Mercurial > dropbear
annotate dbutil.c @ 546:568638be7203 agent-client
propagate from branch 'au.asn.ucc.matt.dropbear' (head 899a8851a5edf840b2f7925bcc26ffe99dcac54d)
to branch 'au.asn.ucc.matt.dropbear.cli-agent' (head 6bbab8364de17bd9ecb1dee5ffb796e48c0380d2)
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 01 Jul 2009 04:16:32 +0000 |
| parents | d588e3ea557a |
| children | cf376c696dfc |
| 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 * strlcat() is copyright as follows: |
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26 * Copyright (c) 1998 Todd C. Miller <[email protected]> |
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27 * All rights reserved. |
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28 * |
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29 * Redistribution and use in source and binary forms, with or without |
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30 * modification, are permitted provided that the following conditions |
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31 * are met: |
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32 * 1. Redistributions of source code must retain the above copyright |
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33 * notice, this list of conditions and the following disclaimer. |
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34 * 2. Redistributions in binary form must reproduce the above copyright |
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35 * notice, this list of conditions and the following disclaimer in the |
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36 * documentation and/or other materials provided with the distribution. |
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37 * 3. The name of the author may not be used to endorse or promote products |
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38 * derived from this software without specific prior written permission. |
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39 * |
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40 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
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42 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
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43 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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44 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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45 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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46 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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47 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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48 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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49 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ |
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50 |
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51 #include "includes.h" |
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52 #include "dbutil.h" |
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53 #include "buffer.h" |
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54 #include "session.h" |
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55 #include "atomicio.h" |
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56 |
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57 #define MAX_FMT 100 |
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58 |
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59 static void generic_dropbear_exit(int exitcode, const char* format, |
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60 va_list param); |
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61 static void generic_dropbear_log(int priority, const char* format, |
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62 va_list param); |
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63 |
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64 void (*_dropbear_exit)(int exitcode, const char* format, va_list param) |
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65 = generic_dropbear_exit; |
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66 void (*_dropbear_log)(int priority, const char* format, va_list param) |
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67 = generic_dropbear_log; |
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68 |
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69 #ifdef DEBUG_TRACE |
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70 int debug_trace = 0; |
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71 #endif |
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72 |
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73 #ifndef DISABLE_SYSLOG |
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74 void startsyslog() { |
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75 |
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76 openlog(PROGNAME, LOG_PID, LOG_AUTHPRIV); |
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77 |
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78 } |
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79 #endif /* DISABLE_SYSLOG */ |
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80 |
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81 /* the "format" string must be <= 100 characters */ |
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82 void dropbear_close(const char* format, ...) { |
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83 |
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84 va_list param; |
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85 |
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86 va_start(param, format); |
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87 _dropbear_exit(EXIT_SUCCESS, format, param); |
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88 va_end(param); |
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89 |
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90 } |
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91 |
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92 void dropbear_exit(const char* format, ...) { |
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93 |
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94 va_list param; |
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95 |
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96 va_start(param, format); |
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97 _dropbear_exit(EXIT_FAILURE, format, param); |
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98 va_end(param); |
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99 } |
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100 |
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101 static void generic_dropbear_exit(int exitcode, const char* format, |
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102 va_list param) { |
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103 |
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104 char fmtbuf[300]; |
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105 |
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106 snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", format); |
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107 |
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108 _dropbear_log(LOG_INFO, fmtbuf, param); |
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109 |
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110 exit(exitcode); |
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111 } |
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112 |
