These errors no longer use Debug to dump the `Option<SourceInfo>`, but
instead produce reasonable text. Also, I've fixed the SourceInfo
Display implementation so that it now says that it got the error
"from $source via $circuit" rather than the other way around.
This is a helper rather than a Display implementation because it
isn't the only logical way to display these values. (In fact,
without context, it isn't even the _most_ logical way)
This is going to make it simpler to write the code in guardmgr (and
later in circmgr) that keeps track of how many relays were rejected
for what reason. The latter, in turn, should improve error messages
when we're unable to pick a guard or a path.
Now each type has a peer. In some cases this peer is just an
address, whereas in others (where key is relevant or address isn't
yet narrowed down) it's a full OwnedChanTarget.
Every error now has an action (what we were trying to do), a
resource (what we were trying to do it to), and a source (what
problem we encountered).
Initially I tried to add "action" and "resource" fields to error
variants individually, but that led to a combinatorial explosion.
Part of #323.
This is behind a feature flag, since it isn't needed for pure
clients: only onion services and relays need this.
I've named the object that constructs these certs
`Ed25519CertConstructor` because it doesn't follow the builder
pattern exactly: mainly because you can't get an Ed25519Cert out of
it. _That_ part is necessary because we require that an Ed25519Cert
should only exist if the certificate was found to be well-signed
with the right public key.
Closes#511.
- arti#448 and arti!607 highlight an issue with upgrading `rsa`: namely,
the `x25519-dalek` version previously used has a hard dependency on
`zeroize` 1.3, which creates a dependency conflict.
- However, `x25519-dalek` version `2.0.0-pre.1` relaxes this dependency.
Reviewing the changelogs, it doesn't look like that version is
substantially different from the current one at all, so it should be
safe to use despite the "prerelease" tag.
- The new `x25519-dalek` version also bumps `rand_core`, which means we
don't have to use the RNG compat wrapper in `tor-llcrypto` as much.
closes arti#448
"Trivial" here includes stuff like cargo reformatting, comment
edits, error message string changes, and clippy warning changes.
Crates that depend on these do not need to increment.
Found these by disabling the nightly dbg macro special case. Now, we
have a mechanism for globally adding suppressions to tests, we can use
that instead.
This will allow us to have add_warning manage test lint blocks.
We have to stop printing all the filenames because there are too
many. Filenames still come out on error of course.