Source Code Cross Referenced for AclRealm.java in  » Web-Server » Jigsaw » org » w3c » jigsaw » acl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Server » Jigsaw » org.w3c.jigsaw.acl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // AclRealm.java
002:        // $Id: AclRealm.java,v 1.11 2007/02/10 12:51:18 ylafon Exp $
003:        // (c) COPYRIGHT MIT, INRIA and Keio, 1999.
004:        // Please first read the full copyright statement in file COPYRIGHT.html
005:
006:        package org.w3c.jigsaw.acl;
007:
008:        import java.security.Principal;
009:        import java.security.acl.AclEntry;
010:        import java.security.acl.LastOwnerException;
011:        import java.security.acl.NotOwnerException;
012:        import java.security.acl.Permission;
013:        import java.util.Enumeration;
014:        import java.util.Vector;
015:
016:        import org.w3c.jigsaw.auth.AuthRealm;
017:        import org.w3c.jigsaw.auth.AuthUser;
018:        import org.w3c.jigsaw.auth.AuthFilter;
019:        import org.w3c.jigsaw.auth.IPMatcher;
020:        import org.w3c.jigsaw.auth.RealmsCatalog;
021:        import org.w3c.jigsaw.http.Request;
022:        import org.w3c.jigsaw.http.httpd;
023:
024:        import org.w3c.tools.resources.FramedResource;
025:        import org.w3c.tools.resources.InvalidResourceException;
026:        import org.w3c.tools.resources.ResourceReference;
027:        import org.w3c.tools.resources.Attribute;
028:        import org.w3c.tools.resources.AttributeRegistry;
029:        import org.w3c.tools.resources.StringAttribute;
030:        import org.w3c.tools.resources.StringArrayAttribute;
031:
032:        /**
033:         * @version $Revision: 1.11 $
034:         * @author  Benoît Mahé (bmahe@w3.org)
035:         */
036:        public class AclRealm extends JAcl {
037:            /**
038:             * Attribute index - The realm name for this ACL.
039:             */
040:            protected static int ATTR_REALM = -1;
041:            /**
042:             * Attribute index - The list of allowed users.
043:             */
044:            protected static int ATTR_ALLOWED_USERS = -1;
045:            /**
046:             * Attribute index - The methods protected by the filter.
047:             */
048:            protected static int ATTR_METHODS = -1;
049:
050:            static {
051:                Attribute a = null;
052:                Class c = null;
053:                try {
054:                    c = Class.forName("org.w3c.jigsaw.acl.AclRealm");
055:                } catch (Exception ex) {
056:                    ex.printStackTrace();
057:                    System.exit(1);
058:                }
059:                // The realm name (to be resolved by the RealmFactory).
060:                a = new StringAttribute("realm", null, Attribute.EDITABLE
061:                        | Attribute.MANDATORY);
062:                ATTR_REALM = AttributeRegistry.registerAttribute(c, a);
063:                // The list of allowed users
064:                a = new StringArrayAttribute("users", null, Attribute.EDITABLE);
065:                ATTR_ALLOWED_USERS = AttributeRegistry.registerAttribute(c, a);
066:                // The protected methods
067:                a = new StringArrayAttribute("methods", null,
068:                        Attribute.EDITABLE);
069:                ATTR_METHODS = AttributeRegistry.registerAttribute(c, a);
070:            }
071:
072:            /**
073:             * The IPMatcher to match IP templates to user records.
074:             */
075:            protected IPMatcher ipmatcher = null;
076:            /**
077:             * The catalog of realms that make our scope.
078:             */
079:            protected RealmsCatalog catalog = null;
080:            /**
081:             * Our associated realm.
082:             */
083:            protected ResourceReference rr_realm = null;
084:            /**
085:             * The nam of the realm we cache in <code>realm</code>.
086:             */
087:            protected String loaded_realm = null;
088:
089:            protected Vector entries = null;
090:
091:            /**
092:             * Get the list of methods that this filter protect
093:             * @return An array of String giving the name of the protected methods,
094:             *    or <strong>null</strong>, in wich case <em>all</em> methods are
095:             *    to be protected.
096:             */
097:            public String[] getMethods() {
098:                return (String[]) getValue(ATTR_METHODS, null);
099:            }
100:
101:            /**
102:             * Get the realm of this filter.
103:             */
104:            public String getRealm() {
105:                return (String) getValue(ATTR_REALM, null);
106:            }
107:
108:            /**
109:             * Get the list of allowed users.
110:             */
111:            public String[] getAllowedUsers() {
112:                return (String[]) getValue(ATTR_ALLOWED_USERS, null);
113:            }
114:
115:            /**
116:             * Get a pointer to our realm, and initialize our ipmatcher.
