Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
xwiki-platform-core/xwiki-platform-like/xwiki-platform-like-ui/pom.xml
### 代码内容：
<?xml version="1.0" encoding="UTF-8"?>

<!--
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
-->

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.xwiki.platform</groupId>
    <artifactId>xwiki-platform-like</artifactId>
    <version>15.2-SNAPSHOT</version>
  </parent>
  <artifactId>xwiki-platform-like-ui</artifactId>
  <name>XWiki Platform - Like - UI</name>
  <description>Like and unlike XWiki entities.</description>
  <packaging>xar</packaging>
  <properties>
    <!-- Name to display by the Extension Manager -->
    <xwiki.extension.name>Like Application</xwiki.extension.name>
    <xwiki.extension.category>application</xwiki.extension.category>
    <xwiki.extension.icon>heart</xwiki.extension.icon>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-like-api</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-like-notifications</artifactId>
      <version>${project.version}</version>
    </dependency>
    <!-- Runtime dependencies. -->
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-livedata-macro</artifactId>
      <version>${project.version}</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-livedata-livetable</artifactId>
      <version>${project.version}</version>
      <scope>runtime</scope>
    </dependency>
    <!-- Required to display the like pages user profile UIX. -->
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-user-profile-ui</artifactId>
      <type>xar</type>
      <version>${project.version}</version>
      <scope>runtime</scope>
      <optional>true</optional>
    </dependency>
  </dependencies>
</project>

## 内容2
### 文件路径：
xwiki-platform-core/xwiki-platform-like/xwiki-platform-like-ui/src/main/resources/XWiki/Like/Code/LiveTableResultPage.xml
### 代码内容：
<?xml version="1.1" encoding="UTF-8"?>

<!--
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
-->

<xwikidoc version="1.4" reference="XWiki.Like.Code.LiveTableResultPage" locale="">
  <web>XWiki.Like.Code</web>
  <name>LiveTableResultPage</name>
  <language/>
  <defaultLanguage/>
  <translation>0</translation>
  <creator>xwiki:XWiki.Admin</creator>
  <parent>XWiki.Like.Code</parent>
  <author>xwiki:XWiki.Admin</author>
  <contentAuthor>xwiki:XWiki.Admin</contentAuthor>
  <version>1.1</version>
  <title/>
  <comment/>
  <minorEdit>false</minorEdit>
  <syntaxId>xwiki/2.1</syntaxId>
  <hidden>true</hidden>
  <content>{{velocity}}
#if ($xcontext.action == 'get')
  #template('hierarchy_macros.vm')
  #if("$!{request.xpage}" == 'plain')
    $response.setContentType('application/json')
  #end
  #if($request.user)
    #set ($userReference = $request.user)
  #else
    #set ($userReference = $services.user.currentUserReference)
  #end
  ##==============================
  ## Offset = item # at which to start displaying data
  ##==============================
  #set($offset = $numbertool.toNumber($request.get('offset')))
  ## offset starts from 0 in velocity and 1 in javascript
  #set($offset = $offset - 1)
  #if($offset < 0)
    #set($offset = 0)
  #end
  ##==================
  ## Limit = # of items to display
  ##==================
  #set($limit = $numbertool.toNumber($request.get('limit')))
  #set ($likedPages = $services.like.getUserLikes($userReference, $offset, $limit))
  #set ($optUserLikes = $services.like.countUserLikes($userReference))
  #if ($optUserLikes.isPresent())
    #set ($totalRows = $optUserLikes.get())
  #else
    #set ($totalRows = $likedPages.size())
  #end
  ##==========
  ## Sort direction
  ##==========
  #set($order = "$!request.sort")
  #if($order != '')
    #set($orderDirection = "$!{request.get('dir').toLowerCase()}")
    #if("$!orderDirection" != '' && "$!orderDirection" != 'asc')
      #set($orderDirection = 'desc')
    #end
  #end
  #set ($pagesRows = [])
  #foreach($likedPage in $likedPages)
    #set ($likedDoc = $xwiki.getDocument($likedPage))
    #set ($optDocumentLikes = $services.like.getLikes($likedPage))
    #if ($optDocumentLikes.isPresent())
      #set ($documentLikes = $optDocumentLikes.get())
    #else
      #set ($documentLikes = "N/A")
    #end
    ## code inspired from getdocuments.vm
    #set ($viewable = $xwiki.hasAccessLevel('view', $xcontext.user, $services.model.serialize($likedPage, "default")))
    #set ($row = {'doc_viewable' : $viewable})
    #if (!$viewable)
      #set ($discard = $row.put('doc_fullName', $likedDoc.fullName))
    #else
      #set ($translatedDoc = $likedDoc.translatedDocument)
      #set ($fullname = $services.model.serialize($likedDoc.documentReference, 'default'))
      #set ($discard = $row.put('doc_name', $likedDoc.documentReference.name))
      #set ($discard = $row.put('doc_fullName', $fullname))
      #set ($location = "#hierarchy($likedDoc.documentReference, {'limit': 5, 'plain': false, 'local': true, 'displayTitle': false})")
      #set ($discard = $row.put('doc_location', $location))
      #set ($discard = $row.put('doc_space', $likedDoc.space))
      #set ($discard = $row.put('doc_url', $xwiki.getURL($likedDoc)))
      #set ($discard = $row.put('doc_space_url',
        $xwiki.getURL($services.model.createDocumentReference($!likedDoc.wiki, $!likedDoc.space, 'WebHome'))))
      #set ($discard = $row.put('doc_wiki', $likedDoc.wiki))
      #set ($discard = $row.put('doc_wiki_url', $xwiki.getURL($services.model.resolveDocument('', 'default',
        $likedDoc.documentReference.extractReference('WIKI')))))
      #set ($discard = $row.put('doc_author_url', $xwiki.getURL($translatedDoc.author)))
      #set ($discard = $row.put('doc_date', $xwiki.formatDate($translatedDoc.date)))
      #set ($discard = $row.put('doc_title', $translatedDoc.plainTitle))
      #set ($rawTitle = $translatedDoc.title)
      #if ($rawTitle != $row['doc_title'])
        #set ($discard = $row.put('doc_title_raw', $rawTitle))
      #end
      #set ($discard = $row.put('doc_author', $xwiki.getUserName($translatedDoc.author, false)))
      #set ($discard = $row.put('doc_creationDate', $xwiki.formatDate($translatedDoc.creationDate)))
      #set ($discard = $row.put('doc_creator', $xwiki.getUserName($translatedDoc.creator, false)))
    #end
    #set ($discard = $row.put('like', $documentLikes))
    #set ($discard = $pagesRows.add($row))
  #end
  #set ($newOffset = $offset + 1)
  ## ===
  ## JSON
  ## ===
  {
    "totalrows": $totalRows,
    "returnedrows":  $pagesRows.size(),
    "offset": $newOffset,
    "reqNo": $numbertool.toNumber($request.reqNo),
    "rows": $jsontool.serialize($pagesRows)
  }
#end
{{/velocity}}</content>
</xwikidoc>

Output:
【漏洞类型】路径遍历漏洞
【严重性】High
【漏洞摘要】这是一个路径遍历漏洞。在`LiveTableResultPage.xml`文件中，用户输入的`$request.user`参数被直接用于获取文档，而没有进行适当的验证或清理。如果攻击者能够通过这个参数注入特殊字符（例如，点号`.`），则可能访问到不应该访问的文档。
【关键代码模式】$xwiki.getDocument($request.user)
【修复方法说明】修复方法通过设置`{{velocity wiki="false"}}`来限制Velocity脚本的执行环境，防止潜在的路径遍历攻击。此外，增加了测试依赖以确保未来的安全审计能够覆盖测试环境。


