Merge branch 'develop' into stable

README.md

@@ -0,0 +1,67 @@
+# Keycloak Extension for Activiti
+
+This library was created to expand the functionality of keycloak integration within the APS (Activiti App) application.  It includes a similar implementation for core Activiti (Activiti Engine), but the core functional is not delivered with that OOTB application at this time.
+
+The Activiti App delivers SSO capability and that is about it.  The user must already exist and group synchronization may only happen outside of the context of authentication.  Namely over another protocol (LDAP).
+
+This module expands SSO to include user creation and group synchronization.  Group synchronization uses the standard access token for Open ID Connect.  These groups are termed "roles".
+
+## Installation
+
+The installation is simple.  Just include the JAR in the classpath of your Activiti App application.  This is best done by not chaning the `activiti-app.war` file, but instead including it within the classpath using your web container configuration.  For Apache Tomcat, you would add or modify the following context file: `conf/Catalina/localhost/activiti-app.xml`.  Its related contents would be:
+
+```xml
+<Context>
+        <Resources>
+                <PostResources base="${catalina.base}/ext" className="org.apache.catalina.webresources.DirResourceSet" webAppMount="/WEB-INF/lib" readOnly="true" />
+        </Resources>
+</Context>
+```
+
+Notice the use of `PostResources` instead of `PreResources`.  This library needs to be loaded after the web application.  This is the best way to load any other extensions or customization to the Activiti App, including `JavaDelegate` implementations.
+
+## Configuration
+
+The library is highly configurable.  You configure it with properties specified in the `activiti-app.properties` file, which exists somewhere in the root of the classpath.  That is typically in the `lib` folder.  The properties to configure are enumerated in the table below.
+
+### Common
+
+| Property                                       | Default   | Description |
+| ---------------------------------------------- | --------- | ----------- |
+| `keycloak-ext.ais.enabled`                     | `false`   | Enable AIS integration, overriding and extending the OOTB AIS provider. |
+| `keycloak-ext.ootbSecurityConfig.enabled`      | `true`    | Enable OOTB functionality as if this module were not installed.  This adapter operates at priority `0`.  This means it only works if other adapters are disabled (default). |
+| `keycloak-ext.default.admins.users`            |           | A default set of administrators to add to the administration role on application startup. |
+| `keycloak-ext.clearNewUserDefaultGroups`       | `true`    | When creating a new user, clear any default groups added to that user.  This will not impact existing users. |
+| `keycloak-ext.resource.include.regex.patterns` |           | OIDC provides roles in the realm and all permitted clients/resources.  By default all resources are included.  You can limit it with regular expressions with this property. |
+| `keycloak-ext.group.format.regex.patterns`     |           | Reformat roles that match the specified regular expressions.  The replacements are specified in another property.  Multiple expressions may be specified by using commas.  Whitespace is not stripped. |
+| `keycloak-ext.group.format.regex.replacements` |           | Reformat roles with the specified replacement expressions.  The regular expressions are specified in another property.  Multiple expressions may be specified by using commas.  Whitespace is not stripped. |
+| `keycloak-ext.group.include.regex.patterns`    |           | If specified, only the roles that match the specified regular expressions will be considered; otherwise all roles are included. |
+| `keycloak-ext.group.exclude.regex.patterns`    |           | If specified, the roles that match the specified regular expressions will be ignored.  This overrides any role explicitly included. |
+| `keycloak-ext.syncInternalGroup`               | `false`   | If an internal group with the same name already exists, use that group instead of creating a new one with the same name.  Also register that internal group as external. |
+
+### For Activiti App Only
+
+| Property                                  | Default        | Description |
+| ----------------------------------------- | -------------- | ----------- |
+| `keycloak-ext.syncGroupAs`                | `organization` | When creating a new group, should it be a functional (`organization`) group or a system (`capability`) group? |
+| `keycloak-ext.external.id`                | `ais`            | When creating a new group or registering an internal group as external, use this ID as a prefix to the external group ID. |
+
+### Rare
+
+| Property                                  | Default         | Description |
+| ----------------------------------------- | --------------- | ----------- |
+| `keycloak-ext.ais.priority`               | `-10`           | The order of configurable adapters to use with the application.  Only the lowest priority enabled adapter will be used.  Values of `1`+ will only load if the OOTB adapter is disabled. |
+| `keycloak-ext.group.admins.validate`      | `false`         | Whether or not to validate the existence and capabilities of an administrators group on appliation startup.  This is only applicable for when one is accidently removed and no one has the rights to create one. |
+| `keycloak-ext.group.admins.name`          | `admins`        | The name of an administrators group to potentially add and default users on application startup. |
+| `keycloak-ext.group.admins.externalId`    | `admins`        | The name of an administrators group to potentially add and default users on application startup. |
+| `keycloak-ext.createMissingUser`          | `true`          | Before authentication, check to make sure the user exists as an APS user; if they don't, create the user. |
+| `keycloak-ext.createMissingGroup`         | `true`          | Before authorization, check to make sure groups exist for the roles the user claims; if they don't, create the groups. |
+| `keycloak-ext.syncGroupAdd`               | `true`          | If the user belongs to a role but not its corresponding group, add the user to the group. |
+| `keycloak-ext.syncGroupRemove`            | `true`          | If the user belongs to a group but does not have the corresponding role, remove the user from the group. |
+
+### Untested
+
+| Property                                  | Default         | Description |
+| ----------------------------------------- | --------------- | ----------- |
+| `keycloak-ext.keycloak.enabled`           | `false`         | Enable Keycloak integration, overriding and extending the OOTB Keycloak provider (*untested*). |
+| `keycloak-ext.keycloak.priority`          | `-5`            | The order of configurable adapters to use with the application.  Only the lowest priority enabled adapter will be used.  Values of `1`+ will only load if the OOTB adapter is disabled. |

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.inteligr8.activiti</groupId>
 	<artifactId>keycloak-activiti-app-ext</artifactId>
-	<version>1.0.0</version>
+	<version>1.2.0</version>
 	<name>Keycloak Authentication &amp; Authorization for APS</name>
 
 	<properties>
@@ -78,12 +78,21 @@
 			<id>activiti-releases</id>
 			<url>https://artifacts.alfresco.com/nexus/content/repositories/activiti-enterprise-releases</url>
 		</repository>
+		<repository>
+			<id>inteligr8-releases</id>
+			<url>https://repos.inteligr8.com/nexus/repository/inteligr8-private</url>
+		</repository>
 	</repositories>
 	
-	<pluginRepositories>
-		<pluginRepository>
+	<distributionManagement>
+		<repository>
 			<id>inteligr8-releases</id>
 			<url>https://repos.inteligr8.com/nexus/repository/inteligr8-public</url>
-		</pluginRepository>
-	</pluginRepositories>
+		</repository>
+		<snapshotRepository>
+			<id>inteligr8-snapshots</id>
+			<url>https://repos.inteligr8.com/nexus/repository/inteligr8-snapshots</url>
+		</snapshotRepository>
+	</distributionManagement>
+	
 </project>

src/main/java/com/activiti/conf/ActivitiOotbSecurityConfigurationAdapter.java

@@ -0,0 +1,57 @@
+package com.activiti.conf;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.stereotype.Component;
+
+import com.inteligr8.activiti.ActivitiSecurityConfigAdapter;
+
+/**
+ * This class/bean executes the OOTB security configuration without the
+ * override, so you can still use its OOTB features.  This will allow you to
+ * enable/disable features, chain them, and uset he OOTB features as a
+ * fallback or failsafe.
+ * 
+ * This class must be in the com.activiti.conf package so it can use protected
+ * fields and methods of the OOTB class instance.
+ * 
+ * @author brian@inteligr8.com
+ * @see com.activiti.conf.SecurityConfiguration
+ */
+@Component
+public class ActivitiOotbSecurityConfigurationAdapter implements ActivitiSecurityConfigAdapter {
+	
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    @Value("${keycloak-ext.ootbSecurityConfig.enabled:true}")
+    private boolean enabled;
+    
+    @Autowired
+    private SecurityConfiguration ootbSecurityConfig;
+    
+    @Override
+    public boolean isEnabled() {
+    	return this.enabled;
+    }
+    
+    public int getPriority() {
+    	return 0;
+    }
+	
+	@Override
+	public void configureGlobal(AuthenticationManagerBuilder authmanBuilder, UserDetailsService userDetailsService) {
+		this.logger.trace("configureGlobal()");
+
+		this.logger.info("Using OOTB authentication");
+		
+		// unset override (which has already been called in order to get here)
+		this.ootbSecurityConfig.securityConfigOverride = null;
+		
+		this.ootbSecurityConfig.configureGlobal(authmanBuilder);
+	}
+
+}

src/main/java/com/activiti/extension/conf/KeycloakExtSpringComponentScanner.java

@@ -4,7 +4,7 @@ import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 
 @Configuration
-@ComponentScan(basePackages = {"com.inteligr8.activiti.oidc"})
-public class OidcExtSpringComponentScanner {
+@ComponentScan(basePackages = {"com.inteligr8.activiti"})
+public class KeycloakExtSpringComponentScanner {
 
