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1 /* | |
2 * poly1305.h - header file for Poly1305 implementation. | |
3 * | |
4 * This Source Code Form is subject to the terms of the Mozilla Public | |
5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
7 | |
8 #ifndef FREEBL_POLY1305_H_ | |
9 #define FREEBL_POLY1305_H_ | |
10 | |
11 typedef unsigned char poly1305_state[512]; | |
12 | |
13 /* Poly1305Init sets up |state| so that it can be used to calculate an | |
14 * authentication tag with the one-time key |key|. Note that |key| is a | |
15 * one-time key and therefore there is no `reset' method because that would | |
16 * enable several messages to be authenticated with the same key. */ | |
17 extern void Poly1305Init(poly1305_state* state, | |
18 const unsigned char key[32]); | |
19 | |
20 /* Poly1305Update processes |in_len| bytes from |in|. It can be called zero or | |
21 * more times after poly1305_init. */ | |
22 extern void Poly1305Update(poly1305_state* state, | |
23 const unsigned char *in, | |
24 size_t inLen); | |
25 | |
26 /* Poly1305Finish completes the poly1305 calculation and writes a 16 byte | |
27 * authentication tag to |mac|. */ | |
28 extern void Poly1305Finish(poly1305_state* state, | |
29 unsigned char mac[16]); | |
30 | |
31 #endif /* FREEBL_POLY1305_H_ */ | |
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