add ID token verification endpoint

Author: yskkin

lib/line/bot/client.rb

@@ -145,6 +145,25 @@ def revoke_channel_access_token_jwt(access_token)
         post(oauth_endpoint, endpoint_path, payload, headers)
       end
 
+      # Verify ID token
+      #
+      # @param id_token [String] ID token
+      # @param options [Hash] Optional request body
+      #
+      # @return [Net::HTTPResponse]
+      def verify_id_token(id_token, options = {})
+        channel_id_required
+
+        endpoint_path = '/oauth2/v2.1/verify'
+        payload = URI.encode_www_form(
+          client_id: channel_id,
+          id_token: id_token,
+          **options
+        )
+        headers = { 'Content-Type' => 'application/x-www-form-urlencoded' }
+        post(oauth_endpoint, endpoint_path, payload, headers)
+      end
+
       # Get all valid channel access token key IDs v2.1
       #
       # @param jwt [String]

spec/line/bot/client_channel_token_spec.rb

@@ -112,4 +112,15 @@ def generate_client
 
     expect(response).to be_a(Net::HTTPOK)
   end
+
+  it 'verifies ID token' do
+    uri_template = Addressable::Template.new Line::Bot::API::DEFAULT_OAUTH_ENDPOINT + '/oauth2/v2.1/verify'
+    stub_request(:post, uri_template).to_return { |request| {body: '', status: 200} }
+
+    client = generate_client
+
+    response = client.verify_id_token('dummy_id_token', nonce: 'dummy_nonce')
+
+    expect(response).to be_a(Net::HTTPOK)
+  end
 end