5 BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_abs_is_word, BN_is_odd, BN_are_coprime
6 - BIGNUM comparison and test functions
10 #include <openssl/bn.h>
12 int BN_cmp(const BIGNUM *a, const BIGNUM *b);
13 int BN_ucmp(const BIGNUM *a, const BIGNUM *b);
15 int BN_is_zero(const BIGNUM *a);
16 int BN_is_one(const BIGNUM *a);
17 int BN_is_word(const BIGNUM *a, const BN_ULONG w);
18 int BN_abs_is_word(const BIGNUM *a, const BN_ULONG w);
19 int BN_is_odd(const BIGNUM *a);
21 int BN_are_coprime(BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
25 BN_cmp() compares the numbers I<a> and I<b>. BN_ucmp() compares their
28 BN_is_zero(), BN_is_one(), BN_is_word() and BN_abs_is_word() test if
29 I<a> equals 0, 1, I<w>, or E<verbar>I<w>E<verbar> respectively.
30 BN_is_odd() tests if I<a> is odd.
32 BN_are_coprime() determines if B<a> and B<b> are coprime.
33 B<ctx> is used internally for storing temporary variables.
34 The values of B<a> and B<b> and B<ctx> must not be NULL.
38 BN_cmp() returns -1 if I<a> E<lt> I<b>, 0 if I<a> == I<b> and 1 if
39 I<a> E<gt> I<b>. BN_ucmp() is the same using the absolute values
42 BN_is_zero(), BN_is_one() BN_is_word(), BN_abs_is_word() and
43 BN_is_odd() return 1 if the condition is true, 0 otherwise.
45 BN_are_coprime() returns 1 if the B<BIGNUM>'s are coprime, otherwise it
50 Prior to OpenSSL 1.1.0, BN_is_zero(), BN_is_one(), BN_is_word(),
51 BN_abs_is_word() and BN_is_odd() were macros.
53 The function BN_are_coprime() was added in OpenSSL 3.1.
57 Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
59 Licensed under the Apache License 2.0 (the "License"). You may not use
60 this file except in compliance with the License. You can obtain a copy
61 in the file LICENSE in the source distribution or at
62 L<https://www.openssl.org/source/license.html>.