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
xwiki-platform-core/xwiki-platform-web/xwiki-platform-web-templates/src/main/resources/templates/rendercontent.vm
### 代码内容：
## ---------------------------------------------------------------------------
## See the NOTICE file distributed with this work for additional
## information regarding copyright ownership.
##
## This is free software; you can redistribute it and/or modify it
## under the terms of the GNU Lesser General Public License as
## published by the Free Software Foundation; either version 2.1 of
## the License, or (at your option) any later version.
##
## This software is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public
## License along with this software; if not, write to the Free
## Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
## 02110-1301 USA, or see the FSF site: http://www.fsf.org.
## ---------------------------------------------------------------------------
############################################################################
## Render current document content with some possible
## URL parameters:
## * outputSyntax: the syntax name to use to render the XDOM,
##                 if not provided use xhtml/1.0
## * outputVersion: the syntax version to use to render the XDOM
##                  if not provided use the last version of the outputSyntax
## * outputTitle: if true then also output the title
##
############################################################################
#if ($request.outputTitle == 'true')
  $services.progress.pushLevel(3)
#else
  $services.progress.pushLevel(1)
#end
$services.progress.startStep('Compute the content to display')
## Make sure we don't escape the content since we want HTML to be rendered
#set ($noEscapeContent = true)
#template("contentvars.vm")
$services.progress.endStep()
#if ($request.outputTitle == 'true')
  $services.progress.startStep('Compute title to display and modify rendered content accordingly')
  #template("titlevars.vm")
  $services.progress.endStep()

    $xcontext.dropPermissions()

$titleToDisplay

#end
#if ("$!exception" != '')
  $exceptiontool.getStackTrace($exception)
#else
  $renderedContent
#end
#if ($request.outputTitle == 'true')

#end
$services.progress.popLevel()


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
handler/src/main/java/io/netty/handler/ssl/AbstractSniHandler.java
### 代码内容：
package io.netty.handler.ssl;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.CharsetUtil;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.ScheduledFuture;

import java.util.Locale;
import java.util.concurrent.TimeUnit;

import static io.netty.util.internal.ObjectUtil.checkPositiveOrZero;

/**
 *
Enables SNI
 * (Server Name Indication) extension for server side SSL. For clients
 * support SNI, the server could have multiple host name bound on a single IP.
 * The client will send host name in the handshake data so server could decide
 * which certificate to choose for the host name.

 */
public abstract class AbstractSniHandler<T> extends SslClientHelloHandler<T> {

    private static String extractSniHostname(ByteBuf in) {
        // See https://tools.ietf.org/html/rfc5246#section-7.4.1.2
        //
        // Decode the ssl client hello packet.
        //
        // struct {
        //    ProtocolVersion client_version;
        //    Random random;
        //    SessionID session_id;
        //    CipherSuite cipher_suites<2..2^16-2>;
        //    CompressionMethod compression_methods<1..2^8-1>;
        //    select (extensions_present) {
        //        case false:
        //            struct {};
        //        case true:
        //            Extension extensions<0..2^16-1>;
        //    };
        // } ClientHello;
        //

        // We have to skip bytes until SessionID (which sum to 34 bytes in this case).
        int offset = in.readerIndex();
        int endOffset = in.writerIndex();
        offset += 34;

        if (endOffset - offset >= 6) {
            final int sessionIdLength = in.getUnsignedByte(offset);
            offset += sessionIdLength + 1;

            final int cipherSuitesLength = in.getUnsignedShort(offset);
            offset += cipherSuitesLength + 2;

            final int compressionMethodLength = in.getUnsignedByte(offset);
            offset += compressionMethodLength + 1;

            final int extensionsLength = in.getUnsignedShort(offset);
            offset += 2;
            final int extensionsLimit = offset + extensionsLength;

            // Extensions should never exceed the record boundary.
            if (extensionsLimit <= endOffset) {
                while (extensionsLimit - offset >= 4) {
                    final int extensionType = in.getUnsignedShort(offset);
                    offset += 2;

                    final int extensionLength = in.getUnsignedShort(offset);
                    offset += 2;

                    if (extensionsLimit - offset < extensionLength) {
                        break;
                    }

                    // SNI
                    // See https://tools.ietf.org/html/rfc6066#page-6
                    if (extensionType == 0) {
                        offset += 2;
                        if (extensionsLimit - offset < 3) {
                            break;
                        }

                        final int serverNameType = in.getUnsignedByte(offset);
                        offset++;

                        if (serverNameType == 0) {
                            final int serverNameLength = in.getUnsignedShort(offset);
                            offset += 2;

                            if (extensionsLimit - offset < serverNameLength) {
                                break;
                            }

                            final String hostname = in.toString(offset, serverNameLength, CharsetUtil.US_ASCII);
                            return hostname.toLowerCase(Locale.US);
                        } else {
                            // invalid enum value
                            break;
                        }
                    }

                    offset += extensionLength;
                }
            }
        }
        return null;
    }

    protected final long handshakeTimeoutMillis;
    private ScheduledFuture<?> timeoutFuture;
    private String hostname;

    /**
     * @param handshakeTimeoutMillis the handshake timeout in milliseconds
     */
    protected AbstractSniHandler(long handshakeTimeoutMillis) {
        this.handshakeTimeoutMillis = checkPositiveOrZero(handshakeTimeoutMillis, "handshakeTimeoutMillis");
    }

    public AbstractSniHandler() {
        this(0L);
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        if (ctx.channel().isActive()) {
            checkStartTimeout(ctx);
        }
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        ctx.fireChannelActive();
        checkStartTimeout(ctx);
    }

    private void checkStartTimeout(final ChannelHandlerContext ctx) {
        if (handshakeTimeoutMillis <= 0 || timeoutFuture != null) {
            return;
        }
        timeoutFuture = ctx.executor().schedule(new Runnable() {
            @Override
            public void run() {
                if (ctx.channel().isActive()) {
                    SslHandshakeTimeoutException exception = new SslHandshakeTimeoutException(
                        "handshake timed out after " + handshakeTimeoutMillis + "ms");
                    ctx.fireUserEventTriggered(new SniCompletionEvent(exception));
                    ctx.close();
                }
            }
        }, handshakeTimeoutMillis, TimeUnit.MILLISECONDS);
    }

    @Override
    protected Future<T> lookup(ChannelHandlerContext ctx, ByteBuf clientHello) throws Exception {
        hostname = clientHello == null ? null : extractSniHostname(clientHello);

        return lookup(ctx, hostname);
    }

    @Override
    protected void onLookupComplete(ChannelHandlerContext ctx, Future<T> future) throws Exception {
        if (timeoutFuture != null) {
            timeoutFuture.cancel(false);
        }
        try {
            onLookupComplete(ctx, hostname, future);
        } finally {
            fireSniCompletionEvent(ctx, hostname, future);
        }
    }

    /**
     * Kicks off a lookup for the given SNI value and returns a {@link Future} which in turn will
     * notify the {@link #onLookupComplete(ChannelHandlerContext, String, Future)} on completion.
     *
     * @see #onLookupComplete(ChannelHandlerContext, String, Future)
     */
    protected abstract Future<T> lookup(ChannelHandlerContext ctx, String hostname) throws Exception;

    /**
     * Called upon completion of the {@link #lookup(ChannelHandlerContext, String)} {@link Future}.
     *
     * @see #lookup(ChannelHandlerContext, String)
     */
    protected abstract void onLookupComplete(ChannelHandlerContext ctx,
                                             String hostname, Future<T> future) throws Exception;

    private static void fireSniCompletionEvent(ChannelHandlerContext ctx, String hostname, Future<?> future) {
        Throwable cause = future.cause();
        if (cause == null) {
            ctx.fireUserEventTriggered(new SniCompletionEvent(hostname));
        } else {
            ctx.fireUserEventTriggered(new SniCompletionEvent(hostname, cause));
        }
    }
}

## 内容2
### 文件路径：
handler/src/main/java/io/netty/handler/ssl/SniHandler.java
### 代码内容：
package io.netty.handler.ssl;

import io.netty.buffer.ByteBufAllocator;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.DecoderException;
import io.netty.util.AsyncMapping;
import io.netty.util.DomainNameMapping;
import io.netty.util.Mapping;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.Promise;
import io.netty.util.internal.ObjectUtil;
import io.netty.util.internal.PlatformDependent;

/**
 *
Enables SNI
 * (Server Name Indication) extension for server side SSL. For clients
 * support SNI, the server could have multiple host name bound on a single IP.
 * The client will send host name in the handshake data so server could decide
 * which certificate to choose for the host name.

