ASN1_tag2str
BIO_printf(bio_err, "Can't parse %s type\n", ASN1_tag2str(typ));
tagname = ASN1_tag2str(type);
p = ASN1_tag2str(tag);
pname = ASN1_tag2str(utype);
pname = ASN1_tag2str(utype);
const char *ASN1_tag2str(int tag);