--- /dev/null
+// GenericAuthFilter.java\r
+// $Id: GenericAuthFilter.java,v 1.2 2010/06/15 17:53:03 smhuang Exp $\r
+// (c) COPYRIGHT MIT and INRIA, 1996.\r
+// Please first read the full copyright statement in file COPYRIGHT.html\r
+\r
+package org.w3c.jigsaw.auth;\r
+\r
+import java.io.PrintStream;\r
+\r
+import java.util.Enumeration;\r
+\r
+import java.net.InetAddress;\r
+\r
+import org.w3c.tools.resources.Attribute;\r
+import org.w3c.tools.resources.AttributeHolder;\r
+import org.w3c.tools.resources.AttributeRegistry;\r
+import org.w3c.tools.resources.FramedResource;\r
+import org.w3c.tools.resources.InvalidResourceException;\r
+import org.w3c.tools.resources.ProtocolException;\r
+import org.w3c.tools.resources.Resource;\r
+import org.w3c.tools.resources.ResourceFilter;\r
+import org.w3c.tools.resources.ResourceFrame;\r
+import org.w3c.tools.resources.ResourceReference;\r
+import org.w3c.tools.resources.StringArrayAttribute;\r
+\r
+import org.w3c.jigsaw.http.Client;\r
+import org.w3c.jigsaw.http.HTTPException;\r
+import org.w3c.jigsaw.http.Reply;\r
+import org.w3c.jigsaw.http.Request;\r
+import org.w3c.jigsaw.http.httpd;\r
+\r
+import org.w3c.jigsaw.html.HtmlGenerator;\r
+\r
+import org.w3c.tools.codec.Base64Decoder;\r
+import org.w3c.tools.codec.Base64FormatException;\r
+\r
+import org.w3c.www.http.HTTP;\r
+import org.w3c.www.http.HttpChallenge;\r
+import org.w3c.www.http.HttpCredential;\r
+import org.w3c.www.http.HttpFactory;\r
+import org.w3c.www.http.HttpReplyMessage;\r
+import org.w3c.www.http.HttpRequestMessage;\r
+\r
+import org.w3c.tools.resources.ProtocolException;\r
+\r
+/**\r
+ * A generic authentication filter.\r
+ * This filter will use both IP and basic authentication to try to authenticate\r
+ * incomming request. It should not be use for big user's database (typically\r
+ * the ones that have more than 1000 entries).\r
+ */\r
+\r
+class BasicAuthContextException extends Exception {\r
+\r
+ BasicAuthContextException (String msg) {\r
+ super (msg) ;\r
+ }\r
+}\r
+\r
+class BasicAuthContext {\r
+ String user = null ;\r
+ String password = null ;\r
+ String cookie = null ;\r
+\r
+ public String toString() {\r
+ return user+":"+password;\r
+ }\r
+\r
+ BasicAuthContext (Request request) \r
+ throws BasicAuthContextException, ProtocolException\r
+ {\r
+ HttpCredential credential = null;\r
+\r
+ credential = (request.isProxy()\r
+ ? request.getProxyAuthorization()\r
+ : request.getAuthorization());\r
+ if ( ! credential.getScheme().equalsIgnoreCase("Basic") ) {\r
+ String msg = ("Invalid authentication scheme \""\r
+ + credential.getScheme()\r
+ + " expecting \"Basic\"");\r
+ throw new BasicAuthContextException (msg) ;\r
+ }\r
+ // Decode the credentials:\r
+ String decoded = null ;\r
+ this.cookie = credential.getAuthParameter("cookie");\r
+ try {\r
+ Base64Decoder b = new Base64Decoder (cookie) ;\r
+ decoded = b.processString() ;\r
+ } catch (Base64FormatException e) {\r
+ String msg = "Invalid BASE64 encoding of credentials." ;\r
+ throw new BasicAuthContextException (msg) ;\r
+ }\r
+ // Get user and password:\r
+ int icolon = decoded.indexOf (':') ;\r
+ if ( (icolon > 0) && (icolon+1 < decoded.length()) ) {\r
+ // ok, parse was find, check user:\r
+ this.user = decoded.substring (0, icolon) ;\r
+ this.password = decoded.substring (icolon+1) ;\r
+ } else {\r
+ String msg = "Invalid credentials syntax in " + decoded ;\r
+ throw new BasicAuthContextException (msg) ;\r
+ }\r
+ }\r
+}\r
+\r
+/**\r
+ * GenericAuthFilter provides for both IP and basic authentication.\r
+ * This is really a first implementation. It looses on several points:\r
+ * <ul>\r
