prosody
a65b56348034
util/sasl/scram.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/sasl/scram.lua @ 5839:a65b56348034

util.sasl.scram: Checking the GS2 header for valid start flag.
author Tobias Markmann <tm@ayena.de>
date Sun, 06 Feb 2011 13:20:17 +0100
parent 5837:574e91531994
child 5840:4b484e8feafc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
1 -- sasl.lua v0.4
3094
5f625411b463 util.sasl: 2009 -> 2010 in copyright header.
Tobias Markmann <tm@ayena.de>
parents: 2648
diff changeset
2 -- Copyright (C) 2008-2010 Tobias Markmann
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
3 --
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
4 -- All rights reserved.
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
5 --
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
6 -- Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
7 --
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
8 -- * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
9 -- * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
10 -- * Neither the name of Tobias Markmann nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
11 --
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
12 -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
13
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
14 local s_match = string.match;
2198
d18b4d22b8da Making interop with libpurple. (Thanks darkrain).
Tobias Markmann <tm@ayena.de>
parents: 2197
diff changeset
15 local type = type
d18b4d22b8da Making interop with libpurple. (Thanks darkrain).
Tobias Markmann <tm@ayena.de>
parents: 2197
diff changeset
16 local string = string
5828
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
17 local tostring = tostring;
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
18 local base64 = require "util.encodings".base64;
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
19 local hmac_sha1 = require "util.hmac".sha1;
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
20 local sha1 = require "util.hashes".sha1;
2196
614c839c30c5 Completed SCRAM-SHA-1 implementation to a ready-to-test state.
Tobias Markmann <tm@ayena.de>
parents: 2194
diff changeset
21 local generate_uuid = require "util.uuid".generate;
2199
08a6b91bfe7b SASLprep usernames and passwords.
Tobias Markmann <tm@ayena.de>
parents: 2198
diff changeset
22 local saslprep = require "util.encodings".stringprep.saslprep;
08a6b91bfe7b SASLprep usernames and passwords.
Tobias Markmann <tm@ayena.de>
parents: 2198
diff changeset
23 local log = require "util.logger".init("sasl");
2314
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
24 local t_concat = table.concat;
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
25 local char = string.char;
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
26 local byte = string.byte;
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
27
2206
Tobias Markmann <tm@ayena.de>
parents: 2205
diff changeset
28 module "scram"
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
29
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
30 --=========================
3374
ce52f1d5cb74 util.sasl.scram: Reference actual RFC instead of the draft.
Tobias Markmann <tm@ayena.de>
parents: 3206
diff changeset
31 --SASL SCRAM-SHA-1 according to RFC 5802
3097
9341ef1a3345 util.sasl.scram: Adding documentation on SCRAM authentication backend.
Tobias Markmann <tm@ayena.de>
parents: 3096
diff changeset
32
9341ef1a3345 util.sasl.scram: Adding documentation on SCRAM authentication backend.
Tobias Markmann <tm@ayena.de>
parents: 3096
diff changeset
33 --[[
9341ef1a3345 util.sasl.scram: Adding documentation on SCRAM authentication backend.
Tobias Markmann <tm@ayena.de>
parents: 3096
diff changeset
34 Supported Authentication Backends
9341ef1a3345 util.sasl.scram: Adding documentation on SCRAM authentication backend.
Tobias Markmann <tm@ayena.de>
parents: 3096
diff changeset
35
3122
579f17b9f948 util.sasl.*: Adjusting authentication provider names. All '-' replaced with '_'
Tobias Markmann <tm@ayena.de>
parents: 3118
diff changeset
36 scram_{MECH}:
579f17b9f948 util.sasl.*: Adjusting authentication provider names. All '-' replaced with '_'
Tobias Markmann <tm@ayena.de>
parents: 3118
diff changeset
37 -- MECH being a standard hash name (like those at IANA's hash registry) with '-' replaced with '_'
3097
9341ef1a3345 util.sasl.scram: Adding documentation on SCRAM authentication backend.
Tobias Markmann <tm@ayena.de>
parents: 3096
diff changeset
38 function(username, realm)
3205
2dcd826bbbc6 mod_auth_internal_hashed: Store StoredKey and ServerKey instead of salted hashed password.
Tobias Markmann <tm@ayena.de>
parents: 3196
diff changeset
39 return stored_key, server_key, iteration_count, salt, state;
3097
9341ef1a3345 util.sasl.scram: Adding documentation on SCRAM authentication backend.
