release/src/router/openssl/crypto/bn/rsaz_exp.c

   1 /*****************************************************************************
   2 *                                                                            *
   3 *  Copyright (c) 2012, Intel Corporation                                     *
   4 *                                                                            *
   5 *  All rights reserved.                                                      *
   6 *                                                                            *
   7 *  Redistribution and use in source and binary forms, with or without        *
   8 *  modification, are permitted provided that the following conditions are    *
   9 *  met:                                                                      *
  10 *                                                                            *
  11 *  *  Redistributions of source code must retain the above copyright         *
  12 *     notice, this list of conditions and the following disclaimer.          *
  13 *                                                                            *
  14 *  *  Redistributions in binary form must reproduce the above copyright      *
  15 *     notice, this list of conditions and the following disclaimer in the    *
  16 *     documentation and/or other materials provided with the                 *
  17 *     distribution.                                                          *
  18 *                                                                            *
  19 *  *  Neither the name of the Intel Corporation nor the names of its         *
  20 *     contributors may be used to endorse or promote products derived from   *
  21 *     this software without specific prior written permission.               *
  22 *                                                                            *
  23 *                                                                            *
  24 *  THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION ""AS IS"" AND ANY          *
  25 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE         *
  26 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR        *
  27 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR            *
  28 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,     *
  29 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
  30 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
  31 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
  32 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
  33 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
  34 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
  35 *                                                                            *
  36 ******************************************************************************
  37 * Developers and authors:                                                    *
  38 * Shay Gueron (1, 2), and Vlad Krasnov (1)                                   *
  39 * (1) Intel Corporation, Israel Development Center, Haifa, Israel            *
  40 * (2) University of Haifa, Israel                                            *
  41 *****************************************************************************/
  42
  43 #include "rsaz_exp.h"
  44
  45 #ifdef RSAZ_ENABLED
  46
  47 /*
  48  * See crypto/bn/asm/rsaz-avx2.pl for further details.
  49  */
  50 void rsaz_1024_norm2red_avx2(void *red, const void *norm);
  51 void rsaz_1024_mul_avx2(void *ret, const void *a, const void *b,
  52                         const void *n, BN_ULONG k);
  53 void rsaz_1024_sqr_avx2(void *ret, const void *a, const void *n, BN_ULONG k,
  54                         int cnt);
  55 void rsaz_1024_scatter5_avx2(void *tbl, const void *val, int i);
  56 void rsaz_1024_gather5_avx2(void *val, const void *tbl, int i);
  57 void rsaz_1024_red2norm_avx2(void *norm, const void *red);
  58
  59 #if defined(__GNUC__)
  60 # define ALIGN64        __attribute__((aligned(64)))
  61 #elif defined(_MSC_VER)
  62 # define ALIGN64        __declspec(align(64))
  63 #elif defined(__SUNPRO_C)
  64 # define ALIGN64
  65 # pragma align 64(one,two80)
  66 #else
  67 /* not fatal, might hurt performance a little */
  68 # define ALIGN64
  69 #endif
  70
  71 ALIGN64 static const BN_ULONG one[40] = {
  72     1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  73     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  74 };
  75
  76 ALIGN64 static const BN_ULONG two80[40] = {
  77     0, 0, 1 << 22, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  78     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  79 };
  80
  81 void RSAZ_1024_mod_exp_avx2(BN_ULONG result_norm[16],
  82                             const BN_ULONG base_norm[16],
  83                             const BN_ULONG exponent[16],
  84                             const BN_ULONG m_norm[16], const BN_ULONG RR[16],
  85                             BN_ULONG k0)
  86 {
  87     unsigned char storage[320 * 3 + 32 * 9 * 16 + 64]; /* 5.5KB */
  88     unsigned char *p_str = storage + (64 - ((size_t)storage % 64));
  89     unsigned char *a_inv, *m, *result;
  90     unsigned char *table_s = p_str + 320 * 3;
  91     unsigned char *R2 = table_s; /* borrow */
  92     int index;
  93     int wvalue;
  94
  95     if ((((size_t)p_str & 4095) + 320) >> 12) {
  96         result = p_str;
  97         a_inv = p_str + 320;
  98         m = p_str + 320 * 2;    /* should not cross page */
  99     } else {
 100         m = p_str;              /* should not cross page */
 101         result = p_str + 320;
 102         a_inv = p_str + 320 * 2;
 103     }
 104
 105     rsaz_1024_norm2red_avx2(m, m_norm);
 106     rsaz_1024_norm2red_avx2(a_inv, base_norm);
 107     rsaz_1024_norm2red_avx2(R2, RR);
 108
 109     rsaz_1024_mul_avx2(R2, R2, R2, m, k0);
 110     rsaz_1024_mul_avx2(R2, R2, two80, m, k0);
 111
 112     /* table[0] = 1 */
 113     rsaz_1024_mul_avx2(result, R2, one, m, k0);
 114     /* table[1] = a_inv^1 */
 115     rsaz_1024_mul_avx2(a_inv, a_inv, R2, m, k0);
 116
 117     rsaz_1024_scatter5_avx2(table_s, result, 0);
 118     rsaz_1024_scatter5_avx2(table_s, a_inv, 1);