+ * <li>AuthUser instances, being a subclass of resource dump their classes\r
+ * along with their attributes, although here we know that they will all\r
+ * be instances of AuthUser.\r
+ * <li>The way the ipmatcher is maintained doesn't make much sense.\r
+ * <li>The way groups are handled is no good.\r
+ * <li>The SimpleResourceStore is not an adequat store for the user database,\r
+ * it should rather use the jdbmResourceStore (not written yet).\r
+ * </ul>\r
+ * However, this provides for the basic functionnalities.\r
+ */\r
+\r
+public class GenericAuthFilter extends AuthFilter {\r
+ /**\r
+ * Attribute index - The list of allowed users.\r
+ */\r
+ protected static int ATTR_ALLOWED_USERS = -1 ;\r
+ /**\r
+ * Attribute index - The list of allowed groups.\r
+ */\r
+ protected static int ATTR_ALLOWED_GROUPS = -1 ;\r
+\r
+ static {\r
+ Attribute a = null ;\r
+ Class c = null ;\r
+ try {\r
+ c = Class.forName("org.w3c.jigsaw.auth.GenericAuthFilter");\r
+ //Added by Jeff Huang\r
+ //TODO: FIXIT\r
+ } catch (Exception ex) {\r
+ ex.printStackTrace() ;\r
+ System.exit(1) ;\r
+ }\r
+ // The list of allowed users\r
+ a = new StringArrayAttribute("users"\r
+ , null\r
+ , Attribute.EDITABLE) ;\r
+ ATTR_ALLOWED_USERS = AttributeRegistry.registerAttribute(c, a) ;\r
+ // The list of allowed groups:\r
+ a = new StringArrayAttribute("groups"\r
+ , null\r
+ , Attribute.EDITABLE);\r
+ ATTR_ALLOWED_GROUPS = AttributeRegistry.registerAttribute(c, a) ;\r
+ }\r
+\r
+ /**\r
+ * The IPMatcher to match IP templates to user records.\r
+ */\r
+ protected IPMatcher ipmatcher = null ;\r
+ /**\r
+ * The catalog of realms that make our scope.\r
+ */\r
+ protected RealmsCatalog catalog = null ;\r
+ /**\r
+ * Our associated realm.\r
+ */\r
+ protected ResourceReference rr_realm = null ;\r
+ /**\r
+ * The nam of the realm we cache in <code>realm</code>.\r
+ */\r
+ protected String loaded_realm = null ;\r
+\r
+ /**\r
+ * The challenge to issue to any client for Basic Authentication.\r
+ */\r
+ protected HttpChallenge challenge = null;\r
+\r
+ /**\r
+ * Get a pointer to our realm, and initialize our ipmatcher.\r
+ */\r
+\r
+ protected synchronized void acquireRealm() {\r
+ // Get our catalog:\r
+ if ( catalog == null ) {\r
+ httpd server = (httpd) \r
+ ((FramedResource) getTargetResource()).getServer() ;\r
+ catalog = server.getRealmsCatalog() ;\r
+ }\r
+ // Check that our realm name is valid:\r
+ String name = getRealm() ;\r
+ if ( name == null )\r
+ return ;\r
+ if ((rr_realm != null) && name.equals(loaded_realm)) \r
+ return ;\r
+ // Load the realm and create the ipmtacher object\r
+ rr_realm = catalog.loadRealm(name) ;\r
+ if (rr_realm != null) {\r
+ try {\r
+ AuthRealm realm = (AuthRealm) rr_realm.lock();\r
+ Enumeration e = realm.enumerateUserNames() ;\r
+ if (e.hasMoreElements()) {\r
+ ipmatcher = new IPMatcher() ;\r
+ }\r
+ while (e.hasMoreElements()) {\r
+ String uname = (String) e.nextElement() ;\r
+ ResourceReference rr_user = realm.loadUser(uname) ;\r
+ try {\r
+ AuthUser user = (AuthUser) rr_user.lock();\r
+ short ips[][] = user.getIPTemplates() ;\r
+ if ( ips != null ) {\r
+ for (int i = 0 ; i < ips.length ; i++) \r
+ ipmatcher.add(ips[i], rr_user) ;\r
+ }\r
+ } catch (InvalidResourceException ex) {\r
+ System.out.println("Invalid user reference : "+uname);\r
+ } finally {\r
+ rr_user.unlock();\r
+ }\r
+ }\r
+ } catch (InvalidResourceException ex) {\r
+\r
+ } finally {\r
+ rr_realm.unlock();\r
+ }\r
+ }\r
+ }\r
+\r
+ /**\r
+ * Check that our realm does exist.\r
+ * Otherwise we are probably being initialized, and we don't authenticate\r
+ * yet.\r
+ * @return A boolean <strong>true</strong> if realm can be initialized.\r
