Invalid scope error when trying to consume destination using OAuth2SAMLBearerAssertion status 500

[mrbass]

Hello guys,

I’m really stuck on how to consume destination from inside my SAPUI5 frontEnd. using the OAuth2SAMLBearerAssertion type of authentication, technically I want to make a SSO connection with SAP ByD, So I configured the SSO inside ByD

and I’ve tested the connection between the SSO and the identity Provider and it was successful that means my SSO config is Ok,
Now I’ve set up my destination on the subaccount level like this and when I click on check connection I get the redirect message, that means my subaccount is trusted in the Idp and recognized by SAP ByD :I have no problem consuming the destination when I use BasicAuthentication type of connection, the issue only happens when switching to OAuth2SAMLBearerAssertion

Now here when I’m really stuck In my xs-app.json of my SAPUI5 module I’ve tried both

In my xs-app.json of my SAPUI5 module I’ve tried both

{
	"welcomeFile": "/appadmin/index.html",
	"authenticationMethod": "route",
	"logout": {
		"logoutEndpoint": "/do/logout"
	},
	"routes": [{
		"source": "^/ByD",
		"target": "/sap/byd/odata/cust/v1/odata_project/",
		"authenticationType": "xsuaa",
		"destination": "ByD",
		"csrfProtection": false
	}
	 ]
}

and

{
		"source": "^/ByD/(.*)$",
		"target": "$1",
		"authenticationType": "none",
		"destination": "ByD",
		"csrfProtection": false
	}

and

{
		"source": "^/ByD/(.*)$",
		"target": "$1",
		"authenticationType": "xsuaa",
		"destination": "ByD",
		"csrfProtection": false
	}

Without success
my mta.yml looks like this

ID: MPRSMTA
_schema-version: '2.1'
version: 0.0.1
modules:
  - name: appadmin
    type: html5
    path: appadmin
    parameters:
      memory: 256M
      disk-quota: 250M
    build-parameters:
      builder: grunt
    properties:
      TENANT_HOST_PATTERN: '^projexia--inc--(.*)-spaceprojexia-appadmin.cfapps.(.*).hana.ondemand.com'
      SAP_JWT_TRUST_ACL: '[{"clientid":"*", "identityzone": "*"}]'
    requires:
      - name: uaa_MPRSMTA
      - name: destination-MPRS-lite
description: MPRS MTA
provider: Projexia
resources:
  - name: uaa_MPRSMTA
    parameters:
      path: ./xs-security.json
      service-plan: application
      service: xsuaa
    type: org.cloudfoundry.managed-service
  - name: destination-MPRS-lite
    parameters:
      service-plan: lite
      service: destination
    type: org.cloudfoundry.managed-service

and my xs-secutity .json is like that :

{
	"xsappname": "MPRSMTA",
	"tenant-mode": "shared",
	"description": "Security profile of called application",
	"scopes": [{
		"name": "$XSAPPNAME.USER",
		"description": "MPRS User"
	}, {
		"name": "$XSAPPNAME.Callback",
		"description": "With this scope set, the callbacks for subscribe, unsubscribe and getDependencies can be called.",
		"grant-as-authority-to-apps": [
			"$XSAPPNAME(application,sap-provisioning,tenant-onboarding)"
		]
	}, {
		"name": "uaa.user",
		"description": "UAA"
	}, {
		"name": "openid",
		"description": "openid"
	}, {
		"name": "scim.read",
		"description": "scim.read"
	}, {
		"name": "scim.read",
		"description": "scim.read"
	}],
	"role-templates": [{
		"name": "MPRS_User",
		"scope-references": ["$XSAPPNAME.USER"]
	}, {
		"name": "Token_Exchange",
		"description": "UAA",
		"scope-references": [
			"uaa.user"
		]
	}]
}

Am I missing a scope of a role template or something like that ?

Using the command cf logs myapp --- recent

I'm having this error message :

"GET request to /ByD/ completed with status 500 - The requested scope is invalid. Make sure that the scope(s) you requested in parameter scope actually exist in the system."}

P.S : When I use BasicAuth with the following source/target I was able to consume the destination without issue, but not when I switch to OAuth2SAMLBearerAssertion

{<br>                "source": "^/ByD/(.*)$",
		"target": "$1",
		"authenticationType": "xsuaa",
		"destination": "ByD",
		"csrfProtection": false
	}		<br> 

[mrbass · Accepted solution]

I finally found the issue, I wrote the scope as Scope and it must not be in capital letter, now I'm able to consume the destination without any problem