annotate dbutil.c @ 1925:7ac3b6c380b1

Fix C99 comment
author Matt Johnston <matt@ucc.asn.au>
date Wed, 30 Mar 2022 14:28:59 +0800
parents 667937351c31
children 83b6a47759a8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 "config.h"
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52
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53 #ifdef __linux__
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54 #define _GNU_SOURCE
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55 /* To call clock_gettime() directly */
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56 #include <sys/syscall.h>
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57 #endif /* __linux */
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58
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59 #ifdef HAVE_MACH_MACH_TIME_H
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60 #include <mach/mach_time.h>
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61 #include <mach/mach.h>
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62 #endif
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63
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64 #include "includes.h"
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65 #include "dbutil.h"
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66 #include "buffer.h"
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67 #include "session.h"
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68 #include "atomicio.h"
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69
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70 #define MAX_FMT 100
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71
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72 static void generic_dropbear_exit(int exitcode, const char* format,
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73 va_list param) ATTRIB_NORETURN;
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74 static void generic_dropbear_log(int priority, const char* format,
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75 va_list param);
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76
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77 void (*_dropbear_exit)(int exitcode, const char* format, va_list param) ATTRIB_NORETURN
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78 = generic_dropbear_exit;
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79 void (*_dropbear_log)(int priority, const char* format, va_list param)
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80 = generic_dropbear_log;
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81
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82 #if DEBUG_TRACE
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83 int debug_trace = 0;
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84 #endif
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85
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86 #ifndef DISABLE_SYSLOG
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87 void startsyslog(const char *ident) {
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88
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89 openlog(ident, LOG_PID, LOG_AUTHPRIV);
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90
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91 }
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92 #endif /* DISABLE_SYSLOG */
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93
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94 /* the "format" string must be <= 100 characters */
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95 void dropbear_close(const char* format, ...) {
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96
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97 va_list param;
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98
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99 va_start(param, format);
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100 _dropbear_exit(EXIT_SUCCESS, format, param);
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101 va_end(param);
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102
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103 }
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104
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105 void dropbear_exit(const char* format, ...) {
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106
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107 va_list param;
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108
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109 va_start(param, format);
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110 _dropbear_exit(EXIT_FAILURE, format, param);
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111 va_end(param);
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112 }
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113
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114 static void generic_dropbear_exit(int exitcode, const char* format,
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115 va_list param) {
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116
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117 char fmtbuf[300];
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118
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119 snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", format);
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120
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121 _dropbear_log(LOG_INFO, fmtbuf, param);
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122
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123 #if DROPBEAR_FUZZ
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124 if (fuzz.do_jmp) {
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125 longjmp(fuzz.jmp, 1);
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126 }
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127 #endif
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128
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129 exit(exitcode);
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130 }
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131
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132 void fail_assert(const char* expr, const char* file, int line) {
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133 dropbear_exit("Failed assertion (%s:%d): `%s'", file, line, expr);
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134 }
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135
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136 static void generic_dropbear_log(int UNUSED(priority), const char* format,
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137 va_list param) {
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138
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139 char printbuf[1024];
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140
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141 vsnprintf(printbuf, sizeof(printbuf), format, param);
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142
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143 fprintf(stderr, "%s\n", printbuf);
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144
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145 }
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146
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147 /* this is what can be called to write arbitrary log messages */
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148 void dropbear_log(int priority, const char* format, ...) {
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149
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150 va_list param;
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151
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152 va_start(param, format);
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153 _dropbear_log(priority, format, param);
