wolf SSL / wolfSSL

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

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wolfssl/wolfcrypt/fe_operations.h@17:a5f916481144, 2020-06-05 (annotated)

Committer:
wolfSSL
Date:
Fri Jun 05 00:11:07 2020 +0000
Revision:
17:a5f916481144
Parent:
16:8e0d178b1d1e 
wolfSSL 4.4.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 15:117db924cf7c 1 /* fe_operations.h
wolfSSL 15:117db924cf7c 2 *
wolfSSL 16:8e0d178b1d1e 3 * Copyright (C) 2006-2020 wolfSSL Inc.
wolfSSL 15:117db924cf7c 4 *
wolfSSL 15:117db924cf7c 5 * This file is part of wolfSSL.
wolfSSL 15:117db924cf7c 6 *
wolfSSL 15:117db924cf7c 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 15:117db924cf7c 8 * it under the terms of the GNU General Public License as published by
wolfSSL 15:117db924cf7c 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 15:117db924cf7c 10 * (at your option) any later version.
wolfSSL 15:117db924cf7c 11 *
wolfSSL 15:117db924cf7c 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 15:117db924cf7c 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 15:117db924cf7c 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 15:117db924cf7c 15 * GNU General Public License for more details.
wolfSSL 15:117db924cf7c 16 *
wolfSSL 15:117db924cf7c 17 * You should have received a copy of the GNU General Public License
wolfSSL 15:117db924cf7c 18 * along with this program; if not, write to the Free Software
wolfSSL 15:117db924cf7c 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 15:117db924cf7c 20 */
wolfSSL 15:117db924cf7c 21
wolfSSL 15:117db924cf7c 22
wolfSSL 15:117db924cf7c 23 #ifndef WOLF_CRYPT_FE_OPERATIONS_H
wolfSSL 15:117db924cf7c 24 #define WOLF_CRYPT_FE_OPERATIONS_H
wolfSSL 15:117db924cf7c 25
wolfSSL 15:117db924cf7c 26 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 15:117db924cf7c 27
wolfSSL 15:117db924cf7c 28 #if defined(HAVE_CURVE25519) || defined(HAVE_ED25519)
wolfSSL 15:117db924cf7c 29
wolfSSL 15:117db924cf7c 30 #if !defined(CURVE25519_SMALL) || !defined(ED25519_SMALL)
wolfSSL 15:117db924cf7c 31 #include <stdint.h>
wolfSSL 15:117db924cf7c 32 #endif
wolfSSL 15:117db924cf7c 33
wolfSSL 15:117db924cf7c 34 #include <wolfssl/wolfcrypt/types.h>
wolfSSL 15:117db924cf7c 35
wolfSSL 15:117db924cf7c 36 #if defined(USE_INTEL_SPEEDUP) && !defined(NO_CURVED25519_X64)
wolfSSL 15:117db924cf7c 37 #define CURVED25519_X64
wolfSSL 15:117db924cf7c 38 #elif defined(HAVE___UINT128_T) && !defined(NO_CURVED25519_128BIT)
wolfSSL 15:117db924cf7c 39 #define CURVED25519_128BIT
wolfSSL 15:117db924cf7c 40 #endif
wolfSSL 15:117db924cf7c 41
wolfSSL 16:8e0d178b1d1e 42 #if defined(CURVED25519_X64)
wolfSSL 16:8e0d178b1d1e 43 #define CURVED25519_ASM_64BIT
wolfSSL 16:8e0d178b1d1e 44 #define CURVED25519_ASM
wolfSSL 16:8e0d178b1d1e 45 #endif
wolfSSL 16:8e0d178b1d1e 46 #if defined(WOLFSSL_ARMASM)
wolfSSL 16:8e0d178b1d1e 47 #ifdef __aarch64__
wolfSSL 16:8e0d178b1d1e 48 #define CURVED25519_ASM_64BIT
wolfSSL 16:8e0d178b1d1e 49 #else
wolfSSL 16:8e0d178b1d1e 50 #define CURVED25519_ASM_32BIT
wolfSSL 16:8e0d178b1d1e 51 #endif
wolfSSL 16:8e0d178b1d1e 52 #define CURVED25519_ASM
wolfSSL 16:8e0d178b1d1e 53 #endif
wolfSSL 16:8e0d178b1d1e 54
wolfSSL 15:117db924cf7c 55 /*
wolfSSL 15:117db924cf7c 56 fe means field element.
