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util/sasl/anonymous.lua @ 10973:39991e40d1dc
util.dbuffer: dynamic string buffer
Similar to util.ringbuffer (and shares almost identical API). Differences:
- size limit is optional and dynamic
- does not allocate a fixed buffer of max_size bytes
- focus on simply storing references to existing string objects where possible,
avoiding unnecessary allocations
- references are still stored in a ring buffer to enable use as a fast FIFO
Optional second parameter to new() provides the number of ring buffer segments. On
Lua 5.2 on my laptop, a segment is ~19 bytes. If the ring buffer fills up, the next
write will compact all strings into a single item.
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 26 Jun 2020 16:41:31 +0100 |
parent | 8874:d6eb910a204d |
child | 12940:2aebd9bf02fc |
rev | line source |
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2193 | 1 -- sasl.lua v0.4 |
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2 -- Copyright (C) 2008-2010 Tobias Markmann |
2193 | 3 -- |
4 -- All rights reserved. | |
5 -- | |
6 -- Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: | |
7 -- | |
8 -- * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. | |
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. | |
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. | |
11 -- | |
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. | |
13 | |
14 | |
8874 | 15 local generate_random_id = require "util.id".medium; |
2193 | 16 |
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17 local _ENV = nil; |
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18 -- luacheck: std none |
2193 | 19 |
20 --========================= | |
21 --SASL ANONYMOUS according to RFC 4505 | |
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22 |
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23 --[[ |
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24 Supported Authentication Backends |
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25 |
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26 anonymous: |
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27 function(username, realm) |
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28 return true; --for normal usage just return true; if you don't like the supplied username you can return false. |
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29 end |
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30 ]] |
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31 |
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32 local function anonymous(self, message) -- luacheck: ignore 212/message |
2193 | 33 local username; |
34 repeat | |
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35 username = generate_random_id():lower(); |
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36 until self.profile.anonymous(self, username, self.realm); |
3155 | 37 self.username = username; |
2193 | 38 return "success" |
39 end | |
40 | |
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41 local function init(registerMechanism) |
2193 | 42 registerMechanism("ANONYMOUS", {"anonymous"}, anonymous); |
43 end | |
44 | |
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45 return { |
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46 init = init; |
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47 } |