annotate dbutil.c @ 85:2877c5a02d7c

#ifdef for PENDIN
author Matt Johnston <matt@ucc.asn.au>
date Tue, 17 Aug 2004 10:29:04 +0000
parents 0bf5cebe622c
children c85c88500ea6
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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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69 int usingsyslog = 0; /* set by runopts, but required externally to sessions */
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70 #ifndef DISABLE_SYSLOG
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71 void startsyslog() {
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72
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73 openlog(PROGNAME, LOG_PID, LOG_AUTHPRIV);
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74
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75 }
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76 #endif /* DISABLE_SYSLOG */
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77
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78 /* the "format" string must be <= 100 characters */
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79 void dropbear_close(const char* format, ...) {
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80
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81 va_list param;
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82
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83 va_start(param, format);
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84 _dropbear_exit(EXIT_SUCCESS, format, param);
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85 va_end(param);
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86
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87 }
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88
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89 void dropbear_exit(const char* format, ...) {
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90
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91 va_list param;
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92
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93 va_start(param, format);
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94 _dropbear_exit(EXIT_FAILURE, format, param);
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95 va_end(param);
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96 }
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97
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98 static void generic_dropbear_exit(int exitcode, const char* format,
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99 va_list param) {
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100
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101 char fmtbuf[300];
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102
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103 snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", format);
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104
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105 _dropbear_log(LOG_INFO, fmtbuf, param);
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106
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107 exit(exitcode);
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108 }
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109
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110 static void generic_dropbear_log(int priority, const char* format,
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111 va_list param) {
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112
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113 char printbuf[1024];
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114
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115 vsnprintf(printbuf, sizeof(printbuf), format, param);
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116
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117 fprintf(stderr, "%s\n", printbuf);
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118
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119 }
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120
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121 /* this is what can be called to write arbitrary log messages */
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122 void dropbear_log(int priority, const char* format, ...) {
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123
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124 va_list param;
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125
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126 va_start(param, format);
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127 _dropbear_log(priority, format, param);
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128 va_end(param);
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129 }
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130
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131
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132 #ifdef DEBUG_TRACE
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133 void dropbear_trace(const char* format, ...) {
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134
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135 va_list param;
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136
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137 va_start(param, format);
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138 fprintf(stderr, "TRACE: ");
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139 vfprintf(stderr, format, param);
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140 fprintf(stderr, "\n");
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141 va_end(param);
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142 }
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143 #endif /* DEBUG_TRACE */
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144
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145 /* Listen on address:port. Unless address is NULL, in which case listen on
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146 * everything. If called with address == "", we'll listen on localhost/loopback.
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147 * Returns the number of sockets bound on success, or -1 on failure. On
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148 * failure, if errstring wasn't NULL, it'll be a newly malloced error
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149 * string.*/
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150 int dropbear_listen(const char* address, const char* port,
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151 int *socks, unsigned int sockcount, char **errstring, int *maxfd) {
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152
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b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
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diff changeset
153 struct addrinfo hints, *res = NULL, *res0 = NULL;
62
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154 int err;
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diff changeset
155 unsigned int nsock;
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diff changeset
156 struct linger linger;
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157 int val;
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158 int sock;
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159
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160 TRACE(("enter dropbear_listen"));
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161
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162 memset(&hints, 0, sizeof(hints));
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diff changeset
163 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */
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diff changeset
164 hints.ai_socktype = SOCK_STREAM;
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
165
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
166 if (address && address[0] == '\0') {
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
167 TRACE(("dropbear_listen: local loopback"));
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
168 address = NULL;
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
169 } else {
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
170 TRACE(("dropbear_listen: not local loopback"));
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
171 hints.ai_flags = AI_PASSIVE;
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
172 }
62
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173 err = getaddrinfo(address, port, &hints, &res0);
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174
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175 if (err) {
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diff changeset
176 if (errstring != NULL && *errstring == NULL) {
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diff changeset
177 int len;
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178 len = 20 + strlen(gai_strerror(err));
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179 *errstring = (char*)m_malloc(len);
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180 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
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diff changeset
181 }
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182 TRACE(("leave dropbear_listen: failed resolving"));
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183 return -1;
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184 }
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185
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186
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187 nsock = 0;
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188 for (res = res0; res != NULL && nsock < sockcount;
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189 res = res->ai_next) {
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190
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191 /* Get a socket */
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192 socks[nsock] = socket(res->ai_family, res->ai_socktype,
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193 res->ai_protocol);
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194
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195 sock = socks[nsock]; /* For clarity */
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196
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197 if (sock < 0) {
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198 err = errno;
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199 TRACE(("socket() failed"));
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200 continue;
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201 }
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202
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diff changeset
203 /* Various useful socket options */
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204 val = 1;
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diff changeset
205 /* set to reuse, quick timeout */
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diff changeset
206 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val));
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207 linger.l_onoff = 1;
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diff changeset
208 linger.l_linger = 5;
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diff changeset
209 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger));
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210
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diff changeset
211 /* disable nagle */
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diff changeset
212 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val));
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213
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diff changeset
214 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
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diff changeset
215 err = errno;
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diff changeset
216 close(sock);
64
efb5e0b335cf TCP forwarding works.
