'p': |
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214 nextisport = 1; |
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215 break; |
323
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216 case 'P': |
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217 next = &svr_opts.pidfile; |
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218 break; |
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219 #ifdef DO_MOTD |
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220 /* motd is displayed by default, -m turns it off */ |
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221 case 'm': |
24 | 222 svr_opts.domotd = 0; |
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223 break; |
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224 #endif |
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225 case 'w': |
24 | 226 svr_opts.norootlogin = 1; |
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227 break; |
449
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228 case 'W': |
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229 next = &recv_window_arg; |
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230 break; |
454
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231 case 'K': |
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232 next = &keepalive_arg; |
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233 break; |
513
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234 case 'I': |
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235 next = &idle_timeout_arg; |
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236 break; |
121 | 237 #if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH) |
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238 case 's': |
24 | 239 svr_opts.noauthpass = 1; |
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240 break; |
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241 case 'g': |
24 | 242 svr_opts.norootpass = 1; |
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243 break; |
692
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244 case 'B': |
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245 svr_opts.allowblankpass = 1; |
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246 break; |
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247 #endif |
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248 case 'h': |
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249 printhelp(argv[0]); |
946 | 250 exit(EXIT_SUCCESS); |
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251 break; |
442
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252 case 'u': |
446
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253 /* backwards compatibility with old urandom option */ |
442
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254 break; |
94
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255 #ifdef DEBUG_TRACE |
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256 case 'v': |
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257 debug_trace = 1; |
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258 break; |
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259 #endif |
946 | 260 case 'V': |
948
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261 print_version(); |
946 | 262 exit(EXIT_SUCCESS); |
263 break; | |
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264 default: |
1164 | 265 fprintf(stderr, "Invalid option -%c\n", c); |
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266 printhelp(argv[0]); |
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267 exit(EXIT_FAILURE); |
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268 break; |
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269 } |
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270 } |
1164 | 271 |
272 if (!next && !nextisport) | |
273 continue; | |
274 | |
275 if (c == '\0') { | |
276 i++; | |
277 j = 0; | |
278 if (!argv[i]) { | |
279 dropbear_exit("Missing argument"); | |
280 } | |
281 } | |
282 | |
283 if (nextisport) { | |
284 addportandaddress(&argv[i][j]); | |
285 nextisport = 0; | |
286 } else if (next) { | |
287 *next = &argv[i][j]; | |
288 if (*next == NULL) { | |
289 dropbear_exit("Invalid null argument"); | |
290 } | |
291 next = 0x00; | |
292 | |
293 if (keyfile) { | |
294 addhostkey(keyfile); | |
295 keyfile = NULL; | |
296 } | |
297 } | |
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298 } |
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299 |
101
72dc22f56858
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300 /* Set up listening ports */ |
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301 if (svr_opts.portcount == 0) { |
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302 svr_opts.ports[0] = m_strdup(DROPBEAR_DEFPORT); |
434
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303 svr_opts.addresses[0] = m_strdup(DROPBEAR_DEFADDRESS); |
101
72dc22f56858
Change the way we load keys/ports so we don't print error messages into our
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diff
changeset
|
304 svr_opts.portcount = 1; |
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Change the way we load keys/ports so we don't print error messages into our
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|
305 } |
513
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
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diff
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|
306 |
24 | 307 if (svr_opts.bannerfile) { |
4
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changeset
|
308 struct stat buf; |
24 | 309 if (stat(svr_opts.bannerfile, &buf) != 0) { |
4
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|
310 dropbear_exit("Error opening banner file '%s'", |
24 | 311 svr_opts.bannerfile); |
4
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|
312 } |
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changeset
|
313 |
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changeset
|
314 if (buf.st_size > MAX_BANNER_SIZE) { |
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|
315 dropbear_exit("Banner file too large, max is %d bytes", |
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changeset
|
316 MAX_BANNER_SIZE); |
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|
317 } |
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|
318 |
24 | 319 svr_opts.banner = buf_new(buf.st_size); |
320 if (buf_readfile(svr_opts.banner, svr_opts.bannerfile)!=DROPBEAR_SUCCESS) { | |
4
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changeset
|
321 dropbear_exit("Error reading banner file '%s'", |
24 | 322 svr_opts.bannerfile); |
4
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|
323 } |
24 | 324 buf_setpos(svr_opts.banner, 0); |
4
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|
325 } |
449
3e6c536bc023
Add -W <windowsize> argument and document it.
