* Fix web ssh session with proxy recording mode
The agent was not being propagated when establishing an ssh session
via the web which resulted in the error described in #18850. Providing
the agent was straightforward, however, due to the changes from #18656
when using the forward server, as is required with proxy recording mode,
the ssh connection is now being performed directly over a `net.Pipe`.
Due to the synchronous nature of `net.Pipe` this causes a deadlock when
performing the ssh handshake. To mitigate the deadlocks, `DualPipeNetConn`
was changed to leverage `syscall.Socketpair` instead of `net.Pipe`.
`TestTerminal` now has two cases, one for node recording mode and another
for proxy recording mode. In order for the proxy recording mode test to pass
the fake clock used in the test needed to be properly propagated to the
`ssh.CertChecker` and `forward.ServerConfig`.
Fixes#18850
We were inconsistent throughout the codebase and would sometimes
use the slices package and other times use our own equivalents
in api/.
This removes our versions in favor of the golang.org/x package that
does the same, which has the added benefit of reducing the surface
area of the public API module.
Note: despite existing uses of the slices package, for some reason
it didn't show up in go.mod or go.sum. Fixed that too.
* Ensure invalid tunnel agent connections get closed
Connections from reverse tunnel agents were being marked
as invalid by the proxy under certain conditions but would
ultimately never be closed. This could lead to scenarios where
the agent thought things were fine but the proxy considered
that agent unhealthy and unroutable.
Pruning of invalid connections used to occur when a proxy
tried to retrieve a connection for that tunnel. This also
further muddied the point in time at which the proxy could
close a connection as it never explicitly stopped tracking
the connection and closed it at the same time.
To remedy this, connections are explicitly closed by the proxy
and removed from the mapping to stop tracking immediately. In order
to prevent a connection that is servicing an active connection
from being closed the proxy now tracks which connections have
sessions. Closing does not occur when there are any active
sessions to prevent them from being force terminated.
When the proxy receives a heartbeat from an agent it now restores
the connection to a valid state. In the event that too many heart
beats have been missed for an agent, the proxy will now terminate
the connection, again only if it is not serving any sessions.
Fixes#15911
- When user registers or resets, when running into
policy errors, we don't send back an error, but instead
a 200 (to indicate user has successfully registered/resetted)
and a flag to determine if policy was enabled
- Send back policy configurations for cluster config,
this will allow the web UI login page to just display
redirection messages without login attempts
- For role configured policy, login attempts will be
required and a specific error will be returned so that
the UI can then better redirect the user
* Add Yubikey PrivateKey implementation for use by Teleport clients.
- Add yubikey login logic, reusing previously stored private keys.
- Fix identity file decoding with PIV keys, which sign ecdsa certificates.
- Add libpcsclite-dev pre-req for building on linux.
- Remove unnecessary keys.Signer interface and move its functionality to keys.PrivateKey.
- Move retry and jitter utils to new api/utils/retryutils package.
Update metalinter, fix a few lint warnings and replace deprecated linters.
`deadcode`, `structcheck` and `varcheck` are abandoned and now replaced by [`unused`][1].
Since 1.19, `go fmt` reformats godocs according to https://go.dev/doc/comment. I've done a bulk-reformatting of the codebase to keep the linter happy. Backporting is mostly harmless (the exception being `lib/services/role_test.go`, that for some reason breaks the _old_ linter using the new format).
[1]: https://golangci-lint.run/usage/linters/
* Bump golangci-lint version
* Replace abandoned linters
* Fix bodyclose on lib/auth/github.com
* Fix bodyclose on lib/kube/proxy/streamproto/proto_test.go
* Fix bodyclose on lib/srv/alpnproxy/proxy_test.go
* Fix bodyclose on lib/web/conn_upgrade_test.go
* Silence staticcheck on lib/kube/proxy/forwarder_test.go
* Silence staticcheck on lib/utils/certs_test.go
* Address BuildNameToCertificate deprecation warnings
* Run `go fmt ./...`
* Run `go fmt ./...` on api/
* Ignore formatting in role_test.go
* Remove redundant initializers in lib/srv/uacc/
* Update e/
Primary Changes:
- Remove reliance on Private Key PEM:
- Update native and keygen packages to return PrivateKey instead of PEM key
- Add new PrivateKey interface which implements crypto.Signer
- Replace PEM encoded private key usage where possible
- Replace calls to tls.(Load)X509KeyPair with keys.(Load)X509KeyPair in
client packages
Minor Changes:
- Remove unused agent.AddedKey return from LoadKey
- Simplify sshutils and removed unused code paths
- Add ecdsa and ed25519 key support
* Add additional debug logging for instantiation of ssh server conn
* Rough out introducing mux to ssh listener
* Catch errors from multiplexer serve
* Adapt multiplexer to support ProxyHelloSignature
* Adjust logging for ssh conn creation
* Adjust tests to use semantically correct assert/require helpers
* Address PR comments
* Check Client addr is properly propagated in mux test
* SSH request tracing
Add tracing support for ssh global requests and channels. Wrappers
for `ssh.Client`, `ssh.Channel`, and `ssh.NewChannel` provide a
mechanism for tracing context to be propagated via a `context.Context`.
In order to maintain backwards compatibility the ssh.Client wrapper
tries to open a TracingChannel when constructed. Any servers that
don't support tracing will reject the unknown channel. The client
will only provide tracing context to servers which do NOT reject
the TracingChannel request.
In order to include pass tracing context along all ssh payloads
are wrapped in an Envelope that includes the original payload
AND any tracing context. Servers now try to unmarshal all payloads
into said Envelope when processing messages. If there is an Envelope
provided, a new span will be created and the original payload will
be pass along to handlers.
Part of #12241
* Update api/types/fuzz_test.go
* do not fail if the file is missing
* missing go-118-fuzz-build fix
Co-authored-by: Zac Bergquist <zac.bergquist@goteleport.com>
* Add client side circuit breaker to auth clients
In order to apply back pressure we can utilize a circuit breaker that
monitors error responses from auth server. When tripped it will prevent
all outbound requests to auth for a period of time. This can also help
prevent a potential thundering heard when auth is in an unhealthy state.
By default the circuit breaker will only be tripped if 90% of the
requests made in the monitoring interval fail.
This adds proxy peering support. A configurable setting that allows for agents
to connect to a subset of proxies and be reachable through any proxy in the
cluster. This is achieved by creating grpc connections between each proxy
server. Client connections can then be passed between proxies to the desired
agent.
* Add tracing instrumentation for ssh clients/servers
Add tracing context to the existing ProxyHelloSignature to provide
span information across ssh connections. To add span context per
ssh session on top of new connections, the same tracing context is
passed in the first global request of the session.
In order to ensure that tracing context is pulled from and inserted
into the proper context.Context, some interfaces and methods were
changed to take one as the first argument.
Adds a method to resources MatchSearch, that goes through
select resource field values, and matches it against a list of
user provided search values.
Part of RFD 55
- Ensure that the dial request uses proper "server ID" format,
which is <uuid>.<cluster_name>
- Update reverse tunnel agent to handle tunnel connections
to desktops
Brian Joerger