【发布时间】：2018-12-18 11:00:46
【问题描述】：
我使用的是 Netty 4.1.25。我从我的代码中的pem 文件创建了一个X509Certificate。使用该证书，我像这样设置 SslHandler：
SslContext context = SslContextBuilder.forClient().trustManager( certificate ).build();
pipeline.addLast( "ssl", context.newHandler( socketChannel.alloc() ) );
当证书是服务器上的确切证书时（服务器是 IoT 设备，但可能无关紧要），这可以正常工作。
但是，当我创建自己的根证书并且：
- 服务器有一个信任根证书的证书
- Netty 应用使用根证书
然后我得到这个异常：
io.netty.handler.codec.DecoderException: javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:459) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:647) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:547) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:501) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:461) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
Caused by: javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:128) ~[na:na]
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:321) ~[na:na]
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:264) ~[na:na]
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:259) ~[na:na]
at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:642) ~[na:na]
at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.onCertificate(CertificateMessage.java:461) ~[na:na]
at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.consume(CertificateMessage.java:361) ~[na:na]
at java.base/sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:392) ~[na:na]
at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:444) ~[na:na]
at java.base/sun.security.ssl.SSLEngineImpl$DelegatedTask$DelegatedAction.run(SSLEngineImpl.java:1065) ~[na:na]
at java.base/sun.security.ssl.SSLEngineImpl$DelegatedTask$DelegatedAction.run(SSLEngineImpl.java:1052) ~[na:na]
at java.base/java.security.AccessController.doPrivileged(Native Method) ~[na:na]
at java.base/sun.security.ssl.SSLEngineImpl$DelegatedTask.run(SSLEngineImpl.java:999) ~[na:na]
at io.netty.handler.ssl.SslHandler.runDelegatedTasks(SslHandler.java:1435) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1343) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1177) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1221) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
... 16 common frames omitted
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at java.base/sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:385) ~[na:na]
at java.base/sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:290) ~[na:na]
at java.base/sun.security.validator.Validator.validate(Validator.java:264) ~[na:na]
at java.base/sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:321) ~[na:na]
at java.base/sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:279) ~[na:na]
at java.base/sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:141) ~[na:na]
at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:620) ~[na:na]
... 30 common frames omitted
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at java.base/sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141) ~[na:na]
at java.base/sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126) ~[na:na]
at java.base/java.security.cert.CertPathBuilder.build(CertPathBuilder.java:297) ~[na:na]
at java.base/sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380) ~[na:na]
... 36 common frames omitted
为了测试，我还使用了 SslContextBuilder 的选项来直接使用TrustManagerFactory 而不是证书：
TrustManagerFactory factory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
factory.init(certificateService.getKeyStore());
SslContext context = SslContextBuilder.forClient().trustManager(factory).build();
然而，这会产生同样的问题。
有趣的是，这个物联网设备还有一个使用相同证书的网络界面。当我使用相同的 TrustManagerFactory 打开此 URL 时，这可以正常工作：
SSLContext sc = SSLContext.getInstance("TLSv1.2");
sc.init(null, factory.getTrustManagers(), new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
URL url = new URL("https://10.65.101.155");
HttpsURLConnection urlConnection = (HttpsURLConnection)url.openConnection();
使用urlConnection可以打印网页内容，查看证书信息。
我已经使用-Djava.security.debug=all 运行过，但这似乎有很多我不太了解的信息。
为什么它可以通过 URL 工作，但不能通过 Netty 使用相同的 TrustManagerFactory 工作？我可以在 Netty 方面做些什么来进一步调试吗？是否可以选择打印 Netty 从服务器收到的证书？
【问题讨论】：
-
您尝试使用
SslContext.newHandler(ByteBufAllocator alloc, String peerHost, int peerPort)吗？ -
@NormanMaurer 是的，不幸的是同样的结果。
-
@NormanMaurer 现在看答案，最终不是 Netty 问题。