BN_print
BN_print(out, DSA_get0_pub_key(dsa));
BN_print(out, n);
BN_print(out, RSA_get0_n(rsa));
BN_print(STDout, n);
BN_print(STDout, pub_key);
if (!BN_print(out, bn))
ret = BN_print(b, a);
BN_print(out, X);
BN_print(out, Y);
BN_print(out, key);
int BN_print(BIO *fp, const BIGNUM *a);