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：
docs/documentation/release_notes/index.adoc
### 代码内容：
:toc: left
:toclevels: 3
:sectanchors:
:linkattrs:

include::topics/templates/document-attributes.adoc[]

:release_notes:

= {releasenotes_name}

:release_header_guide: {releasenotes_name_short}
:release_header_latest_link: {releasenotes_link_latest}
include::topics/templates/release-header.adoc[]

== {project_name_full} 21.1.0
include::topics/21_1_0.adoc[leveloffset=2]

== {project_name_full} 21.0.0
include::topics/21_0_0.adoc[leveloffset=2]

== {project_name_full} 20.0.0
include::topics/20_0_0.adoc[leveloffset=2]

== {project_name_full} 19.0.0
include::topics/19_0_0.adoc[leveloffset=2]

== {project_name_full} 18.0.0
include::topics/18_0_0.adoc[leveloffset=2]

== {project_name_full} 17.0.0
include::topics/17_0_0.adoc[leveloffset=2]

== {project_name_full} 16.1.0
include::topics/16_1_0.adoc[leveloffset=2]

== {project_name_full} 16.0.0
include::topics/16_0_0.adoc[leveloffset=2]

== {project_name_full} 15.1.0
include::topics/15_1_0.adoc[leveloffset=2]

== {project_name_full} 15.0.1
include::topics/15_0_1.adoc[leveloffset=2]

== {project_name_full} 15.0.0
include::topics/15_0_0.adoc[leveloffset=2]

== {project_name_full} 14.0.0
include::topics/14_0_0.adoc[leveloffset=2]

== {project_name_full} 13.0.0
include::topics/13_0_0.adoc[leveloffset=2]

== {project_name_full} 12.0.0
include::topics/12_0_0.adoc[leveloffset=2]

== {project_name_full} 11.0.0
include::topics/11_0_0.adoc[leveloffset=2]

== {project_name_full} 10.0.0
include::topics/10_0_0.adoc[leveloffset=2]

== {project_name_full} 9.0.1
include::topics/9_0_1.adoc[leveloffset=2]

== {project_name_full} 9.0.0
include::topics/9_0_0.adoc[leveloffset=2]

== {project_name_full} 8.0.2
include::topics/8_0_2.adoc[leveloffset=2]

== {project_name_full} 8.0.1
include::topics/8_0_1.adoc[leveloffset=2]

== {project_name_full} 8.0.0
include::topics/8_0_0.adoc[leveloffset=2]

== {project_name_full} 7.0.1
include::topics/7_0_1.adoc[leveloffset=2]

== {project_name_full} 7.0.0
include::topics/7_0_0.adoc[leveloffset=2]

== {project_name_full} 6.0.0
include::topics/6_0_0.adoc[leveloffset=2]

== {project_name_full} 5.0.0
include::topics/5_0_0.adoc[leveloffset=2]

== {project_name_full} 4.8.0.Final
include::topics/4_8_0_final.adoc[leveloffset=2]

== {project_name_full} 4.7.0.Final
include::topics/4_7_0_final.adoc[leveloffset=2]

== {project_name_full} 4.6.0.Final
include::topics/4_6_0_final.adoc[leveloffset=2]

== {project_name_full} 4.5.0.Final
include::topics/4_5_0_final.adoc[leveloffset=2]

== {project_name_full} 4.4.0.Final
include::topics/4_4_0_final.adoc[leveloffset=2]

== {project_name_full} 4.3.0.Final
include::topics/4_3_0_final.adoc[leveloffset=2]

== {project_name_full} 4.2.0.Final
include::topics/4_2_0_final.adoc[leveloffset=2]

== {project_name_full} 4.1.0.Final
include::topics/4_1_0_final.adoc[leveloffset=2]

== {project_name_full} 4.0.0.Final
include::topics/4_0_0_final.adoc[leveloffset=2]
include::topics/4_0_0_beta3.adoc[leveloffset=2]

## 内容2
### 文件路径：
docs/documentation/server_admin/topics/threat/open-redirect.adoc
### 代码内容：
=== Open redirectors

An open redirector is an endpoint using a parameter to automatically redirect a user agent to the location specified by the parameter value without validation. An attacker can use the end-user authorization endpoint and the redirect URI parameter to use the authorization server as an open redirector, using a user's trust in an authorization server to launch a phishing attack.

{project_name} requires that all registered applications and clients register at least one redirection URI pattern. When a client requests that {project_name} performs a redirect, {project_name} checks the redirect URI against the list of valid registered URI patterns. Clients and applications must register as specific a URI pattern as possible to mitigate open redirector attacks.

## 内容3
### 文件路径：
services/src/main/java/org/keycloak/protocol/oidc/utils/RedirectUtils.java
### 代码内容：
package org.keycloak.protocol.oidc.utils;

import org.jboss.logging.Logger;
import org.keycloak.common.util.Encode;
import org.keycloak.common.util.KeycloakUriBuilder;
import org.keycloak.common.util.UriUtils;
import org.keycloak.models.ClientModel;
import org.keycloak.models.Constants;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.KeycloakUriInfo;
import org.keycloak.models.RealmModel;
import org.keycloak.protocol.oidc.OIDCLoginProtocol;
import org.keycloak.services.Urls;
import org.keycloak.services.util.ResolveRelative;

import java.net.URI;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * @author Stian Thorgersen
 */
public class RedirectUtils {

    private static final Logger logger = Logger.getLogger(RedirectUtils.class);

