Motivation:
We missed to correctly clear the error stack in one case when using the ReferenceCountedOpenSslEngine. Because of this it was possible to pick up an error on an unrelated operation.
Modifications:
- Correctly clear the stack
- Add verification of empty error stack to tests.
Result:
Not possible to observe unrelated errors.
Motivation:
We had a bug-report that claimed the src buffer used by OpenSslEngine will be zero out.
Modifications:
Add testcase to ensure correct behaviour
Result:
Testcase for https://github.com/netty/netty/issues/7753
Motivation:
LibreSSL removed support for NPN in its 2.6.1+ releases.
Modifications:
Skip NPN tests in libressl 2.6.1+
Result:
Be able to run netty tests against libressl 2.6.1+ as well.
Motivation:
When SSL handshake fails, the connection should be closed. This is not true anymore after 978a46c.
Modifications:
- Ensure we always flush and close the channel on handshake failure.
- Add testcase.
Result:
Fixes [#7724].
Motivation:
Sometimes, it would be convenient to be able to easily enable all
supported cipher suites, regardless of security.
Currently, the only way it to retrieve all supported ciphers and pass
them explicitly.
Modification:
Introduce a new IdentityCipherSuiteFilter singleton that defaults to
supportedCiphers instead of defaultCiphers when ciphers are null.
Result:
Convenient way to enabled all supported cipher suites.
Motivation:
JdkSslContext builds the list of supported cipher suites, but assumes that ciphers prefixed with SSL_ and TLS_ will be interchangeable. However this is not the case and only applies to a small subset of ciphers. This results in the JdkSslContext attempting to use unsupported ciphers.
Modifications:
- When building the list of ciphers in JdkSslContext we should first check if the engine supports the TLS_ prefix cipher.
Result:
Fixes https://github.com/netty/netty/issues/7673
Motivation:
SslHandler#decode methods catch any exceptions and attempt to wrap
before shutting down the engine. The intention is to write any alerts
which the engine may have pending. However the wrap process may also
attempt to write user data, and may also complete the associated
promises. If this is the case, and a promise listener closes the channel
then SslHandler may later propagate a SslHandshakeCompletionEvent user
event through the pipeline. Since the channel has already been closed
the user may no longer be paying attention to user events.
Modifications:
- Sslhandler#decode should first fail the associated handshake promise
and propagate the SslHandshakeCompletionEvent before attempting to wrap
Result:
Fixes https://github.com/netty/netty/issues/7639
Motivation:
We recently removed support for renegotiation, but there are still some hooks to attempt to allow remote initiated renegotiation to succeed. The remote initated renegotiation can be even more problematic from a security stand point and should also be removed.
Modifications:
- Remove state related to remote iniated renegotiation from OpenSslEngine
Result:
More renegotiation code removed from the OpenSslEngine code path.
Motivation:
SSL.setState() has gone from openssl 1.1. Calling it is, and probably
always has been, incorrect. Doing renogitation in this manner is
potentially insecure. There have been at least two insecure
renegotiation vulnerabilities in users of the OpenSSL library.
Renegotiation is not necessary for correct operation of the TLS protocol.
BoringSSL has already eliminated this functionality, and the tests
(now deleted) were not running on BoringSSL.
Modifications:
If the connection setup has completed, always return that
negotiation is not supported. Previously this was done only if we were
the client.
Remove the tests for this functionality.
Fixes#6320.
Motivation:
We tried to call `select` after we closed the channel (and so removed all the handlers from the pipeline) when we detected a non SSL record. This would cause an exception like this:
```
Caused by: java.util.NoSuchElementException: io.netty.handler.ssl.SniHandler
at io.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:1098)
at io.netty.channel.DefaultChannelPipeline.replace(DefaultChannelPipeline.java:506)
at io.netty.handler.ssl.SniHandler.replaceHandler(SniHandler.java:133)
at io.netty.handler.ssl.SniHandler.onLookupComplete(SniHandler.java:113)
at io.netty.handler.ssl.AbstractSniHandler.select(AbstractSniHandler.java:225)
at io.netty.handler.ssl.AbstractSniHandler.decode(AbstractSniHandler.java:218)
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428)
... 40 more
```
Modifications:
- Ensure we rethrow the NotSslRecordException when detecting it (and closing the channel). This will also ensure we not call `select(...)`
- Not catch `Throwable` but only `Exception`
- Add test case.
Result:
Correctly handle the case of an non SSL record.
* FIX: force a read operation for peer instead of self
Motivation:
When A is in `writeInProgress` and call self close, A should
`finishPeerRead` for B(A' peer).
