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 typedef uint16_t bigint_ptr_int_t; /* this must be an integer of the size of a pointer for the target architecture */
37 #define BIGINT_WORD_SIZE 8
39 #define BIGINT_FBS_MASK (BIGINT_WORD_SIZE-1) /* the last five bits indicate which is the first bit set */
40 #define BIGINT_NEG_MASK 0x80 /* this bit indicates a negative value */
44 bigint_word_t *wordv; /* word vector, pointing to the LSB */
49 /******************************************************************************/
51 void bigint_adjust(bigint_t* a);
52 uint32_t bigint_get_first_set_bit(bigint_t* a);
53 uint32_t bigint_get_last_set_bit(bigint_t* a);
54 uint16_t bigint_length_b(bigint_t* a);
55 uint16_t bigint_length_B(bigint_t* a);
56 void bigint_copy(bigint_t* dest, const bigint_t* src);
57 void bigint_add_u(bigint_t* dest, const bigint_t* a, const bigint_t* b);
58 void bigint_add_scale_u(bigint_t* dest, const bigint_t* a, uint16_t scale);
59 void bigint_sub_u(bigint_t* dest, const bigint_t* a, const bigint_t* b);
60 int8_t bigint_cmp_u(const bigint_t * a, const bigint_t * b);
61 void bigint_add_s(bigint_t* dest, const bigint_t* a, const bigint_t* b);
62 void bigint_sub_s(bigint_t* dest, const bigint_t* a, const bigint_t* b);
63 int8_t bigint_cmp_s(const bigint_t* a, const bigint_t* b);
64 void bigint_shiftleft(bigint_t* a, uint16_t shift);
65 void bigint_shiftright(bigint_t* a, uint16_t shift);
66 void bigint_xor(bigint_t* dest, const bigint_t* a);
67 void bigint_set_zero(bigint_t* a);
68 void bigint_mul_u(bigint_t* dest, const bigint_t* a, const bigint_t* b);
69 void bigint_mul_s(bigint_t* dest, const bigint_t* a, const bigint_t* b);
70 void bigint_square(bigint_t* dest, const bigint_t* a);
71 void bigint_sub_u_bitscale(bigint_t* a, const bigint_t* b, uint16_t bitscale);
72 void bigint_reduce(bigint_t* a, const bigint_t* r);
73 void bigint_expmod_u(bigint_t* dest, const bigint_t* a, const bigint_t* exp, const bigint_t* r);
74 void bigint_gcdext(bigint_t* gcd, bigint_t* a, bigint_t* b, const bigint_t* x, const bigint_t* y);
75 void bigint_inverse(bigint_t* dest, const bigint_t* a, const bigint_t* m);
76 void bigint_changeendianess(bigint_t* a);
77 /******************************************************************************/