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- /* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
- #ifndef OPENSSL_HEADER_POLY1305_H
- #define OPENSSL_HEADER_POLY1305_H
- #include <openssl/base.h>
- #ifdef __cplusplus
- extern "C" {
- #endif
- typedef uint8_t poly1305_state[512];
- // CRYPTO_poly1305_init sets up |state| so that it can be used to calculate an
- // authentication tag with the one-time key |key|. Note that |key| is a
- // one-time key and therefore there is no `reset' method because that would
- // enable several messages to be authenticated with the same key.
- OPENSSL_EXPORT void CRYPTO_poly1305_init(poly1305_state *state,
- const uint8_t key[32]);
- // CRYPTO_poly1305_update processes |in_len| bytes from |in|. It can be called
- // zero or more times after poly1305_init.
- OPENSSL_EXPORT void CRYPTO_poly1305_update(poly1305_state *state,
- const uint8_t *in, size_t in_len);
- // CRYPTO_poly1305_finish completes the poly1305 calculation and writes a 16
- // byte authentication tag to |mac|.
- OPENSSL_EXPORT void CRYPTO_poly1305_finish(poly1305_state *state,
- uint8_t mac[16]);
- #if defined(__cplusplus)
- } // extern C
- #endif
- #endif // OPENSSL_HEADER_POLY1305_H
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