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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* 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.audit;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.UUID;
import javax.annotation.Nullable;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.auth.AuthEvents;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.config.ParameterizedClass;
import org.apache.cassandra.cql3.CQLStatement;
import org.apache.cassandra.cql3.PasswordObfuscator;
import org.apache.cassandra.cql3.QueryEvents;
import org.apache.cassandra.cql3.QueryOptions;
import org.apache.cassandra.cql3.statements.BatchStatement;
import org.apache.cassandra.exceptions.AuthenticationException;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.exceptions.PreparedQueryNotFoundException;
import org.apache.cassandra.exceptions.SyntaxException;
import org.apache.cassandra.exceptions.UnauthorizedException;
import org.apache.cassandra.service.QueryState;
import org.apache.cassandra.transport.Message;
import org.apache.cassandra.transport.messages.ResultMessage;
import org.apache.cassandra.utils.FBUtilities;
/**
* Central location for managing the logging of client/user-initated actions (like queries, log in commands, and so on).
*
*/
public class AuditLogManager implements QueryEvents.Listener, AuthEvents.Listener
{
private static final Logger logger = LoggerFactory.getLogger(AuditLogManager.class);
public static final AuditLogManager instance = new AuditLogManager();
// auditLogger can write anywhere, as it's pluggable (logback, BinLog, DiagnosticEvents, etc ...)
private volatile IAuditLogger auditLogger;
private volatile AuditLogFilter filter;
private AuditLogManager()
{
final AuditLogOptions auditLogOptions = DatabaseDescriptor.getAuditLoggingOptions();
if (auditLogOptions.enabled)
{
logger.info("Audit logging is enabled.");
auditLogger = getAuditLogger(auditLogOptions.logger);
}
else
{
logger.debug("Audit logging is disabled.");
auditLogger = new NoOpAuditLogger(Collections.emptyMap());
}
filter = AuditLogFilter.create(auditLogOptions);
}
public void initialize()
{
if (DatabaseDescriptor.getAuditLoggingOptions().enabled)
registerAsListener();
}
private IAuditLogger getAuditLogger(ParameterizedClass logger) throws ConfigurationException
{
if (logger.class_name != null)
{
return FBUtilities.newAuditLogger(logger.class_name, logger.parameters == null ? Collections.emptyMap() : logger.parameters);
}
return FBUtilities.newAuditLogger(BinAuditLogger.class.getName(), Collections.emptyMap());
}
@VisibleForTesting
public IAuditLogger getLogger()
{
return auditLogger;
}
public boolean isEnabled()
{
return auditLogger.isEnabled();
}
/**
* Logs AudigLogEntry to standard audit logger
* @param logEntry AuditLogEntry to be logged
*/
private void log(AuditLogEntry logEntry)
{
if (!filter.isFiltered(logEntry))
{
auditLogger.log(logEntry);
}
}
private void log(AuditLogEntry logEntry, Exception e)
{
log(logEntry, e, null);
}
private void log(AuditLogEntry logEntry, Exception e, List queries)
{
AuditLogEntry.Builder builder = new AuditLogEntry.Builder(logEntry);
if (e instanceof UnauthorizedException)
{
builder.setType(AuditLogEntryType.UNAUTHORIZED_ATTEMPT);
}
else if (e instanceof AuthenticationException)
{
builder.setType(AuditLogEntryType.LOGIN_ERROR);
}
else
{
builder.setType(AuditLogEntryType.REQUEST_FAILURE);
}
builder.appendToOperation(obfuscatePasswordInformation(e, queries));
log(builder.build());
}
/**
* Disables AuditLog, designed to be invoked only via JMX/ Nodetool, not from anywhere else in the codepath.
*/
public synchronized void disableAuditLog()
{
unregisterAsListener();
IAuditLogger oldLogger = auditLogger;
auditLogger = new NoOpAuditLogger(Collections.emptyMap());
oldLogger.stop();
}
/**
* Enables AuditLog, designed to be invoked only via JMX/ Nodetool, not from anywhere else in the codepath.
