asn1tag_write
p += asn1tag_write(p, 0x04, kek, keksize);
p += asn1tag_write(p, 0x04, enckey, enckeysize);
p += asn1tag_write(p, 0x04, key, keysize);
p += asn1tag_write(p, 0x04, key, keysize);
p += asn1tag_write(p, 0x04, inbuf, inbufsize);