Motivation:
Some version of openssl dont support the needed APIs to use a KeyManagerFactory. In this case we should skip the tests.
Modifications:
- Use assumeTrue(...) to skip tests that need a KeyManagerFactory and its not supported.
Result:
Tests pass on all openssl versions we support.
Motivation:
tcnative was moved into an internal package.
Modifications:
Update package for tcnative imports.
Result:
Use correct package names for tcnative.
Motivation:
We need to pass special arguments to run with jdk9 as otherwise some tests will not be able to run.
Modifications:
Allow to define extra arguments when running with jdk9
Result:
Tests pass with jdk9
Motivation:
If the OpenSslEngine has bytes pending in the non-application buffer and also generates wrapped data during the handshake then the handshake data will be missed. This will lead to a handshake stall and eventually timeout. This can occur if the non-application buffer becomes full due to a large certificate/hello message.
Modification:
- ReferenceCountedOpenSslEngine should not assume if no data is flushed from the non-application buffer that no data will be produced by the handshake.
Result:
New unit tests with larger certificate chains don't fail.
Motivation:
OpenSslEngineTest has unused imports and SSLEngineTest uses a fixed port which was used for debugging.
Modifications:
- Remove unused imports
- Use ephemeral port
Result:
Cleaner test code.
Modifications:
tcnative made some fixes and API changes related to setVerify. We should absorb these changes in Netty.
Modifications:
- Use tcnatives updated APIs
- Add unit tests to demonstrate correct behavior
Result:
Updated to latest tcnative code and more unit tests to verify expected behavior.
Motivation:
tcnative has updated how constants are defined and removed some constants which are either obsolete or now set directly in tcnative.
Modifications:
- update to compile against tcnative changes.
Result:
Netty compiles with tcnative options changes.
Motivation:
We should remove the restriction to only allow to call unwrap with a ByteBuffer[] whose cumulative length exceeds MAX_ENCRYPTED_PACKET_LENGTH.
Modifications:
Remove guard.
Result:
Fixes [#6335].
Motivation:
There were some warnings for the code in the ssl package.
Modifications:
- Remove not needed else blocks
- Use correctly base class for static usage
- Replace String.length() == 0 with String.isEmpty()
- Remove unused code
Result:
Less warnings and cleaner code.
Motivation:
CipherSuiteConverter may throw a NPE if a cipher suite from OpenSSL does not match the precomputed regular expression for OpenSSL ciphers. This method shouldn't throw and instead just return null.
Modifications:
- if cacheFromOpenSsl(..) fails the conversion toJava should return null
Result:
Fixes https://github.com/netty/netty/issues/6336.
Motivation:
Currently Netty utilizes BIO_new_bio_pair so we can control all FD lifetime and event notification but delegates to OpenSSL for encryption/decryption. The current implementation sets up a pair of BIO buffers to read/write encrypted/plaintext data. This approach requires copying of data from Java ByteBuffers to native memory BIO buffers, and also requires both BIO buffers to be sufficiently large to hold application data. If direct ByteBuffers are used we can avoid coyping to/from the intermediate BIO buffer and just read/write directly from the direct ByteBuffer memory. We still need an internal buffer because OpenSSL may generate write data as a result of read calls (e.g. handshake, alerts, renegotiation, etc..), but this buffer doesn't have to be be large enough to hold application data.
Modifications:
- Take advantage of the new ByteBuffer based BIO provided by netty-tcnative instead of using BIO_read and BIO_write.
Result:
Less copying and lower memory footprint requirement per TLS connection.
Motivation:
The SSLEngine wrap and unwrap methods can be called in a way that has no side effects, but this could involve costly validation and allocation. The SslHandler should avoid calling into these methods if possible.
Modifications:
- wrapNonAppData should provide additional status which can be used by wrap to breakout early if possible
Result:
SslHandler invokes the SSLEngine less.
Motivation:
We used various mocking frameworks. We should only use one...
Modifications:
Make usage of mocking framework consistent by only using Mockito.
