annotate mod_auth_phpbb3/mod_auth_phpbb3.lua @ 1268:854a3933cfcd

mod_muc_log_http: URL-encode room names. This allows special characters in room names to work. Ideally this escaping shouldn’t be done in the user visible content, but the module’s template system doesn’t currently allow that.
author Waqas Hussain <waqas20@gmail.com>
date Sat, 04 Jan 2014 16:50:57 -0500
parents 881ec9919144
children 7dbde05b48a9
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1 -- phpbb3 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_password` FROM `phpbb_users` WHERE `username_clean`=?", 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 local function check_sessionids(username, session_id)
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91 -- TODO add session expiration and auto-login check
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92 local stmt, err = getsql("SELECT phpbb_sessions.session_id FROM phpbb_sessions INNER JOIN phpbb_users ON phpbb_users.user_id = phpbb_sessions.session_user_id WHERE phpbb_users.username_clean =?", username);
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93 if stmt then
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94 for row in stmt:rows(true) do
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95 -- if row.session_id == session_id then return true; end
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96
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97 -- workaround for possible LuaDBI bug
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98 -- The session_id returned by the sql statement has an additional zero at the end. But that is not in the database.
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99 if row.session_id == session_id or row.session_id == session_id.."0" then return true; end
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100 end
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101 end
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102 end
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103
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104
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105 local itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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106 local function hashEncode64(input, count)
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107 local output = "";
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108 local i, value = 0, 0;
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109
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110 while true do
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111 value = input:byte(i+1)
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112 i = i+1;
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113 local idx = value % 0x40 + 1;
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114 output = output .. itoa64:sub(idx, idx);
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115
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116 if i < count then
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117 value = value + input:byte(i+1) * 256;
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118 end
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119 local _ = value % (2^6);
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120 local idx = ((value - _) / (2^6)) % 0x40 + 1
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121 output = output .. itoa64:sub(idx, idx);
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122
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123 if i >= count then break; end
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124 i = i+1;
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125
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126 if i < count then
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127 value = value + input:byte(i+1) * 256 * 256;
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128 end
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
129 local _ = value % (2^12);
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
130 local idx = ((value - _) / (2^12)) % 0x40 + 1
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parents:
diff changeset
131 output = output .. itoa64:sub(idx, idx);
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parents:
diff changeset
132
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
133 if i >= count then break; end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
134 i = i+1;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
135
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
136 local _ = value % (2^18);
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
137 local idx = ((value - _) / (2^18)) % 0x40 + 1
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parents:
diff changeset
138 output = output .. itoa64:sub(idx, idx);
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parents:
diff changeset
139
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
140 if not(i < count) then break; end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
141 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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142 return output;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
143 end
377
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diff changeset
144 local function hashCryptPrivate(password, genSalt)
373
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parents:
diff changeset
145 local output = "*";
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
146 if not genSalt:match("^%$H%$") then return output; end
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parents:
diff changeset
147
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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diff changeset
148 local count_log2 = itoa64:find(genSalt:sub(4,4)) - 1;
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parents:
diff changeset
149 if count_log2 < 7 or count_log2 > 30 then return output; end
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parents:
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150
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
151 local count = 2 ^ count_log2;
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Waqas Hussain <waqas20@gmail.com>
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diff changeset
152 local salt = genSalt:sub(5, 12);
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Waqas Hussain <waqas20@gmail.com>
parents:
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153
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
154 if #salt ~= 8 then return output; end
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
155
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
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156 local hash = md5(salt..password);
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parents:
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157
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
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158 while true do
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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159 hash = md5(hash..password);
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
160 if not(count > 1) then break; end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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161 count = count-1;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
162 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
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163
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
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164 output = genSalt:sub(1, 12);
377
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diff changeset
165 output = output .. hashEncode64(hash, 16);
373
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
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166
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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167 return output;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
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168 end
377
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169 local function hashGensaltPrivate(input)
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170 local iteration_count_log2 = 6;
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171 local output = "$H$";
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172 local idx = math.min(iteration_count_log2 + 5, 30) + 1;
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173 output = output .. itoa64:sub(idx, idx);
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parents: 376
diff changeset
174 output = output .. hashEncode64(input, 6);
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parents: 376
diff changeset
175 return output;
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parents: 376
diff changeset
176 end
373
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parents:
diff changeset
177 local function phpbbCheckHash(password, hash)
421
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178 if #hash == 32 then return hash == md5(password, true); end -- legacy PHPBB2 hash
377
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179 return #hash == 34 and hashCryptPrivate(password, hash) == hash;
373
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parents:
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180 end
421
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181 local function phpbbCreateHash(password)
377
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182 local random = uuid_gen():sub(-6);
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183 local salt = hashGensaltPrivate(random);
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184 local hash = hashCryptPrivate(password, salt);
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185 if #hash == 34 then return hash; end
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186 return md5(password, true);
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parents: 376
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187 end
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parents: 376
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188
373
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parents:
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189
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881ec9919144 mod_auth_*: Use module:provides(), and don't explicitly specify provider.name.
