User Operation Event Listener to keep uniqueness of claims

This User Operation Event Listener to keep uniqueness for a given set of claims (eg: email, phone number) of users on WSO2 Identity Server.

Note: This will be included OOTB in the upcoming WSO2 IS 5.12.0 release and also in the 5.10.0 & 5.11.0 version as an update (updates are available only for subscription customers of WSO2). More info on the OOTB feature can be found at this blog.

Steps to deploy the extension

• Build the component by running "mvn clean install"
• Copy following jar file which can be found in target directory into <IS_HOME>/repository/components/dropins/
  • unique-claim-user-operation-event-listener-1.0.0.jar
• Configure the User Operation Event Listener by adding following lines into deployment.toml file.

  [[event_listener]]
  id = "unique-claim-user-operation-event-listener"
  type = "org.wso2.carbon.user.core.listener.UserOperationEventListener"
  name = "org.wso2.custom.user.operation.event.listener.unique.claim.UniqueClaimUserOperationEventListener"
  order = 2
  enable = true
  properties."http://wso2.org/claims/emailaddress" = "The specified email address is already in use by a different user!"
  properties."http://wso2.org/claims/mobile" = "The specified mobile number is already in use by a different user!"
  properties."http://wso2.org/claims/username" = "The username is already in use by a different user!"
  
  

  • The last two lines of above config block defines which claims you want to make unique. You can add any number of claims in the following format.

    properties."<local-claim-uri>" = "<the message shown to the user when a duplicate is found>"
    

• Restart WSO2 IS.

Testing

• Login to management console and try to update/create two users with the same email address. You will get the error message defined in the configuration.
• Try to patch/create a user via SCIM with an email used by another user.

curl 'https://localhost:9443/scim2/Me' \
>   -X 'PATCH' \
>   -H 'Content-Type: application/json' \
>   -H 'Authorization: Bearer 71e0d4b5-3695-3edd-982a-ddd9c1905519' \
>   -d '{"Operations":[{"op":"replace","value":{"emails":["[email protected]"]}}],"schemas":["urn:ietf:params:scim:api:messages:2.0:PatchOp"]}' \
>   -k
>

{"schemas":["urn:ietf:params:scim:api:messages:2.0:Error"],"scimType":"invalidValue","detail":"The specified email address is already in use by a different user!","status":"400"}