[keycloak-user] Multivalued user attributes mapping

Sascha Skorupa sascha.skorupa at traveltainment.de
Thu Oct 22 10:46:35 EDT 2015


if this is currently not possible what does the "Multivalued" flag mean in the mappers section of a client?

Is there any example / documentation how to implement and integrate custom protocol mappers?


Von: Marek Posolda [mailto:mposolda at redhat.com]
Gesendet: Montag, 21. September 2015 14:32
An: Sascha Skorupa <sascha.skorupa at traveltainment.de>; keycloak-user at lists.jboss.org
Betreff: Re: [keycloak-user] Multivalued user attributes mapping

On 21/09/15 11:52, Sascha Skorupa wrote:

we are currently evaluating Keycloak as IDM solution for our company. In doing so we encountered the following questions according to storing authorization data:

1)      In the "Mapper" section it is possible to configure how user attributes are mapped to tokens/claims.  It is also possible to turn on "Multivalued" mapping, so that every value of one attribute is set as claim. But, how you can configure multiple values for one attribute? If you save another value with the same key the existing one is overwritten.
You mean to map multiple different attributes from User into one attribute of AccessToken? That's not possible with the existing mappers . The thing is that you can write your own protocol mapper implementation and map the claims exactly how you want.

2)      One of requirements is to persist custom authorization data hierarchically and to map this data into access tokens. Is there any recommendation how to realize this in keycloak or is the only way to use flat user attributes (key/value).
The accessToken has "otherClaims" map on it. You can use any hierarchy you want to map your stuff into the access token. The best is again to write your own protocol mapper to achieve exactly what you want.


Thanks, Sascha


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