Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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57 lines
2.3 KiB
57 lines
2.3 KiB
5 years ago
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/* Copyright (c) 2020, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#ifndef OPENSSL_HEADER_EC_EXTRA_INTERNAL_H
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#define OPENSSL_HEADER_EC_EXTRA_INTERNAL_H
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#include <openssl/ec.h>
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#include "../fipsmodule/ec/internal.h"
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#if defined(__cplusplus)
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extern "C" {
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#endif
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// Hash-to-curve.
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//
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// The following functions implement primitives from
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// draft-irtf-cfrg-hash-to-curve. The |dst| parameter in each function is the
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// domain separation tag and must be unique for each protocol and between the
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// |hash_to_curve| and |hash_to_scalar| variants. See section 3.1 of the spec
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// for additional guidance on this parameter.
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// ec_hash_to_curve_p384_xmd_sha512_sswu_draft07 hashes |msg| to a point on
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// |group| and writes the result to |out|, implementing the
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// P384_XMD:SHA-512_SSWU_RO_ suite from draft-irtf-cfrg-hash-to-curve-07. It
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// returns one on success and zero on error.
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OPENSSL_EXPORT int ec_hash_to_curve_p384_xmd_sha512_sswu_draft07(
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const EC_GROUP *group, EC_RAW_POINT *out, const uint8_t *dst,
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size_t dst_len, const uint8_t *msg, size_t msg_len);
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// ec_hash_to_scalar_p384_xmd_sha512_draft07 hashes |msg| to a scalar on |group|
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// and writes the result to |out|, using the hash_to_field operation from the
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// P384_XMD:SHA-512_SSWU_RO_ suite from draft-irtf-cfrg-hash-to-curve-07, but
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// generating a value modulo the group order rather than a field element.
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OPENSSL_EXPORT int ec_hash_to_scalar_p384_xmd_sha512_draft07(
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const EC_GROUP *group, EC_SCALAR *out, const uint8_t *dst, size_t dst_len,
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const uint8_t *msg, size_t msg_len);
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#if defined(__cplusplus)
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} // extern C
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#endif
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#endif // OPENSSL_HEADER_EC_EXTRA_INTERNAL_H
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