 */
public class SniHandler extends AbstractSniHandler<SslContext> {
    private static final Selection EMPTY_SELECTION = new Selection(null, null);

    protected final AsyncMapping<String, SslContext> mapping;

    private volatile Selection selection = EMPTY_SELECTION;

    /**
     * Creates a SNI detection handler with configured {@link SslContext}
     * maintained by {@link Mapping}
     *
     * @param mapping the mapping of domain name to {@link SslContext}
     */
    public SniHandler(Mapping<? super String, ? extends SslContext> mapping) {
        this(new AsyncMappingAdapter(mapping));
    }

    /**
     * Creates a SNI detection handler with configured {@link SslContext}
     * maintained by {@link Mapping}
     *
     * @param mapping the mapping of domain name to {@link SslContext}
     * @param handshakeTimeoutMillis the handshake timeout in milliseconds
     */
    public SniHandler(Mapping<? super String, ? extends SslContext> mapping, long handshakeTimeoutMillis) {
        this(new AsyncMappingAdapter(mapping), handshakeTimeoutMillis);
    }

    /**
     * Creates a SNI detection handler with configured {@link SslContext}
     * maintained by {@link DomainNameMapping}
     *
     * @param mapping the mapping of domain name to {@link SslContext}
     */
    public SniHandler(DomainNameMapping<? extends SslContext> mapping) {
        this((Mapping<String, ? extends SslContext>) mapping);
    }

    /**
     * Creates a SNI detection handler with configured {@link SslContext}
     * maintained by {@link AsyncMapping}
     *
     * @param mapping the mapping of domain name to {@link SslContext}
     */
    @SuppressWarnings("unchecked")
    public SniHandler(AsyncMapping<? super String, ? extends SslContext> mapping) {
        this(mapping, 0L);
    }

    /**
     * Creates a SNI detection handler with configured {@link SslContext}
     * maintained by {@link AsyncMapping}
     *
     * @param mapping the mapping of domain name to {@link SslContext}
     * @param handshakeTimeoutMillis the handshake timeout in milliseconds
     */
    @SuppressWarnings("unchecked")
    public SniHandler(AsyncMapping<? super String, ? extends SslContext> mapping, long handshakeTimeoutMillis) {
        super(handshakeTimeoutMillis);
        this.mapping = (AsyncMapping<String, SslContext>) ObjectUtil.checkNotNull(mapping, "mapping");
    }

    /**
     * @return the selected hostname
     */
    public String hostname() {
        return selection.hostname;
    }

    /**
     * @return the selected {@link SslContext}
     */
    public SslContext sslContext() {
        return selection.context;
    }

    /**
     * The default implementation will simply call {@link AsyncMapping#map(Object, Promise)} but
     * users can override this method to implement custom behavior.
     *
     * @see AsyncMapping#map(Object, Promise)
     */
    @Override
    protected Future<SslContext> lookup(ChannelHandlerContext ctx, String hostname) throws Exception {
        return mapping.map(hostname, ctx.executor().<SslContext>newPromise());
    }

    @Override
    protected final void onLookupComplete(ChannelHandlerContext ctx,
                                          String hostname, Future<SslContext> future) throws Exception {
        if (!future.isSuccess()) {
            final Throwable cause = future.cause();
            if (cause instanceof Error) {
                throw (Error) cause;
            }
            throw new DecoderException("failed to get the SslContext for " + hostname, cause);
        }

        SslContext sslContext = future.getNow();
        selection = new Selection(sslContext, hostname);
        try {
            replaceHandler(ctx, hostname, sslContext);
        } catch (Throwable cause) {
            selection = EMPTY_SELECTION;
            PlatformDependent.throwException(cause);
        }
    }

    /**
     * The default implementation of this method will simply replace {@code this} {@link SniHandler}
     * instance with a {@link SslHandler}. Users may override this method to implement custom behavior.
     *
     * Please be aware that this method may get called after a client has already disconnected and
     * custom implementations must take it into consideration when overriding this method.
     *
     * It's also possible for the hostname argument to be {@code null}.
     */
    protected void replaceHandler(ChannelHandlerContext ctx, String hostname, SslContext sslContext) throws Exception {
        SslHandler sslHandler = null;
        try {
            sslHandler = newSslHandler(sslContext, ctx.alloc());
            ctx.pipeline().replace(this, SslHandler.class.getName(), sslHandler);
            sslHandler = null;
        } finally {
            // Since the SslHandler was not inserted into the pipeline the ownership of the SSLEngine was not
            // transferred to the SslHandler.
            // See https://github.com/netty/netty/issues/5678
            if (sslHandler != null) {
                ReferenceCountUtil.safeRelease(sslHandler.engine());
            }
        }
    }

    /**
     * Returns a new {@link SslHandler} using the given {@link SslContext} and {@link ByteBufAllocator}.
     * Users may override this method to implement custom behavior.
     */
    protected SslHandler newSslHandler(SslContext context, ByteBufAllocator allocator) {
        SslHandler sslHandler = context.newHandler(allocator);
        sslHandler.setHandshakeTimeoutMillis(handshakeTimeoutMillis);
        return sslHandler;
    }

    private static final class AsyncMappingAdapter implements AsyncMapping<String, SslContext> {
        private final Mapping<? super String, ? extends SslContext> mapping;

        private AsyncMappingAdapter(Mapping<? super String, ? extends SslContext> mapping) {
            this.mapping = ObjectUtil.checkNotNull(mapping, "mapping");
        }

        @Override
        public Future<SslContext> map(String input, Promise<SslContext> promise) {
            final SslContext context;
            try {
                context = mapping.map(input);
            } catch (Throwable cause) {
                return promise.setFailure(cause);
            }
            return promise.setSuccess(context);
        }
    }

    private static final class Selection {
        final SslContext context;
        final String hostname;

        Selection(SslContext context, String hostname) {
            this.context = context;
            this.hostname = hostname;
        }
    }
}

## 内容3
### 文件路径：
handler/src/main/java/io/netty/handler/ssl/SslClientHelloHandler.java
### 代码内容：
package io.netty.handler.ssl;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandler;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.DecoderException;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.FutureListener;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.net.SocketAddress;
import java.util.List;

/**
 * {@link ByteToMessageDecoder} which allows to be notified once a full {@code ClientHello} was received.
 */
public abstract class SslClientHelloHandler<T> extends ByteToMessageDecoder implements ChannelOutboundHandler {

    private static final InternalLogger logger =
            InternalLoggerFactory.getInstance(SslClientHelloHandler.class);

    private boolean handshakeFailed;
    private boolean suppressRead;
    private boolean readPending;
    private ByteBuf handshakeBuffer;

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        if (!suppressRead && !handshakeFailed) {
            try {
                int readerIndex = in.readerIndex();
                int readableBytes = in.readableBytes();
                int handshakeLength = -1;

                // Check if we have enough data to determine the record type and length.
                while (readableBytes >= SslUtils.SSL_RECORD_HEADER_LENGTH) {
                    final int contentType = in.getUnsignedByte(readerIndex);
                    switch (contentType) {
                        case SslUtils.SSL_CONTENT_TYPE_CHANGE_CIPHER_SPEC:
                            // fall-through
                        case SslUtils.SSL_CONTENT_TYPE_ALERT:
                            final int len = SslUtils.getEncryptedPacketLength(in, readerIndex);

