wolfssl-w32/wolfssl/wolfcrypt/ge_operations.h

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/* ge_operations.h
*
* Copyright (C) 2006-2023 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
/* Based On Daniel J Bernstein's ed25519 Public Domain ref10 work. */
#ifndef WOLF_CRYPT_GE_OPERATIONS_H
#define WOLF_CRYPT_GE_OPERATIONS_H
#include <wolfssl/wolfcrypt/settings.h>
#ifdef HAVE_ED25519
#include <wolfssl/wolfcrypt/fe_operations.h>
/*
ge means group element.
Here the group is the set of pairs (x,y) of field elements (see fe.h)
satisfying -x^2 + y^2 = 1 + d x^2y^2
where d = -121665/121666.
Representations:
ge_p2 (projective): (X:Y:Z) satisfying x=X/Z, y=Y/Z
ge_p3 (extended): (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT
ge_p1p1 (completed): ((X:Z),(Y:T)) satisfying x=X/Z, y=Y/T
ge_precomp (Duif): (y+x,y-x,2dxy)
*/
#ifdef ED25519_SMALL
ALIGN16 typedef byte ge[F25519_SIZE];
#elif defined(CURVED25519_ASM_64BIT)
ALIGN16 typedef sword64 ge[4];
#elif defined(CURVED25519_ASM_32BIT)
ALIGN16 typedef sword32 ge[8];
#elif defined(CURVED25519_128BIT)
ALIGN16 typedef sword64 ge[5];
#else
ALIGN16 typedef sword32 ge[10];
#endif
typedef struct {
ge X;
ge Y;
ge Z;
} ge_p2;
typedef struct {
ge X;
ge Y;
ge Z;
ge T;
} ge_p3;
#ifdef __cplusplus
extern "C" {
#endif
WOLFSSL_LOCAL int ge_compress_key(byte* out, const byte* xIn, const byte* yIn,
word32 keySz);
WOLFSSL_LOCAL int ge_frombytes_negate_vartime(ge_p3 *h,const unsigned char *s);
WOLFSSL_LOCAL int ge_double_scalarmult_vartime(ge_p2 *r, const unsigned char *a,
const ge_p3 *A, const unsigned char *b);
WOLFSSL_LOCAL void ge_scalarmult_base(ge_p3 *h,const unsigned char *a);
WOLFSSL_LOCAL void sc_reduce(byte* s);
WOLFSSL_LOCAL void sc_muladd(byte* s, const byte* a, const byte* b,
const byte* c);
WOLFSSL_LOCAL void ge_tobytes(unsigned char *s,const ge_p2 *h);
#ifndef GE_P3_TOBYTES_IMPL
#define ge_p3_tobytes(s, h) ge_tobytes((s), (const ge_p2 *)(h))
#else
WOLFSSL_LOCAL void ge_p3_tobytes(unsigned char *s,const ge_p3 *h);
#endif
#ifndef ED25519_SMALL
typedef struct {
ge X;
ge Y;
ge Z;
ge T;
} ge_p1p1;
typedef struct {
ge yplusx;
ge yminusx;
ge xy2d;
} ge_precomp;
typedef struct {
ge YplusX;
ge YminusX;
ge Z;
ge T2d;
} ge_cached;
#endif /* !ED25519_SMALL */
#ifdef CURVED25519_ASM
void ge_p1p1_to_p2(ge_p2 *r, const ge_p1p1 *p);
void ge_p1p1_to_p3(ge_p3 *r, const ge_p1p1 *p);
void ge_p2_dbl(ge_p1p1 *r, const ge_p2 *p);
#define ge_p3_dbl(r, p) ge_p2_dbl((ge_p1p1 *)(r), (ge_p2 *)(p))
void ge_madd(ge_p1p1 *r, const ge_p3 *p, const ge_precomp *q);
void ge_msub(ge_p1p1 *r, const ge_p3 *p, const ge_precomp *q);
void ge_add(ge_p1p1 *r, const ge_p3 *p, const ge_cached *q);
void ge_sub(ge_p1p1 *r, const ge_p3 *p, const ge_cached *q);
#endif
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HAVE_ED25519 */
#endif /* WOLF_CRYPT_GE_OPERATIONS_H */