Modifications:
Call `finishPeerRead` with peer in `LocalChannel#doClose`
Result:
Clear confuse of code logic
* FIX: preserves order of close after write in same event loop
Motivation:
If client and server(client's peer channel) are in same event loop, client writes data to
server in `ChannelActive`. Server receives the data and write it
back. The client's read can't be triggered becasue client's
`ChannelActive` is not finished at this point and its `readInProgress`
is false. Then server closes itself, it will also close the client's
channel. And client has no chance to receive the data.
Modifications:
1. Add a test case to demonstrate the problem
2. When `doClose` peer, we always call
`peer.eventLoop().execute()` and `registerInProgress` is not needed.
3. Remove test case
`testClosePeerInWritePromiseCompleteSameEventLoopPreservesOrder`. This
test case can't pass becasue of this commit. IMHO, I think it is OK,
becasue it is reasonable that the client flushes the data to socket,
then server close the channel without received the data.
4. For mismatch test in SniClientTest, the client should receive server's alert before closed(caused by server's close)
Result:
The problem is gone.
Motivation:
At the moment its a bit "hacky" to retrieve the hostname that was used during SNI as you need to hold a reference to SniHandler and then call hostname() once the selection is done. It would be better to fire an event to let the user know we did the selection.
Modifications:
Add a SniCompletionEvent that can be used to get the hostname that was used to do the selection and was included in the SNI extension.
Result:
Easier usage of SNI.
Motivation:
The default enabled cipher suites of the OpenSsl engine are not set to
SslUtils#DEFAULT_CIPHER_SUITES. Instead all available cipher suites are
enabled. This should happen only as a fallback.
Modifications:
Moved the line in the static initializer in OpenSsl which adds the
SslUtils#DEFAULT_CIPHER_SUITES to the default enabled cipher suites up
before the fallback.
Result:
The default enabled cipher suites of the OpenSsl engine are set to the
available ones of the SslUtils#DEFAULT_CIPHER_SUITES.
The default enabled cipher suites of the OpenSsl engine are only set to
all available cipher suites if no one of the
SslUtils#DEFAULT_CIPHER_SUITES is supported.
Motivation:
We should not fire a SslHandshakeEvent if the channel is closed but the handshake was not started.
Modifications:
- Add a variable to SslHandler which tracks if an handshake was started yet or not and depending on this fire the event.
- Add a unit test
Result:
Fixes [#7262].
Motivation:
At the moment use loops to run SslHandler tests with different SslProviders which is error-prone and also make it difficult to understand with which provider these failed.
Modifications:
- Move unit tests that should run with multiple SslProviders to extra class.
- Use junit Parameterized to run with different SslProvider combinations
Result:
Easier to understand which SslProvider produced test failures
complete
Motivation:
SslHandler removes a Buffer/Promise pair from
AbstractCoalescingBufferQueue when wrapping data. However it is possible
the SSLEngine will not consume the entire buffer. In this case
SslHandler adds the Buffer back to the queue, but doesn't add the
Promise back to the queue. This may result in the promise completing
immediately in finishFlush, and generally not correlating to the
completion of writing the corresponding Buffer
Modifications:
- AbstractCoalescingBufferQueue#addFirst should also support adding the
ChannelPromise
- In the event of a handshake timeout we should immediately fail pending
writes immediately to get a more accurate exception
Result:
Fixes https://github.com/netty/netty/issues/7378.
Motivation:
SslHandler only supports ByteBuf objects, but will not release objects of other types. SslHandler will also not release objects if its internal state is not correctly setup.
Modifications:
- Release non-ByteBuf objects in write
- Release all objects if the SslHandler queue is not setup
Result:
Less leaks in SslHandler.
Motivation:
Bug in capacity calculation: occurs auto convert to string instead of sum up.
Modifications:
Use `eventName.length()` in sum.
Result:
Less trash in logs.
Motivation:
We should also enforce the handshake timeout on the server-side to allow closing connections which will not finish the handshake in an expected amount of time.
Modifications:
- Enforce the timeout on the server and client side
- Add unit test.
Result:
Fixes [#7230].
Motivation:
Even if it's a super micro-optimization (most JVM could optimize such
cases in runtime), in theory (and according to some perf tests) it
may help a bit. It also makes a code more clear and allows you to
access such methods in the test scope directly, without instance of
the class.
Modifications:
Add 'static' modifier for all methods, where it possible. Mostly in
test scope.
Result:
Cleaner code with proper 'static' modifiers.
