prosody
c8ad387aab1c
util/sasl/plain.lua

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util/sasl/plain.lua @ 7331:c8ad387aab1c

mod_presence, mod_roster: Move responsibility for sending presence on roster removal to mod_presence
author Kim Alvefur <zash@zash.se>
date Mon, 04 Apr 2016 17:15:10 +0200
parent 6777:5de6b93d0190
child 8095:57192cf193c7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- sasl.lua v0.4
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2 -- Copyright (C) 2008-2010 Tobias Markmann
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3 --
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4 -- All rights reserved.
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5 --
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6 -- 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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7 --
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8 -- * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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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.
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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.
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11 --
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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.
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13
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14 local s_match = string.match;
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15 local saslprep = require "util.encodings".stringprep.saslprep;
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16 local nodeprep = require "util.encodings".stringprep.nodeprep;
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17 local log = require "util.logger".init("sasl");
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18
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19 local _ENV = nil;
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20
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21 -- ================================
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22 -- SASL PLAIN according to RFC 4616
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23
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24 --[[
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25 Supported Authentication Backends
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26
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27 plain:
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28 function(username, realm)
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29 return password, state;
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30 end
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31
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32 plain_test:
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33 function(username, password, realm)
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34 return true or false, state;
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35 end
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36 ]]
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37
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38 local function plain(self, message)
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39 if not message then
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40 return "failure", "malformed-request";
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41 end
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42
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43 local authorization, authentication, password = s_match(message, "^([^%z]*)%z([^%z]+)%z([^%z]+)");
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44
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45 if not authorization then
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46 return "failure", "malformed-request";
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47 end
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48
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49 -- SASLprep password and authentication
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50 authentication = saslprep(authentication);
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51 password = saslprep(password);
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52
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53 if (not password) or (password == "") or (not authentication) or (authentication == "") then
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54 log("debug", "Username or password violates SASLprep.");
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55 return "failure", "malformed-request", "Invalid username or password.";
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56 end
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57
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58 local _nodeprep = self.profile.nodeprep;
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59 if _nodeprep ~= false then
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60 authentication = (_nodeprep or nodeprep)(authentication);
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61 if not authentication or authentication == "" then
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62 return "failure", "malformed-request", "Invalid username or password."
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63 end
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64 end
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65
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66 local correct, state = false, false;
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67 if self.profile.plain then
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68 local correct_password;
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69 correct_password, state = self.profile.plain(self, authentication, self.realm);
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70 correct = (correct_password == password);
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71 elseif self.profile.plain_test then
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72 correct, state = self.profile.plain_test(self, authentication, password, self.realm);
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73 end
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74
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75 self.username = authentication
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76 if state == false then
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77 return "failure", "account-disabled";
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78 elseif state == nil or not correct then
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79 return "failure", "not-authorized", "Unable to authorize you with the authentication credentials you've sent.";
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80 end
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81
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82 return "success";
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83 end
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84
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85 local function init(registerMechanism)
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86 registerMechanism("PLAIN", {"plain", "plain_test"}, plain);
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87 end
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88
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89 return {
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90 init = init;
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91 }