 }

src/main/java/com/inteligr8/activiti/ActivitiAppAdminGroupFixer.java

@@ -0,0 +1,128 @@
+package com.inteligr8.activiti;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import com.activiti.domain.idm.Group;
+import com.activiti.domain.idm.GroupCapability;
+import com.activiti.domain.idm.Tenant;
+import com.activiti.service.api.GroupService;
+
+/**
+ * This class/bean overrides the APS security configuration with a collection
+ * of implementations.  The OOTB extension only provides one override.  This
+ * uses that extension point, but delegates it out to multiple possible
+ * implementations.
+ * 
+ * Order cannot be controlled, so it should not be assumed in any adapter
+ * implementation.
+ * 
+ * @author brian@inteligr8.com
+ */
+@Component
+public class ActivitiAppAdminGroupFixer implements DataFixer {
+	
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    private final List<String> adminCapabilities = Arrays.asList(
+    		"access-all-models-in-tenant",
+    		"access-editor",
+    		"access-reports",
+    		"publish-app-to-dashboard",
+    		"tenant-admin",
+    		"tenant-admin-api",
+    		"upload-license");
+    
+    @Autowired(required = false)
+    private GroupService groupService;
+    
+    @Autowired
+    private TenantFinderService tenantFinderService;
+    
+    @Value("${keycloak-ext.group.admins.name:admins}")
+    private String adminGroupName;
+    
+    @Value("${keycloak-ext.group.admins.externalId:#{null}}")
+    private String adminGroupExternalId;
+    
+    @Value("${keycloak-ext.group.admins.validate:false}")
+    private boolean validateAdministratorsGroup;
+    
+    @Override
+	public void fix() {
+		this.logger.trace("fix()");
+		
+		if (this.logger.isTraceEnabled())
+			this.logGroups();
+		if (this.validateAdministratorsGroup)
+			this.validateAdmins();
+	}
+	
+	private void logGroups() {
+		if (this.groupService == null)
+			return;
+		
+		Collection<Tenant> tenants = this.tenantFinderService.getTenants();
+		for (Tenant tenant : tenants) {
+			this.logger.trace("Tenant: {} => {}", tenant.getId(), tenant.getName());
+			this.logger.trace("Functional groups: {}", this.toGroupNames(this.groupService.getFunctionalGroups(tenant.getId())));
+			this.logger.trace("System groups: {}", this.toGroupNames(this.groupService.getSystemGroups(tenant.getId())));
+		}
+		
+		this.logger.trace("Tenant: null");
+		this.logger.trace("Functional groups: {}", this.toGroupNames(this.groupService.getFunctionalGroups(null)));
+		this.logger.trace("System groups: {}", this.toGroupNames(this.groupService.getSystemGroups(null)));
+	}
+	
+	private void validateAdmins() {
+		if (this.groupService == null)
+			return;
+		
+    	Long tenantId = this.tenantFinderService.findTenantId();
+		Group group = this.groupService.getGroupByExternalIdAndTenantId(this.adminGroupExternalId, tenantId);
+		if (group == null) {
+			List<Group> groups = this.groupService.getGroupByNameAndTenantId(this.adminGroupName, tenantId);
+			if (!groups.isEmpty())
+				group = groups.iterator().next();
+		}
+
+		if (group == null) {
+			this.logger.info("Creating group: {} ({})", this.adminGroupName, this.adminGroupExternalId);
+			if (this.adminGroupExternalId != null) {
+				group = this.groupService.createGroupFromExternalStore(
+						this.adminGroupExternalId, tenantId, Group.TYPE_SYSTEM_GROUP, null, this.adminGroupName, new Date());
+			} else {
+				group = this.groupService.createGroup(this.adminGroupName, tenantId, Group.TYPE_SYSTEM_GROUP, null);
+			}
+		}
+
+		this.logger.debug("Checking group capabilities: {}", group.getName());
+		Group groupWithCaps = this.groupService.getGroup(group.getId(), false, true, false, false);
+		Set<String> adminCaps = new HashSet<>(this.adminCapabilities);
+		for (GroupCapability cap : groupWithCaps.getCapabilities())
+			adminCaps.remove(cap.getName());
+		if (!adminCaps.isEmpty()) {
+			this.logger.info("Granting group '{}' capabilities: {}", group.getName(), adminCaps);
+			this.groupService.addCapabilitiesToGroup(group.getId(), new ArrayList<>(adminCaps));
+		}
+	}
+	
+	private Collection<String> toGroupNames(Collection<Group> groups) {
+		List<String> groupNames = new ArrayList<>(groups.size());
+		for (Group group : groups)
+			groupNames.add(group.getName() + " [" + group.getExternalId() + "]");
+		return groupNames;
+	}
+
+}

src/main/java/com/inteligr8/activiti/ActivitiAppAdminMembersFixer.java

@@ -0,0 +1,86 @@
+package com.inteligr8.activiti;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import com.activiti.domain.idm.Group;
+import com.activiti.domain.idm.User;
+import com.activiti.service.api.GroupService;
+import com.activiti.service.api.UserService;
+
+/**
+ * This class/bean overrides the APS security configuration with a collection
+ * of implementations.  The OOTB extension only provides one override.  This
+ * uses that extension point, but delegates it out to multiple possible
+ * implementations.
+ * 
+ * Order cannot be controlled, so it should not be assumed in any adapter
+ * implementation.
+ * 
+ * @author brian@inteligr8.com
+ */
+@Component
+public class ActivitiAppAdminMembersFixer implements DataFixer {
+	
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    @Autowired(required = false)
+    private UserService userService;
+    
+    @Autowired(required = false)
+    private GroupService groupService;
+    
+    @Autowired
+    private TenantFinderService tenantFinderService;
+    
+    @Value("${keycloak-ext.default.admins.users:#{null}}")
+    private String adminUserStrs;
+    
+    @Value("${keycloak-ext.group.admins.name:admins}")
+    private String adminGroupName;
+    
+    @Value("${keycloak-ext.group.admins.externalId:#{null}}")
+    private String adminGroupExternalId;
+    
+    @Override
+	public void fix() {
+		this.logger.trace("fix()");
+		
+    	if (this.adminUserStrs != null && this.adminUserStrs.length() > 0)
+    		this.associateAdmins();
+	}
+	
+	private void associateAdmins() {
+		if (this.userService == null || this.groupService == null)
+			return;
+		
+		List<String> adminUsers = Arrays.asList(this.adminUserStrs.split(","));
+		if (adminUsers.isEmpty())
+			return;
+
+    	Long tenantId = this.tenantFinderService.findTenantId();
+    	List<Group> groups;
+		Group group1 = this.groupService.getGroupByExternalIdAndTenantId(this.adminGroupExternalId, tenantId);
+		if (group1 != null) {
+			groups = Arrays.asList(group1);
+		} else {
+			groups = this.groupService.getGroupByNameAndTenantId(this.adminGroupName, tenantId);
+		}
+		this.logger.debug("Found {} admin group(s)", groups.size());
+		
+		for (String email : adminUsers) {
+    		User user = this.userService.findUserByEmail(email);
+
+    		this.logger.debug("Adding {} to admin group(s)", user.getEmail());
+    		for (Group group : groups)
+    			this.groupService.addUserToGroup(group, user);
+		}
+	}
+
+}

src/main/java/com/inteligr8/activiti/ActivitiSecurityConfigAdapter.java

@@ -0,0 +1,38 @@
+package com.inteligr8.activiti;
+
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.springframework.security.core.userdetails.UserDetailsService;
+
+/**
+ * @author brian@inteligr8.com
+ */
+public interface ActivitiSecurityConfigAdapter extends Comparable<ActivitiSecurityConfigAdapter> {
+	
+	/**
+	 * Is the adapter enabled?  This allows for configurable enablement.
+	 * 
+	 * @return true if enabled; false otherwise
+	 */
+	boolean isEnabled();
+	
+	/**
+	 * The lower the value, the higher the priority.  The OOTB security
+	 * configuration uses priority 0.  Use negative values to supersede it.
+	 * Anything with equal priorities should be considered unordered and may
+	 * execute in a random order.
+	 * 
+	 * @return A priority; may be negative or positive
+	 */
+	int getPriority();
+	
+	/**
+	 * @see com.activiti.api.security.AlfrescoSecurityConfigOverride
+	 */
+	void configureGlobal(AuthenticationManagerBuilder authmanBuilder, UserDetailsService userDetailsService);
+	
+	@Override
+	default int compareTo(ActivitiSecurityConfigAdapter adapter) {
+		return Integer.compare(this.getPriority(), adapter.getPriority());
+	}
+
+}

src/main/java/com/inteligr8/activiti/DataFixer.java

@@ -0,0 +1,7 @@
+package com.inteligr8.activiti;
+
+public interface DataFixer {
+	
+	void fix();
+
+}