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diff changeset
217 TRACE(("bind(%s) failed", port));
62
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diff changeset
218 continue;
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diff changeset
219 }
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220
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diff changeset
221 if (listen(sock, 20) < 0) {
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diff changeset
222 err = errno;
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diff changeset
223 close(sock);
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diff changeset
224 TRACE(("listen() failed"));
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diff changeset
225 continue;
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diff changeset
226 }
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diff changeset
227
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diff changeset
228 *maxfd = MAX(*maxfd, sock);
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229
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230 nsock++;
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diff changeset
231 }
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232
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diff changeset
233 if (nsock == 0) {
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diff changeset
234 if (errstring != NULL && *errstring == NULL) {
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diff changeset
235 int len;
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diff changeset
236 len = 20 + strlen(strerror(err));
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diff changeset
237 *errstring = (char*)m_malloc(len);
64
efb5e0b335cf TCP forwarding works.
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diff changeset
238 snprintf(*errstring, len, "Error listening: %s", strerror(err));
62
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diff changeset
239 TRACE(("leave dropbear_listen: failure, %s", strerror(err)));
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diff changeset
240 return -1;
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diff changeset
241 }
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diff changeset
242 }
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diff changeset
243
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diff changeset
244 TRACE(("leave dropbear_listen: success, %d socks bound", nsock));
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diff changeset
245 return nsock;
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diff changeset
246 }
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diff changeset
247
26
0969767bca0d snapshot of stuff
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diff changeset
248 /* Connect via TCP to a host. Connection will try ipv4 or ipv6, will
62
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diff changeset
249 * return immediately if nonblocking is set. On failure, if errstring
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diff changeset
250 * wasn't null, it will be a newly malloced error message */
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diff changeset
251
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diff changeset
252 /* TODO: maxfd */
26
0969767bca0d snapshot of stuff
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diff changeset
253 int connect_remote(const char* remotehost, const char* remoteport,
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diff changeset
254 int nonblocking, char ** errstring) {
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diff changeset
255
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diff changeset
256 struct addrinfo *res0 = NULL, *res = NULL, hints;
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diff changeset
257 int sock;
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diff changeset
258 int err;
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diff changeset
259
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diff changeset
260 TRACE(("enter connect_remote"));
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diff changeset
261
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diff changeset
262 if (errstring != NULL) {
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diff changeset
263 *errstring = NULL;
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diff changeset
264 }
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diff changeset
265
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diff changeset
266 memset(&hints, 0, sizeof(hints));
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diff changeset
267 hints.ai_socktype = SOCK_STREAM;
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diff changeset
268 hints.ai_family = PF_UNSPEC;
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diff changeset
269
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diff changeset
270 err = getaddrinfo(remotehost, remoteport, &hints, &res0);
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diff changeset
271 if (err) {
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diff changeset
272 if (errstring != NULL && *errstring == NULL) {
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diff changeset
273 int len;
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diff changeset
274 len = 20 + strlen(gai_strerror(err));
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diff changeset
275 *errstring = (char*)m_malloc(len);
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diff changeset
276 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
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parents: 11
diff changeset
277 }
0969767bca0d snapshot of stuff
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diff changeset
278 TRACE(("Error resolving: %s", gai_strerror(err)));
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diff changeset
279 return -1;
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diff changeset
280 }
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diff changeset
281
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parents: 11
diff changeset
282 sock = -1;
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parents: 11
diff changeset
283 err = EADDRNOTAVAIL;
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
284 for (res = res0; res; res = res->ai_next) {
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diff changeset
285
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diff changeset
286 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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parents: 11
diff changeset
287 if (sock < 0) {
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diff changeset
288 err = errno;
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diff changeset
289 continue;
0969767bca0d snapshot of stuff
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diff changeset
290 }
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parents: 11
diff changeset
291
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parents: 11
diff changeset
292 if (nonblocking) {
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parents: 11
diff changeset
293 if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
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parents: 11
diff changeset
294 close(sock);
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parents: 11
diff changeset
295 sock = -1;
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
296 if (errstring != NULL && *errstring == NULL) {
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
297 *errstring = m_strdup("Failed non-blocking");
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parents: 11
diff changeset
298 }
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
299 TRACE(("Failed non-blocking: %s", strerror(errno)));
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parents: 11
diff changeset
300 continue;
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
301 }
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
302 }
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parents: 11
diff changeset
303
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diff changeset
304 if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) {
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
305 if (errno == EINPROGRESS && nonblocking) {
26
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
306 TRACE(("Connect in progress"));
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
307 break;
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
308 } else {
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
309 err = errno;
0969767bca0d snapshot of stuff
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diff changeset
310 close(sock);
0969767bca0d snapshot of stuff
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diff changeset
311 sock = -1;
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
312 continue;
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
313 }
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
314 }
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
315
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
316 break; /* Success */
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
317 }
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
318
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
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parents: 68
diff changeset
319 if (sock < 0 && !(errno == EINPROGRESS && nonblocking)) {
26
0969767bca0d snapshot of stuff