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diff
changeset
|
326 |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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449
diff
changeset
|
327 if (recv_window_arg) { |
449
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Add -W <windowsize> argument and document it.
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parents:
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diff
changeset
|
328 opts.recv_window = atol(recv_window_arg); |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
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454
diff
changeset
|
329 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
449
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Add -W <windowsize> argument and document it.
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diff
changeset
|
330 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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|
331 } |
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changeset
|
332 } |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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diff
changeset
|
333 |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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diff
changeset
|
334 if (keepalive_arg) { |
568
005530560594
Rearrange getaddrstring() etc
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513
diff
changeset
|
335 unsigned int val; |
005530560594
Rearrange getaddrstring() etc
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diff
changeset
|
336 if (m_str_to_uint(keepalive_arg, &val) == DROPBEAR_FAILURE) { |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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diff
changeset
|
337 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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changeset
|
338 } |
568
005530560594
Rearrange getaddrstring() etc
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diff
changeset
|
339 opts.keepalive_secs = val; |
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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changeset
|
340 } |
513
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
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changeset
|
341 |
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
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510
diff
changeset
|
342 if (idle_timeout_arg) { |
568
005530560594
Rearrange getaddrstring() etc
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parents:
513
diff
changeset
|
343 unsigned int val; |
005530560594
Rearrange getaddrstring() etc
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parents:
513
diff
changeset
|
344 if (m_str_to_uint(idle_timeout_arg, &val) == DROPBEAR_FAILURE) { |
513
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
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diff
changeset
|
345 dropbear_exit("Bad idle_timeout '%s'", idle_timeout_arg); |
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
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changeset
|
346 } |
568
005530560594
Rearrange getaddrstring() etc
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513
diff
changeset
|
347 opts.idle_timeout_secs = val; |
513
a3748e54273c
Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
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parents:
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changeset
|
348 } |
1347
b28624698130
copy over some fuzzing code from AFL branch
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diff
changeset
|
349 |
b28624698130
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diff
changeset
|
350 #ifdef DROPBEAR_FUZZ |
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changeset
|
351 if (opts.fuzz.fuzzing) { |
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diff
changeset
|
352 struct passwd *pw; |
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diff
changeset
|
353 /* user lookups might be slow, cache it */ |
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changeset
|
354 pw = getpwuid(getuid()); |
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diff
changeset
|
355 dropbear_assert(pw); |
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parents:
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diff
changeset
|
356 opts.fuzz.pw_name = m_strdup(pw->pw_name); |
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copy over some fuzzing code from AFL branch
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parents:
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diff
changeset
|
357 opts.fuzz.pw_dir = m_strdup(pw->pw_dir); |
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copy over some fuzzing code from AFL branch
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parents:
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diff
changeset
|
358 opts.fuzz.pw_shell = m_strdup(pw->pw_shell); |
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copy over some fuzzing code from AFL branch
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parents:
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diff
changeset
|
359 opts.fuzz.pw_passwd = m_strdup("!!zzznope"); |
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diff
changeset
|
360 } |
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diff
changeset
|
361 #endif |
4
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changeset
|
362 } |
fe6bca95afa7
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changeset
|
363 |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
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parents:
1177
diff
changeset
|
364 static void addportandaddress(const char* spec) { |
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
365 char *spec_copy = NULL, *myspec = NULL, *port = NULL, *address = NULL; |
434
0aaaf68e97dc
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parents:
271
