Motivation:
Users who want to construct a `FlushConsolidationHandler` with a default `explicitFlushAfterFlushes` but non-default `consolidateWhenNoReadInProgress` may benefit from having an easy way to get the default "flush after flushes" count.
Modifications:
- Moved default `explicitFlushAfterFlushes` value to a public constant.
- Adjusted Javadoc accordingly.
Result:
Default `explicitFlushAfterFlushes` is accessible to callers.
Motivation:
SSLSession.putValue / getValue / removeValue / getValueNames must be thread-safe as it may be called from multiple threads. This is also the case in the OpenJDK implementation.
Modifications:
Guard with synchronized (this) blocks to keep the memory overhead low as we do not expect to have these called frequently.
Result:
SSLSession implementation is thread-safe.
Motivation:
If two requests from the same IP are reached at the same time, `connected.contains(remoteIp)` may return false in both threads.
Modifications:
Check if there is already a connection with the same IP using return values.
Result:
Become thread safe.
Swallow SSL Exception "closing inbound before receiving peer's close_notify" when running on Java 11 (#8463)
Motivation:
When closing a inbound SSL connection before the remote peer has send a close notify, the Java JDK is trigger happy to throw an exception. This exception can be ignored since the connection is about to be closed.
The exception wasn't printed in Java 8, based on filtering on the exception message. In Java 11 the exception message has been changed.
Modifications:
Update the if statement to also filter/swallow the message on Java 11.
Result:
On Java 11 the exception isn't printed with log levels set to debug. The old behaviour is maintained.
Motivation:
The SSLSession.getLocalCertificates() / getLocalPrincipial() methods did not correctly return the local configured certificate / principal if a KeyManagerFactory was used when configure the SslContext.
Modifications:
- Correctly update the local certificates / principial when the key material is selected.
- Add test case that verifies the SSLSession after the handshake to ensure we correctly return all values.
Result:
SSLSession returns correct values also when KeyManagerFactory is used with the OpenSSL provider.
Motivation:
We did not return the pointer to SSL_CTX put to the internal datastructure of tcnative.
Modifications:
Return the correct pointer.
Result:
Methods work as documented in the javadocs.
* Correctly convert supported signature algorithms when using BoringSSL
Motivation:
BoringSSL uses different naming schemes for the signature algorithms so we need to adjust the regex to also handle these.
Modifications:
- Adjust SignatureAlgorithmConverter to handle BoringSSL naming scheme
- Ensure we do not include duplicates
- Add unit tests.
Result:
Correctly convert boringssl signature algorithm names.
Motivation:
We did not correctly convert between openssl / boringssl and java ciphers when using TLV1.3 which had different effects when either using openssl or boringssl.
- When using openssl and TLSv1.3 we always returned SSL_NULL_WITH_NULL_NULL as cipher name
- When using boringssl with TLSv1.3 we always returned an incorrect constructed cipher name which does not match what is defined by Java.
Modifications:
- Add correct mappings in CipherSuiteConverter for both openssl and boringssl
- Add unit tests for CipherSuiteConvert
- Add unit in SSLEngine which checks that we do not return SSL_NULL_WITH_NULL_NULL ever and that server and client returns the same cipher name.
Result:
Fixes https://github.com/netty/netty/issues/8477.
Motivation:
The code for initiating a TLS handshake or renegotiation process is
currently difficult to reason about.
Modifications:
This commit introduces to clear paths for starting a handshake. The
first path is a normal handshake. The handshake is started and a timeout
is scheduled.
The second path is renegotiation. If the first handshake is incomplete,
the renegotiation promise is added as a listener to the handshake
promise. Otherwise, the renegotiation promise replaces the original
promsie. At that point the handshake is started again and a timeout is
scheduled.
Result:
Cleaner and easier to understand code.
Motivation:
We did not correctly schedule the handshake timeout if the handshake was either started by a flush(...) or if starttls was used.
Modifications:
- Correctly setup timeout in all cases
- Add unit tests.
Result:
Fixes https://github.com/netty/netty/issues/8493.
Motivation:
If you attempt to write to a channel with an SslHandler prior to channelActive being called you can hit an assertion. In particular - if you write to a channel it forces some handshaking (through flush calls) to occur.
The AssertionError only happens on Java11+.
Modifications:
- Replace assert by an "early return" in case of the handshake be done already.
- Add unit test that verifies we do not hit the AssertionError anymore and that the future is correctly failed.
Result:
Fixes https://github.com/netty/netty/issues/8479.
Motivation:
We did not override all methods in OpenSslX509Certificate and delegate to the internal 509Certificate.
Modifications:
Add missing overrides.