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113 void fail_assert(const char* expr, const char* file, int line) { |
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114 dropbear_exit("failed assertion (%s:%d): `%s'", file, line, expr); |
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115 } |
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116 |
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117 static void generic_dropbear_log(int UNUSED(priority), const char* format, |
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118 va_list param) { |
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119 |
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120 char printbuf[1024]; |
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121 |
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122 vsnprintf(printbuf, sizeof(printbuf), format, param); |
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123 |
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124 fprintf(stderr, "%s\n", printbuf); |
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125 |
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126 } |
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127 |
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128 /* this is what can be called to write arbitrary log messages */ |
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129 void dropbear_log(int priority, const char* format, ...) { |
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130 |
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131 va_list param; |
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132 |
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133 va_start(param, format); |
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134 _dropbear_log(priority, format, param); |
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135 va_end(param); |
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136 } |
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137 |
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138 |
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139 #ifdef DEBUG_TRACE |
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140 void dropbear_trace(const char* format, ...) { |
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141 |
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142 va_list param; |
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143 |
|
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144 if (!debug_trace) { |
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145 return; |
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146 } |
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147 |
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148 va_start(param, format); |
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149 fprintf(stderr, "TRACE (%d): ", getpid()); |
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150 vfprintf(stderr, format, param); |
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151 fprintf(stderr, "\n"); |
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152 va_end(param); |
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153 } |
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154 #endif /* DEBUG_TRACE */ |
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155 |
|
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156 static void set_sock_priority(int sock) { |
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157 |
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158 int val; |
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159 |
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160 /* disable nagle */ |
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161 val = 1; |
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162 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val)); |
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163 |
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164 /* set the TOS bit. note that this will fail for ipv6, I can't find any |
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165 * equivalent. */ |
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166 #ifdef IPTOS_LOWDELAY |
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167 val = IPTOS_LOWDELAY; |
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168 setsockopt(sock, IPPROTO_IP, IP_TOS, (void*)&val, sizeof(val)); |
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169 #endif |
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170 |
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171 #ifdef SO_PRIORITY |
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172 /* linux specific, sets QoS class. |
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173 * 6 looks to be optimal for interactive traffic (see tc-prio(8) ). */ |
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174 val = 6; |
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175 setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &val, sizeof(val)); |
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176 #endif |
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177 |
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178 } |
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179 |
|
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180 /* Listen on address:port. |
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181 * Special cases are address of "" listening on everything, |
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182 * and address of NULL listening on localhost only. |
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183 * Returns the number of sockets bound on success, or -1 on failure. On |
| 62 | 184 * failure, if errstring wasn't NULL, it'll be a newly malloced error |
| 185 * string.*/ | |
| 186 int dropbear_listen(const char* address, const char* port, | |
| 187 int *socks, unsigned int sockcount, char **errstring, int *maxfd) { | |
| 188 | |
|
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189 struct addrinfo hints, *res = NULL, *res0 = NULL; |
| 62 | 190 int err; |
| 191 unsigned int nsock; | |
| 192 struct linger linger; | |
| 193 int val; | |
| 194 int sock; | |
| 195 | |
|
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196 TRACE(("enter dropbear_listen")) |
| 62 | 197 |
| 198 memset(&hints, 0, sizeof(hints)); | |
| 199 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */ | |
| 200 hints.ai_socktype = SOCK_STREAM; | |
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201 |
|
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202 /* for calling getaddrinfo: |
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203 address == NULL and !AI_PASSIVE: local loopback |
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204 address == NULL and AI_PASSIVE: all interfaces |
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205 address != NULL: whatever the address says */ |
|
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206 if (!address) { |
|
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207 TRACE(("dropbear_listen: local loopback")) |
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208 } else { |
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209 if (address[0] == '\0') { |
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210 TRACE(("dropbear_listen: all interfaces")) |
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211 address = NULL; |
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212 } |
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213 hints.ai_flags = AI_PASSIVE; |
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214 } |
| 62 | 215 err = getaddrinfo(address, port, &hints, &res0); |
| 216 | |
| 217 if (err) { | |
| 218 if (errstring != NULL && *errstring == NULL) { | |