                            // Not an SSL/TLS packet
                            if (len == SslUtils.NOT_ENCRYPTED) {
                                handshakeFailed = true;
                                NotSslRecordException e = new NotSslRecordException(
                                        "not an SSL/TLS record: " + ByteBufUtil.hexDump(in));
                                in.skipBytes(in.readableBytes());
                                ctx.fireUserEventTriggered(new SniCompletionEvent(e));
                                SslUtils.handleHandshakeFailure(ctx, e, true);
                                throw e;
                            }
                            if (len == SslUtils.NOT_ENOUGH_DATA) {
                                // Not enough data
                                return;
                            }
                            // No ClientHello
                            select(ctx, null);
                            return;
                        case SslUtils.SSL_CONTENT_TYPE_HANDSHAKE:
                            final int majorVersion = in.getUnsignedByte(readerIndex + 1);
                            // SSLv3 or TLS
                            if (majorVersion == 3) {
                                int packetLength = in.getUnsignedShort(readerIndex + 3) +
                                        SslUtils.SSL_RECORD_HEADER_LENGTH;

                                if (readableBytes < packetLength) {
                                    // client hello incomplete; try again to decode once more data is ready.
                                    return;
                                } else if (packetLength == SslUtils.SSL_RECORD_HEADER_LENGTH) {
                                    select(ctx, null);
                                    return;
                                }

                                final int endOffset = readerIndex + packetLength;

                                // Let's check if we already parsed the handshake length or not.
                                if (handshakeLength == -1) {
                                    if (readerIndex + 4 > endOffset) {
                                        // Need more data to read HandshakeType and handshakeLength (4 bytes)
                                        return;
                                    }

                                    final int handshakeType = in.getUnsignedByte(readerIndex +
                                            SslUtils.SSL_RECORD_HEADER_LENGTH);

                                    // Check if this is a clientHello(1)
                                    // See https://tools.ietf.org/html/rfc5246#section-7.4
                                    if (handshakeType != 1) {
                                        select(ctx, null);
                                        return;
                                    }

                                    // Read the length of the handshake as it may arrive in fragments
                                    // See https://tools.ietf.org/html/rfc5246#section-7.4
                                    handshakeLength = in.getUnsignedMedium(readerIndex +
                                            SslUtils.SSL_RECORD_HEADER_LENGTH + 1);

                                    // Consume handshakeType and handshakeLength (this sums up as 4 bytes)
                                    readerIndex += 4;
                                    packetLength -= 4;

                                    if (handshakeLength + 4 + SslUtils.SSL_RECORD_HEADER_LENGTH <= packetLength) {
                                        // We have everything we need in one packet.
                                        // Skip the record header
                                        readerIndex += SslUtils.SSL_RECORD_HEADER_LENGTH;
                                        select(ctx, in.retainedSlice(readerIndex, handshakeLength));
                                        return;
                                    } else {
                                        if (handshakeBuffer == null) {
                                            handshakeBuffer = ctx.alloc().buffer(handshakeLength);
                                        } else {
                                            // Clear the buffer so we can aggregate into it again.
                                            handshakeBuffer.clear();
                                        }
                                    }
                                }

                                // Combine the encapsulated data in one buffer but not include the SSL_RECORD_HEADER
                                handshakeBuffer.writeBytes(in, readerIndex + SslUtils.SSL_RECORD_HEADER_LENGTH,
                                        packetLength - SslUtils.SSL_RECORD_HEADER_LENGTH);
                                readerIndex += packetLength;
                                readableBytes -= packetLength;
                                if (handshakeLength <= handshakeBuffer.readableBytes()) {
                                    ByteBuf clientHello = handshakeBuffer.setIndex(0, handshakeLength);
                                    handshakeBuffer = null;

                                    select(ctx, clientHello);
                                    return;
                                }
                                break;
                            }
                            // fall-through
                        default:
                            // not tls, ssl or application data
                            select(ctx, null);
                            return;
                    }
                }
            } catch (NotSslRecordException e) {
                // Just rethrow as in this case we also closed the channel and this is consistent with SslHandler.
                throw e;
            } catch (Exception e) {
                // unexpected encoding, ignore sni and use default
                if (logger.isDebugEnabled()) {
                    logger.debug("Unexpected client hello packet: " + ByteBufUtil.hexDump(in), e);
                }
                select(ctx, null);
            }
        }
    }

    private void releaseHandshakeBuffer() {
        releaseIfNotNull(handshakeBuffer);
        handshakeBuffer = null;
    }

    private static void releaseIfNotNull(ByteBuf buffer) {
        if (buffer != null) {
            buffer.release();
        }
    }

    private void select(final ChannelHandlerContext ctx, ByteBuf clientHello) throws Exception {
        final Future<T> future;
        try {
            future = lookup(ctx, clientHello);
            if (future.isDone()) {
                onLookupComplete(ctx, future);
            } else {
                suppressRead = true;
                final ByteBuf finalClientHello = clientHello;
                future.addListener(new FutureListener<T>() {
                    @Override
                    public void operationComplete(Future<T> future) {
                        releaseIfNotNull(finalClientHello);
                        try {
                            suppressRead = false;
                            try {
                                onLookupComplete(ctx, future);
                            } catch (DecoderException err) {
                                ctx.fireExceptionCaught(err);
                            } catch (Exception cause) {
                                ctx.fireExceptionCaught(new DecoderException(cause));
                            } catch (Throwable cause) {
                                ctx.fireExceptionCaught(cause);
                            }
                        } finally {
                            if (readPending) {
                                readPending = false;
                                ctx.read();
                            }
                        }
                    }
                });

                // Ownership was transferred to the FutureListener.
                clientHello = null;
            }
        } catch (Throwable cause) {
            PlatformDependent.throwException(cause);
        } finally {
            releaseIfNotNull(clientHello);
        }
    }

    @Override
    protected void handlerRemoved0(ChannelHandlerContext ctx) throws Exception {
        releaseHandshakeBuffer();

        super.handlerRemoved0(ctx);
    }

    /**
     * Kicks off a lookup for the given {@code ClientHello} and returns a {@link Future} which in turn will
     * notify the {@link #onLookupComplete(ChannelHandlerContext, Future)} on completion.
     *
     * See https://tools.ietf.org/html/rfc5246#section-7.4.1.2
     *
     *

     * struct {
     *    ProtocolVersion client_version;
     *    Random random;
     *    SessionID session_id;
     *    CipherSuite cipher_suites<2..2^16-2>;
     *    CompressionMethod compression_methods<1..2^8-1>;
     *    select (extensions_present) {
     *        case false:
     *            struct {};
     *        case true:
     *            Extension extensions<0..2^16-1>;
     *    };
     * } ClientHello;
     *

     *
     * @see #onLookupComplete(ChannelHandlerContext, Future)
     */
    protected abstract Future<T> lookup(ChannelHandlerContext ctx, ByteBuf clientHello) throws Exception;

    /**
     * Called upon completion of the {@link #lookup(ChannelHandlerContext, ByteBuf)} {@link Future}.
     *
     * @see #lookup(ChannelHandlerContext, ByteBuf)
     */
    protected abstract void onLookupComplete(ChannelHandlerContext ctx, Future<T> future) throws Exception;

    @Override
    public void read(ChannelHandlerContext ctx) throws Exception {
        if (suppressRead) {
            readPending = true;
        } else {
            ctx.read();
        }
    }

    @Override
    public void bind(ChannelHandlerContext ctx, SocketAddress localAddress, ChannelPromise promise) throws Exception {
        ctx.bind(localAddress, promise);
    }

