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- /* ge_448.h
- *
- * Copyright (C) 2006-2022 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
- */
- #ifndef WOLF_CRYPT_GE_448_H
- #define WOLF_CRYPT_GE_448_H
- #include <wolfssl/wolfcrypt/settings.h>
- #ifdef HAVE_ED448
- #include <wolfssl/wolfcrypt/fe_448.h>
- /*
- ge448 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 = -39081.
- Representations:
- ge448_p2 (projective) : (X:Y:Z) satisfying x=X/Z, y=Y/Z
- ge448_precomp (affine): (x,y)
- */
- #ifdef ED448_SMALL
- typedef byte ge448;
- #define GE448_WORDS 56
- #elif defined(CURVED448_128BIT)
- typedef sword64 ge448;
- #define GE448_WORDS 8
- #else
- typedef sword32 ge448;
- #define GE448_WORDS 16
- #endif
- typedef struct {
- ge448 X[GE448_WORDS];
- ge448 Y[GE448_WORDS];
- ge448 Z[GE448_WORDS];
- } ge448_p2;
- WOLFSSL_LOCAL int ge448_compress_key(byte* out, const byte* xIn, const byte* yIn);
- WOLFSSL_LOCAL int ge448_from_bytes_negate_vartime(ge448_p2 *r, const byte *b);
- WOLFSSL_LOCAL int ge448_double_scalarmult_vartime(ge448_p2 *r, const byte *a,
- const ge448_p2 *A, const byte *b);
- WOLFSSL_LOCAL void ge448_scalarmult_base(ge448_p2* h, const byte* a);
- WOLFSSL_LOCAL void sc448_reduce(byte* b);
- WOLFSSL_LOCAL void sc448_muladd(byte* r, const byte* a, const byte* b, const byte* d);
- WOLFSSL_LOCAL void ge448_to_bytes(byte *s, const ge448_p2 *h);
- #ifndef ED448_SMALL
- typedef struct {
- ge448 x[GE448_WORDS];
- ge448 y[GE448_WORDS];
- } ge448_precomp;
- #endif /* !ED448_SMALL */
- #endif /* HAVE_ED448 */
- #endif /* WOLF_CRYPT_GE_448_H */
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