5 BN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word - arithmetic
6 functions on BIGNUMs with integers
10 #include <openssl/bn.h>
12 int BN_add_word(BIGNUM *a, BN_ULONG w);
14 int BN_sub_word(BIGNUM *a, BN_ULONG w);
16 int BN_mul_word(BIGNUM *a, BN_ULONG w);
18 BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w);
20 BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w);
24 These functions perform arithmetic operations on BIGNUMs with unsigned
25 integers. They are much more efficient than the normal BIGNUM
26 arithmetic operations.
28 BN_add_word() adds B<w> to B<a> (C<a+=w>).
30 BN_sub_word() subtracts B<w> from B<a> (C<a-=w>).
32 BN_mul_word() multiplies B<a> and B<w> (C<a*=w>).
34 BN_div_word() divides B<a> by B<w> (C<a/=w>) and returns the remainder.
36 BN_mod_word() returns the remainder of B<a> divided by B<w> (C<a%w>).
38 For BN_div_word() and BN_mod_word(), B<w> must not be 0.
42 BN_add_word(), BN_sub_word() and BN_mul_word() return 1 for success, 0
43 on error. The error codes can be obtained by L<ERR_get_error(3)>.
45 BN_mod_word() and BN_div_word() return B<a>%B<w> on success and
46 B<(BN_ULONG)-1> if an error occurred.
50 L<ERR_get_error(3)>, L<BN_add(3)>
54 Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
56 Licensed under the Apache License 2.0 (the "License"). You may not use
57 this file except in compliance with the License. You can obtain a copy
58 in the file LICENSE in the source distribution or at
59 L<https://www.openssl.org/source/license.html>.