Result:
Less dependencies and more consistent mocking usage.
Motiviation:
We should ensure we not need any extra wrap / unwrap calls during handshake once the handshake was signaled as finished
Modifications:
More strict testing
Result:
Better testing of handshake behaviour
Motivation:
Previous versions of netty-tcnative used the org.apache.tomcat namespace which could lead to problems when a user tried to use tomcat and netty in the same app.
Modifications:
Use netty-tcnative which now uses a different namespace and adjust code to some API changes.
Result:
Its now possible to use netty-tcnative even when running together with tomcat.
Motivation:
Tests were added in 91f050d2ef to run with different protocols / ciphers. These may fail currently when openssl was compiled without support for the protocol / ciphers.
Modifications:
- Refactor tests to easier understand for which protocol / cipher it failed
- Not fail the test if the protocol is not supported with the used openssl version.
Result:
More robust testing.
Motivation:
We failed to properly test if a protocol is supported on an OpenSSL installation and just always returned all protocols.
Modifications:
- Detect which protocols are supported on a platform.
- Skip protocols in tests when not supported. This fixes a build error on some platforms introduced by [#6276].
Result:
Correctly return only the supported protocols
Motivation:
We used ca 2k as maximum overhead for encrypted packets which is a lot more then what is needed in reality by OpenSSL. This could lead to the need of more memory.
Modification:
- Use a lower overhead of 86 bytes as defined by the spec and openssl itself
- Fix unit test to use the correct session to calculate needed buffer size
Result:
Less memory usage.
Motivation:
We should test that we correctly return BUFFER_UNDERFLOW if the src buffer not contains enough data to unwrap it.
Modification:
Add unit test to verify behaviour.
Result:
Better test coverrage of SSLEngine implementations.
Motivation:
SslHandler closed the channel as soon as it was able to write out the close_notify message. This may not be what the user want as it may make sense to only close it after the actual response to the close_notify was received in order to guarantee a clean-shutdown of the connection in all cases.
Beside this closeNotifyFlushTimeoutMillis is volatile so may change between two reads. We need to cache it in a local variable to ensure it not change int between. Beside this we also need to check if the flush promise was complete the schedule timeout as this may happened but we were not able to cancel the timeout yet. Otherwise we will produce an missleading log message.
Modifications:
- Add new setter / getter to SslHandler which allows to specify the behavior (old behavior is preserved as default)
- Added unit test.
- Cache volatile closeNotifyTimeoutMillis.
- Correctly check if flush promise was complete before we try to forcibly close the Channel and log a warning.
- Add missing javadocs.
Result:
More clean shutdown of connection possible when using SSL and fix racy way of schedule close_notify flush timeouts and javadocs.
Motivation:
PR [#6238] added guards to be able to call wrap(...) / unwrap(...) after the engine was shutdown. Unfortunally one case was missed which is when closeOutbound() was called and produced some data while closeInbound() was not called yet.
Modifications:
Correctly guard against SSLException when closeOutbound() was called, produced data and someone calls wrap(...) after it.
Result:
No more SSLException. Fixes [#6260].
Motivation:
SslHandler has multiple methods which have better replacements now or are obsolete. We should mark these as `@Deprecated`.
Modifications:
Mark methods as deprecated.
Result:
API cleanup preparation.
Motivation:
In commit fc3c9c9523 I changes the way how we calculate the capacity of the needed ByteBuf for wrap operations that happen during writes when the SslHandler is used. This had the effect that the same capacity for ByteBufs is needed for the JDK implementation of SSLEngine but also for our SSLEngine implementation that uses OpenSSL / BoringSSL / LibreSSL. Unfortunally this had the side-effect that applications that used our SSLEngine implementation now need a lot more memory as bascially the JDK implementation always needs a 16kb buffer for each wrap while we can do a lot better for our SSLEngine implementation.
Modification:
- Resurrect code that calculate a better ByteBuf capacity when using our SSLEngine implementation and so be able to safe a lot of memory
- Add test-case to ensure it works as expected and is not removed again later on.
