author | Florian Zeitz <florob@babelmonkeys.de> |
Sun, 28 Apr 2013 02:28:42 +0200 | |
changeset 5538 | 62089c9c142d |
parent 5537 | 15464633d8fb |
child 5776 | bd0ff8ae98a8 |
permissions | -rw-r--r-- |
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-- sasl.lua v0.4 |
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-- Copyright (C) 2008-2010 Tobias Markmann |
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-- |
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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)
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-- All rights reserved. |
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-- |
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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)
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-- Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: |
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-- |
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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:
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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:
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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:
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-- * 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. |
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-- |
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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)
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-- 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. |
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Initial commit of SCRAM SASL mechanism.
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|
41d42d253a1d
Initial commit of SCRAM SASL mechanism.
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local s_match = string.match; |
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local type = type |
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local string = string |
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local base64 = require "util.encodings".base64; |
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util.hmac, util.hashes: Implement HMAC functions in C, and move to util.hashes
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local hmac_sha1 = require "util.hashes".hmac_sha1; |
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local sha1 = require "util.hashes".sha1; |
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util.hashes, util.sasl.scram: Implement SCRAM-SHA1's Hi in C
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local Hi = require "util.hashes".scram_Hi_sha1; |
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Completed SCRAM-SHA-1 implementation to a ready-to-test state.
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local generate_uuid = require "util.uuid".generate; |
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local saslprep = require "util.encodings".stringprep.saslprep; |
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util.sasl.{plain,scram,digest-md5}: nodeprep username before passing to callbacks, so callbacks don't have to.
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local nodeprep = require "util.encodings".stringprep.nodeprep; |
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local log = require "util.logger".init("sasl"); |
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local t_concat = table.concat; |
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local char = string.char; |
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local byte = string.byte; |
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|
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util.sasl.*: Add 'sasl.' prefix to module names
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module "sasl.scram" |
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|
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--========================= |
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--SASL SCRAM-SHA-1 according to RFC 5802 |
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|
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--[[ |
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Supported Authentication Backends |
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|
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scram_{MECH}: |
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-- MECH being a standard hash name (like those at IANA's hash registry) with '-' replaced with '_' |
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function(username, realm) |
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return stored_key, server_key, iteration_count, salt, state; |
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end |
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]] |
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local default_i = 4096 |
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|
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local function bp( b ) |
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local result = "" |
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for i=1, b:len() do |
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result = result.."\\"..b:byte(i) |
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end |
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return result |
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end |
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|
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Redo merge with Waqas' PBKDF2 optimizations.
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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;}; |
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|
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local result = {}; |
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local function binaryXOR( a, b ) |
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for i=1, #a do |
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local x, y = byte(a, i), byte(b, i); |
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local lowx, lowy = x % 16, y % 16; |
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local hix, hiy = (x - lowx) / 16, (y - lowy) / 16; |
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local lowr, hir = xor_map[lowx * 16 + lowy + 1], xor_map[hix * 16 + hiy + 1]; |
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local r = hir * 16 + lowr; |
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result[i] = char(r) |
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65 |
end |
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return t_concat(result); |
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end |
41d42d253a1d
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parents:
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|
5301
6279caf921f1
util.sasl.{plain,scram,digest-md5}: nodeprep username before passing to callbacks, so callbacks don't have to.
Waqas Hussain <waqas20@gmail.com>
parents:
4368
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69 |
local function validate_username(username, _nodeprep) |
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-- check for forbidden char sequences |
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Making interop with libpurple. (Thanks darkrain).
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for eq in username:gmatch("=(.?.?)") do |
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util.sasl.scram: Fix bug in validate_username function. (Thanks Florob)
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if eq ~= "2C" and eq ~= "3D" then |
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Monster whitespace commit (beware the whitespace monster).
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return false |
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
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74 |
end |
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Making interop with libpurple. (Thanks darkrain).
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75 |
end |
d18b4d22b8da
Making interop with libpurple. (Thanks darkrain).
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parents:
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|
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util.sasl.scram: Fix bug in validate_username function. (Thanks Florob)
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-- replace =2C with , and =3D with = |
edd7b0610c2c
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username = username:gsub("=2C", ","); |
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username = username:gsub("=3D", "="); |
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|
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-- apply SASLprep |
2199
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username = saslprep(username); |
5301
6279caf921f1
util.sasl.{plain,scram,digest-md5}: nodeprep username before passing to callbacks, so callbacks don't have to.
