Add API to access SSL session

http-server-netty/src/main/java/io/micronaut/http/server/netty/HttpPipelineBuilder.java

@@ -78,14 +78,13 @@
 import org.slf4j.LoggerFactory;
 
 import javax.net.ssl.SSLEngine;
-import javax.net.ssl.SSLPeerUnverifiedException;
+import javax.net.ssl.SSLSession;
 import java.io.Closeable;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import java.nio.channels.ClosedChannelException;
-import java.security.cert.Certificate;
 import java.time.Duration;
 import java.time.Instant;
 import java.util.Optional;
@@ -106,8 +105,8 @@
 final class HttpPipelineBuilder implements Closeable {
     static final Supplier<AttributeKey<StreamPipeline>> STREAM_PIPELINE_ATTRIBUTE =
         SupplierUtil.memoized(() -> AttributeKey.newInstance("stream-pipeline"));
-    static final Supplier<AttributeKey<Supplier<Certificate>>> CERTIFICATE_SUPPLIER_ATTRIBUTE =
-        SupplierUtil.memoized(() -> AttributeKey.newInstance("certificate-supplier"));
+    static final Supplier<AttributeKey<Supplier<SSLSession>>> SSL_SESSION_ATTRIBUTE =
+        SupplierUtil.memoized(() -> AttributeKey.newInstance("ssl-session"));
 
     private static final Logger LOG = LoggerFactory.getLogger(HttpPipelineBuilder.class);
 
@@ -194,19 +193,8 @@ SslHandler makeNormal(ByteBufAllocator alloc) {
             return sslHandler;
         }
 
-        /**
-         * Create a supplier that looks up the peer cert of this connection ({@link #CERTIFICATE_SUPPLIER_ATTRIBUTE}).
-         *
-         * @return The supplier
-         */
-        Supplier<Certificate> findPeerCert() {
-            return SupplierUtil.memoized(() -> {
-                try {
-                    return (quicSslEngine == null ? sslHandler.engine() : quicSslEngine).getSession().getPeerCertificates()[0];
-                } catch (SSLPeerUnverifiedException ex) {
-                    return null;
-                }
-            });
+        Supplier<SSLSession> findSslSession() {
+            return SupplierUtil.memoized(() -> (quicSslEngine == null ? sslHandler.engine() : quicSslEngine).getSession());
         }
 
         HttpPipelineBuilder pipelineBuilder() {
@@ -673,7 +661,7 @@ private void insertHttp2DownstreamHandlers() {
         private void insertMicronautHandlers() {
             channel.attr(STREAM_PIPELINE_ATTRIBUTE.get()).set(this);
             if (sslHandler != null) {
-                channel.attr(CERTIFICATE_SUPPLIER_ATTRIBUTE.get()).set(sslHandler.findPeerCert());
+                channel.attr(SSL_SESSION_ATTRIBUTE.get()).set(sslHandler.findSslSession());
             }
 
             Optional<NettyServerWebSocketUpgradeHandler> webSocketUpgradeHandler = embeddedServices.getWebSocketUpgradeHandler(server);
@@ -699,7 +687,7 @@ void afterHttp2ServerHandlerSetUp() {
             httpVersion = HttpVersion.HTTP_2_0;
             channel.attr(STREAM_PIPELINE_ATTRIBUTE.get()).set(this);
             if (sslHandler != null) {
-                channel.attr(CERTIFICATE_SUPPLIER_ATTRIBUTE.get()).set(sslHandler.findPeerCert());
+                channel.attr(SSL_SESSION_ATTRIBUTE.get()).set(sslHandler.findSslSession());
             }
         }
 

http-server-netty/src/main/java/io/micronaut/http/server/netty/NettyHttpRequest.java

@@ -91,11 +91,11 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.net.ssl.SSLSession;
 import java.net.InetSocketAddress;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.nio.charset.Charset;
-import java.security.cert.Certificate;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
@@ -397,8 +397,8 @@ public HttpRequest<T> setAttribute(CharSequence name, Object value) {
     }
 
     @Override
-    public Optional<Certificate> getCertificate() {
-        Supplier<Certificate> sup = channelHandlerContext.channel().attr(HttpPipelineBuilder.CERTIFICATE_SUPPLIER_ATTRIBUTE.get()).get();
+    public Optional<SSLSession> getSslSession() {
+        Supplier<SSLSession> sup = channelHandlerContext.channel().attr(HttpPipelineBuilder.SSL_SESSION_ATTRIBUTE.get()).get();
         return sup == null ? Optional.empty() : Optional.ofNullable(sup.get());
     }
 

http/src/main/java/io/micronaut/http/HttpRequest.java

@@ -19,6 +19,8 @@
 import io.micronaut.core.annotation.Nullable;
 import io.micronaut.http.cookie.Cookies;
 
+import javax.net.ssl.SSLPeerUnverifiedException;
+import javax.net.ssl.SSLSession;
 import java.net.InetSocketAddress;
 import java.net.URI;
 import java.security.Principal;
@@ -179,7 +181,28 @@ default Optional<Locale> getLocale() {
      */
     @SuppressWarnings("deprecation")
     default Optional<Certificate> getCertificate() {
-        return this.getAttribute(HttpAttributes.X509_CERTIFICATE, Certificate.class);
+        Optional<Certificate> attribute = this.getAttribute(HttpAttributes.X509_CERTIFICATE, Certificate.class);
+        if (attribute.isPresent()) {
+            return attribute;
+        }
+        Optional<SSLSession> session = getSslSession();
+        if (session.isPresent()) {
+            try {
+                return Optional.of(session.get().getPeerCertificates()[0]);
+            } catch (SSLPeerUnverifiedException e) {
+                // won't return unverified cert
+            }
+        }
+        return Optional.empty();
+    }
+
+    /**
+     * Get the SSL session used for the connection to the client, if available.
+     *
+     * @return The session
+     */
+    default Optional<SSLSession> getSslSession() {
+        return Optional.empty();
     }
 
     /**

http/src/main/java/io/micronaut/http/HttpRequestWrapper.java

@@ -18,6 +18,7 @@
 import io.micronaut.core.annotation.NonNull;
 import io.micronaut.http.cookie.Cookies;
 
+import javax.net.ssl.SSLSession;
 import java.net.InetSocketAddress;
 import java.net.URI;
 import java.security.Principal;
@@ -84,6 +85,11 @@ public Optional<Certificate> getCertificate() {
         return getDelegate().getCertificate();
     }
 
+    @Override
+    public Optional<SSLSession> getSslSession() {
+        return getDelegate().getSslSession();
+    }
+
     @Override
     public Cookies getCookies() {
         return getDelegate().getCookies();