annotate dbutil.c @ 693:f31fce2430e8 sha2

increase MAX_MAC_LEN for sha2
author Matt Johnston <matt@ucc.asn.au>
date Fri, 29 Jun 2012 23:24:39 +0800
parents fc7ae88e63b3
children 9a5438271556 2202e854d187
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 "includes.h"
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52 #include "dbutil.h"
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53 #include "buffer.h"
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54 #include "session.h"
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55 #include "atomicio.h"
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56
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57 #define MAX_FMT 100
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58
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59 static void generic_dropbear_exit(int exitcode, const char* format,
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60 va_list param) ATTRIB_NORETURN;
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61 static void generic_dropbear_log(int priority, const char* format,
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62 va_list param);
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63
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64 void (*_dropbear_exit)(int exitcode, const char* format, va_list param) ATTRIB_NORETURN
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65 = generic_dropbear_exit;
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66 void (*_dropbear_log)(int priority, const char* format, va_list param)
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67 = generic_dropbear_log;
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69 #ifdef DEBUG_TRACE
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70 int debug_trace = 0;
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71 #endif
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72
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73 #ifndef DISABLE_SYSLOG
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74 void startsyslog() {
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75
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76 openlog(PROGNAME, LOG_PID, LOG_AUTHPRIV);
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77
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78 }
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79 #endif /* DISABLE_SYSLOG */
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80
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81 /* the "format" string must be <= 100 characters */
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82 void dropbear_close(const char* format, ...) {
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83
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84 va_list param;
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85
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86 va_start(param, format);
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87 _dropbear_exit(EXIT_SUCCESS, format, param);
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88 va_end(param);
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89
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90 }
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91
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92 void dropbear_exit(const char* format, ...) {
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93
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94 va_list param;
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95
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96 va_start(param, format);
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97 _dropbear_exit(EXIT_FAILURE, format, param);
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98 va_end(param);
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99 }
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100
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101 static void generic_dropbear_exit(int exitcode, const char* format,
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102 va_list param) {
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103
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104 char fmtbuf[300];
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105
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106 snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", format);
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107
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108 _dropbear_log(LOG_INFO, fmtbuf, param);
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109
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110 exit(exitcode);
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111 }
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112
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113 void fail_assert(const char* expr, const char* file, int line) {
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114 dropbear_exit("Failed assertion (%s:%d): `%s'", file, line, expr);
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115 }
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116
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117 static void generic_dropbear_log(int UNUSED(priority), const char* format,
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118 va_list param) {
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119
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120 char printbuf[1024];
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121
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122 vsnprintf(printbuf, sizeof(printbuf), format, param);
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123
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124 fprintf(stderr, "%s\n", printbuf);
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125
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126 }
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127
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128 /* this is what can be called to write arbitrary log messages */
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129 void dropbear_log(int priority, const char* format, ...) {
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130
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131 va_list param;
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132
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133 va_start(param, format);
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134 _dropbear_log(priority, format, param);
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135 va_end(param);
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136 }
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138
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139 #ifdef DEBUG_TRACE
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140 void dropbear_trace(const char* format, ...) {
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141
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142 va_list param;
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143
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144 if (!debug_trace) {
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145 return;
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146 }
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147
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148 va_start(param, format);
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149 fprintf(stderr, "TRACE (%d): ", getpid());
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150 vfprintf(stderr, format, param);
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151 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
152 va_end(param);
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diff changeset
153 }
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
154 #endif /* DEBUG_TRACE */
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diff changeset
155
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
156 static void set_sock_priority(int sock) {
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
157
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
158 int val;
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
159
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
160 /* disable nagle */
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
161 val = 1;
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
162 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val));
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
163
629
bdadc7f4b97d Set IPTOS_LOWDELAY for IPv6 too
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parents: 627
diff changeset
164 /* set the TOS bit for either ipv4 or ipv6 */
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
165 #ifdef IPTOS_LOWDELAY
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diff changeset
166 val = IPTOS_LOWDELAY;
639
452bcf810e44 Put better #if guards around IPv6 socket options for IPV6_TCLASS and
Matt Johnston <matt@ucc.asn.au>
parents: 629
diff changeset
167 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
629
bdadc7f4b97d Set IPTOS_LOWDELAY for IPv6 too
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parents: 627
diff changeset
168 setsockopt(sock, IPPROTO_IPV6, IPV6_TCLASS, (void*)&val, sizeof(val));
bdadc7f4b97d Set IPTOS_LOWDELAY for IPv6 too
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parents: 627
diff changeset
169 #endif
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
170 setsockopt(sock, IPPROTO_IP, IP_TOS, (void*)&val, sizeof(val));
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diff changeset
171 #endif
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diff changeset
172
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
173 #ifdef SO_PRIORITY
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diff changeset
174 /* linux specific, sets QoS class.