Result:
Memory footprint of applications that uses our SSLEngine implementation based on OpenSSL / BoringSSL / LibreSSL is back to the same amount of before commit fc3c9c9523.
Motivation:
Currently Netty does not wrap socket connect, bind, or accept
operations in doPrivileged blocks. Nor does it wrap cases where a dns
lookup might happen.
This prevents an application utilizing the SecurityManager from
isolating SocketPermissions to Netty.
Modifications:
I have introduced a class (SocketUtils) that wraps operations
requiring SocketPermissions in doPrivileged blocks.
Result:
A user of Netty can grant SocketPermissions explicitly to the Netty
jar, without granting it to the rest of their application.
Motivation:
As we use different execution path in our SSLEngine implementation depending on if heap, direct or mixed buffers are used we should run the tests with all of them.
Modification:
Ensure we run all tests with different buffer types.
Result:
Better test-coverage
Motivation:
For the completion of a handshake we already fire a SslHandshakeCompletionEvent which the user can intercept. We should do the same for the receiving of close_notify.
Modifications:
Add SslCloseCompletionEvent and test-case.
Result:
More consistent API.
Motivation:
https://github.com/netty/netty/pull/6042 only addressed PlatformDependent#getSystemClassLoader but getClassLoader is also called in an optional manner in some common code paths but fails to catch a general enough exception to continue working.
Modifications:
- Calls to getClassLoader which can continue if results fail should catch Throwable
Result:
More resilient code in the presense of restrictive class loaders.
Fixes https://github.com/netty/netty/issues/6246.
Motivation:
The SslHandler.sslCloseFuture() may not be notified when the Channel is closed before a closify_notify is received.
Modifications:
Ensure we try to fail the sslCloseFuture() when the Channel is closed.
Result:
Correctly notify the ssl close future.
Motivation:
The JDK implementation of SSLEngine allows to have unwrap(...) / wrap(...) called even after closeInbound() and closeOutbound() were called. We need to support the same in ReferenceCountedSslEngine.
Modification:
- Allow calling ReferenceCountedSslEngine.unwrap(...) / wrap(...) after the engine was closed
- Modify unit test to ensure correct behaviour.
Result:
Implementation works as expected.
Motivation:
fc3c9c9523 introduced a bug which will have ReferenceCountedSslEngine.unwrap(...) produce an IOOBE when be called with an BŷteBuffer as src that contains multiple SSLRecords and has a position != 0.
Modification:
- Correctly set the limit on the ByteBuffer and so fix the IOOBE.
- Add test-case to verify the fix
Result:
Correctly handle heap buffers as well.
Motivation:
Openssl provider should behave same as JDK provider when mutual authentication is required and a specific set of trusted Certificate Authorities are specified. The SSL handshake should return back to the connected peer the same list of configured Certificate Authorities.
Modifications:
Correctly set the CA list.
Result:
Correct and same behaviour as the JDK implementation.
Motivation:
We need to ensure we not swallow the close_notify that should be send back to the remote peer. See [#6167]
Modifications:
- Only call shutdown() in closeInbound() if there is nothing pending that should be send back to the remote peer.
- Return the correct HandshakeStatus when the close_notify was received.
- Only shutdown() when close_notify was received after closeOutbound() was called.
Result:
close_notify is correctly send back to the remote peer and handled when received.
Motivation
The IdleStateHandler tracks write() idleness on message granularity but does not take into consideration that the client may be just slow and has managed to consume a subset of the message's bytes in the configured period of time.
Modifications
Adding an optional configuration parameter to IdleStateHandler which tells it to observe ChannelOutboundBuffer's state.
Result
Fixes https://github.com/netty/netty/issues/6150
Motivation:
Our ReferenceCountedOpenSslEngine does not support compression so we should explicit disable it.
This is related to #3722.
Modifications:
Set SSL_OP_NO_COMPRESSION option.
Result:
Not use compression.
