Token type overview
The proposed Web services security draft defined two types of security tokens:
- Username token
- Binary security token
A user name token consists of a user name and, optionally, password information. You can include a user name token directly in the <Security> header within the message. Binary tokens, such as X.509 certificates, Kerberos tickets, LTPA tokens, or other non-XML formats, require a special encoding for inclusion. The Web services security specification describes how to encode binary security tokens such as X.509 certificates and Kerberos tickets, and it also describes how to include opaque encrypted keys. The specification also includes extensibility mechanisms that you can use to further describe the characteristics of the credentials that are included with a message.
WebSphere Application Server, V5.0.2 supports user name tokens, which include both user name and password for basic authentication and user name, which is used for identity assertion. The WebSphere Application Server, V5.0.2 binary security token implementation supports both X.509 certificates and LTPA binary security. You extend the implementation to generate other types of tokens. However, Kerberos tickets are not supported in WebSphere Application Server, V5.0.2. Each type of token is processed by a corresponding token generation and validation module. The binary token generation and validation modules are pluggable that is based on the Java Authentication and Authorization Service (JAAS) framework. For example, an arbitrary XML-based token format is supported using the JAAS pluggable framework. WebSphere Application Server, V5.0.2 does not support an XML-based token that is used in the SecurityTokenReference.
You can define the types of tokens that the message can accept in the deployment descriptor extension file, ibm.webservices-ext.xmi. A message receiver might support one or more types of security tokens. The following example shows that the receiver supports four types of security tokens: Important: In the following code sample, several lines were split into multiple lines due to the width of the printed page. See the close bracket for an indication of where each line of code ends.?xml version="1.0" encoding="UTF-8"?> <com.ibm.etools.webservice.wsext:WsExtension xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:com.ibm.etools.webservice.wsext= "http://www.ibm.com/websphere/appserver/schemas/5.0.2/wsext.xmi" xmi:id="WsExtension_1052760331306" routerModuleName="StockQuote.war"> <wsDescExt xmi:id="WsDescExt_1052760331306" wsDescNameLink="StockQuoteFetcher"> <pcBinding xmi:id="PcBinding_1052760331326" pcNameLink="urn:xmltoday-delayed-quotes" scope="Session"> <serverServiceConfig xmi:id="ServerServiceConfig_1052760331326"actorURI="myActorURI"> <securityRequestReceiverServiceConfig xmi:id="SecurityRequestReceiverServiceConfig_1052760331326"> <loginConfig xmi:id="LoginConfig_1052760331326"> <authMethods xmi:id="AuthMethod_1052760331326" text="BasicAuth"/> <authMethods xmi:id="AuthMethod_1052760331327" text="IDAssertion"/> <authMethods xmi:id="AuthMethod_1052760331336" text="Signature"/> <authMethods xmi:id="AuthMethod_1052760331337" text="LTPA"/> </loginConfig> <idAssertion xmi:id="IDAssertion_1052760331336" idType="Username" trustMode="Signature"/>
The message sender might choose one of the token types that are supported by the receiver when sending a message. You can define the type of token to be used by the sending side in the client descriptor extension file, ibm-webservicesclient-ext.xmi. The following example shows that the sender chooses to send a UsernameToken to the receiver: Important: In the following code sample, several lines were split into multiple lines due to the width of the printed page. See the close bracket for an indication of where each line of code ends.<?xml version="1.0" encoding="UTF-8"?> <com.ibm.etools.webservice.wscext:WsClientExtension xmi:version="2.0" mlns:xmi="http://www.omg.org/XMI" xmlns:com.ibm.etools.webservice.wscext= "http://www.ibm.com/websphere/appserver/schemas/5.0.2/wscext.xmi" xmi:id="WsClientExtension_1052760331496"> <ServiceRefs xmi:id="ServiceRef_1052760331506" serviceRefLink="service/StockQuoteService"> <portQnameBindings xmi:id="PortQnameBinding_1052760331506" portQnameLocalNameLink="StockQuote"> <clientServiceConfig xmi:id="ClientServiceConfig_1052760331506" actorURI="myActorURI"> <securityRequestSenderServiceConfig xmi:id="SecurityRequestSenderServiceConfig_1052760331506" actor="myActorURI"> <loginConfig xmi:id="LoginConfig_1052760331506" authMethod="BasicAuth"/>
Username token element
Binary security token
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IBM is a trademark of the IBM Corporation in the United States, other countries, or both.