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diff changeset
175 * 6 looks to be optimal for interactive traffic (see tc-prio(8) ). */
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diff changeset
176 val = 6;
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diff changeset
177 setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &val, sizeof(val));
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
178 #endif
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diff changeset
179
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
180 }
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
181
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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diff changeset
182 /* Listen on address:port.
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diff changeset
183 * Special cases are address of "" listening on everything,
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diff changeset
184 * and address of NULL listening on localhost only.
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
185 * Returns the number of sockets bound on success, or -1 on failure. On
62
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diff changeset
186 * failure, if errstring wasn't NULL, it'll be a newly malloced error
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diff changeset
187 * string.*/
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diff changeset
188 int dropbear_listen(const char* address, const char* port,
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parents: 51
diff changeset
189 int *socks, unsigned int sockcount, char **errstring, int *maxfd) {
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diff changeset
190
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
191 struct addrinfo hints, *res = NULL, *res0 = NULL;
62
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diff changeset
192 int err;
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diff changeset
193 unsigned int nsock;
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diff changeset
194 struct linger linger;
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diff changeset
195 int val;
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diff changeset
196 int sock;
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diff changeset
197
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
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diff changeset
198 TRACE(("enter dropbear_listen"))
62
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diff changeset
199
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diff changeset
200 memset(&hints, 0, sizeof(hints));
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diff changeset
201 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */
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diff changeset
202 hints.ai_socktype = SOCK_STREAM;
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
203
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
204 /* for calling getaddrinfo:
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
205 address == NULL and !AI_PASSIVE: local loopback
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
206 address == NULL and AI_PASSIVE: all interfaces
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
207 address != NULL: whatever the address says */
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
208 if (!address) {
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
209 TRACE(("dropbear_listen: local loopback"))
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
210 } else {
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
211 if (address[0] == '\0') {
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
212 TRACE(("dropbear_listen: all interfaces"))
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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parents: 251
diff changeset
213 address = NULL;
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
214 }
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
215 hints.ai_flags = AI_PASSIVE;
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
216 }
62
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parents: 51
diff changeset
217 err = getaddrinfo(address, port, &hints, &res0);
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diff changeset
218
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diff changeset
219 if (err) {
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diff changeset
220 if (errstring != NULL && *errstring == NULL) {
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diff changeset
221 int len;
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diff changeset
222 len = 20 + strlen(gai_strerror(err));
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diff changeset
223 *errstring = (char*)m_malloc(len);
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diff changeset
224 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
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diff changeset
225 }
239
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
226 if (res0) {
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
227 freeaddrinfo(res0);
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
228 res0 = NULL;
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
229 }
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
230 TRACE(("leave dropbear_listen: failed resolving"))
62
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diff changeset
231 return -1;
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diff changeset
232 }
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diff changeset
233
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diff changeset
234
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diff changeset
235 nsock = 0;
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diff changeset
236 for (res = res0; res != NULL && nsock < sockcount;
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parents: 51
diff changeset
237 res = res->ai_next) {
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diff changeset
238
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diff changeset
239 /* Get a socket */
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parents: 51
diff changeset
240 socks[nsock] = socket(res->ai_family, res->ai_socktype,
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parents: 51
diff changeset
241 res->ai_protocol);
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parents: 51
diff changeset
242
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diff changeset
243 sock = socks[nsock]; /* For clarity */
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diff changeset
244
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diff changeset
245 if (sock < 0) {
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parents: 51
diff changeset
246 err = errno;
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
247 TRACE(("socket() failed"))
62
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parents: 51
diff changeset
248 continue;
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parents: 51
diff changeset
249 }
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diff changeset
250
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diff changeset
251 /* Various useful socket options */
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parents: 51
diff changeset
252 val = 1;
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diff changeset
253 /* set to reuse, quick timeout */
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diff changeset
254 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val));
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parents: 51
diff changeset
255 linger.l_onoff = 1;
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parents: 51
diff changeset
256 linger.l_linger = 5;
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parents: 51
diff changeset
257 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger));
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parents: 51
diff changeset
258
639
452bcf810e44 Put better #if guards around IPv6 socket options for IPV6_TCLASS and
Matt Johnston <matt@ucc.asn.au>
parents: 629
diff changeset
259 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
627
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
260 if (res->ai_family == AF_INET6) {
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
261 int on = 1;
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
262 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
263 &on, sizeof(on)) == -1) {
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
264 dropbear_log(LOG_WARNING, "Couldn't set IPV6_V6ONLY");
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
265 }
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
266 }
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
267 #endif
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
268
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
Matt Johnston <matt@ucc.asn.au>
parents: 242
diff changeset
269 set_sock_priority(sock);
62
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parents: 51
diff changeset
270
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parents: 51
diff changeset
271 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
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parents: 51
diff changeset
272 err = errno;
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parents: 51
diff changeset
273 close(sock);
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
274 TRACE(("bind(%s) failed", port))
62
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parents: 51
diff changeset
275 continue;
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parents: 51
diff changeset
276 }
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parents: 51
diff changeset
277
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parents: 51
diff changeset
278 if (listen(sock, 20) < 0) {