Result:
More correct implementation
Motivation:
Due a bug in our implementation we tried to release the same ByteBuf two times when we failed to parse the X509Certificate as closing the ByteBufInputStream already closed it.
Modifications:
- Don't close the ByteBuf when closing the ByteBufInputStream
- Explicit release all ByteBufs after we are done parsing in a finally block.
- Add testcase.
Result:
Do not produce an IllegalReferenceCountException and throw the correct CertificateException.
Motivation:
SHA1 is a broken hash function and shouldn't be used anymore (see: https://shattered.io/).
Security scanning tools will raise this as an issue and it will reflect badly on netty and I, therefore, recommend to use a SHA2 hash function which is secure and won't be flagged by such tools.
Modifications:
Replaced insecure SHA1 based signing scheme with SHA2.
Result:
Modern and thus secure cryptographic primitives will be in use and won't be flagged by security scanning tools.
Motivation:
201e984cb3 added support to use native TLSv1.3 support even with Java versions prior to 11. For this we try to detect if we need to wrap the used KeyManager or not. This testing code did create an X509Certificate[1] but does not correctly also set the certficiate on index 0. While this should be harmless we should better do the right thing and set it.
Modifications:
Correctly init the array.
Result:
Cleaner and more correct code.
Motivation:
0ddc62cec0 added support for TLSv1.3 when using openssl 1.1.1. Now that BoringSSL chromium-stable branch supports it as well we can also support it with netty-tcnative-boringssl-static.
During this some unit tests failed with BoringSSL which was caused by not correctly handling flush() while the handshake is still in progress.
Modification:
- Upgrade netty-tcnative version which also supports TLSv1.3 when using BoringSSL
- Correctly handle flush() when done while the handshake is still in progress in all cases.
Result:
Easier for people to enable TLSv1.3 when using native SSL impl.
Ensure flush() while handshake is in progress will always be honored.
Motivation:
OpenSsl used SelfSignedCertificate in its static init block to detect if KeyManagerFactory is supported. Unfortunally this only works when either sun.security.x509.* can be accessed or bouncycastle is on the classpath.
We should not depend on either of it.
This came up in https://github.com/netty/netty-tcnative/issues/404#issuecomment-431551890.
Modifications:
Just directly use the bytes to generate the X509Certificate and so not depend on sun.security.x509.* / bouncycastle.
Result:
Correctly be able to detect if KeyManagerFactory can be supported in all cases.
Motivation:
At the moment it's only possible to use TLSv1.3 with netty-tcnative if Java 11 is used. It should be possible to do so even with Java 8, 9 and 10.
Modification:
Add a workaround to be able to use TLSv1.3 also when using Java version prior to Java 11 and the default X509ExtendedTrustManager is used.
Result:
Be able to use TLSv1.3 also with past versions of Java.
Motivation:
When the constructor of OpenSslEngine threw we could end up to self call SSL_free by ourself and then have the finalizer do the same which may lead to double free-ing and so SIGSEV.
Modifications:
Just call shutdown() when the constructor throws and so ensure SSL_free is guarded correctly in the finalizer.
Result:
No more SIGSEV possible.
Motivation:
TLSv1.3 support is included in java11 and is also supported by OpenSSL 1.1.1, so we should support when possible.
Modifications:
- Add support for TLSv1.3 using either the JDK implementation or the native implementation provided by netty-tcnative when compiled against openssl 1.1.1
- Adjust unit tests for semantics provided by TLSv1.3
- Correctly handle custom Provider implementations that not support TLSv1.3
Result:
Be able to use TLSv1.3 with netty.
Motivation:
JdkSslContext provides public constructors to wrap an existing `javax.net.ssl.SSLContext`.
Sadly, some options combinations are not possible with the existing constructors, eg:
* protocols is not exposed and always forced to null, so default protocols are always enforced
* startTls is not exposed and always forced to false
Modification:
Add full constructor that take protocols and startTls parameters.
Result:
It's possible to create a JdkSslContext from an existing SSLContext and still have control over protocols and startTls
Motivation:
It is possible that a client is unable to locate a certificate alias given the list of issuers and key types. In this case the X509KeyManager
will return a null which when past to the OpenSslKeyMaterialProvider implementation may produce a NPE. If no matching alias could be found we should not
call OpenSslKeyMaterialProvider at all which is also consistent what OpenJDK does.
Modifications:
- Add null check before calling OpenSslKeyMaterialProvider
- Add unit test.
Result:
No more NPE caused by passing null as client alias.
Motivation:
Before when on server-side we just called the X509KeyManager methods when handshake() was called the first time which is not quite correct as we may not have received the full SSL hello / handshake and so could not extra for example the SNI hostname that was requested.