diff
changeset
|
366 |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
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271
diff
changeset
|
367 if (svr_opts.portcount < DROPBEAR_MAX_PORTS) { |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
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parents:
271
diff
changeset
|
368 |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
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parents:
271
diff
changeset
|
369 /* We don't free it, it becomes part of the runopt state */ |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
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parents:
1177
diff
changeset
|
370 spec_copy = m_strdup(spec); |
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
371 myspec = spec_copy; |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
372 |
706
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
373 if (myspec[0] == '[') { |
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
374 myspec++; |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
375 port = strchr(myspec, ']'); |
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
376 if (!port) { |
706
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
377 /* Unmatched [ -> exit */ |
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
378 dropbear_exit("Bad listen address"); |
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
379 } |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
380 port[0] = '\0'; |
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
381 port++; |
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
382 if (port[0] != ':') { |
706
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
383 /* Missing port -> exit */ |
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
384 dropbear_exit("Missing port"); |
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
385 } |
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
386 } else { |
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
387 /* search for ':', that separates address and port */ |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
388 port = strrchr(myspec, ':'); |
706
002cf09827c0
Allow specifying server "-p" options with ipv6 bracket notation,
Matt Johnston <matt@ucc.asn.au>
parents:
692
diff
changeset
|
389 } |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
390 |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
391 if (!port) { |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
392 /* no ':' -> the whole string specifies just a port */ |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
393 port = myspec; |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
394 } else { |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
395 /* Split the address/port */ |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
396 port[0] = '\0'; |
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
397 port++; |
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
398 address = myspec; |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
399 } |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
400 |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
401 if (!address) { |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
402 /* no address given -> fill in the default address */ |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
403 address = DROPBEAR_DEFADDRESS; |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
404 } |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
405 |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
406 if (port[0] == '\0') { |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
407 /* empty port -> exit */ |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
408 dropbear_exit("Bad port"); |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
409 } |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
410 svr_opts.ports[svr_opts.portcount] = m_strdup(port); |
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
411 svr_opts.addresses[svr_opts.portcount] = m_strdup(address); |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
412 svr_opts.portcount++; |
1197
86a9e0204c03
ports and addresses must be malloced to avoid segfault on exit
Matt Johnston <matt@ucc.asn.au>
parents:
1177
diff
changeset
|
413 m_free(spec_copy); |
434
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
414 } |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
415 } |
0aaaf68e97dc
Add -p [address:]port option for binding to addresses, patch from
Matt Johnston <matt@ucc.asn.au>
parents:
271
diff
changeset
|
416 |
795 | 417 static void disablekey(int type) { |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
418 int i; |
802 | 419 TRACE(("Disabling key type %d", type)) |
47 | 420 for (i = 0; sshhostkey[i].name != NULL; i++) { |
421 if (sshhostkey[i].val == type) { | |
802 | 422 sshhostkey[i].usable = 0; |
47 | 423 break; |
424 } | |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
425 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
426 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
427 |
807
75509065db53
have separate ecdsa keys for each size
Matt Johnston <matt@ucc.asn.au>
parents:
802
diff
changeset
|
428 static void loadhostkey_helper(const char *name, void** src, void** dst, int fatal_duplicate) { |
75509065db53
have separate ecdsa keys for each size
Matt Johnston <matt@ucc.asn.au>
parents:
802
diff
changeset
|
429 if (*dst) { |
75509065db53
have separate ecdsa keys for each size
Matt Johnston <matt@ucc.asn.au>
parents:
802
diff
changeset
|
430 if (fatal_duplicate) { |
75509065db53
have separate ecdsa keys for each size
Matt Johnston <matt@ucc.asn.au>
parents:
802
diff
changeset
|
431 dropbear_exit("Only one %s key can be specified", name); |
75509065db53
have separate ecdsa keys for each size
Matt Johnston <matt@ucc.asn.au>
parents:
802
diff
changeset
|
432 } |
75509065db53
have separate ecdsa keys for each size
Matt Johnston <matt@ucc.asn.au>
parents:
802
diff
changeset
|
