248 lines
7.7 KiB
C
248 lines
7.7 KiB
C
/*
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* Copyright (C) 2017 Denys Vlasenko
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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/* The file is taken almost verbatim from matrixssl-3-7-2b-open/crypto/math/.
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* Changes are flagged with ///bbox
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*/
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/**
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* @file pstm.h
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* @version 33ef80f (HEAD, tag: MATRIXSSL-3-7-2-OPEN, tag: MATRIXSSL-3-7-2-COMM, origin/master, origin/HEAD, master)
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*
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* multiple-precision integer library.
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*/
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/*
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* Copyright (c) 2013-2015 INSIDE Secure Corporation
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* Copyright (c) PeerSec Networks, 2002-2011
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* All Rights Reserved
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*
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* The latest version of this code is available at http://www.matrixssl.org
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*
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* This software is open source; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This General Public License does NOT permit incorporating this software
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* into proprietary programs. If you are unable to comply with the GPL, a
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* commercial license for this software may be purchased from INSIDE at
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* http://www.insidesecure.com/eng/Company/Locations
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*
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* This program is distributed in WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* http://www.gnu.org/copyleft/gpl.html
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*/
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/******************************************************************************/
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#ifndef _h_PSTMATH
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#define _h_PSTMATH
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#ifndef DISABLE_PSTM
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/* Define this here to avoid including circular limits.h on some platforms */
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#ifndef CHAR_BIT
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#define CHAR_BIT 8
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#endif
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/******************************************************************************/
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/*
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If native 64 bit integers are not supported, we do not support 32x32->64
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in hardware, so we must set the 16 bit flag to produce 16x16->32 products.
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*/
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#ifndef HAVE_NATIVE_INT64
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#define PSTM_16BIT
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#endif /* ! HAVE_NATIVE_INT64 */
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/******************************************************************************/
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/*
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Some default configurations.
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pstm_word should be the largest value the processor can hold as the product
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of a multiplication. Most platforms support a 32x32->64 MAC instruction,
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so 64bits is the default pstm_word size.
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pstm_digit should be half the size of pstm_word
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*/
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#ifdef PSTM_8BIT
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/* 8-bit digits, 16-bit word products */
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typedef unsigned char pstm_digit;
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typedef unsigned short pstm_word;
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#define DIGIT_BIT 8
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#elif defined(PSTM_16BIT)
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/* 16-bit digits, 32-bit word products */
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typedef unsigned short pstm_digit;
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typedef unsigned long pstm_word;
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#define DIGIT_BIT 16
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#elif defined(PSTM_64BIT)
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/* 64-bit digits, 128-bit word products */
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#ifndef __GNUC__
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#error "64bit digits requires GCC"
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#endif
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typedef unsigned long pstm_digit;
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typedef unsigned long pstm_word __attribute__ ((mode(TI)));
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#define DIGIT_BIT 64
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#else
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/* This is the default case, 32-bit digits, 64-bit word products */
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typedef uint32 pstm_digit;
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typedef uint64 pstm_word;
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#define DIGIT_BIT 32
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#define PSTM_32BIT
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#endif /* digit and word size */
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#define PSTM_MASK (pstm_digit)(-1)
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#define PSTM_DIGIT_MAX PSTM_MASK
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/******************************************************************************/
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/*
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equalities
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*/
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#define PSTM_LT -1 /* less than */
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#define PSTM_EQ 0 /* equal to */
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#define PSTM_GT 1 /* greater than */
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#define PSTM_ZPOS 0 /* positive integer */
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#define PSTM_NEG 1 /* negative */
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#define PSTM_OKAY PS_SUCCESS
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#define PSTM_MEM PS_MEM_FAIL
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/******************************************************************************/
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/*
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Various build options
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*/
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#define PSTM_DEFAULT_INIT 64 /* default (64) digits of allocation */