    @Override
    public void connect(ChannelHandlerContext ctx, SocketAddress remoteAddress, SocketAddress localAddress,
                        ChannelPromise promise) throws Exception {
        ctx.connect(remoteAddress, localAddress, promise);
    }

    @Override
    public void disconnect(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
        ctx.disconnect(promise);
    }

    @Override
    public void close(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
        ctx.close(promise);
    }

    @Override
    public void deregister(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
        ctx.deregister(promise);
    }

    @Override
    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        ctx.write(msg, promise);
    }

    @Override
    public void flush(ChannelHandlerContext ctx) throws Exception {
        ctx.flush();
    }
}

Output:
【漏洞类型】高内存使用漏洞

【严重性】High

【漏洞摘要】该代码在解析ClientHello消息时，未对消息长度进行限制，理论上ClientHello可以达到16MB，这可能导致高内存使用和潜在的内存耗尽问题。具体表现为`extractSniHostname`函数中的`final int serverNameLength = in.getUnsignedShort(offset);`，`final String hostname = in.toString(offset, serverNameLength, CharsetUtil.US_ASCII);`等行，这些行在解码过程中直接读取了用户提供的数据长度，而没有进行任何长度校验。

【关键代码模式】
- `extractSniHostname`函数
- `in.getUnsignedShort(offset)`
- `in.toString(offset, serverNameLength, CharsetUtil.US_ASCII)`
- `ByteBuf`的读取操作

【修复方法说明】引入了一个新的构造函数，允许用户定义ClientHello消息的最大长度，并在解码过程中进行长度检查，防止过度分配内存。


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
xwiki-platform-core/xwiki-platform-help/pom.xml
### 代码内容：
<?xml version="1.0" encoding="UTF-8"?>

<!--
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
-->

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.xwiki.platform</groupId>
    <artifactId>xwiki-platform-core</artifactId>
    <version>15.1-SNAPSHOT</version>
  </parent>
  <artifactId>xwiki-platform-help</artifactId>
  <name>XWiki Platform - Help - Parent POM</name>
  <packaging>pom</packaging>
  <description>Provides help within your wiki and showcases the main XWiki features through demo content</description>
  <modules>
    <module>xwiki-platform-help-ui</module>
  </modules>
</project>

## 内容2
### 文件路径：
xwiki-platform-core/xwiki-platform-help/xwiki-platform-help-ui/src/main/resources/Help/TipsPanel/WebHome.xml
### 代码内容：
<?xml version="1.1" encoding="UTF-8"?>

<!--
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
-->

<xwikidoc version="1.3" reference="Help.TipsPanel.WebHome" locale="">
  <web>Help.TipsPanel</web>
  <name>WebHome</name>
  <language/>
  <defaultLanguage/>
  <translation>0</translation>
  <creator>xwiki:XWiki.Admin</creator>
  <parent>Panels.WebHome</parent>
  <author>xwiki:XWiki.Admin</author>
  <contentAuthor>xwiki:XWiki.Admin</contentAuthor>
  <version>1.1</version>
  <title>Tips Panel</title>
  <comment/>
  <minorEdit>false</minorEdit>
  <syntaxId>xwiki/2.1</syntaxId>
  <hidden>true</hidden>
  <content/>
  <object>
    <name>Help.TipsPanel.WebHome</name>
    <number>0</number>
    <className>Panels.PanelClass</className>
    <guid>bf93ea22-0a76-46aa-815c-e495094e631a</guid>
    <class>
      <name>Panels.PanelClass</name>
      <customClass/>
      <customMapping/>
      <defaultViewSheet/>
      <defaultEditSheet/>
      <defaultWeb/>
      <nameField/>
      <validationScript/>
      <async_cached>
        <defaultValue>0</defaultValue>
        <disabled>0</disabled>
        <displayFormType>select</displayFormType>
        <displayType/>
        <name>async_cached</name>
        <number>7</number>
        <prettyName>Cached</prettyName>
        <unmodifiable>0</unmodifiable>
        <classType>com.xpn.xwiki.objects.classes.BooleanClass</classType>
      </async_cached>
      <async_context>
        <cache>0</cache>
        <disabled>0</disabled>
        <displayType>select</displayType>
        <multiSelect>1</multiSelect>
        <name>async_context</name>
        <number>8</number>
        <prettyName>Context elements</prettyName>
        <relationalStorage>0</relationalStorage>
        <separator> </separator>
        <separators>|, </separators>
        <size>5</size>
        <unmodifiable>0</unmodifiable>
        <values>author=Author|doc.reference=Document|wiki=Wiki|request.parameters=Request parameters|request.url=Request URL|locale=Language|user=User</values>
        <classType>com.xpn.xwiki.objects.classes.StaticListClass</classType>
      </async_context>
      <async_enabled>
        <defaultValue>0</defaultValue>
        <disabled>0</disabled>
        <displayFormType>select</displayFormType>
        <displayType/>
        <name>async_enabled</name>
        <number>6</number>
        <prettyName>Asynchronous rendering</prettyName>
        <unmodifiable>0</unmodifiable>
        <classType>com.xpn.xwiki.objects.classes.BooleanClass</classType>
      </async_enabled>
      <category>
        <cache>0</cache>
        <disabled>0</disabled>
        <displayType>select</displayType>
        <multiSelect>0</multiSelect>
        <name>category</name>
        <number>1</number>
        <prettyName>Category</prettyName>
        <relationalStorage>0</relationalStorage>
        <separator> </separator>
        <separators>|, </separators>
        <size>1</size>
        <unmodifiable>0</unmodifiable>
        <values>Information|Navigation|Tools|Administration|Other</values>
        <classType>com.xpn.xwiki.objects.classes.StaticListClass</classType>
      </category>
      <content>
        <disabled>0</disabled>
        <editor>Text</editor>
        <name>content</name>
        <number>5</number>
        <prettyName>Executed Content</prettyName>
        <rows>25</rows>
        <size>120</size>
        <unmodifiable>0</unmodifiable>
        <classType>com.xpn.xwiki.objects.classes.TextAreaClass</classType>
      </content>
      <description>
        <disabled>0</disabled>
        <editor>Text</editor>
        <name>description</name>
        <number>2</number>
        <prettyName>Description</prettyName>
        <rows>5</rows>
        <size>40</size>
        <unmodifiable>0</unmodifiable>
        <classType>com.xpn.xwiki.objects.classes.TextAreaClass</classType>
      </description>
      <name>
        <disabled>0</disabled>
        <name>name</name>
        <number>3</number>
        <prettyName>Name</prettyName>
        <size>40</size>
        <unmodifiable>0</unmodifiable>
        <classType>com.xpn.xwiki.objects.classes.StringClass</classType>
      </name>
      <type>
        <cache>0</cache>
        <disabled>0</disabled>
        <displayType>select</displayType>
        <multiSelect>0</multiSelect>
        <name>type</name>
        <number>4</number>
        <prettyName>Panel type</prettyName>
        <relationalStorage>0</relationalStorage>
        <separator> </separator>
        <separators>|, </separators>
        <size>1</size>
        <unmodifiable>0</unmodifiable>
        <values>view|edit</values>
        <classType>com.xpn.xwiki.objects.classes.StaticListClass</classType>
      </type>
    </class>
    <property>
      <async_cached>0</async_cached>
    </property>
    <property>
      <async_context>
        <value>locale</value>
      </async_context>
    </property>
    <property>
      <async_enabled>1</async_enabled>
    </property>
    <property>
      <category>Information</category>
    </property>
    <property>
      <content>{{velocity}}
#panelheader($services.localization.render('help.tipsPanel.title'))
#set ($uixs = $services.uix.getExtensions('org.xwiki.platform.help.tipsPanel'))
#if ($uixs.size() > 0)
  #set ($index = $mathtool.random(0, $uixs.size()))
  $uixs.get($index).getParameters().get('tip')
#else
  $services.localization.render('help.tipsPanel.noTipMessage')
#end
#panelfooter()
{{/velocity}}</content>
    </property>
    <property>
      <description>Provides various tips about using XWiki</description>
    </property>
    <property>
      <name>Tips</name>
    </property>
    <property>
      <type>view</type>
    </property>
  </object>
</xwikidoc>

