prosody-modules
fc6a618bfe4e
mod_auth_phpbb3/mod_auth_phpbb3.lua

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mod_auth_phpbb3/mod_auth_phpbb3.lua @ 4984:fc6a618bfe4e

mod_compat_roles/README: Fix yaml syntax in metadata block
author Kim Alvefur <zash@zash.se>
date Thu, 11 Aug 2022 20:04:13 +0200
parent 2168:28d99ffa3c06
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
373
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Waqas Hussain <waqas20@gmail.com>
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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 local have_bcrypt, bcrypt = pcall(require, "bcrypt"); -- available from luarocks
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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
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18 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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19
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20 local function test_connection()
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21 if not connection then return nil; end
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22 if connection:ping() then
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23 return true;
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24 else
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25 module:log("debug", "Database connection closed");
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26 connection = nil;
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27 end
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28 end
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29 local function connect()
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30 if not test_connection() then
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31 prosody.unlock_globals();
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32 local dbh, err = DBI.Connect(
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33 params.driver, params.database,
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34 params.username, params.password,
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35 params.host, params.port
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36 );
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37 prosody.lock_globals();
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38 if not dbh then
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39 module:log("debug", "Database connection failed: %s", tostring(err));
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40 return nil, err;
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41 end
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42 module:log("debug", "Successfully connected to database");
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43 dbh:autocommit(true); -- don't run in transaction
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44 connection = dbh;
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45 return connection;
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46 end
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47 end
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48
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49 do -- process options to get a db connection
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50 params = params or { driver = "SQLite3" };
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51
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52 if params.driver == "SQLite3" then
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53 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
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54 end
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55
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56 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
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57
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58 assert(connect());
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59 end
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60
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61 local function getsql(sql, ...)
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62 if params.driver == "PostgreSQL" then
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63 sql = sql:gsub("`", "\"");
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64 end
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65 if not test_connection() then connect(); end
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66 -- do prepared statement stuff
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67 local stmt, err = connection:prepare(sql);
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68 if not stmt and not test_connection() then error("connection failed"); end
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69 if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
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70 -- run query
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71 local ok, err = stmt:execute(...);
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72 if not ok and not test_connection() then error("connection failed"); end
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73 if not ok then return nil, err; end
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74
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75 return stmt;
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76 end
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77 local function setsql(sql, ...)
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78 local stmt, err = getsql(sql, ...);
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79 if not stmt then return stmt, err; end
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80 return stmt:affected();
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81 end
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82
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83 local function get_password(username)
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84 local stmt, err = getsql("SELECT `user_password` FROM `phpbb_users` WHERE `username_clean`=?", username);
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85 if stmt then
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86 for row in stmt:rows(true) do
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87 return row.user_password;
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88 end
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89 end
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90 end
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91 local function check_sessionids(username, session_id)
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92 -- TODO add session expiration and auto-login check
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93 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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94 if stmt then
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95 for row in stmt:rows(true) do
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96 -- if row.session_id == session_id then return true; end
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97
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98 -- workaround for possible LuaDBI bug
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99 -- 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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100 if row.session_id == session_id or row.session_id == session_id.."0" then return true; end
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101 end
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102 end
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103 end
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104
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105
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106 local itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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107 local function hashEncode64(input, count)
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108 local output = "";
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109 local i, value = 0, 0;
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110
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111 while true do
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112 value = input:byte(i+1)
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113 i = i+1;
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114 local idx = value % 0x40 + 1;
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115 output = output .. itoa64:sub(idx, idx);
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116
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117 if i < count then
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118 value = value + input:byte(i+1) * 256;
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119 end
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120 local _ = value % (2^6);
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121 local idx = ((value - _) / (2^6)) % 0x40 + 1