| 219 int len; | |
| 220 len = 20 + strlen(gai_strerror(err)); | |
| 221 *errstring = (char*)m_malloc(len); | |
| 222 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err)); | |
| 223 } | |
|
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224 if (res0) { |
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225 freeaddrinfo(res0); |
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226 res0 = NULL; |
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227 } |
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228 TRACE(("leave dropbear_listen: failed resolving")) |
| 62 | 229 return -1; |
| 230 } | |
| 231 | |
| 232 | |
| 233 nsock = 0; | |
| 234 for (res = res0; res != NULL && nsock < sockcount; | |
| 235 res = res->ai_next) { | |
| 236 | |
| 237 /* Get a socket */ | |
| 238 socks[nsock] = socket(res->ai_family, res->ai_socktype, | |
| 239 res->ai_protocol); | |
| 240 | |
| 241 sock = socks[nsock]; /* For clarity */ | |
| 242 | |
| 243 if (sock < 0) { | |
| 244 err = errno; | |
|
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245 TRACE(("socket() failed")) |
| 62 | 246 continue; |
| 247 } | |
| 248 | |
| 249 /* Various useful socket options */ | |
| 250 val = 1; | |
| 251 /* set to reuse, quick timeout */ | |
| 252 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val)); | |
| 253 linger.l_onoff = 1; | |
| 254 linger.l_linger = 5; | |
| 255 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger)); | |
| 256 | |
|
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257 set_sock_priority(sock); |
| 62 | 258 |
| 259 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) { | |
| 260 err = errno; | |
| 261 close(sock); | |
|
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262 TRACE(("bind(%s) failed", port)) |
| 62 | 263 continue; |
| 264 } | |
| 265 | |
| 266 if (listen(sock, 20) < 0) { | |
| 267 err = errno; | |
| 268 close(sock); | |
|
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269 TRACE(("listen() failed")) |
| 62 | 270 continue; |
| 271 } | |
| 272 | |
| 273 *maxfd = MAX(*maxfd, sock); | |
| 274 | |
| 275 nsock++; | |
| 276 } | |
| 277 | |
|
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278 if (res0) { |
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279 freeaddrinfo(res0); |
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280 res0 = NULL; |
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281 } |
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282 |
| 62 | 283 if (nsock == 0) { |
| 284 if (errstring != NULL && *errstring == NULL) { | |
| 285 int len; | |
| 286 len = 20 + strlen(strerror(err)); | |
| 287 *errstring = (char*)m_malloc(len); | |
| 64 | 288 snprintf(*errstring, len, "Error listening: %s", strerror(err)); |
| 62 | 289 } |
|
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290 TRACE(("leave dropbear_listen: failure, %s", strerror(err))) |
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291 return -1; |
| 62 | 292 } |
| 293 | |
|
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294 TRACE(("leave dropbear_listen: success, %d socks bound", nsock)) |
| 62 | 295 return nsock; |
| 296 } | |
| 297 | |
|
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298 /* Connect to a given unix socket. The socket is not non-blocking */ |
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299 #ifdef ENABLE_CONNECT_UNIX |
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300 int connect_unix(const char* addr) |
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301 { |
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302 struct sockaddr_un egdsock; |
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303 int fd = -1; |
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304 |
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305 memset((void*)&egdsock, 0x0, sizeof(egdsock)); |
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306 egdsock.sun_family = AF_UNIX; |
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307 strlcpy(egdsock.sun_path, addr, sizeof(egdsock.sun_path)); |
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308 |
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309 fd = socket(PF_UNIX, SOCK_STREAM, 0); |
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310 |
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311 return fd; |
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312 } |
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313 #endif |
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314 |
| 26 | 315 /* Connect via TCP to a host. Connection will try ipv4 or ipv6, will |
| 62 | 316 * return immediately if nonblocking is set. On failure, if errstring |
| 317 * wasn't null, it will be a newly malloced error message */ | |
| 318 | |
| 319 /* TODO: maxfd */ | |
| 26 | 320 int connect_remote(const char* remotehost, const char* remoteport, |
| 321 int nonblocking, char ** errstring) { | |
| 322 | |
| 323 struct addrinfo *res0 = NULL, *res = NULL, hints; | |
| 324 int sock; | |
| 325 int err; | |
| 326 | |
|
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327 TRACE(("enter connect_remote")) |
| 26 | 328 |
| 329 if (errstring != NULL) { | |
| 330 *errstring = NULL; | |
| 331 } | |
| 332 | |
| 333 memset(&hints, 0, sizeof(hints)); | |
| 334 hints.ai_socktype = SOCK_STREAM; | |
| 335 hints.ai_family = PF_UNSPEC; | |
| 336 | |
| 337 err = getaddrinfo(remotehost, remoteport, &hints, &res0); | |
| 338 if (err) { | |
| 339 if (errstring != NULL && *errstring == NULL) { | |
| 340 int len; | |
|
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341 len = 100 + strlen(gai_strerror(err)); |
| 26 | 342 *errstring = (char*)m_malloc(len); |
|
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343 snprintf(*errstring, len, "Error resolving '%s' port '%s'. %s", |
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344 remotehost, remoteport, gai_strerror(err)); |
| 26 | 345 } |
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346 TRACE(("Error resolving: %s", gai_strerror(err))) |
| 26 | 347 return -1; |
| 348 } | |
| 349 | |
| 350 sock = -1; | |
| 351 err = EADDRNOTAVAIL; | |
| 352 for (res = res0; res; res = res->ai_next) { | |
| 353 | |
| 354 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); | |
| 355 if (sock < 0) { | |
| 356 err = errno; | |
| 357 continue; | |
| 358 } | |
| 359 | |
| 360 if (nonblocking) { | |
|
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361 setnonblocking(sock); |
| 26 | 362 } |
| 363 | |
| 364 if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) { | |
|
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365 if (errno == EINPROGRESS && nonblocking) { |
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366 TRACE(("Connect in progress")) |
| 26 | 367 break; |
| 368 } else { | |
| 369 err = errno; | |
| 370 close(sock); | |
| 371 sock = -1; | |
| 372 continue; | |
| 373 } | |
| 374 } | |
| 375 | |
| 376 break; /* Success */ | |
| 377 } | |
| 378 | |
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379 if (sock < 0 && !(errno == EINPROGRESS && nonblocking)) { |
| 26 | 380 /* Failed */ |
| 381 if (errstring != NULL && *errstring == NULL) { | |
| 382 int len; | |
| 383 len = 20 + strlen(strerror(err)); | |
| 384 *errstring = (char*)m_malloc(len); | |
| 385 snprintf(*errstring, len, "Error connecting: %s", strerror(err)); | |
| 386 } | |
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387 TRACE(("Error connecting: %s", strerror(err))) |
| 26 | 388 } else { |
| 389 /* Success */ | |
|
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390 set_sock_priority(sock); |
| 26 | 391 } |
| 392 | |
| 393 freeaddrinfo(res0); | |
| 62 | 394 if (sock > 0 && errstring != NULL && *errstring != NULL) { |
| 395 m_free(*errstring); | |
| 396 } | |
| 26 | 397 |
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398 TRACE(("leave connect_remote: sock %d\n", sock)) |
