code: function parse_EncInfoStd(blob) {
  	var flags = blob.read_shift(4);
  	if((flags & 0x3F) != 0x24) throw new Error("EncryptionInfo mismatch");
  	var sz = blob.read_shift(4);
  	//var tgt = blob.l + sz;
  	var hdr = parse_EncryptionHeader(blob, sz);
  	var verifier = parse_EncryptionVerifier(blob, blob.length - blob.l);
  	return { t:"Std", h:hdr, v:verifier };
  }
docs: /* [MS-OFFCRYPTO] 2.3.4.5  EncryptionInfo Stream (Standard Encryption)