annotate dbutil.c @ 1309:3b624ad2dc5e

make sure socket is of the right domain
author Matt Johnston <matt@ucc.asn.au>
date Sun, 19 Jun 2016 20:38:38 +0800
parents 3017bc7d6238
children 750ec4ec4cbe efad433418c4
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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 #ifdef 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 exit(exitcode);
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124 }
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125
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126 void fail_assert(const char* expr, const char* file, int line) {
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127 dropbear_exit("Failed assertion (%s:%d): `%s'", file, line, expr);
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128 }
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129
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130 static void generic_dropbear_log(int UNUSED(priority), const char* format,
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131 va_list param) {
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132
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133 char printbuf[1024];
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134
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135 vsnprintf(printbuf, sizeof(printbuf), format, param);
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136
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137 fprintf(stderr, "%s\n", printbuf);
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138
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139 }
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140
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141 /* this is what can be called to write arbitrary log messages */
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142 void dropbear_log(int priority, const char* format, ...) {
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143
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144 va_list param;
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145
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146 va_start(param, format);
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147 _dropbear_log(priority, format, param);
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148 va_end(param);
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149 }
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150
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151
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diff changeset
152 #ifdef DEBUG_TRACE
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153
1021
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154 static double debug_start_time = -1;
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diff changeset
155
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diff changeset
156 void debug_start_net()
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diff changeset
157 {
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diff changeset
158 if (getenv("DROPBEAR_DEBUG_NET_TIMESTAMP"))
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159 {
1250
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160 /* Timestamps start from first network activity */
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diff changeset
161 struct timeval tv;
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parents: 1211
diff changeset
162 gettimeofday(&tv, NULL);
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163 debug_start_time = tv.tv_sec + (tv.tv_usec / 1000000.0);
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diff changeset
164 TRACE(("Resetting Dropbear TRACE timestamps"))
1021
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165 }
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parents: 1018
diff changeset
166 }
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match
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167
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168 static double time_since_start()
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diff changeset
169 {
1250
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diff changeset
170 double nowf;
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diff changeset
171 struct timeval tv;
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parents: 1211
diff changeset
172 gettimeofday(&tv, NULL);
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173 nowf = tv.tv_sec + (tv.tv_usec / 1000000.0);
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174 if (debug_start_time < 0)
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parents: 1211
diff changeset
175 {
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parents: 1211
diff changeset
176 debug_start_time = nowf;
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diff changeset
177 return 0;
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parents: 1211
diff changeset
178 }
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parents: 1211
diff changeset
179 return nowf - debug_start_time;
1016
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180 }
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181
4
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182 void dropbear_trace(const char* format, ...) {
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183 va_list param;
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184
94
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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parents: 73
diff changeset
185 if (!debug_trace) {
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parents: 73
diff changeset
186 return;
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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parents: 73
diff changeset
187 }
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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parents: 73
diff changeset
188
4
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189 va_start(param, format);
1016
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parents: 995
diff changeset
190 fprintf(stderr, "TRACE (%d) %f: ", getpid(), time_since_start());
4
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191 vfprintf(stderr, format, param);
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192 fprintf(stderr, "\n");
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193 va_end(param);
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194 }
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
195
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
196 void dropbear_trace2(const char* format, ...) {
753
d63ef1e211ea Take transmit and receive keys into use separately
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parents: 731
diff changeset
197 static int trace_env = -1;
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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diff changeset
198 va_list param;
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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diff changeset
199
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
200 if (trace_env == -1) {
d63ef1e211ea Take transmit and receive keys into use separately
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parents: 731
diff changeset
201 trace_env = getenv("DROPBEAR_TRACE2") ? 1 : 0;
d63ef1e211ea Take transmit and receive keys into use separately
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diff changeset
202 }
d63ef1e211ea Take transmit and receive keys into use separately
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parents: 731
diff changeset
203
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
204 if (!(debug_trace && trace_env)) {
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
205 return;
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
206 }
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
207
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
208 va_start(param, format);
1016
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Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
209 fprintf(stderr, "TRACE2 (%d) %f: ", getpid(), time_since_start());
731
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
210 vfprintf(stderr, format, param);
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
211 fprintf(stderr, "\n");
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
212 va_end(param);
9a5438271556 Move the more verbose TRACE() statements into TRACE2()
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parents: 667
diff changeset
213 }
4
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parents:
diff changeset
214 #endif /* DEBUG_TRACE */
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215
547
cf376c696dfc Make it compile, update for changes in channel structure.
