* Redo API client locking
This assigns local values when in critical paths, allowing a single API
client to much more quickly and safely pipeline requests.
Additionally, in order to take that paradigm all the way it changes how
timeouts are set. It now uses a context value set on the request instead
of configuring the timeout in the http client per request, which was
also potentially quite racy.
Trivially tested with
VAULT_CLIENT_TIMEOUT=2 vault write pki/root/generate/internal key_type=rsa key_bits=8192
This takes place in two parts, since working on this exposed an issue
with response wrapping when there is a raw body set. The changes are (in
diff order):
* A CurrentWrappingLookupFunc has been added to return the current
value. This is necessary for the lookahead call since we don't want the
lookahead call to be wrapped.
* Support for unwrapping < 0.6.2 tokens via the API/CLI has been
removed, because we now have backends returning 404s with data and can't
rely on the 404 trick. These can still be read manually via
cubbyhole/response.
* KV preflight version request now ensures that its calls is not
wrapped, and restores any given function after.
* When responding with a raw body, instead of always base64-decoding a
string value and erroring on failure, on failure we assume that it
simply wasn't a base64-encoded value and use it as is.
* A test that fails on master and works now that ensures that raw body
responses that are wrapped and then unwrapped return the expected
values.
* A flag for response data that indicates to the wrapping handling that
the data contained therein is already JSON decoded (more later).
* RespondWithStatusCode now defaults to a string so that the value is
HMAC'd during audit. The function always JSON encodes the body, so
before now it was always returning []byte which would skip HMACing. We
don't know what's in the data, so this is a "better safe than sorry"
issue. If different behavior is needed, backends can always manually
populate the data instead of relying on the helper function.
* We now check unwrapped data after unwrapping to see if there were raw
flags. If so, we try to detect whether the value can be unbase64'd. The
reason is that if it can it was probably originally a []byte and
shouldn't be audit HMAC'd; if not, it was probably originally a string
and should be. In either case, we then set the value as the raw body and
hit the flag indicating that it's already been JSON decoded so not to
try again before auditing. Doing it this way ensures the right typing.
* There is now a check to see if the data coming from unwrapping is
already JSON decoded and if so the decoding is skipped before setting
the audit response.
* Redo the API client quite a bit to make the behavior of NewClient more
predictable and add locking to make it safer to use with Clone() and if
multiple goroutines for some reason decide to change things.
Along the way I discovered that currently, the x/net/http2 package is
broke with the built-in h2 support in released Go. For those using
DefaultConfig (the vast majority of cases) this will be a non-event.
Others can manually call http2.ConfigureTransport as needed. We should
keep an eye on commits on that repo and consider more updates before
release. Alternately we could go back revisions but miss out on bug
fixes; my theory is that this is not a purposeful break and I'll be
following up on this in the Go issue tracker.
In a few tests that don't use NewTestCluster, either for legacy or other
reasons, ensure that http2.ConfigureTransport is called.
* Use tls config cloning
* Don't http2.ConfigureServer anymore as current Go seems to work properly without requiring the http2 package
* Address feedback
* Set number of pester retries to zero by default and make seal command return 403 if unauthorized instead of 500
* Fix build
* Use 403 instead and update test
* Change another 500 to 403
This should help with transient issues. Full control over min/max delays
and number of retries (and ability to turn off) is provided in the API
and via env vars.
Fix tests.
Jeff Mitchell