433 } else { |
75509065db53
have separate ecdsa keys for each size
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434 *dst = *src; |
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435 *src = NULL; |
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436 } |
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437 |
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438 } |
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439 |
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440 /* Must be called after syslog/etc is working */ |
795 | 441 static void loadhostkey(const char *keyfile, int fatal_duplicate) { |
442 sign_key * read_key = new_sign_key(); | |
847
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443 enum signkey_type type = DROPBEAR_SIGNKEY_ANY; |
795 | 444 if (readhostkey(keyfile, read_key, &type) == DROPBEAR_FAILURE) { |
976
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445 if (!svr_opts.delay_hostkey) { |
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446 dropbear_log(LOG_WARNING, "Failed loading %s", keyfile); |
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447 } |
795 | 448 } |
449 | |
450 #ifdef DROPBEAR_RSA | |
451 if (type == DROPBEAR_SIGNKEY_RSA) { | |
852
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452 loadhostkey_helper("RSA", (void**)&read_key->rsakey, (void**)&svr_opts.hostkey->rsakey, fatal_duplicate); |
795 | 453 } |
454 #endif | |
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455 |
795 | 456 #ifdef DROPBEAR_DSS |
457 if (type == DROPBEAR_SIGNKEY_DSS) { | |
852
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458 loadhostkey_helper("DSS", (void**)&read_key->dsskey, (void**)&svr_opts.hostkey->dsskey, fatal_duplicate); |
795 | 459 } |
460 #endif | |
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461 |
795 | 462 #ifdef DROPBEAR_ECDSA |
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463 #ifdef DROPBEAR_ECC_256 |
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464 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP256) { |
852
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465 loadhostkey_helper("ECDSA256", (void**)&read_key->ecckey256, (void**)&svr_opts.hostkey->ecckey256, fatal_duplicate); |
795 | 466 } |
467 #endif | |
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468 #ifdef DROPBEAR_ECC_384 |
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469 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP384) { |
852
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470 loadhostkey_helper("ECDSA384", (void**)&read_key->ecckey384, (void**)&svr_opts.hostkey->ecckey384, fatal_duplicate); |
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471 } |
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472 #endif |
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473 #ifdef DROPBEAR_ECC_521 |
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474 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) { |
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475 loadhostkey_helper("ECDSA521", (void**)&read_key->ecckey521, (void**)&svr_opts.hostkey->ecckey521, fatal_duplicate); |
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476 } |
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477 #endif |
857 | 478 #endif /* DROPBEAR_ECDSA */ |
795 | 479 sign_key_free(read_key); |
480 TRACE(("leave loadhostkey")) | |
481 } | |
482 | |
483 static void addhostkey(const char *keyfile) { | |
484 if (svr_opts.num_hostkey_files >= MAX_HOSTKEYS) { | |
485 dropbear_exit("Too many hostkeys"); | |
486 } | |
487 svr_opts.hostkey_files[svr_opts.num_hostkey_files] = m_strdup(keyfile); | |
488 svr_opts.num_hostkey_files++; | |
489 } | |
490 | |
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491 #ifdef DROPBEAR_FUZZ |
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492 static void load_fixed_hostkeys() { |
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493 #include "hostkeys.c" |
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494 |
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495 buffer *b = buf_new(3000); |
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496 enum signkey_type type; |
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497 |
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498 TRACE(("load fixed hostkeys")) |
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499 |
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500 svr_opts.hostkey = new_sign_key(); |
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501 |
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502 buf_setlen(b, 0); |
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503 buf_putbytes(b, keyr, keyr_len); |
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504 buf_setpos(b, 0); |
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505 type = DROPBEAR_SIGNKEY_RSA; |
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506 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) { |
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507 dropbear_exit("failed fixed rsa hostkey"); |
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508 } |
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509 |
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510 buf_setlen(b, 0); |
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511 buf_putbytes(b, keyd, keyd_len); |
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512 buf_setpos(b, 0); |
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513 type = DROPBEAR_SIGNKEY_DSS; |
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514 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) { |
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515 dropbear_exit("failed fixed dss hostkey"); |
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516 } |
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517 |
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518 buf_setlen(b, 0); |