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diff changeset
320 /* Failed */
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diff changeset
321 if (errstring != NULL && *errstring == NULL) {
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diff changeset
322 int len;
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diff changeset
323 len = 20 + strlen(strerror(err));
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diff changeset
324 *errstring = (char*)m_malloc(len);
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diff changeset
325 snprintf(*errstring, len, "Error connecting: %s", strerror(err));
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diff changeset
326 }
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diff changeset
327 TRACE(("Error connecting: %s", strerror(err)));
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diff changeset
328 } else {
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diff changeset
329 /* Success */
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diff changeset
330 /* (err is used as a dummy var here) */
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diff changeset
331 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&err, sizeof(err));
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diff changeset
332 }
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diff changeset
333
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diff changeset
334 freeaddrinfo(res0);
62
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diff changeset
335 if (sock > 0 && errstring != NULL && *errstring != NULL) {
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diff changeset
336 m_free(*errstring);
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diff changeset
337 }
26
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diff changeset
338
62
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diff changeset
339 TRACE(("leave connect_remote: sock %d\n", sock));
26
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diff changeset
340 return sock;
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diff changeset
341 }
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diff changeset
342
4
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343 /* Return a string representation of the socket address passed. The return
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344 * value is allocated with malloc() */
62
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diff changeset
345 unsigned char * getaddrstring(struct sockaddr_storage* addr, int withport) {
4
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346
62
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diff changeset
347 char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
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diff changeset
348 char *retstring = NULL;
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diff changeset
349 int ret;
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diff changeset
350 unsigned int len;
4
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351
62
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diff changeset
352 len = sizeof(struct sockaddr_storage);
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diff changeset
353
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diff changeset
354 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf),
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diff changeset
355 sbuf, sizeof(sbuf), NI_NUMERICSERV | NI_NUMERICHOST);
4
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356
62
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diff changeset
357 if (ret != 0) {
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parents: 51
diff changeset
358 /* This is a fairly bad failure - it'll fallback to IP if it
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parents: 51
diff changeset
359 * just can't resolve */
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parents: 51
diff changeset
360 dropbear_exit("failed lookup (%d, %d)", ret, errno);
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parents: 51
diff changeset
361 }
4
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parents:
diff changeset
362
62
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parents: 51
diff changeset
363 if (withport) {
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parents: 51
diff changeset
364 len = strlen(hbuf) + 2 + strlen(sbuf);
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parents: 51
diff changeset
365 retstring = (char*)m_malloc(len);
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parents: 51
diff changeset
366 snprintf(retstring, len, "%s:%s", hbuf, sbuf);
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parents: 51
diff changeset
367 } else {
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parents: 51
diff changeset
368 retstring = m_strdup(hbuf);
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parents: 51
diff changeset
369 }
4
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parents:
diff changeset
370
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parents:
diff changeset
371 return retstring;
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parents:
diff changeset
372
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parents:
diff changeset
373 }
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parents:
diff changeset
374
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parents:
diff changeset
375 /* Get the hostname corresponding to the address addr. On failure, the IP
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
376 * address is returned. The return value is allocated with strdup() */
62
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diff changeset
377 char* getaddrhostname(struct sockaddr_storage * addr) {
4
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parents:
diff changeset
378
62
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diff changeset
379 char hbuf[NI_MAXHOST];
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parents: 51
diff changeset
380 char sbuf[NI_MAXSERV];
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parents: 51
diff changeset
381 int ret;
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parents: 51
diff changeset
382 unsigned int len;
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parents: 51
diff changeset
383
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parents: 51
diff changeset
384 len = sizeof(struct sockaddr_storage);
4
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parents:
diff changeset
385
62
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parents: 51
diff changeset
386 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf),
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parents: 51
diff changeset
387 sbuf, sizeof(sbuf), NI_NUMERICSERV);
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parents: 51
diff changeset
388
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parents: 51
diff changeset
389 if (ret != 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
390 /* On some systems (Darwin does it) we get EINTR from getnameinfo
20563735e8b5 just checkpointing
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parents: 51
diff changeset
391 * somehow. Eew. So we'll just return the IP, since that doesn't seem
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parents: 51
diff changeset
392 * to exhibit that behaviour. */
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parents: 51
diff changeset
393 return getaddrstring(addr, 0);
4
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parents:
diff changeset
394 }
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
395
62
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parents: 51
diff changeset
396 return m_strdup(hbuf);
4
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diff changeset
397 }
62
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parents: 51
diff changeset
398
4
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diff changeset
399 #ifdef DEBUG_TRACE
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parents:
diff changeset
400 void printhex(unsigned char* buf, int len) {
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
401
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parents:
diff changeset
402 int i;
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parents:
diff changeset
403
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
404 for (i = 0; i < len; i++) {
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parents:
diff changeset
405 fprintf(stderr, "%02x", buf[i]);
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parents:
diff changeset
406 if (i % 16 == 15) {
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parents:
diff changeset
407 fprintf(stderr, "\n");
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
408 }
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
409 else if (i % 2 == 1) {
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parents:
diff changeset
410 fprintf(stderr, " ");
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parents:
diff changeset
411 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
412 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413 fprintf(stderr, "\n");
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parents:
diff changeset
414 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
415 #endif
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parents:
diff changeset
416
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
417 /* 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
418 * for '\n', '\r' and '\t'.
