Add config param disableTypeClaimCheck in order to validate external tokens without typ claim

Closes #33332

Signed-off-by: Venelin Cvetkov <venelin.tsvetkov@gmail.com>

js/apps/admin-ui/maven-resources/theme/keycloak.v2/admin/messages/messages_en.properties

@@ -315,6 +315,7 @@ revert=Revert
 eventTypes.IDENTITY_PROVIDER_RETRIEVE_TOKEN.description=Identity provider retrieve token
 dependentPermission=Dependent permission
 disableNonce=Disable nonce
+disableTypeClaimCheck=Disable type claim check
 addAssociatedRolesSuccess=Associated roles have been added
 groupDeleted_one=Group deleted
 userHelp=Optionally select user, for whom the example access token will be generated. If you do not select a user, example access token will not be generated during evaluation.
@@ -2831,6 +2832,7 @@ eventTypes.OAUTH2_DEVICE_CODE_TO_TOKEN.name=OAuth2 device code to token
 searchGroups=Search groups
 trusted-hosts.tooltip=List of Hosts, which are trusted and are allowed to invoke Client Registration Service and/or be used as values of Client URIs. You can use hostnames or IP addresses. If you use star at the beginning (for example '*.example.com' ) then whole domain example.com will be trusted.
 disableNonceHelp=Do not send the nonce parameter in the authentication request. The nonce parameter is sent and verified by default.
+disableTypeClaimCheckHelp=Disables the validation of the `typ` claim of tokens received from the Identity Provider. If this is `off` the type claim is validated (default).
 deleteClientProfile=Delete this client profile
 none=None
 type=Type

js/apps/admin-ui/src/identity-providers/add/ExtendedNonDiscoverySettings.tsx

@@ -57,6 +57,10 @@ export const ExtendedNonDiscoverySettings = () => {
         />
         <SwitchField field="config.disableUserInfo" label="disableUserInfo" />
         <SwitchField field="config.disableNonce" label="disableNonce" />
+        <SwitchField
+          field="config.disableTypeClaimCheck"
+          label="disableTypeClaimCheck"
+        />
         <TextField field="config.defaultScope" label="scopes" />
         <FormGroupField label="prompt">
           <Controller

services/src/main/java/org/keycloak/broker/oidc/OIDCIdentityProvider.java

@@ -896,7 +896,7 @@ public class OIDCIdentityProvider extends AbstractOAuth2IdentityProvider<OIDCIde
         }
 
         try {
-            if (!isTokenTypeSupported(parsedToken)) {
+            if (!getConfig().isDisableTypeClaimCheck() && !isTokenTypeSupported(parsedToken)) {
                 throw new ErrorResponseException(OAuthErrorException.INVALID_TOKEN, "token type not supported", Response.Status.BAD_REQUEST);
             }
             boolean idTokenType = OAuth2Constants.ID_TOKEN_TYPE.equals(subjectTokenType);

services/src/main/java/org/keycloak/broker/oidc/OIDCIdentityProviderConfig.java

@@ -168,6 +168,18 @@ public class OIDCIdentityProviderConfig extends OAuth2IdentityProviderConfig {
         }
     }
 
+    public boolean isDisableTypeClaimCheck() {
+        return Boolean.parseBoolean(getConfig().get("disableTypeClaimCheck"));
+    }
+
+    public void setDisableTypeClaimCheck(boolean disableTypeClaimCheck) {
+        if (disableTypeClaimCheck) {
+            getConfig().put("disableTypeClaimCheck", Boolean.TRUE.toString());
+        } else {
+            getConfig().remove("disableTypeClaimCheck");
+        }
+    }
+
     @Override
     public void validate(RealmModel realm) {
         super.validate(realm);

testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/broker/KcOidcBrokerTokenExchangeTest.java

@@ -223,6 +223,62 @@ public class KcOidcBrokerTokenExchangeTest extends AbstractInitializedBaseBroker
         }
     }
 
+    @Test
+    public void testIgnoredTokenTypesValidationWhenExplicitlyConfigured() throws Exception {
+        testingClient.server(BrokerTestConstants.REALM_CONS_NAME).run(KcOidcBrokerTokenExchangeTest::setupRealm);
+        RealmResource providerRealm = realmsResouce().realm(bc.providerRealmName());
+        ClientsResource clients = providerRealm.clients();
+        ClientRepresentation brokerApp = clients.findByClientId("brokerapp").get(0);
+        brokerApp.setDirectAccessGrantsEnabled(true);
+        ClientResource brokerAppResource = providerRealm.clients().get(brokerApp.getId());
+        brokerAppResource.update(brokerApp);
+        RealmResource consumerRealm = realmsResouce().realm(bc.consumerRealmName());
+        IdentityProviderResource identityProviderResource = consumerRealm.identityProviders().get(bc.getIDPAlias());
+        IdentityProviderRepresentation idpRep = identityProviderResource.toRepresentation();
+        idpRep.getConfig().put("disableUserInfo", "true");
+        idpRep.getConfig().put("disableTypeClaimCheck", "true");
+        identityProviderResource.update(idpRep);
+        getCleanup().addCleanup(() -> {
+            idpRep.getConfig().put("disableUserInfo", "false");
+            idpRep.getConfig().put("disableTypeClaimCheck", "false");
+            identityProviderResource.update(idpRep);
+        });
+
+        org.keycloak.testsuite.util.oauth.AccessTokenResponse tokenResponse = oauth.realm(bc.providerRealmName()).client(brokerApp.getClientId(), brokerApp.getSecret()).doPasswordGrantRequest(bc.getUserLogin(), bc.getUserPassword());
+        assertThat(tokenResponse.getIdToken(), notNullValue());
+        String idTokenString = tokenResponse.getIdToken();
+        oauth.realm(bc.providerRealmName());
+        oauth.logoutForm().idTokenHint(idTokenString)
+                .postLogoutRedirectUri(oauth.APP_AUTH_ROOT).open();
+        String logoutToken = testingClient.testApp().getBackChannelRawLogoutToken();
+        Assert.assertNotNull(logoutToken);
+
+        Client httpClient = AdminClientUtil.createResteasyClient();
+        try {
+            WebTarget exchangeUrl = httpClient.target(OAuthClient.AUTH_SERVER_ROOT)
+                    .path("/realms")
+                    .path(bc.consumerRealmName())
+                    .path("protocol/openid-connect/token");
+            // test user info validation.
+            try (Response response = exchangeUrl.request()
+                    .header(HttpHeaders.AUTHORIZATION, BasicAuthHelper.createHeader(
+                            "test-app", "secret"))
+                    .post(Entity.form(
+                            new Form()
+                                    .param(OAuth2Constants.GRANT_TYPE, OAuth2Constants.TOKEN_EXCHANGE_GRANT_TYPE)
+                                    .param(OAuth2Constants.SUBJECT_TOKEN, logoutToken)
+                                    .param(OAuth2Constants.SUBJECT_TOKEN_TYPE, OAuth2Constants.JWT_TOKEN_TYPE)
+                                    .param(OAuth2Constants.SUBJECT_ISSUER, bc.getIDPAlias())
+                                    .param(OAuth2Constants.SCOPE, OAuth2Constants.SCOPE_OPENID)
+
+                    ))) {
+                assertThat(response.getStatus(), equalTo(Status.OK.getStatusCode()));
+            }
+        } finally {
+            httpClient.close();
+        }
+    }
+
     @Test
     public void testInternalExternalTokenExchangeSessionToken() throws Exception {
         testingClient.server(bc.consumerRealmName()).run(KcOidcBrokerTokenExchangeTest::setupRealm);