1 /* Copyright (c) 2014, Google Inc. 2 * 3 * Permission to use, copy, modify, and/or distribute this software for any 4 * purpose with or without fee is hereby granted, provided that the above 5 * copyright notice and this permission notice appear in all copies. 6 * 7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 14 15 #ifndef OPENSSL_HEADER_POLY1305_H 16 #define OPENSSL_HEADER_POLY1305_H 17 18 #include <openssl/base.h> 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 25 typedef uint8_t poly1305_state[512]; 26 27 /* CRYPTO_poly1305_init sets up |state| so that it can be used to calculate an 28 * authentication tag with the one-time key |key|. Note that |key| is a 29 * one-time key and therefore there is no `reset' method because that would 30 * enable several messages to be authenticated with the same key. */ 31 OPENSSL_EXPORT void CRYPTO_poly1305_init(poly1305_state* state, 32 const uint8_t key[32]); 33 34 /* CRYPTO_poly1305_update processes |in_len| bytes from |in|. It can be called 35 * zero or more times after poly1305_init. */ 36 OPENSSL_EXPORT void CRYPTO_poly1305_update(poly1305_state* state, 37 const uint8_t* in, 38 size_t in_len); 39 40 /* CRYPTO_poly1305_finish completes the poly1305 calculation and writes a 16 41 * byte authentication tag to |mac|. The |mac| address must be 16-byte 42 * aligned. */ 43 OPENSSL_EXPORT void CRYPTO_poly1305_finish(poly1305_state* state, 44 uint8_t mac[16]); 45 46 47 #if defined(__cplusplus) 48 } /* extern C */ 49 #endif 50 51 #endif /* OPENSSL_HEADER_POLY1305_H */ 52