Motivation:
In later Java8 versions our Atomic*FieldUpdater are slower then the JDK implementations so we should not use ours anymore. Even worse the JDK implementations provide for example an optimized version of addAndGet(...) using intrinsics which makes it a lot faster for this use-case.
Modifications:
- Remove methods that return our own Atomic*FieldUpdaters.
- Use the JDK implementations everywhere.
Result:
Faster code.
Motivation:
We need to ensure we handle the case when BUFFER_OVERFLOW happens during unwrap but the readable bytes are bigger then the expected applicationBufferSize. Otherwise we may produce an IllegalArgumentException as we will try to allocate a buffer with capacity < 0.
Modifications:
- Guard against this case.
- Ensure we not double release buffer on exception when doing unwrap.
Result:
No more exception when running testsuite with java 9.
Motivation:
boringssl uses different messages for the ssl alerts which are all uppercase. As we try to match case as well this fails in SSLErrorTest as we expect lower-case.
This test was introduced by 9b7fb2f362.
Modifications:
Ensure we first translate everything to lower-case before doing the assert.
Result:
SSLErrorTest also pass when boringssl is used.
Motivation:
We need to ensure the tracked object can not be GC'ed before ResourceLeak.close() is called as otherwise we may get false-positives reported by the ResourceLeakDetector. This can happen as the JIT / GC may be able to figure out that we do not need the tracked object anymore and so already enqueue it for collection before we actually get a chance to close the enclosing ResourceLeak.
Modifications:
- Add ResourceLeakTracker and deprecate the old ResourceLeak
- Fix some javadocs to correctly release buffers.
- Add a unit test for ResourceLeakDetector that shows that ResourceLeakTracker has not the problems.
Result:
No more false-positives reported by ResourceLeakDetector when ResourceLeakDetector.track(...) is used.
Motivation:
We need to ensure we not call handshake() when the engine is already closed. Beside this our implementation of isOutboundDone() was not correct as it not took the pending data in the outbound buffer into acount (which may be also generated as part of an ssl alert). Beside this we also called SSL_shutdown(...) while we were still in init state which will produce an error and so noise in the log with openssl later versions.
This is also in some extend related to #5931 .
Modifications:
- Ensure we not call handshake() when already closed
- Correctly implement isOutboundDone()
- Not call SSL_shutdown(...) when still in init state
- Added test-cases
Result:
More correct behaviour of our openssl SSLEngine implementation.
Motivation:
When non SSL data is passed into SSLEngine.unwrap(...) we need to throw an SSLException. This was not done at the moment. Even worse we threw an IllegalArgumentException as we tried to allocate a direct buffer with capacity of -1.
Modifications:
- Guard against non SSL data and added an unit test.
- Make code more consistent
Result:
Correct behaving SSLEngine implementation.
Motivation:
Java9 will be released soon so we should ensure we can compile netty with Java9 and run all our tests. This will help to make sure Netty will be usable with Java9.
Modification:
- Add some workarounds to be able to compile with Java9, note that the full profile is not supported with Java9 atm.
- Remove some usage of internal APIs to be able to compile on java9
- Not support Alpn / Npn and so not run the tests when using Java9 for now. We will do a follow up PR to add support.
Result:
Its possible to build netty and run its testsuite with Java9.
Motivation:
It's important that we do not pass in the original ChannelPromise to safeClose(...) as when flush(...) will throw an Exception it will be propagated to the AbstractChannelHandlerContext which will try to fail the promise because of this. This will then fail as it was already completed by safeClose(...).
Modifications:
Create a new ChannelPromise and pass it to safeClose(...).
Result:
No more confusing logs because of failing to fail the promise.
Motivation:
We are now more careful to flush alerts that are generated when errors occur. We should also be more careful in unit tests to release any buffers that may be queued due to potential errors wich result in alerts.
Modifications:
- When SslHandlerTest uses EmbeddedChannel we should always call finishAndReleaseAll
Results:
Fixes https://github.com/netty/netty/issues/6057
Motivation:
When the SslHandler.unwrap(...) (which is called via decode(...)) method did produce an SSLException it was possible that the produced alert was not send to the remote peer. This could lead to staling connections if the remote peer did wait for such an alert and the connection was not closed.
