authorizationGrantType cannot be null in Spring Security 5 OAuth Client and Spring Boot 2.0

Question

I followed the Spring Security 5.0 official reference documentation and sample codes oauth2login to setup OAuth2/OIDC authentication in my project, but it failed and I got t

Answer 1

redirect-uri-template -> redirect-uri it works SpringBoot 2.2.0.RELEASE

but it works spring 2.1.x with redirect-uri-template

Answer 2

use redirect-uri instead of redirect-uri-template if use SpringBoot v2.2.1 RELEASE

Answer 3

To elaborate on OP's update above, the properties you need to include in your application.yaml to resolve the original error are as shown below, in this case for Azure AD (note this ONLY works with Spring Security 5, NOT Spring Security OAuth2 2.x whose functionality is being merged directly into Spring Security 5):

spring:
  security:
    oauth2:
      client:
        registration:
          microsoft:
            client-id: a935ba7b-6aa4-4b0c-9e84-04f9acaa477b
            client-secret: redacted
            authorization-grant-type: authorization_code
            redirect-uri-template: '{baseUrl}/login/oauth2/code/{registrationId}'
            scope: User.Read
            client-name: Microsoft
            client-alias: microsoft
        provider:
          microsoft:
            authorization-uri: https://login.microsoftonline.com/common/oauth2/authorize?resource=https://graph.microsoft.com/
            token-uri: https://login.microsoftonline.com/common/oauth2/token
            user-info-uri: https://graph.microsoft.com/v1.0/me
            user-name-attribute: sub
            jwk-set-uri: https://login.microsoftonline.com/common/discovery/keys