[tor-bugs] #21693 [Core Tor/Tor]: prop224: HS descriptors do wasteful double-base64 encoding

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#21693: prop224: HS descriptors do wasteful double-base64 encoding
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 Reporter:  asn              |          Owner:  asn
     Type:  task             |         Status:  assigned
 Priority:  Medium           |      Milestone:  Tor: 0.3.1.x-final
Component:  Core Tor/Tor     |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  tor-hs, prop224  |  Actual Points:
Parent ID:                   |         Points:  4
 Reviewer:                   |        Sponsor:  SponsorR-can
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Comment (by asn):

 WRT the zlib API, I looked at the test `test_buffers_zlib_impl()` and it
 does not seem super hard. It seems to require to require a `buf_t`, the
 use of `write_to_buf_zlib()`, and then extracting the compressed data from
 the `buf_t` into a `uint8_t`. Uncompressing seems even easier, just use
 `tor_gzip_uncompress()`.

 Maybe I should give this a try for the inner layer.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21693#comment:8>
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