i2d_ASN1_UTCTIME
int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **out);
LCRYPTO_ALIAS(i2d_ASN1_UTCTIME);
LCRYPTO_USED(i2d_ASN1_UTCTIME);
if ((len = i2d_ASN1_UTCTIME(ut, &p)) <= 0) {