Mercurial > prosody-modules

annotate mod_auth_joomla/mod_auth_joomla.lua @ 618:267548522810

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mod_carbons: Remove useless protection against loop that can't happen
author Kim Alvefur <zash@zash.se>
date Tue, 28 Feb 2012 14:33:35 +0100
parents 1082856e4612
children 5e71e24e33fc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
422
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1 -- Joomla authentication backend for Prosody
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2 --
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3 -- Copyright (C) 2011 Waqas Hussain
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4 --
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5
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6 local new_sasl = require "util.sasl".new;
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7 local nodeprep = require "util.encodings".stringprep.nodeprep;
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8 local saslprep = require "util.encodings".stringprep.saslprep;
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9 local DBI = require "DBI"
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10 local md5 = require "util.hashes".md5;
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11 local uuid_gen = require "util.uuid".generate;
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12
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13 local connection;
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14 local params = module:get_option("sql");
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15
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16 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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17
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18 local function test_connection()
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19 if not connection then return nil; end
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20 if connection:ping() then
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21 return true;
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22 else
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23 module:log("debug", "Database connection closed");
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24 connection = nil;
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25 end
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26 end
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27 local function connect()
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28 if not test_connection() then
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29 prosody.unlock_globals();
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30 local dbh, err = DBI.Connect(
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31 params.driver, params.database,
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32 params.username, params.password,
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33 params.host, params.port
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34 );
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35 prosody.lock_globals();
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36 if not dbh then
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37 module:log("debug", "Database connection failed: %s", tostring(err));
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38 return nil, err;
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39 end
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40 module:log("debug", "Successfully connected to database");
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41 dbh:autocommit(true); -- don't run in transaction
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42 connection = dbh;
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43 return connection;
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44 end
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45 end
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46
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47 do -- process options to get a db connection
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48 params = params or { driver = "SQLite3" };
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49
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50 if params.driver == "SQLite3" then
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51 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
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52 end
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53
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54 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
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55
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56 assert(connect());
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57 end
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58
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59 local function getsql(sql, ...)
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60 if params.driver == "PostgreSQL" then
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61 sql = sql:gsub("`", "\"");
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62 end
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63 if not test_connection() then connect(); end
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64 -- do prepared statement stuff
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65 local stmt, err = connection:prepare(sql);
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66 if not stmt and not test_connection() then error("connection failed"); end
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67 if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
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68 -- run query
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69 local ok, err = stmt:execute(...);
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70 if not ok and not test_connection() then error("connection failed"); end
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71 if not ok then return nil, err; end
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72
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73 return stmt;
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74 end
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75 local function setsql(sql, ...)
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76 local stmt, err = getsql(sql, ...);
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77 if not stmt then return stmt, err; end
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78 return stmt:affected();
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79 end
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80
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81 local function get_password(username)
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82 local stmt, err = getsql("SELECT `password` FROM `jos_users` WHERE `username`=?", username);
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83 if stmt then
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84 for row in stmt:rows(true) do
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85 return row.password;
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86 end
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87 end
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88 end
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89
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90
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91 local function getCryptedPassword(plaintext, salt)
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92 return md5(plaintext..salt);
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93 end
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94 local function joomlaCheckHash(password, hash)
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95 local crypt, salt = hash:match("^([^:]*):(.*)$");
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96 return (crypt or hash) == getCryptedPassword(password, salt or '');
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97 end
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98 local function joomlaCreateHash(password)
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99 local salt = uuid_gen():gsub("%-", "");
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100 local crypt = getCryptedPassword(password, salt);
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101 return crypt..':'..salt;
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102 end
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103
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104
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105 provider = { name = "joomla" };
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106
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107 function provider.test_password(username, password)
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108 local hash = get_password(username);
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109 return hash and joomlaCheckHash(password, hash);
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110 end
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111 function provider.user_exists(username)
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112 module:log("debug", "test user %s existence", username);
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113 return get_password(username) and true;
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114 end
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115
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116 function provider.get_password(username)
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117 return nil, "Getting password is not supported.";
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118 end
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119 function provider.set_password(username, password)
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120 local hash = joomlaCreateHash(password);
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121 local stmt, err = setsql("UPDATE `jos_users` SET `password`=? WHERE `username`=?", hash, username);
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122 return stmt and true, err;
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123 end
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124 function provider.create_user(username, password)
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125 return nil, "Account creation/modification not supported.";
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126 end
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127
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128 local escapes = {
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129 [" "] = "\\20";
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130 ['"'] = "\\22";
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131 ["&"] = "\\26";
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132 ["'"] = "\\27";
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133 ["/"] = "\\2f";
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134 [":"] = "\\3a";
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135 ["<"] = "\\3c";
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136 [">"] = "\\3e";
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137 ["@"] = "\\40";
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138 ["\\"] = "\\5c";
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139 };
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140 local unescapes = {};
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141 for k,v in pairs(escapes) do unescapes[v] = k; end
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142 local function jid_escape(s) return s and (s:gsub(".", escapes)); end
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143 local function jid_unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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144
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145 function provider.get_sasl_handler()
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146 local sasl = {};
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147 function sasl:clean_clone() return provider.get_sasl_handler(); end
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148 function sasl:mechanisms() return { PLAIN = true; }; end
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149 function sasl:select(mechanism)
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150 if not self.selected and mechanism == "PLAIN" then
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151 self.selected = mechanism;
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152 return true;
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153 end
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154 end
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155 function sasl:process(message)
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156 if not message then return "failure", "malformed-request"; end
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157 local authorization, authentication, password = message:match("^([^%z]*)%z([^%z]+)%z([^%z]+)");
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158 if not authorization then return "failure", "malformed-request"; end
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159 authentication = saslprep(authentication);
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160 password = saslprep(password);
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161 if (not password) or (password == "") or (not authentication) or (authentication == "") then
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162 return "failure", "malformed-request", "Invalid username or password.";
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163 end
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164 local function test(authentication)
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165 local prepped = nodeprep(authentication);
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166 local normalized = jid_unescape(prepped);
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167 return normalized and provider.test_password(normalized, password) and prepped;
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168 end
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169 local username = test(authentication) or test(jid_escape(authentication));
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170 if username then
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171 self.username = username;
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172 return "success";
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173 end
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174 return "failure", "not-authorized", "Unable to authorize you with the authentication credentials you've sent.";
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175 end
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176 return sasl;
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177 end
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178
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179 module:add_item("auth-provider", provider);
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180