aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/mod_auth_internal_hashed.lua
blob: 50e0e052d35b7a66f3aa6ed5579b0831c1cbd8ae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
-- Copyright (C) 2010 Jeff Mitchell
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local datamanager = require "util.datamanager";
local log = require "util.logger".init("usermanager");
local type = type;
local error = error;
local ipairs = ipairs;
local hashes = require "util.hashes";
local jid_bare = require "util.jid".bare;
local getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
local config = require "core.configmanager";
local usermanager = require "core.usermanager";
local generate_uuid = require "util.uuid".generate;
local new_sasl = require "util.sasl".new;
local nodeprep = require "util.encodings".stringprep.nodeprep;
local hosts = hosts;

local prosody = _G.prosody;

local is_cyrus = usermanager.is_cyrus;

-- Default; can be set per-user
local iteration_count = 4096;

function new_hashpass_provider(host)
	local provider = { name = "internal_hashed" };
	log("debug", "initializing hashpass authentication provider for host '%s'", host);

	function provider.test_password(username, password)
		if is_cyrus(host) then return nil, "Legacy auth not supported with Cyrus SASL."; end
		local credentials = datamanager.load(username, host, "accounts") or {};
	
		if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
			if credentials.password ~= password then
				return nil, "Auth failed. Provided password is incorrect.";
			end

			if provider.set_password(username, credentials.password) == nil then
				return nil, "Auth failed. Could not set hashed password from plaintext.";
			else
				return true;
			end
		end

		if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
			return nil, "Auth failed. Stored salt and iteration count information is not complete.";
		end
		
		local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
		local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
		local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
		
		if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key_hex then
			return true;
		else
			return nil, "Auth failed. Invalid username, password, or password hash information.";
		end
	end

	function provider.set_password(username, password)
		if is_cyrus(host) then return nil, "Passwords unavailable for Cyrus SASL."; end
		local account = datamanager.load(username, host, "accounts");
		if account then
			if account.iteration_count == nil then
				account.iteration_count = iteration_count;
			end

			if account.salt == nil then
				account.salt = generate_uuid();
			end

			local valid, binpass = saltedPasswordSHA1(password, account.salt, account.iteration_count);
			local hexpass = binpass:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
			account.hashpass = hexpass;

			account.password = nil;
			return datamanager.store(username, host, "accounts", account);
		end
		return nil, "Account not available.";
	end

	function provider.user_exists(username)
		if is_cyrus(host) then return true; end
		local account = datamanager.load(username, host, "accounts");
		if not account then
			log("debug", "account not found for username '%s' at host '%s'", username, module.host);
			return nil, "Auth failed. Invalid username";
		end
		if (account.hashpass == nil or string.len(account.hashpass) == 0) and (account.password == nil or string.len(account.password) == 0) then
			log("debug", "account password not set or zero-length for username '%s' at host '%s'", username, module.host);
			return nil, "Auth failed. Password invalid.";
		end
		return true;
	end

	function provider.create_user(username, password)
		if is_cyrus(host) then return nil, "Account creation/modification not available with Cyrus SASL."; end
		local salt = generate_uuid();
		local valid, stored_key, server_key = saltedPasswordSHA1(password, salt, iteration_count);
		local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
		local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
		return datamanager.store(username, host, "accounts", {stored_key = stored_key_hex, server_key = server_key_hex, salt = salt, iteration_count = iteration_count});
	end

	function provider.get_sasl_handler()
		local realm = module:get_option("sasl_realm") or module.host;
		local testpass_authentication_profile = {
			plain_test = function(username, password, realm)
				local prepped_username = nodeprep(username);
				if not prepped_username then
					log("debug", "NODEprep failed on username: %s", username);
					return "", nil;
				end
				return usermanager.test_password(prepped_username, password, realm), true;
			end,
			scram_sha_1 = function(username, realm)
				local credentials = datamanager.load(username, host, "accounts") or {};
				if credentials.password then
					usermanager.set_password(username, credentials.password);
					credentials = datamanager.load(username, host, "accounts") or {};
				end
				local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
				stored_key = stored_key and stored_key:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
				server_key = server_key and server_key:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
				return stored_key, server_key, iteration_count, salt, true;
			end
		};
		return new_sasl(realm, testpass_authentication_profile);
	end

	function provider.is_admin(jid)
		local admins = config.get(host, "core", "admins");
		if admins ~= config.get("*", "core", "admins") and type(admins) == "table" then
			jid = jid_bare(jid);
			for _,admin in ipairs(admins) do
				if admin == jid then return true; end
			end
		elseif admins then
			log("error", "Option 'admins' for host '%s' is not a table", host);
		end
		return is_admin(jid); -- Test whether it's a global admin instead
	end
	return provider;
end

module:add_item("auth-provider", new_hashpass_provider(module.host));