OpenSSL exposes the SSL_CTX_set_cert_cb function which allows to set a callback which is executed at the correct moment, so we should use it. This also allows us to support more methods of ExtendedSSLSession easily.
Modifications:
- Make use of new methods exposed by netty-tcnative since https://github.com/netty/netty-tcnative/pull/388 to ensure we select the key material at the correct time.
- Implement more methods of ExtendedOpenSslSession
- Add unit tests to ensure we are able to retrieve various things on server-side in the X509KeyManager and so verify it is called at the correct time.
- Simplify code by using new netty-tcnative methods.
Result:
More correct implementation for server-side usage and more complete implemented of ExtendedSSLSession.
Motivation:
When a X509TrustManager is used while configure the SslContext the JDK automatically does some extra checks during validation of provided certs by the remote peer. We should do the same when our native implementation is used.
Modification:
- Automatically wrap a X509TrustManager and so do the same validations as the JDK does.
- Add unit tests.
Result:
More consistent behaviour. Fixes https://github.com/netty/netty/issues/6664.
Motivation:
Java9 added getStatusResponses() to ExtendedSSLSession which we should correctly support when possible.
Modifications:
Implement the method correctly.
Result:
More complete and correct implementation.
Motivation:
6ed7c6c75d added support for ExtendedOpenSslSession but we did not override getStatusResponses(). This lead to test failures on java9.
Modifications:
Implement ExtendedOpenSslSession.getStatusResponses() so it just returns an empty list.
Result:
Test pass again on Java9.
Motivation:
When an ExtendedSSLSession is used its possible to do more strict checking of the keys during handshake. We should do this whenever possible.
Modification:
- Return an ExtendedSSLSession when using client-mode and Java7+
- Add unit test
- Simplify unit tests
Result:
More consistent behaviour.
* PemPrivateKey.toPem(...) should throw IllegalArgumentException when PrivateKey which does not support encoding is used.
Motivation:
At the moment when a PrivateKey is used that does not support encoding we throw a NPE when trying to convert the key. We should better throw an IllegalArgumentException with the details about what key we tried to encode.
Modifications:
- Check if PrivateKey.getEncoded() returns null and if so throw an IllegalArgumentException
- Add unit test.
Result:
Better handling of non-supported PrivateKey implementations.
Motivation:
ea626ef8c3 added more debug logging but we can even include a bit more.
Modifications:
Always log the error number as well.
Result:
More informations for debugging SSL errors.
Motivation:
We should log a bit more details about why we shutdown the SSL.
Modifications:
Add the return value of SSL_get_error(...) as well in debug mode.
Result:
More logging to make it easier to understand why an SSL error happened.
Motivation:
OpenSSL itself has an abstraction which allows you to customize some things. For example it is possible to load the PrivateKey from the engine. We should support this.
Modifications:
Add two new static methods to OpenSslX509KeyManagerFactory which allow to create an OpenSslX509KeyManagerFactory that loads its PrivateKey via the OpenSSL Engine directly.
Result:
More flexible usage of OpenSSL possible
Motivation:
In OpenSslCertificateException we should ensure we try to load netty-tcnative before trying to use any class from it as otherwise it may throw an error due missing linking of the native libs.
Modifications:
- Ensure we call OpenSsl.isAvailable() before we try to use netty-tcnative for validation
- Add testcase.
Result:
No more errors causing by not loading native libs before trying to use these.
* Rename SslHandler.close(...) to closeOutbound(...) as it is still useful and delegate to the methods.
Motivation:
Sometimes the user may want to send a close_notify without closing the underlying Channel. For this we offered the SslHandler.close(...) methods which were marked as deeprecated. We should offer an way to still do this without the user calling deprecated methods.
See https://stackoverflow.com/questions/51710231/using-nettys-sslhandlerclosechannelhandlercontext-channelpromise/51753742#comment90555949_51753742 .
Modifications:
- Remove deprecation of the SslHandler.close(...) method that exactly allows this and rename these to closeOutbound(...) as this is more clear.
- Add close(...) methods that delegate to these and mark these as deprecated.
Result:
Be able to send close_notify without closing the Channel.
Motivation:
When using the JDK SSL provider in client mode, the SNI host names (called serverNames in SslEngineImpl) is set to the peerHost (if available) that is used to initialize the SSL Engine:
http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/share/classes/sun/security/ssl/SSLEngineImpl.java#l377
This allows one to call SslEngine.getSSLParameters() and inspect what is the SNI name to be sent. The same should be done in the OpenSSL provider as well. Currently even though the the SNI name is sent by the OpenSSL provider during handshake when the peerHost is specified, it is missing from the parameters.
