SEC-1078: Missed commit of default strategy class.
This commit is contained in:
Luke Taylor
parent
56c9117484
commit
95ab95b6e3
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package org.springframework.security.web.authentication.preauth.websphere;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.List;
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import javax.naming.Context;
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import javax.naming.InitialContext;
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import javax.naming.NamingException;
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import javax.rmi.PortableRemoteObject;
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import javax.security.auth.Subject;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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/**
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* WebSphere Security helper class to allow retrieval of the current username and groups.
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* <p>
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* See Spring Security Jira SEC-477.
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*
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* @author Ruud Senden
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* @author Stephane Manciot
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* @since 2.0
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*/
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final class DefaultWASUsernameAndGroupsExtractor implements WASUsernameAndGroupsExtractor {
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private static final Log logger = LogFactory.getLog(DefaultWASUsernameAndGroupsExtractor.class);
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private static final String USER_REGISTRY = "UserRegistry";
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private static Method getRunAsSubject = null;
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private static Method getGroupsForUser = null;
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private static Method getSecurityName = null;
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// SEC-803
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private static Class<?> wsCredentialClass = null;
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public final List<String> getGroupsForCurrentUser() {
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return getWebSphereGroups(getRunAsSubject());
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}
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public final String getCurrentUserName() {
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return getSecurityName(getRunAsSubject());
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}
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/**
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* Get the security name for the given subject.
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*
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* @param subject
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* The subject for which to retrieve the security name
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* @return String the security name for the given subject
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*/
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private static final String getSecurityName(final Subject subject) {
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if (logger.isDebugEnabled()) {
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logger.debug("Determining Websphere security name for subject " + subject);
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}
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String userSecurityName = null;
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if (subject != null) {
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// SEC-803
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Object credential = subject.getPublicCredentials(getWSCredentialClass()).iterator().next();
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if (credential != null) {
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userSecurityName = (String)invokeMethod(getSecurityNameMethod(),credential,null);
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}
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}
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if (logger.isDebugEnabled()) {
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logger.debug("Websphere security name is " + userSecurityName + " for subject " + subject);
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}
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return userSecurityName;
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}
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/**
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* Get the current RunAs subject.
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*
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* @return Subject the current RunAs subject
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*/
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private static final Subject getRunAsSubject() {
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logger.debug("Retrieving WebSphere RunAs subject");
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// get Subject: WSSubject.getCallerSubject ();
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return (Subject) invokeMethod(getRunAsSubjectMethod(), null, new Object[] {});
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}
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/**
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* Get the WebSphere group names for the given subject.
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*
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* @param subject
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* The subject for which to retrieve the WebSphere group names
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* @return the WebSphere group names for the given subject
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*/
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private static final List<String> getWebSphereGroups(final Subject subject) {
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return getWebSphereGroups(getSecurityName(subject));
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}
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/**
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* Get the WebSphere group names for the given security name.
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*
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* @param securityName
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* The security name for which to retrieve the WebSphere group names
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* @return the WebSphere group names for the given security name
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*/
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@SuppressWarnings("unchecked")
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private static final List<String> getWebSphereGroups(final String securityName) {
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Context ic = null;
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try {
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// TODO: Cache UserRegistry object
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ic = new InitialContext();
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Object objRef = ic.lookup(USER_REGISTRY);
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Object userReg = PortableRemoteObject.narrow(objRef, Class.forName ("com.ibm.websphere.security.UserRegistry"));
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if (logger.isDebugEnabled()) {
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logger.debug("Determining WebSphere groups for user " + securityName + " using WebSphere UserRegistry " + userReg);
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}
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final Collection groups = (Collection) invokeMethod(getGroupsForUserMethod(), userReg, new Object[]{ securityName });
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if (logger.isDebugEnabled()) {
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logger.debug("Groups for user " + securityName + ": " + groups.toString());
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}
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return new ArrayList(groups);
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} catch (Exception e) {
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logger.error("Exception occured while looking up groups for user", e);
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throw new RuntimeException("Exception occured while looking up groups for user", e);
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} finally {
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try {
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ic.close();
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} catch (NamingException e) {
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logger.debug("Exception occured while closing context", e);
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}
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}
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}
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private static final Object invokeMethod(Method method, Object instance, Object[] args)
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{
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try {
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return method.invoke(instance,args);
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} catch (IllegalArgumentException e) {
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logger.error("Error while invoking method "+method.getClass().getName()+"."+method.getName()+"("+ Arrays.asList(args)+")",e);
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throw new RuntimeException("Error while invoking method "+method.getClass().getName()+"."+method.getName()+"("+Arrays.asList(args)+")",e);
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} catch (IllegalAccessException e) {
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logger.error("Error while invoking method "+method.getClass().getName()+"."+method.getName()+"("+Arrays.asList(args)+")",e);
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throw new RuntimeException("Error while invoking method "+method.getClass().getName()+"."+method.getName()+"("+Arrays.asList(args)+")",e);
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} catch (InvocationTargetException e) {
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logger.error("Error while invoking method "+method.getClass().getName()+"."+method.getName()+"("+Arrays.asList(args)+")",e);
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throw new RuntimeException("Error while invoking method "+method.getClass().getName()+"."+method.getName()+"("+Arrays.asList(args)+")",e);
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}
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}
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private static final Method getMethod(String className, String methodName, String[] parameterTypeNames) {
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try {
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Class<?> c = Class.forName(className);
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final int len = parameterTypeNames.length;
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Class<?>[] parameterTypes = new Class[len];
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for (int i = 0; i < len; i++) {
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parameterTypes[i] = Class.forName(parameterTypeNames[i]);
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}
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return c.getDeclaredMethod(methodName, parameterTypes);
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} catch (ClassNotFoundException e) {
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logger.error("Required class"+className+" not found");
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throw new RuntimeException("Required class"+className+" not found",e);
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} catch (NoSuchMethodException e) {
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logger.error("Required method "+methodName+" with parameter types ("+ Arrays.asList(parameterTypeNames) +") not found on class "+className);
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throw new RuntimeException("Required class"+className+" not found",e);
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}
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}
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private static final Method getRunAsSubjectMethod() {
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if (getRunAsSubject == null) {
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getRunAsSubject = getMethod("com.ibm.websphere.security.auth.WSSubject", "getRunAsSubject", new String[] {});
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}
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return getRunAsSubject;
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}
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private static final Method getGroupsForUserMethod() {
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if (getGroupsForUser == null) {
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getGroupsForUser = getMethod("com.ibm.websphere.security.UserRegistry", "getGroupsForUser", new String[] { "java.lang.String" });
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}
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return getGroupsForUser;
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}
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private static final Method getSecurityNameMethod() {
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if (getSecurityName == null) {
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getSecurityName = getMethod("com.ibm.websphere.security.cred.WSCredential", "getSecurityName", new String[] {});
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}
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return getSecurityName;
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}
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// SEC-803
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private static final Class<?> getWSCredentialClass() {
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if (wsCredentialClass == null) {
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wsCredentialClass = getClass("com.ibm.websphere.security.cred.WSCredential");
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}
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return wsCredentialClass;
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}
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private static final Class<?> getClass(String className) {
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try {
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return Class.forName(className);
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} catch (ClassNotFoundException e) {
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logger.error("Required class " + className + " not found");
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throw new RuntimeException("Required class " + className + " not found",e);
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}
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}
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}
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