Tobias Markmann <tm@ayena.de>
parents: 3096
diff changeset
40 end
5836
fa8cfe830fef util.sasl.scram: Adding reference to RFC 5929 'Channel Bindings for TLS'.
Tobias Markmann <tm@ayena.de>
parents: 5835
diff changeset
41
fa8cfe830fef util.sasl.scram: Adding reference to RFC 5929 'Channel Bindings for TLS'.
Tobias Markmann <tm@ayena.de>
parents: 5835
diff changeset
42 Supported Channel Binding Backends
fa8cfe830fef util.sasl.scram: Adding reference to RFC 5929 'Channel Bindings for TLS'.
Tobias Markmann <tm@ayena.de>
parents: 5835
diff changeset
43
fa8cfe830fef util.sasl.scram: Adding reference to RFC 5929 'Channel Bindings for TLS'.
Tobias Markmann <tm@ayena.de>
parents: 5835
diff changeset
44 'tls-unique' according to RFC 5929
3097
9341ef1a3345 util.sasl.scram: Adding documentation on SCRAM authentication backend.
Tobias Markmann <tm@ayena.de>
parents: 3096
diff changeset
45 ]]
9341ef1a3345 util.sasl.scram: Adding documentation on SCRAM authentication backend.
Tobias Markmann <tm@ayena.de>
parents: 3096
diff changeset
46
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
47 local default_i = 4096
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
48
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
49 local function bp( b )
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
50 local result = ""
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
51 for i=1, b:len() do
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
52 result = result.."\\"..b:byte(i)
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
53 end
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
54 return result
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
55 end
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
56
2314
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
57 local xor_map = {0;1;2;3;4;5;6;7;8;9;10;11;12;13;14;15;1;0;3;2;5;4;7;6;9;8;11;10;13;12;15;14;2;3;0;1;6;7;4;5;10;11;8;9;14;15;12;13;3;2;1;0;7;6;5;4;11;10;9;8;15;14;13;12;4;5;6;7;0;1;2;3;12;13;14;15;8;9;10;11;5;4;7;6;1;0;3;2;13;12;15;14;9;8;11;10;6;7;4;5;2;3;0;1;14;15;12;13;10;11;8;9;7;6;5;4;3;2;1;0;15;14;13;12;11;10;9;8;8;9;10;11;12;13;14;15;0;1;2;3;4;5;6;7;9;8;11;10;13;12;15;14;1;0;3;2;5;4;7;6;10;11;8;9;14;15;12;13;2;3;0;1;6;7;4;5;11;10;9;8;15;14;13;12;3;2;1;0;7;6;5;4;12;13;14;15;8;9;10;11;4;5;6;7;0;1;2;3;13;12;15;14;9;8;11;10;5;4;7;6;1;0;3;2;14;15;12;13;10;11;8;9;6;7;4;5;2;3;0;1;15;14;13;12;11;10;9;8;7;6;5;4;3;2;1;0;};
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
58
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
59 local result = {};
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
60 local function binaryXOR( a, b )
2314
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
61 for i=1, #a do
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
62 local x, y = byte(a, i), byte(b, i);
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
63 local lowx, lowy = x % 16, y % 16;
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
64 local hix, hiy = (x - lowx) / 16, (y - lowy) / 16;
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
65 local lowr, hir = xor_map[lowx * 16 + lowy + 1], xor_map[hix * 16 + hiy + 1];
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
66 local r = hir * 16 + lowr;
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
67 result[i] = char(r)
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
68 end
2314
c2e1bde4d84d Redo merge with Waqas' PBKDF2 optimizations.
Tobias Markmann <tm@ayena.de>
parents: 2290
diff changeset
69 return t_concat(result);
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
70 end
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
71
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
72 -- hash algorithm independent Hi(PBKDF2) implementation
3405
b1efe62c3c37 util.sasl.scram: Made function Hi public.
Waqas Hussain <waqas20@gmail.com>
parents: 3374
diff changeset
73 function Hi(hmac, str, salt, i)
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
74 local Ust = hmac(str, salt.."\0\0\0\1");
3540
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 3405
diff changeset
75 local res = Ust;
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
76 for n=1,i-1 do
2255
92e329e1cd99 Make some more variables to locals.
Tobias Markmann <tm@ayena.de>
parents: 2210
diff changeset
77 local Und = hmac(str, Ust)
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
78 res = binaryXOR(res, Und)
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
79 Ust = Und
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
80 end
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
81 return res
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
82 end
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
83
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
84 local function validate_username(username)
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
85 -- check for forbidden char sequences
2198
d18b4d22b8da Making interop with libpurple. (Thanks darkrain).
