mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-19 04:57:53 +00:00
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
/*
|
|
* Copyright (c)2019 ZeroTier, Inc.
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file in the project's root directory.
|
|
*
|
|
* Change Date: 2023-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2.0 of the Apache License.
|
|
*/
|
|
/****/
|
|
|
|
#ifndef ZT_POLY1305_HPP
|
|
#define ZT_POLY1305_HPP
|
|
|
|
namespace ZeroTier {
|
|
|
|
#define ZT_POLY1305_KEY_LEN 32
|
|
#define ZT_POLY1305_MAC_LEN 16
|
|
|
|
/**
|
|
* Poly1305 one-time authentication code
|
|
*
|
|
* This takes a one-time-use 32-byte key and generates a 16-byte message
|
|
* authentication code. The key must never be re-used for a different
|
|
* message.
|
|
*
|
|
* In Packet this is done by using the first 32 bytes of the stream cipher
|
|
* keystream as a one-time-use key. These 32 bytes are then discarded and
|
|
* the packet is encrypted with the next N bytes.
|
|
*/
|
|
class Poly1305
|
|
{
|
|
public:
|
|
/**
|
|
* Compute a one-time authentication code
|
|
*
|
|
* @param auth Buffer to receive code -- MUST be 16 bytes in length
|
|
* @param data Data to authenticate
|
|
* @param len Length of data to authenticate in bytes
|
|
* @param key 32-byte one-time use key to authenticate data (must not be reused)
|
|
*/
|
|
static void compute(void *auth,const void *data,unsigned int len,const void *key);
|
|
};
|
|
|
|
} // namespace ZeroTier
|
|
|
|
#endif
|