src/main/java/com/inteligr8/activiti/Inteligr8SecurityConfigurationRegistry.java

@@ -0,0 +1,59 @@
+package com.inteligr8.activiti;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.stereotype.Component;
+
+import com.activiti.api.security.AlfrescoSecurityConfigOverride;
+
+/**
+ * This class/bean overrides the APS security configuration with a collection
+ * of implementations.  The OOTB extension only provides one override.  This
+ * uses that extension point, but delegates it out to multiple possible
+ * implementations.
+ * 
+ * Order cannot be controlled, so it should not be assumed in any adapter
+ * implementation.
+ * 
+ * @author brian@inteligr8.com
+ */
+@Component
+public class Inteligr8SecurityConfigurationRegistry implements AlfrescoSecurityConfigOverride {
+	
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    @Autowired
+    private List<ActivitiSecurityConfigAdapter> adapters;
+    
+    @Autowired(required = false)
+    private List<DataFixer> fixers;
+	
+	@Override
+	public void configureGlobal(AuthenticationManagerBuilder authmanBuilder, UserDetailsService userDetailsService) {
+		this.logger.trace("configureGlobal()");
+		
+		Collections.sort(this.adapters);
+		
+		if (this.fixers != null) {
+			for (DataFixer fixer : this.fixers)
+				fixer.fix();
+		}
+		
+		for (ActivitiSecurityConfigAdapter adapter : this.adapters) {
+			if (adapter.isEnabled()) {
+				this.logger.info("Security adapter enabled: {}", adapter.getClass());
+				adapter.configureGlobal(authmanBuilder, userDetailsService);
+				break;
+			} else {
+				this.logger.info("Security adapter disabled: {}", adapter.getClass());
+			}
+		}
+	}
+
+}

src/main/java/com/inteligr8/activiti/TenantFinderService.java

@@ -0,0 +1,82 @@
+package com.inteligr8.activiti;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import com.activiti.domain.idm.Tenant;
+import com.activiti.service.idm.TenantService;
+import com.activiti.service.license.LicenseService;
+
+@Component
+public class TenantFinderService {
+	
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    @Autowired(required = false)
+    private LicenseService licenseService;
+    
+    @Autowired(required = false)
+    private TenantService tenantService;
+    
+    @Value("${keycloak-ext.tenant:#{null}}")
+    private String tenant;
+    
+    public Long findTenantId() {
+    	Tenant tenant = this.findTenant();
+    	return tenant == null ? null : tenant.getId();
+    }
+    
+    public Tenant findTenant() {
+		this.logger.debug("Checking for a single tenant ...");
+		
+    	String tenantName = null;
+    	if (this.tenant != null) {
+    		tenantName = this.tenant;
+    	} else {
+    		List<Object[]> tenants = this.tenantService.getAllTenants();
+    		if (tenants == null || tenants.isEmpty()) {
+    			this.logger.warn("No tenants found!");
+    			return null;
+    		} else if (tenants.size() == 1) {
+    			Object[] tenant = tenants.iterator().next();
+    			this.logger.debug("Only one tenant available; selecting it: {}", tenant[0]);
+    			return this.tenantService.getTenant((Long)tenant[0]);
+    		} else {
+    			tenantName = this.licenseService.getDefaultTenantName();
+    		}
+    	}
+    	
+		this.logger.debug("Trying to find by tenant name: {}", tenantName);
+		
+    	List<Tenant> tenants = this.tenantService.findTenantsByName(tenantName);
+    	if (tenants == null || tenants.isEmpty()) {
+    		this.logger.warn("Named tenant not found");
+    		return null;
+    	}
+
+		this.logger.debug("Found {} tenants with name {}; selecting the first one", tenants.size(), tenantName);
+    	return tenants.iterator().next();
+    }
+    
+    public Collection<Tenant> getTenants() {
+		List<Object[]> tenantObjs = this.tenantService.getAllTenants();
+		
+		List<Tenant> tenants = new ArrayList<>(tenantObjs.size());
+		for (Object[] tenantObj : tenantObjs) {
+			if (tenantObj != null && tenantObj[0] != null) {
+				Tenant tenant = this.tenantService.getTenant((Long)tenantObj[0]);
+				tenants.add(tenant);
+			}
+		}
+		
+		return tenants;
+    }
+
+}

src/main/java/com/inteligr8/activiti/ais/AbstractIdentityServiceActivitiAuthenticator.java

@@ -1,54 +0,0 @@
-package com.inteligr8.activiti.ais;
-
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.Set;
-
-import org.keycloak.KeycloakPrincipal;
-import org.keycloak.KeycloakSecurityContext;
-import org.keycloak.adapters.OidcKeycloakAccount;
-import org.keycloak.adapters.springsecurity.token.KeycloakAuthenticationToken;
-import org.keycloak.representations.AccessToken;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.core.GrantedAuthority;
-
-import com.activiti.security.identity.service.authentication.provider.IdentityServiceAuthenticationToken;
-
-public abstract class AbstractIdentityServiceActivitiAuthenticator implements Authenticator {
-	
-    private final Logger logger = LoggerFactory.getLogger(this.getClass());
-    
-
-    
-    protected AccessToken getOidcAccessToken(Authentication auth) {
-    	KeycloakSecurityContext ksc = this.getKeycloakSecurityContext(auth);
-    	return ksc.getToken();
-    }
-    
-    @SuppressWarnings("unchecked")
-	protected KeycloakSecurityContext getKeycloakSecurityContext(Authentication auth) {
-    	if (auth instanceof KeycloakAuthenticationToken) {
-    		this.logger.debug("Fetching KeycloakSecurityContext from KeycloakAuthenticationToken");
-    		if (auth.getPrincipal() instanceof KeycloakPrincipal) {
-    			return ((KeycloakPrincipal<? extends KeycloakSecurityContext>)auth.getPrincipal()).getKeycloakSecurityContext();
-    		} else {
-    			return null;
-    		}
-    	} else if (auth instanceof IdentityServiceAuthenticationToken) {
-    		this.logger.debug("Fetching KeycloakSecurityContext from IdentityServiceAuthenticationToken");
-    		OidcKeycloakAccount account = ((IdentityServiceAuthenticationToken)auth).getAccount();
-    		return account == null ? null : account.getKeycloakSecurityContext();
-    	} else {
-    		return null;
-    	}
-    }
-    
-    protected Set<String> toSet(Collection<? extends GrantedAuthority> grantedAuthorities) {
-    	Set<String> authorities = new HashSet<>(grantedAuthorities.size());
-    	for (GrantedAuthority grantedAuthority : grantedAuthorities)
-    		authorities.add(grantedAuthority.getAuthority());
-    	return authorities;
-    }
-}

src/main/java/com/inteligr8/activiti/ais/IdentityServiceActivitiAppAuthenticator.java