    /**
     * This method is deprecated for performance and security reasons and it is available just for the
     * backwards compatibility. It is recommended to use some other methods of this class where the client is given as an argument
     * to the method, so we know the client, which redirect-uri we are trying to resolve.
     */
    @Deprecated
    public static String verifyRealmRedirectUri(KeycloakSession session, String redirectUri) {
        Set<String> validRedirects = getValidateRedirectUris(session);
        return verifyRedirectUri(session, null, redirectUri, validRedirects, true);
    }

    public static String verifyRedirectUri(KeycloakSession session, String redirectUri, ClientModel client) {
        return verifyRedirectUri(session, redirectUri, client, true);
    }

    public static String verifyRedirectUri(KeycloakSession session, String redirectUri, ClientModel client, boolean requireRedirectUri) {
        if (client != null)
            return verifyRedirectUri(session, client.getRootUrl(), redirectUri, client.getRedirectUris(), requireRedirectUri);
        return null;
    }

    public static Set<String> resolveValidRedirects(KeycloakSession session, String rootUrl, Set<String> validRedirects) {
        // If the valid redirect URI is relative (no scheme, host, port) then use the request's scheme, host, and port
        Set<String> resolveValidRedirects = new HashSet<>();
        for (String validRedirect : validRedirects) {
            if (validRedirect.startsWith("/")) {
                validRedirect = relativeToAbsoluteURI(session, rootUrl, validRedirect);
                logger.debugv("replacing relative valid redirect with: {0}", validRedirect);
                resolveValidRedirects.add(validRedirect);
            } else {
                resolveValidRedirects.add(validRedirect);
            }
        }
        return resolveValidRedirects;
    }

    @Deprecated
    private static Set<String> getValidateRedirectUris(KeycloakSession session) {
        RealmModel realm = session.getContext().getRealm();
        return session.clients().getAllRedirectUrisOfEnabledClients(realm).entrySet().stream()
          .filter(me -> me.getKey().isEnabled() && OIDCLoginProtocol.LOGIN_PROTOCOL.equals(me.getKey().getProtocol()) && !me.getKey().isBearerOnly() && (me.getKey().isStandardFlowEnabled() || me.getKey().isImplicitFlowEnabled()))
          .map(me -> resolveValidRedirects(session, me.getKey().getRootUrl(), me.getValue()))
          .flatMap(Collection::stream)
          .collect(Collectors.toSet());
    }

    public static String verifyRedirectUri(KeycloakSession session, String rootUrl, String redirectUri, Set<String> validRedirects, boolean requireRedirectUri) {
        KeycloakUriInfo uriInfo = session.getContext().getUri();
        RealmModel realm = session.getContext().getRealm();

        if (redirectUri == null) {
            if (!requireRedirectUri) {
                redirectUri = getSingleValidRedirectUri(validRedirects);
            }

            if (redirectUri == null) {
                logger.debug("No Redirect URI parameter specified");
                return null;
            }
        } else if (validRedirects.isEmpty()) {
            logger.debug("No Redirect URIs supplied");
            redirectUri = null;
        } else {
            // Make the validations against fully decoded and normalized redirect-url. This also allows wildcards (case when client configured "Valid redirect-urls" contain wildcards)
            String decodedRedirectUri = decodeRedirectUri(redirectUri);
            decodedRedirectUri = getNormalizedRedirectUri(decodedRedirectUri);
            if (decodedRedirectUri == null) return null;

            String r = decodedRedirectUri;
            Set<String> resolveValidRedirects = resolveValidRedirects(session, rootUrl, validRedirects);

            boolean valid = matchesRedirects(resolveValidRedirects, r, true);

            if (!valid && (r.startsWith(Constants.INSTALLED_APP_URL) || r.startsWith(Constants.INSTALLED_APP_LOOPBACK)) && r.indexOf(':', Constants.INSTALLED_APP_URL.length()) >= 0) {
                int i = r.indexOf(':', Constants.INSTALLED_APP_URL.length());

                StringBuilder sb = new StringBuilder();
                sb.append(r.substring(0, i));

                i = r.indexOf('/', i);
                if (i >= 0) {
                    sb.append(r.substring(i));
                }

                r = sb.toString();

                valid = matchesRedirects(resolveValidRedirects, r, true);
            }

            // Return the original redirectUri, which can be partially encoded - for example http://localhost:8280/foo/bar%20bar%2092%2F72/3 . Just make sure it is normalized
            redirectUri = getNormalizedRedirectUri(redirectUri);

            // We try to check validity also for original (encoded) redirectUrl, but just in case it exactly matches some "Valid Redirect URL" specified for client (not wildcards allowed)
            if (!valid) {
                valid = matchesRedirects(resolveValidRedirects, redirectUri, false);
            }

            if (valid && redirectUri.startsWith("/")) {
                redirectUri = relativeToAbsoluteURI(session, rootUrl, redirectUri);
            }
            redirectUri = valid ? redirectUri : null;
        }

        if (Constants.INSTALLED_APP_URN.equals(redirectUri)) {
            return Urls.realmInstalledAppUrnCallback(uriInfo.getBaseUri(), realm.getName()).toString();
        } else {
            return redirectUri;
        }
    }

    private static String getNormalizedRedirectUri(String redirectUri) {
        if (redirectUri != null) {
            try {
                URI uri = URI.create(redirectUri);
                redirectUri = uri.normalize().toString();
            } catch (IllegalArgumentException cause) {
                logger.debug("Invalid redirect uri", cause);
                return null;
            } catch (Exception cause) {
                logger.debug("Unexpected error when parsing redirect uri", cause);
                return null;
            }
            redirectUri = lowerCaseHostname(redirectUri);
        }
        return redirectUri;
    }

