i2d_NETSCAPE_SPKI
LCRYPTO_ALIAS(i2d_NETSCAPE_SPKI);
LCRYPTO_USED(i2d_NETSCAPE_SPKI);
int i2d_NETSCAPE_SPKI(NETSCAPE_SPKI *a, unsigned char **out);
der_len = i2d_NETSCAPE_SPKI(spki, NULL);
i2d_NETSCAPE_SPKI(spki, &p);