[tor-dev] Cell digest of relay cells destined for hidden services

[Frank Young <pfcodes@xxxxxxxxx>]

The digest of relay cells are running digests [ SHA_final() is never
called ], so the digest of each cell is dependent on the previously
computed digest destined for that node particular node.
Hashing is seeded with values determine by the OR which responded with
CREATED or REALY EXTENDED cell.
I have noticed that, the payload of RELAY_COMMAND_RENDEZVOUS unlike
CREATED OR RELAY EXTENDED cells made no provisions for the seeding
bytes.
This can be referenced in section 1.10 of
https://gitweb.torproject.org/torspec.git?a=blob_plain;hb=HEAD;f=rend-spec.txt
I'm in a state of confusion concerning how the digest of relay cells
destined for hidden services should be computed.
[1] should the digests be independent of previously computed digests
destined for the hidden services?
OR
[2] it should be a running digest but not seeded with any seeding value.

I will like a little clarification on this.

Thanks
_______________________________________________
tor-dev mailing list
tor-dev@xxxxxxxxxxxxxxxxxxxx
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev