Mercurial > dropbear
annotate dbutil.c @ 277:044bc108b9b3
* Per-IP connection unauthed connection limits
* m_close() exits fatally on failure
* other cleanups
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 08 Mar 2006 12:41:27 +0000 |
| parents | 306499676384 |
| children | 79bf1023cf11 973fccb59ea4 e17f0333c21e 28b10e93685c |
| 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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108
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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: "); |
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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)); |
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289 TRACE(("leave dropbear_listen: failure, %s", strerror(err))) |
| 62 | 290 return -1; |
| 291 } | |
| 292 } | |
| 293 | |
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294 TRACE(("leave dropbear_listen: success, %d socks bound", nsock)) |
| 62 | 295 return nsock; |
| 296 } | |
| 297 | |
| 26 | 298 /* Connect via TCP to a host. Connection will try ipv4 or ipv6, will |
| 62 | 299 * return immediately if nonblocking is set. On failure, if errstring |
| 300 * wasn't null, it will be a newly malloced error message */ | |
| 301 | |
| 302 /* TODO: maxfd */ | |
| 26 | 303 int connect_remote(const char* remotehost, const char* remoteport, |
| 304 int nonblocking, char ** errstring) { | |
| 305 | |
| 306 struct addrinfo *res0 = NULL, *res = NULL, hints; | |
| 307 int sock; | |
| 308 int err; | |
| 309 | |
|
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310 TRACE(("enter connect_remote")) |
| 26 | 311 |
| 312 if (errstring != NULL) { | |
| 313 *errstring = NULL; | |
| 314 } | |
| 315 | |
| 316 memset(&hints, 0, sizeof(hints)); | |
| 317 hints.ai_socktype = SOCK_STREAM; | |
| 318 hints.ai_family = PF_UNSPEC; | |
| 319 | |
| 320 err = getaddrinfo(remotehost, remoteport, &hints, &res0); | |
| 321 if (err) { | |
| 322 if (errstring != NULL && *errstring == NULL) { | |
| 323 int len; | |
| 324 len = 20 + strlen(gai_strerror(err)); | |
| 325 *errstring = (char*)m_malloc(len); | |
| 326 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err)); | |
| 327 } | |
|
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328 TRACE(("Error resolving: %s", gai_strerror(err))) |
| 26 | 329 return -1; |
| 330 } | |
| 331 | |
| 332 sock = -1; | |
| 333 err = EADDRNOTAVAIL; | |
| 334 for (res = res0; res; res = res->ai_next) { | |
| 335 | |
| 336 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); | |
| 337 if (sock < 0) { | |
| 338 err = errno; | |
| 339 continue; | |
| 340 } | |
| 341 | |
| 342 if (nonblocking) { | |
| 343 if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) { | |
| 344 close(sock); | |
| 345 sock = -1; | |
| 346 if (errstring != NULL && *errstring == NULL) { | |
| 347 *errstring = m_strdup("Failed non-blocking"); | |
| 348 } | |
|
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349 TRACE(("Failed non-blocking: %s", strerror(errno))) |
| 26 | 350 continue; |
| 351 } | |
| 352 } | |
| 353 | |
| 354 if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) { | |
|
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355 if (errno == EINPROGRESS && nonblocking) { |
|
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356 TRACE(("Connect in progress")) |
| 26 | 357 break; |
| 358 } else { | |
| 359 err = errno; | |
| 360 close(sock); | |
| 361 sock = -1; | |
| 362 continue; | |
| 363 } | |
| 364 } | |
| 365 | |
| 366 break; /* Success */ | |
| 367 } | |
| 368 | |
|
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369 if (sock < 0 && !(errno == EINPROGRESS && nonblocking)) { |
| 26 | 370 /* Failed */ |
| 371 if (errstring != NULL && *errstring == NULL) { | |
| 372 int len; | |
| 373 len = 20 + strlen(strerror(err)); | |
| 374 *errstring = (char*)m_malloc(len); | |
| 375 snprintf(*errstring, len, "Error connecting: %s", strerror(err)); | |
| 376 } | |
|
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377 TRACE(("Error connecting: %s", strerror(err))) |
| 26 | 378 } else { |
| 379 /* Success */ | |
|
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380 set_sock_priority(sock); |
| 26 | 381 } |
| 382 | |
| 383 freeaddrinfo(res0); | |
| 62 | 384 if (sock > 0 && errstring != NULL && *errstring != NULL) { |
| 385 m_free(*errstring); | |
| 386 } | |
| 26 | 387 |
|
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388 TRACE(("leave connect_remote: sock %d\n", sock)) |
| 26 | 389 return sock; |
| 390 } | |
| 391 | |
|
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392 /* Return a string representation of the socket address passed. The return |
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393 * value is allocated with malloc() */ |
| 62 | 394 unsigned char * getaddrstring(struct sockaddr_storage* addr, int withport) { |
|
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395 |
| 62 | 396 char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV]; |
| 397 char *retstring = NULL; | |
| 398 int ret; | |
| 399 unsigned int len; | |
|
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400 |
| 62 | 401 len = sizeof(struct sockaddr_storage); |
|
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402 /* Some platforms such as Solaris 8 require that len is the length |
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403 * of the specific structure. */ |
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404 if (addr->ss_family == AF_INET) { |
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405 len = sizeof(struct sockaddr_in); |
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406 } |
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407 #ifdef AF_INET6 |
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408 if (addr->ss_family == AF_INET6) { |
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409 len = sizeof(struct sockaddr_in6); |
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410 } |
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411 #endif |
| 62 | 412 |
| 413 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), | |
| 414 sbuf, sizeof(sbuf), NI_NUMERICSERV | NI_NUMERICHOST); | |
|
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415 |
| 62 | 416 if (ret != 0) { |
| 417 /* This is a fairly bad failure - it'll fallback to IP if it | |
| 418 * just can't resolve */ | |
| 419 dropbear_exit("failed lookup (%d, %d)", ret, errno); | |
| 420 } | |
|
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421 |
| 62 | 422 if (withport) { |
| 423 len = strlen(hbuf) + 2 + strlen(sbuf); | |
| 424 retstring = (char*)m_malloc(len); | |
| 425 snprintf(retstring, len, "%s:%s", hbuf, sbuf); | |
| 426 } else { | |
| 427 retstring = m_strdup(hbuf); | |
| 428 } | |
|
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429 |
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430 return retstring; |
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431 |
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432 } |
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433 |
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434 /* Get the hostname corresponding to the address addr. On failure, the IP |
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435 * address is returned. The return value is allocated with strdup() */ |
| 62 | 436 char* getaddrhostname(struct sockaddr_storage * addr) { |
|
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437 |
| 62 | 438 char hbuf[NI_MAXHOST]; |
| 439 char sbuf[NI_MAXSERV]; | |
| 440 int ret; | |
| 441 unsigned int len; | |
|
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442 #ifdef DO_HOST_LOOKUP |
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443 const int flags = NI_NUMERICSERV; |
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444 #else |
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445 const int flags = NI_NUMERICHOST | NI_NUMERICSERV; |
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446 #endif |
| 62 | 447 |
| 448 len = sizeof(struct sockaddr_storage); | |
|
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449 /* Some platforms such as Solaris 8 require that len is the length |
