prosody-modules
a46c2326eed7
mod_auth_wordpress/mod_auth_wordpress.lua

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mod_auth_wordpress/mod_auth_wordpress.lua @ 428:a46c2326eed7

mod_auth_wordpress: Update Copyright
author Kim Alvefur <zash@zash.se>
date Sun, 11 Sep 2011 23:30:06 +0200
parent 427:35b3ea156156
child 814:881ec9919144
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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 -- Copyright (C) 2011 Kim Alvefur
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5 --
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6
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7 local log = require "util.logger".init("auth_sql");
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8 local new_sasl = require "util.sasl".new;
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9 local nodeprep = require "util.encodings".stringprep.nodeprep;
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10 local saslprep = require "util.encodings".stringprep.saslprep;
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11 local DBI = require "DBI"
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12 local md5 = require "util.hashes".md5;
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13 local uuid_gen = require "util.uuid".generate;
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14
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15 local connection;
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16 local params = module:get_option("sql");
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17 local table_prefix = module:get_option_string("wordpress_table_prefix", "wp_");
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18
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19 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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20
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21 local function test_connection()
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22 if not connection then return nil; end
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23 if connection:ping() then
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24 return true;
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25 else
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26 module:log("debug", "Database connection closed");
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27 connection = nil;
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28 end
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29 end
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30 local function connect()
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31 if not test_connection() then
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32 prosody.unlock_globals();
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33 local dbh, err = DBI.Connect(
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34 params.driver, params.database,
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35 params.username, params.password,
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36 params.host, params.port
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37 );
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38 prosody.lock_globals();
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39 if not dbh then
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40 module:log("debug", "Database connection failed: %s", tostring(err));
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41 return nil, err;
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42 end
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43 module:log("debug", "Successfully connected to database");
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44 dbh:autocommit(true); -- don't run in transaction
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45 connection = dbh;
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46 return connection;
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47 end
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48 end
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49
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50 do -- process options to get a db connection
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51 params = params or { driver = "SQLite3" };
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52
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53 if params.driver == "SQLite3" then
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54 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
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55 end
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56
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57 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
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58
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59 assert(connect());
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60 end
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61
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62 local function getsql(sql, ...)
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63 if params.driver == "PostgreSQL" then
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64 sql = sql:gsub("`", "\"");
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65 end
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66 if not test_connection() then connect(); end
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67 -- do prepared statement stuff
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68 local stmt, err = connection:prepare(sql);
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69 if not stmt and not test_connection() then error("connection failed"); end
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70 if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
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71 -- run query
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72 local ok, err = stmt:execute(...);
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73 if not ok and not test_connection() then error("connection failed"); end
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74 if not ok then return nil, err; end
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75
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76 return stmt;
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77 end
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78 local function setsql(sql, ...)
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79 local stmt, err = getsql(sql, ...);
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80 if not stmt then return stmt, err; end
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81 return stmt:affected();
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82 end
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83
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84 local function get_password(username)
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85 local stmt, err = getsql("SELECT `user_pass` FROM `"..table_prefix.."users` WHERE `user_login`=?", username);
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86 if stmt then
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87 for row in stmt:rows(true) do
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88 return row.user_pass;
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89 end
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90 end
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91 end
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92
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93
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94 local itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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95 local function hashEncode64(input, count)
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96 local output = "";
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97 local i, value = 0, 0;
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98
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99 while true do
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100 value = input:byte(i+1)
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101 i = i+1;
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102 local idx = value % 0x40 + 1;
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103 output = output .. itoa64:sub(idx, idx);
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104
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105 if i < count then
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106 value = value + input:byte(i+1) * 256;
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107 end
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108 local _ = value % (2^6);
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109 local idx = ((value - _) / (2^6)) % 0x40 + 1
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110 output = output .. itoa64:sub(idx, idx);
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111
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112 if i >= count then break; end
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113 i = i+1;
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114
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115 if i < count then
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116 value = value + input:byte(i+1) * 256 * 256;
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117 end
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118 local _ = value % (2^12);
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119 local idx = ((value - _) / (2^12)) % 0x40 + 1
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120 output = output .. itoa64:sub(idx, idx);
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121
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122 if i >= count then break; end
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123 i = i+1;
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124
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125 local _ = value % (2^18);
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126 local idx = ((value - _) / (2^18)) % 0x40 + 1
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127 output = output .. itoa64:sub(idx, idx);
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128
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129 if not(i < count) then break; end
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130 end
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131 return output;
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132 end
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133 local function hashCryptPrivate(password, genSalt)
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134 local output = "*";
