BN_swap - exchange BIGNUMs
#include <openssl/bn.h> void BN_swap(BIGNUM *a, BIGNUM *b);
BN_swap() exchanges the values of a and b. bn(3)
BN_swap was added in OpenSSL 0.9.7. 1.0.2t 2019-09-10 BN_swap(3)