    // Decode redirectUri. We don't decode query and fragment as those can be encoded in the original URL.
    // URL can be decoded multiple times (in case it was encoded multiple times, or some of it's parts were encoded multiple times)
    private static String decodeRedirectUri(String redirectUri) {
        if (redirectUri == null) return null;
        int MAX_DECODING_COUNT = 5; // Max count of attempts for decoding URL (in case it was encoded multiple times)

        try {
            KeycloakUriBuilder uriBuilder = KeycloakUriBuilder.fromUri(redirectUri).preserveDefaultPort();
            String origQuery = uriBuilder.getQuery();
            String origFragment = uriBuilder.getFragment();
            String encodedRedirectUri = uriBuilder
                    .replaceQuery(null)
                    .fragment(null)
                    .buildAsString();
            String decodedRedirectUri = null;

            for (int i = 0; i < MAX_DECODING_COUNT; i++) {
                decodedRedirectUri = Encode.decode(encodedRedirectUri);
                if (decodedRedirectUri.equals(encodedRedirectUri)) {
                    // URL is decoded. We can return it (after attach original query and fragment)
                    return KeycloakUriBuilder.fromUri(decodedRedirectUri).preserveDefaultPort()
                            .replaceQuery(origQuery)
                            .fragment(origFragment)
                            .buildAsString();
                } else {
                    // Next attempt
                    encodedRedirectUri = decodedRedirectUri;
                }
            }
        } catch (IllegalArgumentException iae) {
            logger.debugf("Illegal redirect URI used: %s, Details: %s", redirectUri, iae.getMessage());
        }
        logger.debugf("Was not able to decode redirect URI: %s", redirectUri);
        return null;
    }

    private static String lowerCaseHostname(String redirectUri) {
        int n = redirectUri.indexOf('/', 7);
        if (n == -1) {
            return redirectUri.toLowerCase();
        } else {
            return redirectUri.substring(0, n).toLowerCase() + redirectUri.substring(n);
        }
    }

    private static String relativeToAbsoluteURI(KeycloakSession session, String rootUrl, String relative) {
        if (rootUrl != null) {
            rootUrl = ResolveRelative.resolveRootUrl(session, rootUrl);
        }

        if (rootUrl == null || rootUrl.isEmpty()) {
            rootUrl = UriUtils.getOrigin(session.getContext().getUri().getBaseUri());
        }
        StringBuilder sb = new StringBuilder();
        sb.append(rootUrl);
        sb.append(relative);
        return sb.toString();
    }

    private static boolean matchesRedirects(Set<String> validRedirects, String redirect, boolean allowWildcards) {
        logger.tracef("matchesRedirects: redirect URL to check: %s, allow wildcards: %b, Configured valid redirect URLs: %s", redirect, allowWildcards, validRedirects);
        for (String validRedirect : validRedirects) {
            if (validRedirect.endsWith("*") && !validRedirect.contains("?") && allowWildcards) {
                // strip off the query component - we don't check them when wildcards are effective
                String r = redirect.contains("?") ? redirect.substring(0, redirect.indexOf("?")) : redirect;
                // strip off *
                int length = validRedirect.length() - 1;
                validRedirect = validRedirect.substring(0, length);
                if (r.startsWith(validRedirect)) return true;
                // strip off trailing '/'
                if (length - 1 > 0 && validRedirect.charAt(length - 1) == '/') length--;
                validRedirect = validRedirect.substring(0, length);
                if (validRedirect.equals(r)) return true;
            } else if (validRedirect.equals(redirect)) return true;
        }
        return false;
    }

    private static String getSingleValidRedirectUri(Collection<String> validRedirects) {
        if (validRedirects.size() != 1) return null;
        String validRedirect = validRedirects.iterator().next();
        return validateRedirectUriWildcard(validRedirect);
    }

    public static String validateRedirectUriWildcard(String redirectUri) {
        if (redirectUri == null)
            return null;

        int idx = redirectUri.indexOf("/*");
        if (idx > -1) {
            redirectUri = redirectUri.substring(0, idx);
        }
        return redirectUri;
    }

    private static String getFirstValidRedirectUri(Collection<String> validRedirects) {
        final String redirectUri = validRedirects.stream().findFirst().orElse(null);
        return (redirectUri != null) ? validateRedirectUriWildcard(redirectUri) : null;
    }

    public static String getFirstValidRedirectUri(KeycloakSession session, String rootUrl, Set<String> validRedirects) {
        return getFirstValidRedirectUri(resolveValidRedirects(session, rootUrl, validRedirects));
    }
}

Output:
【漏洞类型】开放重定向漏洞
【严重性】High
【漏洞摘要】开放重定向漏洞是指一个端点使用参数自动将用户代理重定向到由参数值指定的位置，而没有进行验证。攻击者可以通过利用授权服务器的端点和重定向URI参数，将授权服务器作为开放重定向器，利用用户的信任进行钓鱼攻击。在原始代码中，`RedirectUtils.java`中的`verifyRedirectUri`方法虽然对重定向URI进行了验证，但是并没有对URI的scheme进行检查，这可能导致攻击者利用自定义的scheme进行重定向攻击。
【关键代码模式】`verifyRedirectUri`方法、`matchesRedirects`方法、`getNormalizedRedirectUri`方法、`relativeToAbsoluteURI`方法、`lowerCaseHostname`方法、`decodeRedirectUri`方法
【修复方法说明】修复方法通过在`verifyRedirectUri`方法中增加对URI的scheme的检查，确保只有http或https的scheme会被重定向，从而解决了开放重定向漏洞。


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：
prov/src/main/java/org/bouncycastle/jce/provider/X509LDAPCertStoreSpi.java
### 代码内容：
package org.bouncycastle.jce.provider;

import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.x509.CertificatePair;
import org.bouncycastle.jce.X509LDAPCertStoreParameters;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.*;
import javax.security.auth.x500.X500Principal;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.security.InvalidAlgorithmParameterException;
import java.security.cert.*;
import java.util.*;