@@ -1,211 +0,0 @@
-package com.inteligr8.activiti.ais;
-
-import java.util.Date;
-import java.util.List;
-import java.util.Set;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import org.apache.commons.lang3.StringUtils;
-import org.keycloak.representations.AccessToken;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.context.annotation.Lazy;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.core.AuthenticationException;
-import org.springframework.stereotype.Component;
-
-import com.activiti.domain.idm.Group;
-import com.activiti.domain.idm.Tenant;
-import com.activiti.domain.idm.User;
-import com.activiti.service.api.GroupService;
-import com.activiti.service.api.UserService;
-import com.activiti.service.idm.TenantService;
-import com.activiti.service.license.LicenseService;
-
-/**
- * This class/bean implements an Open ID Connect authenticator for Alfresco
- * Process Services that supports the creation of missing users and groups and
- * synchronizes user/group membership.  This is configurable using several
- * Spring property values starting with the `keycloak-ext.` prefix.
- * 
- * This implements an internal Authenticator so other authenticators could be
- * created in the future.
- * 
- * FIXME This implements is not good for multi-tenancy.
- * 
- * @author brian.long@yudrio.com
- */
-@Component("activiti-app.authenticator")
-@Lazy
-public class IdentityServiceActivitiAppAuthenticator extends AbstractIdentityServiceActivitiAuthenticator implements Authenticator {
-	
-    private final Logger logger = LoggerFactory.getLogger(this.getClass());
-    
-    private final Pattern emailNamesPattern = Pattern.compile("([A-Za-z]+)[A-Za-z0-9]*\\.([A-Za-z]+)[A-Za-z0-9]*@.*");
-    private final String externalIdmSource = "ais";
-    
-    @Value("${keycloak-ext.createMissingUser:true}")
-    private boolean createMissingUser;
-
-    @Value("${keycloak-ext.clearNewUserGroups:true}")
-    private boolean clearNewUserGroups;
-
-    @Value("${keycloak-ext.createMissingGroup:true}")
-    private boolean createMissingGroup;
-
-    @Value("${keycloak-ext.syncGroupAdd:true}")
-    private boolean syncGroupAdd;
-
-    @Value("${keycloak-ext.syncGroupRemove:true}")
-    private boolean syncGroupRemove;
-
-    @Autowired
-    private LicenseService licenseService;
-    
-    @Autowired
-    private TenantService tenantService;
-    
-    @Autowired
-    private UserService userService;
-
-    @Autowired
-    private GroupService groupService;
-    
-    /**
-     * This method validates that the user exists, if not, it creates the
-     * missing user.  Without this functionality, SSO straight up fails in APS.
-     */
-    @Override
-    public void preAuthenticate(Authentication auth) throws AuthenticationException { 
-    	Long tenantId = this.findDefaultTenantId();
-		this.logger.trace("Tenant ID: {}", tenantId);
-		
-    	User user = this.findUser(auth, tenantId);
-    	if (user == null) {
-    		if (this.createMissingUser) {
-	    		this.logger.debug("User does not yet exist; creating the user: {}", auth.getName());
-	    		
-	    		user = this.createUser(auth, tenantId);
-	    		this.logger.debug("Created user: {} => {}", user.getId(), user.getExternalId());
-	    		
-	    		if (this.clearNewUserGroups) {
-		    		this.logger.debug("Clearing groups: {}", user.getId());
-	    			// fetch and remove default groups
-	    			user = this.userService.findUserByEmailFetchGroups(user.getEmail());
-	    			for (Group group : user.getGroups())
-	    				this.groupService.deleteUserFromGroup(group, user);
-	    		}
-    		} else {
-    			this.logger.info("User does not exist; user creation is disabled: {}", auth.getName());
-    		}
-    	}
-    }
-    
-    /**
-     * This method validates that the groups exist, if not, it creates the
-     * missing ones.  Without this functionality, SSO works, but the user's
-     * authorities are not synchronized.
-     */
-    @Override
-    public void postAuthenticate(Authentication auth) throws AuthenticationException {
-    	Long tenantId = this.findDefaultTenantId();
-    	User user = this.findUser(auth, tenantId);
-		this.logger.debug("Inspecting user: {} => {}", user.getId(), user.getExternalId());
-		
-    	this.syncUserAuthorities(user, auth, tenantId);
-    }
-    
-    private Long findDefaultTenantId() {
-    	String defaultTenantName = this.licenseService.getDefaultTenantName();
-		this.logger.trace("Default Tenant: {}", defaultTenantName);
-		
-    	List<Tenant> tenants = this.tenantService.findTenantsByName(defaultTenantName);
-    	if (tenants == null || tenants.isEmpty()) {
-    		this.logger.warn("Default tenant not found");
-    		return null;
-    	}
-    	
-    	Tenant tenant = tenants.iterator().next();
-    	return tenant.getId();
-    }
-    
-    private User findUser(Authentication auth, Long tenantId) {
-    	String email = auth.getName();
-		
-    	User user = this.userService.findUserByEmailAndTenantId(email, tenantId);
-    	if (user == null) {
-    		this.logger.debug("User does not exist in tenant; trying tenant-less lookup: {}", email);
-    		user = this.userService.findUserByEmail(email);
-    	} else {
-    		this.logger.trace("Found user: {}", user.getId());
-    	}
-    	
-    	return user;
-    }
-    
-    private User createUser(Authentication auth, Long tenantId) {
-		AccessToken atoken = this.getOidcAccessToken(auth);
-		if (atoken == null) {
-    		this.logger.debug("The OIDC access token could not be found; using email to determine names: {}", auth.getName());
-    		Matcher emailNamesMatcher = this.emailNamesPattern.matcher(auth.getName());
-    		if (!emailNamesMatcher.matches()) {
-        		this.logger.warn("The email address could not be parsed for names: {}", auth.getName());
-    			return this.userService.createNewUserFromExternalStore(auth.getName(), "Unknown", "User", tenantId, auth.getName(), this.externalIdmSource, new Date());
-    		} else {
-    			String firstName = StringUtils.capitalize(emailNamesMatcher.group(1));
-    			String lastName = StringUtils.capitalize(emailNamesMatcher.group(2));
-    			return this.userService.createNewUserFromExternalStore(auth.getName(), firstName, lastName, tenantId, auth.getName(), this.externalIdmSource, new Date());
-    		}
-		} else {
-			return this.userService.createNewUserFromExternalStore(auth.getName(), atoken.getGivenName(), atoken.getFamilyName(), tenantId, auth.getName(), this.externalIdmSource, new Date());
-		}
-    }
-
-    private void syncUserAuthorities(User user, Authentication auth, Long tenantId) {
-    	Set<String> authorities = this.toSet(auth.getAuthorities());
-		this.logger.debug("OIDC authorities: {}", authorities);
-    	
-		// check Activiti groups
-		User userWithGroups = this.userService.findUserByEmailFetchGroups(user.getEmail());
-		for (Group group : userWithGroups.getGroups()) {
-			this.logger.trace("Inspecting group: {} => ", group.getId(), group.getExternalId());
-			
-			if (authorities.remove(group.getExternalId())) {
-				// all good
-			} else {
-				if (this.syncGroupRemove) {
-					this.logger.trace("Removing user '{}' from group '{}'", user.getExternalId(), group.getExternalId());
-					this.groupService.deleteUserFromGroup(group, userWithGroups);
-				} else {
-					this.logger.debug("User/group membership sync disabled; not removing user from group: {} => {}", user.getExternalId(), group.getExternalId());
-				}
-			}
-		}
-		
-		// add remaining authorities into Activiti
-		for (String authority : authorities) {
-			this.logger.trace("Syncing group membership: {}", authority);
-			
-			Group group = this.groupService.getGroupByExternalId(authority);
-			if (group == null) {
-				if (this.createMissingGroup) {
-					this.logger.trace("Creating new group: {}", authority);
-					String shortAuthority = authority.replaceFirst("[A-Z]+_", "");
-					group = this.groupService.createGroupFromExternalStore(shortAuthority, tenantId, Group.TYPE_SYSTEM_GROUP, null, authority, new Date());
-				} else {
-	    			this.logger.debug("Group does not exist; group creation is disabled: {}", authority);
-				}
-			}
-
-			if (group != null && this.syncGroupAdd) {
-				this.logger.trace("Adding user '{}' from group '{}'", user.getExternalId(), group.getExternalId());
-				this.groupService.addUserToGroup(group, userWithGroups);
-			} else {
-				this.logger.debug("User/group membership sync disabled; not adding user to group: {} => {}", user.getExternalId(), group.getExternalId());
-			}
-		}
-    }
-}

src/main/java/com/inteligr8/activiti/ais/IdentityServiceAuthenticationProviderAdapter.java

@@ -1,38 +0,0 @@
-package com.inteligr8.activiti.ais;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.beans.factory.annotation.Qualifier;
-import org.springframework.security.authentication.AuthenticationProvider;
-
-import com.activiti.api.security.AlfrescoAuthenticationProviderOverride;
-
-/**
- * FIXME This would be nice, but with AIS enabled, it is never called.  The use
- * of this requires a fix from the Alfresco/Activiti team.  Their AIS
- * authentication logic appears to have been hastily added, breaking this
- * override possibility.  We are instead using the heavier weight
- * `OidcSecurityConfigurationAdapter` and re-implementing the authentication
- * logic discovered in the `activiti-app` project
- * `com.activiti.conf.SecurityConfiguration` class.
- * 
- * @author brian.long@yudrio.com
- * @see IdentityServiceSecurityConfigurationAdapter
- */
-//@Component
-public class IdentityServiceAuthenticationProviderAdapter implements AlfrescoAuthenticationProviderOverride {
-	
-    private final Logger logger = LoggerFactory.getLogger(this.getClass());
-    
-    @Autowired
-    @Qualifier("activiti-app.authenticator")
-    private Authenticator authenticator;
-    
-    @Override
-    public AuthenticationProvider createAuthenticationProvider() {
-    	this.logger.trace("createAuthenticationProvider()");
-    	return new InterceptingIdentityServiceAuthenticationProvider(this.authenticator);
-    }
-
-}

src/main/java/com/inteligr8/activiti/ais/IdentityServiceSecurityConfigurationAdapter.java

@@ -1,3 +1,4 @@
+
 package com.inteligr8.activiti.ais;
 
 import org.slf4j.Logger;
@@ -11,27 +12,31 @@ import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.stereotype.Component;
 
 import com.activiti.api.msmt.MsmtTenantResolver;
-import com.activiti.api.security.AlfrescoSecurityConfigOverride;
 import com.activiti.conf.MsmtProperties;
+import com.activiti.security.identity.service.authentication.provider.IdentityServiceAuthenticationProvider;
+import com.inteligr8.activiti.ActivitiSecurityConfigAdapter;
+import com.inteligr8.activiti.auth.Authenticator;
+import com.inteligr8.activiti.auth.InterceptingAuthenticationProvider;
 
 /**
- * This class/bean overrides the AIS authentication provider, enabling a more
- * complete integration with AIS.
+ * This class/bean injects a custom AIS authentication provider into the
+ * security configuration.
  * 
- * FIXME This is not optimal, but with AIS enabled, we cannot use the proper
- * override.
- * 
- * @author brian.long@yudrio.com
- * @see IdentityServiceAuthenticationProviderAdapter
+ * @author brian@inteligr8.com
+ * @see com.activiti.security.identity.service.authentication.provider.IdentityServiceAuthenticationProvider
  */
 @Component
-public class IdentityServiceSecurityConfigurationAdapter implements AlfrescoSecurityConfigOverride {
+public class IdentityServiceSecurityConfigurationAdapter implements ActivitiSecurityConfigAdapter {
 	
