mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-09-04 13:52:52 +02:00
43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
|
|
*
|
|
* (c) ZeroTier, Inc.
|
|
* https://www.zerotier.com/
|
|
*/
|
|
|
|
#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
|