Matt Johnston <matt@ucc.asn.au>
parents: 500
diff changeset
216 /* Connect to a given unix socket. The socket is blocking */
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
217 #ifdef ENABLE_CONNECT_UNIX
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
218 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
219 struct sockaddr_un addr;
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
220 int fd = -1;
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parents: 198
diff changeset
221
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
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diff changeset
222 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
223 addr.sun_family = AF_UNIX;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
224 strlcpy(addr.sun_path, path, sizeof(addr.sun_path));
225
ca7e76d981d9 - progress towards client agent forwarding
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parents: 198
diff changeset
225 fd = socket(PF_UNIX, SOCK_STREAM, 0);
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
226 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
227 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
228 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
229 }
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
230 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
231 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
232 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
233 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
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parents: 547
diff changeset
234 }
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
235 return fd;
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
236 }
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
237 #endif
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
238
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
239 /* 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
240 * 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
241 * 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
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parents: 482
diff changeset
242 * If ret_errfd == NULL then stderr will not be captured.
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
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parents: 482
diff changeset
243 * ret_pid can be passed as NULL to discard the pid. */
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
244 int spawn_command(void(*exec_fn)(void *user_data), 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
245 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
246 int infds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
247 int outfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
248 int errfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
249 pid_t pid;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
250
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
251 const int FDIN = 0;
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
252 const int FDOUT = 1;
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
253
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
254 /* 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
255 if (pipe(infds) != 0) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
256 return DROPBEAR_FAILURE;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
257 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
258 if (pipe(outfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
259 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
260 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
261 if (ret_errfd && pipe(errfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
262 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
263 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
264
667
fc7ae88e63b3 Rename HAVE_FORK to USE_VFORK
Matt Johnston <matt@ucc.asn.au>
parents: 666
diff changeset
265 #ifdef USE_VFORK
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
266 pid = vfork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
267 #else
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
268 pid = fork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
269 #endif
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
270
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
271 if (pid < 0) {
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
272 return DROPBEAR_FAILURE;
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
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parents: 482
diff changeset
273 }
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
274
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
275 if (!pid) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
276 /* child */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
277
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
278 TRACE(("back to normal sigchld"))
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
279 /* Revert to normal sigchld handling */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
280 if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
281 dropbear_exit("signal() error");
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
282 }
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
283
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
284 /* redirect stdin/stdout */
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
285
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
286 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) ||
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
287 (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
288 (ret_errfd && dup2(errfds[FDOUT], STDERR_FILENO) < 0)) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
289 TRACE(("leave noptycommand: error redirecting FDs"))
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
290 dropbear_exit("Child dup2() failure");
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
291 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
292
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parents: 433
diff changeset
293 close(infds[FDOUT]);
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parents: 433
diff changeset
294 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
295 close(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
296 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
297 if (ret_errfd)
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
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parents: 482
diff changeset
298 {
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diff changeset
299 close(errfds[FDIN]);
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diff changeset
300 close(errfds[FDOUT]);
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parents: 482
diff changeset
301 }
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
302
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
303 exec_fn(exec_data);
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parents: 433
diff changeset
304 /* not reached */
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
305 return DROPBEAR_FAILURE;
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parents: 433
diff changeset
306 } else {
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
307 /* parent */
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parents: 433
diff changeset
308 close(infds[FDIN]);
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parents: 433
diff changeset
309 close(outfds[FDOUT]);
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diff changeset
310
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parents: 433
diff changeset
311 setnonblocking(outfds[FDIN]);
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parents: 433
diff changeset
312 setnonblocking(infds[FDOUT]);
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diff changeset
313
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
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parents: 482
diff changeset
314 if (ret_errfd) {
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diff changeset
315 close(errfds[FDOUT]);
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diff changeset
316 setnonblocking(errfds[FDIN]);
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parents: 482
diff changeset
317 }
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parents: 482
diff changeset
318
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
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parents: 482
diff changeset
319 if (ret_pid) {
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parents: 482
diff changeset
320 *ret_pid = pid;
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parents: 482
diff changeset
321 }
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parents: 482
diff changeset
322
481
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
323 *ret_writefd = infds[FDOUT];
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parents: 433
diff changeset
324 *ret_readfd = outfds[FDIN];
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
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parents: 482
diff changeset
325 if (ret_errfd) {
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parents: 482
diff changeset
326 *ret_errfd = errfds[FDIN];
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parents: 482
diff changeset
327 }
481
357a2e2e9bcc - Generalise spawn_command function
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diff changeset
328 return DROPBEAR_SUCCESS;
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
329 }
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
330 }
357a2e2e9bcc - Generalise spawn_command function
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parents: 433
diff changeset
331
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
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parents: 481
diff changeset
332 /* 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
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parents: 481
diff changeset
333 * 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
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parents: 481
diff changeset
334 */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
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parents: 481
diff changeset
335 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
336 char * argv[4];
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
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parents: 481
diff changeset
337 char * baseshell = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
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parents: 481
diff changeset
338 unsigned int i;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
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parents: 481
diff changeset
339
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
