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## 内容1
### 文件路径：
openam-federation/openam-federation-library/src/main/java/com/sun/identity/saml/common/SAMLUtils.java
### 代码内容：
package com.sun.identity.saml.common;

import static org.forgerock.openam.utils.Time.*;

import java.util.Collections;
import java.util.Date;
import java.util.Map;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.HashSet;
import java.util.Enumeration;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.StringTokenizer;

import java.text.StringCharacterIterator;
import java.text.CharacterIterator;
import java.io.UnsupportedEncodingException;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.ByteArrayInputStream;

import java.security.MessageDigest;

import java.net.URL;
import java.net.MalformedURLException;

import org.w3c.dom.*;

import com.sun.identity.common.PeriodicGroupRunnable;
import com.sun.identity.common.ScheduleableGroupAction;
import com.sun.identity.common.SystemConfigurationUtil;
import com.sun.identity.common.SystemConfigurationException;
import com.sun.identity.common.SystemTimerPool;
import com.sun.identity.common.TaskRunnable;
import com.sun.identity.common.TimerPool;
import com.sun.identity.shared.xml.XMLUtils;
import com.sun.identity.shared.encode.URLEncDec;
import com.sun.identity.shared.encode.Base64;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;

import javax.xml.soap.MimeHeaders;
import javax.xml.soap.MimeHeader;

import com.sun.identity.saml.assertion.SubjectConfirmation;
import com.sun.identity.saml.assertion.Assertion;
import com.sun.identity.saml.assertion.Attribute;
import com.sun.identity.saml.assertion.AttributeStatement;
import com.sun.identity.saml.assertion.AuthenticationStatement;
import com.sun.identity.saml.assertion.AudienceRestrictionCondition;
import com.sun.identity.saml.assertion.Condition;
import com.sun.identity.saml.assertion.Conditions;
import com.sun.identity.saml.assertion.Statement;
import com.sun.identity.saml.assertion.SubjectStatement;
import com.sun.identity.saml.xmlsig.XMLSignatureManager;
import com.sun.identity.saml.plugins.PartnerAccountMapper;
import com.sun.identity.saml.protocol.*;
import com.sun.identity.saml.servlet.POSTCleanUpRunnable;
import com.sun.identity.plugin.session.SessionException;
import com.sun.identity.plugin.session.SessionManager;
import com.sun.identity.plugin.session.SessionProvider;
import com.sun.identity.saml.assertion.Subject;
import com.sun.identity.saml.SAMLClient;
import com.sun.identity.federation.common.FSUtils;

import javax.xml.parsers.DocumentBuilder;

import org.apache.xml.security.c14n.Canonicalizer;

/**
 * This class contains some utility methods for processing SAML protocols.
 *
 *
 */
public class SAMLUtils  extends SAMLUtilsCommon {

    /**
     * Attribute that specifies maximum content length for SAML request in
     * AMConfig.properties file.
     */
    public static final String HTTP_MAX_CONTENT_LENGTH =
        "com.sun.identity.saml.request.maxContentLength";

    /**
     * Default maximum content length is set to 16k.
     */
    public static final int defaultMaxLength = 16384;

    /**
     * Default maximum content length in string format.
     */
    public static final String DEFAULT_CONTENT_LENGTH =
    String.valueOf(defaultMaxLength);

    private static final String ERROR_JSP = "/saml2/jsp/autosubmittingerror.jsp";

    private static int maxContentLength = 0;
    private static Map idTimeMap = Collections.synchronizedMap(new HashMap());
    private static TaskRunnable cGoThrough = null;
    private static TaskRunnable cPeriodic = null;
    private static Object ssoToken;

    static {
        org.apache.xml.security.Init.init();
        if (SystemConfigurationUtil.isServerMode()) {
            long period = ((Integer) SAMLServiceManager.getAttribute(
                        SAMLConstants.CLEANUP_INTERVAL_NAME)).intValue() * 1000;
            cGoThrough = new POSTCleanUpRunnable(period, idTimeMap);
            TimerPool timerPool = SystemTimerPool.getTimerPool();
            timerPool.schedule(cGoThrough, new Date(((currentTimeMillis()
                    + period) / 1000) * 1000));
            ScheduleableGroupAction periodicAction = new
                ScheduleableGroupAction() {
                public void doGroupAction(Object obj) {
                    idTimeMap.remove(obj);
                }
            };
            cPeriodic = new PeriodicGroupRunnable(periodicAction, period,
                180000, true);
            timerPool.schedule(cPeriodic, new Date(((currentTimeMillis() +
                    period) / 1000) * 1000));
        }
        try {
            maxContentLength = Integer.parseInt(SystemConfigurationUtil.
                getProperty(SAMLUtils.HTTP_MAX_CONTENT_LENGTH,
                SAMLUtils.DEFAULT_CONTENT_LENGTH));
        } catch (NumberFormatException ne) {
            SAMLUtils.debug.error("Wrong format of SAML request max content "
                + "length. Take default value.");
            maxContentLength=  SAMLUtils.defaultMaxLength;
        }
    }

    /**
     * Constructor
     * iPlanet-PRIVATE-DEFAULT-CONSTRUCTOR
     */
    private SAMLUtils() {
    }

    /**
     * Generates an ID String with length of SAMLConstants.ID_LENGTH.
     * @return string the ID String; or null if it fails.
     */
    public static String generateAssertionID() {
        String encodedID = generateID();
        if (encodedID == null) {
            return null;
        }

        String id = null;
        try {
            id = SystemConfigurationUtil.getServerID(
            SAMLServiceManager.getServerProtocol(),
            SAMLServiceManager.getServerHost(),
            Integer.parseInt(SAMLServiceManager.getServerPort()),
            SAMLServiceManager.getServerURI());
        } catch (Exception ex) {
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("SAMLUtil:generateAssertionID: "
                + "exception obtain serverID:", ex);
            }
        }
        if (id == null) {
            return encodedID;
        } else {
            return (encodedID + id);
        }
    }

    /**
     * Verifies if an element is a type of a specific query.
     * Currently, this method is used by class AuthenticationQuery,
     * AuthorizationDecisionQuery, and AttributeQuery.
     * @param element a DOM Element which needs to be verified.
     * @param queryname A specific name of a query, for example,
     *          AuthenticationQuery, AuthorizationDecisionQuery, or
     *                AttributeQuery.
     * @return true if the element is a type of the specified query; false
     *                otherwise.
     */
    public static boolean checkQuery(Element element, String queryname) {
        String tag = element.getLocalName();
        if (tag == null) {
            return false;
        } else if (tag.equals("Query") || tag.equals("SubjectQuery")) {
            NamedNodeMap nm = element.getAttributes();
            int len = nm.getLength();
            String attrName;
            Attr attr;
            boolean found = false;
            for (int j = 0; j < len; j++) {
                attr = (Attr) nm.item(j);
                attrName = attr.getLocalName();
                if ((attrName != null) && (attrName.equals("type")) &&
                (attr.getNodeValue().equals(queryname + "Type"))) {
                    found = true;
                    break;
                }
            }
            if (!found) {
                return false;
            }
        } else if (!tag.equals(queryname)) {
            return false;
        }
        return true;
    }

    /**
     * Generates sourceID of a site.
     * @param siteURL a String that uniquely identifies a site.
     * @return Base64 encoded SHA digest of siteURL.
     */
    public static String generateSourceID(String siteURL) {
        if ((siteURL == null) || (siteURL.length() == 0)) {
            SAMLUtils.debug.error("SAMLUtils.genrateSourceID: empty siteURL.");
            return null;
        }
        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance("SHA");
        } catch (Exception e) {
            SAMLUtils.debug.error("SAMLUtils.generateSourceID: Exception when"
            + " generating digest:",e);
            return null;
        }
        md.update(SAMLUtils.stringToByteArray(siteURL));
        byte byteResult[] = md.digest();
        String result = null;
        try {
            result = Base64.encode(byteResult).trim();
        } catch (Exception e) {
            SAMLUtils.debug.error("SAMLUtils.generateSourceID: Exception:",e);
        }
        return result;
    }

    /**
     * Generates assertion handle.
     * @return 20-byte random string to be used to form an artifact.
     */
    public static String generateAssertionHandle() {
        if (random == null) {
            return null;
        }
        byte bytes[] = new byte[SAMLConstants.ID_LENGTH];
        random.nextBytes(bytes);
        String id = null;
        try {
            id = SystemConfigurationUtil.getServerID(
                SAMLServiceManager.getServerProtocol(),
                SAMLServiceManager.getServerHost(),
                Integer.parseInt(SAMLServiceManager.getServerPort()),
                SAMLServiceManager.getServerURI());
        } catch (Exception ex) {
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("SAMLUtil:generateAssertionHandle: "
                + "exception obtain serverID:", ex);
            }
        }
        if (id != null) {
            byte idBytes[] = stringToByteArray(id);
            // TODO: should we check if idBytes.length == 2 ?
            if (idBytes.length < bytes.length) {
                for (int i = 1; i <= idBytes.length; i++) {
                    bytes[bytes.length - i] = idBytes[idBytes.length - i];
                }
            }
        }
        return byteArrayToString(bytes);
    }

    /**
     * Converts a HEX encoded string to a byte array.
     * @param hexString HEX encoded string
     * @return byte array.
     */
    public static byte[] hexStringToByteArray(String hexString) {
        int read = hexString.length();
        byte[] byteArray = new byte[read/2];
        for (int i=0, j=0; i < read; i++, j++) {
            String part = hexString.substring(i,i+2);
            byteArray[j] =
            new Short(Integer.toString(Integer.parseInt(part,16))).
            byteValue();
            i++;
        }
        return byteArray;
    }

    /**
     * Converts HEX encoded string to Base64 encoded string.
     * @param hexString HEX encoded string.
     * @return Base64 encoded string.
     */
    public static String hexStringToBase64(String hexString) {
        int read = hexString.length();
        byte[] byteArray = new byte[read/2];
        for (int i=0, j=0; i < read; i++, j++) {
            String part = hexString.substring(i,i+2);
            byteArray[j] =
            new Short(Integer.toString(Integer.parseInt(part,16))).
            byteValue();
            i++;
        }
        String encodedID = null;
        try {
            encodedID = Base64.encode(byteArray).trim();
        } catch (Exception e) {
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("SAMLUtil:hexStringToBase64: "
                + "exception encode input:", e);
            }
        }
        if (SAMLUtils.debug.messageEnabled()) {
            SAMLUtils.debug.message("base 64 source id is :"+encodedID);
        }
        return encodedID;
    }