wolfSSL 15:117db924cf7c 57 Here the field is \Z/(2^255-19).
wolfSSL 15:117db924cf7c 58 An element t, entries t[0]...t[9], represents the integer
wolfSSL 15:117db924cf7c 59 t[0]+2^26 t[1]+2^51 t[2]+2^77 t[3]+2^102 t[4]+...+2^230 t[9].
wolfSSL 15:117db924cf7c 60 Bounds on each t[i] vary depending on context.
wolfSSL 15:117db924cf7c 61 */
wolfSSL 15:117db924cf7c 62
wolfSSL 16:8e0d178b1d1e 63 #ifdef __cplusplus
wolfSSL 16:8e0d178b1d1e 64 extern "C" {
wolfSSL 16:8e0d178b1d1e 65 #endif
wolfSSL 16:8e0d178b1d1e 66
wolfSSL 15:117db924cf7c 67 #if defined(CURVE25519_SMALL) || defined(ED25519_SMALL)
wolfSSL 15:117db924cf7c 68 #define F25519_SIZE 32
wolfSSL 15:117db924cf7c 69
wolfSSL 15:117db924cf7c 70 WOLFSSL_LOCAL void lm_copy(byte*, const byte*);
wolfSSL 15:117db924cf7c 71 WOLFSSL_LOCAL void lm_add(byte*, const byte*, const byte*);
wolfSSL 15:117db924cf7c 72 WOLFSSL_LOCAL void lm_sub(byte*, const byte*, const byte*);
wolfSSL 15:117db924cf7c 73 WOLFSSL_LOCAL void lm_neg(byte*,const byte*);
wolfSSL 15:117db924cf7c 74 WOLFSSL_LOCAL void lm_invert(byte*, const byte*);
wolfSSL 15:117db924cf7c 75 WOLFSSL_LOCAL void lm_mul(byte*,const byte*,const byte*);
wolfSSL 15:117db924cf7c 76 #endif
wolfSSL 15:117db924cf7c 77
wolfSSL 15:117db924cf7c 78
wolfSSL 15:117db924cf7c 79 #if !defined(FREESCALE_LTC_ECC)
wolfSSL 15:117db924cf7c 80 WOLFSSL_LOCAL void fe_init(void);
wolfSSL 15:117db924cf7c 81
wolfSSL 15:117db924cf7c 82 WOLFSSL_LOCAL int curve25519(byte * q, byte * n, byte * p);
wolfSSL 15:117db924cf7c 83 #endif
wolfSSL 15:117db924cf7c 84
wolfSSL 15:117db924cf7c 85 /* default to be faster but take more memory */
wolfSSL 15:117db924cf7c 86 #if !defined(CURVE25519_SMALL) || !defined(ED25519_SMALL)
wolfSSL 15:117db924cf7c 87
wolfSSL 16:8e0d178b1d1e 88 #ifdef CURVED25519_ASM_64BIT
wolfSSL 15:117db924cf7c 89 typedef int64_t fe[4];
wolfSSL 16:8e0d178b1d1e 90 #elif defined(CURVED25519_ASM_32BIT)
wolfSSL 16:8e0d178b1d1e 91 typedef int32_t fe[8];
wolfSSL 15:117db924cf7c 92 #elif defined(CURVED25519_128BIT)
wolfSSL 15:117db924cf7c 93 typedef int64_t fe[5];
wolfSSL 15:117db924cf7c 94 #else
wolfSSL 15:117db924cf7c 95 typedef int32_t fe[10];
wolfSSL 15:117db924cf7c 96 #endif
wolfSSL 15:117db924cf7c 97
wolfSSL 15:117db924cf7c 98 WOLFSSL_LOCAL void fe_copy(fe, const fe);
wolfSSL 15:117db924cf7c 99 WOLFSSL_LOCAL void fe_add(fe, const fe, const fe);
