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- /*****************************************************************************
- * *
- * Copyright (c) 2012, Intel Corporation *
- * *
- * All rights reserved. *
- * *
- * Redistribution and use in source and binary forms, with or without *
- * modification, are permitted provided that the following conditions are *
- * met: *
- * *
- * * Redistributions of source code must retain the above copyright *
- * notice, this list of conditions and the following disclaimer. *
- * *
- * * Redistributions in binary form must reproduce the above copyright *
- * notice, this list of conditions and the following disclaimer in the *
- * documentation and/or other materials provided with the *
- * distribution. *
- * *
- * * Neither the name of the Intel Corporation nor the names of its *
- * contributors may be used to endorse or promote products derived from *
- * this software without specific prior written permission. *
- * *
- * *
- * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION ""AS IS"" AND ANY *
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE *
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR *
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR *
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
- * *
- ******************************************************************************
- * Developers and authors: *
- * Shay Gueron (1, 2), and Vlad Krasnov (1) *
- * (1) Intel Corporation, Israel Development Center, Haifa, Israel *
- * (2) University of Haifa, Israel *
- *****************************************************************************/
-
- #include <openssl/base.h>
-
- #if !defined(OPENSSL_NO_ASM) && defined(OPENSSL_X86_64)
-
- #include "rsaz_exp.h"
-
- #include <openssl/mem.h>
-
- #include "../internal.h"
-
-
- /*
- * See crypto/bn/asm/rsaz-avx2.pl for further details.
- */
- void rsaz_1024_norm2red_avx2(void *red,const void *norm);
- void rsaz_1024_mul_avx2(void *ret,const void *a,const void *b,const void *n,BN_ULONG k);
- void rsaz_1024_sqr_avx2(void *ret,const void *a,const void *n,BN_ULONG k,int cnt);
- void rsaz_1024_scatter5_avx2(void *tbl,const void *val,int i);
- void rsaz_1024_gather5_avx2(void *val,const void *tbl,int i);
- void rsaz_1024_red2norm_avx2(void *norm,const void *red);
-
- alignas(64) static const BN_ULONG one[40] =
- {1,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
- alignas(64) static const BN_ULONG two80[40] =
- {0,0,1<<22,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
-
- void RSAZ_1024_mod_exp_avx2(BN_ULONG result_norm[16],
- const BN_ULONG base_norm[16], const BN_ULONG exponent[16],
- const BN_ULONG m_norm[16], const BN_ULONG RR[16], BN_ULONG k0)
- {
- alignas(64) uint8_t storage[(320 * 3) + (32 * 9 * 16)]; /* 5.5KB */
- unsigned char *a_inv, *m, *result,
- *table_s = storage + (320 * 3),
- *R2 = table_s; /* borrow */
- int index;
- int wvalue;
-
- if (((((uintptr_t)storage & 4095) + 320) >> 12) != 0) {
- result = storage;
- a_inv = storage + 320;
- m = storage + (320 * 2); /* should not cross page */
- } else {
- m = storage; /* should not cross page */
- result = storage + 320;
- a_inv = storage + (320 * 2);
- }
-
- rsaz_1024_norm2red_avx2(m, m_norm);
- rsaz_1024_norm2red_avx2(a_inv, base_norm);
- rsaz_1024_norm2red_avx2(R2, RR);
-
- rsaz_1024_mul_avx2(R2, R2, R2, m, k0);
- rsaz_1024_mul_avx2(R2, R2, two80, m, k0);
-
- /* table[0] = 1 */
- rsaz_1024_mul_avx2(result, R2, one, m, k0);
- /* table[1] = a_inv^1 */
- rsaz_1024_mul_avx2(a_inv, a_inv, R2, m, k0);
-
- rsaz_1024_scatter5_avx2(table_s,result,0);
- rsaz_1024_scatter5_avx2(table_s,a_inv,1);
-
- /* table[2] = a_inv^2 */
- rsaz_1024_sqr_avx2(result, a_inv, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,2);
- #if 0
- /* this is almost 2x smaller and less than 1% slower */
- for (index=3; index<32; index++) {
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,index);