Modifications:
- Ensure we try to flush any pending data when a SSLException is thrown during unwrapping.
- Fix SniHandlerTest to correct test this
- Add explicit new test in SslHandlerTest to verify behaviour with all SslProviders.
Result:
The alert is correctly send to the remote peer in all cases.
Motivation:
We tried to detect the correct alert to use depending on the CertificateException that is thrown by the TrustManager. This not worked all the time as depending on the TrustManager implementation it may also wrap a CertPathValidatorException.
Modification:
- Try to unwrap the CertificateException if needed and detect the right alert via the CertPathValidatorException.
- Add unit to verify
Result:
Send the correct alert depending on the CertificateException when using OpenSslEngine.
Motiviation:
We used ReferenceCountUtil.releaseLater(...) in our tests which simplifies a bit the releasing of ReferenceCounted objects. The problem with this is that while it simplifies stuff it increase memory usage a lot as memory may not be freed up in a timely manner.
Modifications:
- Deprecate releaseLater(...)
- Remove usage of releaseLater(...) in tests.
Result:
Less memory needed to build netty while running the tests.
Motivation:
In preparation for support of Conscrypt, I'm consolidating all of the engine-specific details so that it's easier to add new engine types that affect the behavior of SslHandler.
Modifications:
Added an enum SslEngineType that provides SSL engine-specific details.
Result:
SslHandler is more extensible for other engine types.
Motivation:
The SniHandlerTest.testServerNameParsing did fail when SslProvider.JDK was used as it the JDK SSLEngineImpl does not send an alert.
Modifications:
Ensure tests pass with JDK and OPENSSL ssl implementations.
Result:
SniHandlerTest will run with all SslProvider and not fail when SslProvider.JDK is used.
Motiviation:
We need to ensure we only consume as much da as we can maximal put in one ssl record to not produce a BUFFER_OVERFLOW when calling wrap(...).
Modification:
- Limit the amount of data that we consume based on the maximal plain text size that can be put in one ssl record
- Add testcase to verify the fix
- Tighten up testcases to ensure the amount of produced and consumed data in SslEngineResult matches the buffers. If not the tests will fail now.
Result:
Correct and conform behavior of OpenSslEngine.wrap(...) and better test coverage during handshaking in general.
Motivation:
Netty provides a adaptor from ByteBuf to Java's InputStream interface. The JDK Stream interfaces have an explicit lifetime because they implement the Closable interface. This lifetime may be differnt than the ByteBuf which is wrapped, and controlled by the interface which accepts the JDK Stream. However Netty's ByteBufInputStream currently does not take reference count ownership of the underlying ByteBuf. There may be no way for existing classes which only accept the InputStream interface to communicate when they are done with the stream, other than calling close(). This means that when the stream is closed it may be appropriate to release the underlying ByteBuf, as the ownership of the underlying ByteBuf resource may be transferred to the Java Stream.
Motivation:
- ByteBufInputStream.close() supports taking reference count ownership of the underyling ByteBuf
Result:
ByteBufInputStream can assume reference count ownership so the underlying ByteBuf can be cleaned up when the stream is closed.
Motivation:
OpenSslEngine.wrap(...) and OpenSslEngie.unwrap(...) may consume bytes even if an BUFFER_OVERFLOW / BUFFER_UNDERFLOW is detected. This is not correct as it should only consume bytes if it can process them without storing data between unwrap(...) / wrap(...) calls. Beside this it also should only process one record at a time.
Modifications:
- Correctly detect BUFFER_OVERFLOW / BUFFER_UNDERFLOW and only consume bytes if non of them is detected.
- Only process one record per call.
Result:
OpenSslEngine behaves like stated in the javadocs of SSLEngine.
Motivation:
We should not use the InternalThreadLocalMap where access may be done from outside the EventLoop as this may create a lot of memory usage while not be reused anyway.