 119
 120     /* table[2] = a_inv^2 */
 121     rsaz_1024_sqr_avx2(result, a_inv, m, k0, 1);
 122     rsaz_1024_scatter5_avx2(table_s, result, 2);
 123 #if 0
 124     /* this is almost 2x smaller and less than 1% slower */
 125     for (index = 3; index < 32; index++) {
 126         rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 127         rsaz_1024_scatter5_avx2(table_s, result, index);
 128     }
 129 #else
 130     /* table[4] = a_inv^4 */
 131     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 132     rsaz_1024_scatter5_avx2(table_s, result, 4);
 133     /* table[8] = a_inv^8 */
 134     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 135     rsaz_1024_scatter5_avx2(table_s, result, 8);
 136     /* table[16] = a_inv^16 */
 137     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 138     rsaz_1024_scatter5_avx2(table_s, result, 16);
 139     /* table[17] = a_inv^17 */
 140     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 141     rsaz_1024_scatter5_avx2(table_s, result, 17);
 142
 143     /* table[3] */
 144     rsaz_1024_gather5_avx2(result, table_s, 2);
 145     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 146     rsaz_1024_scatter5_avx2(table_s, result, 3);
 147     /* table[6] */
 148     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 149     rsaz_1024_scatter5_avx2(table_s, result, 6);
 150     /* table[12] */
 151     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 152     rsaz_1024_scatter5_avx2(table_s, result, 12);
 153     /* table[24] */
 154     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 155     rsaz_1024_scatter5_avx2(table_s, result, 24);
 156     /* table[25] */
 157     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 158     rsaz_1024_scatter5_avx2(table_s, result, 25);
 159
 160     /* table[5] */
 161     rsaz_1024_gather5_avx2(result, table_s, 4);
 162     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 163     rsaz_1024_scatter5_avx2(table_s, result, 5);
 164     /* table[10] */
 165     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 166     rsaz_1024_scatter5_avx2(table_s, result, 10);
 167     /* table[20] */
 168     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 169     rsaz_1024_scatter5_avx2(table_s, result, 20);
 170     /* table[21] */
 171     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 172     rsaz_1024_scatter5_avx2(table_s, result, 21);
 173
 174     /* table[7] */
 175     rsaz_1024_gather5_avx2(result, table_s, 6);
 176     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 177     rsaz_1024_scatter5_avx2(table_s, result, 7);
 178     /* table[14] */
 179     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 180     rsaz_1024_scatter5_avx2(table_s, result, 14);
 181     /* table[28] */
 182     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 183     rsaz_1024_scatter5_avx2(table_s, result, 28);
 184     /* table[29] */
 185     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 186     rsaz_1024_scatter5_avx2(table_s, result, 29);
 187
 188     /* table[9] */
 189     rsaz_1024_gather5_avx2(result, table_s, 8);
 190     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 191     rsaz_1024_scatter5_avx2(table_s, result, 9);
 192     /* table[18] */
 193     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 194     rsaz_1024_scatter5_avx2(table_s, result, 18);
 195     /* table[19] */
 196     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 197     rsaz_1024_scatter5_avx2(table_s, result, 19);
 198
 199     /* table[11] */
 200     rsaz_1024_gather5_avx2(result, table_s, 10);
 201     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 202     rsaz_1024_scatter5_avx2(table_s, result, 11);
 203     /* table[22] */
 204     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 205     rsaz_1024_scatter5_avx2(table_s, result, 22);
 206     /* table[23] */
 207     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 208     rsaz_1024_scatter5_avx2(table_s, result, 23);
 209
 210     /* table[13] */
 211     rsaz_1024_gather5_avx2(result, table_s, 12);
 212     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 213     rsaz_1024_scatter5_avx2(table_s, result, 13);
 214     /* table[26] */
 215     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 216     rsaz_1024_scatter5_avx2(table_s, result, 26);
 217     /* table[27] */
 218     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 219     rsaz_1024_scatter5_avx2(table_s, result, 27);
 220
 221     /* table[15] */
 222     rsaz_1024_gather5_avx2(result, table_s, 14);
 223     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 224     rsaz_1024_scatter5_avx2(table_s, result, 15);
 225     /* table[30] */
 226     rsaz_1024_sqr_avx2(result, result, m, k0, 1);
 227     rsaz_1024_scatter5_avx2(table_s, result, 30);
 228     /* table[31] */
 229     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 230     rsaz_1024_scatter5_avx2(table_s, result, 31);
 231 #endif
 232
 233     /* load first window */
 234     p_str = (unsigned char *)exponent;
 235     wvalue = p_str[127] >> 3;
 236     rsaz_1024_gather5_avx2(result, table_s, wvalue);
 237
 238     index = 1014;
 239
 240     while (index > -1) {        /* loop for the remaining 127 windows */
 241
 242         rsaz_1024_sqr_avx2(result, result, m, k0, 5);
 243
 244         wvalue = *((unsigned short *)&p_str[index / 8]);
 245         wvalue = (wvalue >> (index % 8)) & 31;
 246         index -= 5;
 247
 248         rsaz_1024_gather5_avx2(a_inv, table_s, wvalue); /* borrow a_inv */
 249         rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 250     }
 251
 252     /* square four times */
 253     rsaz_1024_sqr_avx2(result, result, m, k0, 4);
 254
 255     wvalue = p_str[0] & 15;
 256
 257     rsaz_1024_gather5_avx2(a_inv, table_s, wvalue); /* borrow a_inv */
 258     rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
 259
 260     /* from Montgomery */
 261     rsaz_1024_mul_avx2(result, result, one, m, k0);
 262
 263     rsaz_1024_red2norm_avx2(result_norm, result);
 264
 265     OPENSSL_cleanse(storage, sizeof(storage));
 266 }
 267
 268 /*
 269  * See crypto/bn/rsaz-x86_64.pl for further details.