wolfSSL 15:117db924cf7c 100 WOLFSSL_LOCAL void fe_neg(fe,const fe);
wolfSSL 15:117db924cf7c 101 WOLFSSL_LOCAL void fe_sub(fe, const fe, const fe);
wolfSSL 15:117db924cf7c 102 WOLFSSL_LOCAL void fe_invert(fe, const fe);
wolfSSL 15:117db924cf7c 103 WOLFSSL_LOCAL void fe_mul(fe,const fe,const fe);
wolfSSL 15:117db924cf7c 104
wolfSSL 15:117db924cf7c 105
wolfSSL 15:117db924cf7c 106 /* Based On Daniel J Bernstein's curve25519 and ed25519 Public Domain ref10
wolfSSL 15:117db924cf7c 107 work. */
wolfSSL 15:117db924cf7c 108
wolfSSL 15:117db924cf7c 109 WOLFSSL_LOCAL void fe_0(fe);
wolfSSL 15:117db924cf7c 110 WOLFSSL_LOCAL void fe_1(fe);
wolfSSL 15:117db924cf7c 111 WOLFSSL_LOCAL int fe_isnonzero(const fe);
wolfSSL 15:117db924cf7c 112 WOLFSSL_LOCAL int fe_isnegative(const fe);
wolfSSL 15:117db924cf7c 113 WOLFSSL_LOCAL void fe_tobytes(unsigned char *, const fe);
wolfSSL 15:117db924cf7c 114 WOLFSSL_LOCAL void fe_sq(fe, const fe);
wolfSSL 15:117db924cf7c 115 WOLFSSL_LOCAL void fe_sq2(fe,const fe);
wolfSSL 15:117db924cf7c 116 WOLFSSL_LOCAL void fe_frombytes(fe,const unsigned char *);
wolfSSL 15:117db924cf7c 117 WOLFSSL_LOCAL void fe_cswap(fe, fe, int);
wolfSSL 15:117db924cf7c 118 WOLFSSL_LOCAL void fe_mul121666(fe,fe);
wolfSSL 15:117db924cf7c 119 WOLFSSL_LOCAL void fe_cmov(fe,const fe, int);
wolfSSL 15:117db924cf7c 120 WOLFSSL_LOCAL void fe_pow22523(fe,const fe);
wolfSSL 15:117db924cf7c 121
wolfSSL 15:117db924cf7c 122 /* 64 type needed for SHA512 */
wolfSSL 15:117db924cf7c 123 WOLFSSL_LOCAL uint64_t load_3(const unsigned char *in);
wolfSSL 15:117db924cf7c 124 WOLFSSL_LOCAL uint64_t load_4(const unsigned char *in);
wolfSSL 15:117db924cf7c 125
wolfSSL 16:8e0d178b1d1e 126 #ifdef CURVED25519_ASM
wolfSSL 15:117db924cf7c 127 WOLFSSL_LOCAL void fe_ge_to_p2(fe rx, fe ry, fe rz, const fe px, const fe py,
wolfSSL 15:117db924cf7c 128 const fe pz, const fe pt);
wolfSSL 15:117db924cf7c 129 WOLFSSL_LOCAL void fe_ge_to_p3(fe rx, fe ry, fe rz, fe rt, const fe px,
wolfSSL 15:117db924cf7c 130 const fe py, const fe pz, const fe pt);
wolfSSL 15:117db924cf7c 131 WOLFSSL_LOCAL void fe_ge_dbl(fe rx, fe ry, fe rz, fe rt, const fe px,
wolfSSL 15:117db924cf7c 132 const fe py, const fe pz);
wolfSSL 15:117db924cf7c 133 WOLFSSL_LOCAL void fe_ge_madd(fe rx, fe ry, fe rz, fe rt, const fe px,
wolfSSL 15:117db924cf7c 134 const fe py, const fe pz, const fe pt,