117:             */
118:            protected synchronized void acquireRealm() {
119:                entries = new Vector(10);
120:                // Get our catalog:
121:                if (catalog == null) {
122:                    httpd server = (httpd) ((FramedResource) getTargetResource())
123:                            .getServer();
124:                    catalog = server.getRealmsCatalog();
125:                }
126:                // Check that our realm name is valid:
127:                String name = getRealm();
128:                if (name == null)
129:                    return;
130:                if ((rr_realm != null) && name.equals(loaded_realm))
131:                    return;
132:                // Load the realm and create the ipmtacher object
133:                rr_realm = catalog.loadRealm(name);
134:                if (rr_realm != null) {
135:                    try {
136:                        AuthRealm realm = (AuthRealm) rr_realm.lock();
137:                        Enumeration e = realm.enumerateUserNames();
138:                        while (e.hasMoreElements()) {
139:                            String uname = (String) e.nextElement();
140:                            ResourceReference rr_user = realm.loadUser(uname);
141:                            try {
142:                                AuthUser user = (AuthUser) rr_user.lock();
143:                                createEntry(user);
144:                            } catch (InvalidResourceException ex) {
145:                                System.out.println("Invalid user reference : "
146:                                        + uname);
147:                            } finally {
148:                                rr_user.unlock();
149:                            }
150:                        }
151:                    } catch (InvalidResourceException ex) {
152:
153:                    } finally {
154:                        rr_realm.unlock();
155:                    }
156:                }
157:            }
158:
159:            /**
160:             * Is this user allowed in the realm ?
161:             * @return A boolean <strong>true</strong> if access allowed.
162:             */
163:            protected boolean checkUser(AuthUser user) {
164:                String allowed_users[] = getAllowedUsers();
165:                // Check in the list of allowed users:
166:                if (allowed_users != null) {
167:                    for (int i = 0; i < allowed_users.length; i++) {
168:                        if (allowed_users[i].equals(user.getName()))
169:                            return true;
170:                    }
171:                } else {
172:                    //all users allowed
173:                    return true;
174:                }
175:                return false;
176:            }
177:
178:            protected void createEntry(AuthUser user) {
179:                if (checkUser(user))
180:                    entries.addElement(new AuthUserPrincipal(user, getName()));
181:            }
182:
183:            protected boolean hasPrincipal(Principal p) {
184:                //test with equals...
185:                int idx = entries.indexOf(p);
186:                return (idx != -1);
187:            }
188:
189:            public boolean addOwner(Principal caller, Principal owner)
190:                    throws NotOwnerException {
191:                throw new NotOwnerException();
192:            }
193:
194:            public boolean deleteOwner(Principal caller, Principal owner)
195:                    throws NotOwnerException, LastOwnerException {
196:                throw new NotOwnerException();
197:            }
198:
199:            public boolean isOwner(Principal owner) {
200:                return false;
201:            }
202:
203:            public void setName(Principal caller, String name)
204:                    throws NotOwnerException {
205:                throw new NotOwnerException();
206:            }
207:
208:            public String getName() {
209:                return getRealm();
210:            }
211:
212:            public boolean addEntry(Principal caller, AclEntry entry)
213:                    throws NotOwnerException {
214:                throw new NotOwnerException();
215:            }
216:
217:            public boolean removeEntry(Principal caller, AclEntry entry)
218:                    throws NotOwnerException {
219:                throw new NotOwnerException();
220:            }
221:
222:            public Enumeration getPermissions(Principal user) {
223:                return null;
224:            }
225:
226:            public Enumeration entries() {
227:                return null;
228:            }
229:
230:            public boolean checkPermission(Principal principal,
231:                    Permission permission) {
232:                acquireRealm();
233:                String methods[] = getMethods();
234:                boolean methodprotected = false;
235:                if (methods != null) {
236:                    for (int i = 0; i < methods.length; i++) {
237:                        if (permission.equals(methods[i]))
238:                            methodprotected = true;
239:                    }
240:                } else {
241:                    methodprotected = true;
242:                }
243:                if (!methodprotected)
244:                    return true;
245:                boolean granted = hasPrincipal(principal);
246:                if (granted) {
247:                    // let's add the username there
248:                    String username = principal.getName();
249:                    if (username != null) {
250:                        try {
251:                            HTTPPrincipal htp = (HTTPPrincipal) principal;
252:                            Request request = htp.getRequest();
253:                            if (username != null) {
254:                                request.setState(AuthFilter.STATE_AUTHUSER,
255:                                        username);
256:                            }
257:                        } catch (Exception ex) {
258:                            // was not an HTTPPrincipal
259:                        }
260:                    }
261:                }
262:                return granted;
263:            }
264:
265:            public String toString() {
266:                return getName();
267:            }
268:
269:            /**
270:             * Initialize the Acl.
271:             */
272:            public void initialize(Object values[]) {
273:                super.initialize(values);
274:            }
275:
276:        }
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