prosody-modules
1c9a3454eb43
mod_auth_sql/mod_auth_sql.lua

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mod_auth_sql/mod_auth_sql.lua @ 847:1c9a3454eb43

mod_webpresence: Don't calculate the same hash four times.
author Waqas Hussain <waqas20@gmail.com>
date Sat, 13 Oct 2012 03:31:26 +0500
parent 843:cdc67f4efde2
child 902:490cb9161c81
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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
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11 local connection;
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12 local params = module:get_option("auth_sql", module:get_option("sql"));
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13
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14 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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15
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16 local function test_connection()
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17 if not connection then return nil; end
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18 if connection:ping() then
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19 return true;
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20 else
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21 module:log("debug", "Database connection closed");
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22 connection = nil;
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23 end
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24 end
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25 local function connect()
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26 if not test_connection() then
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27 prosody.unlock_globals();
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28 local dbh, err = DBI.Connect(
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29 params.driver, params.database,
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30 params.username, params.password,
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31 params.host, params.port
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32 );
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33 prosody.lock_globals();
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34 if not dbh then
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35 module:log("debug", "Database connection failed: %s", tostring(err));
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36 return nil, err;
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37 end
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38 module:log("debug", "Successfully connected to database");
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39 dbh:autocommit(true); -- don't run in transaction
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40 connection = dbh;
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41 return connection;
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42 end
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43 end
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44
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45 do -- process options to get a db connection
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46 params = params or { driver = "SQLite3" };
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47
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48 if params.driver == "SQLite3" then
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49 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
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50 end
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51
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52 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
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53
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54 assert(connect());
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55 end
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56
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57 local function getsql(sql, ...)
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58 if params.driver == "PostgreSQL" then
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59 sql = sql:gsub("`", "\"");
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60 end
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61 if not test_connection() then connect(); end
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62 -- do prepared statement stuff
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63 local stmt, err = connection:prepare(sql);
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64 if not stmt and not test_connection() then error("connection failed"); end
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65 if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
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66 -- run query
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67 local ok, err = stmt:execute(...);
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68 if not ok and not test_connection() then error("connection failed"); end
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69 if not ok then return nil, err; end
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70
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71 return stmt;
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72 end
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73
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74 local function get_password(username)
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75 local stmt, err = getsql("SELECT `password` FROM `authreg` WHERE `username`=? AND `realm`=?", username, module.host);
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76 if stmt then
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77 for row in stmt:rows(true) do
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78 return row.password;
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79 end
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80 end
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81 end
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82
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83
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84 provider = {};
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85
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86 function provider.test_password(username, password)
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87 return password and get_password(username) == password;
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88 end
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89 function provider.get_password(username)
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90 return get_password(username);
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91 end
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92 function provider.set_password(username, password)
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93 return nil, "Setting password is not supported.";
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94 end
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95 function provider.user_exists(username)
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96 return get_password(username) and true;
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97 end
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98 function provider.create_user(username, password)
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99 return nil, "Account creation/modification not supported.";
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100 end
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101 function provider.get_sasl_handler()
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102 local profile = {
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103 plain = function(sasl, username, realm)
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104 local prepped_username = nodeprep(username);
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105 if not prepped_username then
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106 module:log("debug", "NODEprep failed on username: %s", username);
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107 return "", nil;
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108 end
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109 local password = get_password(prepped_username);
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110 if not password then return "", nil; end
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111 return password, true;
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112 end
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113 };
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114 return new_sasl(module.host, profile);
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115 end
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116
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117 function provider.users()
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118 local stmt, err = getsql("SELECT `username` FROM `authreg` WHERE `realm`=?", module.host);
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119 if stmt then
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120 local next, state = stmt:rows(true)
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121 return function()
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122 for row in next, state do
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123 return row.username;
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124 end
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125 end
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126 end
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127 return stmt, err;
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128 end
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129
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130
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131 module:provides("auth", provider);