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parents: 51
diff changeset
279 err = errno;
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parents: 51
diff changeset
280 close(sock);
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
281 TRACE(("listen() failed"))
62
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parents: 51
diff changeset
282 continue;
20563735e8b5 just checkpointing
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parents: 51
diff changeset
283 }
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parents: 51
diff changeset
284
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parents: 51
diff changeset
285 *maxfd = MAX(*maxfd, sock);
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parents: 51
diff changeset
286
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parents: 51
diff changeset
287 nsock++;
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parents: 51
diff changeset
288 }
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parents: 51
diff changeset
289
239
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
290 if (res0) {
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
291 freeaddrinfo(res0);
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
292 res0 = NULL;
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
293 }
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
294
62
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Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
295 if (nsock == 0) {
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Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
296 if (errstring != NULL && *errstring == NULL) {
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parents: 51
diff changeset
297 int len;
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parents: 51
diff changeset
298 len = 20 + strlen(strerror(err));
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parents: 51
diff changeset
299 *errstring = (char*)m_malloc(len);
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
300 snprintf(*errstring, len, "Error listening: %s", strerror(err));
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
301 }
408
28b10e93685c Fix failure-handling in dropbear_listen() when errstring is unset
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
302 TRACE(("leave dropbear_listen: failure, %s", strerror(err)))
28b10e93685c Fix failure-handling in dropbear_listen() when errstring is unset
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
303 return -1;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
304 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
305
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
306 TRACE(("leave dropbear_listen: success, %d socks bound", nsock))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
307 return nsock;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
308 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
309
547
cf376c696dfc Make it compile, update for changes in channel structure.
Matt Johnston <matt@ucc.asn.au>
parents: 500
diff changeset
310 /* 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
311 #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
312 int connect_unix(const char* path) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
313 struct sockaddr_un addr;
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
314 int fd = -1;
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
315
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
316 memset((void*)&addr, 0x0, sizeof(addr));
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
317 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
318 strlcpy(addr.sun_path, path, sizeof(addr.sun_path));
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
319 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
320 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
321 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
322 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
323 }
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
324 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
325 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
326 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
327 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
328 }
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
329 return fd;
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
330 }
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
331 #endif
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
332
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
333 /* Connect via TCP to a host. Connection will try ipv4 or ipv6, will
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
334 * return immediately if nonblocking is set. On failure, if errstring
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
335 * wasn't null, it will be a newly malloced error message */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
336
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
337 /* TODO: maxfd */
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
338 int connect_remote(const char* remotehost, const char* remoteport,
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
339 int nonblocking, char ** errstring) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
340
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
341 struct addrinfo *res0 = NULL, *res = NULL, hints;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
342 int sock;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
343 int err;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
344
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
345 TRACE(("enter connect_remote"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
346
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
347 if (errstring != NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
348 *errstring = NULL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
349 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
350
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
351 memset(&hints, 0, sizeof(hints));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
352 hints.ai_socktype = SOCK_STREAM;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
353 hints.ai_family = PF_UNSPEC;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
354
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
355 err = getaddrinfo(remotehost, remoteport, &hints, &res0);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
356 if (err) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
357 if (errstring != NULL && *errstring == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
358 int len;
490
bd2634b03b12 - Improve DNS failure message to include lookup host
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
359 len = 100 + strlen(gai_strerror(err));
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
360 *errstring = (char*)m_malloc(len);
490
bd2634b03b12 - Improve DNS failure message to include lookup host
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
361 snprintf(*errstring, len, "Error resolving '%s' port '%s'. %s",
bd2634b03b12 - Improve DNS failure message to include lookup host
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
362 remotehost, remoteport, gai_strerror(err));
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
363 }
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
364 TRACE(("Error resolving: %s", gai_strerror(err)))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
365 return -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
366 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
367
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
368 sock = -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
369 err = EADDRNOTAVAIL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
370 for (res = res0; res; res = res->ai_next) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
371
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
372 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
373 if (sock < 0) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
374 err = errno;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
375 continue;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
376 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
377
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
378 if (nonblocking) {
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
379 setnonblocking(sock);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
380 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
381
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
382 if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) {
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
383 if (errno == EINPROGRESS && nonblocking) {
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
384 TRACE(("Connect in progress"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
385 break;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
386 } else {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
387 err = errno;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
388 close(sock);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
389 sock = -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
390 continue;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
391 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
392 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
393
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
394 break; /* Success */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
395 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
396
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
397 if (sock < 0 && !(errno == EINPROGRESS && nonblocking)) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
398 /* Failed */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
399 if (errstring != NULL && *errstring == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
400 int len;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