+ */\r
+\r
+ protected synchronized boolean checkRealm() {\r
+ acquireRealm() ;\r
+ return (ipmatcher != null) ;\r
+ }\r
+\r
+ /**\r
+ * Get the list of allowed users.\r
+ */\r
+\r
+ public String[] getAllowedUsers() {\r
+ return (String[]) getValue(ATTR_ALLOWED_USERS, null) ;\r
+ }\r
+\r
+ /**\r
+ * Get the list of allowed groups.\r
+ */\r
+\r
+ public String[] getAllowedGroups() {\r
+ return (String[]) getValue(ATTR_ALLOWED_GROUPS, null) ;\r
+ }\r
+\r
+ /**\r
+ * Lookup a user by its IP address.\r
+ * @param ipaddr The IP address to look for.\r
+ * @return An AuthUser instance or <strong>null</strong>.\r
+ */\r
+\r
+ public synchronized ResourceReference lookupUser (InetAddress ipaddr) {\r
+ if ( ipmatcher == null )\r
+ acquireRealm() ;\r
+ return (ResourceReference) ipmatcher.lookup(ipaddr.getAddress()) ;\r
+ }\r
+\r
+ /**\r
+ * Lookup a user by its name.\r
+ * @param name The user's name.\r
+ * @return An AuthUser instance, or <strong>null</strong>.\r
+ */\r
+\r
+ public synchronized ResourceReference lookupUser (String name) {\r
+ if ( rr_realm == null )\r
+ acquireRealm() ;\r
+ try {\r
+ AuthRealm realm = (AuthRealm) rr_realm.lock();\r
+ return realm.loadUser(name) ;\r
+ } catch (InvalidResourceException ex) {\r
+ return null;\r
+ } finally {\r
+ rr_realm.unlock();\r
+ }\r
+ }\r
+\r
+ /**\r
+ * Check the given Basic context against our database.\r
+ * @param ctxt The basic auth context to check.\r
+ * @return A AuthUser instance if check succeeded, <strong>null</strong>\r
+ * otherwise.\r
+ */\r
+\r
+ protected ResourceReference checkBasicAuth(BasicAuthContext ctxt) {\r
+ ResourceReference rr_user = (ResourceReference)lookupUser(ctxt.user) ;\r
+ if (rr_user != null) {\r
+ try {\r
+ AuthUser user = (AuthUser) rr_user.lock();\r
+ // This user doesn't even exists !\r
+ if ( user == null )\r
+ return null ;\r
+ // If it has a password check it\r
+ if ( ! user.definesAttribute("password") ) {\r
+ return rr_user;\r
+ } else {\r
+ return user.getPassword().equals(ctxt.password) \r
+ ? rr_user \r
+ : null ;\r
+ }\r
+ } catch (InvalidResourceException ex) {\r
+ return null;\r
+ } finally {\r
+ rr_user.unlock();\r
+ }\r
+ }\r
+ return null;\r
+ }\r
+\r
+ /**\r
+ * Is this user allowed in the realm ?\r
+ * First check in the list of allowed users (if any), than in the list\r
+ * of allowed groups (if any). If no allowed users or allowed groups\r
+ * are defined, than simply check for the existence of this user.\r
+ * @return A boolean <strong>true</strong> if access allowed.\r
+ */\r
+\r
+ protected boolean checkUser(AuthUser user) {\r
+ String allowed_users[] = getAllowedUsers() ;\r
+ // Check in the list of allowed users:\r
+ if ( allowed_users != null ) {\r
+ for (int i = 0 ; i < allowed_users.length ; i++) {\r
+ if (allowed_users[i].equals(user.getName()))\r
+ return true ;\r
+ }\r
+ }\r
+ // Check in the list of allowed groups:\r
+ String allowed_groups[] = getAllowedGroups() ;\r
+ if ( allowed_groups != null ) {\r
+ String ugroups[] = user.getGroups() ;\r
+ if ( ugroups != null ) {\r
+ for (int i = 0 ; i < ugroups.length ; i++) {\r
+ for (int j = 0 ; j < allowed_groups.length ; j++) {\r
+ if ( allowed_groups[j].equals(ugroups[i]) ) \r
+ return true ;\r
+ }\r
+ }\r
+ }\r
+ }\r
+ // If no users or groups specified, return true\r
+ if ((allowed_users == null) && (allowed_groups == null)) \r
+ return true ;\r
+ return false ;\r
+ }\r
+\r
+ /**\r
+ * Catch set value on the realm, to maintain cached values.\r
+ */\r
+\r
+ public void setValue(int idx, Object value) {\r
+ super.setValue(idx, value);\r
+ if ( idx == ATTR_REALM ) {\r