    /**
     * Gets sourceSite corresponding to an issuer from the partner URL list.
     * @param issuer The issuer string.
     * @return SAMLServiceManager.SOAPEntry of the issuer if it's on the list;
     *                        null otherwise.
     */
    public static SAMLServiceManager.SOAPEntry getSourceSite(String issuer) {
        if (issuer == null) {
            return null;
        }
        Map entries = (Map) SAMLServiceManager.getAttribute(
        SAMLConstants.PARTNER_URLS);
        if (entries == null) {
            SAMLUtils.debug.error("SAMLUtils.isOnPartnerURLList: PartnerURL "
            + "list is null.");
            return null;
        }

        Iterator entryIter = entries.values().iterator();
        boolean found = false;
        SAMLServiceManager.SOAPEntry srcSite = null;
        String theIssuer = null;
        while (entryIter.hasNext()) {
            srcSite = (SAMLServiceManager.SOAPEntry) entryIter.next();
            if ((srcSite != null) &&
            ((theIssuer = srcSite.getIssuer()) != null) &&
            (theIssuer.equals(issuer))) {
                found = true;
                break;
            }
        }
        if (found) {
            return srcSite;
        } else {
            return null;
        }
    }

    /**
     * Returns site ID based on the host name. The site ID
     * will be in Base64 encoded format. This method will print out site ID
     * to the standard output
     * @param args host name
     */
    public static void main(String args[]) {

        if (args.length != 1) {
            System.out.println("usage : java SAMLUtils <host_name>");
            return;
        }

        System.out.println(generateSourceID(args[0]));
    }

    /**
     * Checks if a SubjectConfirmation is correct.
     * @param sc SubjectConfirmation instance to be checked.
     * @return true if the SubjectConfirmation instance passed in
     * has only one ConfirmationMethod, and this
     * ConfirmationMethod is set to
     * SAMLConstants.CONFIRMATION_METHOD_IS.
     */
    public static boolean isCorrectConfirmationMethod(SubjectConfirmation sc) {
        if (sc == null) {
            return false;
        }

        Set cmSet = sc.getConfirmationMethod();
        if ((cmSet == null) || (cmSet.size() != 1)) {
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("SAMLUtils.isCorrectConfirmationMethod:"
                + " missing ConfirmationMethod in the Subject.");
            }
            return false;
        }

        String conMethod = (String) cmSet.iterator().next();
        if ((conMethod == null) ||
        (!conMethod.equals(SAMLConstants.CONFIRMATION_METHOD_IS))) {
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("SAMLUtils.isCorrectConfirmationMethod:"
                + " wrong ConfirmationMethod value.");
            }
            return false;
        }

        return true;
    }

    /**
     * Returns true if the assertion is valid both time wise and
     * signature wise, and contains at least one AuthenticationStatement.
     * @param assertion Assertion instance to be checked.
     * @return true if the assertion is valid both time wise and
     * signature wise, and contains at least one AuthenticationStatement.
     */
    public static boolean isAuthNAssertion(Assertion assertion) {
        if (assertion == null) {
            return false;
        }

        if ((!assertion.isTimeValid()) || (!assertion.isSignatureValid())) {
            return false;
        }

        Set statements = assertion.getStatement();
        Statement statement = null;
        Iterator iterator = statements.iterator();
        while (iterator.hasNext()) {
            statement = (Statement) iterator.next();
            if (statement.getStatementType() ==
            Statement.AUTHENTICATION_STATEMENT) {
                return true;
            }
        } // loop through statements
        return false;
    }

    /**
     * Converts a string to a byte array.
     * @param input a String to be converted.
     * @return result byte array.
     */
    public static byte[] stringToByteArray(String input) {
        char chars[] = input.toCharArray();
        byte bytes[] = new byte[chars.length];
        for (int i = 0; i < chars.length; i++) {
            bytes[i] = (byte) chars[i];
        }
        return bytes;
    }

    /**
     * Returns server ID.
     * @param idTypeString An ID string
     * @return server ID part of the id.
     */
    public static String getServerID(String idTypeString) {
        if (idTypeString == null) {
            return null;
        }
        int len = idTypeString.length();
        String id = null;
        if (len >= SAMLConstants.SERVER_ID_LENGTH) {
            id = idTypeString.substring((len - SAMLConstants.SERVER_ID_LENGTH),
            len);
            return id;
        } else {
            return null;
        }
    }

    /**
     * Returns server url of a site.
     * @param str Server ID.
     * @return Server url corresponding to the server id.
     */
    public static String getServerURL(String str) {
        String id = SAMLUtils.getServerID(str);
        if (id == null) {
            return null;
        }

        if (SAMLUtils.debug.messageEnabled()) {
            SAMLUtils.debug.message("SAMLUtils.getServerURL: id=" + id);
        }

        String remoteUrl = null;
        try {
            remoteUrl = SystemConfigurationUtil.getServerFromID(id);
        } catch (SystemConfigurationException se) {
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("SAMLUtils.getServerURL: ServerEntry" +
                "NotFoundException for " + id);
            }
            return null;
        }
        String thisUrl = SAMLServiceManager.getServerURL();
        if (SAMLUtils.debug.messageEnabled()) {
            SAMLUtils.debug.message("SAMLUtils.getServerURL: remoteUrl=" +
            remoteUrl + ", thisUrl=" + thisUrl);
        }
        if ((remoteUrl == null) || (thisUrl == null) ||
        (remoteUrl.equalsIgnoreCase(thisUrl))) {
            return null;
        } else {
            return remoteUrl;
        }
    }

    /**
     * Returns full service url.
     * @param shortUrl short URL of the service.
     * @return full service url.
     */
    public static String getFullServiceURL(String shortUrl) {
        String result = null;
        try {
            URL u = new URL(shortUrl);
            URL weburl = SystemConfigurationUtil.getServiceURL(
                SAMLConstants.SAML_AM_NAMING, u.getProtocol(), u.getHost(),
                    u.getPort(), u.getPath());
            result = weburl.toString();
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("SAMLUtils.getFullServiceURL:" +
                "full remote URL is: " + result);
            }
        } catch (Exception e) {
            if (SAMLUtils.debug.warningEnabled()) {
                SAMLUtils.debug.warning("SAMLUtils.getFullServiceURL:" +
                "Exception:", e);
            }
        }
        return result;
    }

    /**
     * Returns attributes included in AttributeStatement of the
     * assertion.
     * @param envParameters return map which includes name value pairs of
     *   attributes included in AttributeStatement of the assertion
     * @param assertion an Assertion object which contains
     *   AttributeStatement
     * @param subject the Subject instance from
     *   AuthenticationStatement. The Subject
     *   included in AttributeStatement must match this
     *   Subject instance.
     */
    public static void addEnvParamsFromAssertion(Map envParameters,
    Assertion assertion,
    com.sun.identity.saml.assertion.Subject subject) {
        Set statements = assertion.getStatement();
        Statement statement = null;
        Iterator stmtIter = null;
        List attrs = null;
        Iterator attrIter = null;
        Attribute attribute = null;
        Element attrValue = null;
        List attrValues = null;
        String attrName = null;
        String attrValueString = null;
        if ((statements != null) && (!statements.isEmpty())) {
            stmtIter = statements.iterator();
            while (stmtIter.hasNext()) {
                statement = (Statement) stmtIter.next();
                if (statement.getStatementType() ==
                Statement.ATTRIBUTE_STATEMENT) {
                    // check for subject
                    if (!subject.equals(
                    ((AttributeStatement)statement).getSubject())) {
                        continue;
                    }

                    attrs = ((AttributeStatement) statement).getAttribute();
                    attrIter = attrs.iterator();
                    while (attrIter.hasNext()) {
                        attribute = (Attribute) attrIter.next();
                        try {
                            attrValues = attribute.getAttributeValue();
                        } catch (Exception e) {
                            debug.error("SAMLUtils.addEnvParamsFromAssertion:"+
                            " cannot obtain attribute value:", e);
                            continue;
                        }
                        attrName = attribute.getAttributeName();
                        List attrValueList = null;

                        for(Iterator avIter = attrValues.iterator();
                            avIter.hasNext(); ) {

                            attrValue = (Element) avIter.next();
                            if (!XMLUtils.hasElementChild(attrValue)) {
                                attrValueString =
                                    XMLUtils.getElementValue(attrValue);
                                if (attrValueList == null) {
                                    attrValueList = new ArrayList();
                                }
                                attrValueList.add(attrValueString);
                            }
                        }
                        if (attrValueList != null) {
                            if (debug.messageEnabled()) {
                                debug.message(
                                    "SAMLUtils.addEnvParamsFromAssertion:" +
                                    " attrName = " + attrName +
                                    " attrValue = " + attrValueList);
                            }
                            String[] attrValueStrs = (String[])attrValueList.
                                toArray(new String[attrValueList.size()]);
                            try {
                                envParameters.put(attrName, attrValueStrs);
                            } catch (Exception ex) {
                                if (debug.messageEnabled()) {
                                    debug.message(
                                        "SAMLUtils.addEnvParamsFromAssertion:",
                                        ex);
                                }
                            }
                        } else if (debug.messageEnabled()) {
                            if (debug.messageEnabled()) {
                                debug.message(
                                    "SAMLUtils.addEnvParamsFromAssertion:" +
                                    " attrName = " + attrName +
                                    " has no value");
                            }
                        }
                    }
                } // if it's an attribute statement
            }
        }
    }

    /**
     * Returns maximum content length of a SAML request.
     * @return maximum content length of a SAML request.
     */
    public static int getMaxContentLength() {
        return maxContentLength;
    }

    // ************************************************************************
    // Methods used by SAML Servlets
    // ************************************************************************

    /**
     * Checks content length of a http request to avoid dos attack.
     * In case SAML inter-op with other SAML vendor who may not provide content
     * length in HttpServletRequest. We decide to support no length restriction
     * for Http communication. Here, we use a special value (e.g. 0) to
     * indicate that no enforcement is required.
     * @param request HttpServletRequest instance to be checked.
     * @exception ServletException if context length of the request exceeds
     *   maximum content length allowed.
     */
    public static void checkHTTPContentLength(HttpServletRequest request)
    throws ServletException {
        if (maxContentLength != 0) {
            int length =  request.getContentLength();
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("HttpRequest content length= " +length);
            }
            if (length > maxContentLength) {
                if (SAMLUtils.debug.messageEnabled()) {
                    SAMLUtils.debug.message(
                        "content length too large" + length);
                }
                throw new ServletException(
                SAMLUtils.bundle.getString("largeContentLength"));
            }
        }
    }