Modifications:
Not use InternalThreadLocalMap in places where the code-path will likely be executed from outside the EventLoop.
Result:
Less memory bloat.
Motivation:
Since Java 7, X509TrustManager implementation is wrapped by a JDK class
called AbstractTrustManagerWrapper, which performs an additional
certificate validation for Socket or SSLEngine-backed connections.
This makes the TrustManager implementations provided by
InsecureTrustManagerFactory and FingerprintTrustManagerFactory not
insecure enough, where their certificate validation fails even when it
should pass.
Modifications:
- Add X509TrustManagerWrapper which adapts an X509TrustManager into an
X509ExtendedTrustManager
- Make SimpleTrustManagerFactory wrap an X509TrustManager with
X509TrustManagerWrapper is the provided TrustManager does not extend
X509ExtendedTrustManager
Result:
- InsecureTrustManagerFactory and FingerprintTrustManagerFactory are now
insecure as expected.
- Fixes#5910
Motivation:
Our default cipher list has not been updated in a while. We current support some older ciphers not commonly in use and we don't support some newer ciphers which are more commonly used.
Modifications:
- Update the default list of ciphers for JDK and OpenSSL.
Result:
Default cipher list is more likely to connect to peers.
Fixes https://github.com/netty/netty/issues/5859
Motivation:
If the user removes the SslHandler while still in the processing loop we will produce an IllegalReferenceCountException. We should stop looping when the handlerwas removed.
Modifications:
Ensure we stop looping when the handler is removed.
Result:
No more IllegalReferenceCountException.
Motivation:
Add test-case for doing mutal auth with a certificate chain that holds more then one certificate.
Modifications:
Add test case
Result:
more tests.
Motivation:
the build doesnt seem to enforce this, so they piled up
Modifications:
removed unused import lines
Result:
less unused imports
Signed-off-by: radai-rosenblatt <radai.rosenblatt@gmail.com>
Motivation:
Currently FlushConsolidationHandler only consolidates if a read loop is
active for a Channel, otherwise each writeAndFlush(...) call will still
be flushed individually. When these calls are close enough, it can be
beneficial to consolidate them even outside of a read loop.
Modifications:
When we allow a flush to "go through", don't perform it immediately, but
submit it on the channel's executor. Under high pressure, this gives
other writes a chance to enqueue before the task gets executed, and so
we flush multiple writes at once.
Result:
Lower CPU usage and less context switching.
Motivation
Give the user the ability to back out from SNI negoations.
Modifications
Put a try-catch around the select() call and re-fire any caught Exceptions.
Result
Fixes#5787
Motivation:
IdleStateHandler has a number of volatile member variables which are only accessed from the EventLoop thread. These do not have to be volatile. The accessibility of these member variables are not consistent between private and package private. The state variable can also use a byte instead of an int.
Modifications:
- Remove volatile from member variables
- Change access to private for member variables
- Change state from int to byte
Result:
IdleStateHandler member variables cleaned up.
Motivation:
IdleStateHandler and ReadTimeoutHandler could mistakely not fire an event even if no channelRead(...) call happened.
Modifications:
Only set lastReadTime if a read happened before.
Result:
More correct IdleStateHandler / ReadTimeoutHandler.
Motivation:
There is an incoherence in terms of API when one wants to use
startTls: without startTls one can use the SslContextBuilder's
method newHandler, but with startTls, the developper is forced
to call directly the SslHandler constructor.
Modifications:
Introduce startTls as a SslContextBuilder parameter as well as a
member in SslContext (and thus Jdk and OpenSsl implementations!).
Always use this information to call the SslHandler constructor.
Use false by default, in particular in deprecated constructors of
the SSL implementations.
The client Context use false by default
Results:
Fixes#5170 and more generally homogenise the API so that
everything can be done via SslContextBuilder.
Motivation
I'm looking to harden our SSL impl. a little bit and add some guards agaist certain types of abuse. One can think of invalid hostname strings in the SNI extenstion or invalid SNI handshakes altogether. This will require measuring, velocity tracking and other things.
