Add Adobe to the list of supported providers

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Discovery.cs

@@ -152,11 +152,12 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     throw new ArgumentNullException(nameof(context));
                 }
 
-                // Microsoft Account supports both the "plain" and "S256" code challenge methods but
-                // doesn't list them in the server configuration metadata. To ensure the OpenIddict
-                // client uses Proof Key for Code Exchange for the Microsoft provider, the 2 methods
+                // Some providers support Proof Key for Code Exchange but don't list any supported code
+                // challenge method in the server configuration metadata. To ensure the OpenIddict client
+                // always uses Proof Key for Code Exchange for these providers, the supported methods
                 // are manually added to the list of supported code challenge methods by this handler.
-                if (context.Registration.ProviderType is ProviderTypes.Microsoft)
+
+                if (context.Registration.ProviderType is ProviderTypes.Adobe or ProviderTypes.Microsoft)
                 {
                     context.Configuration.CodeChallengeMethodsSupported.Add(CodeChallengeMethods.Plain);
                     context.Configuration.CodeChallengeMethodsSupported.Add(CodeChallengeMethods.Sha256);

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml

@@ -30,6 +30,20 @@
              Description="The optional value used as the 'resource' parameter (e.g urn:microsoft:userinfo)" />
   </Provider>
 
+  <!--
+                                                  ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
+                                                  █ ▄▄▀██ ▄▄▀██ ▄▄▄ ██ ▄▄▀██ ▄▄▄██
+                                                  █ ▀▀ ██ ██ ██ ███ ██ ▄▄▀██ ▄▄▄██
+                                                  █ ██ ██ ▀▀ ██ ▀▀▀ ██ ▀▀ ██ ▀▀▀██
+                                                  ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+  -->
+
+  <Provider Name="Adobe" Id="423c029c-147d-4f93-b94c-5e6e4aade643"
+            Documentation="https://developer.adobe.com/developer-console/docs/guides/authentication/UserAuthentication/">
+    <Environment Issuer="https://ims-na1.adobelogin.com/"
+                 ConfigurationEndpoint="https://ims-na1.adobelogin.com/ims/.well-known/openid-configuration" />
+  </Provider>
+
   <!--
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                               █ ▄▄▀██ ▄▄▀██ ▄▄▀██ ▄▄ █▄ ▄██ ▄▄▄ ████ ▄▄▄ ██ ▀██ ██ ████▄ ▄██ ▀██ ██ ▄▄▄██