wolfSSL 15:117db924cf7c 135 const fe qxy2d, const fe qyplusx,
wolfSSL 15:117db924cf7c 136 const fe qyminusx);
wolfSSL 15:117db924cf7c 137 WOLFSSL_LOCAL void fe_ge_msub(fe rx, fe ry, fe rz, fe rt, const fe px,
wolfSSL 15:117db924cf7c 138 const fe py, const fe pz, const fe pt,
wolfSSL 15:117db924cf7c 139 const fe qxy2d, const fe qyplusx,
wolfSSL 15:117db924cf7c 140 const fe qyminusx);
wolfSSL 15:117db924cf7c 141 WOLFSSL_LOCAL void fe_ge_add(fe rx, fe ry, fe rz, fe rt, const fe px,
wolfSSL 15:117db924cf7c 142 const fe py, const fe pz, const fe pt, const fe qz,
wolfSSL 15:117db924cf7c 143 const fe qt2d, const fe qyplusx,
wolfSSL 15:117db924cf7c 144 const fe qyminusx);
wolfSSL 15:117db924cf7c 145 WOLFSSL_LOCAL void fe_ge_sub(fe rx, fe ry, fe rz, fe rt, const fe px,
wolfSSL 15:117db924cf7c 146 const fe py, const fe pz, const fe pt, const fe qz,
wolfSSL 15:117db924cf7c 147 const fe qt2d, const fe qyplusx,
wolfSSL 15:117db924cf7c 148 const fe qyminusx);
wolfSSL 15:117db924cf7c 149 WOLFSSL_LOCAL void fe_cmov_table(fe* r, fe* base, signed char b);
wolfSSL 16:8e0d178b1d1e 150 #endif /* CURVED25519_ASM */
wolfSSL 15:117db924cf7c 151 #endif /* !CURVE25519_SMALL || !ED25519_SMALL */
wolfSSL 15:117db924cf7c 152
wolfSSL 15:117db924cf7c 153 /* Use less memory and only 32bit types or less, but is slower
wolfSSL 15:117db924cf7c 154 Based on Daniel Beer's public domain work. */
wolfSSL 15:117db924cf7c 155 #if defined(CURVE25519_SMALL) || defined(ED25519_SMALL)
wolfSSL 15:117db924cf7c 156 static const byte c25519_base_x[F25519_SIZE] = {9};
wolfSSL 15:117db924cf7c 157 static const byte f25519_zero[F25519_SIZE] = {0};
wolfSSL 15:117db924cf7c 158 static const byte f25519_one[F25519_SIZE] = {1};
wolfSSL 15:117db924cf7c 159 static const byte fprime_zero[F25519_SIZE] = {0};
wolfSSL 15:117db924cf7c 160 static const byte fprime_one[F25519_SIZE] = {1};
wolfSSL 15:117db924cf7c 161
wolfSSL 15:117db924cf7c 162 WOLFSSL_LOCAL void fe_load(byte *x, word32 c);
wolfSSL 15:117db924cf7c 163 WOLFSSL_LOCAL void fe_normalize(byte *x);
wolfSSL 15:117db924cf7c 164 WOLFSSL_LOCAL void fe_inv__distinct(byte *r, const byte *x);
wolfSSL 15:117db924cf7c 165
wolfSSL 15:117db924cf7c 166 /* Conditional copy. If condition == 0, then zero is copied to dst. If
wolfSSL 15:117db924cf7c 167 * condition == 1, then one is copied to dst. Any other value results in
wolfSSL 15:117db924cf7c 168 * undefined behavior.