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519 buf_putbytes(b, keye, keye_len); |
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520 buf_setpos(b, 0); |
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521 type = DROPBEAR_SIGNKEY_ECDSA_NISTP256; |
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522 if (buf_get_priv_key(b, svr_opts.hostkey, &type) == DROPBEAR_FAILURE) { |
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523 dropbear_exit("failed fixed ecdsa hostkey"); |
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524 } |
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525 |
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526 buf_free(b); |
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527 } |
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528 #endif // DROPBEAR_FUZZ |
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529 |
795 | 530 void load_all_hostkeys() { |
531 int i; | |
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532 int disable_unset_keys = 1; |
873
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533 int any_keys = 0; |
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534 |
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535 #ifdef DROPBEAR_FUZZ |
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536 if (opts.fuzz.fuzzing) { |
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537 load_fixed_hostkeys(); |
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538 return; |
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539 } |
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540 #endif |
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541 |
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542 svr_opts.hostkey = new_sign_key(); |
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543 |
795 | 544 for (i = 0; i < svr_opts.num_hostkey_files; i++) { |
545 char *hostkey_file = svr_opts.hostkey_files[i]; | |
546 loadhostkey(hostkey_file, 1); | |
547 m_free(hostkey_file); | |
548 } | |
549 | |
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550 #ifdef DROPBEAR_RSA |
795 | 551 loadhostkey(RSA_PRIV_FILENAME, 0); |
552 #endif | |
553 | |
554 #ifdef DROPBEAR_DSS | |
555 loadhostkey(DSS_PRIV_FILENAME, 0); | |
556 #endif | |
557 | |
558 #ifdef DROPBEAR_ECDSA | |
559 loadhostkey(ECDSA_PRIV_FILENAME, 0); | |
560 #endif | |
561 | |
847
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562 #ifdef DROPBEAR_DELAY_HOSTKEY |
876 | 563 if (svr_opts.delay_hostkey) { |
847
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564 disable_unset_keys = 0; |
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565 } |
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566 #endif |
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567 |
795 | 568 #ifdef DROPBEAR_RSA |
847
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569 if (disable_unset_keys && !svr_opts.hostkey->rsakey) { |
795 | 570 disablekey(DROPBEAR_SIGNKEY_RSA); |
876 | 571 } else { |
873
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572 any_keys = 1; |
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573 } |
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574 #endif |
847
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575 |
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576 #ifdef DROPBEAR_DSS |
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577 if (disable_unset_keys && !svr_opts.hostkey->dsskey) { |
876 | 578 disablekey(DROPBEAR_SIGNKEY_DSS); |
579 } else { | |
873
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580 any_keys = 1; |
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581 } |
795 | 582 #endif |
847
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583 |
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584 |
795 | 585 #ifdef DROPBEAR_ECDSA |
586 #ifdef DROPBEAR_ECC_256 | |
847
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587 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 256) |
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588 && !svr_opts.hostkey->ecckey256) { |
795 | 589 disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP256); |
876 | 590 } else { |
873
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591 any_keys = 1; |
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592 } |
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593 #endif |
847
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594 |
795 | 595 #ifdef DROPBEAR_ECC_384 |
847
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596 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 384) |
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597 && !svr_opts.hostkey->ecckey384) { |
795 | 598 disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP384); |
876 | 599 } else { |
873
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600 any_keys = 1; |
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601 } |
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602 #endif |
847
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603 |
795 | 604 #ifdef DROPBEAR_ECC_521 |
847
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605 if ((disable_unset_keys || ECDSA_DEFAULT_SIZE != 521) |
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606 && !svr_opts.hostkey->ecckey521) { |
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607 disablekey(DROPBEAR_SIGNKEY_ECDSA_NISTP521); |
876 | 608 } else { |
873
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609 any_keys = 1; |
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610 } |
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611 #endif |
847
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612 #endif /* DROPBEAR_ECDSA */ |
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613 |
876 | 614 if (!any_keys) { |
1177 | 615 dropbear_exit("No hostkeys available. 'dropbear -R' may be useful or run dropbearkey."); |
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616 } |
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617 } |