PEM_write_PrivateKey
LCRYPTO_USED(PEM_write_PrivateKey);
LCRYPTO_ALIAS(PEM_write_PrivateKey);
if (!PEM_write_PrivateKey(f, pkey, NULL, NULL, 0, NULL, NULL)) {
if (!PEM_write_PrivateKey(f, pkey, NULL, NULL, 0, NULL, NULL)) {