/**
 *
 * This is a general purpose implementation to get X.509 certificates and CRLs
 * from a LDAP location.
 * <p>
 * At first a search is performed in the ldap*AttributeNames of the
 * {@link org.bouncycastle.jce.X509LDAPCertStoreParameters} with the given
 * information of the subject (for all kind of certificates) or issuer (for
 * CRLs), respectively, if a X509CertSelector is given with that details. For
 * CRLs, CA certificates and cross certificates a coarse search is made only for
 * entries with that content to get more possibly matching results.
 */
public class X509LDAPCertStoreSpi
    extends CertStoreSpi
{
    private X509LDAPCertStoreParameters params;

    public X509LDAPCertStoreSpi(CertStoreParameters params)
        throws InvalidAlgorithmParameterException
    {
        super(params);

        if (!(params instanceof X509LDAPCertStoreParameters))
        {
            throw new InvalidAlgorithmParameterException(
                X509LDAPCertStoreSpi.class.getName() + ": parameter must be a " + X509LDAPCertStoreParameters.class.getName() + " object\n"
                    + params.toString());
        }

        this.params = (X509LDAPCertStoreParameters)params;
    }

    /**
     * Initial Context Factory.
     */
    private static String LDAP_PROVIDER = "com.sun.jndi.ldap.LdapCtxFactory";

    /**
     * Processing referrals..
     */
    private static String REFERRALS_IGNORE = "ignore";

    /**
     * Security level to be used for LDAP connections.
     */
    private static final String SEARCH_SECURITY_LEVEL = "none";

    /**
     * Package Prefix for loading URL context factories.
     */
    private static final String URL_CONTEXT_PREFIX = "com.sun.jndi.url";

    private DirContext connectLDAP() throws NamingException
    {
        Properties props = new Properties();
        props.setProperty(Context.INITIAL_CONTEXT_FACTORY, LDAP_PROVIDER);
        props.setProperty(Context.BATCHSIZE, "0");

        props.setProperty(Context.PROVIDER_URL, params.getLdapURL());
        props.setProperty(Context.URL_PKG_PREFIXES, URL_CONTEXT_PREFIX);
        props.setProperty(Context.REFERRAL, REFERRALS_IGNORE);
        props.setProperty(Context.SECURITY_AUTHENTICATION,
            SEARCH_SECURITY_LEVEL);

        DirContext ctx = new InitialDirContext(props);
        return ctx;
    }

    private String parseDN(String subject, String subjectAttributeName)
    {
        String temp = subject;
        int begin = temp.toLowerCase().indexOf(
            subjectAttributeName.toLowerCase());
        temp = temp.substring(begin + subjectAttributeName.length());
        int end = temp.indexOf(',');
        if (end == -1)
        {
            end = temp.length();
        }
        while (temp.charAt(end - 1) == '\\')
        {
            end = temp.indexOf(',', end + 1);
            if (end == -1)
            {
                end = temp.length();
            }
        }
        temp = temp.substring(0, end);
        begin = temp.indexOf('=');
        temp = temp.substring(begin + 1);
        if (temp.charAt(0) == ' ')
        {
            temp = temp.substring(1);
        }
        if (temp.startsWith("\""))
        {
            temp = temp.substring(1);
        }
        if (temp.endsWith("\""))
        {
            temp = temp.substring(0, temp.length() - 1);
        }
        return temp;
    }

    public Collection engineGetCertificates(CertSelector selector)
        throws CertStoreException
    {
        if (!(selector instanceof X509CertSelector))
        {
            throw new CertStoreException("selector is not a X509CertSelector");
        }
        X509CertSelector xselector = (X509CertSelector)selector;

        Set certSet = new HashSet();

        Set set = getEndCertificates(xselector);
        set.addAll(getCACertificates(xselector));
        set.addAll(getCrossCertificates(xselector));

        Iterator it = set.iterator();

        try
        {
            CertificateFactory cf = CertificateFactory.getInstance("X.509",
                BouncyCastleProvider.PROVIDER_NAME);
            while (it.hasNext())
            {
                byte[] bytes = (byte[])it.next();
                if (bytes == null || bytes.length == 0)
                {
                    continue;
                }

                List bytesList = new ArrayList();
                bytesList.add(bytes);

                try
                {
                    CertificatePair pair = CertificatePair
                        .getInstance(new ASN1InputStream(bytes)
                            .readObject());
                    bytesList.clear();
                    if (pair.getForward() != null)
                    {
                        bytesList.add(pair.getForward().getEncoded());
                    }
                    if (pair.getReverse() != null)
                    {
                        bytesList.add(pair.getReverse().getEncoded());
                    }
                }
                catch (IOException e)
                {

                }
                catch (IllegalArgumentException e)
                {

                }
                for (Iterator it2 = bytesList.iterator(); it2.hasNext();)
                {
                    ByteArrayInputStream bIn = new ByteArrayInputStream(
                        (byte[])it2.next());
                    try
                    {
                        Certificate cert = cf.generateCertificate(bIn);
                        // System.out.println(((X509Certificate)
                        // cert).getSubjectX500Principal());
                        if (xselector.match(cert))
                        {
                            certSet.add(cert);
                        }
                    }
                    catch (Exception e)
                    {