401 len = 20 + strlen(strerror(err));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
402 *errstring = (char*)m_malloc(len);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
403 snprintf(*errstring, len, "Error connecting: %s", strerror(err));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
404 }
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
405 TRACE(("Error connecting: %s", strerror(err)))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
406 } else {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
407 /* Success */
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
Matt Johnston <matt@ucc.asn.au>
parents: 242
diff changeset
408 set_sock_priority(sock);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
409 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
410
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
411 freeaddrinfo(res0);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
412 if (sock > 0 && errstring != NULL && *errstring != NULL) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
413 m_free(*errstring);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
414 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
415
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
416 TRACE(("leave connect_remote: sock %d\n", sock))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
417 return sock;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
418 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
419
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
420 /* Sets up a pipe for a, returning three non-blocking file descriptors
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
421 * 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
422 * 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
423 * 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
424 * 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
425 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
426 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
427 int infds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
428 int outfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
429 int errfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
430 pid_t pid;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
431
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
432 const int FDIN = 0;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
433 const int FDOUT = 1;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
434
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
435 /* 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
436 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
437 return DROPBEAR_FAILURE;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
438 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
439 if (pipe(outfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
440 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
441 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
442 if (ret_errfd && pipe(errfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
443 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
444 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
445
667
fc7ae88e63b3 Rename HAVE_FORK to USE_VFORK
Matt Johnston <matt@ucc.asn.au>
parents: 666
diff changeset
446 #ifdef USE_VFORK
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
447 pid = vfork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
448 #else
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
449 pid = fork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
450 #endif
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
451
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
452 if (pid < 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
453 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
454 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
455
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
456 if (!pid) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
457 /* child */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
458
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
459 TRACE(("back to normal sigchld"))
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
460 /* Revert to normal sigchld handling */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
461 if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
462 dropbear_exit("signal() error");
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
463 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
464
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
465 /* redirect stdin/stdout */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
466
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
467 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) ||
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
468 (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
469 (ret_errfd && dup2(errfds[FDOUT], STDERR_FILENO) < 0)) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
470 TRACE(("leave noptycommand: error redirecting FDs"))
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
471 dropbear_exit("Child dup2() failure");
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
472 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
473
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
474 close(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
475 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
476 close(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
477 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
478 if (ret_errfd)
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
479 {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
480 close(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
481 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
482 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
483
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
484 exec_fn(exec_data);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
485 /* not reached */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
486 return DROPBEAR_FAILURE;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
487 } else {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
488 /* parent */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
489 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
490 close(outfds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
491
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
492 setnonblocking(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
493 setnonblocking(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
494
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
495 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
496 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
497 setnonblocking(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
498 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
499
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
500 if (ret_pid) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
501 *ret_pid = pid;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
502 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
503
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
504 *ret_writefd = infds[FDOUT];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
505 *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
506 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
507 *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
508 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
509 return DROPBEAR_SUCCESS;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
510 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
511 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
512
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
513 /* 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
514 * 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
515 */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
516 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
517 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
518 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
519 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
520
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
521 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
522
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
523 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
524 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
525 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
526 /* 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
527 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
528 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
529 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
530 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
531
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
532 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
533 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
534 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
535 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
536 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
537 /* 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
538 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
539 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
540
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
541 /* 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
542 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
543 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
544 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
545
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
546 /* 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
547 * 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
548 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
549 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
