2013-09-13 19:59:45 +00:00
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/*
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* ZeroTier One - Global Peer to Peer Ethernet
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2014-02-16 20:40:22 +00:00
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* Copyright (C) 2011-2014 ZeroTier Networks LLC
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2013-09-13 19:59:45 +00:00
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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2013-12-07 00:49:20 +00:00
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#ifndef ZT_POLY1305_HPP
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#define ZT_POLY1305_HPP
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2013-09-13 19:59:45 +00:00
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namespace ZeroTier {
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2013-09-14 17:51:08 +00:00
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#define ZT_POLY1305_KEY_LEN 32
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#define ZT_POLY1305_MAC_LEN 16
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2013-09-13 19:59:45 +00:00
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/**
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* Poly1305 one-time authentication code
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2013-09-14 17:51:08 +00:00
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*
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* This takes a one-time-use 32-byte key and generates a 16-byte message
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* authentication code. The key must never be re-used for a different
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* message. Normally this is done by taking a base key and mangling it
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* using a nonce and possibly other data, as in Packet.
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2013-09-13 19:59:45 +00:00
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*/
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class Poly1305
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{
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public:
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/**
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* Compute a one-time authentication code
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*
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* @param auth Buffer to receive code -- MUST be 16 bytes in length
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* @param data Data to authenticate
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* @param len Length of data to authenticate in bytes
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* @param key 32-byte one-time use key to authenticate data (must not be reused)
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*/
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2013-09-15 14:41:52 +00:00
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static void compute(void *auth,const void *data,unsigned int len,const void *key)
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2013-09-13 19:59:45 +00:00
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throw();
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};
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} // namespace ZeroTier
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#endif
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