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154 va_end(param);
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155 }
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156
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157
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158 #if DEBUG_TRACE
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159
1021
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160 static double debug_start_time = -1;
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161
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162 void debug_start_net()
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163 {
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164 if (getenv("DROPBEAR_DEBUG_NET_TIMESTAMP"))
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165 {
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166 /* Timestamps start from first network activity */
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167 struct timeval tv;
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168 gettimeofday(&tv, NULL);
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169 debug_start_time = tv.tv_sec + (tv.tv_usec / 1000000.0);
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170 TRACE(("Resetting Dropbear TRACE timestamps"))
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171 }
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172 }
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173
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174 static double time_since_start()
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175 {
1250
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176 double nowf;
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177 struct timeval tv;
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178 gettimeofday(&tv, NULL);
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179 nowf = tv.tv_sec + (tv.tv_usec / 1000000.0);
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180 if (debug_start_time < 0)
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181 {
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182 debug_start_time = nowf;
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183 return 0;
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184 }
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185 return nowf - debug_start_time;
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186 }
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187
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188 static void dropbear_tracelevel(int level, const char *format, va_list param)
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189 {
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diff changeset
190 if (debug_trace == 0 || debug_trace < level) {
94
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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191 return;
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192 }
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193
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194 fprintf(stderr, "TRACE%d (%d) %f: ", level, getpid(), time_since_start());
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195 vfprintf(stderr, format, param);
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196 fprintf(stderr, "\n");
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197 }
1898
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198 #if (DEBUG_TRACE>=1)
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199 void dropbear_trace1(const char* format, ...) {
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200 va_list param;
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201
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diff changeset
202 va_start(param, format);
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diff changeset
203 dropbear_tracelevel(1, format, param);
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diff changeset
204 va_end(param);
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diff changeset
205 }
1898
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diff changeset
206 #endif
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diff changeset
207 #if (DEBUG_TRACE>=2)
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diff changeset
208 void dropbear_trace2(const char* format, ...) {
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diff changeset
209 va_list param;
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diff changeset
210
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diff changeset
211 va_start(param, format);
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diff changeset
212 dropbear_tracelevel(2, format, param);
4
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213 va_end(param);
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parents:
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214 }
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diff changeset
215 #endif
1898
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diff changeset
216 #if (DEBUG_TRACE>=3)
1893
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diff changeset
217 void dropbear_trace3(const char* format, ...) {
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diff changeset
218 va_list param;
753
d63ef1e211ea Take transmit and receive keys into use separately
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diff changeset
219
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diff changeset
220 va_start(param, format);
1898
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diff changeset
221 dropbear_tracelevel(3, format, param);
1893
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diff changeset
222 va_end(param);
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223 }
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diff changeset
224 #endif
1898
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diff changeset
225 #if (DEBUG_TRACE>=4)
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diff changeset
226 void dropbear_trace4(const char* format, ...) {
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diff changeset
227 va_list param;
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228
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diff changeset
229 va_start(param, format);
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diff changeset
230 dropbear_tracelevel(4, format, param);
1893
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diff changeset
231 va_end(param);
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diff changeset
232 }
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parents: 1851
diff changeset
233 #endif
1898
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parents: 1893
diff changeset
234 #if (DEBUG_TRACE>=5)
1893
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parents: 1851
diff changeset
235 void dropbear_trace5(const char* format, ...) {
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
236 va_list param;
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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diff changeset
237
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
238 va_start(param, format);
1898
3f87f7ff1092 Fix building with DEBUG_TRACE = 0
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parents: 1893
diff changeset
239 dropbear_tracelevel(5, format, param);
731
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parents: 667
diff changeset
240 va_end(param);
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
241 }
1893
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diff changeset
242 #endif
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diff changeset
243 #endif
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diff changeset
244
4
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parents:
diff changeset
245
547
cf376c696dfc Make it compile, update for changes in channel structure.
