IBM WAS provides Kerberos token support for Web services message-level security. The support is based on the Organization for the Advancement of Structured Information Standards (OASIS) WS-Security Kerberos Token Profile V1.1. Use this topic to understand the Kerberos support that is available for Web services.
Kerberos token profile version 1.1
Kerberos Version 5 is a mature, open standard that provides a secure third-party authentication mechanism. The OASIS Web Services SOAP Message Security specification references the Kerberos token in the SOAP message. Web services applications can use the Kerberos token to send identities and protect messages more securely. Overall, Kerberos support involves Kerberos support in Java EE security and the Kerberos token support in WS-Security. This page covers the Kerberos token support in WS-Security only.
In WAS V7.0, WS-Security introduces support for the Kerberos token, which is based on OASIS WS-Security Kerberos Token Profile V1.1 specification. The Kerberos token is a binary security token for Web services message-level security. WS-Security provides SOAP message-level security, such as security token propagation, message signature, and message encryption. The Kerberos token is used for message security, specifically with the SOAP message security spec for Web services, and is another supported token, such as the username token and the secure conversation token.
See the WS-Security Kerberos Token Profile V1.1 specification. The specification explains how to use Kerberos security with the WS-Security and how the Kerberos token is propagated and used to secure the SOAP message through signing and encryption.
Kerberos token profile enablement
The WAS configuration model leverages existing tools and frameworks for the Kerberos token profile configuration of authentication and message protection, such as:
- Policy set and binding configuration to enable the Kerberos token profile for JAX-WS applications
- Deployment descriptor and binding configuration to enable the Kerberos token profile for JAX-RPC applications
- Token profile enablement with a Kerberos token for JAX-WS applications
- Minimal client configuration to enable the Kerberos token profile using the JAX-WS model
For JAX-WS client applications, the design updates the APIs for WS-Security and enforces a WS-Security policy with a Kerberos token, which is based on the OASIS token profile. To enable a Kerberos token profile by using a policy set, first establish the WS-Security policy and binding files by using a custom token.
See the "Kerberos configuration models for Web services" topic.
The following Kerberos-related function is supported by Web services in WAS:
- Client models for JAX-WS applications with Web services security APIs
- Interoperability with Web Services Enhancements (WSE) V 3.5 and Windows Communication Foundation (WCF) V3.5 for Microsoft .NET
- Recovery of Web services message security tokens for JAX-WS applications
- Kerberos token profile enablement
- Integration with the base security for the appserver
- Kerberos token generation for the client and service
- Kerberos consumption at the service
- Clustering and high-availability for JAX-WS applications
- Kerberos token profile configuration of authentication and message protection for JAX-WS applications
- Integration in a single realm with either a Microsoft or z/OS operating system Key Distribution Center (KDC).
- Kerberos token profile configuration of authentication for JAX-RPC applications
The appserver does not support the following function:
- Key name references
- Message protection using session keys for JAX-RPC applications
- Message protection using derived keys for JAX-RPC applications
- Generation of SHA1 keys for JAX-RPC applications
- Kerberos delegation is not supported when we are using JAX-RPC applications configured with the Kerberos authentication security mechanism
- A Kerberos token is not recoverable when JAX-WS applications are enabled with Web services Reliable Messaging
Kerberos message protection for Web services
Kerberos usage overview for Web services
Kerberos configuration models for Web services
WS-Security Kerberos token for authentication in a single or cross Kerberos realm environment
Kerberos clustering for Web services
WS-Security provides message integrity, confidentiality, and authentication
Set the Kerberos token for WS-Security
Kerberos Token Profile V 1.1 specification
Kerberos Token Profile 1.1 Approved Errata