Modifications
Adding a protected `lookup(ctx, hostname)` method that is called from SniHandler's `select(...)` method which users can override and implement custom behaviour. The default implementation will simply call the AsyncMapper.
Result
It's possible to get a hold onto the ChannelHandlerContext. Users can override that method and do something with it right there or they can delegate it to something else. SniHandler is happy as long as a `Future<SslContext>` is being returned.
Motivation:
af632278d2 introduced a test which only worked on some jvm versions and specific os'es.
Modifications:
Fix test to work on different java versions and os'es
Result:
No flacky test.
Motivation:
We need to ensure we not set duplicated certificates when using OpenSslEngine.
Modifications:
- Skip first cert in chain when set the chain itself and so not send duplicated certificates
- Add interopt unit tests to ensure no duplicates are send.
Result:
No more duplicates.
Motivation:
AbstractTrafficShapingHandler has a package-private method called "userDefinedWritabilityIndex()" which a user may need to override if two sub-classes wants to be used in the ChannelPipeline.
Modifications:
Mark method protected.
Result:
Easier to extend AbstractTrafficShapingHandler.
Motivation:
SslHandler can be cleaned up a bit in terms of naming and duplicated code.
Modifications:
- Fix naming of arguments
- Not schedule timeout event if not really needed
- share some code and simplify
Result:
Cleaner code.
Motivation:
When a SecurityManager is in place it may dissallow accessing the property which will lead to not be able to load the application.
Modifications:
Use AccessController.doPrivileged(...)
Result:
No more problems with SecurityManager.
Motivation
The SniHandler is currently hiding its replaceHandler() method and everything that comes with it. The user has no easy way of getting a hold onto the SslContext for the purpose of reference counting for example. The SniHandler does have getter methods for the SslContext and hostname but they're not very practical or useful. For one the SniHandler will remove itself from the pipeline and we'd have to track a reference of it externally and as we saw in #5745 it'll possibly leave its internal "selection" object with the "EMPTY_SELECTION" value (i.e. we've just lost track of the SslContext).
Modifications
Expose replaceHandler() and allow the user to override it and get a hold onto the hostname, SslContext and SslHandler that will replace the SniHandler.
Result
It's possible to get a hold onto the SslContext, the hostname and the SslHandler that is about to replace the SniHandler. Users can add additional behavior.
Motiviation:
Previously the way how CertificateRequestCallback was working had some issues which could cause memory leaks and segfaults. Due of this tcnative code was updated to change the signature of the method provided by the interface.
Modifications:
Update CertificateRequestCallback implementations to match new interface signature.
Result:
No more segfaults / memory leaks when using boringssl or openssl >= 1.1.0
Motivation
SslHandler's handlerRemoved() is supposed to release the SSLEngine (which it does) but there is no Test for it to make sure it really happens and doesn't unexpectedly change in the future.
Modifications
Add a Unit Test that makes sure that SslHandler releases the SSLEngine when the Channel gets closed.
Result
Assurance that SslHandler will not leak (ReferenceCounted) SSLEngines.
Motivation:
The SniHandler attempts to generate a new SslHandler from the selected SslContext in a and insert that SslHandler into the pipeline. However if the underlying channel has been closed or the pipeline has been modified the pipeline.replace(..) operation may fail. Creating the SslHandler may also create a SSLEngine which is of type ReferenceCounted. The SslHandler states that if it is not inserted into a pipeline that it will not take reference count ownership of the SSLEngine. Under these conditions we will leak the SSLEngine if it is reference counted.
Modifications:
- If the pipeline.replace(..) operation fails we should release the SSLEngine object.
Result:
Fixes https://github.com/netty/netty/issues/5678
Motivation:
When SslHandler.close(...) is called (as part of Channel.close()). it will also try to flush pending messages. This may fail for various reasons, but we still should propergate the close operation
Modifications:
- Ensure flush(...) itself will not throw an Exception if we was able to at least fail one pending promise (which should always be the case).