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419 * 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
420 * use */
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parents:
diff changeset
421 char * stripcontrol(const char * text) {
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parents:
diff changeset
422
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
423 char * ret;
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parents:
diff changeset
424 int len, pos;
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parents:
diff changeset
425 int i;
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parents:
diff changeset
426
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
427 len = strlen(text);
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parents:
diff changeset
428 ret = m_malloc(len+1);
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parents:
diff changeset
429
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 pos = 0;
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parents:
diff changeset
431 for (i = 0; i < len; i++) {
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parents:
diff changeset
432 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
433 || text[i] == '\n' || text[i] == '\r' || text[i] == '\t') {
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parents:
diff changeset
434 ret[pos] = text[i];
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parents:
diff changeset
435 pos++;
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
436 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437 }
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
438 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
443 /* reads the contents of filename into the buffer buf, from the current
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
444 * 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
445 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
446 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
448 int fd;
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
449 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
450 int maxlen;
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parents:
diff changeset
451
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
452 fd = open(filename, O_RDONLY);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 if (fd < 0) {
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parents:
diff changeset
455 close(fd);
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parents:
diff changeset
456 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
457 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
458
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 do {
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
460 maxlen = buf->size - buf->pos;
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
461 len = read(fd, buf_getwriteptr(buf, maxlen),
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
462 maxlen);
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
463 buf_incrwritepos(buf, len);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
464 } while (len < maxlen && len > 0);
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parents:
diff changeset
465
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
466 close(fd);
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
467 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
468 }
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
469
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
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parents: 45
diff changeset
470 /* 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
471 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
472 * 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
473 /* 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
474 #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
475 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
476
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
477 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
478
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
479 TRACE(("enter buf_getline"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
480
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
481 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
482 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
483
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
484 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
485
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
486 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
487 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
488 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
489 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
490
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
491 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
492 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
493
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
494 TRACE(("leave getauthline: line too long"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
495 /* 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
496 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
497 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
498
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
499 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
500
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
501 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
502
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
503 /* 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
504 if (c == EOF && line->pos == 0) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
505 TRACE(("leave getauthline: failure"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
506 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
507 } else {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
508 TRACE(("leave getauthline: success"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
509 return DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
510 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
511
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
512 TRACE(("leave buf_getline"));
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
513 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
514 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
515
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516 /* loop until the socket is closed (in case of EINTR) or
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
517 * we get and error.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
518 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
519 int m_close(int fd) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
520
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521 int val;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523 val = close(fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
525
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526 if (val == 0 || errno == EBADF) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
527 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
533 void * m_malloc(size_t size) {
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 void* ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540 ret = malloc(size);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
544 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
545
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
546 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547
11
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
548 void * m_strdup(const char * str) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
549 char* ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
550
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
551 ret = strdup(str);
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
552 if (ret == NULL) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
553 dropbear_exit("m_strdup failed");
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
554 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
555 return ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
556 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
557
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558 void __m_free(void* ptr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559 if (ptr != NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
560 free(ptr);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
564 void * m_realloc(void* ptr, size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
565
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566 void *ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
569 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
570 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
571 ret = realloc(ptr, size);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
574 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
576 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 /* Clear the data, based on the method in David Wheeler's
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
579 * "Secure Programming for Linux and Unix HOWTO" */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
580 void m_burn(void *data, unsigned int len) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
581 volatile char *p = data;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
582
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
583 if (data == NULL)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
584 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585 while (len--) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
586 *p++ = 0x66;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
587 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
588 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
589