| 26 | 399 return sock; |
| 400 } | |
| 401 | |
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402 /* Sets up a pipe for a, returning three non-blocking file descriptors |
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403 * and the pid. exec_fn is the function that will actually execute the child process, |
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404 * it will be run after the child has fork()ed, and is passed exec_data. |
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405 * If ret_errfd == NULL then stderr will not be captured. |
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406 * ret_pid can be passed as NULL to discard the pid. */ |
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407 int spawn_command(void(*exec_fn)(void *user_data), void *exec_data, |
|
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408 int *ret_writefd, int *ret_readfd, int *ret_errfd, pid_t *ret_pid) { |
|
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409 int infds[2]; |
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410 int outfds[2]; |
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411 int errfds[2]; |
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412 pid_t pid; |
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413 |
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414 const int FDIN = 0; |
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415 const int FDOUT = 1; |
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416 |
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417 /* redirect stdin/stdout/stderr */ |
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418 if (pipe(infds) != 0) { |
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419 return DROPBEAR_FAILURE; |
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420 } |
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421 if (pipe(outfds) != 0) { |
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422 return DROPBEAR_FAILURE; |
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423 } |
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424 if (ret_errfd && pipe(errfds) != 0) { |
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425 return DROPBEAR_FAILURE; |
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426 } |
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427 |
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428 #ifdef __uClinux__ |
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429 pid = vfork(); |
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430 #else |
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431 pid = fork(); |
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432 #endif |
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433 |
|
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434 if (pid < 0) { |
|
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435 return DROPBEAR_FAILURE; |
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436 } |
|
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|
437 |
|
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|
438 if (!pid) { |
|
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|
439 /* child */ |
|
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440 |
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|
441 TRACE(("back to normal sigchld")) |
|
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442 /* Revert to normal sigchld handling */ |
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443 if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) { |
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444 dropbear_exit("signal() error"); |
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445 } |
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446 |
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447 /* redirect stdin/stdout */ |
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448 |
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449 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) || |
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450 (dup2(outfds[FDOUT], STDOUT_FILENO) < 0) || |
|
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451 (ret_errfd && dup2(errfds[FDOUT], STDERR_FILENO) < 0)) { |
|
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452 TRACE(("leave noptycommand: error redirecting FDs")) |
|
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453 dropbear_exit("child dup2() failure"); |
|
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454 } |
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455 |
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456 close(infds[FDOUT]); |
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457 close(infds[FDIN]); |
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458 close(outfds[FDIN]); |
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459 close(outfds[FDOUT]); |
|
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460 if (ret_errfd) |
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461 { |
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462 close(errfds[FDIN]); |
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463 close(errfds[FDOUT]); |
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464 } |
|
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465 |
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466 exec_fn(exec_data); |
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467 /* not reached */ |
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468 return DROPBEAR_FAILURE; |
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|
469 } else { |
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|
470 /* parent */ |
|
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471 close(infds[FDIN]); |
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472 close(outfds[FDOUT]); |
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473 |
|
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474 setnonblocking(outfds[FDIN]); |
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475 setnonblocking(infds[FDOUT]); |
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476 |
|
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477 if (ret_errfd) { |
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478 close(errfds[FDOUT]); |
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479 setnonblocking(errfds[FDIN]); |
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480 } |
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481 |
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482 if (ret_pid) { |
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483 *ret_pid = pid; |
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484 } |
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485 |
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481
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486 *ret_writefd = infds[FDOUT]; |
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487 *ret_readfd = outfds[FDIN]; |
|
484
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488 if (ret_errfd) { |
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489 *ret_errfd = errfds[FDIN]; |
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490 } |
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481
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491 return DROPBEAR_SUCCESS; |
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492 } |
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493 } |
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494 |
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482
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495 /* Runs a command with "sh -c". Will close FDs (except stdin/stdout/stderr) and |