- If flush(...) fails as part of close ensure we still close the channel and then rethrow.
Result:
No more lost close operations possible if an exception is thrown during close
Motivation:
ReferenceCountedOpenSslEngine depends upon the the SslContext to cleanup JNI resources. If we don't wait until the ReferenceCountedOpenSslEngine is done with cleanup before cleaning up the SslContext we may crash the JVM.
Modifications:
- Wait for the channels to close (and thus the ReferenceCountedOpenSslEngine to be cleaned up) before cleaning up the associated SslContext.
Result:
Cleanup sequencing is correct and no more JVM crash.
Fixes https://github.com/netty/netty/issues/5692
Motivation:
We should fail all promises with the correct SSLENGINE_CLOSED exception one the engine is closed. We did not fail the current promise with this exception if the ByteBuf was not readable.
Modifications:
Correctly fail promises.
Result:
More correct handling of promises if the SSLEngine is closed.
Motivation:
Commit b963595988 added a unit that will not work when KeyManagerFactory is used.
Modifications:
Only run the test if OpenSsl.useKeyManagerFactory() returns false.
Result:
Builds with boringssl
Motivation:
The private key and certificate that are passed into #serKeyMaterial() could be PemEncoded in which case the #toPEM() methods return the identity of the value.
That in turn will fail in the #toBIO() step because the underlying ByteBuf is not necessarily direct.
Modifications:
- Use toBIO(...) which also works with non direct PemEncoded values
- Add unit test.
Result:
Correct handling of PemEncoded.
Motivation:
Its completely fine to start writing before the handshake completes when using SslHandler. The writes will be just queued.
Modifications:
Remove the missleading and incorrect javadoc.
Result:
Correct javadoc.
Motivation:
If netty is used in a tomcat container tomcat itself may ship tcnative. Because of this we will try to use OpenSsl in netty and fail because it is different to netty-tcnative.
Modifications:
Ensure if we find tcnative it is really netty-tcnative before using it.
Result:
No more problems when using netty in a tomcat container that also has tcnative installed.
Motivation:
We need to ensure we only call ReferenceCountUtil.safeRelease(...) in finalize() if the refCnt() > 0 as otherwise we will log a message about IllegalReferenceCountException.
Modification:
Check for a refCnt() > 0 before try to release
Result:
No more IllegalReferenceCountException produced when run finalize() on OpenSsl* objects that where explicit released before.
Motivation:
netty-tcnative API has changed to remove a feature that contributed to a memory leak.
Modifications:
- Update to use the modified netty-tcnative API
Result:
Netty can use the latest netty-tcnative.
Motivation:
In latest refeactoring we failed to cleanup imports and also there are some throws declarations which are not needed.
Modifications:
Cleanup imports and throws declarations
Result:
Cleaner code.
Motivation:
OpenSslEngine and OpenSslContext currently rely on finalizers to ensure that native resources are cleaned up. Finalizers require the GC to do extra work, and this extra work can be avoided if the user instead takes responsibility of releasing the native resources.
Modifications:
- Make a base class for OpenSslENgine and OpenSslContext which does not have a finalizer but instead implements ReferenceCounted. If this engine is inserted into the pipeline it will be released by the SslHandler
- Add a new SslProvider which can be used to enable this new feature
Result:
Users can opt-in to a finalizer free OpenSslEngine and OpenSslContext.
Fixes https://github.com/netty/netty/issues/4958
Motivation:
Sometimes it may be useful to explicit disable the usage of the KeyManagerFactory when using OpenSsl.
Modifications:
Add io.netty.handler.ssl.openssl.useKeyManagerFactory which can be used to explicit disable KeyManagerFactory usage.
Result:
More flexible usage.
Motivation:
We should take the readerIndex into account whe write into the BIO. Its currently not a problem as we slice before and so the readerIndex is always 0 but we should better not depend on this as this will break easily if we ever refactor the code and not slice anymore.
Modifications:
Take readerIndex into acount.
Result:
More safe and correct use.