Waqas Hussain <waqas20@gmail.com>
parents:
4368
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83 |
|
6279caf921f1
util.sasl.{plain,scram,digest-md5}: nodeprep username before passing to callbacks, so callbacks don't have to.
Waqas Hussain <waqas20@gmail.com>
parents:
4368
diff
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84 |
if username and _nodeprep ~= false then |
6279caf921f1
util.sasl.{plain,scram,digest-md5}: nodeprep username before passing to callbacks, so callbacks don't have to.
Waqas Hussain <waqas20@gmail.com>
parents:
4368
diff
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85 |
username = (_nodeprep or nodeprep)(username); |
6279caf921f1
util.sasl.{plain,scram,digest-md5}: nodeprep username before passing to callbacks, so callbacks don't have to.
Waqas Hussain <waqas20@gmail.com>
parents:
4368
diff
changeset
|
86 |
end |
6279caf921f1
util.sasl.{plain,scram,digest-md5}: nodeprep username before passing to callbacks, so callbacks don't have to.
Waqas Hussain <waqas20@gmail.com>
parents:
4368
diff
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87 |
|
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util.sasl.scram: Return proper error and don't touch datastores on empty username.
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return username and #username>0 and username; |
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89 |
end |
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|
3155 | 91 |
local function hashprep(hashname) |
92 |
return hashname:lower():gsub("-", "_"); |
|
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93 |
end |
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util.sasl.*: Adjusting authentication provider names. All '-' replaced with '_'
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parents:
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94 |
|
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mod_auth_internal_hashed: Store StoredKey and ServerKey instead of salted hashed password.
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|
95 |
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
|
96 |
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
|
97 |
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
|
98 |
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
|
99 |
if iteration_count < 4096 then |
3194
b308450740b0
util.sasl.scram: Fixed a log level.
Waqas Hussain <waqas20@gmail.com>
parents:
3123
diff
changeset
|
100 |
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
|
101 |
end |
5538
62089c9c142d
util.hashes, util.sasl.scram: Implement SCRAM-SHA1's Hi in C
Florian Zeitz <florob@babelmonkeys.de>
parents:
5537
diff
changeset
|
102 |
local salted_password = Hi(password, salt, iteration_count); |
3205
2dcd826bbbc6
mod_auth_internal_hashed: Store StoredKey and ServerKey instead of salted hashed password.
Tobias Markmann <tm@ayena.de>
parents:
3196
diff
changeset
|
103 |
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
|
104 |
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
|
105 |
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
|
106 |
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
|
107 |
|
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
|
108 |
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
|
109 |
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
|
110 |
if not self.state then self["state"] = {} end |
2194
41d42d253a1d
Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff
changeset
|
111 |
|
3106
f4341cac3ae1
util.sasl.scram: Fixing issue #177.
Tobias Markmann <tm@ayena.de>
parents:
3104
diff
changeset
|
112 |
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
|
113 |
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
|
114 |
-- 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
|
115 |
local client_first_message = 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
|
116 |
|
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
|
117 |
-- 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
|
118 |
self.state["client_first_message"] = client_first_message; |
3103
87cf90ca8923
util.sasl.scram: Split up long line.
Tobias Markmann <tm@ayena.de>
parents:
3102
diff
changeset
|
119 |
self.state["gs2_cbind_flag"], self.state["authzid"], self.state["name"], self.state["clientnonce"] |
87cf90ca8923
util.sasl.scram: Split up long line.
Tobias Markmann <tm@ayena.de>
parents:
3102
diff
changeset
|
120 |
= client_first_message:match("^(%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
|
121 |
|
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
|
122 |
-- we don't do any channel binding yet |
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
|
123 |
if self.state.gs2_cbind_flag ~= "n" and self.state.gs2_cbind_flag ~= "y" then |
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
|
124 |
return "failure", "malformed-request"; |
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
|
125 |
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
|
126 |
|
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
|
127 |
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
|
128 |
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
|
129 |
end |
2199
08a6b91bfe7b
SASLprep usernames and passwords.
Tobias Markmann <tm@ayena.de>
parents:
2198
diff
changeset
|
130 |
|
5301
6279caf921f1
util.sasl.{plain,scram,digest-md5}: nodeprep username before passing to callbacks, so callbacks don't have to.