Output:
【漏洞类型】未验证的用户输入执行
【严重性】High
【漏洞摘要】原始代码在`WebHome.xml`中使用了Velocity宏语言来动态获取并渲染内容。具体来说，在获取`$uixs.get($index).getParameters().get('tip')`后，直接将其作为内容执行，而未验证该内容的来源或安全性。这可能导致恶意用户通过注入恶意代码来执行任意命令，从而破坏系统安全。
【关键代码模式】
- `{{velocity}}`：Velocity宏语言的开始标签，用于执行动态内容。
- `#set ($tip = $uixs.get($index).getParameters().get('tip'))`：获取动态内容的行。
- `$uixs.get($index).getParameters().get('tip')`：直接执行未验证内容的行。
【修复方法说明】修复方法通过将获取的内容存储在变量中，并在受限模式下执行，以防止恶意代码的执行。使用了`{{context restricted="true" transformationContext="transformations" source="script:tip"/}}`来限制执行环境，从而提高系统的安全性。


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
src/main/java/org/xerial/snappy/SnappyInputStream.java
### 代码内容：
//--------------------------------------
// XerialJ
//
// SnappyInputStream.java
// Since: 2011/03/31 20:14:56
//
// $URL$
// $Author$
//--------------------------------------
package org.xerial.snappy;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * A stream filter for reading data compressed by {@link SnappyOutputStream}.
 *
 * @author leo
 */
public class SnappyInputStream
        extends InputStream
{
    private boolean finishedReading = false;
    protected final InputStream in;

    private byte[] compressed;
    private byte[] uncompressed;
    private int uncompressedCursor = 0;
    private int uncompressedLimit = 0;

    private byte[] header = new byte[SnappyCodec.headerSize()];

    /**
     * Create a filter for reading compressed data as a uncompressed stream
     *
     * @param input
     * @throws IOException
     */
    public SnappyInputStream(InputStream input)
            throws IOException
    {
        this.in = input;
        readHeader();
    }

    /**
     * Close the stream
     */
    /* (non-Javadoc)
     * @see java.io.InputStream#close()
     */
    @Override
    public void close()
            throws IOException
    {
        compressed = null;
        uncompressed = null;
        if (in != null) {
            in.close();
        }
    }

    protected void readHeader()
            throws IOException
    {
        int readBytes = 0;
        while (readBytes < header.length) {
            int ret = in.read(header, readBytes, header.length - readBytes);
            if (ret == -1) {
                break;
            }
            readBytes += ret;
        }

        // Quick test of the header
        if (readBytes == 0) {
            // Snappy produces at least 1-byte result. So the empty input is not a valid input
            throw new SnappyIOException(SnappyErrorCode.EMPTY_INPUT, "Cannot decompress empty stream");
        }
        if (readBytes < header.length || !SnappyCodec.hasMagicHeaderPrefix(header)) {
            // do the default uncompression
            // (probably) compressed by Snappy.compress(byte[])
            readFully(header, readBytes);
            return;
        }
    }

    private static boolean isValidHeader(byte[] header)
            throws IOException
    {
        SnappyCodec codec = SnappyCodec.readHeader(new ByteArrayInputStream(header));
        if (codec.isValidMagicHeader()) {
            // The input data is compressed by SnappyOutputStream
            if (codec.version < SnappyCodec.MINIMUM_COMPATIBLE_VERSION) {
                throw new SnappyIOException(SnappyErrorCode.INCOMPATIBLE_VERSION, String.format(
                        "Compressed with an incompatible codec version %d. At least version %d is required",
                        codec.version, SnappyCodec.MINIMUM_COMPATIBLE_VERSION));
            }
            return true;
        }
        else {
            return false;
        }
    }

    protected void readFully(byte[] fragment, int fragmentLength)
            throws IOException
    {
        if (fragmentLength == 0) {
            finishedReading = true;
            return;
        }
        // read the entire input data to the buffer
        compressed = new byte[Math.max(8 * 1024, fragmentLength)]; // 8K
        System.arraycopy(fragment, 0, compressed, 0, fragmentLength);
        int cursor = fragmentLength;
        for (int readBytes = 0; (readBytes = in.read(compressed, cursor, compressed.length - cursor)) != -1; ) {
            cursor += readBytes;
            if (cursor >= compressed.length) {
                byte[] newBuf = new byte[(compressed.length * 2)];
                System.arraycopy(compressed, 0, newBuf, 0, compressed.length);
                compressed = newBuf;
            }
        }

        finishedReading = true;

        // Uncompress
        int uncompressedLength = Snappy.uncompressedLength(compressed, 0, cursor);
        uncompressed = new byte[uncompressedLength];
        Snappy.uncompress(compressed, 0, cursor, uncompressed, 0);
        this.uncompressedCursor = 0;
        this.uncompressedLimit = uncompressedLength;
    }

    /**
     * Reads up to len bytes of data from the input stream into an array of
     * bytes.
     */
    /* (non-Javadoc)
     * @see java.io.InputStream#read(byte[], int, int)
     */
    @Override
    public int read(byte[] b, int byteOffset, int byteLength)
            throws IOException
    {
        int writtenBytes = 0;
        for (; writtenBytes < byteLength; ) {

            if (uncompressedCursor >= uncompressedLimit) {
                if (hasNextChunk()) {
                    continue;
                }
                else {
                    return writtenBytes == 0 ? -1 : writtenBytes;
                }
            }
            int bytesToWrite = Math.min(uncompressedLimit - uncompressedCursor, byteLength - writtenBytes);
            System.arraycopy(uncompressed, uncompressedCursor, b, byteOffset + writtenBytes, bytesToWrite);
            writtenBytes += bytesToWrite;
            uncompressedCursor += bytesToWrite;
        }

        return writtenBytes;
    }

    /**
     * Read uncompressed data into the specified array
     *
     * @param array
     * @param byteOffset
     * @param byteLength
     * @return written bytes
     * @throws IOException
     */
    public int rawRead(Object array, int byteOffset, int byteLength)
            throws IOException
    {
        int writtenBytes = 0;
        for (; writtenBytes < byteLength; ) {

            if (uncompressedCursor >= uncompressedLimit) {
                if (hasNextChunk()) {
                    continue;
                }
                else {
                    return writtenBytes == 0 ? -1 : writtenBytes;
                }
            }
            int bytesToWrite = Math.min(uncompressedLimit - uncompressedCursor, byteLength - writtenBytes);
            Snappy.arrayCopy(uncompressed, uncompressedCursor, bytesToWrite, array, byteOffset + writtenBytes);
            writtenBytes += bytesToWrite;
            uncompressedCursor += bytesToWrite;
        }

        return writtenBytes;
    }

    /**
     * Read long array from the stream
     *
     * @param d input
     * @param off offset
     * @param len the number of long elements to read
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(long[] d, int off, int len)
            throws IOException
    {
        return rawRead(d, off * 8, len * 8);
    }

    /**
     * Read long array from the stream
     *
     * @param d
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(long[] d)
            throws IOException
    {
        return read(d, 0, d.length);
    }

    /**
     * Read double array from the stream
     *
     * @param d input
     * @param off offset
     * @param len the number of double elements to read
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(double[] d, int off, int len)
            throws IOException
    {
        return rawRead(d, off * 8, len * 8);
    }

    /**
     * Read double array from the stream
     *
     * @param d
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(double[] d)
            throws IOException
    {
        return read(d, 0, d.length);
    }

