NAME¶
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_is_odd - BIGNUM
comparison and test functions
SYNOPSIS¶
#include <openssl/bn.h>
int BN_cmp(BIGNUM *a, BIGNUM *b);
int BN_ucmp(BIGNUM *a, BIGNUM *b);
int BN_is_zero(BIGNUM *a);
int BN_is_one(BIGNUM *a);
int BN_is_word(BIGNUM *a, BN_ULONG w);
int BN_is_odd(BIGNUM *a);
DESCRIPTION¶
BN_cmp() compares the numbers
a and
b.
BN_ucmp()
compares their absolute values.
BN_is_zero(),
BN_is_one() and
BN_is_word() test if
a
equals 0, 1, or
w respectively.
BN_is_odd() tests if a is odd.
BN_is_zero(),
BN_is_one(),
BN_is_word() and
BN_is_odd() are macros.
RETURN VALUES¶
BN_cmp() returns -1 if
a <
b, 0 if
a ==
b
and 1 if
a >
b.
BN_ucmp() is the same using the
absolute values of
a and
b.
BN_is_zero(),
BN_is_one() BN_is_word() and
BN_is_odd() return 1 if the condition is true, 0 otherwise.
SEE ALSO¶
bn(3)
HISTORY¶
BN_cmp(),
BN_ucmp(),
BN_is_zero(),
BN_is_one() and
BN_is_word() are available in all versions of SSLeay and OpenSSL.
BN_is_odd() was added in SSLeay 0.8.