/usr/man2/cat.3/BN_one.3.Z(/usr/man2/cat.3/BN_one.3.Z)
NAME
BN_zero, BN_one, BN_value_one, BN_set_word, BN_get_word - BIGNUM
assignment operations
SYNOPSIS
#include <openssl/bn.h>
int BN_zero(BIGNUM *a);
int BN_one(BIGNUM *a);
const BIGNUM *BN_value_one(void);
int BN_set_word(BIGNUM *a, BN_ULONG w);
BN_ULONG BN_get_word(BIGNUM *a);
DESCRIPTION
BN_ULONG is a macro that will be an unsigned integral type optimied for
the most efficient implementation on the local platform.
BN_zero(), BN_one() and BN_set_word() set a to the values 0, 1 and w
respectively. BN_zero() and BN_one() are macros.
BN_value_one() returns a BIGNUM constant of value 1. This constant is
useful for use in comparisons and assignment.
BN_get_word() returns a, if it can be represented as a BN_ULONG.
RETURN VALUES
BN_get_word() returns the value a, or all-bits-set if a cannot be rep-
resented as a BN_ULONG.
BN_zero(), BN_one() and BN_set_word() return 1 on success, 0 otherwise.
BN_value_one() returns the constant.
BUGS
If a BIGNUM is equal to the value of all-bits-set, it will collide with
the error condition returned by BN_get_word() which uses that as an
error value.
BN_ULONG should probably be a typedef.
SEE ALSO
bn(3), BN_bn2bin(3)
HISTORY
BN_zero(), BN_one() and BN_set_word() are available in all versions of
SSLeay and OpenSSL. BN_value_one() and BN_get_word() were added in
SSLeay 0.8.
BN_value_one() was changed to return a true const BIGNUM * in OpenSSL
0.9.7.
1.0.2t 2019-09-10 BN_zero(3)
See also BN_get_word(3)
See also BN_set_word(3)
See also BN_value_one(3)
See also BN_zero(3)
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