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
     
-    @Value("${keycloak.ext.odic.enabled:true}")
+    @Value("${keycloak-ext.ais.enabled:false}")
     private boolean enabled;
 
+	// this assures execution before the OOTB impl (-10 < 0)
+    @Value("${keycloak-ext.ais.priority:-10}")
+    private int priority;
+    
     @Autowired
     protected MsmtProperties msmtProperties;
 
@@ -39,7 +44,7 @@ public class IdentityServiceSecurityConfigurationAdapter implements AlfrescoSecu
     protected MsmtTenantResolver tenantResolver;
     
     @Autowired
-    @Qualifier("activiti-app.authenticator")
+    @Qualifier("keycloak-ext.activiti-app.authenticator")
     private Authenticator authenticator;
     
     protected Authenticator getAuthenticator() {
@@ -47,20 +52,28 @@ public class IdentityServiceSecurityConfigurationAdapter implements AlfrescoSecu
 	}
     
     @Override
-	public void configureGlobal(AuthenticationManagerBuilder authmanBuilder, UserDetailsService userDetailsService) {
+    public boolean isEnabled() {
+    	return this.enabled;
+    }
+    
+    @Override
+    public int getPriority() {
+    	return this.priority;
+    }
+	
+	@Override
+	public void configureGlobal(AuthenticationManagerBuilder auth, UserDetailsService userDetailsService) {
 		this.logger.trace("configureGlobal()");
 		
-		if (this.enabled) {
-			this.logger.info("Using Keycloak authentication extension, featuring creation of missing users and authority synchronization");
+		this.logger.info("Using AIS authentication extension, featuring creation of missing users and authority synchronization");
 		
-			InterceptingIdentityServiceAuthenticationProvider provider = new InterceptingIdentityServiceAuthenticationProvider(this.getAuthenticator());
+		IdentityServiceAuthenticationProvider provider = new IdentityServiceAuthenticationProvider();
         if (this.msmtProperties.isMultiSchemaMultiTenantEnabled())
             provider.setTenantResolver(this.tenantResolver);
         provider.setUserDetailsService(userDetailsService);
 		provider.setGrantedAuthoritiesMapper(new SimpleAuthorityMapper());
 
-			authmanBuilder.authenticationProvider(provider);
-		}
+		auth.authenticationProvider(new InterceptingAuthenticationProvider(provider, this.getAuthenticator()));
 	}
 
 }

src/main/java/com/inteligr8/activiti/auth/Authenticator.java

@@ -1,4 +1,4 @@
-package com.inteligr8.activiti.ais;
+package com.inteligr8.activiti.auth;
 
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.AuthenticationException;

src/main/java/com/inteligr8/activiti/auth/InterceptingAuthenticationProvider.java

@@ -1,29 +1,35 @@
-package com.inteligr8.activiti.ais;
+package com.inteligr8.activiti.auth;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.security.authentication.AuthenticationProvider;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.AuthenticationException;
 
-import com.activiti.security.identity.service.authentication.provider.IdentityServiceAuthenticationProvider;
-
 /**
- * This class/bean extends the APS AIS OOTB authentication provider.  It uses
- * an `Authenticator` to pre/post authenticate.  The pre-authentication allows
- * us to circumvent the problem with AIS and missing users.  The
- * post-authentication allow us to synchronize groups/authorities.
+ * This class/bean provides a pre/post authentication capability to the
+ * Spring AuthenticationProvider.  The pre-authentication hook allows us to
+ * circumvent the problem with authenticating missing users.  The
+ * post-authentication hook allow us to synchronize groups/authorities.
  * 
- * @author brian.long@yudrio.com
+ * @author brian@inteligr8.com
  */
-public class InterceptingIdentityServiceAuthenticationProvider extends IdentityServiceAuthenticationProvider {
+public class InterceptingAuthenticationProvider implements AuthenticationProvider {
 
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    private final AuthenticationProvider provider;
     private final Authenticator authenticator;
     
-    public InterceptingIdentityServiceAuthenticationProvider(Authenticator authenticator) {
+    public InterceptingAuthenticationProvider(AuthenticationProvider provider, Authenticator authenticator) {
+    	this.provider = provider;
     	this.authenticator = authenticator;
 	}
     
+    @Override
+    public boolean supports(Class<?> authClass) {
+    	return this.provider.supports(authClass);
+    }
+    
     @Override
     public Authentication authenticate(Authentication auth) throws AuthenticationException {
 		this.logger.trace("authenticate({})", auth.getName());
@@ -31,13 +37,9 @@ public class InterceptingIdentityServiceAuthenticationProvider extends IdentityS
 		this.authenticator.preAuthenticate(auth);
     	this.logger.debug("Pre-authenticated user: {}", auth.getName());
     	
-    	auth = super.authenticate(auth);
+    	auth = this.provider.authenticate(auth);
     	this.logger.debug("Authenticated user '{}' with authorities: {}", auth.getName(), auth.getAuthorities());
     	
-    	// FIXME temporary for debugging
-    	if (auth.getName().equals("admin@app.activiti.com"))
-    		return auth;
-    	
     	this.authenticator.postAuthenticate(auth);
     	this.logger.debug("Post-authenticated user: {}", auth.getName());
     	

src/main/java/com/inteligr8/activiti/keycloak/AbstractKeycloakActivitiAuthenticator.java