                    }
                }
            }
        }
        catch (Exception e)
        {
            throw new CertStoreException(
                "certificate cannot be constructed from LDAP result: " + e);
        }

        return certSet;
    }

    private Set certSubjectSerialSearch(X509CertSelector xselector,
                                        String[] attrs, String attrName, String subjectAttributeName)
        throws CertStoreException
    {
        Set set = new HashSet();
        try
        {
            if (xselector.getSubjectAsBytes() != null
                || xselector.getSubjectAsString() != null
                || xselector.getCertificate() != null)
            {
                String subject = null;
                String serial = null;
                if (xselector.getCertificate() != null)
                {
                    subject = xselector.getCertificate()
                        .getSubjectX500Principal().getName("RFC1779");
                    serial = xselector.getCertificate().getSerialNumber()
                        .toString();
                }
                else
                {
                    if (xselector.getSubjectAsBytes() != null)
                    {
                        subject = new X500Principal(xselector
                            .getSubjectAsBytes()).getName("RFC1779");
                    }
                    else
                    {
                        subject = xselector.getSubjectAsString();
                    }
                }
                String attrValue = parseDN(subject, subjectAttributeName);
                set.addAll(search(attrName, "*" + attrValue + "*", attrs));
                if (serial != null
                    && params.getSearchForSerialNumberIn() != null)
                {
                    attrValue = serial;
                    attrName = params.getSearchForSerialNumberIn();
                    set.addAll(search(attrName, "*" + attrValue + "*", attrs));
                }
            }
            else
            {
                set.addAll(search(attrName, "*", attrs));
            }
        }
        catch (IOException e)
        {
            throw new CertStoreException("exception processing selector: " + e);
        }

        return set;
    }

    private Set getEndCertificates(X509CertSelector xselector)
        throws CertStoreException
    {
        String[] attrs = {params.getUserCertificateAttribute()};
        String attrName = params.getLdapUserCertificateAttributeName();
        String subjectAttributeName = params.getUserCertificateSubjectAttributeName();

        Set set = certSubjectSerialSearch(xselector, attrs, attrName,
            subjectAttributeName);
        return set;
    }

    private Set getCACertificates(X509CertSelector xselector)
        throws CertStoreException
    {
        String[] attrs = {params.getCACertificateAttribute()};
        String attrName = params.getLdapCACertificateAttributeName();
        String subjectAttributeName = params
            .getCACertificateSubjectAttributeName();
        Set set = certSubjectSerialSearch(xselector, attrs, attrName,
            subjectAttributeName);

        if (set.isEmpty())
        {
            set.addAll(search(null, "*", attrs));
        }

        return set;
    }

    private Set getCrossCertificates(X509CertSelector xselector)
        throws CertStoreException
    {
        String[] attrs = {params.getCrossCertificateAttribute()};
        String attrName = params.getLdapCrossCertificateAttributeName();
        String subjectAttributeName = params
            .getCrossCertificateSubjectAttributeName();
        Set set = certSubjectSerialSearch(xselector, attrs, attrName,
            subjectAttributeName);

        if (set.isEmpty())
        {
            set.addAll(search(null, "*", attrs));
        }

        return set;
    }

    public Collection engineGetCRLs(CRLSelector selector)
        throws CertStoreException
    {
        String[] attrs = {params.getCertificateRevocationListAttribute()};
        if (!(selector instanceof X509CRLSelector))
        {
            throw new CertStoreException("selector is not a X509CRLSelector");
        }
        X509CRLSelector xselector = (X509CRLSelector)selector;

        Set crlSet = new HashSet();

        String attrName = params.getLdapCertificateRevocationListAttributeName();
        Set set = new HashSet();

        if (xselector.getIssuerNames() != null)
        {
            for (Iterator it = xselector.getIssuerNames().iterator(); it
                .hasNext();)
            {
                Object o = it.next();
                String attrValue = null;
                if (o instanceof String)
                {
                    String issuerAttributeName = params
                        .getCertificateRevocationListIssuerAttributeName();
                    attrValue = parseDN((String)o, issuerAttributeName);
                }
                else
                {
                    String issuerAttributeName = params
                        .getCertificateRevocationListIssuerAttributeName();
                    attrValue = parseDN(new X500Principal((byte[])o)
                        .getName("RFC1779"), issuerAttributeName);
                }
                set.addAll(search(attrName, "*" + attrValue + "*", attrs));
            }
        }
        else
        {
            set.addAll(search(attrName, "*", attrs));
        }
        set.addAll(search(null, "*", attrs));
        Iterator it = set.iterator();

        try
        {
            CertificateFactory cf = CertificateFactory.getInstance("X.509",
                BouncyCastleProvider.PROVIDER_NAME);
            while (it.hasNext())
            {
                CRL crl = cf.generateCRL(new ByteArrayInputStream((byte[])it
                    .next()));
                if (xselector.match(crl))
                {
                    crlSet.add(crl);
                }
            }
        }
        catch (Exception e)
        {
            throw new CertStoreException(
                "CRL cannot be constructed from LDAP result " + e);
        }

        return crlSet;
    }

    /**
     * Returns a Set of byte arrays with the certificate or CRL encodings.
     *
     * @param attributeName  The attribute name to look for in the LDAP.
     * @param attributeValue The value the attribute name must have.
     * @param attrs          The attributes in the LDAP which hold the certificate,
     *                       certificate pair or CRL in a found entry.
     * @return Set of byte arrays with the certificate encodings.
     */
    private Set search(String attributeName, String attributeValue,
                       String[] attrs) throws CertStoreException
    {
        String filter = attributeName + "=" + attributeValue;
        if (attributeName == null)
        {
            filter = null;
        }
        DirContext ctx = null;
        Set set = new HashSet();
        try
        {

            ctx = connectLDAP();

            SearchControls constraints = new SearchControls();
            constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
            constraints.setCountLimit(0);
            for (int i = 0; i < attrs.length; i++)
            {
                String temp[] = new String[1];
                temp[0] = attrs[i];
                constraints.setReturningAttributes(temp);