Matt Johnston <matt@ucc.asn.au>
parents: 500
diff changeset
246 /* Connect to a given unix socket. The socket is blocking */
1499
2d450c1056e3 options: Complete the transition to numeric toggles (`#if')
Michael Witten <mfwitten@gmail.com>
parents: 1468
diff changeset
247 #if ENABLE_CONNECT_UNIX
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
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parents: 547
diff changeset
248 int connect_unix(const char* path) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
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parents: 547
diff changeset
249 struct sockaddr_un addr;
225
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parents: 198
diff changeset
250 int fd = -1;
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parents: 198
diff changeset
251
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
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parents: 547
diff changeset
252 memset((void*)&addr, 0x0, sizeof(addr));
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
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parents: 547
diff changeset
253 addr.sun_family = AF_UNIX;
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parents: 547
diff changeset
254 strlcpy(addr.sun_path, path, sizeof(addr.sun_path));
225
ca7e76d981d9 - progress towards client agent forwarding
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parents: 198
diff changeset
255 fd = socket(PF_UNIX, SOCK_STREAM, 0);
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
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parents: 547
diff changeset
256 if (fd < 0) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
257 TRACE(("Failed to open unix socket"))
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
258 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
259 }
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
260 if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
261 TRACE(("Failed to connect to '%s' socket", path))
615
e3ac0a426bd0 Fix FD leak if connect() fails, found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents: 614
diff changeset
262 m_close(fd);
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
263 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
264 }
225
ca7e76d981d9 - progress towards client agent forwarding
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parents: 198
diff changeset
265 return fd;
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
266 }
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
267 #endif
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
268
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
269 /* Sets up a pipe for a, returning three non-blocking file descriptors
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
270 * and the pid. exec_fn is the function that will actually execute the child process,
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
271 * it will be run after the child has fork()ed, and is passed exec_data.
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
272 * If ret_errfd == NULL then stderr will not be captured.
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
273 * ret_pid can be passed as NULL to discard the pid. */
1460
58a74cb829b8 Pointer parameter could be declared as pointing to const (callback)
Francois Perrad <francois.perrad@gadz.org>
parents: 1343
diff changeset
274 int spawn_command(void(*exec_fn)(const void *user_data), const void *exec_data,
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
275 int *ret_writefd, int *ret_readfd, int *ret_errfd, pid_t *ret_pid) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
276 int infds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
277 int outfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
278 int errfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
279 pid_t pid;
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
280
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parents: 433
diff changeset
281 const int FDIN = 0;
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parents: 433
diff changeset
282 const int FDOUT = 1;
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
283
1740
dfbe947bdf0d Make wrapfd share a common buffer for all FDs
Matt Johnston <matt@ucc.asn.au>
parents: 1622
diff changeset
284 #if DROPBEAR_FUZZ
dfbe947bdf0d Make wrapfd share a common buffer for all FDs
Matt Johnston <matt@ucc.asn.au>
parents: 1622
diff changeset
285 if (fuzz.fuzzing) {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs
Matt Johnston <matt@ucc.asn.au>
parents: 1622
diff changeset
286 return fuzz_spawn_command(ret_writefd, ret_readfd, ret_errfd, ret_pid);
dfbe947bdf0d Make wrapfd share a common buffer for all FDs
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parents: 1622
diff changeset
287 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs
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parents: 1622
diff changeset
288 #endif
dfbe947bdf0d Make wrapfd share a common buffer for all FDs
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parents: 1622
diff changeset
289
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
290 /* redirect stdin/stdout/stderr */
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
291 if (pipe(infds) != 0) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
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parents: 482
diff changeset
292 return DROPBEAR_FAILURE;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
293 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
294 if (pipe(outfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
295 return DROPBEAR_FAILURE;
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
296 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
297 if (ret_errfd && pipe(errfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
298 return DROPBEAR_FAILURE;
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
299 }
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
300
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1283
diff changeset
301 #if DROPBEAR_VFORK
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
302 pid = vfork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
303 #else
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
304 pid = fork();
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
305 #endif
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
306
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
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parents: 482
diff changeset
307 if (pid < 0) {
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
308 return DROPBEAR_FAILURE;
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
309 }
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
310
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
311 if (!pid) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
312 /* child */
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
313
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
314 TRACE(("back to normal sigchld"))
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
315 /* Revert to normal sigchld handling */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