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122 output = output .. itoa64:sub(idx, idx);
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123
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124 if i >= count then break; end
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125 i = i+1;
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126
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127 if i < count then
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parents:
diff changeset
128 value = value + input:byte(i+1) * 256 * 256;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
129 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
130 local _ = value % (2^12);
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
131 local idx = ((value - _) / (2^12)) % 0x40 + 1
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
132 output = output .. itoa64:sub(idx, idx);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
133
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
134 if i >= count then break; end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
135 i = i+1;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
136
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
137 local _ = value % (2^18);
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
138 local idx = ((value - _) / (2^18)) % 0x40 + 1
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
139 output = output .. itoa64:sub(idx, idx);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
140
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
141 if not(i < count) then break; end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
142 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
143 return output;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
144 end
377
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diff changeset
145 local function hashCryptPrivate(password, genSalt)
373
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parents:
diff changeset
146 local output = "*";
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
147 if not genSalt:match("^%$H%$") then return output; end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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148
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
149 local count_log2 = itoa64:find(genSalt:sub(4,4)) - 1;
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parents:
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150 if count_log2 < 7 or count_log2 > 30 then return output; end
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Waqas Hussain <waqas20@gmail.com>
parents:
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151
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
152 local count = 2 ^ count_log2;
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
153 local salt = genSalt:sub(5, 12);
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Waqas Hussain <waqas20@gmail.com>
parents:
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154
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
155 if #salt ~= 8 then return output; end
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Waqas Hussain <waqas20@gmail.com>
parents:
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156
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Waqas Hussain <waqas20@gmail.com>
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157 local hash = md5(salt..password);
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Waqas Hussain <waqas20@gmail.com>
parents:
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158
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
159 while true do
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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160 hash = md5(hash..password);
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
161 if not(count > 1) then break; end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
162 count = count-1;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
163 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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164
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Waqas Hussain <waqas20@gmail.com>
parents:
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165 output = genSalt:sub(1, 12);
377
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166 output = output .. hashEncode64(hash, 16);
373
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parents:
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167
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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168 return output;
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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169 end
377
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diff changeset
170 local function hashGensaltPrivate(input)
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171 local iteration_count_log2 = 6;
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172 local output = "$H$";
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173 local idx = math.min(iteration_count_log2 + 5, 30) + 1;
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174 output = output .. itoa64:sub(idx, idx);
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parents: 376
diff changeset
175 output = output .. hashEncode64(input, 6);
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parents: 376
diff changeset
176 return output;
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parents: 376
diff changeset
177 end
373
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
178 local function phpbbCheckHash(password, hash)
421
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parents: 420
diff changeset
179 if #hash == 32 then return hash == md5(password, true); end -- legacy PHPBB2 hash
2168
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parents: 1343
diff changeset
180 if #hash == 34 then return hashCryptPrivate(password, hash) == hash; end
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parents: 1343
diff changeset
181 if #hash == 60 and have_bcrypt then return bcrypt.verify(password, hash); end
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parents: 1343
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182 module:log("error", "Unsupported hash: %s", hash);
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parents: 1343
diff changeset
183 return false;
373
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parents:
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184 end
421
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parents: 420
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185 local function phpbbCreateHash(password)
377
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186 local random = uuid_gen():sub(-6);
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187 local salt = hashGensaltPrivate(random);
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188 local hash = hashCryptPrivate(password, salt);
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parents: 376
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189 if #hash == 34 then return hash; end
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parents: 376
diff changeset
190 return md5(password, true);
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parents: 376
diff changeset
191 end
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parents: 376
diff changeset
192
373
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parents:
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193
814
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parents: 665
diff changeset
194 provider = {};
373
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parents:
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195
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
196 function provider.test_password(username, password)
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parents:
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197 local hash = get_password(username);
375
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parents: 374
diff changeset
198 return hash and phpbbCheckHash(password, hash);
373
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parents:
diff changeset
199 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
200 function provider.user_exists(username)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
201 module:log("debug", "test user %s existence", username);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
202 return get_password(username) and true;
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
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
205 function provider.get_password(username)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
206 return nil, "Getting password is not supported.";
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
207 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
208 function provider.set_password(username, password)
421
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parents: 420
diff changeset
209 local hash = phpbbCreateHash(password);
626
f19f723571d9 mod_auth_phpbb3: Match the username_clean column instead of the username column when updating password.