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496 * re-enabled SIGPIPE. If cmd is NULL, will run a login shell. |
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497 */ |
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498 void run_shell_command(const char* cmd, unsigned int maxfd, char* usershell) { |
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499 char * argv[4]; |
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500 char * baseshell = NULL; |
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501 unsigned int i; |
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502 |
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503 baseshell = basename(usershell); |
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504 |
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505 if (cmd != NULL) { |
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506 argv[0] = baseshell; |
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507 } else { |
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508 /* a login shell should be "-bash" for "/bin/bash" etc */ |
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509 int len = strlen(baseshell) + 2; /* 2 for "-" */ |
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510 argv[0] = (char*)m_malloc(len); |
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511 snprintf(argv[0], len, "-%s", baseshell); |
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512 } |
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513 |
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514 if (cmd != NULL) { |
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515 argv[1] = "-c"; |
|
492
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516 argv[2] = (char*)cmd; |
|
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517 argv[3] = NULL; |
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518 } else { |
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519 /* construct a shell of the form "-bash" etc */ |
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520 argv[1] = NULL; |
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521 } |
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522 |
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523 /* Re-enable SIGPIPE for the executed process */ |
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524 if (signal(SIGPIPE, SIG_DFL) == SIG_ERR) { |
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525 dropbear_exit("signal() error"); |
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526 } |
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527 |
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528 /* close file descriptors except stdin/stdout/stderr |
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529 * Need to be sure FDs are closed here to avoid reading files as root */ |
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530 for (i = 3; i <= maxfd; i++) { |
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531 m_close(i); |
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532 } |
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533 |
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534 execv(usershell, argv); |
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535 } |
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536 |
|
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537 /* Return a string representation of the socket address passed. The return |
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538 * value is allocated with malloc() */ |
| 62 | 539 unsigned char * getaddrstring(struct sockaddr_storage* addr, int withport) { |
|
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540 |
| 62 | 541 char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV]; |
| 542 char *retstring = NULL; | |
| 543 int ret; | |
| 544 unsigned int len; | |
|
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545 |
| 62 | 546 len = sizeof(struct sockaddr_storage); |
|
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547 /* Some platforms such as Solaris 8 require that len is the length |
|
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548 * of the specific structure. Some older linux systems (glibc 2.1.3 |
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549 * such as debian potato) have sockaddr_storage.__ss_family instead |
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550 * but we'll ignore them */ |
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551 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY |
|
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552 if (addr->ss_family == AF_INET) { |
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553 len = sizeof(struct sockaddr_in); |
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554 } |
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555 #ifdef AF_INET6 |
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556 if (addr->ss_family == AF_INET6) { |
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557 len = sizeof(struct sockaddr_in6); |
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558 } |
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559 #endif |
|
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560 #endif |
| 62 | 561 |
| 562 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), | |
| 563 sbuf, sizeof(sbuf), NI_NUMERICSERV | NI_NUMERICHOST); | |
|
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564 |
| 62 | 565 if (ret != 0) { |
| 566 /* This is a fairly bad failure - it'll fallback to IP if it | |
| 567 * just can't resolve */ | |
| 568 dropbear_exit("failed lookup (%d, %d)", ret, errno); | |
| 569 } | |
|
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570 |
| 62 | 571 if (withport) { |
| 572 len = strlen(hbuf) + 2 + strlen(sbuf); | |
| 573 retstring = (char*)m_malloc(len); | |
| 574 snprintf(retstring, len, "%s:%s", hbuf, sbuf); | |
| 575 } else { | |
| 576 retstring = m_strdup(hbuf); | |
| 577 } | |
|
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578 |
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579 return retstring; |
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580 |
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581 } |
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582 |
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583 /* Get the hostname corresponding to the address addr. On failure, the IP |
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584 * address is returned. The return value is allocated with strdup() */ |
| 62 | 585 char* getaddrhostname(struct sockaddr_storage * addr) { |
|
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586 |
| 62 | 587 char hbuf[NI_MAXHOST]; |
| 588 char sbuf[NI_MAXSERV]; | |
| 589 int ret; | |
| 590 unsigned int len; | |
|
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591 #ifdef DO_HOST_LOOKUP |
|
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592 const int flags = NI_NUMERICSERV; |
|
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593 #else |
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594 const int flags = NI_NUMERICHOST | NI_NUMERICSERV; |
|
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595 #endif |
| 62 | 596 |
| 597 len = sizeof(struct sockaddr_storage); | |
|
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598 /* Some platforms such as Solaris 8 require that len is the length |
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599 * of the specific structure. */ |
|
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600 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY |
|
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601 if (addr->ss_family == AF_INET) { |
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602 len = sizeof(struct sockaddr_in); |
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603 } |