                String filter2 = "(&(" + filter + ")(" + temp[0] + "=*))";
                if (filter == null)
                {
                    filter2 = "(" + temp[0] + "=*)";
                }
                NamingEnumeration results = ctx.search(params.getBaseDN(),
                    filter2, constraints);
                while (results.hasMoreElements())
                {
                    SearchResult sr = (SearchResult)results.next();
                    // should only be one attribute in the attribute set with
                    // one
                    // attribute value as byte array
                    NamingEnumeration enumeration = ((Attribute)(sr
                        .getAttributes().getAll().next())).getAll();
                    while (enumeration.hasMore())
                    {
                        Object o = enumeration.next();
                        set.add(o);
                    }
                }
            }
        }
        catch (Exception e)
        {
            throw new CertStoreException(
                "Error getting results from LDAP directory " + e);

        }
        finally
        {
            try
            {
                if (null != ctx)
                {
                    ctx.close();
                }
            }
            catch (Exception e)
            {
            }
        }
        return set;
    }

}

Output:
【漏洞类型】LDAP注入漏洞
【严重性】High
【漏洞摘要】原始代码在构造LDAP搜索过滤器时，直接将用户输入的`attributeValue`拼接到过滤器字符串中。这可能导致攻击者通过构造特殊的`attributeValue`来注入恶意的LDAP搜索指令，进而执行未授权的查询或操作。具体来说，`attributeValue`在`search`方法中被直接使用，而没有进行任何的转义处理。
【关键代码模式】`String filter = attributeName + "=" + attributeValue;`
`parseDN`方法
`search`方法
【修复方法说明】修复方法通过添加`filterEncode`方法对`attributeValue`进行转义处理，确保在LDAP搜索过滤器中使用时，不会被恶意注入。


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：
prov/src/main/java/org/bouncycastle/jce/provider/X509LDAPCertStoreSpi.java
### 代码内容：
package org.bouncycastle.jce.provider;

import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.x509.CertificatePair;
import org.bouncycastle.jce.X509LDAPCertStoreParameters;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.*;
import javax.security.auth.x500.X500Principal;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.security.InvalidAlgorithmParameterException;
import java.security.cert.*;
import java.util.*;

/**
 *
 * This is a general purpose implementation to get X.509 certificates and CRLs
 * from a LDAP location.
 * <p>
 * At first a search is performed in the ldap*AttributeNames of the
 * {@link org.bouncycastle.jce.X509LDAPCertStoreParameters} with the given
 * information of the subject (for all kind of certificates) or issuer (for
 * CRLs), respectively, if a X509CertSelector is given with that details. For
 * CRLs, CA certificates and cross certificates a coarse search is made only for
 * entries with that content to get more possibly matching results.
 */
public class X509LDAPCertStoreSpi
    extends CertStoreSpi
{
    private X509LDAPCertStoreParameters params;

    public X509LDAPCertStoreSpi(CertStoreParameters params)
        throws InvalidAlgorithmParameterException
    {
        super(params);

        if (!(params instanceof X509LDAPCertStoreParameters))
        {
            throw new InvalidAlgorithmParameterException(
                X509LDAPCertStoreSpi.class.getName() + ": parameter must be a " + X509LDAPCertStoreParameters.class.getName() + " object\n"
                    + params.toString());
        }

        this.params = (X509LDAPCertStoreParameters)params;
    }

    /**
     * Initial Context Factory.
     */
    private static String LDAP_PROVIDER = "com.sun.jndi.ldap.LdapCtxFactory";

    /**
     * Processing referrals..
     */
    private static String REFERRALS_IGNORE = "ignore";

    /**
     * Security level to be used for LDAP connections.
     */
    private static final String SEARCH_SECURITY_LEVEL = "none";

    /**
     * Package Prefix for loading URL context factories.
     */
    private static final String URL_CONTEXT_PREFIX = "com.sun.jndi.url";

    private DirContext connectLDAP() throws NamingException
    {
        Properties props = new Properties();
        props.setProperty(Context.INITIAL_CONTEXT_FACTORY, LDAP_PROVIDER);
        props.setProperty(Context.BATCHSIZE, "0");

        props.setProperty(Context.PROVIDER_URL, params.getLdapURL());
        props.setProperty(Context.URL_PKG_PREFIXES, URL_CONTEXT_PREFIX);
        props.setProperty(Context.REFERRAL, REFERRALS_IGNORE);
        props.setProperty(Context.SECURITY_AUTHENTICATION,
            SEARCH_SECURITY_LEVEL);

        DirContext ctx = new InitialDirContext(props);
        return ctx;
    }

    private String parseDN(String subject, String subjectAttributeName)
    {
        String temp = subject;
        int begin = temp.toLowerCase().indexOf(
            subjectAttributeName.toLowerCase());
        temp = temp.substring(begin + subjectAttributeName.length());
        int end = temp.indexOf(',');
        if (end == -1)
        {
            end = temp.length();
        }
        while (temp.charAt(end - 1) == '\\')
        {
            end = temp.indexOf(',', end + 1);
            if (end == -1)
            {
                end = temp.length();
            }
        }
        temp = temp.substring(0, end);
        begin = temp.indexOf('=');
        temp = temp.substring(begin + 1);
        if (temp.charAt(0) == ' ')
        {
            temp = temp.substring(1);
        }
        if (temp.startsWith("\""))
        {
            temp = temp.substring(1);
        }
        if (temp.endsWith("\""))
        {
            temp = temp.substring(0, temp.length() - 1);
        }
        return temp;
    }

    public Collection engineGetCertificates(CertSelector selector)
        throws CertStoreException
    {
        if (!(selector instanceof X509CertSelector))
        {
            throw new CertStoreException("selector is not a X509CertSelector");
        }
        X509CertSelector xselector = (X509CertSelector)selector;

