1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Copyright 2014-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef HEADER_BN_INT_H
# define HEADER_BN_INT_H
# include <openssl/bn.h>
# include <limits.h>
#ifdef __cplusplus
extern "C" {
#endif
BIGNUM *bn_wexpand(BIGNUM *a, int words);
BIGNUM *bn_expand2(BIGNUM *a, int words);
void bn_correct_top(BIGNUM *a);
/*
* Determine the modified width-(w+1) Non-Adjacent Form (wNAF) of 'scalar'.
* This is an array r[] of values that are either zero or odd with an
* absolute value less than 2^w satisfying scalar = \sum_j r[j]*2^j where at
* most one of any w+1 consecutive digits is non-zero with the exception that
* the most significant digit may be only w-1 zeros away from that next
* non-zero digit.
*/
signed char *bn_compute_wNAF(const BIGNUM *scalar, int w, size_t *ret_len);
int bn_get_top(const BIGNUM *a);
void bn_set_top(BIGNUM *a, int top);
int bn_get_dmax(const BIGNUM *a);
/* Set all words to zero */
void bn_set_all_zero(BIGNUM *a);
/*
* Copy the internal BIGNUM words into out which holds size elements (and size
* must be bigger than top)
*/
int bn_copy_words(BN_ULONG *out, const BIGNUM *in, int size);
BN_ULONG *bn_get_words(const BIGNUM *a);
/*
* Set the internal data words in a to point to words which contains size
* elements. The BN_FLG_STATIC_DATA flag is set
*/
void bn_set_static_words(BIGNUM *a, BN_ULONG *words, int size);
/*
* Copy words into the BIGNUM |a|, reallocating space as necessary.
* The negative flag of |a| is not modified.
* Returns 1 on success and 0 on failure.
*/
/*
* |num_words| is int because bn_expand2 takes an int. This is an internal
* function so we simply trust callers not to pass negative values.
*/
int bn_set_words(BIGNUM *a, BN_ULONG *words, int num_words);
size_t bn_sizeof_BIGNUM(void);
/*
* Return element el from an array of BIGNUMs starting at base (required
* because callers do not know the size of BIGNUM at compilation time)
*/
BIGNUM *bn_array_el(BIGNUM *base, int el);
#ifdef __cplusplus
}
#endif
#endif
|