340 baseshell = basename(usershell);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
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parents: 481
diff changeset
341
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
342 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
343 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
344 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
345 /* 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
346 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
347 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
348 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
349 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
350
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
351 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
352 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
353 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
354 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
355 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
356 /* 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
357 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
358 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
359
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
360 /* 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
361 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
362 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
363 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
364
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
365 /* 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
366 * 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
367 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
368 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
369 }
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 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
372 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
373
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
374 #ifdef DEBUG_TRACE
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
375 void printhex(const char * label, const unsigned char * buf, int len) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
376
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
377 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
378
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
379 fprintf(stderr, "%s\n", label);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
380 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381 fprintf(stderr, "%02x", buf[i]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 if (i % 16 == 15) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385 else if (i % 2 == 1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 fprintf(stderr, " ");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
388 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
389 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
390 }
764
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
391
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
392 void printmpint(const char *label, mp_int *mp) {
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
393 buffer *buf = buf_new(1000);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
394 buf_putmpint(buf, mp);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
395 printhex(label, buf->data, buf->len);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
396 buf_free(buf);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
397
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
398 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
399 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
400
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
401 /* 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
402 * for '\n', '\r' and '\t'.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
403 * 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
404 * use */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
405 char * stripcontrol(const char * text) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407 char * ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
408 int len, pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
409 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
410
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
411 len = strlen(text);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
412 ret = m_malloc(len+1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
414 pos = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
415 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
416 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
417 || 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
418 ret[pos] = text[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419 pos++;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
420 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
421 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
422 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
423 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
424 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
425
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
426
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
427 /* 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
428 * 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
429 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
431
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
432 int fd = -1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 int maxlen;
358
e81d3bc1dc78 Forgot variable declaration.
Matt Johnston <matt@ucc.asn.au>
parents: 357
diff changeset
435 int ret = DROPBEAR_FAILURE;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437 fd = open(filename, O_RDONLY);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439 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
440 goto out;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
443 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444 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
445 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
446 if (len < 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
447 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
448 continue;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
449 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
450 goto out;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
451 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
452 buf_incrwritepos(buf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453 } while (len < maxlen && len > 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
455 ret = DROPBEAR_SUCCESS;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
456
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
457 out:
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
458 if (fd >= 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
459 m_close(fd);
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
460 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
461 return ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
462 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
464 /* 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
465 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
466 * 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
467 /* Only used for ~/.ssh/known_hosts and ~/.ssh/authorized_keys */
68
eee77ac31ccc cleaning up the pubkey defines
Matt Johnston <matt@ucc.asn.au>
parents: 64
diff changeset
468 #if defined(DROPBEAR_CLIENT) || defined(ENABLE_SVR_PUBKEY_AUTH)
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
469 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
470
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
471 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
472
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
473 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
474 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
475
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
476 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
477
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
478 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
479 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
480 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
481 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
482
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
483 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
484 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
485
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
486 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
487 /* 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
488 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
489 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
490
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
491 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
492
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
493
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
494 /* 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
495 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
496 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
497 } 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
498 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
499 return DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
500 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
501
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
502 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
503 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
504
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
505 /* make sure that the socket closes */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
506 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
507 int val;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508
883
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
509 if (fd == -1) {
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
510 return;
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
511 }
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
512
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
513 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514 val = close(fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
517 if (val < 0 && errno != EBADF) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
518 /* Linux says EIO can happen */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
519 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
520 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523 void * m_malloc(size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
525 void* ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
527 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529 }
