annotate mod_auth_sql/mod_auth_sql.lua @ 455:52f2188ec47d

mod_default_vcard: Sets initial vCard from data enterd on registration
author Kim Alvefur <zash@zash.se>
date Sat, 15 Oct 2011 13:43:37 +0200
parents 4e0d36941ba1
children bbea8081c865
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1 -- Simple SQL Authentication module for Prosody IM
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2 -- Copyright (C) 2011 Tomasz Sterna <tomek@xiaoka.com>
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3 -- Copyright (C) 2011 Waqas Hussain <waqas20@gmail.com>
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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 DBI = require "DBI"
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10 local crypt = require "crypt";
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11
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12 local connection;
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13 local params = module:get_option("sql");
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14 local host = module.host;
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15 local realm = module:get_option_string("realm", host);
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16 local mitm_mode = module:get_option_boolean("mitm_mode");
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17
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18 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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19 local datamanager = require "util.datamanager";
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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
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79 local function get_password(username)
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80 local stmt, err = getsql("SELECT `password` FROM `users` WHERE `email`=?", username .. "@" .. realm);
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81 if stmt then
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82 for row in stmt:rows(true) do
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83 return row.password;
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84 end
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85 end
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86 end
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87
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88 provider = { name = "sql" };
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89
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90 function provider.test_password(username, password)
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91 local local_data = datamanager.load(username, realm, "accounts") or {};
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92 if data.password == password then return true end
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93 local dirty;
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94 local hash = data.crypted_password;
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95 if not hash then
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96 hash = get_password(username);
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97 if hash then
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98 data.crypted_password = hash;
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99 dirty = true;
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100 else
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101 return false
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102 end
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103 end
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104 local ok = password and crypt(password, hash) == password;
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105 if ok and mitm_mode then
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106 local_data.password = password;
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107 dirty = true
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108 end
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109 if dirty then
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110 datamanager.store(username, realm, "accounts", local_data);
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111 end
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112 return ok
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113 end
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114 function provider.get_password(username)
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115 return nil, "Getting password is not supported.";
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116 end
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117 function provider.set_password(username, password)
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118 return nil, "Setting password is not supported.";
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119 end
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120 function provider.user_exists(username)
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121 return datamanager.load(username, realm, "accounts") or get_password(username) and true;
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122 end
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123 function provider.create_user(username, password)
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124 return nil, "Account creation/modification not supported.";
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125 end
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126 function provider.get_sasl_handler()
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127 local profile = {
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128 plain_test = function(sasl, username, password, realm)
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129 local prepped_username = nodeprep(username);
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130 if not prepped_username then
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131 module:log("debug", "NODEprep failed on username: %s", username);
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132 return nil;
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133 end
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134 return provider.test_password(prepped_username, password);
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135 end
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136 };
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137 return new_sasl(host, profile);
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138 end
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139
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140 module:add_item("auth-provider", provider);