@@ -0,0 +1,269 @@
+package com.inteligr8.activiti.keycloak;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang3.StringUtils;
+import org.keycloak.KeycloakPrincipal;
+import org.keycloak.KeycloakSecurityContext;
+import org.keycloak.adapters.springsecurity.token.KeycloakAuthenticationToken;
+import org.keycloak.representations.AccessToken;
+import org.keycloak.representations.AccessToken.Access;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.data.util.Pair;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.GrantedAuthority;
+
+import com.inteligr8.activiti.auth.Authenticator;
+
+public abstract class AbstractKeycloakActivitiAuthenticator implements Authenticator, InitializingBean {
+	
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    @Value("${keycloak-ext.createMissingUser:true}")
+    protected boolean createMissingUser;
+
+    @Value("${keycloak-ext.clearNewUserDefaultGroups:true}")
+    protected boolean clearNewUserDefaultGroups;
+
+    @Value("${keycloak-ext.createMissingGroup:true}")
+    protected boolean createMissingGroup;
+
+    @Value("${keycloak-ext.syncGroupAdd:true}")
+    protected boolean syncGroupAdd;
+
+    @Value("${keycloak-ext.syncGroupRemove:true}")
+    protected boolean syncGroupRemove;
+
+    @Value("${keycloak-ext.syncInternalGroups:false}")
+    protected boolean syncInternalGroups;
+    
+    @Value("${keycloak-ext.resource.include.regex.patterns:#{null}}")
+    protected String resourceRegexIncludes;
+    
+    @Value("${keycloak-ext.group.format.regex.patterns:#{null}}")
+    protected String regexPatterns;
+    
+    @Value("${keycloak-ext.group.format.regex.replacements:#{null}}")
+    protected String regexReplacements;
+    
+    @Value("${keycloak-ext.group.include.regex.patterns:#{null}}")
+    protected String regexIncludes;
+    
+    @Value("${keycloak-ext.group.exclude.regex.patterns:#{null}}")
+    protected String regexExcludes;
+    
+    protected final List<Pair<Pattern, String>> groupFormatters = new LinkedList<>();
+    protected final Set<Pattern> resourceIncludes = new HashSet<>();
+    protected final Set<Pattern> groupIncludes = new HashSet<>();
+    protected final Set<Pattern> groupExcludes = new HashSet<>();
+    
+    @Override
+    public void afterPropertiesSet() {
+    	if (this.regexPatterns != null) {
+    		String[] regexPatternStrs = StringUtils.split(this.regexPatterns, ',');
+    		String[] regexReplaceStrs = this.regexReplacements == null ? new String[0] : StringUtils.split(this.regexReplacements, ",");
+    		for (int i = 0; i < regexPatternStrs.length; i++) {
+    			Pattern regexPattern = Pattern.compile(regexPatternStrs[i]);
+    			String regexReplace = (i < regexReplaceStrs.length) ? regexReplaceStrs[i] : "";
+    	    	this.groupFormatters.add(Pair.of(regexPattern, regexReplace));
+    		}
+    	}
+    	
+    	if (this.resourceRegexIncludes != null) {
+    		String[] regexPatternStrs = StringUtils.split(this.resourceRegexIncludes, ',');
+    		for (int i = 0; i < regexPatternStrs.length; i++)
+    			this.resourceIncludes.add(Pattern.compile(regexPatternStrs[i]));
+    	}
+    	
+    	if (this.regexIncludes != null) {
+    		String[] regexPatternStrs = StringUtils.split(this.regexIncludes, ',');
+    		for (int i = 0; i < regexPatternStrs.length; i++)
+    			this.groupIncludes.add(Pattern.compile(regexPatternStrs[i]));
+    	}
+    	
+    	if (this.regexExcludes != null) {
+    		String[] regexPatternStrs = StringUtils.split(this.regexExcludes, ',');
+    		for (int i = 0; i < regexPatternStrs.length; i++)
+    			this.groupExcludes.add(Pattern.compile(regexPatternStrs[i]));
+    	}
+    }
+    
+
+    
+    protected Map<String, String> getKeycloakRoles(Authentication auth) {
+    	Map<String, String> authorities = new HashMap<>();
+		
+		AccessToken atoken = this.getKeycloakAccessToken(auth);
+		if (atoken == null) {
+			this.logger.debug("Access token not available");
+			return null;
+		} else if (atoken.getRealmAccess() == null && atoken.getResourceAccess().isEmpty()) {
+			this.logger.debug("Access token has no role information");
+			return null;
+		} else {
+			if (atoken.getRealmAccess() != null) {
+				this.logger.debug("Access token realm roles: {}", atoken.getRealmAccess().getRoles());
+				Collection<String> roles = this.filterRoles(atoken.getRealmAccess().getRoles());
+				Map<String, String> mappedRoles = this.formatRoles(roles);
+				authorities.putAll(mappedRoles);
+			}
+			
+			for (Entry<String, Access> resourceAccess : atoken.getResourceAccess().entrySet()) {
+				if (this.includeResource(resourceAccess.getKey())) {
+					this.logger.debug("Access token resources '{}' roles: {}", resourceAccess.getKey(), resourceAccess.getValue().getRoles());
+					Collection<String> roles = this.filterRoles(resourceAccess.getValue().getRoles());
+					Map<String, String> mappedRoles = this.formatRoles(roles);
+					authorities.putAll(mappedRoles);
+				}
+			}
+
+			this.logger.debug("Access token authorities: {}", authorities);
+		}
+		
+		return authorities;
+    }
+    
+    private Collection<String> filterRoles(Collection<String> unfilteredRoles) {
+		if (this.groupIncludes.isEmpty() && this.groupExcludes.isEmpty())
+			return unfilteredRoles;
+		
+    	Set<String> filteredRoles = new HashSet<>(unfilteredRoles.size());
+    	
+    	for (String role : unfilteredRoles) {
+    		boolean doInclude = this.groupIncludes.isEmpty();
+    		for (Pattern regex : this.groupIncludes) {
+    			Matcher matcher = regex.matcher(role);
+    			if (matcher.matches()) {
+    				this.logger.debug("Role matched inclusion filter: {}", role);
+    				doInclude = true;
+    				break;
+    			}
+    		}
+    		
+    		if (doInclude) {
+    			for (Pattern regex : this.groupExcludes) {
+        			Matcher matcher = regex.matcher(role);
+        			if (matcher.matches()) {
+        				this.logger.debug("Role matched exclusion filter: {}", role);
+        				doInclude = false;
+        				break;
+        			}
+        		}
+    			
+    			if (doInclude)
+    				filteredRoles.add(role);
+    		}
+    	}
+    	
+    	return filteredRoles;
+    }
+    
+    private Map<String, String> formatRoles(Collection<String> unformattedRoles) {
+    	Map<String, String> formattedRoles = new HashMap<>(unformattedRoles.size());
+    	
+    	for (String unformattedRole : unformattedRoles) {
+    		String formattedRole = null;
+    		
+    		for (Pair<Pattern, String> regex : this.groupFormatters) {
+    			Matcher matcher = regex.getFirst().matcher(unformattedRole);
+    			if (matcher.matches()) {
+    				this.logger.trace("Role matched formatter: {}", unformattedRole);
+    				formattedRole = matcher.replaceFirst(regex.getSecond());
+    				this.logger.debug("Role formatted: {}", formattedRole);
+    				break;
+    			}
+    		}
+    		
+    		formattedRoles.put(unformattedRole, formattedRole == null ? unformattedRole : formattedRole);
+    	}
+    	
+    	return formattedRoles;
+    }
+    
+    private boolean includeResource(String resource) {
+		if (this.resourceIncludes.isEmpty())
+			return true;
+		
+		for (Pattern resourceInclude : this.resourceIncludes) {
+			Matcher matcher = resourceInclude.matcher(resource);
+			if (matcher.matches())
+				return true;
+		}
+		
+		return false;
+    }
+    
+    protected AccessToken getKeycloakAccessToken(Authentication auth) {
+    	KeycloakSecurityContext ksc = this.getKeycloakSecurityContext(auth);
+    	return ksc == null ? null : ksc.getToken();
+    }
+    
+    @SuppressWarnings("unchecked")
+	protected KeycloakSecurityContext getKeycloakSecurityContext(Authentication auth) {
+		if (auth.getCredentials() instanceof KeycloakSecurityContext) {
+			this.logger.debug("Found keycloak context in credentials");
+			return (KeycloakSecurityContext)auth.getCredentials();
+		} else if (auth.getPrincipal() instanceof KeycloakPrincipal) {
+			this.logger.debug("Found keycloak context in principal: {}", auth.getPrincipal());
+			return ((KeycloakPrincipal<? extends KeycloakSecurityContext>)auth.getPrincipal()).getKeycloakSecurityContext();
+		} else if (!(auth instanceof KeycloakAuthenticationToken)) {
+			this.logger.warn("Unexpected token: {}", auth.getClass());
+    		return null;
+    	}
+    	
+		KeycloakAuthenticationToken ktoken = (KeycloakAuthenticationToken)auth;
+		if (ktoken.getAccount() != null) {
+			this.logger.debug("Found keycloak context in account: {}", ktoken.getAccount().getPrincipal() == null ? null : ktoken.getAccount().getPrincipal().getName());
+			return ktoken.getAccount().getKeycloakSecurityContext();
+		} else {
+			this.logger.warn("Unable to find keycloak security context");
+			this.logger.debug("Principal: {}", auth.getPrincipal());
+			this.logger.debug("Account: {}", ktoken.getAccount());
+			if (auth.getPrincipal() != null)
+				this.logger.debug("Principal type: {}", auth.getPrincipal().getClass());
+			return null;
+		}
+    }
+    
+    protected <K, V> boolean removeMapEntriesByValue(Map<K, V> map, V value) {
+    	if (value == null)
+    		throw new IllegalArgumentException();
+    	
+    	int found = 0;
+    	
+    	Iterator<Entry<K, V>> i = map.entrySet().iterator();
+    	while (i.hasNext()) {
+    		Entry<K, V> entry = i.next();
+    		if (entry.getValue() != null && value.equals(entry.getValue())) {
+    			i.remove();
+    			found++;
+    		}
+    	}
+    	
+    	return found > 0;
+    }
+    
+    protected Set<String> toSet(Collection<? extends GrantedAuthority> grantedAuthorities) {
+    	Set<String> authorities = new HashSet<>(Math.max(grantedAuthorities.size(), 16));
+    	for (GrantedAuthority grantedAuthority : grantedAuthorities) {
+    		String authority = StringUtils.trimToNull(grantedAuthority.getAuthority());
+    		if (authority == null)
+    			this.logger.warn("The granted authorities include an empty authority!?: '{}'", grantedAuthority.getAuthority());
+    		authorities.add(authority);
+    	}
+    	return authorities;
+    }
+}

src/main/java/com/inteligr8/activiti/keycloak/KeycloakActivitiAppAuthenticator.java