    /**
     * Post assertions and attributes to the target url.
     * This method opens a URL connection to the target specified and POSTs
     * assertions to it using the passed HttpServletResponse object. It POSTs
     * multiple parameter names "assertion" with value being each of the
     * Assertion in the passed Set.
     * @param response HttpServletResponse object
     * @param out The print writer which for content is to be written too.
     * @param assertion List of Assertions to be posted.
     * @param targeturl target url
     * @param attrMap Map of attributes to be posted to the target
     */
    public static void postToTarget(HttpServletResponse response, PrintWriter out,
                                    List assertion, String targeturl, Map attrMap) throws IOException {
        out.println("");
        out.println("\n");
        out.println("<TITLE>Access rights validated</TITLE>\n");
        out.println("\n");
        out.println("");
        Iterator it = null;
        if (SAMLUtils.debug.messageEnabled()) {
            out.println("
Access rights validated
\n");
            out.println("<meta http-equiv=\"refresh\" content=\"20\">\n");
            out.println("
We have verified your access rights " +
            " according to the assertion shown "
            +"below. \n");
            out.println("You are being redirected to the resource.\n");
            out.println("Please wait ......\n");
            out.println("
\n");
            out.println("

\n");
            if (assertion != null) {
                it = assertion.iterator();
                while (it.hasNext()) {
                    out.println(SAMLUtils.displayXML((String)it.next()));
                }
            }
            out.println("
\n");
        }
        out.println("<FORM METHOD=\"POST\" ACTION=\"" + targeturl + "\">");
        if (assertion != null) {
            it = assertion.iterator();
            while (it.hasNext()) {
                out.println("<INPUT TYPE=\"HIDDEN\" NAME=\""+
                SAMLConstants.POST_ASSERTION_NAME + "\"");
                out.println("VALUE=\"" +
                    URLEncDec.encode((String)it.next()) + "\">");
            }
        }
        if (attrMap != null && !attrMap.isEmpty()) {
            StringBuffer attrNamesSB = new StringBuffer();
            Set entrySet = attrMap.entrySet();
            for(Iterator iter = entrySet.iterator(); iter.hasNext();) {
                Map.Entry entry = (Map.Entry)iter.next();
                String attrName = HTMLEncode((String)entry.getKey(), '\"');
                String attrValue = HTMLEncode((String)entry.getValue(), '\"');
                out.println("<INPUT TYPE=\"HIDDEN\" NAME=\""+ attrName +
                "\" VALUE=\"" + attrValue + "\">");
                if (attrNamesSB.length() > 0) {
                    attrNamesSB.append(":");
                }
                attrNamesSB.append(attrName);
            }
            out.println("<INPUT TYPE=\"HIDDEN\" NAME=\""+
            SAMLConstants.POST_ATTR_NAMES + "\" VALUE=\"" +
            attrNamesSB + "\">");
        }
        out.println("</FORM>");
        out.println("");
        out.close();
    }

    /**
     * Returns true of false based on whether the target passed as parameter
     * accepts form POST.
     * @param targetIn url to be checked
     * @return true if it should post assertion to the target passed in; false
     *   otherwise.
     */
    public static boolean postYN(String targetIn) {
        SAMLUtils.debug.message("Inside postYN()");
        if ((targetIn == null) || (targetIn.length() == 0)) {
            return false;
        }
        Set targets = (Set) SAMLServiceManager.
        getAttribute(SAMLConstants.POST_TO_TARGET_URLS);
        if ((targets == null) || (targets.size() == 0)) {
            return false;
        }
        URL targetUrl = null;
        try {
            targetUrl = new URL(targetIn);
        } catch (MalformedURLException me ) {
            SAMLUtils.debug.error("SAMLUtils:postYN(): Malformed URL passed");
            return false;
        }
        String targetInHost = targetUrl.getHost();
        int targetInPort = targetUrl.getPort();
        String targetInPath = targetUrl.getPath();
        // making target string without protocol
        String targetToCompare = new StringBuffer(targetInHost.toLowerCase())
        .append(":").append(String.valueOf(targetInPort))
        .append("/").append(targetInPath).toString();
        if (targets.contains(targetToCompare)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Replaces every occurence of ch with
     * "&#<ascii code of ch>;"
     * @param srcStr orginal string to to be encoded.
     * @param ch the charactor needs to be encoded.
     * @return encoded string
     */
    public static String HTMLEncode(String srcStr, char ch) {
        if (srcStr == null) {
            return null;
        }

        int fromIndex = 0;
        int toIndex;
        StringBuffer dstSB = new StringBuffer();

        while((toIndex = srcStr.indexOf(ch, fromIndex)) != -1) {
            dstSB.append(srcStr.substring(fromIndex, toIndex))
            .append("&#" + (int)ch + ";");
            fromIndex = toIndex + 1;
        }
        dstSB.append(srcStr.substring(fromIndex));

        return dstSB.toString();
    }

    /**
     * Displays an XML string.
     * This is a utility function used to hack up an HTML display of an XML
     * string.
     * @param input original string
     * @return encoded string so it can be displayed properly by html.
     */
    public static String displayXML(String input) {
        debug.message("In displayXML ");
        StringCharacterIterator iter = new StringCharacterIterator(input);
        StringBuffer buf = new StringBuffer();

        for(char c = iter.first();c != CharacterIterator.DONE;c = iter.next()) {
            if (c=='>') {
                buf.append(">");
            } else if (c=='<') {
                buf.append("<");
            } else if (c=='\n'){
                buf.append("
\n");
            } else {
                buf.append(c);
            }
        }
        return buf.toString();
    }

    /**
     * Gets the list of Assertion objects from a list of
     * 'String' assertions.
     * @param assertions List of assertions in string format
     * @return List of Assertion objects
     */
    public static List getListOfAssertions(List assertions) {
        List returnAssertions = new ArrayList();
        try {
            if (assertions != null) {
                Iterator it = assertions.iterator();
                while (it.hasNext()) {
                    Document doc = XMLUtils.toDOMDocument((String)it.next(),
                                                            debug);
                    Element root = doc.getDocumentElement();
                    if (root != null) {
                        Assertion assertion = new Assertion(root);
                        returnAssertions.add(assertion);
                    }
                }
            }
        } catch (Exception e) {
            if (debug.messageEnabled()) {
                debug.message("SAMLUtils.getListOfAssertions : " +
                "Exception : ", e);
            }
        }
        return returnAssertions;
    }

    // ************************************************************************
    // Methods used / shared by SAML Authentication Module and SAML Servlets
    // ************************************************************************

    /**
     * Returns byte array from a SAML Response.
     * @param samlResponse Response object
     * @return byte array
     * @exception SAMLException if error occurrs during the process.
     */
    public static byte[] getResponseBytes(Response samlResponse)
        throws SAMLException
    {
        byte ret[] = null;
        try {
            ret = samlResponse.toString(true, true, true).
            getBytes(SAMLConstants.DEFAULT_ENCODING);
        } catch (UnsupportedEncodingException ue) {
            if (debug.messageEnabled()) {
                debug.message("getResponseBytes : " , ue);
            }
            throw new SAMLException(ue.getMessage());
        }
        return ret;
    }

    /**
     * Returns Response object from byte array.
     * @param bytes byte array
     * @return Response object
     */
    public static Response getResponse(byte [] bytes) {
        Response temp = null;
        if (bytes == null) {
            return null;
        }
        try {
            temp = Response.parseXML(new ByteArrayInputStream(bytes));
        } catch (SAMLException se) {
            debug.error("getResponse : " , se);
        }
        return temp;
    }

    /**
     * Verifies a Response.
     * @param response SAML Response object
     * @param requestUrl this server's POST profile URL
     * @param request HttpServletRequest object
     * @return true if the response is valid; false otherwise.
     */
    public static boolean verifyResponse(Response response,
    String requestUrl, HttpServletRequest request) {
        if (!response.isSignatureValid()) {
            debug.message("verifyResponse: Response's signature is invalid.");
            return false;
        }

        // check Recipient == this server's POST profile URL(requestURL)
        String recipient = response.getRecipient();
        if ((recipient == null) || (recipient.length() == 0) ||
        ((!equalURL(recipient, requestUrl)) &&
        (!equalURL(recipient,getLBURL(requestUrl, request))))) {
            debug.error("verifyResponse : Incorrect Recipient.");
            return false;
        }

        // check status of the Response
        if (!response.getStatus().getStatusCode().getValue().endsWith(
        SAMLConstants.STATUS_CODE_SUCCESS_NO_PREFIX)) {
            debug.error("verifyResponse : Incorrect StatusCode value.");
            return false;
        }

        return true;
    }

    private static String getLBURL(String requestUrl,
                                 HttpServletRequest request)
    {
        String host = request.getHeader("host");
        if (host == null) {
            return requestUrl;
        }
        int index = requestUrl.indexOf("//");
        if (index == -1) {
            return requestUrl;
        }
        StringBuffer sb = new StringBuffer(200);
        sb.append(requestUrl.substring(0, index + 2)).append(host);
        String rest = requestUrl.substring(index +2, requestUrl.length());
        if ((index = rest.indexOf("/")) != -1) {
            sb.append(rest.substring(index, rest.length()));
        }
        if (debug.messageEnabled()) {
            debug.message("getLBURL: LBURL = " + sb.toString());
        }
        return sb.toString().trim();
    }

    // ************************************************************************
    // Methods used by SAML Authentication Module
    // ************************************************************************

    /**
     * Gets List of assertions in String format from a list of
     * Assertion objects.
     * @param assertions List of Assertion objects.
     * @return List of assertions in String format
     */
    public static List getStrAssertions(List assertions) {
        List returnAssertions = new ArrayList();
        if (assertions != null) {
            Iterator it = assertions.iterator();
            while (it.hasNext()) {
                returnAssertions.add(
                    ((Assertion)(it.next())).toString(true,true));
            }
        }
        return returnAssertions;
    }

    /**
     * Verifies Signature for Post response.
     * @param samlResponse Response object from post profile.
     * @return true if the signature on the reponse is valid; false otherwise.
     */
    public static boolean verifySignature(Response samlResponse) {
        if ((samlResponse != null) &&
        (!samlResponse.isSigned() || (!samlResponse.isSignatureValid()))) {
            return false;
        }
        return true;
    }