        Set certSet = new HashSet();

        Set set = getEndCertificates(xselector);
        set.addAll(getCACertificates(xselector));
        set.addAll(getCrossCertificates(xselector));

        Iterator it = set.iterator();

        try
        {
            CertificateFactory cf = CertificateFactory.getInstance("X.509",
                BouncyCastleProvider.PROVIDER_NAME);
            while (it.hasNext())
            {
                byte[] bytes = (byte[])it.next();
                if (bytes == null || bytes.length == 0)
                {
                    continue;
                }

                List bytesList = new ArrayList();
                bytesList.add(bytes);

                try
                {
                    CertificatePair pair = CertificatePair
                        .getInstance(new ASN1InputStream(bytes)
                            .readObject());
                    bytesList.clear();
                    if (pair.getForward() != null)
                    {
                        bytesList.add(pair.getForward().getEncoded());
                    }
                    if (pair.getReverse() != null)
                    {
                        bytesList.add(pair.getReverse().getEncoded());
                    }
                }
                catch (IOException e)
                {

                }
                catch (IllegalArgumentException e)
                {

                }
                for (Iterator it2 = bytesList.iterator(); it2.hasNext();)
                {
                    ByteArrayInputStream bIn = new ByteArrayInputStream(
                        (byte[])it2.next());
                    try
                    {
                        Certificate cert = cf.generateCertificate(bIn);
                        // System.out.println(((X509Certificate)
                        // cert).getSubjectX500Principal());
                        if (xselector.match(cert))
                        {
                            certSet.add(cert);
                        }
                    }
                    catch (Exception e)
                    {

                    }
                }
            }
        }
        catch (Exception e)
        {
            throw new CertStoreException(
                "certificate cannot be constructed from LDAP result: " + e);
        }

        return certSet;
    }

    private Set certSubjectSerialSearch(X509CertSelector xselector,
                                        String[] attrs, String attrName, String subjectAttributeName)
        throws CertStoreException
    {
        Set set = new HashSet();
        try
        {
            if (xselector.getSubjectAsBytes() != null
                || xselector.getSubjectAsString() != null
                || xselector.getCertificate() != null)
            {
                String subject = null;
                String serial = null;
                if (xselector.getCertificate() != null)
                {
                    subject = xselector.getCertificate()
                        .getSubjectX500Principal().getName("RFC1779");
                    serial = xselector.getCertificate().getSerialNumber()
                        .toString();
                }
                else
                {
                    if (xselector.getSubjectAsBytes() != null)
                    {
                        subject = new X500Principal(xselector
                            .getSubjectAsBytes()).getName("RFC1779");
                    }
                    else
                    {
                        subject = xselector.getSubjectAsString();
                    }
                }
                String attrValue = parseDN(subject, subjectAttributeName);
                set.addAll(search(attrName, "*" + attrValue + "*", attrs));
                if (serial != null
                    && params.getSearchForSerialNumberIn() != null)
                {
                    attrValue = serial;
                    attrName = params.getSearchForSerialNumberIn();
                    set.addAll(search(attrName, "*" + attrValue + "*", attrs));
                }
            }
            else
            {
                set.addAll(search(attrName, "*", attrs));
            }
        }
        catch (IOException e)
        {
            throw new CertStoreException("exception processing selector: " + e);
        }

        return set;
    }

    private Set getEndCertificates(X509CertSelector xselector)
        throws CertStoreException
    {
        String[] attrs = {params.getUserCertificateAttribute()};
        String attrName = params.getLdapUserCertificateAttributeName();
        String subjectAttributeName = params.getUserCertificateSubjectAttributeName();

        Set set = certSubjectSerialSearch(xselector, attrs, attrName,
            subjectAttributeName);
        return set;
    }

    private Set getCACertificates(X509CertSelector xselector)
        throws CertStoreException
    {
        String[] attrs = {params.getCACertificateAttribute()};
        String attrName = params.getLdapCACertificateAttributeName();
        String subjectAttributeName = params
            .getCACertificateSubjectAttributeName();
        Set set = certSubjectSerialSearch(xselector, attrs, attrName,
            subjectAttributeName);

        if (set.isEmpty())
        {
            set.addAll(search(null, "*", attrs));
        }

        return set;
    }

    private Set getCrossCertificates(X509CertSelector xselector)
        throws CertStoreException
    {
        String[] attrs = {params.getCrossCertificateAttribute()};
        String attrName = params.getLdapCrossCertificateAttributeName();
        String subjectAttributeName = params
            .getCrossCertificateSubjectAttributeName();
        Set set = certSubjectSerialSearch(xselector, attrs, attrName,
            subjectAttributeName);

        if (set.isEmpty())
        {
            set.addAll(search(null, "*", attrs));
        }

        return set;
    }

    public Collection engineGetCRLs(CRLSelector selector)
        throws CertStoreException
    {
        String[] attrs = {params.getCertificateRevocationListAttribute()};
        if (!(selector instanceof X509CRLSelector))
        {
            throw new CertStoreException("selector is not a X509CRLSelector");
        }
        X509CRLSelector xselector = (X509CRLSelector)selector;

        Set crlSet = new HashSet();

