Identity_Providers_Oauth2AuthenticationMethod
The Providers.Oauth2AuthenticationMethod structure contains the possible types of OAuth2 authentication methods.
CLIENT_SECRET_BASIC : Clients that have received a client_secret value from the Authorization Server, authenticate with the Authorization Server in accordance with Section 3.2.1 of OAuth 2.0 [RFC6749] using the HTTP Basic authentication scheme.
CLIENT_SECRET_POST : Clients that have received a client_secret value from the Authorization Server, authenticate with the Authorization Server in accordance with Section 3.2.1 of OAuth 2.0 [RFC6749] by including the Client Credentials in the request body.
CLIENT_SECRET_JWT : Clients that have received a client_secret value from the Authorization Server, create a JWT using an HMAC SHA algorithm, such as HMAC SHA-256. The HMAC (Hash-based Message Authentication Code) is calculated using the octets of the UTF-8 representation of the client_secret as the shared key.
PRIVATE_KEY_JWT : Clients that have registered a public key sign a JWT using that key. The client authenticates in accordance with JSON Web Token (JWT) Profile for OAuth 2.0 Client Authentication and Authorization Grants [OAuth.JWT] and Assertion Framework for OAuth 2.0 Client Authentication and Authorization Grants [OAuth.Assertions].