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450 * of the specific structure. */ |
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451 if (addr->ss_family == AF_INET) { |
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452 len = sizeof(struct sockaddr_in); |
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453 } |
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454 #ifdef AF_INET6 |
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455 if (addr->ss_family == AF_INET6) { |
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456 len = sizeof(struct sockaddr_in6); |
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457 } |
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458 #endif |
|
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459 |
|
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460 |
| 62 | 461 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), |
|
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462 sbuf, sizeof(sbuf), flags); |
| 62 | 463 |
| 464 if (ret != 0) { | |
| 465 /* On some systems (Darwin does it) we get EINTR from getnameinfo | |
| 466 * somehow. Eew. So we'll just return the IP, since that doesn't seem | |
| 467 * to exhibit that behaviour. */ | |
| 468 return getaddrstring(addr, 0); | |
|
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469 } |
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470 |
| 62 | 471 return m_strdup(hbuf); |
|
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472 } |
| 62 | 473 |
|
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474 #ifdef DEBUG_TRACE |
|
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475 void printhex(const char * label, const unsigned char * buf, int len) { |
|
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476 |
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477 int i; |
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478 |
|
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479 fprintf(stderr, "%s\n", label); |
|
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480 for (i = 0; i < len; i++) { |
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481 fprintf(stderr, "%02x", buf[i]); |
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482 if (i % 16 == 15) { |
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483 fprintf(stderr, "\n"); |
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484 } |
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485 else if (i % 2 == 1) { |
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486 fprintf(stderr, " "); |
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487 } |
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488 } |
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489 fprintf(stderr, "\n"); |
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490 } |
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491 #endif |
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492 |
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493 /* Strip all control characters from text (a null-terminated string), except |
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494 * for '\n', '\r' and '\t'. |
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495 * The result returned is a newly allocated string, this must be free()d after |
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496 * use */ |
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497 char * stripcontrol(const char * text) { |
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498 |
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499 char * ret; |
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500 int len, pos; |
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501 int i; |
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502 |
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503 len = strlen(text); |
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504 ret = m_malloc(len+1); |
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505 |
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506 pos = 0; |
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507 for (i = 0; i < len; i++) { |
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508 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */ |
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509 || text[i] == '\n' || text[i] == '\r' || text[i] == '\t') { |
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510 ret[pos] = text[i]; |
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511 pos++; |
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512 } |
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513 } |
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514 ret[pos] = 0x0; |
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515 return ret; |
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516 } |
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517 |
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518 |
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519 /* reads the contents of filename into the buffer buf, from the current |
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520 * position, either to the end of the file, or the buffer being full. |
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521 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ |
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522 int buf_readfile(buffer* buf, const char* filename) { |
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523 |
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changeset
|
524 int fd; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
525 int len; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
526 int maxlen; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
527 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
528 fd = open(filename, O_RDONLY); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
529 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
530 if (fd < 0) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
531 close(fd); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
532 return DROPBEAR_FAILURE; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
533 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
534 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
535 do { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
536 maxlen = buf->size - buf->pos; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
537 len = read(fd, buf_getwriteptr(buf, maxlen), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
538 maxlen); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
539 buf_incrwritepos(buf, len); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
540 } while (len < maxlen && len > 0); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
541 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
542 close(fd); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
543 return DROPBEAR_SUCCESS; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
544 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
545 |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
546 /* 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
|
547 * authkeys file. |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
548 * 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
|
549 /* 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
|
550 #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
|
551 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
|
552 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
553 int c = EOF; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
554 |
|
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
|
555 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
|
556 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
557 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
|
558 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
|
559 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
560 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
|
561 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
562 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
|
563 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
