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Web Application Server Survey

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  1. CS526, Spring 2006 Semester Project Enoch Leung Web Application Server Survey mleung/Web App Server Survey

  2. mleung/Web App Server Survey Outline of The Talk • Web Application Servers • Commons and Differences • Application level security • Web service security

  3. mleung/Web App Server Survey Web Application Servers • IBM WebSphere, BEA WebLogic, JBoss • Web Container, EJB Container • J2EE 1.4 • JAR, WAR, EAR • ClassLoader

  4. mleung/Web App Server Survey J2EE 1.4 Major Components • EJB 2.1, Servlet 2.4, JMS, JAX-RPC, JCA, JACC, JTA, JMX • EJB: Entity, Session, Message-Driven • Servlet: Servlet, Filter, JSP • JMS: ESB • JAX-RPC: WSDL, SOAP • JCA, JACC: • JMX: Management and more

  5. mleung/Web App Server Survey Offering Differences • JBoss: JMX-based, AOP • WebSphere: Cell=Cluster, Delta-deploy, Eclipse Integration (RAD), multiple registry (Tivoli), JSR-168 (Portal), Runtime profiling (Tivoli) • WebLogic: Workshop (Eclipse Integration, JSR-168, JSF), multiple registry (JAAS)

  6. mleung/Web App Server Survey J2EE Security • Authentication: identification • Authorization: permission • Servlet: BASIC, DIGEST, Form, Credential • JAAS: Subject, Principal, LoginModule, Callback; required, sufficient, requisite, optional • JACC: externalize resource access policy • JCA: JDBC3, accept Subject

  7. mleung/Web App Server Survey J2EE Security (Con't) • Role definition • JNDI -> EJB through JAAS • Servlet -> EJB through Servlet security • EJBContext.getCallerPrincipal() • EJBContext.isCallerInRole(String roleName) • WebSphere: RunAs(String roleName)

  8. public final class JBossLoginModule extends AbstractServerLoginModule { private static final String EMPTY = " "; public void initialize(Subject s, CallbackHandler c, Map t, Map o) { super.initialize(s, c, t, o); } protected Principal getIdentity() { // return new SimplePrincipal(username); System.out.println("called getIdentity()"); return new SimplePrincipal("hardcode_moron"); } protected Group[] getRoleSets() throws LoginException { System.out.println("called getRoleSets()"); // decode group by username String roleNames = "Web,BCT,Echo"; SimpleGroup roles = new SimpleGroup("Roles"); SimpleGroup callerPrincipal = new SimpleGroup("CallerPrincipal"); Group[] roleSets = {roles,callerPrincipal}; if( roleNames != null ) { StringTokenizer tokenizer = new StringTokenizer(roleNames, ","); while (tokenizer.hasMoreTokens()) { String roleName = tokenizer.nextToken(); roles.addMember(new SimplePrincipal(roleName)); } } callerPrincipal.addMember(new SimplePrincipal("hardcoded!!!")); System.out.println("caller principals = hardcoded!!!"); return roleSets; } // ... to be continued... } Code Snipplet (JBoss) mleung/Web App Server Survey

  9. { // ... continue... public boolean login() throws LoginException { if (super.login()) { // do proper name resolution here return true; } NameCallback nc = new NameCallback(EMPTY,EMPTY); PasswordCallback pc = new PasswordCallback(EMPTY,false); Callback[] callbacks = {nc, pc}; try { callbackHandler.handle(callbacks); String username = nc.getName(); char[] password = pc.getPassword(); // get username & password okay, now what? NtlmPasswordAuthentication ntpa = new NtlmPasswordAuthentication("BCTHK01","el0686","********"); UniAddress addr = new UniAddress(NbtAddress.getByName("BCTHK01")); SmbSession.logon(addr,ntpa); System.out.println("NTLM login success"); return true; } catch (Exception e) { // do nothing } return false; } } Code Snipplet (Con't) mleung/Web App Server Survey

  10. mleung/Web App Server Survey J2EE Security Concerns • RMI / JNDI • ServletContext -> EJBContext • JAAS vs. JACC, aka. Subject vs. Policy • ClientContainer: RMI-IIOP, vendor lock-in • WebSphere: WSSPI • WebSphere: 30% performance penalty

  11. mleung/Web App Server Survey Web Services (SOAP) • J2EE: SAAJ (SOAP) • SOAPEnvelop, SOAPBody, SOAPFault • WebSphere: map servlets to web services • Security: HTTPS + Servlet A&A

  12. mleung/Web App Server Survey XML / WS Security • Secure transport, correct identity, integrity • Canonicalized, Portion-Tree • Referenced, Sibling, Embedded, Child (embedded key) • WS-Security: SOAP Headers, wsse (actor={receiver}, mustUnderstand=”1”)

  13. mleung/Web App Server Survey JMS • Message-oriented middle-ware (MOM) bridge (e.g. MQSeries) • Queue (point-to-point) • Topic (publish / subscribe) • Delivery confirmation • Security: NONE (or proprietary) • Solution: protected JNDI discovery, embed Principal with message etc.

  14. mleung/Web App Server Survey Enterprise Service Bus • Service-oriented Architecture (SOA) • MOM + WS + XSLT / XSD + Content-based routing • WS -> SOAP + UDDI (some have ebXML) • MOM -> JMS • Usage: enterprise systems integration

  15. mleung/Web App Server Survey End of Session • Question?

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