    /**
     * Gets Attribute Map to be set in the Session.
     * @param partnerdest SOAPEntry object
     * @param assertions List of Assertions
     * @param subject Subject object
     * @param target target of final SSO
     * @return Map which contains name and attributes.
     * @exception Exception if an error occurrs.
     */
    public static Map getAttributeMap(
    SAMLServiceManager.SOAPEntry partnerdest,
    List assertions,
    com.sun.identity.saml.assertion.Subject subject,
    String target)
    throws Exception {
        String srcID = partnerdest.getSourceID();
        String name = null;
        String org = null;
        Map attrMap = new HashMap();
        PartnerAccountMapper paMapper = partnerdest.getPartnerAccountMapper();

        if (paMapper != null) {
            Map map = paMapper.getUser(assertions, srcID, target);
            name = (String) map.get(PartnerAccountMapper.NAME);
            org =  (String) map.get(PartnerAccountMapper.ORG);
            attrMap = (Map) map.get(PartnerAccountMapper.ATTRIBUTE);
        }

        if (attrMap == null) {
            attrMap = new HashMap();
        }
        attrMap.put(SAMLConstants.USER_NAME, name);
        if ((org != null) && (org.length() != 0)) {
            attrMap.put(SessionProvider.REALM, org);
        } else {
            attrMap.put(SessionProvider.REALM, "/");
        }

        if (debug.messageEnabled()) {
            debug.message("getAttributeMap : " + "name = " +
            name + ", realm=" + org + ", attrMap = " + attrMap);
        }

        return attrMap;
    }

    /**
     * Checks response and get back a Map of relevant data including,
     * Subject, SOAPEntry for the partner and the List of Assertions.
     * @param response Response object
     * @return Map of data including Subject, SOAPEntry, and list of assertions.
     */
    public static Map verifyAssertionAndGetSSMap(Response response) {
        // loop to check assertions
        com.sun.identity.saml.assertion.Subject subject = null;
        SAMLServiceManager.SOAPEntry srcSite = null;
        List assertions = response.getAssertion();
        Iterator iter = assertions.iterator();
        Assertion assertion = null;
        String aIDString = null;
        String issuer = null;
        Iterator stmtIter = null;
        Statement statement = null;
        int stmtType = Statement.NOT_SUPPORTED;
        com.sun.identity.saml.assertion.Subject sub = null;
        SubjectConfirmation subConf = null;
        Set confMethods = null;
        String confMethod = null;
        Date date = null;
        while (iter.hasNext()) {
            assertion = (Assertion) iter.next();
            aIDString = assertion.getAssertionID();
            // make sure it's not being used
            if (idTimeMap.containsKey(aIDString)) {
                debug.error("verifyAssertion "
                + "AndGetSSMap: Assertion: " + aIDString + " is used.");
                return null;
            }

            // check issuer of the assertions
            issuer = assertion.getIssuer();
            if ((srcSite = SAMLUtils.getSourceSite(issuer)) == null) {
                debug.error("verifyAsserti "
                + "onAndGetSSMap: issuer is not on the Partner list.");
                return null;
            }

            if (!assertion.isSignatureValid()) {
                debug.error("verifyAssertion "
                + "AndGetSSMap: assertion's signature is not valid.");
                return null;
            }

            // must be valid (timewise)
            if (!assertion.isTimeValid()) {
                debug.error("verifyAssertion "
                + "AndGetSSMap: assertion's time is not valid.");
                return null;
            }

            // TODO: IssuerInstant of the assertion is within a few minutes
            // This is a MAY in spec. Which number to use for the few minutes?

            // TODO: check AudienceRestrictionCondition

            //for each assertion, loop to check each statement
            stmtIter = assertion.getStatement().iterator();
            while (stmtIter.hasNext()) {
                statement = (Statement) stmtIter.next();
                stmtType = statement.getStatementType();
                if ((stmtType == Statement.AUTHENTICATION_STATEMENT) ||
                (stmtType == Statement.ATTRIBUTE_STATEMENT) ||
                (stmtType == Statement.AUTHORIZATION_DECISION_STATEMENT)) {
                    sub = ((SubjectStatement)statement).getSubject();

                    // ConfirmationMethod of each subject must be set to bearer
                    if (((subConf = sub.getSubjectConfirmation()) == null) ||
                    ((confMethods = subConf.getConfirmationMethod())
                    == null) ||
                    (confMethods.size() != 1)) {
                        debug.error("verify "
                        + "AssertionAndGetSSMap: missing or extra "
                        + "ConfirmationMethod.");
                        return null;
                    }
                    if (((confMethod = (String) confMethods.iterator().next())
                    == null) ||
                    (!confMethod.equals(
                    SAMLConstants.CONFIRMATION_METHOD_BEARER))) {
                        debug.error("verify "
                        + "AssertionAndGetSSMap:wrong ConfirmationMethod.");
                        return null;
                    }

                    //TODO: must contain same Subject for all statements?

                    if (stmtType == Statement.AUTHENTICATION_STATEMENT) {
                        //TODO: if it has SubjectLocality,its IP must == sender
                        // browser IP. This is a MAY item in the spec.
                        if (subject == null) {
                            subject = sub;
                        }
                    }
                }
            }

            // add the assertion to idTimeMap
            if (debug.messageEnabled()) {
                debug.message("Adding " + aIDString + " to idTimeMap.");
            }
            Conditions conds = assertion.getConditions();
            if ((conds != null) && ((date = conds.getNotOnorAfter()) != null)) {
                cGoThrough.addElement(aIDString);
                idTimeMap.put(aIDString, new Long(date.getTime()));
            } else {
                cPeriodic.addElement(aIDString);
                // it doesn't matter what we store for the value.
                idTimeMap.put(aIDString, aIDString);
            }
        }

        // must have at least one SSO assertion
        if ((subject == null) || (srcSite == null)) {
            debug.error("verifyAssertion AndGetSSMap: couldn't find Subject.");
            return null;
        }
        Map ssMap = new HashMap();
        ssMap.put(SAMLConstants.SUBJECT, subject);
        ssMap.put(SAMLConstants.SOURCE_SITE_SOAP_ENTRY, srcSite);
        ssMap.put(SAMLConstants.POST_ASSERTION, assertions);
        return ssMap;
    }

    /**
     * Checks if the Assertion is time valid and
     * if the Assertion is allowed by AudienceRestrictionCondition.
     *
     * @param assertion an Assertion object
     * @return true if the operation is successful otherwise, return false
     * @exception IOException IOException
     */
    private static boolean checkCondition(Assertion assertion)
        throws IOException
    {
        if (assertion == null) {
            return false;
        }
        if (!assertion.isSignatureValid()) {
            debug.error(bundle.getString("assertionSignatureNotValid"));
            return false;
        }
        // check if the Assertion is time valid
        if (!(assertion.isTimeValid())) {
            debug.error(bundle.getString("assertionTimeNotValid"));
            return false;
        }
        // check the Assertion is allowed by AudienceRestrictionCondition
        Conditions cnds = assertion.getConditions();
        Set audienceCnd = new HashSet();
        audienceCnd = cnds.getAudienceRestrictionCondition();
        Iterator it = null;
        if (audienceCnd != null) {
            if (!audienceCnd.isEmpty()) {
                it = audienceCnd.iterator();
                while (it.hasNext()) {
                    if ((((AudienceRestrictionCondition) it.next()).
                    evaluate()) == Condition.INDETERMINATE ) {
                        if (debug.messageEnabled()) {
                            debug.message("Audience " +
                            "RestrictionConditions is indeterminate.");
                        }
                    } else {
                        debug.error("Failed AudienceRestrictionCondition");
                        return false;
                    }
                }
            }
        }
        return true;
    }

    /**
     * Determines if there is a valid SSO Assertion
     * inside of SAML Response.
     *
     * @param assertions a List of Assertion objects
     * @return a Subject object
     * @exception IOException IOException
     */
    public static com.sun.identity.saml.assertion.Subject examAssertions(
    List assertions) throws IOException {
        if (assertions == null) {
            return null;
        }
        boolean validation = false;
        com.sun.identity.saml.assertion.Subject subject = null;
        Iterator iter = assertions.iterator();

        while (iter.hasNext()) {
            Assertion assertion = (Assertion)iter.next();

            if (!checkCondition(assertion)) {
                return null;
            }
            debug.message("Passed checking Conditions!");

            // exam the Statement inside the Assertion
            Set statements = new HashSet();
            statements = assertion.getStatement();

            if (statements == null || statements.isEmpty()) {
                debug.error(bundle.getString("noStatement"));
                return null;
            }
            Iterator iterator = statements.iterator();
            while (iterator.hasNext()) {
                Statement statement = (Statement) iterator.next();
                subject = ((SubjectStatement)statement).getSubject();
                SubjectConfirmation sc = subject.getSubjectConfirmation();
                Set cm = new HashSet();
                cm =  sc.getConfirmationMethod();
                if (cm == null || cm.isEmpty()) {
                    debug.error("Subject confirmation method is null");
                    return null;
                }
                String conMethod = (String) cm.iterator().next();
                // add checking artifact confirmation method identifier based
                // on Assertion version number
                if ((conMethod != null) && (assertion.getMajorVersion() ==
                SAMLConstants.ASSERTION_MAJOR_VERSION) &&
                (((assertion.getMinorVersion() ==
                SAMLConstants.ASSERTION_MINOR_VERSION_ONE) &&
                conMethod.equals(SAMLConstants.CONFIRMATION_METHOD_ARTIFACT))
                ||
                ((assertion.getMinorVersion() ==
                SAMLConstants.ASSERTION_MINOR_VERSION_ZERO) &&
                (conMethod.equals(
                SAMLConstants.DEPRECATED_CONFIRMATION_METHOD_ARTIFACT))))) {
                    if (debug.messageEnabled()) {
                        debug.message("Correct Confirmation method");
                    }
                } else {
                    debug.error("Wrong Confirmation Method.");
                    return null;
                }
                if (statement instanceof AuthenticationStatement) {
                    //found an SSO Assertion
                    validation = true;
                }
            }  // end of  while (iterator.hasNext()) for Statements
        } // end of while (iter.hasNext()) for Assertions

        if (!validation) {
            debug.error(bundle.getString("noSSOAssertion"));
            return null;
        }
        return subject;
    }

    /**
     * Return whether the signature on the object is valid or not.
     * @param xmlString input XML String
     * @param idAttribute ASSERTION_ID_ATTRIBUTE or RESPONSE_ID_ATTRIBUTE
     * @param issuer the issuer of the Assertion
     * @return true if the signature on the object is valid; false otherwise.
     */
    public static boolean checkSignatureValid(String xmlString,
                                                  String idAttribute,
                                                  String issuer)
    {
            String certAlias = null;
            boolean valid = true;
            Map entries = (Map) SAMLServiceManager.getAttribute(
                                SAMLConstants.PARTNER_URLS);
        if (entries != null) {
            SAMLServiceManager.SOAPEntry srcSite =
                (SAMLServiceManager.SOAPEntry) entries.get(issuer);
            if (srcSite != null) {
                certAlias = srcSite.getCertAlias();
            }
        }

        try {
            SAMLUtils.debug.message("SAMLUtils.checkSignatureValid for certAlias {}", certAlias);
            XMLSignatureManager manager = XMLSignatureManager.getInstance();
            valid = manager.verifyXMLSignature(xmlString,
                                   idAttribute, certAlias);
        } catch (Exception e) {
            SAMLUtils.debug.warning("SAMLUtils.checkSignatureValid:"+
                                " signature validation exception", e);
            valid = false;
        }
        if (!valid) {
            if (SAMLUtils.debug.messageEnabled()) {
                SAMLUtils.debug.message("SAMLUtils.checkSignatureValid:"+
                                        " Couldn't verify signature.");
            }
        }
        return valid;
    }

