4a9313a7e7
For the most part, this is with random test data which isn't particularly good. But we'll be able to add more interesting test vectors as they come up. Change-Id: I9c50db7ac2c4bf978d4901000ab32e3642aea82b Reviewed-on: https://boringssl-review.googlesource.com/12222 Reviewed-by: Adam Langley <agl@google.com> Commit-Queue: Adam Langley <agl@google.com> CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
111 lines
4.0 KiB
C
111 lines
4.0 KiB
C
/* Copyright (c) 2014, Intel Corporation.
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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_P256_X86_64_H
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#define OPENSSL_HEADER_EC_P256_X86_64_H
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#include <openssl/base.h>
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#include <openssl/bn.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#if !defined(OPENSSL_NO_ASM) && defined(OPENSSL_X86_64) && \
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!defined(OPENSSL_SMALL)
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/* P-256 field operations.
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*
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* An element mod P in P-256 is represented as a little-endian array of
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* |P256_LIMBS| |BN_ULONG|s, spanning the full range of values.
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*
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* The following functions take fully-reduced inputs mod P and give
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* fully-reduced outputs. They may be used in-place. */
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#define P256_LIMBS (256 / BN_BITS2)
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/* ecp_nistz256_neg sets |res| to -|a| mod P. */
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void ecp_nistz256_neg(BN_ULONG res[P256_LIMBS], const BN_ULONG a[P256_LIMBS]);
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/* ecp_nistz256_mul_mont sets |res| to |a| * |b| * 2^-256 mod P. */
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void ecp_nistz256_mul_mont(BN_ULONG res[P256_LIMBS],
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const BN_ULONG a[P256_LIMBS],
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const BN_ULONG b[P256_LIMBS]);
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/* ecp_nistz256_sqr_mont sets |res| to |a| * |a| * 2^-256 mod P. */
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void ecp_nistz256_sqr_mont(BN_ULONG res[P256_LIMBS],
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const BN_ULONG a[P256_LIMBS]);
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/* ecp_nistz256_from_mont sets |res| to |in|, converted from Montgomery domain
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* by multiplying with 1. */
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void ecp_nistz256_from_mont(BN_ULONG res[P256_LIMBS],
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const BN_ULONG in[P256_LIMBS]);
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/* P-256 point operations.
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*
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* The following functions may be used in-place. All coordinates are in the
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* Montgomery domain. */
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/* A P256_POINT represents a P-256 point in Jacobian coordinates. */
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typedef struct {
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BN_ULONG X[P256_LIMBS];
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BN_ULONG Y[P256_LIMBS];
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BN_ULONG Z[P256_LIMBS];
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} P256_POINT;
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/* A P256_POINT_AFFINE represents a P-256 point in affine coordinates. Infinity
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* is encoded as (0, 0). */
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typedef struct {
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BN_ULONG X[P256_LIMBS];
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BN_ULONG Y[P256_LIMBS];
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} P256_POINT_AFFINE;
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/* ecp_nistz256_select_w5 sets |*val| to |in_t[index-1]| if 1 <= |index| <= 16
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* and all zeros (the point at infinity) if |index| is 0. This is done in
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* constant time. */
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void ecp_nistz256_select_w5(P256_POINT *val, const P256_POINT in_t[16],
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int index);
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/* ecp_nistz256_select_w7 sets |*val| to |in_t[index-1]| if 1 <= |index| <= 64
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* and all zeros (the point at infinity) if |index| is 0. This is done in
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* constant time. */
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void ecp_nistz256_select_w7(P256_POINT_AFFINE *val,
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const P256_POINT_AFFINE in_t[64], int index);
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/* ecp_nistz256_point_double sets |r| to |a| doubled. */
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void ecp_nistz256_point_double(P256_POINT *r, const P256_POINT *a);
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/* ecp_nistz256_point_add adds |a| to |b| and places the result in |r|. */
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void ecp_nistz256_point_add(P256_POINT *r, const P256_POINT *a,
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const P256_POINT *b);
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/* ecp_nistz256_point_add_affine adds |a| to |b| and places the result in
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* |r|. |a| and |b| must not represent the same point unless they are both
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* infinity. */
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void ecp_nistz256_point_add_affine(P256_POINT *r, const P256_POINT *a,
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const P256_POINT_AFFINE *b);
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#endif /* !defined(OPENSSL_NO_ASM) && defined(OPENSSL_X86_64) && \
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!defined(OPENSSL_SMALL) */
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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_P256_X86_64_H */
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