316 if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
317 dropbear_exit("signal() error");
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
318 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
319
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
320 /* redirect stdin/stdout */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
321
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
322 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) ||
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
323 (dup2(outfds[FDOUT], STDOUT_FILENO) < 0) ||
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
324 (ret_errfd && dup2(errfds[FDOUT], STDERR_FILENO) < 0)) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
325 TRACE(("leave noptycommand: error redirecting FDs"))
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
326 dropbear_exit("Child dup2() failure");
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
327 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
328
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
329 close(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
330 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
331 close(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
332 close(outfds[FDOUT]);
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
333 if (ret_errfd)
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
334 {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
335 close(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
336 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
337 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
338
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
339 exec_fn(exec_data);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
340 /* not reached */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
341 return DROPBEAR_FAILURE;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
342 } else {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
343 /* parent */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
344 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
345 close(outfds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
346
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
347 setnonblocking(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
348 setnonblocking(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
349
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
350 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
351 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
352 setnonblocking(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
353 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
354
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
355 if (ret_pid) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
356 *ret_pid = pid;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
357 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
358
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
359 *ret_writefd = infds[FDOUT];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
360 *ret_readfd = outfds[FDIN];
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
361 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
362 *ret_errfd = errfds[FDIN];
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
363 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
364 return DROPBEAR_SUCCESS;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
365 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
366 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
367
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
368 /* Runs a command with "sh -c". Will close FDs (except stdin/stdout/stderr) and
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
369 * re-enabled SIGPIPE. If cmd is NULL, will run a login shell.
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
370 */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
371 void run_shell_command(const char* cmd, unsigned int maxfd, char* usershell) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
372 char * argv[4];
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
373 char * baseshell = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
374 unsigned int i;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
375
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
376 baseshell = basename(usershell);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
377
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
378 if (cmd != NULL) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
379 argv[0] = baseshell;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
380 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
381 /* a login shell should be "-bash" for "/bin/bash" etc */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
382 int len = strlen(baseshell) + 2; /* 2 for "-" */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
383 argv[0] = (char*)m_malloc(len);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
384 snprintf(argv[0], len, "-%s", baseshell);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
385 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
386
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
387 if (cmd != NULL) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
388 argv[1] = "-c";
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
389 argv[2] = (char*)cmd;
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
390 argv[3] = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
391 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
392 /* construct a shell of the form "-bash" etc */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
393 argv[1] = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
394 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
395
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
396 /* Re-enable SIGPIPE for the executed process */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
397 if (signal(SIGPIPE, SIG_DFL) == SIG_ERR) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
398 dropbear_exit("signal() error");
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
399 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
400
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
401 /* close file descriptors except stdin/stdout/stderr
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
402 * Need to be sure FDs are closed here to avoid reading files as root */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
403 for (i = 3; i <= maxfd; i++) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
404 m_close(i);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
405 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
406
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
407 execv(usershell, argv);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
408 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
409
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1283
diff changeset
410 #if DEBUG_TRACE
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