Tobias Markmann <tm@ayena.de>
parents: 2197
diff changeset
86 for eq in username:gmatch("=(.?.?)") do
d18b4d22b8da Making interop with libpurple. (Thanks darkrain).
Tobias Markmann <tm@ayena.de>
parents: 2197
diff changeset
87 if eq ~= "2D" and eq ~= "3D" then
3540
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 3405
diff changeset
88 return false
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 3405
diff changeset
89 end
2198
d18b4d22b8da Making interop with libpurple. (Thanks darkrain).
Tobias Markmann <tm@ayena.de>
parents: 2197
diff changeset
90 end
d18b4d22b8da Making interop with libpurple. (Thanks darkrain).
Tobias Markmann <tm@ayena.de>
parents: 2197
diff changeset
91
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
92 -- replace =2D with , and =3D with =
2265
7fe644057dc2 util.sasl.scram: Making =2D and =3D substitution actually work.
Tobias Markmann <tm@ayena.de>
parents: 2255
diff changeset
93 username = username:gsub("=2D", ",");
7fe644057dc2 util.sasl.scram: Making =2D and =3D substitution actually work.
Tobias Markmann <tm@ayena.de>
parents: 2255
diff changeset
94 username = username:gsub("=3D", "=");
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
95
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
96 -- apply SASLprep
2199
08a6b91bfe7b SASLprep usernames and passwords.
Tobias Markmann <tm@ayena.de>
parents: 2198
diff changeset
97 username = saslprep(username);
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
98 return username;
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
99 end
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
100
3155
c713fa2ba80c SASL: Minor cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 3154
diff changeset
101 local function hashprep(hashname)
c713fa2ba80c SASL: Minor cleanup.
Waqas Hussain <waqas20@gmail.com>
parents: 3154
diff changeset
102 return hashname:lower():gsub("-", "_");
3122
579f17b9f948 util.sasl.*: Adjusting authentication provider names. All '-' replaced with '_'
Tobias Markmann <tm@ayena.de>
parents: 3118
diff changeset
103 end
579f17b9f948 util.sasl.*: Adjusting authentication provider names. All '-' replaced with '_'
Tobias Markmann <tm@ayena.de>
parents: 3118
diff changeset
104
3205
2dcd826bbbc6 mod_auth_internal_hashed: Store StoredKey and ServerKey instead of salted hashed password.
Tobias Markmann <tm@ayena.de>
parents: 3196
diff changeset
105 function getAuthenticationDatabaseSHA1(password, salt, iteration_count)
3118
95ddd75ed3c5 util.sasl.scram: Fixing logic error in argument checking.
Tobias Markmann <tm@ayena.de>
parents: 3107
diff changeset
106 if type(password) ~= "string" or type(salt) ~= "string" or type(iteration_count) ~= "number" then
3104
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
107 return false, "inappropriate argument types"
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
108 end
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
109 if iteration_count < 4096 then
3194
b308450740b0 util.sasl.scram: Fixed a log level.
Waqas Hussain <waqas20@gmail.com>
parents: 3123
diff changeset
110 log("warn", "Iteration count < 4096 which is the suggested minimum according to RFC 5802.")
3104
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
111 end
3205
2dcd826bbbc6 mod_auth_internal_hashed: Store StoredKey and ServerKey instead of salted hashed password.
Tobias Markmann <tm@ayena.de>
parents: 3196
diff changeset
112 local salted_password = Hi(hmac_sha1, password, salt, iteration_count);
2dcd826bbbc6 mod_auth_internal_hashed: Store StoredKey and ServerKey instead of salted hashed password.
Tobias Markmann <tm@ayena.de>
parents: 3196
diff changeset
113 local stored_key = sha1(hmac_sha1(salted_password, "Client Key"))
2dcd826bbbc6 mod_auth_internal_hashed: Store StoredKey and ServerKey instead of salted hashed password.
Tobias Markmann <tm@ayena.de>
parents: 3196
diff changeset
114 local server_key = hmac_sha1(salted_password, "Server Key");
2dcd826bbbc6 mod_auth_internal_hashed: Store StoredKey and ServerKey instead of salted hashed password.
