--- /dev/null
+package org.argeo.cms;
+
+import java.security.Principal;
+import java.security.PrivilegedAction;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Locale;
+import java.util.Set;
+import java.util.UUID;
+
+import javax.security.auth.Subject;
+import javax.security.auth.x500.X500Principal;
+
+import org.argeo.api.acr.NamespaceUtils;
+import org.argeo.api.cms.CmsConstants;
+import org.argeo.api.cms.CmsSession;
+import org.argeo.api.cms.CmsSessionId;
+import org.argeo.cms.internal.auth.CmsSessionImpl;
+import org.argeo.cms.internal.auth.ImpliedByPrincipal;
+import org.argeo.cms.internal.runtime.CmsContextImpl;
+import org.argeo.cms.util.CurrentSubject;
+import org.osgi.service.useradmin.Authorization;
+
+/**
+ * Programmatic access to the currently authenticated user, within a CMS
+ * context.
+ */
+public final class CurrentUser {
+ /*
+ * CURRENT USER API
+ */
+
+ /**
+ * Technical username of the currently authenticated user.
+ *
+ * @return the authenticated username or null if not authenticated / anonymous
+ */
+ public static String getUsername() {
+ return getUsername(currentSubject());
+ }
+
+ /**
+ * Human readable name of the currently authenticated user (typically first name
+ * and last name).
+ */
+ public static String getDisplayName() {
+ return getDisplayName(currentSubject());
+ }
+
+ /** Whether a user is currently authenticated. */
+ public static boolean isAnonymous() {
+ return isAnonymous(currentSubject());
+ }
+
+ /** Locale of the current user */
+ public final static Locale locale() {
+ return locale(currentSubject());
+ }
+
+ /** Roles of the currently logged-in user */
+ public final static Set<String> roles() {
+ return roles(currentSubject());
+ }
+
+ /** Returns true if the current user is in the specified role */
+ public static boolean isInRole(String role) {
+ Set<String> roles = roles();
+ return roles.contains(role);
+ }
+
+ /** Implies this {@link SystemRole} in this context. */
+ public final static boolean implies(SystemRole role, String context) {
+ return role.implied(currentSubject(), context);
+ }
+
+ /** Implies this role name, also independently of the context. */
+ public final static boolean implies(String role, String context) {
+ return SystemRole.implied(NamespaceUtils.parsePrefixedName(role), currentSubject(), context);
+ }
+
+ /** Executes as the current user */
+ public final static <T> T doAs(PrivilegedAction<T> action) {
+ return Subject.doAs(currentSubject(), action);
+ }
+
+ /** Executes as the current user */
+ public final static <T> T tryAs(PrivilegedExceptionAction<T> action) throws PrivilegedActionException {
+ return Subject.doAs(currentSubject(), action);
+ }
+
+ /*
+ * WRAPPERS
+ */
+
+ public final static String getUsername(Subject subject) {
+ if (subject == null)
+ throw new IllegalArgumentException("Subject cannot be null");
+ if (subject.getPrincipals(X500Principal.class).size() != 1)
+ return CmsConstants.ROLE_ANONYMOUS;
+ Principal principal = subject.getPrincipals(X500Principal.class).iterator().next();
+ return principal.getName();
+ }
+
+ public final static String getDisplayName(Subject subject) {
+ return getAuthorization(subject).toString();
+ }
+
+ public final static Set<String> roles(Subject subject) {
+ Set<String> roles = new HashSet<String>();
+ roles.add(getUsername(subject));
+ for (Principal group : subject.getPrincipals(ImpliedByPrincipal.class)) {
+ roles.add(group.getName());
+ }
+ return roles;
+ }
+
+ public final static Locale locale(Subject subject) {
+ Set<Locale> locales = subject.getPublicCredentials(Locale.class);
+ if (locales.isEmpty()) {
+ Locale defaultLocale = CmsContextImpl.getCmsContext().getDefaultLocale();
+ return defaultLocale;
+ } else
+ return locales.iterator().next();
+ }
+
+ /** Whether this user is currently authenticated. */
+ public static boolean isAnonymous(Subject subject) {
+ if (subject == null)
+ return true;
+ String username = getUsername(subject);
+ return username == null || username.equalsIgnoreCase(CmsConstants.ROLE_ANONYMOUS);
+ }
+
+ public static CmsSession getCmsSession() {
+ Subject subject = currentSubject();
+ Iterator<CmsSessionId> it = subject.getPrivateCredentials(CmsSessionId.class).iterator();
+ if (!it.hasNext())
+ throw new IllegalStateException("No CMS session id available for " + subject);
+ CmsSessionId cmsSessionId = it.next();
+ if (it.hasNext())
+ throw new IllegalStateException("More than one CMS session id available for " + subject);
+ return CmsContextImpl.getCmsContext().getCmsSessionByUuid(cmsSessionId.getUuid());
+ }
+
+ public static boolean isAvailable() {
+ return CurrentSubject.current() != null;
+ }
+
+ /*
+ * HELPERS
+ */
+ private static Subject currentSubject() {
+ Subject subject = CurrentSubject.current();
+ if (subject == null)
+ throw new IllegalStateException("Cannot find related subject");
+ return subject;
+ }
+
+ private static Authorization getAuthorization(Subject subject) {
+ return subject.getPrivateCredentials(Authorization.class).iterator().next();
+ }
+
+ public static boolean logoutCmsSession(Subject subject) {
+ UUID nodeSessionId;
+ if (subject.getPrivateCredentials(CmsSessionId.class).size() == 1)
+ nodeSessionId = subject.getPrivateCredentials(CmsSessionId.class).iterator().next().getUuid();
+ else
+ return false;
+ CmsSessionImpl cmsSession = CmsContextImpl.getCmsContext().getCmsSessionByUuid(nodeSessionId);
+
+ // FIXME logout all views
+ // TODO check why it is sometimes null
+ if (cmsSession != null)
+ cmsSession.close();
+ // if (log.isDebugEnabled())
+ // log.debug("Logged out CMS session " + cmsSession.getUuid());
+ return true;
+ }
+
+ /** singleton */
+ private CurrentUser() {
+ }
+}
projects / lgpl / argeo-commons.git / blobdiff