66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
/*
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* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef BR_BEARSSL_PRF_H__
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#define BR_BEARSSL_PRF_H__
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#include <stddef.h>
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#include <stdint.h>
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/*
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* The TLS PRF
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* -----------
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*
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* TLS 1.0 and 1.1 define a PRF that is based on both MD5 and SHA-1. This
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* is implemented by the br_tls10_prf() function.
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*
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* TLS 1.2 redefines the PRF, using an explicit hash function. The
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* br_tls12_sha256_prf() and br_tls12_sha384_prf() functions apply that
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* PRF with, respectively, SHA-256 and SHA-384.
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*
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* The PRF always uses as input three parameters: a "secret" (some
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* bytes), a "label" (ASCII string), and a "seed" (again some bytes).
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* An arbitrary output length can be produced.
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*/
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void br_tls10_prf(void *dst, size_t len,
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const void *secret, size_t secret_len,
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const char *label, const void *seed, size_t seed_len);
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void br_tls12_sha256_prf(void *dst, size_t len,
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const void *secret, size_t secret_len,
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const char *label, const void *seed, size_t seed_len);
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void br_tls12_sha384_prf(void *dst, size_t len,
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const void *secret, size_t secret_len,
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const char *label, const void *seed, size_t seed_len);
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/*
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* A convenient type name for a PRF implementation.
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*/
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typedef void (*br_tls_prf_impl)(void *dst, size_t len,
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const void *secret, size_t secret_len,
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const char *label, const void *seed, size_t seed_len);
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#endif
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