411 void printhex(const char * label, const unsigned char * buf, int len) {
1764
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
412 int i, j;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
414 fprintf(stderr, "%s\n", label);
1764
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
415 /* for each 16 byte line */
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
416 for (j = 0; j < len; j += 16) {
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
417 const int linelen = MIN(16, len - j);
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
418
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
419 /* print hex digits */
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
420 for (i = 0; i < 16; i++) {
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
421 if (i < linelen) {
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
422 fprintf(stderr, "%02x", buf[j+i]);
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
423 } else {
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
424 fprintf(stderr, " ");
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
425 }
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
426 // separator between pairs
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
427 if (i % 2 ==1) {
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
428 fprintf(stderr, " ");
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
429 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 }
1764
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
431
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
432 /* print characters */
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
433 fprintf(stderr, " ");
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
434 for (i = 0; i < linelen; i++) {
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
435 char c = buf[j+i];
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
436 if (!isprint(c)) {
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
437 c = '.';
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
438 }
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
439 fputc(c, stderr);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440 }
1764
a339b1c4b9f2 Print ascii in printhex too
Matt Johnston <matt@ucc.asn.au>
parents: 1740
diff changeset
441 fprintf(stderr, "\n");
4
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 }
764
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
444
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
445 void printmpint(const char *label, mp_int *mp) {
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
446 buffer *buf = buf_new(1000);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
447 buf_putmpint(buf, mp);
1432
41dca1e5ea34 fix dss debug printing
Matt Johnston <matt@ucc.asn.au>
parents: 1385
diff changeset
448 fprintf(stderr, "%d bits ", mp_count_bits(mp));
764
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
449 printhex(label, buf->data, buf->len);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
450 buf_free(buf);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
451
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
452 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
455 /* 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
456 * for '\n', '\r' and '\t'.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
457 * 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
458 * use */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 char * stripcontrol(const char * text) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
460
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
461 char * ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
462 int len, pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
464
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
465 len = strlen(text);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466 ret = m_malloc(len+1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
467
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
468 pos = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
469 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
470 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
471 || text[i] == '\n' || text[i] == '\r' || text[i] == '\t') {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
472 ret[pos] = text[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
473 pos++;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
474 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
476 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
477 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
478 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
479
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
480
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
481 /* reads the contents of filename into the buffer buf, from the current
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
482 * 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
483 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
485
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
486 int fd = -1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
488 int maxlen;
358
e81d3bc1dc78 Forgot variable declaration.
Matt Johnston <matt@ucc.asn.au>
parents: 357
diff changeset
489 int ret = DROPBEAR_FAILURE;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
490
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
491 fd = open(filename, O_RDONLY);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493 if (fd < 0) {
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
494 goto out;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498 maxlen = buf->size - buf->pos;
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
499 len = read(fd, buf_getwriteptr(buf, maxlen), maxlen);
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
500 if (len < 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
501 if (errno == EINTR || errno == EAGAIN) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
502 continue;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
503 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
504 goto out;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
505 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 buf_incrwritepos(buf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 } while (len < maxlen && len > 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
509 ret = DROPBEAR_SUCCESS;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
510
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
511 out:
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
512 if (fd >= 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
513 m_close(fd);
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
514 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
515 return ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
517
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
518 /* 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
519 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
520 * 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
521 /* Only used for ~/.ssh/known_hosts and ~/.ssh/authorized_keys */
