wolf SSL / wolfSSL

wolfSSL SSL/TLS library, support up to TLS1.3

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wolfssl/wolfcrypt/ge_operations.h@0:d92f9d21154c, 2015-06-26 (annotated)

Committer:
wolfSSL
Date:
Fri Jun 26 00:39:20 2015 +0000
Revision:
0:d92f9d21154c
wolfSSL 3.6.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 0:d92f9d21154c 1 /* ge_operations.h
wolfSSL 0:d92f9d21154c 2 *
wolfSSL 0:d92f9d21154c 3 * Copyright (C) 2006-2015 wolfSSL Inc.
wolfSSL 0:d92f9d21154c 4 *
wolfSSL 0:d92f9d21154c 5 * This file is part of wolfSSL. (formerly known as CyaSSL)
wolfSSL 0:d92f9d21154c 6 *
wolfSSL 0:d92f9d21154c 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 0:d92f9d21154c 8 * it under the terms of the GNU General Public License as published by
wolfSSL 0:d92f9d21154c 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 0:d92f9d21154c 10 * (at your option) any later version.
wolfSSL 0:d92f9d21154c 11 *
wolfSSL 0:d92f9d21154c 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 0:d92f9d21154c 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 0:d92f9d21154c 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 0:d92f9d21154c 15 * GNU General Public License for more details.
wolfSSL 0:d92f9d21154c 16 *
wolfSSL 0:d92f9d21154c 17 * You should have received a copy of the GNU General Public License
wolfSSL 0:d92f9d21154c 18 * along with this program; if not, write to the Free Software
wolfSSL 0:d92f9d21154c 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
wolfSSL 0:d92f9d21154c 20 */
wolfSSL 0:d92f9d21154c 21
wolfSSL 0:d92f9d21154c 22 /* Based On Daniel J Bernstein's ed25519 Public Domain ref10 work. */
wolfSSL 0:d92f9d21154c 23
wolfSSL 0:d92f9d21154c 24 #ifndef WOLF_CRYPT_GE_OPERATIONS_H
wolfSSL 0:d92f9d21154c 25 #define WOLF_CRYPT_GE_OPERATIONS_H
wolfSSL 0:d92f9d21154c 26
wolfSSL 0:d92f9d21154c 27 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 0:d92f9d21154c 28
wolfSSL 0:d92f9d21154c 29 #ifdef HAVE_ED25519
wolfSSL 0:d92f9d21154c 30
wolfSSL 0:d92f9d21154c 31 #ifndef CURVED25519_SMALL
wolfSSL 0:d92f9d21154c 32 #include <stdint.h>
wolfSSL 0:d92f9d21154c 33 #endif
wolfSSL 0:d92f9d21154c 34 #include <wolfssl/wolfcrypt/fe_operations.h>
wolfSSL 0:d92f9d21154c 35
wolfSSL 0:d92f9d21154c 36 /*
wolfSSL 0:d92f9d21154c 37 ge means group element.
wolfSSL 0:d92f9d21154c 38
wolfSSL 0:d92f9d21154c 39 Here the group is the set of pairs (x,y) of field elements (see fe.h)
wolfSSL 0:d92f9d21154c 40 satisfying -x^2 + y^2 = 1 + d x^2y^2
wolfSSL 0:d92f9d21154c 41 where d = -121665/121666.
wolfSSL 0:d92f9d21154c 42
wolfSSL 0:d92f9d21154c 43 Representations:
wolfSSL 0:d92f9d21154c 44 ge_p2 (projective): (X:Y:Z) satisfying x=X/Z, y=Y/Z
wolfSSL 0:d92f9d21154c 45 ge_p3 (extended): (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT
wolfSSL 0:d92f9d21154c 46 ge_p1p1 (completed): ((X:Z),(Y:T)) satisfying x=X/Z, y=Y/T
wolfSSL 0:d92f9d21154c 47 ge_precomp (Duif): (y+x,y-x,2dxy)
wolfSSL 0:d92f9d21154c 48 */
wolfSSL 0:d92f9d21154c 49
wolfSSL 0:d92f9d21154c 50
wolfSSL 0:d92f9d21154c 51 typedef struct {
wolfSSL 0:d92f9d21154c 52 fe X;
wolfSSL 0:d92f9d21154c 53 fe Y;
wolfSSL 0:d92f9d21154c 54 fe Z;
wolfSSL 0:d92f9d21154c 55 } ge_p2;
wolfSSL 0:d92f9d21154c 56
wolfSSL 0:d92f9d21154c 57 typedef struct {