    /**
     * Sets the given HttpServletResponse object with the
     * headers in the given MimeHeaders object.
     * @param headers the MimeHeaders object
     * @param response the HttpServletResponse object to which the
     *        headers are to be written.
     */
    public static void setMimeHeaders(
         MimeHeaders headers, HttpServletResponse response) {

         if(headers == null || response == null) {
            debug.message("SAMLUtils.setMimeHeaders : null input");
            return;
         }

         for (Iterator iter = headers.getAllHeaders(); iter.hasNext();){
              MimeHeader header = (MimeHeader)iter.next();

              String[] values = headers.getHeader(header.getName());
              if (values.length == 1) {
                  response.setHeader(header.getName(), header.getValue());
              } else {
                  StringBuffer concat = new StringBuffer();
                  int i = 0;
                  while (i < values.length) {
                      if (i != 0) {
                          concat.append(',');
                      }
                      concat.append(values[i++]);
                   }
                   response.setHeader(header.getName(),concat.toString());
              }

         }
         return;
    }

    /**
     * Returns a MimeHeaders object that contains the headers
     * in the given HttpServletRequest object.
     *
     * @param req the HttpServletRequest object.
     * @return a new MimeHeaders object containing the headers.
     */
    public static MimeHeaders getMimeHeaders(HttpServletRequest req) {

         MimeHeaders headers = new MimeHeaders();

         if(req == null) {
            debug.message("SAMLUtils.getMimeHeaders: null input");
            return headers;
         }

         Enumeration enumerator = req.getHeaderNames();

         while(enumerator.hasMoreElements()) {
             String headerName = (String)enumerator.nextElement();
             String headerValue = req.getHeader(headerName);

             StringTokenizer values = new StringTokenizer(headerValue, ",");
             while(values.hasMoreTokens()) {
                 headers.addHeader(headerName, values.nextToken().trim());
             }
         }

         return headers;
    }

    /**
     * Returns the authenticaion login url with goto parameter
     * in the given HttpServletRequest object.
     *
     * @param req the HttpServletRequest object.
     * @return a new authenticaion login url with goto parameter.
     */
    public static String getLoginRedirectURL(HttpServletRequest req) {
        String qs = req.getQueryString();
        String gotoUrl = req.getRequestURL().toString();
        String key = null;
        if (qs != null && qs.length() > 0) {
            gotoUrl = gotoUrl + "?" + qs;
            int startIdx = -1;
            int endIdx = -1;
            StringBuffer result = new StringBuffer();
            if ((startIdx = qs.indexOf((String) SAMLServiceManager.
                getAttribute(SAMLConstants.TARGET_SPECIFIER))) > 0) {
                result.append(qs.substring(0, startIdx - 1));
            }
            if ((endIdx = qs.indexOf("&", startIdx)) != -1) {
                if (startIdx == 0) {
                    result.append(qs.substring(endIdx + 1));
                } else {
                    result.append(qs.substring(endIdx));
                }
            }
            key = result.toString();
        }

        String reqUrl = req.getScheme() + "://" + req.getServerName() + ":" +
            req.getServerPort() + req.getContextPath();
        String redirectUrl = null;
        if (key == null || key.equals("")) {
            redirectUrl = reqUrl +"/UI/Login?goto=" +
                URLEncDec.encode(gotoUrl);
        } else {
            redirectUrl = reqUrl +"/UI/Login?" + key + "&goto="+
                URLEncDec.encode(gotoUrl);
        }
        if (SAMLUtils.debug.messageEnabled()) {
            SAMLUtils.debug.message("Redirect to auth login via:" +
                redirectUrl);
        }
        return redirectUrl;
    }

    /**
     * Processes SAML Artifact
     * @param artifact SAML Artifact
     * @param target Target URL
     * @return Attribute Map
     * @exception SAMLException if failed to get the Assertions or
     *     Attribute Map.
     */
    public static Map processArtifact(String[] artifact, String target)
        throws SAMLException {
        List assts = null;
        Subject assertionSubject = null;
        AssertionArtifact firstArtifact = null;
        Map sessMap = null;
        // Call SAMLClient to do the Single-sign-on
        try {
            assts = SAMLClient.artifactQueryHandler(artifact, (String) null);
            //exam the SAML response
            if ((assertionSubject = examAssertions(assts)) == null) {
                return null;
            }
            firstArtifact = new AssertionArtifact(artifact[0]);
            String sid = firstArtifact.getSourceID();
            Map partner = (Map) SAMLServiceManager.getAttribute(
                SAMLConstants.PARTNER_URLS);
            if (partner == null) {
                throw new SAMLException(bundle.getString
                    ("nullPartnerUrl"));
            }
            SAMLServiceManager.SOAPEntry partnerdest =
                (SAMLServiceManager.SOAPEntry) partner.get(sid);
            if (partnerdest == null) {
                throw new SAMLException(bundle.getString
                    ("failedAccountMapping"));
            }
            sessMap = getAttributeMap(partnerdest, assts,
                assertionSubject, target);
        } catch (Exception se) {
            debug.error("SAMLUtils.processArtifact :" , se);
            throw new SAMLException(
                bundle.getString("failProcessArtifact"));
        }
        return sessMap;
    }

    /**
     * Creates Session
     * @param request HttpServletRequest
     * @param response HttpServletResponse
     * @param attrMap Attribute Map
     * @exception if failed to create Session
     */
    public static Object generateSession(HttpServletRequest request,
        HttpServletResponse response,
        Map attrMap) throws SAMLException {
        Map sessionInfoMap = new HashMap();
        String realm = (String) attrMap.get(SessionProvider.REALM);
        if ((realm == null) || (realm.length() == 0)) {
            realm = "/";
        }
        sessionInfoMap.put(SessionProvider.REALM, realm);
        String principalName =
            (String) attrMap.get(SessionProvider.PRINCIPAL_NAME);
        if (principalName == null) {
            principalName = (String) attrMap.get(SAMLConstants.USER_NAME);
        }
        sessionInfoMap.put(SessionProvider.PRINCIPAL_NAME, principalName);
        //TODO: sessionInfoMap.put(SessionProvider.AUTH_LEVEL, "0");
        Object session = null;
        try {
            SessionProvider sessionProvider = SessionManager.getProvider();
            session = sessionProvider.createSession(
                sessionInfoMap, request, response, null);
            setAttrMapInSession(sessionProvider, attrMap, session);
        } catch (SessionException se) {
            if (debug.messageEnabled()) {
                debug.message("SAMLUtils.generateSession:", se);
            }
            throw new SAMLException(se);
        }
        return session;
    }

    /**
     * Processes SAML Response
     * @param samlResponse SAML Response object
     * @param target Target URL
     * @return Attribute Map
     * @exception SAMLException if failed to get Attribute Map.
     */
    public static Map processResponse(Response samlResponse, String target)
        throws SAMLException {
        List assertions = null;
        SAMLServiceManager.SOAPEntry partnerdest = null;
        Subject assertionSubject = null;
        if (samlResponse.isSigned()) {
            // verify the signature
            boolean isSignedandValid = verifySignature(samlResponse);
            if (!isSignedandValid) {
                throw new SAMLException(bundle.getString("invalidResponse"));
            }
        }
        // check Assertion and get back a Map of relevant data including,
        // Subject, SOAPEntry for the partner and the List of Assertions.
        Map ssMap = verifyAssertionAndGetSSMap(samlResponse);
        if (debug.messageEnabled()) {
            debug.message("processResponse: ssMap = " + ssMap);
        }

        if (ssMap == null) {
            throw new SAMLException(bundle.getString("invalidAssertion"));
        }
        assertionSubject = (com.sun.identity.saml.assertion.Subject)
            ssMap.get(SAMLConstants.SUBJECT);
        if (assertionSubject == null) {
            throw new SAMLException(bundle.getString("nullSubject"));
        }

        partnerdest = (SAMLServiceManager.SOAPEntry)ssMap
            .get(SAMLConstants.SOURCE_SITE_SOAP_ENTRY);
        if (partnerdest == null) {
            throw new SAMLException(bundle.getString("failedAccountMapping"));
        }

        assertions = (List)ssMap.get(SAMLConstants.POST_ASSERTION);
        Map sessMap = null;
        try {
            sessMap = getAttributeMap(partnerdest, assertions,
                assertionSubject, target);
        } catch (Exception se) {
            debug.error("SAMLUtils.processResponse :" , se);
            throw new SAMLException(
                bundle.getString("failProcessResponse"));
        }
        return sessMap;
    }

    /**
     *Sets the attribute map in the session
     *
     *@param attrMap, the Attribute Map
     *@param session, the valid session object
     *@exception SessionException if failed to set Attribute in the
     *    Session.
     */
    private static void setAttrMapInSession(
        SessionProvider sessionProvider,
        Map attrMap, Object session)
        throws SessionException {
        if (attrMap != null && !attrMap.isEmpty()) {
            Set entrySet = attrMap.entrySet();
            for(Iterator iter = entrySet.iterator(); iter.hasNext();) {
                Map.Entry entry = (Map.Entry)iter.next();
                String attrName = (String)entry.getKey();
                String[] attrValues = null;
                if (attrName.equals(SAMLConstants.USER_NAME) ||
                    attrName.equals(SessionProvider.PRINCIPAL_NAME)) {
                    String attrValue = (String)entry.getValue();
                    attrValues = new String[1];
                    attrValues[0] = attrValue;
                } else if (attrName.equals(SessionProvider.REALM) ||
                    attrName.equals(SessionProvider.AUTH_LEVEL)) {
                    // ignore
                    continue;
                } else {
                    attrValues = (String[])entry.getValue();
                }
                sessionProvider.setProperty(session, attrName, attrValues);
                if (debug.messageEnabled()) {
                    debug.message("SAMLUtils.setAttrMapInSessioin: attrName ="+
                        attrName);
                }
            }
        }
    }

    /**
     * Compares two URLs to see if they are equal. Two URLs are equal if
     * they have same protocol, host, port and path (case ignored).
     * Note : the method is provided to avoid URL.equals() call which requires
     * name lookup. Name lookup is a blocking operation and very expensive
     * if the hostname could not be resolved.
     *
     * @return true if the URLs are equal, false otherwise.
     */
    private static boolean equalURL(String url1, String url2) {
        try {
            URL u1 = new URL(url1);
            URL u2 = new URL(url2);
            int port1 = u1.getPort();
            if (port1 == -1) {
                port1 = u1.getDefaultPort();
            }
            int port2 = u2.getPort();
            if (port2 == -1) {
                port2 = u2.getDefaultPort();
            }
            if ((u1.getProtocol().equalsIgnoreCase(u2.getProtocol())) &&
                (u1.getHost().equalsIgnoreCase(u2.getHost())) &&
                (port1 == port2) &&
                (u1.getPath().equalsIgnoreCase(u2.getPath()))) {
                return true;
            } else {
                return false;
            }
        } catch (MalformedURLException m) {
            debug.message("Error in SAMLUtils.equalURL", m);
            return false;
        }
    }