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604 #ifdef AF_INET6 |
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605 if (addr->ss_family == AF_INET6) { |
|
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606 len = sizeof(struct sockaddr_in6); |
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607 } |
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608 #endif |
|
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609 #endif |
|
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610 |
|
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611 |
| 62 | 612 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), |
|
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613 sbuf, sizeof(sbuf), flags); |
| 62 | 614 |
| 615 if (ret != 0) { | |
| 616 /* On some systems (Darwin does it) we get EINTR from getnameinfo | |
| 617 * somehow. Eew. So we'll just return the IP, since that doesn't seem | |
| 618 * to exhibit that behaviour. */ | |
| 619 return getaddrstring(addr, 0); | |
|
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|
620 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
621 |
| 62 | 622 return m_strdup(hbuf); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
623 } |
| 62 | 624 |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
625 #ifdef DEBUG_TRACE |
|
198
65585699d980
* add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents:
173
diff
changeset
|
626 void printhex(const char * label, const unsigned char * buf, int len) { |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
627 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
628 int i; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
629 |
|
198
65585699d980
* add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents:
173
diff
changeset
|
630 fprintf(stderr, "%s\n", label); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
631 for (i = 0; i < len; i++) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
632 fprintf(stderr, "%02x", buf[i]); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
633 if (i % 16 == 15) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
634 fprintf(stderr, "\n"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
635 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
636 else if (i % 2 == 1) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
637 fprintf(stderr, " "); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
638 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
639 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
640 fprintf(stderr, "\n"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
641 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
642 #endif |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
643 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
644 /* Strip all control characters from text (a null-terminated string), except |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
645 * for '\n', '\r' and '\t'. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
646 * The result returned is a newly allocated string, this must be free()d after |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
647 * use */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
648 char * stripcontrol(const char * text) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
649 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
650 char * ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
651 int len, pos; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
652 int i; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
653 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
654 len = strlen(text); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
655 ret = m_malloc(len+1); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
656 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
657 pos = 0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
658 for (i = 0; i < len; i++) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
659 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
660 || text[i] == '\n' || text[i] == '\r' || text[i] == '\t') { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
661 ret[pos] = text[i]; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
662 pos++; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
663 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
664 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
665 ret[pos] = 0x0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
666 return ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
667 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
668 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
669 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
670 /* reads the contents of filename into the buffer buf, from the current |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
671 * position, either to the end of the file, or the buffer being full. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
672 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
673 int buf_readfile(buffer* buf, const char* filename) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
674 |
|
357
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
675 int fd = -1; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
676 int len; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
677 int maxlen; |
|
358
e81d3bc1dc78
Forgot variable declaration.
Matt Johnston <matt@ucc.asn.au>
parents:
357
diff
changeset
|
678 int ret = DROPBEAR_FAILURE; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
679 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
680 fd = open(filename, O_RDONLY); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
681 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
682 if (fd < 0) { |
|
357
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
683 goto out; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
684 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
685 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
686 do { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
687 maxlen = buf->size - buf->pos; |
|
357
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
688 len = read(fd, buf_getwriteptr(buf, maxlen), maxlen); |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
689 if (len < 0) { |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
690 if (errno == EINTR || errno == EAGAIN) { |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
691 continue; |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
692 } |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
693 goto out; |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
694 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
695 buf_incrwritepos(buf, len); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
696 } while (len < maxlen && len > 0); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
697 |
|
357
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
698 ret = DROPBEAR_SUCCESS; |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
699 |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
700 out: |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
701 if (fd >= 0) { |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
702 m_close(fd); |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
703 } |
|
9e2ad1023978
Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents:
335
diff
changeset
|
704 return ret; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
705 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
706 |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
707 /* get a line from the file into buffer in the style expected for an |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
708 * authkeys file. |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
709 * Will return DROPBEAR_SUCCESS if data is read, or DROPBEAR_FAILURE on EOF.*/ |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
