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authenticaiton/kerberos

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Bill Burke 2016-05-17 22:04:13 -04:00
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topics/authentication/kerberos.adoc
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@ -135,15 +135,15 @@ See details https://github.com/keycloak/keycloak/blob/master/misc/Testsuite.md#k
==== Credential delegation ==== Credential delegation
One scenario supported by Kerberos 5 is credential delegation. Your applications may want access to the Kerberos ticket so that Kerberos 5 supports the concept of credential delegation. In this scenario, your applications may want access to the Kerberos ticket so that
they can re-use it to interact with other services secured by Kerberos. Since the SPNEGO protocol is processed in the {{book.project.name}} server, they can re-use it to interact with other services secured by Kerberos. Since the SPNEGO protocol is processed in the {{book.project.name}} server,
you have to propagate the GSS credential to your application you have to propagate the GSS credential to your application
within an OpenID Connect token claim or a SAML assertion attribute. Each application that wants the GSS credential is going to have within the OpenID Connect token claim or a SAML assertion attribute that is transmitted to your application from the {{book.project.name}} server.
to enable the built-in protocol mapper called `gss delegation credential`. This is enabled in the `Mappers` tab of the application's To have this claim inserted into the token or assertion, each application will need to enable the built-in protocol mapper called `gss delegation credential`.
This is enabled in the `Mappers` tab of the application's
client page. See <<fake/../../clients/protocol-mappers.adoc#_protocol-mappers, Protocol Mappers>> chapter for more details. client page. See <<fake/../../clients/protocol-mappers.adoc#_protocol-mappers, Protocol Mappers>> chapter for more details.
Enabling this mapper add the GSS credential to a token claim or SAML assertion attribute. Applications will ned to deserialize the claim it receives from {{book.project.name}} before it can use it to make GSS calls against other services.
Applications will ned to deserialize it and use it for further GSS calls against other services.
We have an example, that shows this in detail. We have an example, that shows this in detail.
It's in `examples/kerberos` in the {{book.project.name}} example distribution or demo distribution download. It's in `examples/kerberos` in the {{book.project.name}} example distribution or demo distribution download.
You can also check the example sources directly https://github.com/keycloak/keycloak/blob/master/examples/kerberos[here] . You can also check the example sources directly https://github.com/keycloak/keycloak/blob/master/examples/kerberos[here] .
@ -160,14 +160,13 @@ GSSContext context = gssManager.createContext(serviceName, krb5Oid,
Note that you also need to configure `forwardable` kerberos tickets in `krb5.conf` file and add support for delegated credentials to your browser. Note that you also need to configure `forwardable` kerberos tickets in `krb5.conf` file and add support for delegated credentials to your browser.
For details, see the kerberos example from {{book.project.name}} examples set as mentioned above. For details, see the kerberos example from {{book.project.name}} examples set as mentioned above.
WARNING: Credential delegation has some security implications. WARNING: Credential delegation has some security implications so only use it if you really need it.
So enable the protocol claim and support in browser just if you really need it. It's highly recommended to use it together with HTTPS.
It's highly recommended to use it together with HTTPS. See for example http://www.microhowto.info/howto/configure_firefox_to_authenticate_using_spnego_and_kerberos.html#idp27072[this article] for more details.
See for example http://www.microhowto.info/howto/configure_firefox_to_authenticate_using_spnego_and_kerberos.html#idp27072[this article] for details.
==== Troubleshooting ==== Troubleshooting
If you have issues, we recommend to enable more logging by: If you have issues, we recommend that you enable additional logging to debug the problem:
* Enable `Debug` flag in admin console for Kerberos or LDAP federation providers * Enable `Debug` flag in admin console for Kerberos or LDAP federation providers
* Enable TRACE logging for category `org.keycloak` in logging section of `$WILDFLY_HOME/standalone/configuration/standalone.xml` to receive more info `$WILDFLY_HOME/standalone/log/server.log` * Enable TRACE logging for category `org.keycloak` in logging section of `$WILDFLY_HOME/standalone/configuration/standalone.xml` to receive more info `$WILDFLY_HOME/standalone/log/server.log`