annotate mod_auth_phpbb3/mod_auth_phpbb3.lua @ 5255:001c8fdc91a4

mod_http_oauth2: Add support for the "openid" scope This "openid" scope is there to signal access to the userinfo endpoint, which is needed for OIDC support. We don't actually check this later because the userinfo endpoint only returns info embedded in the token itself, but in the future we may want to check this more carefully.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 17:06:35 +0100
parents 28d99ffa3c06
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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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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>
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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:
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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
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parents:
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148
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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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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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>
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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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parents:
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158
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
159 while true do
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160 hash = md5(hash..password);
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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:
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163 end
81c7b36e6cdd mod_auth_phpbb3: Initial commit.
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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.
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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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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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parents:
diff changeset
196 function provider.test_password(username, password)
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parents:
diff changeset
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);
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parents: 421
diff changeset
210 local stmt, err = setsql("UPDATE `phpbb_users` SET `user_password`=? WHERE `username_clean`=?", hash, username);
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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";
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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.
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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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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