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parents: 665
diff changeset
190 provider = {};
373
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parents:
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191
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
192 function provider.test_password(username, password)
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parents:
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193 local hash = get_password(username);
375
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194 return hash and phpbbCheckHash(password, hash);
373
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parents:
diff changeset
195 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
196 function provider.user_exists(username)
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parents:
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197 module:log("debug", "test user %s existence", username);
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parents:
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198 return get_password(username) and true;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
199 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
200
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
201 function provider.get_password(username)
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Waqas Hussain <waqas20@gmail.com>
parents:
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202 return nil, "Getting password is not supported.";
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
203 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
204 function provider.set_password(username, password)
421
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parents: 420
diff changeset
205 local hash = phpbbCreateHash(password);
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parents: 421
diff changeset
206 local stmt, err = setsql("UPDATE `phpbb_users` SET `user_password`=? WHERE `username_clean`=?", hash, username);
377
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diff changeset
207 return stmt and true, err;
373
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
208 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
209 function provider.create_user(username, password)
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
210 return nil, "Account creation/modification not supported.";
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
211 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
212
419
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parents: 377
diff changeset
213 local escapes = {
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214 [" "] = "\\20";
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parents: 377
diff changeset
215 ['"'] = "\\22";
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parents: 377
diff changeset
216 ["&"] = "\\26";
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parents: 377
diff changeset
217 ["'"] = "\\27";
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parents: 377
diff changeset
218 ["/"] = "\\2f";
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parents: 377
diff changeset
219 [":"] = "\\3a";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
220 ["<"] = "\\3c";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
221 [">"] = "\\3e";
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parents: 377
diff changeset
222 ["@"] = "\\40";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
223 ["\\"] = "\\5c";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
224 };
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
225 local unescapes = {};
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parents: 377
diff changeset
226 for k,v in pairs(escapes) do unescapes[v] = k; end
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parents: 377
diff changeset
227 local function jid_escape(s) return s and (s:gsub(".", escapes)); end
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parents: 377
diff changeset
228 local function jid_unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
229
373
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
230 function provider.get_sasl_handler()
419
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parents: 377
diff changeset
231 local sasl = {};
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parents: 377
diff changeset
232 function sasl:clean_clone() return provider.get_sasl_handler(); end
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parents: 377
diff changeset
233 function sasl:mechanisms() return { PLAIN = true; }; end
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parents: 377
diff changeset
234 function sasl:select(mechanism)
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parents: 377
diff changeset
235 if not self.selected and mechanism == "PLAIN" then
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parents: 377
diff changeset
236 self.selected = mechanism;
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parents: 377
diff changeset
237 return true;
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parents: 377
diff changeset
238 end
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
239 end
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parents: 377
diff changeset
240 function sasl:process(message)
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parents: 377
diff changeset
241 if not message then return "failure", "malformed-request"; end
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
242 local authorization, authentication, password = message:match("^([^%z]*)%z([^%z]+)%z([^%z]+)");
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parents: 377
diff changeset
243 if not authorization then return "failure", "malformed-request"; end
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parents: 377
diff changeset
244 authentication = saslprep(authentication);
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parents: 377
diff changeset
245 password = saslprep(password);
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parents: 377
diff changeset
246 if (not password) or (password == "") or (not authentication) or (authentication == "") then
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parents: 377
diff changeset
247 return "failure", "malformed-request", "Invalid username or password.";
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parents: 377
diff changeset
248 end
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
249 local function test(authentication)
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diff changeset
250 local prepped = nodeprep(authentication);
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parents: 377
diff changeset
251 local normalized = jid_unescape(prepped);
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parents: 377
diff changeset
252 return normalized and provider.test_password(normalized, password) and prepped;
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parents: 377
diff changeset
253 end
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parents: 377
diff changeset
254 local username = test(authentication) or test(jid_escape(authentication));
665
684cc57a49c1 mod_auth_phpbb3: Optionally allow using PHPBB3 session ID as password ( sql = { sessionid_as_password = true, ... } ).
Waqas Hussain <waqas20@gmail.com>
parents: 626
diff changeset
255 if not username and params.sessionid_as_password then
684cc57a49c1 mod_auth_phpbb3: Optionally allow using PHPBB3 session ID as password ( sql = { sessionid_as_password = true, ... } ).
Waqas Hussain <waqas20@gmail.com>
parents: 626
diff changeset
256 local function test(authentication)
684cc57a49c1 mod_auth_phpbb3: Optionally allow using PHPBB3 session ID as password ( sql = { sessionid_as_password = true, ... } ).
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parents: 626
diff changeset
257 local prepped = nodeprep(authentication);
684cc57a49c1 mod_auth_phpbb3: Optionally allow using PHPBB3 session ID as password ( sql = { sessionid_as_password = true, ... } ).
Waqas Hussain <waqas20@gmail.com>
parents: 626
diff changeset
258 local normalized = jid_unescape(prepped);
684cc57a49c1 mod_auth_phpbb3: Optionally allow using PHPBB3 session ID as password ( sql = { sessionid_as_password = true, ... } ).
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parents: 626
diff changeset
259 return normalized and check_sessionids(normalized, password) and prepped;
684cc57a49c1 mod_auth_phpbb3: Optionally allow using PHPBB3 session ID as password ( sql = { sessionid_as_password = true, ... } ).
Waqas Hussain <waqas20@gmail.com>
parents: 626
diff changeset
260 end
684cc57a49c1 mod_auth_phpbb3: Optionally allow using PHPBB3 session ID as password ( sql = { sessionid_as_password = true, ... } ).
Waqas Hussain <waqas20@gmail.com>
parents: 626
diff changeset
261 username = test(authentication) or test(jid_escape(authentication));
684cc57a49c1 mod_auth_phpbb3: Optionally allow using PHPBB3 session ID as password ( sql = { sessionid_as_password = true, ... } ).
Waqas Hussain <waqas20@gmail.com>
parents: 626
diff changeset
262 end
419
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
263 if username then
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
264 self.username = username;
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
265 return "success";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
266 end
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
267 return "failure", "not-authorized", "Unable to authorize you with the authentication credentials you've sent.";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
268 end
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
269 return sasl;
373
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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270 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
271
814
881ec9919144 mod_auth_*: Use module:provides(), and don't explicitly specify provider.name.
Waqas Hussain <waqas20@gmail.com>
parents: 665
diff changeset
272 module:provides("auth", provider);
373
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
273