Tobias Markmann <tm@ayena.de>
parents: 3196
diff changeset
115 return true, stored_key, server_key
3104
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
116 end
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
117
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
118 local function scram_gen(hash_name, H_f, HMAC_f)
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
119 local function scram_hash(self, message)
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
120 if not self.state then self["state"] = {} end
5833
b1fa865ee6b2 util.sasl.scram: Use self.profile.cb for detection whether channel binding is supported or not.
Tobias Markmann <tm@ayena.de>
parents: 5829
diff changeset
121 local support_channel_binding = false;
b1fa865ee6b2 util.sasl.scram: Use self.profile.cb for detection whether channel binding is supported or not.
Tobias Markmann <tm@ayena.de>
parents: 5829
diff changeset
122 if self.profile.cb then support_channel_binding = true; end
b1fa865ee6b2 util.sasl.scram: Use self.profile.cb for detection whether channel binding is supported or not.
Tobias Markmann <tm@ayena.de>
parents: 5829
diff changeset
123
3106
f4341cac3ae1 util.sasl.scram: Fixing issue #177.
Tobias Markmann <tm@ayena.de>
parents: 3104
diff changeset
124 if type(message) ~= "string" or #message == 0 then return "failure", "malformed-request" end
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
125 if not self.state.name then
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
126 -- we are processing client_first_message
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
127 local client_first_message = message;
5828
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
128 log("debug", client_first_message);
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
129 -- TODO: fail if authzid is provided, since we don't support them yet
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
130 self.state["client_first_message"] = client_first_message;
5828
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
131 self.state["gs2_cbind_flag"], self.state["gs2_cbind_name"], self.state["authzid"], self.state["name"], self.state["clientnonce"]
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
132 = client_first_message:match("^(%a)=?([%a%-]*),(.*),n=(.*),r=([^,]*).*");
3100
6731dff05c99 util.sasl.scram: Parsing client-first-message in a more strict way. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3099
diff changeset
133
5839
a65b56348034 util.sasl.scram: Checking the GS2 header for valid start flag.
Tobias Markmann <tm@ayena.de>
parents: 5837
diff changeset
134 -- check for invalid gs2_flag_type start
a65b56348034 util.sasl.scram: Checking the GS2 header for valid start flag.
Tobias Markmann <tm@ayena.de>
parents: 5837
diff changeset
135 local gs2_flag_type == string.sub(self.state.gs2_cbind_flag, 0, 1)
a65b56348034 util.sasl.scram: Checking the GS2 header for valid start flag.
Tobias Markmann <tm@ayena.de>
parents: 5837
diff changeset
136 if gs2_flag_type ~= "y" and gs2_flag_type ~= "n" and gs2_flag_type ~= "p" then
a65b56348034 util.sasl.scram: Checking the GS2 header for valid start flag.
Tobias Markmann <tm@ayena.de>
parents: 5837
diff changeset
137 return "failure", "malformed-request", "The GS2 header has to start with 'y', 'n', or 'p'."
a65b56348034 util.sasl.scram: Checking the GS2 header for valid start flag.
Tobias Markmann <tm@ayena.de>
parents: 5837
diff changeset
138 end
a65b56348034 util.sasl.scram: Checking the GS2 header for valid start flag.
Tobias Markmann <tm@ayena.de>
parents: 5837
diff changeset
139
5828
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
140 if support_channel_binding then
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
141 if string.sub(self.state.gs2_cbind_flag, 0, 1) == "y" then
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
142 return "failure", "malformed-request";
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
143 end
5829
40c16475194e Check whether we support the proposed channel binding type.
Tobias Markmann <tm@ayena.de>
parents: 5828
diff changeset
144
40c16475194e Check whether we support the proposed channel binding type.
Tobias Markmann <tm@ayena.de>
parents: 5828
diff changeset
145 -- check whether we support the proposed channel binding type
40c16475194e Check whether we support the proposed channel binding type.
Tobias Markmann <tm@ayena.de>
parents: 5828
diff changeset
146 if not self.profile.cb[self.state.gs2_cbind_name] then
40c16475194e Check whether we support the proposed channel binding type.
Tobias Markmann <tm@ayena.de>
parents: 5828
diff changeset
147 return "failure", "malformed-request", "Proposed channel binding type isn't supported.";
40c16475194e Check whether we support the proposed channel binding type.
Tobias Markmann <tm@ayena.de>
parents: 5828
diff changeset
148 end
5828
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
149 else
5839
a65b56348034 util.sasl.scram: Checking the GS2 header for valid start flag.