Motivation:
Without a 'serialVersionUID' field, any change to a class will make
previously serialized versions unreadable.
Modifications:
Add missed 'serialVersionUID' field for all Serializable
classes.
Result:
Proper deserialization of previously serialized objects.
Motivation:
Java9SslEngine did not correctly implement ApplicationProtocolAccessor and so returned an empty String when no extension was used while the interface contract is to return null. This lead to the situation that ApplicationProtocolNegationHandler did not correct work.
Modifications:
- Rename ApplicationProtocolAccessor.getApplicationProtocol() to getNegotiatedApplicationProtocol() which resolves the clash with the method exposed by Java9s SSLEngine.
- Correctly implement getNegotiatedApplicationProtocol() for Java9Sslengine
- Add delegate in Java9Sslengine.getApplicationProtocol() which is provided by Java9
- Adjust tests to test the correct behaviour.
Result:
Fixes [#7251].
Motivation:
A bunch of unit tests are failing due to certificates having expired.
This has to be replaced with a newly generated certificate that has a
longer validity.
Modifications:
- generated a certificate with validity of 100 years from now
Results:
Unit tests are passing again
Motivation:
Netty is unable to use Java9s ALPN support atm.
Modifications:
When running on Java9+ we invoke the correct methods that are exposed on the Java9+ implementation of SSLEngine and so be able to support ALPN.
This patch is based on the work of @rschmitt and so https://github.com/netty/netty/pull/6992.
Result:
Fixes#6933.
Motivation:
When SslHandlerTest#testCompositeBufSizeEstimationGuaranteesSynchronousWrite fails it would be useful to know the SslProvider type
Modifications:
- Print the sever and client SslProvider upon failure
- Increase test timeout to 8 minutes to allow more time to run
Result:
Failures include more info to help diagnose issues.
Motivation:
DelegatingSslContext at the moment intercept newEngine calls and allow to init the SslEngine after it is created. The problem here is that this may not work the SSLEngine that is wrapped in the SslHandler when calling newHandler(...). This is because some SslContext implementations not delegate to newEngine(...) when creating the SslHandler to allow some optimizations. For this we should also allow to init the SslHandler after its creation and by default just delegate to initEngine(...).
Modifications:
Allow the user to also init the SslHandler after creation while by default init its SSLEngine after creation.
Result:
More flexible and correct code.
Motivation:
SslHandlerTest#testCompositeBufSizeEstimationGuaranteesSynchronousWrite has been observed to fail on CI servers, but it is not clear why.
Modifications:
- Add more visibility into what the state was and what the condition that caused the failure was.
Result:
More visibility when the test fails.
Motivation:
We need to ensure we not try to load any conscrypt classes directly (which means without using reflection) in the same class that is used to check if conscrypt is available. This is needed as otherwise we will have the following problem when try to use netty on java7:
java.lang.UnsupportedClassVersionError: org/conscrypt/BufferAllocator : Unsupported major.minor version 52.0
at io.netty.handler.ssl.ConscryptJdkSslEngineInteropTest.checkConscrypt(ConscryptJdkSslEngineInteropTest.java:49)
This regression was introduced by 4448b8f42f and detected on the CI when using:
mvn clean package -DtestJavaHome=$JAVA7_HOME
Modifications:
Move the detection code in an extra class and use it.
Result:
Works correctly also when using Java7.
Motivation:
Starting with 1.0.0.RC9, conscrypt supports a buffer allocator.
Modifications:
- Updated the creation process for the engine to pass through the
ByteBufAllocator.
- Wrap a ByteBufAllocator with an adapter for conscrypt.
- Added a property to optionally control whether conscrypt uses
Netty's buffer allocator.
Result:
Netty+conscrypt will support using Netty's ByteBufAllocator.
Motivation:
We need to ensure we only create the ResourceLeak when the constructor not throws.
Modifications:
Ensure ResourceLeakDetector.track(...) is only called if the constructor of ReferenceCoundedOpenSslEngine not throws.
Result:
No more false-positves.
Motivation:
ByteBuf#ensureWritable(int,boolean) returns an int indicating the status of the resize operation. For buffers that are unmodifiable or cannot be resized this method shouldn't throw but just return 1.
ByteBuf#ensureWriteable(int) should throw unmodifiable buffers.
Modifications:
- ReadOnlyByteBuf should be updated as described above.
- Add a unit test to SslHandler which verifies the read only buffer can be tolerated in the aggregation algorithm.
Result:
Fixes https://github.com/netty/netty/issues/7002.
