prosody-modules
22935ef37284
mod_auth_wordpress/mod_auth_wordpress.lua

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mod_auth_wordpress/mod_auth_wordpress.lua @ 424:22935ef37284

mod_auth_wordpress: Rename functions to match module name
author Kim Alvefur <zash@zash.se>
date Sun, 11 Sep 2011 21:59:01 +0200
parent 423:524dda2ecb6a
child 425:34eb9df9e37f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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423
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1 -- Wordpress 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 log = require "util.logger".init("auth_sql");
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7 local new_sasl = require "util.sasl".new;
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8 local nodeprep = require "util.encodings".stringprep.nodeprep;
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9 local saslprep = require "util.encodings".stringprep.saslprep;
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10 local DBI = require "DBI"
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11 local md5 = require "util.hashes".md5;
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12 local uuid_gen = require "util.uuid".generate;
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13
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14 local connection;
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15 local params = module:get_option("sql");
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16
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17 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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18
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19 local function test_connection()
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20 if not connection then return nil; end
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21 if connection:ping() then
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22 return true;
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23 else
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24 module:log("debug", "Database connection closed");
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25 connection = nil;
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26 end
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27 end
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28 local function connect()
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29 if not test_connection() then
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30 prosody.unlock_globals();
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31 local dbh, err = DBI.Connect(
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32 params.driver, params.database,
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33 params.username, params.password,
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34 params.host, params.port
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35 );
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36 prosody.lock_globals();
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37 if not dbh then
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38 module:log("debug", "Database connection failed: %s", tostring(err));
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39 return nil, err;
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40 end
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41 module:log("debug", "Successfully connected to database");
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42 dbh:autocommit(true); -- don't run in transaction
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43 connection = dbh;
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44 return connection;
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45 end
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46 end
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47
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48 do -- process options to get a db connection
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49 params = params or { driver = "SQLite3" };
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50
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51 if params.driver == "SQLite3" then
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52 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
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53 end
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54
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55 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
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56
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57 assert(connect());
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58 end
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59
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60 local function getsql(sql, ...)
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61 if params.driver == "PostgreSQL" then
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62 sql = sql:gsub("`", "\"");
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63 end
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64 if not test_connection() then connect(); end
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65 -- do prepared statement stuff
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66 local stmt, err = connection:prepare(sql);
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67 if not stmt and not test_connection() then error("connection failed"); end
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68 if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
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69 -- run query
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70 local ok, err = stmt:execute(...);
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71 if not ok and not test_connection() then error("connection failed"); end
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72 if not ok then return nil, err; end
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73
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74 return stmt;
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75 end
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76 local function setsql(sql, ...)
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77 local stmt, err = getsql(sql, ...);
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78 if not stmt then return stmt, err; end
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79 return stmt:affected();
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80 end
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81
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82 local function get_password(username)
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83 local stmt, err = getsql("SELECT `user_pass` FROM `wp_users` WHERE `user_login`=?", username);
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84 if stmt then
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85 for row in stmt:rows(true) do
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86 return row.user_password;
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87 end
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88 end
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89 end
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90
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91
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92 local itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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93 local function hashEncode64(input, count)
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94 local output = "";
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95 local i, value = 0, 0;
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96
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97 while true do
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98 value = input:byte(i+1)
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99 i = i+1;
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100 local idx = value % 0x40 + 1;
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101 output = output .. itoa64:sub(idx, idx);
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102
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103 if i < count then
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104 value = value + input:byte(i+1) * 256;
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105 end
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106 local _ = value % (2^6);
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107 local idx = ((value - _) / (2^6)) % 0x40 + 1
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108 output = output .. itoa64:sub(idx, idx);
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109
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110 if i >= count then break; end
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111 i = i+1;
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112
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113 if i < count then
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114 value = value + input:byte(i+1) * 256 * 256;
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115 end
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116 local _ = value % (2^12);
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117 local idx = ((value - _) / (2^12)) % 0x40 + 1
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118 output = output .. itoa64:sub(idx, idx);
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119
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120 if i >= count then break; end
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121 i = i+1;
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122
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123 local _ = value % (2^18);
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124 local idx = ((value - _) / (2^18)) % 0x40 + 1
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125 output = output .. itoa64:sub(idx, idx);
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126
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127 if not(i < count) then break; end
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128 end
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129 return output;
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130 end
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131 local function hashCryptPrivate(password, genSalt)
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132 local output = "*";
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133 if not genSalt:match("^%$P%$") then return output; end
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134