710 /* Only used for ~/.ssh/known_hosts and ~/.ssh/authorized_keys */ |
|
68
eee77ac31ccc
cleaning up the pubkey defines
Matt Johnston <matt@ucc.asn.au>
parents:
64
diff
changeset
|
711 #if defined(DROPBEAR_CLIENT) || defined(ENABLE_SVR_PUBKEY_AUTH) |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
712 int buf_getline(buffer * line, FILE * authfile) { |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
713 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
714 int c = EOF; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
715 |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
161
diff
changeset
|
716 TRACE(("enter buf_getline")) |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
717 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
718 buf_setpos(line, 0); |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
719 buf_setlen(line, 0); |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
720 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
721 while (line->pos < line->size) { |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
722 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
723 c = fgetc(authfile); /*getc() is weird with some uClibc systems*/ |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
724 if (c == EOF || c == '\n' || c == '\r') { |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
725 goto out; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
726 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
727 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
728 buf_putbyte(line, (unsigned char)c); |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
729 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
730 |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
161
diff
changeset
|
731 TRACE(("leave getauthline: line too long")) |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
732 /* We return success, but the line length will be zeroed - ie we just |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
733 * ignore that line */ |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
734 buf_setlen(line, 0); |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
735 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
736 out: |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
737 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
738 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
739 /* if we didn't read anything before EOF or error, exit */ |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
740 if (c == EOF && line->pos == 0) { |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
161
diff
changeset
|
741 TRACE(("leave buf_getline: failure")) |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
742 return DROPBEAR_FAILURE; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
743 } else { |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
161
diff
changeset
|
744 TRACE(("leave buf_getline: success")) |
|
117
e0acad552a92
Read the last line of a file without a finishing '\n' correctly
Matt Johnston <matt@ucc.asn.au>
parents:
109
diff
changeset
|
745 buf_setpos(line, 0); |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
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45
diff
changeset
|
746 return DROPBEAR_SUCCESS; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
747 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
748 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
749 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
750 #endif |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
751 |
|
277
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
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|
752 /* make sure that the socket closes */ |
|
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
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258
diff
changeset
|
753 void m_close(int fd) { |
|
4
fe6bca95afa7
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parents:
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changeset
|
754 |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
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changeset
|
755 int val; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
756 do { |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
757 val = close(fd); |
|
fe6bca95afa7
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parents:
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|
758 } while (val < 0 && errno == EINTR); |
|
fe6bca95afa7
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|
759 |
|
277
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
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258
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|
760 if (val < 0 && errno != EBADF) { |
|
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
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diff
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|
761 /* Linux says EIO can happen */ |
|
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
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258
diff
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|
762 dropbear_exit("Error closing fd %d, %s", fd, strerror(errno)); |
|
4
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changeset
|
763 } |
|
fe6bca95afa7
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changeset
|
764 } |
|
fe6bca95afa7
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parents:
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changeset
|
765 |
|
fe6bca95afa7
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parents:
diff
changeset
|
766 void * m_malloc(size_t size) { |
|
fe6bca95afa7
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parents:
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changeset
|
767 |
|
fe6bca95afa7
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parents:
diff
changeset
|
768 void* ret; |
|
fe6bca95afa7
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parents:
diff
changeset
|
769 |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
770 if (size == 0) { |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
771 dropbear_exit("m_malloc failed"); |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
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changeset
|
772 } |
|
123
a0db9a23f6d4
calloc memory rather than mallocing it - can't hurt too much, and is
Matt Johnston <matt@ucc.asn.au>
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117
diff
changeset
|
773 ret = calloc(1, size); |
|
4
fe6bca95afa7
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parents:
diff
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|
774 if (ret == NULL) { |
|
fe6bca95afa7
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parents:
diff
changeset
|
775 dropbear_exit("m_malloc failed"); |
|
fe6bca95afa7
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changeset
|
776 } |
|
fe6bca95afa7
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changeset
|
777 return ret; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
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|
778 |
|
fe6bca95afa7
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changeset
|
779 } |
|
fe6bca95afa7
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parents:
diff
changeset
|
780 |
|
11
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
781 void * m_strdup(const char * str) { |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
782 char* ret; |
|
f76c9389e9e0
Mostly done with the listener changeover
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parents:
4
diff
changeset
|
783 |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
784 ret = strdup(str); |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
785 if (ret == NULL) { |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