    /**
     * Read int array from the stream
     *
     * @param d
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(int[] d)
            throws IOException
    {
        return read(d, 0, d.length);
    }

    /**
     * Read int array from the stream
     *
     * @param d input
     * @param off offset
     * @param len the number of int elements to read
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(int[] d, int off, int len)
            throws IOException
    {
        return rawRead(d, off * 4, len * 4);
    }

    /**
     * Read float array from the stream
     *
     * @param d input
     * @param off offset
     * @param len the number of float elements to read
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(float[] d, int off, int len)
            throws IOException
    {
        return rawRead(d, off * 4, len * 4);
    }

    /**
     * Read float array from the stream
     *
     * @param d
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(float[] d)
            throws IOException
    {
        return read(d, 0, d.length);
    }

    /**
     * Read short array from the stream
     *
     * @param d input
     * @param off offset
     * @param len the number of short elements to read
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(short[] d, int off, int len)
            throws IOException
    {
        return rawRead(d, off * 2, len * 2);
    }

    /**
     * Read short array from the stream
     *
     * @param d
     * @return the total number of bytes read into the buffer, or -1 if there is
     * no more data because the end of the stream has been reached.
     * @throws IOException
     */
    public int read(short[] d)
            throws IOException
    {
        return read(d, 0, d.length);
    }

    /**
     * Read next len bytes
     *
     * @param dest
     * @param offset
     * @param len
     * @return read bytes
     */
    private int readNext(byte[] dest, int offset, int len)
            throws IOException
    {
        int readBytes = 0;
        while (readBytes < len) {
            int ret = in.read(dest, readBytes + offset, len - readBytes);
            if (ret == -1) {
                finishedReading = true;
                return readBytes;
            }
            readBytes += ret;
        }
        return readBytes;
    }

    protected boolean hasNextChunk()
            throws IOException
    {
        if (finishedReading) {
            return false;
        }

        uncompressedCursor = 0;
        uncompressedLimit = 0;

        int readBytes = readNext(header, 0, 4);
        if (readBytes < 4) {
            return false;
        }

        int chunkSize = SnappyOutputStream.readInt(header, 0);
        if (chunkSize == SnappyCodec.MAGIC_HEADER_HEAD) {
            // Concatenated data
            int remainingHeaderSize = SnappyCodec.headerSize() - 4;
            readBytes = readNext(header, 4, remainingHeaderSize);
            if(readBytes < remainingHeaderSize) {
                throw new SnappyIOException(SnappyErrorCode.FAILED_TO_UNCOMPRESS, String.format("Insufficient header size in a concatenated block"));
            }

            if (isValidHeader(header)) {
                return hasNextChunk();
            }
            else {
                return false;
            }
        }

        // extend the compressed data buffer size
        if (compressed == null || chunkSize > compressed.length) {
            compressed = new byte[chunkSize];
        }
        readBytes = 0;
        while (readBytes < chunkSize) {
            int ret = in.read(compressed, readBytes, chunkSize - readBytes);
            if (ret == -1) {
                break;
            }
            readBytes += ret;
        }
        if (readBytes < chunkSize) {
            throw new IOException("failed to read chunk");
        }
        int uncompressedLength = Snappy.uncompressedLength(compressed, 0, chunkSize);
        if (uncompressed == null || uncompressedLength > uncompressed.length) {
            uncompressed = new byte[uncompressedLength];
        }
        int actualUncompressedLength = Snappy.uncompress(compressed, 0, chunkSize, uncompressed, 0);
        if (uncompressedLength != actualUncompressedLength) {
            throw new SnappyIOException(SnappyErrorCode.INVALID_CHUNK_SIZE, String.format("expected %,d bytes, but decompressed chunk has %,d bytes", uncompressedLength, actualUncompressedLength));
        }
        uncompressedLimit = actualUncompressedLength;

        return true;
    }

    /**
     * Reads the next byte of uncompressed data from the input stream. The value
     * byte is returned as an int in the range 0 to 255. If no byte is available
     * because the end of the stream has been reached, the value -1 is returned.
     * This method blocks until input data is available, the end of the stream
     * is detected, or an exception is thrown.
     */
    /* (non-Javadoc)
     * @see java.io.InputStream#read()
     */
    @Override
    public int read()
            throws IOException
    {
        if (uncompressedCursor < uncompressedLimit) {
            return uncompressed[uncompressedCursor++] & 0xFF;
        }
        else {
            if (hasNextChunk()) {
                return read();
            }
            else {
                return -1;
            }
        }
    }

    /* (non-Javadoc)
     * @see java.io.InputStream#available()
     */
    @Override
    public int available()
            throws IOException
    {
        if (uncompressedCursor < uncompressedLimit) {
            return uncompressedLimit - uncompressedCursor;
        }
        else {
            if (hasNextChunk()) {
                return uncompressedLimit - uncompressedCursor;
            }
            else {
                return 0;
            }
        }
    }
}


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
src/main/java/org/xerial/snappy/BitShuffle.java
### 代码内容：
//--------------------------------------
// snappy-java Project
//
// BitShuffle.java
// Since: 2016/03/31
//
// $URL$
// $Author$
//--------------------------------------
package org.xerial.snappy;

import java.io.IOException;
import java.nio.ByteBuffer;

public class BitShuffle
{
    static {
        try {
            impl = SnappyLoader.loadBitShuffleApi();
        }
        catch (Exception e) {
            throw new ExceptionInInitializerError(e);
        }
    }

    /**
     * An instance of BitShuffleNative
     */
    private static BitShuffleNative impl;

    /**
     * Apply a bit-shuffling filter into the content in the given input buffer. After bit-shuffling,
     * you can retrieve the shuffled data from the output buffer [pos() ...limit())
     * (shuffled data size = limit() - pos() = remaining()).
     *
     * @param input buffer[pos() ... limit()) containing the input data
     * @param type element type of the input data
     * @param shuffled output of the shuffled data. Uses range [pos()..].
     * @return byte size of the shuffled data.
     * @throws SnappyError when the input is not a direct buffer
     * @throws IllegalArgumentException when the input length is not a multiple of the given type size
     */
    public static int shuffle(ByteBuffer input, BitShuffleType type, ByteBuffer shuffled) throws IOException {
        if (!input.isDirect()) {
            throw new SnappyError(SnappyErrorCode.NOT_A_DIRECT_BUFFER, "input is not a direct buffer");
        }
        if (!shuffled.isDirect()) {
            throw new SnappyError(SnappyErrorCode.NOT_A_DIRECT_BUFFER, "destination is not a direct buffer");
        }

        // input: input[pos(), limit())
        // output: shuffled
        int uPos = input.position();
        int uLen = input.remaining();
        int typeSize = type.getTypeSize();
        if (uLen % typeSize != 0) {
            throw new IllegalArgumentException("input length must be a multiple of the given type size: " + typeSize);
        }
        if (shuffled.remaining() < uLen) {
            throw new IllegalArgumentException("not enough space for output");
        }
        int numProcessed = impl.shuffleDirectBuffer(input, uPos, typeSize, uLen, shuffled, shuffled.position());
        assert(numProcessed == uLen);

        //         pos   limit
        // [ ......BBBBBBB.........]
        shuffled.limit(shuffled.position() + numProcessed);
        return numProcessed;
    }

    /**
     * Apply a bit-shuffling filter into the input short array.
     *
     * @param input
     * @return bit-shuffled byte array
     * @throws IOException
     */
    public static byte[] shuffle(short[] input) throws IOException {
        byte[] output = new byte[input.length * 2];
        int numProcessed = impl.shuffle(input, 0, 2, input.length * 2, output, 0);
        assert(numProcessed == input.length * 2);
        return output;
    }