wolfSSL 0:d92f9d21154c 58 fe X;
wolfSSL 0:d92f9d21154c 59 fe Y;
wolfSSL 0:d92f9d21154c 60 fe Z;
wolfSSL 0:d92f9d21154c 61 fe T;
wolfSSL 0:d92f9d21154c 62 } ge_p3;
wolfSSL 0:d92f9d21154c 63
wolfSSL 0:d92f9d21154c 64 WOLFSSL_LOCAL int ge_compress_key(byte* out, const byte* xIn, const byte* yIn,
wolfSSL 0:d92f9d21154c 65 word32 keySz);
wolfSSL 0:d92f9d21154c 66 WOLFSSL_LOCAL int ge_frombytes_negate_vartime(ge_p3 *,const unsigned char *);
wolfSSL 0:d92f9d21154c 67
wolfSSL 0:d92f9d21154c 68 WOLFSSL_LOCAL int ge_double_scalarmult_vartime(ge_p2 *,const unsigned char *,
wolfSSL 0:d92f9d21154c 69 const ge_p3 *,const unsigned char *);
wolfSSL 0:d92f9d21154c 70 WOLFSSL_LOCAL void ge_scalarmult_base(ge_p3 *,const unsigned char *);
wolfSSL 0:d92f9d21154c 71 WOLFSSL_LOCAL void sc_reduce(byte* s);
wolfSSL 0:d92f9d21154c 72 WOLFSSL_LOCAL void sc_muladd(byte* s, const byte* a, const byte* b,
wolfSSL 0:d92f9d21154c 73 const byte* c);
wolfSSL 0:d92f9d21154c 74 WOLFSSL_LOCAL void ge_tobytes(unsigned char *,const ge_p2 *);
wolfSSL 0:d92f9d21154c 75 WOLFSSL_LOCAL void ge_p3_tobytes(unsigned char *,const ge_p3 *);
wolfSSL 0:d92f9d21154c 76
wolfSSL 0:d92f9d21154c 77 #ifndef CURVED25519_SMALL
wolfSSL 0:d92f9d21154c 78 typedef struct {
wolfSSL 0:d92f9d21154c 79 fe X;
wolfSSL 0:d92f9d21154c 80 fe Y;
wolfSSL 0:d92f9d21154c 81 fe Z;
wolfSSL 0:d92f9d21154c 82 fe T;
wolfSSL 0:d92f9d21154c 83 } ge_p1p1;
wolfSSL 0:d92f9d21154c 84
wolfSSL 0:d92f9d21154c 85 typedef struct {
wolfSSL 0:d92f9d21154c 86 fe yplusx;
wolfSSL 0:d92f9d21154c 87 fe yminusx;
wolfSSL 0:d92f9d21154c 88 fe xy2d;
wolfSSL 0:d92f9d21154c 89 } ge_precomp;
wolfSSL 0:d92f9d21154c 90
wolfSSL 0:d92f9d21154c 91 typedef struct {
wolfSSL 0:d92f9d21154c 92 fe YplusX;
wolfSSL 0:d92f9d21154c 93 fe YminusX;
wolfSSL 0:d92f9d21154c 94 fe Z;
wolfSSL 0:d92f9d21154c 95 fe T2d;
wolfSSL 0:d92f9d21154c 96 } ge_cached;
wolfSSL 0:d92f9d21154c 97
wolfSSL 0:d92f9d21154c 98 WOLFSSL_LOCAL void ge_p2_0(ge_p2 *);
wolfSSL 0:d92f9d21154c 99 WOLFSSL_LOCAL void ge_p3_0(ge_p3 *);
wolfSSL 0:d92f9d21154c 100 WOLFSSL_LOCAL void ge_precomp_0(ge_precomp *);
wolfSSL 0:d92f9d21154c 101 WOLFSSL_LOCAL void ge_p3_to_p2(ge_p2 *,const ge_p3 *);
wolfSSL 0:d92f9d21154c 102 WOLFSSL_LOCAL void ge_p3_to_cached(ge_cached *,const ge_p3 *);
wolfSSL 0:d92f9d21154c 103 WOLFSSL_LOCAL void ge_p1p1_to_p2(ge_p2 *,const ge_p1p1 *);
wolfSSL 0:d92f9d21154c 104 WOLFSSL_LOCAL void ge_p1p1_to_p3(ge_p3 *,const ge_p1p1 *);
wolfSSL 0:d92f9d21154c 105 WOLFSSL_LOCAL void ge_p2_dbl(ge_p1p1 *,const ge_p2 *);
wolfSSL 0:d92f9d21154c 106 WOLFSSL_LOCAL void ge_p3_dbl(ge_p1p1 *,const ge_p3 *);
wolfSSL 0:d92f9d21154c 107
wolfSSL 0:d92f9d21154c 108 WOLFSSL_LOCAL void ge_madd(ge_p1p1 *,const ge_p3 *,const ge_precomp *);
wolfSSL 0:d92f9d21154c 109 WOLFSSL_LOCAL void ge_msub(ge_p1p1 *,const ge_p3 *,const ge_precomp *);
wolfSSL 0:d92f9d21154c 110 WOLFSSL_LOCAL void ge_add(ge_p1p1 *,const ge_p3 *,const ge_cached *);
wolfSSL 0:d92f9d21154c 111 WOLFSSL_LOCAL void ge_sub(ge_p1p1 *,const ge_p3 *,const ge_cached *);
wolfSSL 0:d92f9d21154c 112 #endif /* no CURVED25519_SMALL */
wolfSSL 0:d92f9d21154c 113 #endif /* HAVE_ED25519 */
wolfSSL 0:d92f9d21154c 114 #endif /* WOLF_CRYPT_GE_OPERATIONS_H */
wolfSSL 0:d92f9d21154c 115
wolfSSL 0:d92f9d21154c 116