550 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
551
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
552 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
553 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
554
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
555 void get_socket_address(int fd, char **local_host, char **local_port,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
556 char **remote_host, char **remote_port, int host_lookup)
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
557 {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
558 struct sockaddr_storage addr;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
559 socklen_t addrlen;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
560
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
561 if (local_host || local_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
562 addrlen = sizeof(addr);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
563 if (getsockname(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
564 dropbear_exit("Failed socket address: %s", strerror(errno));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
565 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
566 getaddrstring(&addr, local_host, local_port, host_lookup);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
567 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
568 if (remote_host || remote_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
569 addrlen = sizeof(addr);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
570 if (getpeername(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
571 dropbear_exit("Failed socket address: %s", strerror(errno));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
572 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
573 getaddrstring(&addr, remote_host, remote_port, host_lookup);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
574 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
575 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
576
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577 /* Return a string representation of the socket address passed. The return
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 * value is allocated with malloc() */
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
579 void getaddrstring(struct sockaddr_storage* addr,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
580 char **ret_host, char **ret_port,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
581 int host_lookup) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
582
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
583 char host[NI_MAXHOST+1], serv[NI_MAXSERV+1];
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
584 unsigned int len;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
585 int ret;
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
586
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
587 int flags = NI_NUMERICSERV | NI_NUMERICHOST;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
588
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
589 #ifndef DO_HOST_LOOKUP
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
590 host_lookup = 0;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
591 #endif
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
592
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
593 if (host_lookup) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
594 flags = NI_NUMERICSERV;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
595 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
596
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
597 len = sizeof(struct sockaddr_storage);
160
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
598 /* Some platforms such as Solaris 8 require that len is the length
335
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
599 * of the specific structure. Some older linux systems (glibc 2.1.3
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
600 * such as debian potato) have sockaddr_storage.__ss_family instead
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
601 * but we'll ignore them */
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
602 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
160
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
603 if (addr->ss_family == AF_INET) {
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
604 len = sizeof(struct sockaddr_in);
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
605 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
606 #ifdef AF_INET6
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
607 if (addr->ss_family == AF_INET6) {
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
608 len = sizeof(struct sockaddr_in6);
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
609 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
610 #endif
335
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
611 #endif
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
612
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
613 ret = getnameinfo((struct sockaddr*)addr, len, host, sizeof(host)-1,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
614 serv, sizeof(serv)-1, flags);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
615
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
616 if (ret != 0) {
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
617 if (host_lookup) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
618 /* On some systems (Darwin does it) we get EINTR from getnameinfo
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
619 * somehow. Eew. So we'll just return the IP, since that doesn't seem
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
620 * to exhibit that behaviour. */
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
621 getaddrstring(addr, ret_host, ret_port, 0);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
622 return;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
623 } else {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
624 /* if we can't do a numeric lookup, something's gone terribly wrong */
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
625 dropbear_exit("Failed lookup: %s", gai_strerror(ret));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
626 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
627 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
628
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
629 if (ret_host) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
630 *ret_host = m_strdup(host);
160
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
631 }
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
632 if (ret_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
633 *ret_port = m_strdup(serv);
160
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
634 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
635 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
636
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
637 #ifdef DEBUG_TRACE
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
638 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
639
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
640 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
641
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
642 fprintf(stderr, "%s\n", label);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
643 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
644 fprintf(stderr, "%02x", buf[i]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
645 if (i % 16 == 15) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
646 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
648 else if (i % 2 == 1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
649 fprintf(stderr, " ");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
650 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
653 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
654 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
656 /* 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
657 * for '\n', '\r' and '\t'.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658 * 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
659 * use */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660 char * stripcontrol(const char * text) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
661
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
662 char * ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
663 int len, pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
664 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
666 len = strlen(text);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
667 ret = m_malloc(len+1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
668
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
669 pos = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
670 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
671 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
672 || 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
673 ret[pos] = text[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
674 pos++;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
675 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
676 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
677 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
679 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
680
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
681
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
682 /* 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
683 * 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
684 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
685 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
686
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
687 int fd = -1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
688 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
689 int maxlen;
358
e81d3bc1dc78 Forgot variable declaration.
