content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.cassandra.cql3.statements;
  
  import org.apache.cassandra.audit.AuditLogContext;
  import org.apache.cassandra.audit.AuditLogEntryType;
  import org.apache.cassandra.auth.Permission;
  import org.apache.cassandra.auth.RoleResource;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.exceptions.InvalidRequestException;
  import org.apache.cassandra.exceptions.RequestExecutionException;
  import org.apache.cassandra.exceptions.RequestValidationException;
  import org.apache.cassandra.service.ClientState;
  import org.apache.cassandra.transport.messages.ResultMessage;
  
  /**
   * Cqlsh statement to add identity into roles_to_identity table for storing authorized identities for mTLS connections.
   * Performs some checks before adding the identity to roles table.
   *
   * EX: ADD IDENTITY 'testIdentity' TO ROLE 'testRole'
   */
  public class AddIdentityStatement extends AuthenticationStatement
  {
      final String identity;
      final String role;
      final boolean ifNotExists;
  
      public AddIdentityStatement(String identity, String role, boolean ifNotExists)
      {
          this.role = role;
          this.identity = identity;
          this.ifNotExists = ifNotExists;
      }
  
      @Override
      public void authorize(ClientState state)
      {
          checkPermission(state, Permission.CREATE, state.getUser().getPrimaryRole());
      }
  
      @Override
      public void validate(ClientState state)
      {
          state.ensureNotAnonymous();
  
          if (!DatabaseDescriptor.getRoleManager().isExistingRole(RoleResource.role(role)))
          {
              throw new InvalidRequestException(String.format("Can not add identity for non-existent role '%s'", role));
          }
  
          if (!ifNotExists && DatabaseDescriptor.getRoleManager().isExistingIdentity(identity))
              throw new InvalidRequestException(String.format("%s already exists", identity));
      }
  
      @Override
      public AuditLogContext getAuditLogContext()
      {
          return new AuditLogContext(AuditLogEntryType.CREATE_IDENTITY);
      }
  
      @Override
      public ResultMessage execute(ClientState state) throws RequestExecutionException, RequestValidationException
      {
          if(!ifNotExists || !DatabaseDescriptor.getRoleManager().isExistingIdentity(identity))
          {
              DatabaseDescriptor.getRoleManager().addIdentity(identity, role);
          }
          return null;
      }
  }
  