In SCIM2 Filtering the attribute names and attribute operators used in filters should be case insensitive

[DMHP]

Request :curl -v -k --user admin:admin https://localhost:9443/scim2/Users?filter=EMAILS.home+EQ+hasanthi@gmail.com

Response :{"schemas":["urn:ietf:params:scim:api:messages:2.0:Error"],"scimType":"invalidValue","detail":"Not a valid attribute name/uri","status":"400"}

Request :
curl -v -k --user admin:admin https://localhost:9443/scim2/Users?filter=emails.home+EQ+hasanthi@gmail.com

Response :{"totalResults":1,"startIndex":1,"itemsPerPage":1,"schemas":["urn:ietf:params:scim:api:messages:2.0:ListResponse"],"Resources":[{"emails":[{"type":"work","value":"hasanthi@wso2.com"},{"type":"home","value":"hasanthi@gmail.com"}],"meta":{"created":"2019-04-25T10:14:12.028Z","location":"https://localhost:9443/scim2/Users/a3b249d0-573b-4e96-b2cd-09bcbbe539c4","lastModified":"2019-04-25T11:22:03.278Z","resourceType":"User"},"name":{"givenName":"hasanthi","familyName":"Purnima"},"id":"a3b249d0-573b-4e96-b2cd-09bcbbe539c4","userName":"hasanthi"}]}

Quoted from the spec

"Attribute names and attribute operators used in filters are case
insensitive. For example, the following two expressions will
evaluate to the same logical value:

filter=userName Eq "john"

filter=Username eq "john""

So it should support to use attribute names in an case insensitive manner using wso2 IS

[JayaShakthi97]

• Related issue: SCIM filter operators (AND, OR, NOT) are case-sensitive #20511