Matt Johnston <matt@ucc.asn.au>
parents: 357
diff changeset
690 int ret = DROPBEAR_FAILURE;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
691
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
692 fd = open(filename, O_RDONLY);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
693
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
694 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
695 goto out;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
696 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
697
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
698 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
699 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
700 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
701 if (len < 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
702 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
703 continue;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
704 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
705 goto out;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
706 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
707 buf_incrwritepos(buf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
708 } while (len < maxlen && len > 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
709
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
710 ret = DROPBEAR_SUCCESS;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
711
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
712 out:
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
713 if (fd >= 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
714 m_close(fd);
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
715 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
716 return ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
717 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
718
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
719 /* 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
720 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
721 * 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
722 /* 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
723 #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
724 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
725
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
726 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
727
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
728 TRACE(("enter buf_getline"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
729
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
730 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
731 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
732
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
733 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
734
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
735 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
736 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
737 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
738 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
739
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
740 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
741 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
742
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
743 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
744 /* 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
745 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
746 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
747
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
748 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
749
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
750
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
751 /* 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
752 if (c == EOF && line->pos == 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
753 TRACE(("leave buf_getline: failure"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
754 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
755 } else {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
756 TRACE(("leave buf_getline: success"))
117
e0acad552a92 Read the last line of a file without a finishing '\n' correctly
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
757 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
758 return DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
759 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
760
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
761 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
762 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
763
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
764 /* make sure that the socket closes */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
765 void m_close(int fd) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
766
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
767 int val;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
768 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
769 val = close(fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
770 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
771
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
772 if (val < 0 && errno != EBADF) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
773 /* Linux says EIO can happen */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
774 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
775 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
776 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
777
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
778 void * m_malloc(size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
779
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
780 void* ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
781
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
782 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
783 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
784 }
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
785 ret = calloc(1, size);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
786 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
788 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
789 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
790
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
791 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
792
11
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
793 void * m_strdup(const char * str) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
794 char* ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
795
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
796 ret = strdup(str);
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
797 if (ret == NULL) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
798 dropbear_exit("m_strdup failed");
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
799 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
800 return ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
801 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
802
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
803 void * m_realloc(void* ptr, size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
804
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
805 void *ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
806
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
808 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
809 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
810 ret = realloc(ptr, size);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
811 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
812 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
813 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
814 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
815 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
816
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817 /* Clear the data, based on the method in David Wheeler's
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
818 * "Secure Programming for Linux and Unix HOWTO" */
161
b9d3f725e00b 0.44 release changes
Matt Johnston <matt@ucc.asn.au>
parents: 160
diff changeset
819 /* Beware of calling this from within dbutil.c - things might get
b9d3f725e00b 0.44 release changes
Matt Johnston <matt@ucc.asn.au>
parents: 160
diff changeset
820 * optimised away */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
821 void m_burn(void *data, unsigned int len) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
822 volatile char *p = data;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
823
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
824 if (data == NULL)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
825 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
826 while (len--) {
655
76e780c74a5e - Burn buffers to 0x00 instead
Matt Johnston <matt@ucc.asn.au>
parents: 639
diff changeset
827 *p++ = 0x0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
828 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
829 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
830
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
831
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
832 void setnonblocking(int fd) {
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
833
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
834 TRACE(("setnonblocking: %d", fd))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
835
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
836 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
837 if (errno == ENODEV) {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
838 /* 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
839 * 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
840 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
841 } else {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
842 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
843 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
844 }
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
845 TRACE(("leave setnonblocking"))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
846 }
425
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
847
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
848 void disallow_core() {
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
849 struct rlimit lim;
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
850 lim.rlim_cur = lim.rlim_max = 0;
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
851 setrlimit(RLIMIT_CORE, &lim);
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
852 }
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
853
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
854 /* 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
855 int m_str_to_uint(const char* str, unsigned int *val) {
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
856 errno = 0;
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
857 *val = strtoul(str, NULL, 10);
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
858 /* 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
859 * I've looked at mention it in their manpage */
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
860 if ((*val == 0 && errno == EINVAL)
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
861 || (*val == ULONG_MAX && errno == ERANGE)) {
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
862 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
863 } else {
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
864 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
865 }
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
866 }