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NAME

BN_set_negative, BN_is_negative — change and inspect the sign of a BIGNUM

SYNOPSIS

#include <openssl/bn.h>

void
BN_set_negative(BIGNUM *b, int n);

int
BN_is_negative(const BIGNUM *b);

DESCRIPTION

BN_set_negative() sets b to negative if both b and n are non-zero, otherwise it sets it to positive.

BN_is_negative() tests the sign of b. It is currently implemented as a macro.

RETURN VALUES

BN_is_negative() returns 1 if b is negative or 0 otherwise.

SEE ALSO

BN_add(3), BN_new(3), BN_set_bit(3), BN_zero(3)

HISTORY

BN_set_negative() and BN_is_negative() first appeared in OpenSSL 0.9.8 and have been available since OpenBSD 4.5.