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#define PSTM_MAX_SIZE 4096
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typedef struct {
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int16 used, alloc, sign;
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pstm_digit *dp;
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psPool_t *pool;
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} pstm_int;
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/******************************************************************************/
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/*
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Operations on large integers
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*/
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#define pstm_iszero(a) (((a)->used == 0) ? PS_TRUE : PS_FALSE)
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#define pstm_iseven(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 0)) ? PS_TRUE : PS_FALSE)
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#define pstm_isodd(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 1)) ? PS_TRUE : PS_FALSE)
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#define pstm_abs(a, b) { pstm_copy(a, b); (b)->sign = 0; }
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extern void pstm_set(pstm_int *a, pstm_digit b);
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extern void pstm_zero(pstm_int * a);
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extern int32 pstm_init(psPool_t *pool, pstm_int * a);
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extern int32 pstm_init_size(psPool_t *pool, pstm_int * a, uint32 size);
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extern int32 pstm_init_copy(psPool_t *pool, pstm_int * a, pstm_int * b,
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int16 toSqr);
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extern int16 pstm_count_bits (pstm_int * a);
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extern int32 pstm_init_for_read_unsigned_bin(psPool_t *pool, pstm_int *a,
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uint32 len);
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extern int32 pstm_read_unsigned_bin(pstm_int *a, unsigned char *b, int32 c);
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extern int32 pstm_unsigned_bin_size(pstm_int *a);
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extern int32 pstm_copy(pstm_int * a, pstm_int * b);
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extern void pstm_exch(pstm_int * a, pstm_int * b);
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extern void pstm_clear(pstm_int * a);
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extern void pstm_clear_multi(pstm_int *mp0, pstm_int *mp1, pstm_int *mp2,
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pstm_int *mp3, pstm_int *mp4, pstm_int *mp5, pstm_int *mp6,
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pstm_int *mp7);
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extern int32 pstm_grow(pstm_int * a, int16 size);
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extern void pstm_clamp(pstm_int * a);
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extern int32 pstm_cmp(pstm_int * a, pstm_int * b);
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extern int32 pstm_cmp_mag(pstm_int * a, pstm_int * b);
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extern void pstm_rshd(pstm_int *a, int16 x);
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extern int32 pstm_lshd(pstm_int * a, int16 b);
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extern int32 pstm_div(psPool_t *pool, pstm_int *a, pstm_int *b, pstm_int *c,
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pstm_int *d);
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extern int32 pstm_div_2d(psPool_t *pool, pstm_int *a, int16 b, pstm_int *c,
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pstm_int *d);
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extern int32 pstm_div_2(pstm_int * a, pstm_int * b);
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extern int32 s_pstm_sub(pstm_int *a, pstm_int *b, pstm_int *c);
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extern int32 pstm_sub(pstm_int *a, pstm_int *b, pstm_int *c);
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extern int32 pstm_sub_d(psPool_t *pool, pstm_int *a, pstm_digit b, pstm_int *c);
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extern int32 pstm_mul_2(pstm_int * a, pstm_int * b);
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extern int32 pstm_mod(psPool_t *pool, pstm_int *a, pstm_int *b, pstm_int *c);
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extern int32 pstm_mulmod(psPool_t *pool, pstm_int *a, pstm_int *b, pstm_int *c,
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pstm_int *d);
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extern int32 pstm_exptmod(psPool_t *pool, pstm_int *G, pstm_int *X, pstm_int *P,
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pstm_int *Y);
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extern int32 pstm_2expt(pstm_int *a, int16 b);
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extern int32 pstm_add(pstm_int *a, pstm_int *b, pstm_int *c);
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extern int32 pstm_to_unsigned_bin(psPool_t *pool, pstm_int *a,
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unsigned char *b);
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extern int32 pstm_to_unsigned_bin_nr(psPool_t *pool, pstm_int *a,
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unsigned char *b);
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extern int32 pstm_montgomery_setup(pstm_int *a, pstm_digit *rho);
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///bbox: pool unused
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#define pstm_montgomery_reduce(pool, a, m, mp, paD, paDlen) \
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pstm_montgomery_reduce( a, m, mp, paD, paDlen)
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extern int32 pstm_montgomery_reduce(psPool_t *pool, pstm_int *a, pstm_int *m,
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pstm_digit mp, pstm_digit *paD, uint32 paDlen);
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#define pstm_mul_comba(pool, A, B, C, paD, paDlen) \
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pstm_mul_comba( A, B, C, paD, paDlen)
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extern int32 pstm_mul_comba(psPool_t *pool, pstm_int *A, pstm_int *B,
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pstm_int *C, pstm_digit *paD, uint32 paDlen);
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///bbox: pool unused
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#define pstm_sqr_comba(pool, A, B, paD, paDlen) \
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pstm_sqr_comba( A, B, paD, paDlen)
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extern int32 pstm_sqr_comba(psPool_t *pool, pstm_int *A, pstm_int *B,
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pstm_digit *paD, uint32 paDlen);
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extern int32 pstm_cmp_d(pstm_int *a, pstm_digit b);
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extern int32 pstm_montgomery_calc_normalization(pstm_int *a, pstm_int *b);
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extern int32 pstm_mul_d(pstm_int *a, pstm_digit b, pstm_int *c);
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extern int32 pstm_invmod(psPool_t *pool, pstm_int * a, pstm_int * b,
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pstm_int * c);
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#else /* DISABLE_PSTM */
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typedef int32 pstm_int;
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#endif /* !DISABLE_PSTM */
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#endif /* _h_PSTMATH */
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