- }
- #else
- /* table[4] = a_inv^4 */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,4);
- /* table[8] = a_inv^8 */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,8);
- /* table[16] = a_inv^16 */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,16);
- /* table[17] = a_inv^17 */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,17);
-
- /* table[3] */
- rsaz_1024_gather5_avx2(result,table_s,2);
- rsaz_1024_mul_avx2(result,result,a_inv,m,k0);
- rsaz_1024_scatter5_avx2(table_s,result,3);
- /* table[6] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,6);
- /* table[12] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,12);
- /* table[24] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,24);
- /* table[25] */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,25);
-
- /* table[5] */
- rsaz_1024_gather5_avx2(result,table_s,4);
- rsaz_1024_mul_avx2(result,result,a_inv,m,k0);
- rsaz_1024_scatter5_avx2(table_s,result,5);
- /* table[10] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,10);
- /* table[20] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,20);
- /* table[21] */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,21);
-
- /* table[7] */
- rsaz_1024_gather5_avx2(result,table_s,6);
- rsaz_1024_mul_avx2(result,result,a_inv,m,k0);
- rsaz_1024_scatter5_avx2(table_s,result,7);
- /* table[14] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,14);
- /* table[28] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,28);
- /* table[29] */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,29);
-
- /* table[9] */
- rsaz_1024_gather5_avx2(result,table_s,8);
- rsaz_1024_mul_avx2(result,result,a_inv,m,k0);
- rsaz_1024_scatter5_avx2(table_s,result,9);
- /* table[18] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,18);
- /* table[19] */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,19);
-
- /* table[11] */
- rsaz_1024_gather5_avx2(result,table_s,10);
- rsaz_1024_mul_avx2(result,result,a_inv,m,k0);
- rsaz_1024_scatter5_avx2(table_s,result,11);
- /* table[22] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,22);
- /* table[23] */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,23);
-
- /* table[13] */
- rsaz_1024_gather5_avx2(result,table_s,12);
- rsaz_1024_mul_avx2(result,result,a_inv,m,k0);
- rsaz_1024_scatter5_avx2(table_s,result,13);
- /* table[26] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,26);
- /* table[27] */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,27);
-
- /* table[15] */
- rsaz_1024_gather5_avx2(result,table_s,14);
- rsaz_1024_mul_avx2(result,result,a_inv,m,k0);
- rsaz_1024_scatter5_avx2(table_s,result,15);
- /* table[30] */
- rsaz_1024_sqr_avx2(result, result, m, k0, 1);
- rsaz_1024_scatter5_avx2(table_s,result,30);
- /* table[31] */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- rsaz_1024_scatter5_avx2(table_s,result,31);
- #endif
-
- const uint8_t *p_str = (const uint8_t *)exponent;
-
- /* load first window */
- wvalue = p_str[127] >> 3;
- rsaz_1024_gather5_avx2(result,table_s,wvalue);
-
- index = 1014;
-
- while(index > -1) { /* loop for the remaining 127 windows */
-
- rsaz_1024_sqr_avx2(result, result, m, k0, 5);
-
- wvalue = *((const unsigned short*)&p_str[index / 8]);
- wvalue = (wvalue>> (index%8)) & 31;
- index-=5;
-
- rsaz_1024_gather5_avx2(a_inv,table_s,wvalue); /* borrow a_inv */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
- }
-
- /* square four times */
- rsaz_1024_sqr_avx2(result, result, m, k0, 4);
-
- wvalue = p_str[0] & 15;
-
- rsaz_1024_gather5_avx2(a_inv,table_s,wvalue); /* borrow a_inv */
- rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
-
- /* from Montgomery */
- rsaz_1024_mul_avx2(result, result, one, m, k0);
-
- rsaz_1024_red2norm_avx2(result_norm, result);
-
- OPENSSL_cleanse(storage,sizeof(storage));
- }
-
- #endif /* OPENSSL_X86_64 */
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