      /**
       * Gets input Node Canonicalized
       *
       * @param node Node
       * @return Canonical element if the operation succeeded.
       *     Otherwise, return null.
       */
      public static Element getCanonicalElement(Node node) {
          try {
              Canonicalizer c14n = Canonicalizer.getInstance(
                  "http://www.w3.org/TR/2001/REC-xml-c14n-20010315");
              byte outputBytes[] = c14n.canonicalizeSubtree(node);
              DocumentBuilder documentBuilder =
                 XMLUtils.getSafeDocumentBuilder(false);
              Document doc = documentBuilder.parse(
                  new ByteArrayInputStream(outputBytes));
              Element result = doc.getDocumentElement();
              return result;
          } catch (Exception e) {
              SAMLUtils.debug.error("Response:getCanonicalElement: " +
                  "Error while performing canonicalization on " +
                  "the input Node.");
              return null;
          }
      }

     /**
      * Sends to error page URL for SAML protocols. If the error page is
      * hosted in the same web application, forward is used with
      * parameters. Otherwise, redirection or HTTP POST is used with
      * parameters.
      * Three parameters are passed to the error URL:
      *  -- errorcode : Error key, this is the I18n key of the error message.
      *  -- httpstatuscode : Http status code for the error
      *  -- message : detailed I18n'd error message
      * @param request HttpServletRequest object
      * @param response HttpServletResponse object
      * @param httpStatusCode Http Status code
      * @param errorCode Error code
      * @param errorMsg Detailed error message
      */
     public static void sendError(HttpServletRequest request,
         HttpServletResponse response, int httpStatusCode,
         String errorCode, String errorMsg) {
                 String errorUrl = SystemConfigurationUtil.getProperty(
               SAMLConstants.ERROR_PAGE_URL,
               SAMLConstants.DEFAULT_ERROR_PAGE_URL);
         if(debug.messageEnabled()) {
            debug.message("SAMLUtils.sendError: error page" + errorUrl);
         }
         String tmp = errorUrl.toLowerCase();
         if (!tmp.startsWith("http://") && !tmp.startsWith("https://")) {
             // use forward
             String jointString = "?";
             if (errorUrl.indexOf("?") != -1) {
                 jointString = "&";
             }
             String newUrl = errorUrl.trim() + jointString
                  + SAMLConstants.ERROR_CODE + "=" + errorCode + "&"
                  + SAMLConstants.HTTP_STATUS_CODE + "=" + httpStatusCode
                  + "&" + SAMLConstants.ERROR_MESSAGE + "="
                  + URLEncDec.encode(errorMsg);

             forwardRequest(newUrl, request, response);
         } else {
           String binding = SystemConfigurationUtil.getProperty(
                            SAMLConstants.ERROR_PAGE_HTTP_BINDING,
                            SAMLConstants.HTTP_POST);
           if(SAMLConstants.HTTP_REDIRECT.equals(binding)) {
               // use FSUtils, this may be redirection or forward
              String jointString = "?";
              if (errorUrl.indexOf("?") != -1) {
                  jointString = "&";
              }
              String newUrl = errorUrl.trim() + jointString
                   + SAMLConstants.ERROR_CODE + "=" + errorCode + "&"
                   + SAMLConstants.HTTP_STATUS_CODE + "=" + httpStatusCode
                   + "&" + SAMLConstants.ERROR_MESSAGE + "="
                   + URLEncDec.encode(errorMsg);

              FSUtils.forwardRequest(request, response, newUrl) ;
           } else {
               // Populate request attributes to be available for rendering.
               request.setAttribute("ERROR_URL", errorUrl);
               request.setAttribute("ERROR_CODE_NAME", SAMLConstants.ERROR_CODE);
               request.setAttribute("ERROR_CODE", errorCode);
               request.setAttribute("ERROR_MESSAGE_NAME", SAMLConstants.ERROR_MESSAGE);
               request.setAttribute("ERROR_MESSAGE", URLEncDec.encode(errorMsg));
               request.setAttribute("HTTP_STATUS_CODE_NAME", SAMLConstants.HTTP_STATUS_CODE);
               request.setAttribute("HTTP_STATUS_CODE", httpStatusCode);
               request.setAttribute("SAML_ERROR_KEY", bundle.getString("samlErrorKey"));
               // Forward to auto-submitting form.
               forwardRequest(ERROR_JSP, request, response);
           }
         }
     }

    /**
     * Forwards to the passed URL.
     *
     * @param url
     *         Forward URL
     * @param request
     *         Request object
     * @param response
     *         Response object
     */
    private static void forwardRequest(String url, HttpServletRequest request, HttpServletResponse response) {
        try {
            request.getRequestDispatcher(url).forward(request, response);

        } catch (ServletException sE) {
            handleForwardError(url, sE, response);
        } catch (IOException ioE) {
            handleForwardError(url, ioE, response);
        }
    }

    /**
     * Handle any forward error.
     *
     * @param url
     *         Attempted forward URL
     * @param exception
     *         Caught exception
     * @param response
     *         Response object
     */
    private static void handleForwardError(String url, Exception exception, HttpServletResponse response) {
        debug.error("SAMLUtils.sendError: Exception occurred while trying to forward to resource: " + url, exception);

        try {
            response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, exception.getMessage());
        } catch (IOException ioE) {
            debug.error("Failed to inform the response of caught exception", ioE);
        }
    }

}

Output:
【漏洞类型】未验证签名的SAML响应
【严重性】High
【漏洞摘要】SAML响应在验证过程中没有检查是否已签名，这可能导致攻击者提交未签名的恶意响应，绕过签名验证机制。具体表现为`verifyResponse`函数中缺少对响应是否已签名的检查。
【关键代码模式】`verifyResponse`函数、`verifySignature`函数、`Response`对象
【修复方法说明】修复方法通过在`verifyResponse`函数中添加对响应是否已签名的检查来解决问题，确保所有响应在处理前都必须经过签名验证。


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：
main/src/com/google/refine/io/FileProjectManager.java
### 代码内容：
package com.google.refine.io;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import com.google.refine.util.LocaleUtils;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
import org.apache.poi.util.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.refine.ProjectManager;
import com.google.refine.ProjectMetadata;
import com.google.refine.history.HistoryEntryManager;
import com.google.refine.model.Project;
import com.google.refine.preference.PreferenceStore;
import com.google.refine.preference.TopList;
import com.google.refine.util.ParsingUtilities;

public class FileProjectManager extends ProjectManager {

    final static protected String PROJECT_DIR_SUFFIX = ".project";

    protected File _workspaceDir;

    protected static boolean projectRemoved = false;

    final static Logger logger = LoggerFactory.getLogger("FileProjectManager");

    static public synchronized void initialize(File dir) {
        if (singleton != null) {
            logger.warn("Overwriting singleton already set: " + singleton);
        }
        logger.info("Using workspace directory: {}", dir.getAbsolutePath());
        singleton = new FileProjectManager(dir);
        // This needs our singleton set, thus the unconventional control flow
        ((FileProjectManager) singleton).recover();
    }

    protected FileProjectManager(File dir) {
        super();
        _workspaceDir = dir;
        if (!_workspaceDir.exists() && !_workspaceDir.mkdirs()) {
            logger.error("Failed to create directory : " + _workspaceDir);
            return;
        }

        load();
    }

    @JsonIgnore
    public File getWorkspaceDir() {
        return _workspaceDir;
    }

    static public File getProjectDir(File workspaceDir, long projectID) {
        File dir = new File(workspaceDir, projectID + PROJECT_DIR_SUFFIX);
        if (!dir.exists()) {
            dir.mkdir();
        }
        return dir;
    }

    @JsonIgnore
    public File getProjectDir(long projectID) {
        return getProjectDir(_workspaceDir, projectID);
    }

    /**
     * Import an external project that has been received as a .tar file, expanded, and copied into our workspace
     * directory.
     *
     * @param projectID
     */
    @Override
    public boolean loadProjectMetadata(long projectID) {
        synchronized (this) {
            ProjectMetadata metadata = ProjectMetadataUtilities.load(getProjectDir(projectID));
            if (metadata == null) {
                metadata = ProjectMetadataUtilities.recover(getProjectDir(projectID), projectID);
            }

            if (metadata != null) {
                _projectsMetadata.put(projectID, metadata);
                if (_projectsTags == null) {
                    _projectsTags = new HashMap<String, Integer>();
                }

                if (metadata != null && metadata.getTags() != null) {
                    for (String tag : metadata.getTags()) {
                        if (_projectsTags.containsKey(tag)) {
                            _projectsTags.put(tag, _projectsTags.get(tag) + 1);
                        } else {
                            _projectsTags.put(tag, 1);
                        }
                    }
                }
                return true;
            } else {
                return false;
            }
        }
    }

    @Override
    public void importProject(long projectID, InputStream inputStream, boolean gziped) throws IOException {
        File destDir = this.getProjectDir(projectID);
        destDir.mkdirs();

        if (gziped) {
            GZIPInputStream gis = new GZIPInputStream(inputStream);
            untar(destDir, gis);
        } else {
            untar(destDir, inputStream);
        }
    }

    protected void untar(File destDir, InputStream inputStream) throws IOException {
        TarArchiveInputStream tin = new TarArchiveInputStream(inputStream);
        TarArchiveEntry tarEntry = null;

        while ((tarEntry = tin.getNextTarEntry()) != null) {
            File destEntry = new File(destDir, tarEntry.getName());
            File parent = destEntry.getParentFile();

            if (!parent.exists()) {
                parent.mkdirs();
            }

            if (tarEntry.isDirectory()) {
                destEntry.mkdirs();
            } else {
                FileOutputStream fout = new FileOutputStream(destEntry);
                try {
                    IOUtils.copy(tin, fout);
                } finally {
                    fout.close();
                }
            }
        }

        tin.close();
    }

    @Override
    public void exportProject(long projectId, TarArchiveOutputStream tos) throws IOException {
        File dir = this.getProjectDir(projectId);
        this.tarDir("", dir, tos);
    }

    protected void tarDir(String relative, File dir, TarArchiveOutputStream tos) throws IOException {
        File[] files = dir.listFiles();
        if (files == null) return;
        for (File file : files) {
            if (file == null) continue;
            if (!file.isHidden()) {
                String path = relative + file.getName();

                if (file.isDirectory()) {
                    tarDir(path + File.separator, file, tos);
                } else {
                    TarArchiveEntry entry = new TarArchiveEntry(path);

                    entry.setMode(TarArchiveEntry.DEFAULT_FILE_MODE);
                    entry.setSize(file.length());
                    entry.setModTime(file.lastModified());

                    tos.putArchiveEntry(entry);

                    copyFile(file, tos);

                    tos.closeArchiveEntry();
                }
            }
        }
    }

    protected void copyFile(File file, OutputStream os) throws IOException {
        final int buffersize = 4096;