Tobias Markmann <tm@ayena.de>
parents: 5837
diff changeset
150 -- we don't support channelbinding,
5828
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
151 if self.state.gs2_cbind_flag ~= "n" and self.state.gs2_cbind_flag ~= "y" then
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
152 return "failure", "malformed-request";
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
153 end
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
154 end
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
155
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
156 if not self.state.name or not self.state.clientnonce then
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
157 return "failure", "malformed-request", "Channel binding isn't support at this time.";
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
158 end
2199
08a6b91bfe7b SASLprep usernames and passwords.
Tobias Markmann <tm@ayena.de>
parents: 2198
diff changeset
159
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
160 self.state.name = validate_username(self.state.name);
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
161 if not self.state.name then
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
162 log("debug", "Username violates either SASLprep or contains forbidden character sequences.")
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
163 return "failure", "malformed-request", "Invalid username.";
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
164 end
2196
614c839c30c5 Completed SCRAM-SHA-1 implementation to a ready-to-test state.
Tobias Markmann <tm@ayena.de>
parents: 2194
diff changeset
165
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
166 self.state["servernonce"] = generate_uuid();
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
167
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
168 -- retreive credentials
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
169 if self.profile.plain then
3981
2b0b8fe68df2 util.sasl.*, mod_auth_*, mod_saslauth: Pass SASL handler as first parameter to SASL profile callbacks.
Waqas Hussain <waqas20@gmail.com>
parents: 3540
diff changeset
170 local password, state = self.profile.plain(self, self.state.name, self.realm)
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
171 if state == nil then return "failure", "not-authorized"
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
172 elseif state == false then return "failure", "account-disabled" end
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
173
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
174 password = saslprep(password);
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
175 if not password then
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
176 log("debug", "Password violates SASLprep.");
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
177 return "failure", "not-authorized", "Invalid password."
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
178 end
3104
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
179
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
180 self.state.salt = generate_uuid();
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
181 self.state.iteration_count = default_i;
3104
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
182
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
183 local succ = false;
3206
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
184 succ, self.state.stored_key, self.state.server_key = getAuthenticationDatabaseSHA1(password, self.state.salt, default_i, self.state.iteration_count);
3104
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
185 if not succ then
3206
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
186 log("error", "Generating authentication database failed. Reason: %s", self.state.stored_key);
3104
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
187 return "failure", "temporary-auth-failure";
32150b4a8603 util.sasl.scram: Providing an API function to generate a salted password for the SCRAM-SHA-1 mechanism.
Tobias Markmann <tm@ayena.de>
parents: 3103
diff changeset
188 end
3122
579f17b9f948 util.sasl.*: Adjusting authentication provider names. All '-' replaced with '_'
Tobias Markmann <tm@ayena.de>
parents: 3118
diff changeset
189 elseif self.profile["scram_"..hashprep(hash_name)] then
3981
2b0b8fe68df2 util.sasl.*, mod_auth_*, mod_saslauth: Pass SASL handler as first parameter to SASL profile callbacks.
Waqas Hussain <waqas20@gmail.com>
parents: 3540
diff changeset
190 local stored_key, server_key, iteration_count, salt, state = self.profile["scram_"..hashprep(hash_name)](self, self.state.name, self.realm);
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
191 if state == nil then return "failure", "not-authorized"
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
192 elseif state == false then return "failure", "account-disabled" end
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
193
3206
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
194 self.state.stored_key = stored_key;
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
195 self.state.server_key = server_key;
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
196 self.state.iteration_count = iteration_count;
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
197 self.state.salt = salt
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
198 end
2196
614c839c30c5 Completed SCRAM-SHA-1 implementation to a ready-to-test state.
Tobias Markmann <tm@ayena.de>
parents: 2194
diff changeset
199
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
200 local server_first_message = "r="..self.state.clientnonce..self.state.servernonce..",s="..base64.encode(self.state.salt)..",i="..self.state.iteration_count;
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
201 self.state["server_first_message"] = server_first_message;
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
202 return "challenge", server_first_message
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
203 else
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
204 -- we are processing client_final_message
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
205 local client_final_message = message;
5828
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
206 log("debug", "client_final_message: %s", client_final_message);
3102
5cd408e36359 util.sasl.scram: Parsing client-final-message in a more strict way. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3101
diff changeset
207 self.state["channelbinding"], self.state["nonce"], self.state["proof"] = client_final_message:match("^c=(.*),r=(.*),.*p=(.*)");
5835
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
208
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
209 if self.state.gs2_cbind_name then
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
210 local client_gs2_header = base64.decode(self.state.channelbinding)
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
211 local our_client_gs2_header = "p="..self.state.gs2_cbind_name..","..self.state["authzid"]..","..self.profile.cb[self.state.gs2_cbind_name](self);
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
212
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
213 if client_gs2_header ~= our_client_gs2_header then
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
214 return "failure", "malformed-request", "Invalid channel binding value.";
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
215 end
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
216 else
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
217 if not self.state.proof or not self.state.nonce or not self.state.channelbinding then
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
218 return "failure", "malformed-request", "Missing an attribute(p, r or c) in SASL message.";
a5f4de8c0b40 util.sasl.scram: Validate channel binding data of client final message.