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135 local count_log2 = itoa64:find(genSalt:sub(4,4)) - 1;
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136 if count_log2 < 7 or count_log2 > 30 then return output; end
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137
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138 local count = 2 ^ count_log2;
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139 local salt = genSalt:sub(5, 12);
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140
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141 if #salt ~= 8 then return output; end
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142
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143 local hash = md5(salt..password);
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144
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145 while true do
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146 hash = md5(hash..password);
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147 if not(count > 1) then break; end
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148 count = count-1;
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149 end
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150
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151 output = genSalt:sub(1, 12);
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152 output = output .. hashEncode64(hash, 16);
373
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153
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154 return output;
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155 end
377
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156 local function hashGensaltPrivate(input)
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157 local iteration_count_log2 = 6;
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158 local output = "$H$";
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159 local idx = math.min(iteration_count_log2 + 5, 30) + 1;
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160 output = output .. itoa64:sub(idx, idx);
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161 output = output .. hashEncode64(input, 6);
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162 return output;
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163 end
424
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164 local function wordpressCheckHash(password, hash)
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165 if #hash == 32 then return hash == md5(password, true); end
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166 return #hash == 34 and hashCryptPrivate(password, hash) == hash;
373
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167 end
424
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168 local function wordpressCreateHash(password)
377
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169 local random = uuid_gen():sub(-6);
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170 local salt = hashGensaltPrivate(random);
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171 local hash = hashCryptPrivate(password, salt);
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172 if #hash == 34 then return hash; end
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173 return md5(password, true);
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174 end
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175
373
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176
423
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177 provider = { name = "wordpress" };
373
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178
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179 function provider.test_password(username, password)
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180 local hash = get_password(username);
424
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181 return hash and wordpressCheckHash(password, hash);
373
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182 end
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183 function provider.user_exists(username)
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184 module:log("debug", "test user %s existence", username);
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185 return get_password(username) and true;
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186 end
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187
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188 function provider.get_password(username)
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189 return nil, "Getting password is not supported.";
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190 end
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191 function provider.set_password(username, password)
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192 local hash = wordpressCreateHash(password);
423
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193 local stmt, err = setsql("UPDATE `wp_users` SET `user_pass`=? WHERE `user_login`=?", hash, username);
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diff changeset
194 return stmt and true, err;
373
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195 end
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196 function provider.create_user(username, password)
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197 return nil, "Account creation/modification not supported.";
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198 end
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199
419
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diff changeset
200 local escapes = {
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201 [" "] = "\\20";
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202 ['"'] = "\\22";
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203 ["&"] = "\\26";
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204 ["'"] = "\\27";
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205 ["/"] = "\\2f";
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206 [":"] = "\\3a";
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diff changeset
207 ["<"] = "\\3c";
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diff changeset
208 [">"] = "\\3e";
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209 ["@"] = "\\40";
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parents: 377
diff changeset
210 ["\\"] = "\\5c";
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diff changeset
211 };
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diff changeset
212 local unescapes = {};
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diff changeset
213 for k,v in pairs(escapes) do unescapes[v] = k; end
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diff changeset
214 local function jid_escape(s) return s and (s:gsub(".", escapes)); end
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diff changeset
215 local function jid_unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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diff changeset
216
373
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diff changeset
217 function provider.get_sasl_handler()
419
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diff changeset
218 local sasl = {};
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diff changeset
219 function sasl:clean_clone() return provider.get_sasl_handler(); end
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diff changeset
220 function sasl:mechanisms() return { PLAIN = true; }; end
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diff changeset
221 function sasl:select(mechanism)
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parents: 377
diff changeset
222 if not self.selected and mechanism == "PLAIN" then
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diff changeset
223 self.selected = mechanism;
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diff changeset
224 return true;
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diff changeset
225 end
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diff changeset
226 end
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diff changeset
227 function sasl:process(message)
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diff changeset
228 if not message then return "failure", "malformed-request"; end
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diff changeset
229 local authorization, authentication, password = message:match("^([^%z]*)%z([^%z]+)%z([^%z]+)");
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diff changeset
230 if not authorization then return "failure", "malformed-request"; end
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diff changeset
231 authentication = saslprep(authentication);
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diff changeset
232 password = saslprep(password);
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diff changeset
233 if (not password) or (password == "") or (not authentication) or (authentication == "") then
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234 return "failure", "malformed-request", "Invalid username or password.";
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235 end
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diff changeset
236 local function test(authentication)
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diff changeset
237 local prepped = nodeprep(authentication);
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238 local normalized = jid_unescape(prepped);
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diff changeset
239 return normalized and provider.test_password(normalized, password) and prepped;
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diff changeset
240 end
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diff changeset
241 local username = test(authentication) or test(jid_escape(authentication));
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diff changeset
242 if username then
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diff changeset
243 self.username = username;
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diff changeset
244 return "success";
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diff changeset
245 end
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diff changeset
246 return "failure", "not-authorized", "Unable to authorize you with the authentication credentials you've sent.";
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diff changeset
247 end
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diff changeset
248 return sasl;
373
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diff changeset
249 end
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250
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251 module:add_item("auth-provider", provider);
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parents:
diff changeset
252