I mistakenly believed that Noise handshakes are simultaneous. In fact, the
Responder waits until it sees the Initiator's handshake before sending its
own. I had to update the Connection state machines to work this way (the
Record machine now has set_role_leader and set_role_follower), and update the
tests to match.
For debugging I added a `_role` property to Record, but it should probably be
removed.
only install 'noiseprotocol' (which is necessary for dilation to work) if the
"dilate" feature is requested (e.g. `pip install magic-wormhole[dilate]`)
test_ipaddrs.py had an invalid regexp, caught by the latest version of flake8
The new flake8 complains about both W503 (line break inside a conditional
before a binary operator) and W504 (line break *after* the operator). I think
break-before is the new preferred style, but for now I'm just going to ignore
them both and leave the code alone.
This establishes what our mailbox protocol does to encrypt the
individual (post-SPAKE2) messages, which combines NaCl SecretBox and our own
key-derivation choices. I'd like to move off of NaCl/libsodium and I think
some RFC7539-implementing library might be compatible, and with these test
vectors I can check that. I also want to copy these tests into the Rust port.
See https://bugs.python.org/issue26175 . tempfile.SpooledTemporaryFile
doesn't fully implement the IOBase abstract class, which breaks because
py3.7.0's new zipfile module tries to delegate .seekable down to the wrapped
file and causes an AttributeError.
refs #306
The flake8 config excludes E741, which would complain about using
'l' (lower-case ell) as a variable name. We use this for the Lister object in
one test that uses single-character variable names for all the machines ('b'
for Boss, 'm' for Mailbox, etc). That comment was added before excluding
E741. If we ever restore that warning, we might want to rename the variable.
We care about how long it takes to import all the wormhole-specific things,
to investigate user-perceived latency from the time the command is launched
to the time they can actually interact with it. So we need to record
`time.time()` before doing the rest of the imports, even though pep8 says all
imports should be done before any non-importing statements.