        FileInputStream fis = new FileInputStream(file);
        try {
            byte[] buf = new byte[buffersize];
            int count;

            while ((count = fis.read(buf, 0, buffersize)) != -1) {
                os.write(buf, 0, count);
            }
        } finally {
            fis.close();
        }
    }

    @Override
    public void saveMetadata(ProjectMetadata metadata, long projectId) throws Exception {
        File projectDir = getProjectDir(projectId);
        ProjectMetadataUtilities.save(metadata, projectDir);
    }

    @Override
    protected void saveProject(Project project) throws IOException {
        ProjectUtilities.save(project);
    }

    @Override
    public Project loadProject(long id) {
        return ProjectUtilities.load(getProjectDir(id), id);
    }

    /**
     * Save the workspace's data out to file in a safe way: save to a temporary file first and rename it to the real
     * file.
     */
    @Override
    protected void saveWorkspace() {
        synchronized (this) {
            // TODO refactor this so that we check if the save is needed before writing to the file!
            File tempFile = new File(_workspaceDir, "workspace.temp.json");
            try {
                if (!saveToFile(tempFile)) {
                    // If the save wasn't really needed, just keep what we had
                    tempFile.delete();
                    logger.info("Skipping unnecessary workspace save");
                    return;
                }
            } catch (Exception e) {
                e.printStackTrace();

                logger.warn("Failed to save workspace");
                return;
            }
            // set the workspace to owner-only readable, because it can contain credentials
            tempFile.setReadable(false, false);
            tempFile.setReadable(true, true);
            File file = new File(_workspaceDir, "workspace.json");
            File oldFile = new File(_workspaceDir, "workspace.old.json");

            if (oldFile.exists()) {
                oldFile.delete();
            }

            if (file.exists()) {
                file.renameTo(oldFile);
            }

            tempFile.renameTo(file);
            projectRemoved = false;
            logger.info("Saved workspace");
        }
    }

    protected List<Long> getModifiedProjectIds() {
        List<Long> modified = _projectsMetadata.entrySet().stream()
                .filter(e -> {
                    ProjectMetadata metadata = e.getValue();
                    if (metadata == null) return false;
                    return metadata.isDirty();
                }).map(Entry::getKey).collect(Collectors.toList());
        return modified;
    }

    protected void saveProjectMetadata(List<Long> modified) throws IOException {
        for (Long id : modified) {
            ProjectMetadata metadata = _projectsMetadata.get(id);
            if (metadata != null) {
                ProjectMetadataUtilities.save(metadata, getProjectDir(id));
            }
        }
    }

    protected boolean saveToFile(File file) throws IOException {
        OutputStream stream = new FileOutputStream(file);
        List<Long> modified = getModifiedProjectIds();
        boolean saveWasNeeded = (modified.size() > 0) || (_preferenceStore.isDirty());
        try {
            // writeValue(OutputStream) is documented to use JsonEncoding.UTF8
            ParsingUtilities.defaultWriter.writeValue(stream, this);
            saveProjectMetadata(modified);
        } finally {
            stream.close();
        }
        return saveWasNeeded;
    }

    @Override
    public void deleteProject(long projectID) {
        synchronized (this) {
            removeProject(projectID);

            File dir = getProjectDir(projectID);
            if (dir.exists()) {
                deleteDir(dir);
            }
        }
        projectRemoved = true;
        saveWorkspace();
    }

    static protected void deleteDir(File dir) {
        File[] files = dir.listFiles();
        if (files == null) return;
        for (File file : files) {
            if (file == null) continue;
            if (file.isDirectory()) {
                deleteDir(file);
            } else {
                file.delete();
            }
        }
        dir.delete();
    }

    protected void load() {
        if (loadFromFile(new File(_workspaceDir, "workspace.json"))) {
            return;
        }
        if (loadFromFile(new File(_workspaceDir, "workspace.temp.json"))) {
            return;
        }
        if (loadFromFile(new File(_workspaceDir, "workspace.old.json"))) {
            return;
        }
        logger.error("Failed to load workspace from any attempted alternatives.");
    }

    protected boolean loadFromFile(File file) {
        logger.info("Loading workspace: {}", file.getAbsolutePath());

        _projectsMetadata.clear();

        boolean found = false;

        if (file.exists() || file.canRead()) {
            try {
                ParsingUtilities.mapper.readerForUpdating(this).readValue(file);

                LocaleUtils.setLocale((String) this.getPreferenceStore().get("userLang"));

                found = true;
            } catch (IOException e) {
                logger.warn(e.toString());
            }
        }

        return found;
    }

    protected void recover() {
        boolean recovered = false;
        File[] files = _workspaceDir.listFiles();
        if (files == null) return;
        for (File file : files) {
            if (file == null) continue;
            if (file.isDirectory() && !file.isHidden()) {
                String dirName = file.getName();
                if (file.getName().endsWith(PROJECT_DIR_SUFFIX)) {
                    String idString = dirName.substring(0, dirName.length() - PROJECT_DIR_SUFFIX.length());
                    long id = -1;
                    try {
                        id = Long.parseLong(idString);
                    } catch (NumberFormatException e) {
                        // ignore
                    }

                    if (id > 0 && !_projectsMetadata.containsKey(id)) {
                        if (loadProjectMetadata(id)) {
                            logger.info("Recovered project named "
                                    + getProjectMetadata(id).getName()
                                    + " in directory " + dirName);
                            recovered = true;
                        } else {
                            logger.warn("Failed to recover project in directory " + dirName);

                            file.renameTo(new File(file.getParentFile(), dirName + ".corrupted"));
                        }
                    }
                }
            }
        }
        if (recovered) {
            saveWorkspace();
        }
    }

    @Override
    public HistoryEntryManager getHistoryEntryManager() {
        return new FileHistoryEntryManager();
    }

    public static void gzipTarToOutputStream(Project project, OutputStream os) throws IOException {
        GZIPOutputStream gos = new GZIPOutputStream(os);
        TarArchiveOutputStream tos = new TarArchiveOutputStream(gos);
        try {
            ProjectManager.singleton.exportProject(project.id, tos);
        } finally {
            tos.close();
            gos.close();
        }
    }

    @JsonProperty("projectIDs")
    public Set<Long> getProjectIds() {
        return _projectsMetadata.keySet();
    }

    @JsonProperty("projectIDs")
    protected void loadProjects(List<Long> projectIDs) {
        for (Long id : projectIDs) {

            File projectDir = getProjectDir(id);
            ProjectMetadata metadata = ProjectMetadataUtilities.load(projectDir);

            mergeEmptyUserMetadata(metadata);

            _projectsMetadata.put(id, metadata);

            if (metadata != null && metadata.getTags() != null) {
                for (String tag : metadata.getTags()) {
                    if (_projectsTags.containsKey(tag)) {
                        _projectsTags.put(tag, _projectsTags.get(tag) + 1);
                    } else {
                        _projectsTags.put(tag, 1);
                    }
                }
            }
        }
    }

    @JsonProperty("preferences")
    protected void setPreferences(PreferenceStore preferences) {
        if (preferences != null) {
            _preferenceStore = preferences;
        }
    }

    // backwards compatibility
    @JsonProperty("expressions")
    protected void setExpressions(TopList newExpressions) {
        if (newExpressions != null) {
            _preferenceStore.put("scripting.expressions", newExpressions);
        }
    }
}

Output:
【漏洞类型】路径遍历（Path Traversal）

【严重性】高

【漏洞摘要】此代码存在路径遍历漏洞，具体表现为在解压tar文件时，未对tar条目文件名进行验证，导致攻击者可能通过构造恶意文件名来访问或写入文件系统中的任意位置。问题出现在`FileProjectManager.untar`方法中，特别是在处理`tarEntry.getName()`时，没有确保该路径位于目标目录`destDir`之下，从而可能造成“zip slip”攻击。

【关键代码模式】
- `tarEntry.getName()`：获取tar文件中的条目文件名。
- `new File(destDir, tarEntry.getName())`：根据条目文件名创建目标文件对象。
- `FileOutputStream fout = new FileOutputStream(destEntry)`：将数据写入目标文件。
- `TarArchiveInputStream`：用于读取tar文件的输入流。

【修复方法说明】修复方法通过添加路径规范化检查来解决漏洞问题，确保解压的文件路径位于目标目录`destDir`之下，从而防止路径遍历攻击。具体实现是通过将`destEntry`和`destDir`的路径都进行规范化处理，然后检查`destEntry`的路径是否以`destDir`的路径开头。如果不符合，则抛出异常。

【最佳实践或安全编码技术】
- 对所有用户输入的文件路径进行规范化处理和验证，确保其位于预期的目录之下。
- 尽量避免使用依赖外部输入的文件路径操作，特别是当这些路径可以由用户控制时。
- 使用安全的API来处理文件系统操作，以减少潜在的安全风险。


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：
eventmesh-connector-plugin/eventmesh-connector-rabbitmq/src/main/java/org/apache/eventmesh/connector/rabbitmq/cloudevent/RabbitmqCloudEvent.java
### 代码内容：
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.eventmesh.connector.rabbitmq.cloudevent;

import org.apache.eventmesh.common.Constants;
import org.apache.eventmesh.common.utils.JsonUtils;
import org.apache.eventmesh.connector.rabbitmq.exception.RabbitmqaConnectorException;
import org.apache.eventmesh.connector.rabbitmq.utils.ByteArrayUtils;

import java.io.Serializable;
import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

import io.cloudevents.CloudEvent;
import io.cloudevents.SpecVersion;
import io.cloudevents.core.builder.CloudEventBuilder;

import com.fasterxml.jackson.core.type.TypeReference;

import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
public class RabbitmqCloudEvent implements Serializable {

    private SpecVersion version;
    private String data;
    private Map<String, String> extensions = new HashMap<>();

    public CloudEvent convertToCloudEvent() {
        CloudEventBuilder builder;
        switch (version) {
            case V03:
                builder = CloudEventBuilder.v03();
                break;
            case V1:
                builder = CloudEventBuilder.v1();
                break;
            default:
                throw new RabbitmqaConnectorException(String.format("CloudEvent version %s does not support.", version));
        }
        builder.withData(data.getBytes(StandardCharsets.UTF_8))
                .withId(extensions.remove("id"))
                .withSource(URI.create(extensions.remove("source")))
                .withType(extensions.remove("type"))
                .withDataContentType(extensions.remove("datacontenttype"))
                .withSubject(extensions.remove("subject"));
        extensions.forEach(builder::withExtension);

        return builder.build();
    }

    public static byte[] toByteArray(RabbitmqCloudEvent rabbitmqCloudEvent) throws Exception {
        Optional<byte[]> optionalBytes = ByteArrayUtils.objectToBytes(rabbitmqCloudEvent);
        return optionalBytes.orElseGet(() -> new byte[]{});
    }

    public static RabbitmqCloudEvent getFromByteArray(byte[] body) {
        return JsonUtils.deserialize(new String(body, Constants.DEFAULT_CHARSET), new TypeReference<RabbitmqCloudEvent>() {
        });
    }
}