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1283
diff changeset
522 #if DROPBEAR_CLIENT || DROPBEAR_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
523 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
524
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
525 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
526
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
527 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
528 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
529
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
530 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
531
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
532 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
533 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
534 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
535 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
536
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
537 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
538 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
539
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
540 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
541 /* 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
542 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
543 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
544
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
545 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
546
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
547
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
548 /* 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
549 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
550 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
551 } else {
117
e0acad552a92 Read the last line of a file without a finishing '\n' correctly
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
552 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
553 return DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
554 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
555
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 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
558
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
559 /* make sure that the socket closes */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
560 void m_close(int fd) {
1038
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 1022
diff changeset
561 int val;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562
1453
336cae2238ca test close < 0, from Marco Wenzel
Matt Johnston <matt@ucc.asn.au>
parents: 1343
diff changeset
563 if (fd < 0) {
883
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
564 return;
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
565 }
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
566
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568 val = close(fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
569 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
570
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
571 if (val < 0 && errno != EBADF) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
572 /* Linux says EIO can happen */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
573 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
574 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
576
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
577 void setnonblocking(int fd) {
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
578
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
579 TRACE(("setnonblocking: %d", fd))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
580
1558
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
581 #if DROPBEAR_FUZZ
1383
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1375
diff changeset
582 if (fuzz.fuzzing) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1375
diff changeset
583 return;
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1375
diff changeset
584 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1375
diff changeset
585 #endif
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1375
diff changeset
586
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
587 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
173
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
588 if (errno == ENODEV) {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
589 /* Some devices (like /dev/null redirected in)
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
590 * can't be set to non-blocking */
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
591 TRACE(("ignoring ENODEV for setnonblocking"))
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
592 } else {
1383
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority()
Matt Johnston <matt@ucc.asn.au>
parents: 1375
diff changeset
593 {
173
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
594 dropbear_exit("Couldn't set nonblocking");
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
595 }
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
596 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
597 }
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
598 TRACE(("leave setnonblocking"))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
599 }
425
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
600
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
601 void disallow_core() {
1903
9382271da9ef Only set soft core limit not hard limit
Matt Johnston <matt@ucc.asn.au>
parents: 1898
diff changeset
602 struct rlimit lim = {0};
9382271da9ef Only set soft core limit not hard limit
Matt Johnston <matt@ucc.asn.au>
parents: 1898
diff changeset
603 if (getrlimit(RLIMIT_CORE, &lim) < 0) {
9382271da9ef Only set soft core limit not hard limit
Matt Johnston <matt@ucc.asn.au>
parents: 1898
diff changeset
604 TRACE(("getrlimit(RLIMIT_CORE) failed"));
9382271da9ef Only set soft core limit not hard limit
Matt Johnston <matt@ucc.asn.au>
parents: 1898
diff changeset
605 }
9382271da9ef Only set soft core limit not hard limit
Matt Johnston <matt@ucc.asn.au>
parents: 1898
diff changeset
606 lim.rlim_cur = 0;
9382271da9ef Only set soft core limit not hard limit
Matt Johnston <matt@ucc.asn.au>
parents: 1898
diff changeset
607 if (setrlimit(RLIMIT_CORE, &lim) < 0) {
9382271da9ef Only set soft core limit not hard limit
Matt Johnston <matt@ucc.asn.au>
parents: 1898
diff changeset
608 TRACE(("setrlimit(RLIMIT_CORE) failed"));
9382271da9ef Only set soft core limit not hard limit
Matt Johnston <matt@ucc.asn.au>
parents: 1898
diff changeset
609 }
425
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
610 }
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
611
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
612 /* Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE, with the result in *val */
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
613 int m_str_to_uint(const char* str, unsigned int *val) {
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
614 unsigned long l;
1833
870f6e386a0b Partial strings from strtoul should return error