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diff changeset
135 if not genSalt:match("^%$P%$") then return output; end
373
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136
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137 local count_log2 = itoa64:find(genSalt:sub(4,4)) - 1;
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138 if count_log2 < 7 or count_log2 > 30 then return output; end
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139
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140 local count = 2 ^ count_log2;
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141 local salt = genSalt:sub(5, 12);
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142
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143 if #salt ~= 8 then return output; end
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144
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145 local hash = md5(salt..password);
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146
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147 while true do
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148 hash = md5(hash..password);
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149 if not(count > 1) then break; end
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150 count = count-1;
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151 end
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152
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153 output = genSalt:sub(1, 12);
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154 output = output .. hashEncode64(hash, 16);
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155
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156 return output;
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157 end
377
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158 local function hashGensaltPrivate(input)
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159 local iteration_count_log2 = 6;
425
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160 local output = "$P$";
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161 local idx = math.min(iteration_count_log2 + 5, 30) + 1;
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162 output = output .. itoa64:sub(idx, idx);
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163 output = output .. hashEncode64(input, 6);
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164 return output;
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165 end
424
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166 local function wordpressCheckHash(password, hash)
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167 if #hash == 32 then return hash == md5(password, true); end
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168 return #hash == 34 and hashCryptPrivate(password, hash) == hash;
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169 end
424
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170 local function wordpressCreateHash(password)
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171 local random = uuid_gen():sub(-6);
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172 local salt = hashGensaltPrivate(random);
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173 local hash = hashCryptPrivate(password, salt);
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174 if #hash == 34 then return hash; end
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175 return md5(password, true);
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176 end
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177
373
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178
423
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diff changeset
179 provider = { name = "wordpress" };
373
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180
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181 function provider.test_password(username, password)
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182 local hash = get_password(username);
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183 return hash and wordpressCheckHash(password, hash);
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184 end
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185 function provider.user_exists(username)
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186 module:log("debug", "test user %s existence", username);
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187 return get_password(username) and true;
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188 end
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189
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190 function provider.get_password(username)
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191 return nil, "Getting password is not supported.";
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192 end
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193 function provider.set_password(username, password)
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194 local hash = wordpressCreateHash(password);
426
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195 local stmt, err = setsql("UPDATE `"..table_prefix.."users` SET `user_pass`=? WHERE `user_login`=?", hash, username);
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diff changeset
196 return stmt and true, err;
373
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197 end
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198 function provider.create_user(username, password)
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199 return nil, "Account creation/modification not supported.";
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200 end
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201
419
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diff changeset
202 local escapes = {
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203 [" "] = "\\20";
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204 ['"'] = "\\22";
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205 ["&"] = "\\26";
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206 ["'"] = "\\27";
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diff changeset
207 ["/"] = "\\2f";
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208 [":"] = "\\3a";
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209 ["<"] = "\\3c";
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210 [">"] = "\\3e";
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211 ["@"] = "\\40";
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diff changeset
212 ["\\"] = "\\5c";
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diff changeset
213 };
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diff changeset
214 local unescapes = {};
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diff changeset
215 for k,v in pairs(escapes) do unescapes[v] = k; end
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diff changeset
216 local function jid_escape(s) return s and (s:gsub(".", escapes)); end
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diff changeset
217 local function jid_unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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diff changeset
218
373
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219 function provider.get_sasl_handler()
419
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diff changeset
220 local sasl = {};
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221 function sasl:clean_clone() return provider.get_sasl_handler(); end
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diff changeset
222 function sasl:mechanisms() return { PLAIN = true; }; end
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diff changeset
223 function sasl:select(mechanism)
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diff changeset
224 if not self.selected and mechanism == "PLAIN" then
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diff changeset
225 self.selected = mechanism;
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diff changeset
226 return true;
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diff changeset
227 end
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228 end
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diff changeset
229 function sasl:process(message)
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diff changeset
230 if not message then return "failure", "malformed-request"; end
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diff changeset
231 local authorization, authentication, password = message:match("^([^%z]*)%z([^%z]+)%z([^%z]+)");
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diff changeset
232 if not authorization then return "failure", "malformed-request"; end
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diff changeset
233 authentication = saslprep(authentication);
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234 password = saslprep(password);
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diff changeset
235 if (not password) or (password == "") or (not authentication) or (authentication == "") then
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236 return "failure", "malformed-request", "Invalid username or password.";
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237 end
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diff changeset
238 local function test(authentication)
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diff changeset
239 local prepped = nodeprep(authentication);
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240 local normalized = jid_unescape(prepped);
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241 return normalized and provider.test_password(normalized, password) and prepped;
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242 end
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243 local username = test(authentication) or test(jid_escape(authentication));
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diff changeset
244 if username then
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diff changeset
245 self.username = username;
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diff changeset
246 return "success";
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diff changeset
247 end
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diff changeset
248 return "failure", "not-authorized", "Unable to authorize you with the authentication credentials you've sent.";
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249 end
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diff changeset
250 return sasl;
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251 end
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252
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253 module:add_item("auth-provider", provider);
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parents:
diff changeset
254