Motivation:
Lots of usages of SelfSignedCertificates were not deleting the certs at
the end of the test. This includes setupHandlers() which is used by
extending classes. Although these files will be deleted at JVM exit and
deleting them early does not free the JVM from trying to delete them at
shutdown, it's good practice to delete eagerly and since users sometimes
use tests as a form of documentation, it'd be good for them to see the
explicit deletes.
Modifications:
Add missing delete() calls to ½ of the SelfSignedCertificates-using
tests.
Result:
Tests that more clearly communicates which resources are created and
may accumulate without early delete.
Motivation:
Previously filterCipherSuites was being passed the OpenSSL-formatted
cipher names. Commit 43ae974 introduced a regression as it swapped to the
RFC/JDK format, except that user-provided ciphers were not converted and
remained in the OpenSSL format.
This mis-match would cause all user-provided to be thrown away, leading
to failure trying to set zero ciphers:
Exception in thread "main" javax.net.ssl.SSLException: failed to set cipher suite: []
at io.netty.handler.ssl.ReferenceCountedOpenSslContext.<init>(ReferenceCountedOpenSslContext.java:299)
at io.netty.handler.ssl.OpenSslContext.<init>(OpenSslContext.java:43)
at io.netty.handler.ssl.OpenSslServerContext.<init>(OpenSslServerContext.java:347)
at io.netty.handler.ssl.OpenSslServerContext.<init>(OpenSslServerContext.java:335)
at io.netty.handler.ssl.SslContext.newServerContextInternal(SslContext.java:421)
at io.netty.handler.ssl.SslContextBuilder.build(SslContextBuilder.java:441)
Caused by: java.lang.Exception: Unable to configure permitted SSL ciphers (error:100000b1:SSL routines:OPENSSL_internal:NO_CIPHER_MATCH)
at io.netty.internal.tcnative.SSLContext.setCipherSuite(Native Method)
at io.netty.handler.ssl.ReferenceCountedOpenSslContext.<init>(ReferenceCountedOpenSslContext.java:295)
... 7 more
Modifications:
Remove the reformatting of user-provided ciphers, as they are already in
the RFC/JDK format.
Result:
No regression, and the internals stay sane using the RFC/JDK format.
Motivation:
Some ChannelOptions must be set before the Channel is really registered to have the desired effect.
Modifications:
Add another constructor argument which allows to not register the EmbeddedChannel to its EventLoop until the user calls register().
Result:
More flexible usage of EmbeddedChannel. Also Fixes [#6968].
Motivation:
6152990073 introduced a test-case in SSLEngineTest which used OpenSsl.* which should not be done as this is am abstract bass class that is also used for non OpenSsl tests.
Modifications:
Move the protocol definations into SslUtils.
Result:
Cleaner code.
Motivation:
TLS doesn't support a way to advertise non-contiguous versions from the client's perspective, and the client just advertises the max supported version. The TLS protocol also doesn't support all different combinations of discrete protocols, and instead assumes contiguous ranges. OpenSSL has some unexpected behavior (e.g. handshake failures) if non-contiguous protocols are used even where there is a compatible set of protocols and ciphers. For these reasons this method will determine the minimum protocol and the maximum protocol and enabled a contiguous range from [min protocol, max protocol] in OpenSSL.
Modifications:
- ReferenceCountedOpenSslEngine#setEnabledProtocols should determine the min/max protocol versions and enable a contiguous range
Result:
OpenSslEngine is more consistent with the JDK's SslEngineImpl and no more unexpected handshake failures due to protocol selection quirks.
Motivation:
Each call to SSL_write may introduce about ~100 bytes of overhead. The OpenSslEngine (based upon OpenSSL) is not able to do gathering writes so this means each wrap operation will incur the ~100 byte overhead. This commit attempts to increase goodput by aggregating the plaintext in chunks of <a href="https://tools.ietf.org/html/rfc5246#section-6.2">2^14</a>. If many small chunks are written this can increase goodput, decrease the amount of calls to SSL_write, and decrease overall encryption operations.
Modifications:
- Introduce SslHandlerCoalescingBufferQueue in SslHandler which will aggregate up to 2^14 chunks of plaintext by default
- Introduce SslHandler#setWrapDataSize to control how much data should be aggregated for each write. Aggregation can be disabled by setting this value to <= 0.
Result:
Better goodput when using SslHandler and the OpenSslEngine.
Motivation:
The JDK SSLEngine documentation says that a call to wrap/unwrap "will attempt to consume one complete SSL/TLS network packet" [1]. This limitation can result in thrashing in the pipeline to decode and encode data that may be spread amongst multiple SSL/TLS network packets.