+ // Initialize the filter challenge:\r
+ challenge = HttpFactory.makeChallenge("Basic");\r
+ challenge.setAuthParameter("realm", getRealm());\r
+ }\r
+ }\r
+\r
+ /**\r
+ * Authenticate the given request.\r
+ * We first check for valid authentication information. If no \r
+ * authentication is provided, than we try to map the IP address to some\r
+ * of the ones we know about. If the IP address is not found, we challenge\r
+ * the client for a password.\r
+ * <p>If the IP address is found, than either our user entry requires an\r
+ * extra password step (in wich case we challenge it), or simple IP\r
+ * based authentication is enough, so we allow the request.\r
+ * @param request The request to be authentified.\r
+ * @exception org.w3c.tools.resources.ProtocolException if authentication\r
+ * failed\r
+ */\r
+\r
+ public void authenticate (Request request) \r
+ throws ProtocolException \r
+ {\r
+ // Are we being edited ?\r
+ if ( ! checkRealm() )\r
+ return ;\r
+ // Internal requests always allowed:\r
+ Client client = request.getClient() ;\r
+ if ( client == null )\r
+ return ;\r
+ // Check for User by IP address:\r
+ boolean ipchecked = false ;\r
+ ResourceReference rr_user = lookupUser(client.getInetAddress());\r
+ if (rr_user != null) {\r
+ try {\r
+ AuthUser user = (AuthUser) rr_user.lock();\r
+ if ( user != null ) {\r
+ ipchecked = true ;\r
+ // Good the user exists, does it need more authentication ?\r
+ if ( ! user.definesAttribute("password") &&\r
+ checkUser(user)) {\r
+ request.setState(STATE_AUTHUSER, user.getName()) ;\r
+ request.setState(STATE_AUTHTYPE, "ip");\r
+ return ;\r
+ }\r
+ }\r
+ } catch (InvalidResourceException ex) {\r
+ //FIXME\r
+ } finally {\r
+ rr_user.unlock();\r
+ }\r
+ }\r
+ // Check authentication according to auth method:\r
+ if ((request.hasAuthorization() && ! request.isProxy())\r
+ || (request.isProxy() && request.hasProxyAuthorization())) {\r
+ BasicAuthContext ctxt = null ;\r
+ try {\r
+ ctxt = new BasicAuthContext(request);\r
+ } catch (BasicAuthContextException ex) {\r
+ ctxt = null;\r
+ }\r
+ // Is that user allowed ?\r
+ if ( ctxt != null ) {\r
+ rr_user = checkBasicAuth(ctxt) ;\r
+ if (rr_user != null) {\r
+ try {\r
+ AuthUser user = (AuthUser) rr_user.lock();\r
+ if ((user != null) && checkUser(user)) {\r
+ // Check that if IP auth was required,\r
+ // it succeeded:\r
+ boolean iprequired = \r
+ user.definesAttribute("ipaddress") ;\r
+ if ( ( ! iprequired) || ipchecked ) {\r
+ // Set the request fields, and continue:\r
+ request.setState(STATE_AUTHUSER, ctxt.user);\r
+ request.setState(STATE_AUTHTYPE, "Basic") ;\r
+ return ;\r
+ }\r
+ }\r
+ } catch (InvalidResourceException ex) {\r
+ //FIXME\r
+ } finally {\r
+ rr_user.unlock();\r
+ }\r
+ } \r
+ }\r
+ }\r
+ \r
+ // Every possible scheme has failed for this request, emit an error\r
+ Reply e = null;\r
+ if ( request.isProxy() ) {\r
+ e = request.makeReply(HTTP.PROXY_AUTH_REQUIRED);\r
+ e.setProxyAuthenticate(challenge);\r
+ } else {\r
+ e = request.makeReply(HTTP.UNAUTHORIZED);\r
+ e.setWWWAuthenticate (challenge);\r
+ }\r
+ HtmlGenerator g = new HtmlGenerator("Unauthorized");\r
+ g.append ("<h1>Unauthorized access</h1>"\r
+ + "<p>You are denied access to this resource.");\r
+ e.setStream(g);\r
+ throw new HTTPException (e);\r
+ }\r
+\r
+ /**\r
+ * Initialize the filter.\r
+ */\r
+\r
+ public void initialize(Object values[]) {\r
+ super.initialize(values) ;\r
+ if ( getRealm() != null ) {\r
+ // Initialize the filter challenge:\r
+ challenge = HttpFactory.makeChallenge("Basic");\r
+ challenge.setAuthParameter("realm", getRealm());\r
+ }\r
+ }\r
+\r
+}\r
projects / Benchmarks_CSolver.git / blobdiff