Matt Johnston <matt@codeconstruct.com.au>
parents: 1764
diff changeset
615 char *endp;
870f6e386a0b Partial strings from strtoul should return error
Matt Johnston <matt@codeconstruct.com.au>
parents: 1764
diff changeset
616
870f6e386a0b Partial strings from strtoul should return error
Matt Johnston <matt@codeconstruct.com.au>
parents: 1764
diff changeset
617 l = strtoul(str, &endp, 10);
870f6e386a0b Partial strings from strtoul should return error
Matt Johnston <matt@codeconstruct.com.au>
parents: 1764
diff changeset
618
870f6e386a0b Partial strings from strtoul should return error
Matt Johnston <matt@codeconstruct.com.au>
parents: 1764
diff changeset
619 if (endp == str || *endp != '\0') {
1925
7ac3b6c380b1 Fix C99 comment
Matt Johnston <matt@ucc.asn.au>
parents: 1924
diff changeset
620 /* parse error */
1833
870f6e386a0b Partial strings from strtoul should return error
Matt Johnston <matt@codeconstruct.com.au>
parents: 1764
diff changeset
621 return DROPBEAR_FAILURE;
870f6e386a0b Partial strings from strtoul should return error
Matt Johnston <matt@codeconstruct.com.au>
parents: 1764
diff changeset
622 }
870f6e386a0b Partial strings from strtoul should return error
Matt Johnston <matt@codeconstruct.com.au>
parents: 1764
diff changeset
623
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
624 /* The c99 spec doesn't actually seem to define EINVAL, but most platforms
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
625 * I've looked at mention it in their manpage */
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
626 if ((l == 0 && errno == EINVAL)
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
627 || (l == ULONG_MAX && errno == ERANGE)
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
628 || (l > UINT_MAX)) {
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
629 return DROPBEAR_FAILURE;
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
630 } else {
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
631 *val = l;
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
632 return DROPBEAR_SUCCESS;
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
633 }
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
634 }
817
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
635
1924
667937351c31 Fix tilde expansion of paths
Matt Johnston <matt@ucc.asn.au>
parents: 1903
diff changeset
636 /* Returns malloced path. inpath beginning with '~/' expanded,
667937351c31 Fix tilde expansion of paths
Matt Johnston <matt@ucc.asn.au>
parents: 1903
diff changeset
637 otherwise returned as-is */
1134
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
638 char * expand_homedir_path(const char *inpath) {
995
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
639 struct passwd *pw = NULL;
1924
667937351c31 Fix tilde expansion of paths
Matt Johnston <matt@ucc.asn.au>
parents: 1903
diff changeset
640 if (strncmp(inpath, "~/", 2) == 0) {
1851
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
641 char *homedir = getenv("HOME");
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
642
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
643 if (!homedir) {
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
644 pw = getpwuid(getuid());
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
645 if (pw) {
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
646 homedir = pw->pw_dir;
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
647 }
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
648 }
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
649
7f549ee3df48 Use HOME before /etc/passwd to find id_dropbear (#137)
Matt Robinson <git@nerdoftheherd.com>
parents: 1835
diff changeset
650 if (homedir) {
1924
667937351c31 Fix tilde expansion of paths
Matt Johnston <matt@ucc.asn.au>
parents: 1903
diff changeset
651 int len = strlen(inpath)-2 + strlen(homedir) + 2;
995
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
652 char *buf = m_malloc(len);
1924
667937351c31 Fix tilde expansion of paths
Matt Johnston <matt@ucc.asn.au>
parents: 1903
diff changeset
653 snprintf(buf, len, "%s/%s", homedir, inpath+2);
995
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
654 return buf;
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
655 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
656 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
657
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
658 /* Fallback */
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
659 return m_strdup(inpath);
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
660 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
661
817
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
662 int constant_time_memcmp(const void* a, const void *b, size_t n)
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
663 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
664 const char *xa = a, *xb = b;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
665 uint8_t c = 0;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
666 size_t i;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
667 for (i = 0; i < n; i++)
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
668 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
669 c |= (xa[i] ^ xb[i]);
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
670 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
671 return c;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
672 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
673
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
674 /* higher-resolution monotonic timestamp, falls back to gettimeofday */
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
675 void gettime_wrapper(struct timespec *now) {
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
676 struct timeval tv;
1558
2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
677 #if DROPBEAR_FUZZ
1375
d8215479a58a fuzzing has a constant time
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
678 if (fuzz.fuzzing) {
d8215479a58a fuzzing has a constant time
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
679 /* time stands still when fuzzing */
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
680 now->tv_sec = 5;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
681 now->tv_nsec = 0;
1375
d8215479a58a fuzzing has a constant time
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
682 }
d8215479a58a fuzzing has a constant time
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
683 #endif
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
684
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
685 #if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
686 /* POSIX monotonic clock. Newer Linux, BSD, MacOSX >10.12 */
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
687 if (clock_gettime(CLOCK_MONOTONIC, now) == 0) {
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
688 return;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
689 }
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
690 #endif
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
691
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
692 #if defined(__linux__) && defined(SYS_clock_gettime)