ReferenceCountedOpenSslEngine also does not correct account for the overhead introduced by each individual SSL_write call if there are multiple ByteBuffers passed to the wrap() method.
Modifications:
- OpenSslEngine and SslHandler supports a mode to not comply with the limitation to only deal with a single SSL/TLS network packet per call
- ReferenceCountedOpenSslEngine correctly accounts for the overhead of each call to SSL_write
- SslHandler shouldn't cache maxPacketBufferSize as aggressively because this value may change before/after the handshake.
Result:
OpenSslEngine and SslHanadler can handle multiple SSL/TLS network packet per call.
[1] https://docs.oracle.com/javase/7/docs/api/javax/net/ssl/SSLEngine.html
Motivation:
SslHandlerTest#testCompositeBufSizeEstimationGuaranteesSynchronousWrite has been observed to fail on CI servers. Knowing how many bytes were seen by the client would be helpful.
Modifications:
- Add bytesSeen to the exception if the client closes early.
Result:
More debug info available.
Motivation:
PR #6811 introduced a public utility methods to decode hex dump and its parts, but they are not visible from netty-common.
Modifications:
1. Move the `decodeHexByte`, `decodeHexDump` and `decodeHexNibble` methods into `StringUtils`.
2. Apply these methods where applicable.
3. Remove similar methods from other locations (e.g. `HpackHex` test class).
Result:
Less code duplication.
Motivation:
For historical reasons OpenSSL's internal naming convention for CHACHA20 based cipher suites does not include the HMAC algorithm in the cipher name. This will prevent the CHACHA20 cipher suites from being used if the RFC cipher names are specified.
Modifications:
- Add a special case for CHACHA20 cipher name conversions in CipherSuiteConverter
- Update OPENSSL_CIPHERSUITE_PATTERN to accommodate the new naming scheme for CHACHA20 cipher suites
Result:
CipherSuiteConverter now works with CHACHA20 cipher suites.
Motivation
RFC 6066 (https://tools.ietf.org/html/rfc6066#page-6) says that the hostname in the SNI extension is ASCII encoded but Netty decodes it using UTF-8.
Modifications
Use ASCII instead of UTF-8
Result
Fixes#6717
Motivation:
We not correctly handle LE buffers when try to read the packet length out of the buffer and just assume it always is a BE buffer.
Modifications:
Correctly account for the endianess of the buffer when reading the packet lenght.
Result:
Fixes [#6709].
Motivation:
SSL_write requires a fixed amount of bytes for overhead related to the encryption process for each call. OpenSslEngine#wrap(..) will attempt to encrypt multiple input buffers until MAX_PLAINTEXT_LENGTH are consumed, but the size estimation provided by calculateOutNetBufSize may not leave enough room for each call to SSL_write. If SSL_write is not able to completely write results to the destination buffer it will keep state and attempt to write it later. Netty doesn't account for SSL_write keeping state and assumes all writes will complete synchronously (by attempting to allocate enough space to account for the overhead) and feeds the same data to SSL_write again later which results in corrupted data being generated.
Modifications:
- OpenSslEngine#wrap should only produce a single TLS packet according to the SSLEngine API specificaiton [1].
[1] https://docs.oracle.com/javase/8/docs/api/javax/net/ssl/SSLEngine.html#wrap-java.nio.ByteBuffer:A-int-int-java.nio.ByteBuffer-
- OpenSslEngine#wrap should only consider a single buffer when determining if there is enough space to write, because only a single buffer will ever be consumed.
Result:
OpenSslEngine#wrap will no longer produce corrupted data due to incorrect accounting of space required in the destination buffers.
Motivation:
When adding SNIMatcher support we missed to use static delegating methods and so may try to load classes that not exists in Java7. Which will lead to errors.
Modifications:
- Correctly only try to load classes when running on java8+
- Ensure Java8+ related tests only run when using java8+
Result:
Fixes [#6700]
Motivation:
Java8 adds support for SNIMatcher to reject SNI when the hostname not matches what is expected. We not supported doing this when using SslProvider.OPENSSL*.
Modifications:
- Add support for SNIMatcher when using SslProvider.OPENSSL*
- Add unit tests
Result:
SNIMatcher now support with our own SSLEngine as well.
Motivation:
We need to ensure we only try to to test with the SslProviders that are supported when running the SslHandlerTest.testCompositeBufSizeEstimationGuaranteesSynchronousWrite test.
Modifications:
Skip SslProvider.OPENSSL* if not supported.
Result:
No more test-failures if openssl is not installed on the system.