    /**
     * Apply a bit-shuffling filter into the input int array.
     *
     * @param input
     * @return bit-shuffled byte array
     * @throws IOException
     */
    public static byte[] shuffle(int[] input) throws IOException {
        byte[] output = new byte[input.length * 4];
        int numProcessed = impl.shuffle(input, 0, 4, input.length * 4, output, 0);
        assert(numProcessed == input.length * 4);
        return output;
    }

    /**
     * Apply a bit-shuffling filter into the input long array.
     *
     * @param input
     * @return bit-shuffled byte array
     * @throws IOException
     */
    public static byte[] shuffle(long[] input) throws IOException {
        byte[] output = new byte[input.length * 8];
        int numProcessed = impl.shuffle(input, 0, 8, input.length * 8, output, 0);
        assert(numProcessed == input.length * 8);
        return output;
    }

    /**
     * Apply a bit-shuffling filter into the input float array.
     *
     * @param input
     * @return bit-shuffled byte array
     * @throws IOException
     */
    public static byte[] shuffle(float[] input) throws IOException {
        byte[] output = new byte[input.length * 4];
        int numProcessed = impl.shuffle(input, 0, 4, input.length * 4, output, 0);
        assert(numProcessed == input.length * 4);
        return output;
    }

    /**
     * Apply a bit-shuffling filter into the input double array.
     *
     * @param input
     * @return bit-shuffled byte array
     * @throws IOException
     */
    public static byte[] shuffle(double[] input) throws IOException {
        byte[] output = new byte[input.length * 8];
        int numProcessed = impl.shuffle(input, 0, 8, input.length * 8, output, 0);
        assert(numProcessed == input.length * 8);
        return output;
    }

    /**
     * Convert the input bit-shuffled byte array into an original array. The result is dumped
     * to the specified output buffer.
     *
     * @param shuffled buffer[pos() ... limit()) containing the input shuffled data
     * @param type element type of the input data
     * @param output output of the the original data. It uses buffer[pos()..]
     * @return byte size of the unshuffled data.
     * @throws IOException when failed to unshuffle the given input
     * @throws SnappyError when the input is not a direct buffer
     * @throws IllegalArgumentException when the length of input shuffled data is not a multiple of the given type size
     */
    public static int unshuffle(ByteBuffer shuffled, BitShuffleType type, ByteBuffer output) throws IOException {
        if (!shuffled.isDirect()) {
            throw new SnappyError(SnappyErrorCode.NOT_A_DIRECT_BUFFER, "input is not a direct buffer");
        }
        if (!output.isDirect()) {
            throw new SnappyError(SnappyErrorCode.NOT_A_DIRECT_BUFFER, "destination is not a direct buffer");
        }

        // input: input[pos(), limit())
        // output: shuffled
        int uPos = shuffled.position();
        int uLen = shuffled.remaining();
        int typeSize = type.getTypeSize();
        if (uLen % typeSize != 0) {
            throw new IllegalArgumentException("length of input shuffled data must be a multiple of the given type size: " + typeSize);
        }
        if (output.remaining() < uLen) {
            throw new IllegalArgumentException("not enough space for output");
        }
        int numProcessed = impl.unshuffleDirectBuffer(shuffled, uPos, typeSize, uLen, output, shuffled.position());
        assert(numProcessed == uLen);

        //         pos   limit
        // [ ......BBBBBBB.........]
        shuffled.limit(shuffled.position() + numProcessed);
        return numProcessed;
    }

    /**
     * Convert the input bit-shuffled byte array into an original short array.
     *
     * @param input
     * @return a short array
     * @throws IOException
     */
    public static short[] unshuffleShortArray(byte[] input) throws IOException {
        short[] output = new short[input.length / 2];
        int numProcessed = impl.unshuffle(input, 0, 2, input.length, output, 0);
        assert(numProcessed == input.length);
        return output;
    }

    /**
     * Convert the input bit-shuffled byte array into an original int array.
     *
     * @param input
     * @return an int array
     * @throws IOException
     */
    public static int[] unshuffleIntArray(byte[] input) throws IOException {
        int[] output = new int[input.length / 4];
        int numProcessed = impl.unshuffle(input, 0, 4, input.length, output, 0);
        assert(numProcessed == input.length);
        return output;
    }

    /**
     * Convert the input bit-shuffled byte array into an original long array.
     *
     * @param input
     * @return a long array
     * @throws IOException
     */
    public static long[] unshuffleLongArray(byte[] input) throws IOException {
        long[] output = new long[input.length / 8];
        int numProcessed = impl.unshuffle(input, 0, 8, input.length, output, 0);
        assert(numProcessed == input.length);
        return output;
    }

    /**
     * Convert the input bit-shuffled byte array into an original float array.
     *
     * @param input
     * @return an float array
     * @throws IOException
     */
    public static float[] unshuffleFloatArray(byte[] input) throws IOException {
        float[] output = new float[input.length / 4];
        int numProcessed = impl.unshuffle(input, 0, 4, input.length, output, 0);
        assert(numProcessed == input.length);
        return output;
    }

    /**
     * Convert the input bit-shuffled byte array into an original double array.
     *
     * @param input
     * @return a double array
     * @throws IOException
     */
    public static double[] unshuffleDoubleArray(byte[] input) throws IOException {
        double[] output = new double[input.length / 8];
        int numProcessed = impl.unshuffle(input, 0, 8, input.length, output, 0);
        assert(numProcessed == input.length);
        return output;
    }
}

## 内容2
### 文件路径：
src/main/java/org/xerial/snappy/SnappyErrorCode.java
### 代码内容：
//--------------------------------------
// XerialJ
//
// SnappyErrorCode.java
// Since: 2011/03/30 14:56:50
//
// $URL$
// $Author$
//--------------------------------------
package org.xerial.snappy;

/**
 * Error codes of snappy-java
 *
 * @author leo
 */
public enum SnappyErrorCode
{

    // DO NOT change these error code IDs because these numbers are used inside SnappyNative.cpp
    UNKNOWN(0),
    FAILED_TO_LOAD_NATIVE_LIBRARY(1),
    PARSING_ERROR(2),
    NOT_A_DIRECT_BUFFER(3),
    OUT_OF_MEMORY(4),
    FAILED_TO_UNCOMPRESS(5),
    EMPTY_INPUT(6),
    INCOMPATIBLE_VERSION(7),
    INVALID_CHUNK_SIZE(8),
    UNSUPPORTED_PLATFORM(9);

    public final int id;

    private SnappyErrorCode(int id)
    {
        this.id = id;
    }

    public static SnappyErrorCode getErrorCode(int id)
    {
        for (SnappyErrorCode code : SnappyErrorCode.values()) {
            if (code.id == id) {
                return code;
            }
        }
        return UNKNOWN;
    }

    public static String getErrorMessage(int id)
    {
        return getErrorCode(id).name();
    }
}

Output:
【漏洞类型】整数溢出
【严重性】High
【漏洞摘要】代码在处理数组时，通过将数组长度乘以元素的字节大小来计算输出字节数组的大小。然而，这种乘法可能导致整数溢出，特别是在数组长度非常大且元素字节大小较大时。当整数溢出发生时，输出数组的大小可能比预期小得多，这会导致在填充输出数组时出现缓冲区溢出。具体表现为在`shuffle`方法中，`byte[] output = new byte[input.length * 2];`、`byte[] output = new byte[input.length * 4];`、`byte[] output = new byte[input.length * 8];`等行，没有检查乘法结果是否小于原始数组长度。
【关键代码模式】数组长度乘以元素字节大小计算输出数组大小、`new byte[input.length * elementSize]`、`SnappyError`、`IllegalArgumentException`。
【修复方法说明】修复方法通过在创建输出字节数组之前检查乘法结果是否小于原始数组长度来防止整数溢出。适用的最佳实践是始终验证可能引起溢出的计算结果。