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- /* Copyright (c) 2014, Intel Corporation.
- *
- * 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_EC_P256_X86_64_H
- #define OPENSSL_HEADER_EC_P256_X86_64_H
-
- #include <openssl/base.h>
-
- #include <openssl/bn.h>
-
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
-
- #if !defined(OPENSSL_NO_ASM) && defined(OPENSSL_X86_64) && \
- !defined(OPENSSL_SMALL)
-
- /* P-256 field operations.
- *
- * An element mod P in P-256 is represented as a little-endian array of
- * |P256_LIMBS| |BN_ULONG|s, spanning the full range of values.
- *
- * The following functions take fully-reduced inputs mod P and give
- * fully-reduced outputs. They may be used in-place. */
-
- #define P256_LIMBS (256 / BN_BITS2)
-
- /* ecp_nistz256_neg sets |res| to -|a| mod P. */
- void ecp_nistz256_neg(BN_ULONG res[P256_LIMBS], const BN_ULONG a[P256_LIMBS]);
-
- /* ecp_nistz256_mul_mont sets |res| to |a| * |b| * 2^-256 mod P. */
- void ecp_nistz256_mul_mont(BN_ULONG res[P256_LIMBS],
- const BN_ULONG a[P256_LIMBS],
- const BN_ULONG b[P256_LIMBS]);
-
- /* ecp_nistz256_sqr_mont sets |res| to |a| * |a| * 2^-256 mod P. */
- void ecp_nistz256_sqr_mont(BN_ULONG res[P256_LIMBS],
- const BN_ULONG a[P256_LIMBS]);
-
- /* ecp_nistz256_from_mont sets |res| to |in|, converted from Montgomery domain
- * by multiplying with 1. */
- void ecp_nistz256_from_mont(BN_ULONG res[P256_LIMBS],
- const BN_ULONG in[P256_LIMBS]);
-
-
- /* P-256 point operations.
- *
- * The following functions may be used in-place. All coordinates are in the
- * Montgomery domain. */
-
- /* A P256_POINT represents a P-256 point in Jacobian coordinates. */
- typedef struct {
- BN_ULONG X[P256_LIMBS];
- BN_ULONG Y[P256_LIMBS];
- BN_ULONG Z[P256_LIMBS];
- } P256_POINT;
-
- /* A P256_POINT_AFFINE represents a P-256 point in affine coordinates. Infinity
- * is encoded as (0, 0). */
- typedef struct {
- BN_ULONG X[P256_LIMBS];
- BN_ULONG Y[P256_LIMBS];
- } P256_POINT_AFFINE;
-
- /* ecp_nistz256_select_w5 sets |*val| to |in_t[index-1]| if 1 <= |index| <= 16
- * and all zeros (the point at infinity) if |index| is 0. This is done in
- * constant time. */
- void ecp_nistz256_select_w5(P256_POINT *val, const P256_POINT in_t[16],
- int index);
-
- /* ecp_nistz256_select_w7 sets |*val| to |in_t[index-1]| if 1 <= |index| <= 64
- * and all zeros (the point at infinity) if |index| is 0. This is done in
- * constant time. */
- void ecp_nistz256_select_w7(P256_POINT_AFFINE *val,
- const P256_POINT_AFFINE in_t[64], int index);
-
- /* ecp_nistz256_point_double sets |r| to |a| doubled. */
- void ecp_nistz256_point_double(P256_POINT *r, const P256_POINT *a);
-
- /* ecp_nistz256_point_add adds |a| to |b| and places the result in |r|. */
- void ecp_nistz256_point_add(P256_POINT *r, const P256_POINT *a,
- const P256_POINT *b);
-
- /* ecp_nistz256_point_add_affine adds |a| to |b| and places the result in
- * |r|. |a| and |b| must not represent the same point unless they are both
- * infinity. */
- void ecp_nistz256_point_add_affine(P256_POINT *r, const P256_POINT *a,
- const P256_POINT_AFFINE *b);
-
- #endif /* !defined(OPENSSL_NO_ASM) && defined(OPENSSL_X86_64) && \
- !defined(OPENSSL_SMALL) */
-
-
- #if defined(__cplusplus)
- } /* extern C++ */
- #endif
-
- #endif /* OPENSSL_HEADER_EC_P256_X86_64_H */
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