BN_SET_NEGATIVE(3)         Library Functions Manual         BN_SET_NEGATIVE(3)

NAME
     BN_set_negative, BN_is_negative - change and inspect the sign of a BIGNUM

SYNOPSIS
     library "libcrypto"
     #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.

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.

Linux 7.0.8-arch1-1              June 8, 2025              Linux 7.0.8-arch1-1