3 This file is part of the ARM-Crypto-Lib.
4 Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * \license GPLv3 or later
33 typedef uint8_t bigint_word_t;
34 typedef uint16_t bigint_wordplus_t;
35 typedef int16_t bigint_wordplus_signed_t;
36 #define BIGINT_WORD_SIZE 8
38 #define BIGINT_FBS_MASK (BIGINT_WORD_SIZE-1) /* the last five bits indicate which is the first bit set */
39 #define BIGINT_NEG_MASK 0x80 /* this bit indicates a negative value */
43 bigint_word_t *wordv; /* word vector, pointing to the LSB */
48 /******************************************************************************/
50 void bigint_adjust(bigint_t *a);
51 uint32_t bigint_get_first_set_bit(const bigint_t *a);
52 uint32_t bigint_get_last_set_bit(const bigint_t *a);
53 uint16_t bigint_length_b(const bigint_t *a);
54 uint16_t bigint_length_B(const bigint_t *a);
55 void bigint_copy(bigint_t *dest, const bigint_t *src);
56 void bigint_add_u(bigint_t *dest, const bigint_t *a, const bigint_t *b);
57 void bigint_add_scale_u(bigint_t *dest, const bigint_t *a, uint16_t scale);
58 void bigint_sub_u(bigint_t *dest, const bigint_t *a, const bigint_t *b);
59 int8_t bigint_cmp_u(const bigint_t * a, const bigint_t * b);
60 void bigint_add_s(bigint_t *dest, const bigint_t *a, const bigint_t *b);
61 void bigint_sub_s(bigint_t *dest, const bigint_t *a, const bigint_t *b);
62 int8_t bigint_cmp_s(const bigint_t *a, const bigint_t *b);
63 void bigint_shiftleft(bigint_t *a, uint16_t shift);
64 void bigint_shiftright(bigint_t *a, uint16_t shift);
65 void bigint_xor(bigint_t *dest, const bigint_t *a);
66 void bigint_set_zero(bigint_t *a);
67 void bigint_mul_u(bigint_t *dest, const bigint_t *a, const bigint_t *b);
68 void bigint_mul_s(bigint_t *dest, const bigint_t *a, const bigint_t *b);
69 void bigint_square(bigint_t *dest, const bigint_t *a);
70 void bigint_sub_u_bitscale(bigint_t *a, const bigint_t *b, uint16_t bitscale);
71 void bigint_reduce(bigint_t *a, const bigint_t *r);
72 void bigint_expmod_u(bigint_t *dest, const bigint_t *a, const bigint_t *exp, const bigint_t *r);
73 void bigint_gcdext(bigint_t *gcd, bigint_t *a, bigint_t *b, const bigint_t *x, const bigint_t *y);
74 void bigint_inverse(bigint_t *dest, const bigint_t *a, const bigint_t *m);
75 void bigint_changeendianess(bigint_t *a);
76 /******************************************************************************/