|
564 goto out; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
565 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
566 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
567 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
|
568 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
569 |
|
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
|
570 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
|
571 /* 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
|
572 * ignore that line */ |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
573 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
|
574 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
575 out: |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
576 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
577 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
578 /* 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
|
579 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
|
580 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
|
581 return DROPBEAR_FAILURE; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
582 } 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
|
583 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
|
584 buf_setpos(line, 0); |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
585 return DROPBEAR_SUCCESS; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
586 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
587 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
588 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
589 #endif |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
590 |
|
277
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
591 /* make sure that the socket closes */ |
|
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
592 void m_close(int fd) { |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
593 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
594 int val; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
595 do { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
596 val = close(fd); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
597 } while (val < 0 && errno == EINTR); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
598 |
|
277
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
599 if (val < 0 && errno != EBADF) { |
|
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
600 /* Linux says EIO can happen */ |
|
044bc108b9b3
* Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
601 dropbear_exit("Error closing fd %d, %s", fd, strerror(errno)); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
602 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
603 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
604 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
605 void * m_malloc(size_t size) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
606 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
607 void* ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
608 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
609 if (size == 0) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
610 dropbear_exit("m_malloc failed"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
611 } |
|
123
a0db9a23f6d4
calloc memory rather than mallocing it - can't hurt too much, and is
Matt Johnston <matt@ucc.asn.au>
parents:
117
diff
changeset
|
612 ret = calloc(1, size); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
613 if (ret == NULL) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
614 dropbear_exit("m_malloc failed"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
615 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
616 return ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
617 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
618 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
619 |
|
11
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
620 void * m_strdup(const char * str) { |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
621 char* ret; |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
622 |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
623 ret = strdup(str); |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
624 if (ret == NULL) { |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
625 dropbear_exit("m_strdup failed"); |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
626 } |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
627 return ret; |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
628 } |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
629 |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
630 void __m_free(void* ptr) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
631 if (ptr != NULL) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
632 free(ptr); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
633 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
634 } |
|
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 void * m_realloc(void* ptr, size_t size) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
637 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
638 void *ret; |
|
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 if (size == 0) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
641 dropbear_exit("m_realloc failed"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
642 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
643 ret = realloc(ptr, size); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
644 if (ret == NULL) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
645 dropbear_exit("m_realloc failed"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
646 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
647 return ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
648 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
649 |
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650 /* Clear the data, based on the method in David Wheeler's |
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651 * "Secure Programming for Linux and Unix HOWTO" */ |
| 161 | 652 /* Beware of calling this from within dbutil.c - things might get |
| 653 * optimised away */ | |
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654 void m_burn(void *data, unsigned int len) { |
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655 volatile char *p = data; |
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656 |
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657 if (data == NULL) |
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658 return; |
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659 while (len--) { |
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660 *p++ = 0x66; |
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661 } |
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662 } |
| 26 | 663 |
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664 |
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665 void setnonblocking(int fd) { |
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666 |
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667 TRACE(("setnonblocking: %d", fd)) |
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668 |
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669 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) { |
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670 if (errno == ENODEV) { |
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671 /* Some devices (like /dev/null redirected in) |
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672 * can't be set to non-blocking */ |
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673 TRACE(("ignoring ENODEV for setnonblocking")) |
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674 } else { |
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675 dropbear_exit("Couldn't set nonblocking"); |
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676 } |
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677 } |
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678 TRACE(("leave setnonblocking")) |
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679 } |