123
a0db9a23f6d4 calloc memory rather than mallocing it - can't hurt too much, and is
Matt Johnston <matt@ucc.asn.au>
parents: 117
diff changeset
530 ret = calloc(1, size);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
533 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
534 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537
11
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
538 void * m_strdup(const char * str) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
539 char* ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
540
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
541 ret = strdup(str);
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
542 if (ret == NULL) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
543 dropbear_exit("m_strdup failed");
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
544 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
545 return ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
546 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
547
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
548 void * m_realloc(void* ptr, size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
549
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 void *ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
551
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
554 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
555 ret = realloc(ptr, size);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
560 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
562 void setnonblocking(int fd) {
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
563
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
564 TRACE(("setnonblocking: %d", fd))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
565
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
566 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
567 if (errno == ENODEV) {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
568 /* 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
569 * 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
570 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
571 } else {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
572 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
573 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
574 }
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
575 TRACE(("leave setnonblocking"))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
576 }
425
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
577
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
578 void disallow_core() {
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
579 struct rlimit lim;
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
580 lim.rlim_cur = lim.rlim_max = 0;
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
581 setrlimit(RLIMIT_CORE, &lim);
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
582 }
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
583
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
584 /* 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
585 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
586 unsigned long l;
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
587 errno = 0;
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
588 l = strtoul(str, NULL, 10);
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
589 /* 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
590 * I've looked at mention it in their manpage */
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
591 if ((l == 0 && errno == EINVAL)
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
592 || (l == ULONG_MAX && errno == ERANGE)
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
593 || (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
594 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
595 } else {
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
596 *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
597 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
598 }
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
599 }
817
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
600
1134
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
601 /* Returns malloced path. inpath beginning with '/' is returned as-is,
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
602 otherwise home directory is prepended */
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
603 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
604 struct passwd *pw = NULL;
1134
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
605 if (inpath[0] != '/') {
995
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
606 pw = getpwuid(getuid());
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
607 if (pw && pw->pw_dir) {
1134
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
608 int len = strlen(inpath) + strlen(pw->pw_dir) + 2;
995
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
609 char *buf = m_malloc(len);
1134
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
610 snprintf(buf, len, "%s/%s", pw->pw_dir, inpath);
995
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
611 return buf;
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
612 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
613 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
614
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
615 /* Fallback */
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
616 return m_strdup(inpath);
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
617 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
618
817
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
619 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
620 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
621 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
622 uint8_t c = 0;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
623 size_t i;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
624 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
625 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
626 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
627 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
628 return c;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
629 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
630
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
631 #if defined(__linux__) && defined(SYS_clock_gettime)
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
632 /* CLOCK_MONOTONIC_COARSE was added in Linux 2.6.32 but took a while to
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
633 reach userspace include headers */
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
634 #ifndef CLOCK_MONOTONIC_COARSE
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
635 #define CLOCK_MONOTONIC_COARSE 6
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
636 #endif
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
637 static clockid_t get_linux_clock_source() {
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
638 struct timespec ts;
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
639 if (syscall(SYS_clock_gettime, CLOCK_MONOTONIC_COARSE, &ts) == 0) {
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
640 return CLOCK_MONOTONIC_COARSE;
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
641 }
953
356a25a108a3 Fix some format string warnings
Matt Johnston <matt@ucc.asn.au>
parents: 952
diff changeset
642
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
643 if (syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &ts) == 0) {
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
644 return CLOCK_MONOTONIC;
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
645 }
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
646 return -1;
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
647 }
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
648 #endif
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
649
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
650 time_t monotonic_now() {
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
651 #if defined(__linux__) && defined(SYS_clock_gettime)
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
652 static clockid_t clock_source = -2;
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
653
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
654 if (clock_source == -2) {
953
356a25a108a3 Fix some format string warnings
Matt Johnston <matt@ucc.asn.au>
parents: 952
diff changeset
655 /* First run, find out which one works.
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
656 -1 will fall back to time() */
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
657 clock_source = get_linux_clock_source();
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
658 }
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
659
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
660 if (clock_source >= 0) {
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
661 struct timespec ts;
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
662 if (syscall(SYS_clock_gettime, clock_source, &ts) != 0) {
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
663 /* Intermittent clock failures should not happen */
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
664 dropbear_exit("Clock broke");
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
665 }
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
666 return ts.tv_sec;
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
667 }
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
668 #endif /* linux clock_gettime */
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
669
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
670 #if defined(HAVE_MACH_ABSOLUTE_TIME)
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
671 /* OS X, 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
672 static mach_timebase_info_data_t timebase_info;
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
673 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
674 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
675 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
676 return mach_absolute_time() * timebase_info.numer / timebase_info.denom
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
677 / 1e9;
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
678 #endif /* osx mach_absolute_time */
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
679
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
680 /* Fallback for everything else - this will sometimes go backwards */
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
681 return time(NULL);
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
682 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
683
1024
aac0095dc3b4 work in progress for async connect
Matt Johnston <matt@ucc.asn.au>
parents: 1023
diff changeset
684