786 dropbear_exit("m_strdup failed"); |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
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|
787 } |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
788 return ret; |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
789 } |
|
f76c9389e9e0
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parents:
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diff
changeset
|
790 |
|
4
fe6bca95afa7
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|
791 void __m_free(void* ptr) { |
|
fe6bca95afa7
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|
792 if (ptr != NULL) { |
|
fe6bca95afa7
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changeset
|
793 free(ptr); |
|
fe6bca95afa7
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changeset
|
794 } |
|
fe6bca95afa7
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|
795 } |
|
fe6bca95afa7
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|
796 |
|
fe6bca95afa7
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|
797 void * m_realloc(void* ptr, size_t size) { |
|
fe6bca95afa7
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changeset
|
798 |
|
fe6bca95afa7
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changeset
|
799 void *ret; |
|
fe6bca95afa7
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changeset
|
800 |
|
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changeset
|
801 if (size == 0) { |
|
fe6bca95afa7
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changeset
|
802 dropbear_exit("m_realloc failed"); |
|
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changeset
|
803 } |
|
fe6bca95afa7
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changeset
|
804 ret = realloc(ptr, size); |
|
fe6bca95afa7
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changeset
|
805 if (ret == NULL) { |
|
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parents:
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changeset
|
806 dropbear_exit("m_realloc failed"); |
|
fe6bca95afa7
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parents:
diff
changeset
|
807 } |
|
fe6bca95afa7
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changeset
|
808 return ret; |
|
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diff
changeset
|
809 } |
|
fe6bca95afa7
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parents:
diff
changeset
|
810 |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
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changeset
|
811 /* Clear the data, based on the method in David Wheeler's |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
812 * "Secure Programming for Linux and Unix HOWTO" */ |
| 161 | 813 /* Beware of calling this from within dbutil.c - things might get |
| 814 * optimised away */ | |
|
4
fe6bca95afa7
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changeset
|
815 void m_burn(void *data, unsigned int len) { |
|
fe6bca95afa7
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parents:
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changeset
|
816 volatile char *p = data; |
|
fe6bca95afa7
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changeset
|
817 |
|
fe6bca95afa7
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changeset
|
818 if (data == NULL) |
|
fe6bca95afa7
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changeset
|
819 return; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
820 while (len--) { |
|
fe6bca95afa7
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parents:
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changeset
|
821 *p++ = 0x66; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
822 } |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
823 } |
| 26 | 824 |
|
109
2e9d1f29c50f
merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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108
diff
changeset
|
825 |
|
2e9d1f29c50f
merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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108
diff
changeset
|
826 void setnonblocking(int fd) { |
|
2e9d1f29c50f
merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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108
diff
changeset
|
827 |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
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161
diff
changeset
|
828 TRACE(("setnonblocking: %d", fd)) |
|
109
2e9d1f29c50f
merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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diff
changeset
|
829 |
|
2e9d1f29c50f
merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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108
diff
changeset
|
830 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) { |
|
173
257f09a63dab
* add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents:
172
diff
changeset
|
831 if (errno == ENODEV) { |
|
257f09a63dab
* add SSH_ASKPASS support (based on patch from Paul Whittaker
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172
diff
changeset
|
832 /* Some devices (like /dev/null redirected in) |
|
257f09a63dab
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172
diff
changeset
|
833 * can't be set to non-blocking */ |
|
257f09a63dab
* add SSH_ASKPASS support (based on patch from Paul Whittaker
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172
diff
changeset
|
834 TRACE(("ignoring ENODEV for setnonblocking")) |
|
257f09a63dab
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diff
changeset
|
835 } else { |
|
257f09a63dab
* add SSH_ASKPASS support (based on patch from Paul Whittaker
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172
diff
changeset
|
836 dropbear_exit("Couldn't set nonblocking"); |
|
257f09a63dab
* add SSH_ASKPASS support (based on patch from Paul Whittaker
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172
diff
changeset
|
837 } |
|
109
2e9d1f29c50f
merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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diff
changeset
|
838 } |
|
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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161
diff
changeset
|
839 TRACE(("leave setnonblocking")) |
|
109
2e9d1f29c50f
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changeset
|
840 } |
| 425 | 841 |
| 842 void disallow_core() { | |
| 843 struct rlimit lim; | |
| 844 lim.rlim_cur = lim.rlim_max = 0; | |
| 845 setrlimit(RLIMIT_CORE, &lim); | |
| 846 } | |
|
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
847 |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
848 /* Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE, with the result in *val */ |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
849 int m_str_to_uint(const char* str, unsigned int *val) { |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
850 errno = 0; |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
851 *val = strtoul(str, NULL, 10); |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
852 /* The c99 spec doesn't actually seem to define EINVAL, but most platforms |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
853 * I've looked at mention it in their manpage */ |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
854 if ((*val == 0 && errno == EINVAL) |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
855 || (*val == ULONG_MAX && errno == ERANGE)) { |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
856 return DROPBEAR_FAILURE; |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
857 } else { |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
858 return DROPBEAR_SUCCESS; |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
490
diff
changeset
|
859 } |
|
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
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490
diff
changeset
|
860 } |