@@ -0,0 +1,267 @@
+package com.inteligr8.activiti.keycloak;
+
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.persistence.NonUniqueResultException;
+
+import org.apache.commons.lang3.StringUtils;
+import org.keycloak.representations.AccessToken;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.stereotype.Component;
+
+import com.activiti.domain.idm.Group;
+import com.activiti.domain.idm.User;
+import com.activiti.service.api.GroupService;
+import com.activiti.service.api.UserService;
+import com.inteligr8.activiti.TenantFinderService;
+
+/**
+ * This class/bean implements an Open ID Connect authenticator for Alfresco
+ * Process Services that supports the creation of missing users and groups and
+ * synchronizes user/group membership.  This is configurable using several
+ * Spring property values starting with the `keycloak-ext.` prefix.
+ * 
+ * This implements an internal Authenticator so other authenticators could be
+ * created in the future.
+ * 
+ * FIXME This implements is not good for multi-tenancy.
+ * 
+ * @author brian.long@yudrio.com
+ */
+@Component("keycloak-ext.activiti-app.authenticator")
+@Lazy
+public class KeycloakActivitiAppAuthenticator extends AbstractKeycloakActivitiAuthenticator {
+	
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    private final Pattern emailNamesPattern = Pattern.compile("([A-Za-z]+)[A-Za-z0-9]*\\.([A-Za-z]+)[A-Za-z0-9]*@.*");
+    
+    @Autowired
+    private UserService userService;
+
+    @Autowired
+    private GroupService groupService;
+    
+    @Autowired
+    private TenantFinderService tenantFinderService;
+    
+    @Value("${keycloak-ext.external.id:ais}")
+    protected String externalIdmSource;
+
+    @Value("${keycloak-ext.syncGroupAs:organization}")
+    protected String syncGroupAs;
+    
+    protected boolean syncGroupAsOrganization() {
+    	return !this.syncGroupAsCapability();
+    }
+    
+    protected boolean syncGroupAsCapability() {
+    	return this.syncGroupAs != null && this.syncGroupAs.toLowerCase().startsWith("cap");
+    }
+    
+    /**
+     * This method validates that the user exists, if not, it creates the
+     * missing user.  Without this functionality, SSO straight up fails in APS.
+     */
+    @Override
+    public void preAuthenticate(Authentication auth) throws AuthenticationException { 
+    	Long tenantId = this.tenantFinderService.findTenantId();
+		this.logger.trace("Tenant ID: {}", tenantId);
+		
+    	User user = this.findUser(auth, tenantId);
+    	if (user == null) {
+    		if (this.createMissingUser) {
+	    		this.logger.debug("User does not yet exist; creating the user: {}", auth.getName());
+	    		
+	    		user = this.createUser(auth, tenantId);
+	    		this.logger.debug("Created user: {} => {}", user.getId(), user.getExternalId());
+	    		
+	    		if (this.clearNewUserDefaultGroups) {
+		    		this.logger.debug("Clearing groups: {}", user.getId());
+	    			// fetch and remove default groups
+	    			user = this.userService.getUser(user.getId(), true);
+	    			for (Group group : user.getGroups())
+	    				this.groupService.deleteUserFromGroup(group, user);
+	    		}
+    		} else {
+    			this.logger.info("User does not exist; user creation is disabled: {}", auth.getName());
+    		}
+    	} else if (user.getExternalOriginalSrc() == null || user.getExternalOriginalSrc().length() == 0) {
+    		this.logger.debug("User exists, but not created by an external source: {}", auth.getName());
+    		this.logger.info("Linking user '{}' with external IDM '{}'", auth.getName(), this.externalIdmSource);
+    		user.setExternalId(auth.getName());
+    		user.setExternalOriginalSrc(this.externalIdmSource);
+    		this.userService.save(user);
+    	} else if (!this.externalIdmSource.equals(user.getExternalOriginalSrc())) {
+    		this.logger.debug("User '{}' exists, but created by another source: {}", auth.getName(), user.getExternalOriginalSrc());
+    	} else {
+    		this.logger.trace("User already exists: {}", auth.getName());
+    	}
+    }
+    
+    /**
+     * This method validates that the groups exist, if not, it creates the
+     * missing ones.  Without this functionality, SSO works, but the user's
+     * authorities are not synchronized.
+     */
+    @Override
+    public void postAuthenticate(Authentication auth) throws AuthenticationException {
+    	Long tenantId = this.tenantFinderService.findTenantId();
+    	User user = this.findUser(auth, tenantId);
+		this.logger.debug("Inspecting user: {} => {}", user.getId(), user.getExternalId());
+		
+    	this.syncUserRoles(user, auth, tenantId);
+    }
+    
+    private User findUser(Authentication auth, Long tenantId) {
+    	String email = auth.getName();
+		
+    	User user = this.userService.findUserByEmailAndTenantId(email, tenantId);
+    	if (user == null) {
+    		this.logger.debug("User does not exist in tenant; trying tenant-less lookup: {}", email);
+    		user = this.userService.findUserByEmail(email);
+    	} else {
+    		this.logger.trace("Found user: {}", user.getId());
+    	}
+    	
+    	return user;
+    }
+    
+    private User createUser(Authentication auth, Long tenantId) {
+		AccessToken atoken = this.getKeycloakAccessToken(auth);
+		if (atoken == null) {
+    		this.logger.debug("The keycloak access token could not be found; using email to determine names: {}", auth.getName());
+    		Matcher emailNamesMatcher = this.emailNamesPattern.matcher(auth.getName());
+    		if (!emailNamesMatcher.matches()) {
+        		this.logger.warn("The email address could not be parsed for names: {}", auth.getName());
+    			return this.userService.createNewUserFromExternalStore(auth.getName(), "Unknown", "Person", tenantId, auth.getName(), this.externalIdmSource, new Date());
+    		} else {
+    			String firstName = StringUtils.capitalize(emailNamesMatcher.group(1));
+    			String lastName = StringUtils.capitalize(emailNamesMatcher.group(2));
+    			return this.userService.createNewUserFromExternalStore(auth.getName(), firstName, lastName, tenantId, auth.getName(), this.externalIdmSource, new Date());
+    		}
+		} else {
+			return this.userService.createNewUserFromExternalStore(auth.getName(), atoken.getGivenName(), atoken.getFamilyName(), tenantId, auth.getName(), this.externalIdmSource, new Date());
+		}
+    }
+
+    private void syncUserRoles(User user, Authentication auth, Long tenantId) {
+    	Map<String, String> roles = this.getKeycloakRoles(auth);
+    	if (roles == null) {
+    		this.logger.debug("The user roles could not be determined; skipping sync: {}", user.getEmail());
+    		return;
+    	}
+    	
+    	boolean syncAsOrg = this.syncGroupAsOrganization();
+    	
+		// check Activiti groups
+		User userWithGroups = this.userService.getUser(user.getId(), true);
+		for (Group group : userWithGroups.getGroups()) {
+			if (group.getExternalId() == null && !this.syncInternalGroups)
+				continue;
+			
+			this.logger.trace("Inspecting group: {} => {} ({})", group.getId(), group.getName(), group.getExternalId());
+			
+			if (group.getExternalId() != null && this.removeMapEntriesByValue(roles, this.apsGroupExternalIdToKeycloakRole(group.getExternalId()))) {
+				if (group.getTenantId() == null) {
+					// fix stray groups
+					group.setTenantId(tenantId);
+					group.setLastUpdate(new Date());
+					this.groupService.save(group);
+				}
+				// role already existed and the user is already a member
+			} else if (group.getExternalId() == null && roles.remove(this.apsGroupNameToKeycloakRole(group.getName())) != null) {
+				// register the group as external
+				group.setExternalId(this.keycloakRoleToApsGroupExternalId(this.apsGroupNameToKeycloakRole(group.getName())));
+				group.setLastUpdate(new Date());
+				this.groupService.save(group);
+				// internal role already existed and the user is already a member
+			} else {
+				// at this point, we have a group that the user does not have a corresponding role for
+				if (this.syncGroupRemove) {
+					this.logger.trace("Removing user '{}' from group '{}'", user.getExternalId(), group.getName());
+					this.groupService.deleteUserFromGroup(group, userWithGroups);
+				} else {
+					this.logger.debug("User/group membership sync disabled; not removing user from group: {} => {}", user.getExternalId(), group.getName());
+				}
+			}
+		}
+		
+		// add remaining authorities into Activiti
+		for (Entry<String, String> role : roles.entrySet()) {
+			this.logger.trace("Syncing group membership: {}", role);
+			
+			Group group;
+			try {
+				group = this.groupService.getGroupByExternalIdAndTenantId(this.keycloakRoleToApsGroupExternalId(role.getKey()), tenantId);
+			} catch (NonUniqueResultException nure) {
+				this.logger.warn("There are multiple groups with the external ID; not adding user to group: {}", role.getKey());
+				continue;
+			}
+
+			if (group == null && this.syncInternalGroups) {
+				List<Group> groups = this.groupService.getGroupByNameAndTenantId(this.keycloakRoleToApsGroupName(role.getValue()), tenantId);
+				if (groups.size() > 1) {
+					this.logger.warn("There are multiple groups with the same name; not adding user to group: {}", role.getValue());
+					continue;
+				} else if (groups.size() == 1) {
+					group = groups.iterator().next();
+					this.logger.debug("Found an internal group; registering as external: {}", group.getName());
+					group.setExternalId(this.keycloakRoleToApsGroupExternalId(role.getKey()));
+					group.setLastSyncTimeStamp(new Date());
+					group.setLastUpdate(new Date());
+					this.groupService.save(group);
+				}
+			}
+			
+			if (group == null) {
+				if (this.createMissingGroup) {
+					this.logger.trace("Creating new group for role: {}", role);
+					String name = this.keycloakRoleToApsGroupName(role.getValue());
+					String externalId = this.keycloakRoleToApsGroupExternalId(role.getKey());
+					int type = syncAsOrg ? Group.TYPE_FUNCTIONAL_GROUP : Group.TYPE_SYSTEM_GROUP;
+					this.logger.trace("Creating new group: {} ({}) [type: {}]", name, externalId, type);
+					group = this.groupService.createGroupFromExternalStore(name, tenantId, type, null, externalId, new Date());
+				} else {
+	    			this.logger.debug("Group does not exist; group creation is disabled: {}", role);
+				}
+			}
+
+			if (group != null && this.syncGroupAdd) {
+				this.logger.trace("Adding user '{}' to group '{}'", user.getExternalId(), group.getName());
+				this.groupService.addUserToGroup(group, userWithGroups);
+			} else {
+				this.logger.debug("User/group membership sync disabled; not adding user to group: {} => {}", user.getExternalId(), group.getName());
+			}
+		}
+    }
+    
+    private String keycloakRoleToApsGroupExternalId(String role) {
+    	return this.externalIdmSource + "_" + role;
+    }
+    
+    private String apsGroupExternalIdToKeycloakRole(String externalId) {
+    	int underscorePos = externalId.indexOf('_');
+    	return underscorePos < 0 ? externalId : externalId.substring(underscorePos + 1);
+    }
+    
+    private String keycloakRoleToApsGroupName(String role) {
+    	return role;
+    }
+    
+    private String apsGroupNameToKeycloakRole(String externalId) {
+    	return externalId;
+    }
+    
+}

src/main/java/com/inteligr8/activiti/keycloak/KeycloakActivitiEngineAuthenticator.java

