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Re: [tor-bugs] #20991 [Core Tor/Tor]: hs: Move end_sig_fields field of ESTABLISH_INTRO v3 cell before sig_len
#20991: hs: Move end_sig_fields field of ESTABLISH_INTRO v3 cell before sig_len
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Reporter: dgoulet | Owner: dgoulet
Type: defect | Status: accepted
Priority: Medium | Milestone: Tor: 0.3.0.x-final
Component: Core Tor/Tor | Version:
Severity: Normal | Resolution:
Keywords: tor-hs, prop224 | Actual Points:
Parent ID: #17241 | Points:
Reviewer: | Sponsor: SponsorR-must
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Comment (by nickm):
The signature length IMO _needs_ to be unauthenticated, or we'll never be
able to support another signature method with variable-length keys.
Imagine if we were doing this with RSA instead of Ed25519: If we had to
authenticate the signature length, we couldn't actually sign anything
reliably, since we wouldn't know the signature length for sure until we
had made the signature.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20991#comment:5>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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