prosody-modules
e83284d4d5c2
mod_auth_wordpress/mod_auth_wordpress.lua

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mod_auth_wordpress/mod_auth_wordpress.lua @ 4432:e83284d4d5c2

mod_auth_ccert/README: Add setting to ensure Prosdy asks for client certificate This used to be the default for all services, but since it triggers annoying popups in web browsers it was inverted in Prosody and only s2s enables it, so it needs to be explicitly enabled for c2s again. See trunk 115b5e32d960 Thanks debacle
author Kim Alvefur <zash@zash.se>
date Sat, 06 Feb 2021 21:34:25 +0100
parent 1343:7dbde05b48a9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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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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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135 if not genSalt:match("^%$P%$") then return output; end
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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
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158 local function hashGensaltPrivate(input)
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159 local iteration_count_log2 = 6;
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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
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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
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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
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178
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179 provider = {};
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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);
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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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196 return stmt and true, err;
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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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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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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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212 ["\\"] = "\\5c";
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diff changeset
213 };
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diff changeset
214 local unescapes = {};
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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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217 local function jid_unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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218
373
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219 function provider.get_sasl_handler()
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220 local sasl = {};
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221 function sasl:clean_clone() return provider.get_sasl_handler(); end
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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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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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233 authentication = saslprep(authentication);
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234 password = saslprep(password);
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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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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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244 if username then
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diff changeset
245 self.username = username;
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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:provides("auth", provider);
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254