        String attrName = params.getLdapCertificateRevocationListAttributeName();
        Set set = new HashSet();

        if (xselector.getIssuerNames() != null)
        {
            for (Iterator it = xselector.getIssuerNames().iterator(); it
                .hasNext();)
            {
                Object o = it.next();
                String attrValue = null;
                if (o instanceof String)
                {
                    String issuerAttributeName = params
                        .getCertificateRevocationListIssuerAttributeName();
                    attrValue = parseDN((String)o, issuerAttributeName);
                }
                else
                {
                    String issuerAttributeName = params
                        .getCertificateRevocationListIssuerAttributeName();
                    attrValue = parseDN(new X500Principal((byte[])o)
                        .getName("RFC1779"), issuerAttributeName);
                }
                set.addAll(search(attrName, "*" + attrValue + "*", attrs));
            }
        }
        else
        {
            set.addAll(search(attrName, "*", attrs));
        }
        set.addAll(search(null, "*", attrs));
        Iterator it = set.iterator();

        try
        {
            CertificateFactory cf = CertificateFactory.getInstance("X.509",
                BouncyCastleProvider.PROVIDER_NAME);
            while (it.hasNext())
            {
                CRL crl = cf.generateCRL(new ByteArrayInputStream((byte[])it
                    .next()));
                if (xselector.match(crl))
                {
                    crlSet.add(crl);
                }
            }
        }
        catch (Exception e)
        {
            throw new CertStoreException(
                "CRL cannot be constructed from LDAP result " + e);
        }

        return crlSet;
    }
    private static String[] FILTER_ESCAPE_TABLE = new String['\\' + 1];

    static
    {

        // Filter encoding table -------------------------------------

        // fill with char itself
        for (char c = 0; c < FILTER_ESCAPE_TABLE.length; c++)
        {
            FILTER_ESCAPE_TABLE[c] = String.valueOf(c);
        }

        // escapes (RFC2254)
        FILTER_ESCAPE_TABLE['*'] = "\\2a";
        FILTER_ESCAPE_TABLE['('] = "\\28";
        FILTER_ESCAPE_TABLE[')'] = "\\29";
        FILTER_ESCAPE_TABLE['\\'] = "\\5c";
        FILTER_ESCAPE_TABLE[0] = "\\00";

    }

    /**
     * Escape a value for use in a filter.
     * @param value the value to escape.
     * @return a properly escaped representation of the supplied value.
     */
    private String filterEncode(String value)
    {
        if (value == null)
        {
            return null;
        }

        // make buffer roomy
        StringBuilder encodedValue = new StringBuilder(value.length() * 2);

        int length = value.length();

        for (int i = 0; i < length; i++)
        {
            char c = value.charAt(i);

            if (c < FILTER_ESCAPE_TABLE.length)
            {
                encodedValue.append(FILTER_ESCAPE_TABLE[c]);
            }
            else
            {
                // default: add the char
                encodedValue.append(c);
            }
        }

        return encodedValue.toString();
    }

    /**
     * Returns a Set of byte arrays with the certificate or CRL encodings.
     *
     * @param attributeName  The attribute name to look for in the LDAP.
     * @param attributeValue The value the attribute name must have.
     * @param attrs          The attributes in the LDAP which hold the certificate,
     *                       certificate pair or CRL in a found entry.
     * @return Set of byte arrays with the certificate encodings.
     */
    private Set search(String attributeName, String attributeValue,
                       String[] attrs) throws CertStoreException
    {
        String filter = attributeName + "=" + filterEncode(attributeValue);
//        System.out.println(filter);
        if (attributeName == null)
        {
            filter = null;
        }
        DirContext ctx = null;
        Set set = new HashSet();
        try
        {
            ctx = connectLDAP();

            SearchControls constraints = new SearchControls();
            constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
            constraints.setCountLimit(0);
            for (int i = 0; i < attrs.length; i++)
            {
                String temp[] = new String[1];
                temp[0] = attrs[i];
                constraints.setReturningAttributes(temp);

                String filter2 = "(&(" + filter + ")(" + temp[0] + "=*))";
                if (filter == null)
                {
                    filter2 = "(" + temp[0] + "=*)";
                }
                NamingEnumeration results = ctx.search(params.getBaseDN(),
                    filter2, constraints);
                while (results.hasMoreElements())
                {
                    SearchResult sr = (SearchResult)results.next();
                    // should only be one attribute in the attribute set with
                    // one
                    // attribute value as byte array
                    NamingEnumeration enumeration = ((Attribute)(sr
                        .getAttributes().getAll().next())).getAll();
                    while (enumeration.hasMore())
                    {
                        Object o = enumeration.next();
                        set.add(o);
                    }
                }
            }
        }
        catch (Exception e)
        {
            throw new CertStoreException(
                "Error getting results from LDAP directory " + e);

        }
        finally
        {
            try
            {
                if (null != ctx)
                {
                    ctx.close();
                }
            }
            catch (Exception e)
            {
            }
        }
        return set;
    }

}

Output:
【漏洞类型】LDAP注入漏洞
【严重性】High
【漏洞摘要】原始代码中，`parseDN`函数对输入字符串`subject`进行处理时，直接返回了未进行任何转义处理的子字符串，该子字符串直接用于LDAP搜索过滤器。如果攻击者能够控制`subject`的值，他们可以通过在其中插入恶意字符（如星号`*`、左括号`(`、右括号`)`、反斜杠`\`等）来构造一个恶意的LDAP过滤器，从而绕过身份验证或其他安全控制机制。这种漏洞被称为LDAP注入漏洞，可能导致数据泄露、未经授权的访问或其他安全问题。
【关键代码模式】与`parseDN`函数相关的关键代码模式包括：
- `parseDN`函数，用于从`subject`字符串中提取特定属性值，并返回未转义的属性值。
- `filterEncode`函数，用于对字符串进行转义处理，但未在`parseDN`函数中调用。
- `search`函数，使用未转义的属性值构建LDAP搜索过滤器。
【修复方法说明】修复方法通过在`parseDN`函数中调用`filterEncode`函数对提取的属性值进行转义处理，从而防止LDAP注入攻击。最佳实践是确保在构建LDAP搜索过滤器时，所有动态输入都经过适当的转义处理。