Waqas Hussain <waqas20@gmail.com>
parents:
4368
diff
changeset
|
131 |
self.state.name = validate_username(self.state.name, self.profile.nodeprep); |
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
|
132 |
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
|
133 |
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
|
134 |
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
|
135 |
end |
2196
614c839c30c5
Completed SCRAM-SHA-1 implementation to a ready-to-test state.
Tobias Markmann <tm@ayena.de>
parents:
2194
diff
changeset
|
136 |
|
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
|
137 |
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
|
138 |
|
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
|
139 |
-- 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
|
140 |
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
|
141 |
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
|
142 |
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
|
143 |
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
|
144 |
|
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
|
145 |
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
|
146 |
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
|
147 |
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
|
148 |
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
|
149 |
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
|
150 |
|
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
|
151 |
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
|
152 |
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
|
153 |
|
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
|
154 |
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
|
155 |
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
|
156 |
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
|
157 |
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
|
158 |
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
|
159 |
end |
3122
579f17b9f948
util.sasl.*: Adjusting authentication provider names. All '-' replaced with '_'
Tobias Markmann <tm@ayena.de>
parents:
3118
diff
changeset
|
160 |
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
|
161 |
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
|
162 |
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
|
163 |
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
|
164 |
|
3206
ff1d3f751da1
util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents:
3205
diff
changeset
|
165 |
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
|
166 |
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
|
167 |
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
|
168 |
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
|
169 |
end |
2196
614c839c30c5
Completed SCRAM-SHA-1 implementation to a ready-to-test state.
Tobias Markmann <tm@ayena.de>
parents:
2194
diff
changeset
|
170 |
|
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 |
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
|
172 |
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
|
173 |
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
|
174 |
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
|
175 |
-- 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
|
176 |
local client_final_message = 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
|
177 |
|
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
|
178 |
self.state["channelbinding"], self.state["nonce"], self.state["proof"] = client_final_message:match("^c=(.*),r=(.*),.*p=(.*)"); |
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
|
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 |
if not self.state.proof or not self.state.nonce or not self.state.channelbinding 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:
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181 |
return "failure", "malformed-request", "Missing an attribute(p, r or c) in SASL message."; |
e69282792686
util.sasl: Abstracting out the hash function used since SCRAM is independent of it. Adding scram-{mech} authentication backend support.
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parents:
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182 |
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
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183 |
|
3101
9e4439378cf8
util.sasl.scram: Fix in nonce check of client-final-message.
Tobias Markmann <tm@ayena.de>
parents:
3100
diff
changeset
|
184 |
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:
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diff
changeset
|
185 |
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:
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diff
changeset
|
186 |
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
|
187 |
|
3206
ff1d3f751da1
util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents:
3205
diff
changeset
|
188 |
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
|
189 |
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
|
190 |
|
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 |
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
|
192 |
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
|
193 |
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
|
194 |
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
|
195 |
|
3206
ff1d3f751da1
util.sasl.scram: Authenticate clients by calculated StoredKey instead of ClientProof.
Tobias Markmann <tm@ayena.de>
parents:
3205
diff
changeset
|
196 |
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
|
197 |
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
|
198 |
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
|
199 |
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
|
200 |
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
|
201 |
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
|
202 |
end |
2196
614c839c30c5
Completed SCRAM-SHA-1 implementation to a ready-to-test state.
Tobias Markmann <tm@ayena.de>
parents:
2194
diff
changeset
|
203 |
end |
2194
41d42d253a1d
Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff
changeset
|
204 |
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
|
205 |
return scram_hash; |
2194
41d42d253a1d
Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff
changeset
|
206 |
end |
41d42d253a1d
Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff
changeset
|
207 |
|
41d42d253a1d
Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff
changeset
|
208 |
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
|
209 |
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
|
210 |
registerMechanism("SCRAM-"..hash_name, {"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
|
211 |
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
|
212 |
|
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
|
213 |
registerSCRAMMechanism("SHA-1", sha1, hmac_sha1); |
2194
41d42d253a1d
Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff
changeset
|
214 |
end |
41d42d253a1d
Initial commit of SCRAM SASL mechanism.
Tobias Markmann <tm@ayena.de>
parents:
diff
changeset
|
215 |
|
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
|
216 |
return _M; |