3 * AUTHOR: Rudolf Polzer - divVerent@xonotic.org
5 * Copyright (c) 2010, Rudolf Polzer
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the copyright holder nor the names of contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #ifndef __D0_BIGNUM_H__
37 #define __D0_BIGNUM_H__
42 typedef struct d0_bignum_s d0_bignum_t;
44 D0_WARN_UNUSED_RESULT D0_BOOL d0_iobuf_write_bignum(d0_iobuf_t *buf, const d0_bignum_t *bignum); // byte 0: 01=+ 11=- 00=0, rest = big endian number
45 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_iobuf_read_bignum(d0_iobuf_t *buf, d0_bignum_t *bignum);
46 D0_WARN_UNUSED_RESULT ssize_t d0_bignum_export_unsigned(const d0_bignum_t *bignum, void *buf, size_t bufsize); // big endian, return value = number of significant bytes (or -1 on error)
47 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_import_unsigned(d0_bignum_t *bignum, const void *buf, size_t bufsize);
49 D0_WARN_UNUSED_RESULT D0_BOOL d0_bignum_INITIALIZE(void);
50 void d0_bignum_SHUTDOWN(void);
52 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_new(void);
53 void d0_bignum_free(d0_bignum_t *a);
54 void d0_bignum_init(d0_bignum_t *b);
55 void d0_bignum_clear(d0_bignum_t *a);
56 D0_WARN_UNUSED_RESULT size_t d0_bignum_size(const d0_bignum_t *r);
57 D0_WARN_UNUSED_RESULT int d0_bignum_cmp(const d0_bignum_t *a, const d0_bignum_t *b);
58 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_rand_range(d0_bignum_t *r, const d0_bignum_t *min, const d0_bignum_t *max);
59 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_rand_bit_atmost(d0_bignum_t *r, size_t n);
60 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_rand_bit_exact(d0_bignum_t *r, size_t n);
61 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_zero(d0_bignum_t *r);
62 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_one(d0_bignum_t *r);
63 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_int(d0_bignum_t *r, int n);
64 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_mov(d0_bignum_t *r, const d0_bignum_t *a);
65 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_neg(d0_bignum_t *r, const d0_bignum_t *a);
66 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_shl(d0_bignum_t *r, const d0_bignum_t *a, ssize_t n);
67 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_add(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b);
68 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_sub(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b);
69 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_mul(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b);
70 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_divmod(d0_bignum_t *q, d0_bignum_t *m, const d0_bignum_t *a, const d0_bignum_t *b); // only do mod if both are NULL
71 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_mod_add(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b, const d0_bignum_t *m);
72 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_mod_sub(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b, const d0_bignum_t *m);
73 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_mod_mul(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b, const d0_bignum_t *m);
74 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_mod_pow(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b, const d0_bignum_t *m);
75 D0_WARN_UNUSED_RESULT D0_BOOL d0_bignum_mod_inv(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *m);
76 D0_WARN_UNUSED_RESULT int d0_bignum_isprime(const d0_bignum_t *r, int param);
77 D0_WARN_UNUSED_RESULT d0_bignum_t *d0_bignum_gcd(d0_bignum_t *r, d0_bignum_t *s, d0_bignum_t *t, const d0_bignum_t *a, const d0_bignum_t *b);
79 D0_WARN_UNUSED_RESULT char *d0_bignum_tostring(const d0_bignum_t *x, unsigned int base); // allocates!