## 内容2
### 文件路径：
eventmesh-connector-plugin/eventmesh-connector-rabbitmq/src/main/java/org/apache/eventmesh/connector/rabbitmq/utils/ByteArrayUtils.java
### 代码内容：
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.eventmesh.connector.rabbitmq.utils;

import org.apache.eventmesh.common.Constants;
import org.apache.eventmesh.common.utils.JsonUtils;

import java.io.IOException;
import java.util.Optional;

import com.fasterxml.jackson.core.type.TypeReference;

@SuppressWarnings("all")
public class ByteArrayUtils {

    public static <T> Optional<byte[]> objectToBytes(T obj) throws IOException {
        String s = JsonUtils.serialize(obj);
        byte[] bytes = s.getBytes();
        return Optional.ofNullable(bytes);
    }

    public static <T> Optional<T> bytesToObject(byte[] bytes) throws IOException, ClassNotFoundException {
        T t = JsonUtils.deserialize(new String(bytes, Constants.DEFAULT_CHARSET), new TypeReference<T>() {
        });
        return Optional.ofNullable(t);
    }
}

Output:
【漏洞类型】反序列化漏洞

【严重性】High

【漏洞摘要】反序列化漏洞是指在代码中对不受信任的数据进行反序列化操作，可能导致恶意代码执行。原始代码中的`ByteArrayUtils.bytesToObject`方法使用了Java的ObjectInputStream来反序列化字节数组，而`RabbitmqCloudEvent.getFromByteArray`方法则调用了这个方法。由于这些方法没有对输入数据进行任何验证，攻击者可以构造恶意的序列化数据，通过反序列化操作执行任意代码。

【关键代码模式】与反序列化漏洞相关的代码模式包括：
- 使用`ObjectInputStream.readObject`进行反序列化。
- 从不受信任的来源（如网络）读取数据并进行反序列化。
- 没有对反序列化对象进行验证或限制。

【修复方法说明】修复方法通过将反序列化操作从ObjectInputStream更改为使用Jackson库的JsonUtils进行，避免了Java原生反序列化的潜在风险。这种做法遵循了使用安全的序列化库的最佳实践，减少了代码执行恶意代码的风险。


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：
okio/src/jvmMain/kotlin/okio/GzipSource.kt
### 代码内容：
@file:JvmName("-GzipSourceExtensions")
@file:Suppress("NOTHING_TO_INLINE") // Aliases to public API.

package okio

import java.io.EOFException
import java.io.IOException
import java.util.zip.CRC32
import java.util.zip.Inflater

/**
 * A source that uses [GZIP](http://www.ietf.org/rfc/rfc1952.txt) to
 * decompress data read from another source.
 */
class GzipSource(source: Source) : Source {

  /** The current section. Always progresses forward. */
  private var section = SECTION_HEADER

  /**
   * Our source should yield a GZIP header (which we consume directly), followed
   * by deflated bytes (which we consume via an InflaterSource), followed by a
   * GZIP trailer (which we also consume directly).
   */
  private val source = RealBufferedSource(source)

  /** The inflater used to decompress the deflated body. */
  private val inflater = Inflater(true)

  /**
   * The inflater source takes care of moving data between compressed source and
   * decompressed sink buffers.
   */
  private val inflaterSource = InflaterSource(this.source, inflater)

  /** Checksum used to check both the GZIP header and decompressed body. */
  private val crc = CRC32()

  @Throws(IOException::class)
  override fun read(sink: Buffer, byteCount: Long): Long {
    require(byteCount >= 0L) { "byteCount < 0: $byteCount" }
    if (byteCount == 0L) return 0L

    // If we haven't consumed the header, we must consume it before anything else.
    if (section == SECTION_HEADER) {
      consumeHeader()
      section = SECTION_BODY
    }

    // Attempt to read at least a byte of the body. If we do, we're done.
    if (section == SECTION_BODY) {
      val offset = sink.size
      val result = inflaterSource.read(sink, byteCount)
      if (result != -1L) {
        updateCrc(sink, offset, result)
        return result
      }
      section = SECTION_TRAILER
    }

    // The body is exhausted; time to read the trailer. We always consume the
    // trailer before returning a -1 exhausted result; that way if you read to
    // the end of a GzipSource you guarantee that the CRC has been checked.
    if (section == SECTION_TRAILER) {
      consumeTrailer()
      section = SECTION_DONE

      // Gzip streams self-terminate: they return -1 before their underlying
      // source returns -1. Here we attempt to force the underlying stream to
      // return -1 which may trigger it to release its resources. If it doesn't
      // return -1, then our Gzip data finished prematurely!
      if (!source.exhausted()) {
        throw IOException("gzip finished without exhausting source")
      }
    }

    return -1
  }

  @Throws(IOException::class)
  private fun consumeHeader() {
    // Read the 10-byte header. We peek at the flags byte first so we know if we
    // need to CRC the entire header. Then we read the magic ID1ID2 sequence.
    // We can skip everything else in the first 10 bytes.
    // +---+---+---+---+---+---+---+---+---+---+
    // |ID1|ID2|CM |FLG|     MTIME     |XFL|OS | (more-->)
    // +---+---+---+---+---+---+---+---+---+---+
    source.require(10)
    val flags = source.buffer[3].toInt()
    val fhcrc = flags.getBit(FHCRC)
    if (fhcrc) updateCrc(source.buffer, 0, 10)

    val id1id2 = source.readShort()
    checkEqual("ID1ID2", 0x1f8b, id1id2.toInt())
    source.skip(8)

    // Skip optional extra fields.
    // +---+---+=================================+
    // | XLEN  |...XLEN bytes of "extra field"...| (more-->)
    // +---+---+=================================+
    if (flags.getBit(FEXTRA)) {
      source.require(2)
      if (fhcrc) updateCrc(source.buffer, 0, 2)
      val xlen = source.buffer.readShortLe().toLong()
      source.require(xlen)
      if (fhcrc) updateCrc(source.buffer, 0, xlen)
      source.skip(xlen)
    }

    // Skip an optional 0-terminated name.
    // +=========================================+
    // |...original file name, zero-terminated...| (more-->)
    // +=========================================+
    if (flags.getBit(FNAME)) {
      val index = source.indexOf(0)
      if (index == -1L) throw EOFException()
      if (fhcrc) updateCrc(source.buffer, 0, index + 1)
      source.skip(index + 1)
    }

    // Skip an optional 0-terminated comment.
    // +===================================+
    // |...file comment, zero-terminated...| (more-->)
    // +===================================+
    if (flags.getBit(FCOMMENT)) {
      val index = source.indexOf(0)
      if (index == -1L) throw EOFException()
      if (fhcrc) updateCrc(source.buffer, 0, index + 1)
      source.skip(index + 1)
    }

    // Confirm the optional header CRC.
    // +---+---+
    // | CRC16 |
    // +---+---+
    if (fhcrc) {
      checkEqual("FHCRC", source.readShortLe().toInt(), crc.value.toShort().toInt())
      crc.reset()
    }
  }

  @Throws(IOException::class)
  private fun consumeTrailer() {
    // Read the eight-byte trailer. Confirm the body's CRC and size.
    // +---+---+---+---+---+---+---+---+
    // |     CRC32     |     ISIZE     |
    // +---+---+---+---+---+---+---+---+
    checkEqual("CRC", source.readIntLe(), crc.value.toInt())
    checkEqual("ISIZE", source.readIntLe(), inflater.bytesWritten.toInt())
  }

  override fun timeout(): Timeout = source.timeout()

  @Throws(IOException::class)
  override fun close() = inflaterSource.close()

  /** Updates the CRC with the given bytes.  */
  private fun updateCrc(buffer: Buffer, offset: Long, byteCount: Long) {
    var offset = offset
    var byteCount = byteCount
    // Skip segments that we aren't checksumming.
    var s = buffer.head!!
    while (offset >= s.limit - s.pos) {
      offset -= s.limit - s.pos
      s = s.next!!
    }

    // Checksum one segment at a time.
    while (byteCount > 0) {
      val pos = (s.pos + offset).toInt()
      val toUpdate = minOf(s.limit - pos, byteCount).toInt()
      crc.update(s.data, pos, toUpdate)
      byteCount -= toUpdate
      offset = 0
      s = s.next!!
    }
  }

  private fun checkEqual(name: String, expected: Int, actual: Int) {
    if (actual != expected) {
      throw IOException("%s: actual 0x%08x != expected 0x%08x".format(name, actual, expected))
    }
  }
}

private inline fun Int.getBit(bit: Int) = this shr bit and 1 == 1

private const val FHCRC = 1
private const val FEXTRA = 2
private const val FNAME = 3
private const val FCOMMENT = 4

private const val SECTION_HEADER: Byte = 0
private const val SECTION_BODY: Byte = 1
private const val SECTION_TRAILER: Byte = 2
private const val SECTION_DONE: Byte = 3

/**
 * Returns a [GzipSource] that gzip-decompresses this [Source] while reading.
 *
 * @see GzipSource
 */
inline fun Source.gzip() = GzipSource(this)

Output:
【漏洞类型】整数溢出漏洞
【严重性】Medium
【漏洞摘要】在原始代码中，`GzipSource` 类的 `consumeHeader` 方法处理 GZIP 文件的头部时，使用了一个 `Short` 类型的变量 `xlen` 来存储可选字段的长度。然而，`Short` 类型是有符号的，因此如果 `xlen` 的值超过 0x7fff，会导致负数结果，从而可能引发整数溢出或数据损坏问题。具体问题出现在以下代码行：
```kotlin
val xlen = source.buffer.readShortLe().toLong()
```
根本原因在于代码未正确处理 `Short` 类型的无符号值，将其直接转换为 `Long` 类型可能导致数据解释错误。
【关键代码模式】与此漏洞相关的关键代码模式包括：
- 使用 `Short` 类型处理无符号数值。
- 直接将有符号 `Short` 转换为 `Long` 类型。
【修复方法说明】修复方法通过将 `Short` 类型的 `xlen` 转换为无符号整数，然后再转换为 `Long` 类型来解决问题：
```kotlin
val xlen = (source.buffer.readShortLe().toInt() and 0xffff).toLong()
```
这一修复方法确保了 `xlen` 被正确解释为无符号数值，避免了整数溢出的问题。最佳实践包括在处理无符号数值时始终使用无符号类型（如 `Int` 的无符号操作），并在涉及整数转换时进行边界检查和验证。