 270  */
 271 void rsaz_512_mul(void *ret, const void *a, const void *b, const void *n,
 272                   BN_ULONG k);
 273 void rsaz_512_mul_scatter4(void *ret, const void *a, const void *n,
 274                            BN_ULONG k, const void *tbl, unsigned int power);
 275 void rsaz_512_mul_gather4(void *ret, const void *a, const void *tbl,
 276                           const void *n, BN_ULONG k, unsigned int power);
 277 void rsaz_512_mul_by_one(void *ret, const void *a, const void *n, BN_ULONG k);
 278 void rsaz_512_sqr(void *ret, const void *a, const void *n, BN_ULONG k,
 279                   int cnt);
 280 void rsaz_512_scatter4(void *tbl, const BN_ULONG *val, int power);
 281 void rsaz_512_gather4(BN_ULONG *val, const void *tbl, int power);
 282
 283 void RSAZ_512_mod_exp(BN_ULONG result[8],
 284                       const BN_ULONG base[8], const BN_ULONG exponent[8],
 285                       const BN_ULONG m[8], BN_ULONG k0, const BN_ULONG RR[8])
 286 {
 287     unsigned char storage[16 * 8 * 8 + 64 * 2 + 64]; /* 1.2KB */
 288     unsigned char *table = storage + (64 - ((size_t)storage % 64));
 289     BN_ULONG *a_inv = (BN_ULONG *)(table + 16 * 8 * 8);
 290     BN_ULONG *temp = (BN_ULONG *)(table + 16 * 8 * 8 + 8 * 8);
 291     unsigned char *p_str = (unsigned char *)exponent;
 292     int index;
 293     unsigned int wvalue;
 294
 295     /* table[0] = 1_inv */
 296     temp[0] = 0 - m[0];
 297     temp[1] = ~m[1];
 298     temp[2] = ~m[2];
 299     temp[3] = ~m[3];
 300     temp[4] = ~m[4];
 301     temp[5] = ~m[5];
 302     temp[6] = ~m[6];
 303     temp[7] = ~m[7];
 304     rsaz_512_scatter4(table, temp, 0);
 305
 306     /* table [1] = a_inv^1 */
 307     rsaz_512_mul(a_inv, base, RR, m, k0);
 308     rsaz_512_scatter4(table, a_inv, 1);
 309
 310     /* table [2] = a_inv^2 */
 311     rsaz_512_sqr(temp, a_inv, m, k0, 1);
 312     rsaz_512_scatter4(table, temp, 2);
 313
 314     for (index = 3; index < 16; index++)
 315         rsaz_512_mul_scatter4(temp, a_inv, m, k0, table, index);
 316
 317     /* load first window */
 318     wvalue = p_str[63];
 319
 320     rsaz_512_gather4(temp, table, wvalue >> 4);
 321     rsaz_512_sqr(temp, temp, m, k0, 4);
 322     rsaz_512_mul_gather4(temp, temp, table, m, k0, wvalue & 0xf);
 323
 324     for (index = 62; index >= 0; index--) {
 325         wvalue = p_str[index];
 326
 327         rsaz_512_sqr(temp, temp, m, k0, 4);
 328         rsaz_512_mul_gather4(temp, temp, table, m, k0, wvalue >> 4);
 329
 330         rsaz_512_sqr(temp, temp, m, k0, 4);
 331         rsaz_512_mul_gather4(temp, temp, table, m, k0, wvalue & 0x0f);
 332     }
 333
 334     /* from Montgomery */
 335     rsaz_512_mul_by_one(result, temp, m, k0);
 336
 337     OPENSSL_cleanse(storage, sizeof(storage));
 338 }
 339
 340 #else
 341
 342 # if defined(PEDANTIC) || defined(__DECC) || defined(__clang__)
 343 static void *dummy = &dummy;
 344 # endif
 345
 346 #endif