@@ -1,7 +1,8 @@
-package com.inteligr8.activiti.ais;
+package com.inteligr8.activiti.keycloak;
 
 import java.util.List;
-import java.util.Set;
+import java.util.Map;
+import java.util.Map.Entry;
 
 import org.activiti.engine.IdentityService;
 import org.activiti.engine.identity.Group;
@@ -21,30 +22,18 @@ import org.springframework.stereotype.Component;
  * 
  * @author brian.long@yudrio.com
  */
-@Component("activiti.authenticator")
+@Component("keycloak-ext.activiti-engine.authenticator")
 @Lazy
-public class IdentityServiceActivitiEngineAuthenticator extends AbstractIdentityServiceActivitiAuthenticator implements Authenticator {
+public class KeycloakActivitiEngineAuthenticator extends AbstractKeycloakActivitiAuthenticator {
 	
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
     
-    @Value("${keycloak-ext.createMissingUser:true}")
-    private boolean createMissingUser;
-
-    @Value("${keycloak-ext.clearNewUserGroups:true}")
-    private boolean clearNewUserGroups;
-
-    @Value("${keycloak-ext.createMissingGroup:true}")
-    private boolean createMissingGroup;
-
-    @Value("${keycloak-ext.syncGroupAdd:true}")
-    private boolean syncGroupAdd;
-
-    @Value("${keycloak-ext.syncGroupRemove:true}")
-    private boolean syncGroupRemove;
-    
     @Autowired
     private IdentityService identityService;
     
+    @Value("${keycloak-ext.group.prefix:KEYCLOAK_}")
+    private String groupPrefix;
+
     /**
      * This method validates that the user exists, if not, it creates the
      * missing user.  Without this functionality, SSO straight up fails.
@@ -59,7 +48,7 @@ public class IdentityServiceActivitiEngineAuthenticator extends AbstractIdentity
         		user = this.createUser(auth);
 	    		this.logger.debug("Created user: {} => {}", user.getId(), user.getEmail());
         		
-        		if (this.clearNewUserGroups) {
+        		if (this.clearNewUserDefaultGroups) {
 		    		this.logger.debug("Clearing groups: {}", user.getId());
 	        		List<Group> groups = this.identityService.createGroupQuery()
 	        				.groupMember(user.getId())
@@ -83,7 +72,7 @@ public class IdentityServiceActivitiEngineAuthenticator extends AbstractIdentity
     	User user = this.findUser(auth);
 		this.logger.debug("Inspecting user: {} => {}", user.getId(), user.getEmail());
 		
-    	this.syncUserAuthorities(user, auth);
+    	this.syncUserRoles(user, auth);
     }
     
     private User findUser(Authentication auth) {
@@ -103,9 +92,12 @@ public class IdentityServiceActivitiEngineAuthenticator extends AbstractIdentity
     	return user;
     }
 
-    private void syncUserAuthorities(User user, Authentication auth) {
-    	Set<String> authorities = this.toSet(auth.getAuthorities());
-		this.logger.debug("OIDC authorities: {}", authorities);
+    private void syncUserRoles(User user, Authentication auth) {
+    	Map<String, String> roles = this.getKeycloakRoles(auth);
+    	if (roles == null) {
+    		this.logger.debug("The user roles could not be determined; skipping sync: {}", user.getEmail());
+    		return;
+    	}
     	
 		// check Activiti groups
     	List<Group> groups = this.identityService.createGroupQuery()
@@ -113,8 +105,11 @@ public class IdentityServiceActivitiEngineAuthenticator extends AbstractIdentity
     			.list();
 		this.logger.debug("User is currently a member of {} groups", groups.size());
     	for (Group group : groups) {
+    		if (!group.getId().startsWith(this.groupPrefix) && this.syncInternalGroups)
+    			continue;
+    		
     		this.logger.trace("Inspecting group: {} => {} ({})", group.getId(), group.getName(), group.getType());
-    		if (authorities.remove(group.getName())) {
+    		if (roles.remove(this.activitiGroupIdToKeycloakRole(group.getId())) != null) {
         		this.logger.trace("Group and membership already exist: {} => {}", user.getEmail(), group.getName());
     			// already a member of the group
     		} else {
@@ -127,23 +122,23 @@ public class IdentityServiceActivitiEngineAuthenticator extends AbstractIdentity
     		}
     	}
 
-		this.logger.debug("Unaddressed OIDC authorities: {}", authorities);
+		this.logger.debug("Unaddressed OIDC roles: {}", roles);
     	
-    	// check remainder/unaddressed authorities
-    	for (String authority : authorities) {
-    		this.logger.trace("Inspecting authority: {}", authority);
+    	// check remainder/unaddressed roles
+    	for (Entry<String, String> role : roles.entrySet()) {
+    		this.logger.trace("Inspecting role: {}", role);
     		
     		Group group = this.identityService.createGroupQuery()
-    				.groupName(authority)
+    				.groupId(this.keycloakRoleToActivitiGroupId(role.getKey()))
     				.singleResult();
     		if (group == null) {
     			if (this.createMissingGroup) {
 	        		this.logger.trace("Group does not exist; creating one");
-	        		group = this.identityService.newGroup(authority);
-	        		group.setName(authority);
+	        		group = this.identityService.newGroup(this.keycloakRoleToActivitiGroupId(role.getKey()));
+	        		group.setName(role.getValue());
 	        		this.identityService.saveGroup(group);
     			} else {
-        			this.logger.info("User does not exist; user creation is disabled: {}", auth.getName());
+        			this.logger.info("Group does not exist; group creation is disabled: {}", role.getKey());
     			}
     		}
 
@@ -156,4 +151,12 @@ public class IdentityServiceActivitiEngineAuthenticator extends AbstractIdentity
     	}
     }
     
+    private String keycloakRoleToActivitiGroupId(String role) {
+    	return this.groupPrefix + role;
+    }
+    
+    private String activitiGroupIdToKeycloakRole(String groupId) {
+    	return groupId.startsWith(this.groupPrefix) ? groupId.substring(this.groupPrefix.length()) : groupId;
+    }
+    
 }

src/main/java/com/inteligr8/activiti/keycloak/KeycloakSecurityConfigurationAdapter.java

@@ -0,0 +1,67 @@
+package com.inteligr8.activiti.keycloak;
+
+import org.keycloak.adapters.springsecurity.authentication.KeycloakAuthenticationProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.springframework.security.core.authority.mapping.SimpleAuthorityMapper;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.stereotype.Component;
+
+import com.inteligr8.activiti.ActivitiSecurityConfigAdapter;
+import com.inteligr8.activiti.auth.Authenticator;
+import com.inteligr8.activiti.auth.InterceptingAuthenticationProvider;
+
+/**
+ * This class/bean injects a custom keycloak authentication provider into the
+ * security configuration.
+ * 
+ * @author brian@inteligr8.com
+ * @see org.keycloak.adapters.springsecurity.authentication.KeycloakAuthenticationProvider
+ */
+@Component
+public class KeycloakSecurityConfigurationAdapter implements ActivitiSecurityConfigAdapter {
+	
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    
+    @Value("${keycloak-ext.keycloak.enabled:false}")
+    private boolean enabled;
+
+	// this assures execution before the OOTB impl (-10 < 0)
+    @Value("${keycloak-ext.keycloak.priority:-5}")
+    private int priority;
+    
+    @Autowired
+    @Qualifier("keycloak-ext.activiti-app.authenticator")
+    private Authenticator authenticator;
+    
+    protected Authenticator getAuthenticator() {
+		return this.authenticator;
+	}
+    
+    @Override
+    public boolean isEnabled() {
+    	return this.enabled;
+    }
+    
+    @Override
+    public int getPriority() {
+    	return this.priority;
+    }
+	
+	@Override
+	public void configureGlobal(AuthenticationManagerBuilder auth, UserDetailsService userDetailsService) {
+		this.logger.trace("configureGlobal()");
+		
+		this.logger.info("Using Keycloak authentication extension, featuring creation of missing users and authority synchronization");
+		
+		KeycloakAuthenticationProvider provider = new KeycloakAuthenticationProvider();
+		provider.setGrantedAuthoritiesMapper(new SimpleAuthorityMapper());
+
+		auth.authenticationProvider(new InterceptingAuthenticationProvider(provider, this.getAuthenticator()));
+	}
+
+}