Tobias Markmann <tm@ayena.de>
parents: 5833
diff changeset
219 end
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
220 end
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
221
3101
9e4439378cf8 util.sasl.scram: Fix in nonce check of client-final-message.
Tobias Markmann <tm@ayena.de>
parents: 3100
diff changeset
222 if self.state.nonce ~= self.state.clientnonce..self.state.servernonce then
9e4439378cf8 util.sasl.scram: Fix in nonce check of client-final-message.
Tobias Markmann <tm@ayena.de>
parents: 3100
diff changeset
223 return "failure", "malformed-request", "Wrong nonce in client-final-message.";
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
224 end
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
225
3206
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
226 local ServerKey = self.state.server_key;
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
227 local StoredKey = self.state.stored_key;
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
228
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
229 local AuthMessage = "n=" .. s_match(self.state.client_first_message,"n=(.+)") .. "," .. self.state.server_first_message .. "," .. s_match(client_final_message, "(.+),p=.+")
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
230 local ClientSignature = HMAC_f(StoredKey, AuthMessage)
3206
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
231 local ClientKey = binaryXOR(ClientSignature, base64.decode(self.state.proof))
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
232 local ServerSignature = HMAC_f(ServerKey, AuthMessage)
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
233
3206
ff1d3f751da1 util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents: 3205
diff changeset
234 if StoredKey == H_f(ClientKey) then
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
235 local server_final_message = "v="..base64.encode(ServerSignature);
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
236 self["username"] = self.state.name;
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
237 return "success", server_final_message;
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
238 else
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
239 return "failure", "not-authorized", "The response provided by the client doesn't match the one we calculated.";
2199
08a6b91bfe7b SASLprep usernames and passwords.
Tobias Markmann <tm@ayena.de>
parents: 2198
diff changeset
240 end
2196
614c839c30c5 Completed SCRAM-SHA-1 implementation to a ready-to-test state.
Tobias Markmann <tm@ayena.de>
parents: 2194
diff changeset
241 end
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
242 end
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
243 return scram_hash;
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
244 end
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
245
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
246 function init(registerMechanism)
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
247 local function registerSCRAMMechanism(hash_name, hash, hmac_hash)
3122
579f17b9f948 util.sasl.*: Adjusting authentication provider names. All '-' replaced with '_'
Tobias Markmann <tm@ayena.de>
parents: 3118
diff changeset
248 registerMechanism("SCRAM-"..hash_name, {"plain", "scram_"..(hashprep(hash_name))}, scram_gen(hash_name:lower(), hash, hmac_hash));
5828
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
249
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
250 -- register channel binding equivalent
24de22c01f8d Adding some code for channel binding advertising.
Tobias Markmann <tm@ayena.de>
parents: 3981
diff changeset
251 registerMechanism("SCRAM-"..hash_name.."-PLUS", {"plain", "scram_"..(hashprep(hash_name))}, scram_gen(hash_name:lower(), hash, hmac_hash));
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
252 end
3099
2c4d06e7e3d3 util.sasl.scram: Check nonce in client final message. Check channel binding flag in client first message. Adding some TODOs on more strict parsing. (thanks Marc Santamaria)
Tobias Markmann <tm@ayena.de>
parents: 3098
diff changeset
253
3096
e69282792686 util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
Tobias Markmann <tm@ayena.de>
parents: 3094
diff changeset
254 registerSCRAMMechanism("SHA-1", sha1, hmac_sha1);
2194
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
255 end
41d42d253a1d Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
256
3107
6d576a66ca63 util.sasl.scram: Adjusting authentication backend name to conform with the style already used by the plain module.
Tobias Markmann <tm@ayena.de>
parents: 3106
diff changeset
257 return _M;