prosody
e3de64f7c44d
util/dependencies.lua

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util/dependencies.lua @ 6401:e3de64f7c44d

core.stanza_router: Stricter validation of stanzas
author Kim Alvefur <zash@zash.se>
date Tue, 09 Sep 2014 14:42:10 +0200
parent 6065:9ab23488a17c
child 6067:dab7ad6fa23c
child 7675:decb657bc0a0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 module("dependencies", package.seeall)
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10
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11 function softreq(...) local ok, lib = pcall(require, ...); if ok then return lib; else return nil, lib; end end
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12
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13 -- Required to be able to find packages installed with luarocks
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14 if not softreq "luarocks.loader" then -- LuaRocks 2.x
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15 softreq "luarocks.require"; -- LuaRocks <1.x
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16 end
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17
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18 function missingdep(name, sources, msg)
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19 print("");
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20 print("**************************");
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21 print("Prosody was unable to find "..tostring(name));
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22 print("This package can be obtained in the following ways:");
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23 print("");
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24 local longest_platform = 0;
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25 for platform in pairs(sources) do
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26 longest_platform = math.max(longest_platform, #platform);
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27 end
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28 for platform, source in pairs(sources) do
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29 print("", platform..":"..(" "):rep(4+longest_platform-#platform)..source);
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30 end
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31 print("");
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32 print(msg or (name.." is required for Prosody to run, so we will now exit."));
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33 print("More help can be found on our website, at http://prosody.im/doc/depends");
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34 print("**************************");
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35 print("");
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36 end
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37
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38 -- COMPAT w/pre-0.8 Debian: The Debian config file used to use
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39 -- util.ztact, which has been removed from Prosody in 0.8. This
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40 -- is to log an error for people who still use it, so they can
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41 -- update their configs.
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42 package.preload["util.ztact"] = function ()
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43 if not package.loaded["core.loggingmanager"] then
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44 error("util.ztact has been removed from Prosody and you need to fix your config "
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45 .."file. More information can be found at http://prosody.im/doc/packagers#ztact", 0);
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46 else
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47 error("module 'util.ztact' has been deprecated in Prosody 0.8.");
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48 end
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49 end;
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50
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51 function check_dependencies()
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52 if _VERSION ~= "Lua 5.1" then
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53 print "***********************************"
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54 print("Unsupported Lua version: ".._VERSION);
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55 print("Only Lua 5.1 is supported.");
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56 print "***********************************"
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57 return false;
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58 end
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59
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60 local fatal;
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61
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62 local lxp = softreq "lxp"
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63
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64 if not lxp then
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65 missingdep("luaexpat", {
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66 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-expat0";
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67 ["luarocks"] = "luarocks install luaexpat";
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68 ["Source"] = "http://www.keplerproject.org/luaexpat/";
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69 });
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70 fatal = true;
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71 end
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72
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73 local socket = softreq "socket"
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74
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75 if not socket then
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76 missingdep("luasocket", {
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77 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-socket2";
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78 ["luarocks"] = "luarocks install luasocket";
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79 ["Source"] = "http://www.tecgraf.puc-rio.br/~diego/professional/luasocket/";
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80 });
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81 fatal = true;
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82 end
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83
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84 local lfs, err = softreq "lfs"
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85 if not lfs then
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86 missingdep("luafilesystem", {
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87 ["luarocks"] = "luarocks install luafilesystem";
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88 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-filesystem0";
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89 ["Source"] = "http://www.keplerproject.org/luafilesystem/";
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90 });
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91 fatal = true;
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92 end
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93
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94 local ssl = softreq "ssl"
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95
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96 if not ssl then
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97 missingdep("LuaSec", {
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98 ["Debian/Ubuntu"] = "http://prosody.im/download/start#debian_and_ubuntu";
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99 ["luarocks"] = "luarocks install luasec";
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100 ["Source"] = "http://www.inf.puc-rio.br/~brunoos/luasec/";
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101 }, "SSL/TLS support will not be available");
413
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102 end
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103
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104 local encodings, err = softreq "util.encodings"
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105 if not encodings then
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106 if err:match("not found") then
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107 missingdep("util.encodings", { ["Windows"] = "Make sure you have encodings.dll from the Prosody distribution in util/";
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108 ["GNU/Linux"] = "Run './configure' and 'make' in the Prosody source directory to build util/encodings.so";
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109 });
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110 else
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111 print "***********************************"
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112 print("util/encodings couldn't be loaded. Check that you have a recent version of libidn");
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113 print ""
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114 print("The full error was:");
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115 print(err)
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116 print "***********************************"
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117 end
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118 fatal = true;
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119 end
408
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120
2510
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121 local hashes, err = softreq "util.hashes"
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122 if not hashes then
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123 if err:match("not found") then
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124 missingdep("util.hashes", { ["Windows"] = "Make sure you have hashes.dll from the Prosody distribution in util/";
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125 ["GNU/Linux"] = "Run './configure' and 'make' in the Prosody source directory to build util/hashes.so";
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126 });
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127 else
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128 print "***********************************"
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129 print("util/hashes couldn't be loaded. Check that you have a recent version of OpenSSL (libcrypto in particular)");
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130 print ""
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131 print("The full error was:");
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132 print(err)
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133 print "***********************************"
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134 end
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135 fatal = true;
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136 end
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137 return not fatal;
408
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138 end
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139
3904
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140 function log_warnings()
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141 if ssl then
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142 local major, minor, veryminor, patched = ssl._VERSION:match("(%d+)%.(%d+)%.?(%d*)(M?)");
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143 if not major or ((tonumber(major) == 0 and (tonumber(minor) or 0) <= 3 and (tonumber(veryminor) or 0) <= 2) and patched ~= "M") then
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144 log("error", "This version of LuaSec contains a known bug that causes disconnects, see http://prosody.im/doc/depends");
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145 end
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146 end
4426
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147 if lxp then
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148 if not pcall(lxp.new, { StartDoctypeDecl = false }) then
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149 log("error", "The version of LuaExpat on your system leaves Prosody "
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150 .."vulnerable to denial-of-service attacks. You should upgrade to "
6043
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151 .."LuaExpat 1.3.0 or higher as soon as possible. See "
29d2dd705148 util.dependencies: Log error when LuaExpat is not capable of enforcing stanza size limits
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152 .."http://prosody.im/doc/depends#luaexpat for more information.");
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153 end
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154 if not lxp.new({}).getcurrentbytecount then
29d2dd705148 util.dependencies: Log error when LuaExpat is not capable of enforcing stanza size limits
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155 log("error", "The version of LuaExpat on your system does not support "
29d2dd705148 util.dependencies: Log error when LuaExpat is not capable of enforcing stanza size limits
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156 .."stanza size limits, which may leave servers on untrusted "
29d2dd705148 util.dependencies: Log error when LuaExpat is not capable of enforcing stanza size limits
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157 .."networks (e.g. the internet) vulnerable to denial-of-service "
29d2dd705148 util.dependencies: Log error when LuaExpat is not capable of enforcing stanza size limits
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158 .."attacks. You should upgrade to LuaExpat 1.3.0 or higher as "
29d2dd705148 util.dependencies: Log error when LuaExpat is not capable of enforcing stanza size limits
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159 .."soon as possible. See "
4426
ee65aa40ef60 util.dependencies, util.xmppstream: Move LuaExpat version checking to util.dependencies.
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160 .."http://prosody.im/doc/depends#luaexpat for more information.");
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161 end
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162 end
3904
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163 end
742
b9f59372eb4e util.dependencies: Show useful messages when our own libraries are not found, too
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164
2510
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165 return _M;