wolfSSL 15:117db924cf7c 169 */
wolfSSL 15:117db924cf7c 170 WOLFSSL_LOCAL void fe_select(byte *dst, const byte *zero, const byte *one,
wolfSSL 15:117db924cf7c 171 byte condition);
wolfSSL 15:117db924cf7c 172
wolfSSL 15:117db924cf7c 173 /* Multiply a point by a small constant. The two pointers are not
wolfSSL 15:117db924cf7c 174 * required to be distinct.
wolfSSL 15:117db924cf7c 175 *
wolfSSL 15:117db924cf7c 176 * The constant must be less than 2^24.
wolfSSL 15:117db924cf7c 177 */
wolfSSL 15:117db924cf7c 178 WOLFSSL_LOCAL void fe_mul_c(byte *r, const byte *a, word32 b);
wolfSSL 15:117db924cf7c 179 WOLFSSL_LOCAL void fe_mul__distinct(byte *r, const byte *a, const byte *b);
wolfSSL 15:117db924cf7c 180
wolfSSL 15:117db924cf7c 181 /* Compute one of the square roots of the field element, if the element
wolfSSL 15:117db924cf7c 182 * is square. The other square is -r.
wolfSSL 15:117db924cf7c 183 *
wolfSSL 15:117db924cf7c 184 * If the input is not square, the returned value is a valid field
wolfSSL 15:117db924cf7c 185 * element, but not the correct answer. If you don't already know that
wolfSSL 15:117db924cf7c 186 * your element is square, you should square the return value and test.
wolfSSL 15:117db924cf7c 187 */
wolfSSL 15:117db924cf7c 188 WOLFSSL_LOCAL void fe_sqrt(byte *r, const byte *x);
wolfSSL 15:117db924cf7c 189
wolfSSL 15:117db924cf7c 190 /* Conditional copy. If condition == 0, then zero is copied to dst. If
wolfSSL 15:117db924cf7c 191 * condition == 1, then one is copied to dst. Any other value results in
wolfSSL 15:117db924cf7c 192 * undefined behavior.
wolfSSL 15:117db924cf7c 193 */
wolfSSL 15:117db924cf7c 194 WOLFSSL_LOCAL void fprime_select(byte *dst, const byte *zero, const byte *one,
wolfSSL 15:117db924cf7c 195 byte condition);
wolfSSL 15:117db924cf7c 196 WOLFSSL_LOCAL void fprime_add(byte *r, const byte *a, const byte *modulus);
wolfSSL 15:117db924cf7c 197 WOLFSSL_LOCAL void fprime_sub(byte *r, const byte *a, const byte *modulus);
wolfSSL 15:117db924cf7c 198 WOLFSSL_LOCAL void fprime_mul(byte *r, const byte *a, const byte *b,
wolfSSL 15:117db924cf7c 199 const byte *modulus);
wolfSSL 15:117db924cf7c 200 WOLFSSL_LOCAL void fprime_copy(byte *x, const byte *a);
wolfSSL 15:117db924cf7c 201
wolfSSL 15:117db924cf7c 202 #endif /* CURVE25519_SMALL || ED25519_SMALL */
wolfSSL 16:8e0d178b1d1e 203
wolfSSL 16:8e0d178b1d1e 204 #ifdef __cplusplus
wolfSSL 16:8e0d178b1d1e 205 } /* extern "C" */
wolfSSL 16:8e0d178b1d1e 206 #endif
wolfSSL 16:8e0d178b1d1e 207
wolfSSL 15:117db924cf7c 208 #endif /* HAVE_CURVE25519 || HAVE_ED25519 */
wolfSSL 15:117db924cf7c 209
wolfSSL 15:117db924cf7c 210 #endif /* WOLF_CRYPT_FE_OPERATIONS_H */
wolfSSL 15:117db924cf7c 211