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parents: 421
diff changeset
210 local stmt, err = setsql("UPDATE `phpbb_users` SET `user_password`=? WHERE `username_clean`=?", hash, username);
377
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diff changeset
211 return stmt and true, err;
373
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
212 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
213 function provider.create_user(username, password)
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
214 return nil, "Account creation/modification not supported.";
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
215 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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parents:
diff changeset
216
419
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parents: 377
diff changeset
217 local escapes = {
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parents: 377
diff changeset
218 [" "] = "\\20";
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parents: 377
diff changeset
219 ['"'] = "\\22";
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parents: 377
diff changeset
220 ["&"] = "\\26";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
221 ["'"] = "\\27";
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parents: 377
diff changeset
222 ["/"] = "\\2f";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
223 [":"] = "\\3a";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
224 ["<"] = "\\3c";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
225 [">"] = "\\3e";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
226 ["@"] = "\\40";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
227 ["\\"] = "\\5c";
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
228 };
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
Waqas Hussain <waqas20@gmail.com>
parents: 377
diff changeset
229 local unescapes = {};
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parents: 377
diff changeset
230 for k,v in pairs(escapes) do unescapes[v] = k; end
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parents: 377
diff changeset
231 local function jid_escape(s) return s and (s:gsub(".", escapes)); end
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parents: 377
diff changeset
232 local function jid_unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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parents: 377
diff changeset
233
373
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
234 function provider.get_sasl_handler()
419
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parents: 377
diff changeset
235 local sasl = {};
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parents: 377
diff changeset
236 function sasl:clean_clone() return provider.get_sasl_handler(); end
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parents: 377
diff changeset
237 function sasl:mechanisms() return { PLAIN = true; }; end
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parents: 377
diff changeset
238 function sasl:select(mechanism)
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parents: 377
diff changeset
239 if not self.selected and mechanism == "PLAIN" then
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parents: 377
diff changeset
240 self.selected = mechanism;
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parents: 377
diff changeset
241 return true;
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parents: 377
diff changeset
242 end
2a2b70e1a998 mod_auth_phpbb3: Apply stringprep, and try automatic JID escaping to derive username.
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parents: 377
diff changeset
243 end
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parents: 377
diff changeset
244 function sasl:process(message)
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parents: 377
diff changeset
245 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
246 local authorization, authentication, password = message:match("^([^%z]*)%z([^%z]+)%z([^%z]+)");
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parents: 377
diff changeset
247 if not authorization then return "failure", "malformed-request"; end
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parents: 377
diff changeset
248 authentication = saslprep(authentication);
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parents: 377
diff changeset
249 password = saslprep(password);
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parents: 377
diff changeset
250 if (not password) or (password == "") or (not authentication) or (authentication == "") then
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parents: 377
diff changeset
251 return "failure", "malformed-request", "Invalid username or password.";
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parents: 377
diff changeset
252 end
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parents: 377
diff changeset
253 local function test(authentication)
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parents: 377
diff changeset
254 local prepped = nodeprep(authentication);
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255 local normalized = jid_unescape(prepped);
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256 return normalized and provider.test_password(normalized, password) and prepped;
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257 end
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258 local username = test(authentication) or test(jid_escape(authentication));
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259 if not username and params.sessionid_as_password then
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260 local function test(authentication)
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261 local prepped = nodeprep(authentication);
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262 local normalized = jid_unescape(prepped);
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263 return normalized and check_sessionids(normalized, password) and prepped;
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264 end
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265 username = test(authentication) or test(jid_escape(authentication));
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266 end
419
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267 if username then
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268 self.username = username;
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269 return "success";
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270 end
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271 return "failure", "not-authorized", "Unable to authorize you with the authentication credentials you've sent.";
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272 end
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273 return sasl;
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274 end
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275
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276 module:provides("auth", provider);
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277