Modification:
Set the sniHostNames field when SNI is to be used. Also verifies the peer is actually a hostname before setting it as the SNI name, which is consistent with JDK SSL provider's behavior.
Result:
SslEngine using the OpenSSL provider created in client mode with peerHost will initialize sniHostNames with the peerHost.
Calling SslEngine.getSSLParameters().getServerNames() will return a list that contains that name.
Motivation:
We missed to do a null check before trying to destroy the OpenSslSessionContext, which could lead to a NPE.
Modifications:
Add null check and tests.
Result:
Fix https://github.com/netty/netty/issues/8170.
Motivation:
We should allow to also validate sni hostname which contains for example underscore when using our native SSL impl. The JDK implementation does this as well.
Modifications:
- Construct the SNIHostName via byte[] and not String.
- Add unit test
Result:
Fixes https://github.com/netty/netty/issues/8144.
Motivation:
a137291ad1 introduced a way to get the most speed out of OpenSSL by not only caching keymaterial but pre-compute these. The problem was we missed to check for null before doing an instanceof check and then a cast which could lead to a NPE as we tried to cast null to Exception and throw it.
Modifications:
Add null check and unit test.
Result:
No more NPE when keymaterial was not found for requested alias.
* Add OpenSslX509KeyManagerFactory which makes it even easier for people to get the maximum performance when using OpenSSL / LibreSSL / BoringSSL with netty.
Motivation:
To make it even easier for people to get the maximum performance when using native SSL we should provide our own KeyManagerFactory implementation that people can just use to configure their key material.
Modifications:
- Add OpenSslX509KeyManagerFactory which users can use for maximum performance with native SSL
- Refactor some internal code to re-use logic and not duplicate it.
Result:
Easier to get the max performance out of native SSL implementation.
Motivation:
As the used OpenSSL version may not support hostname validation we should only really call SSL.setHostNameValidation(...) if we detect that its needed.
Modifications:
Only call SSL.setHostNameValidation if it was disabled before and now it needs to be enabled or if it was enabled before and it should be disabled now.
Result:
Less risk of an exception when using an OpenSSL version that does not support hostname validation.
Motivation:
OpenSSL allows to use a custom engine for its cryptographic operations. We should allow the user to make use of it if needed.
See also: https://www.openssl.org/docs/man1.0.2/crypto/engine.html.
Modifications:
Add new system property which can be used to specify the engine to use (null is the default and will use the build in default impl).
Result:
More flexible way of using OpenSSL.
Motiviation:
During profiling it showed that a lot of time during the handshake is spent by parsing the key / chain over and over again. We should cache these parsed structures if possible to reduce the overhead during handshake.
Modification:
- Use new APIs provided by https://github.com/netty/netty-tcnative/pull/360.
- Introduce OpensslStaticX509KeyManagerFactory which allows to wrap another KeyManagerFactory and caches the key material provided by it.
Result:
In benchmarks handshake times have improved by 30 %.
Motivation
There is a cost to concatenating strings and calling methods that will be wasted if the Logger's level is not enabled.
Modifications
Check if Log level is enabled before producing log statement. These are just a few cases found by RegEx'ing in the code.
Result
Tiny bit more efficient code.
Motivation:
When we build the key-material we should use the ByteBufAllocator used by the ReferenceCountedOpenSslEngine when possible.
Modifications:
Whenever we have access to the ReferenceCountedOpenSslEngine we use its allocator.
Result:
Use correct allocator
Motivation:
We previously did not correctly take into account when we could not wrap (and so produce) the full SSL record with an alert when the SSLEngine was closed.
There are two problems here:
- If we call wrap(...) with an empty dst buffer after closeOutbound() was called we will not notify the user if we could not store the whole SSLRecord into the dst buffer and so we may produce incomplete SSLRecords
Modifications:
Add unit test which failed before.
Result:
Correctly handle the case when the dst buffer is not big enough and and alert needs to be produced.
Motivation:
We sometimes did not correctly detect when a protocol is not enabled when using netty-tcnative as we did not take into account when the option flag is 0 (as for example in BoringSSL for SSLv2).
Modifications:
- Correctly take an option flag with 0 into account.
- Add unit tests.
Result:
Fixes https://github.com/netty/netty/issues/7935.
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:
Sometimes it's useful to disable native transports / native ssl to debug a problem. We should allow to do so with a system property so people not need to adjust code for this.
Modifications:
Add system properties which allow to disable native transport and native ssl.
Result:
Easier to disable native code usage without code changes.
