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annotate includes.h @ 1715:3974f087d9c0

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Disallow leading lines before the ident for server (#102) Per RFC4253 4.2 clients must be able to process other lines of data before the version string, server behavior is not defined neither with MUST/SHOULD nor with MAY. If server process up to 50 lines too - it may cause too long hanging session with invalid/evil client that consume host resources and potentially may lead to DDoS on poor embedded boxes. Let's require first line from client to be version string and fail early if it's not - matches both RFC and real OpenSSH behavior.
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Mon, 15 Jun 2020 18:22:18 +0500
parents f966834f0f9c
children ca75bb513359
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 #ifndef DROPBEAR_INCLUDES_H_
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26 #define DROPBEAR_INCLUDES_H_
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29 #include "options.h"
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30 #include "debug.h"
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32 #include <sys/types.h>
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33 #include <sys/ioctl.h>
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34 #include <sys/param.h> /* required for BSD4_4 define */
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35 #include <sys/socket.h>
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36 #include <sys/stat.h>
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37 #include <sys/time.h>
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38 #include <sys/un.h>
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39 #include <sys/wait.h>
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40 #include <sys/resource.h>
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42 #include <stdio.h>
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43 #include <errno.h>
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44 #include <fcntl.h>
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45 #include <grp.h>
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46 #include <limits.h>
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47 #include <pwd.h>
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48 #include <signal.h>
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49 #include <stdlib.h>
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50 #include <string.h>
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51 #include <termios.h>
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52 #include <unistd.h>
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53 #include <syslog.h>
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54 #include <netdb.h>
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55 #include <ctype.h>
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56 #include <stdarg.h>
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57 #include <dirent.h>
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58 #include <time.h>
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59 #include <setjmp.h>
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61 #ifdef HAVE_UTMP_H
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62 #include <utmp.h>
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63 #endif
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65 #ifdef HAVE_UTMPX_H
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66 #include <utmpx.h>
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67 #endif
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69 #ifdef HAVE_PATHS_H
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70 #include <paths.h>
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71 #endif
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73 #ifdef HAVE_LASTLOG_H
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74 #include <lastlog.h>
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75 #endif
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77 #ifdef HAVE_NETINET_IN_H
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78 #include <netinet/in.h>
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79 #endif
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81 #include <arpa/inet.h>
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83 /* netbsd 1.6 needs this to be included before netinet/ip.h for some
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84 * undocumented reason */
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85 #ifdef HAVE_NETINET_IN_SYSTM_H
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86 #include <netinet/in_systm.h>
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87 #endif
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89 #include <netinet/ip.h>
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91 #ifdef HAVE_NETINET_TCP_H
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92 #include <netinet/tcp.h>
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93 #endif
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95 #ifdef HAVE_INTTYPES_H
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96 #include <inttypes.h>
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97 #endif
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99 #ifdef HAVE_LIBUTIL_H
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100 #include <libutil.h>
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101 #endif
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103 #ifdef HAVE_CRYPT_H
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104 #include <crypt.h>
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105 #endif
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107 #ifndef DISABLE_ZLIB
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108 #include <zlib.h>
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109 #endif
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111 #ifdef HAVE_UTIL_H
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112 #include <util.h>
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113 #endif
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115 #ifdef HAVE_SHADOW_H
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116 #include <shadow.h>
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117 #endif
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119 #ifdef HAVE_LIBGEN_H
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120 #include <libgen.h>
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121 #endif
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123 #ifdef HAVE_SYS_UIO_H
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124 #include <sys/uio.h>
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125 #endif
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127 #ifdef HAVE_SYS_RANDOM_H
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128 #include <sys/random.h>
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129 #endif
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131 #ifdef BUNDLED_LIBTOM
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132 #include "libtomcrypt/src/headers/tomcrypt.h"
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133 #include "libtommath/tommath.h"
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134 #else
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135 #include <tomcrypt.h>
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136 #include <tommath.h>
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137 #endif
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139 #include "compat.h"
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140
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141 #ifndef HAVE_U_INT8_T
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142 typedef unsigned char u_int8_t;
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143 #endif /* HAVE_U_INT8_T */
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144 #ifndef HAVE_UINT8_T
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145 typedef u_int8_t uint8_t;
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146 #endif /* HAVE_UINT8_T */
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148 #ifndef HAVE_U_INT16_T
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149 typedef unsigned short u_int16_t;
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150 #endif /* HAVE_U_INT16_T */
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151 #ifndef HAVE_UINT16_T
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152 typedef u_int16_t uint16_t;
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153 #endif /* HAVE_UINT16_T */
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154
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155 #ifndef HAVE_U_INT32_T
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156 typedef unsigned int u_int32_t;
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157 #endif /* HAVE_U_INT32_T */
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158 #ifndef HAVE_UINT32_T
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159 typedef u_int32_t uint32_t;
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160 #endif /* HAVE_UINT32_T */
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161
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162 #ifndef SIZE_T_MAX
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163 #define SIZE_T_MAX ULONG_MAX
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164 #endif /* SIZE_T_MAX */
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165
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166 #ifdef HAVE_LINUX_PKT_SCHED_H
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167 #include <linux/types.h>
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168 #include <linux/pkt_sched.h>
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169 #endif
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170
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171 #if DROPBEAR_PLUGIN
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172 #include <dlfcn.h>
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173 #endif
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174
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175 #include "fake-rfc2553.h"
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176
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177 #include "fuzz.h"
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178
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179 #ifndef LOG_AUTHPRIV
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180 #define LOG_AUTHPRIV LOG_AUTH
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181 #endif
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182
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183 /* so we can avoid warnings about unused params (ie in signal handlers etc) */
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184 #ifdef UNUSED
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185 #elif defined(__GNUC__)
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186 # define UNUSED(x) UNUSED_ ## x __attribute__((unused))
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187 #elif defined(__LCLINT__)
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188 # define UNUSED(x) /*@unused@*/ x
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189 #else
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190 # define UNUSED(x) x
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191 #endif
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192
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193 #endif /* DROPBEAR_INCLUDES_H_ */