4 * Created on: Jun, 2013
5 * Author: Elie Bursztein (elieb@google.com)
7 * Adapted from the estream code by D. Bernstein.
9 /* ====================================================================
10 * Copyright (c) 2011-2013 The OpenSSL Project. All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
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20 * notice, this list of conditions and the following disclaimer in
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25 * software must display the following acknowledgment:
26 * "This product includes software developed by the OpenSSL Project
27 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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40 * "This product includes software developed by the OpenSSL Project
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55 * ====================================================================
58 #ifndef HEADER_POLY1305_H_
59 #define HEADER_POLY1305_H_
62 #include <openssl/opensslconf.h>
64 #if defined(OPENSSL_NO_POLY1305)
65 #error Poly1305 support is disabled.
68 typedef unsigned char poly1305_state[512];
70 /* poly1305_init sets up |state| so that it can be used to calculate an
71 * authentication tag with the one-time key |key|. Note that |key| is a
72 * one-time key and therefore there is no `reset' method because that would
73 * enable several messages to be authenticated with the same key. */
74 extern void CRYPTO_poly1305_init(poly1305_state* state,
75 const unsigned char key[32]);
77 /* poly1305_update processes |in_len| bytes from |in|. It can be called zero or
78 * more times after poly1305_init. */
79 extern void CRYPTO_poly1305_update(poly1305_state* state,
80 const unsigned char *in,
83 /* poly1305_finish completes the poly1305 calculation and writes a 16 byte
84 * authentication tag to |mac|. */
85 extern void CRYPTO_poly1305_finish(poly1305_state* state,
86 unsigned char mac[16]);
88 #endif /* HEADER_POLY1305_H_ */