1375
d8215479a58a fuzzing has a constant time
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
693 {
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
694 /* Old linux toolchain - kernel might support it but not the build headers */
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
695 /* Also glibc <2.17 requires -lrt which we neglect to add */
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
696 static int linux_monotonic_failed = 0;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
697 if (!linux_monotonic_failed) {
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
698 /* CLOCK_MONOTONIC isn't in some headers */
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
699 int clock_source_monotonic = 1;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
700 if (syscall(SYS_clock_gettime, clock_source_monotonic, now) == 0) {
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
701 return;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
702 } else {
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
703 /* Don't try again */
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
704 linux_monotonic_failed = 1;
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
705 }
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
706 }
1375
d8215479a58a fuzzing has a constant time
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
707 }
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
708 #endif /* linux fallback clock_gettime */
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
709
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
710 #if defined(HAVE_MACH_ABSOLUTE_TIME)
1375
d8215479a58a fuzzing has a constant time
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
711 {
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
712 /* OS X pre 10.12, see https://developer.apple.com/library/mac/qa/qa1398/_index.html */
930
8f04e36622c0 Fix monotonic_now() on OS X
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
713 static mach_timebase_info_data_t timebase_info;
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
714 uint64_t scaled_time;
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
715 if (timebase_info.denom == 0) {
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
716 mach_timebase_info(&timebase_info);
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
717 }
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
718 scaled_time = mach_absolute_time() * timebase_info.numer / timebase_info.denom;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
719 now->tv_sec = scaled_time / 1000000000;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
720 now->tv_nsec = scaled_time % 1000000000;
1375
d8215479a58a fuzzing has a constant time
Matt Johnston <matt@ucc.asn.au>
parents: 1369
diff changeset
721 }
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
722 #endif /* osx mach_absolute_time */
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
723
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
724 /* Fallback for everything else - this will sometimes go backwards */
1622
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
725 gettimeofday(&tv, NULL);
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
726 now->tv_sec = tv.tv_sec;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
727 now->tv_nsec = 1000*tv.tv_usec;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
728 }
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
729
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
730 /* second-resolution monotonic timestamp */
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
731 time_t monotonic_now() {
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
732 struct timespec ts;
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
733 gettime_wrapper(&ts);
e11ed628708b - Add adaptive authentication failure delay
Matt Johnston <matt@ucc.asn.au>
parents: 1575
diff changeset
734 return ts.tv_sec;
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
735 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
736
1329
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
737 void fsync_parent_dir(const char* fn) {
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
738 #ifdef HAVE_LIBGEN_H
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
739 char *fn_dir = m_strdup(fn);
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
740 char *dir = dirname(fn_dir);
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
741 int dirfd = open(dir, O_RDONLY);
1024
aac0095dc3b4 work in progress for async connect
Matt Johnston <matt@ucc.asn.au>
parents: 1023
diff changeset
742
1329
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
743 if (dirfd != -1) {
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
744 if (fsync(dirfd) != 0) {
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
745 TRACE(("fsync of directory %s failed: %s", dir, strerror(errno)))
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
746 }
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
747 m_close(dirfd);
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
748 } else {
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
749 TRACE(("error opening directory %s for fsync: %s", dir, strerror(errno)))
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
750 }
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
751
1575
e75dab5bec71 some linting after fuzz merge (#60)
François Perrad <francois.perrad@gadz.org>
parents: 1559
diff changeset
752 m_free(fn_dir);
1329
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
753 #endif
185c14fa504d Use atomic key generation in all cases
Matt Johnston <matt@ucc.asn.au>
parents: 1319
diff changeset
754 }
1835
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
755
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
756 int fd_read_pending(int fd) {
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
757 fd_set fds;
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
758 struct timeval timeout;
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
759
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
760 DROPBEAR_FD_ZERO(&fds);
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
761 FD_SET(fd, &fds);
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
762 while (1) {
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
763 timeout.tv_sec = 0;
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
764 timeout.tv_usec = 0;
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
765 if (select(fd+1, &fds, NULL, NULL, &timeout) < 0) {
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
766 if (errno == EINTR) {
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
767 continue;
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
768 }
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
769 return 0;
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
770 }
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
771 return FD_ISSET(fd, &fds);
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
772 }
90ac15aeac43 Bring back recently removed channel->flushing
Matt Johnston <matt@codeconstruct.com.au>
parents: 1833
diff changeset
773 }