* @param auditLogOptions AuditLogOptions to be used for enabling AuditLog
* @throws ConfigurationException It can throw configuration exception when provided logger class does not exist in the classpath
*/
public synchronized void enable(AuditLogOptions auditLogOptions) throws ConfigurationException
{
// always reload the filters
filter = AuditLogFilter.create(auditLogOptions);
// next, check to see if we're changing the logging implementation; if not, keep the same instance and bail.
// note: auditLogger should never be null
IAuditLogger oldLogger = auditLogger;
if (oldLogger.getClass().getSimpleName().equals(auditLogOptions.logger.class_name))
return;
auditLogger = getAuditLogger(auditLogOptions.logger);
// note that we might already be registered here and we rely on the fact that Query/AuthEvents have a Set of listeners
registerAsListener();
// ensure oldLogger's stop() is called after we swap it with new logger,
// otherwise, we might be calling log() on the stopped logger.
oldLogger.stop();
}
private void registerAsListener()
{
QueryEvents.instance.registerListener(this);
AuthEvents.instance.registerListener(this);
}
private void unregisterAsListener()
{
QueryEvents.instance.unregisterListener(this);
AuthEvents.instance.unregisterListener(this);
}
public void querySuccess(CQLStatement statement, String query, QueryOptions options, QueryState state, long queryTime, Message.Response response)
{
AuditLogEntry entry = new AuditLogEntry.Builder(state).setType(statement.getAuditLogContext().auditLogEntryType)
.setOperation(query)
.setTimestamp(queryTime)
.setScope(statement)
.setKeyspace(state, statement)
.setOptions(options)
.build();
log(entry);
}
public void queryFailure(CQLStatement stmt, String query, QueryOptions options, QueryState state, Exception cause)
{
AuditLogEntry entry = new AuditLogEntry.Builder(state).setOperation(query)
.setOptions(options)
.build();
log(entry, cause, query == null ? null : ImmutableList.of(query));
}
public void executeSuccess(CQLStatement statement, String query, QueryOptions options, QueryState state, long queryTime, Message.Response response)
{
AuditLogEntry entry = new AuditLogEntry.Builder(state).setType(statement.getAuditLogContext().auditLogEntryType)
.setOperation(query)
.setTimestamp(queryTime)
.setScope(statement)
.setKeyspace(state, statement)
.setOptions(options)
.build();
log(entry);
}
public void executeFailure(CQLStatement statement, String query, QueryOptions options, QueryState state, Exception cause)
{
AuditLogEntry entry = null;
if (cause instanceof PreparedQueryNotFoundException)
{
entry = new AuditLogEntry.Builder(state).setOperation(query == null ? "null" : query)
.setOptions(options)
.build();
}
else if (statement != null)
{
entry = new AuditLogEntry.Builder(state).setOperation(query == null ? statement.toString() : query)
.setType(statement.getAuditLogContext().auditLogEntryType)
.setScope(statement)
.setKeyspace(state, statement)
.setOptions(options)
.build();
}
if (entry != null)
log(entry, cause, query == null ? null : ImmutableList.of(query));
}
public void batchSuccess(BatchStatement.Type batchType, List statements, List queries, List> values, QueryOptions options, QueryState state, long queryTime, Message.Response response)
{
List entries = buildEntriesForBatch(statements, queries, state, options, queryTime);
for (AuditLogEntry auditLogEntry : entries)
{
log(auditLogEntry);
}
}
public void batchFailure(BatchStatement.Type batchType, List statements, List queries, List> values, QueryOptions options, QueryState state, Exception cause)
{
String auditMessage = String.format("BATCH of %d statements at consistency %s", statements.size(), options.getConsistency());
AuditLogEntry entry = new AuditLogEntry.Builder(state).setOperation(auditMessage)
.setOptions(options)
.setType(AuditLogEntryType.BATCH)
.build();
log(entry, cause, queries);
}
private static List buildEntriesForBatch(List statements, List queries, QueryState state, QueryOptions options, long queryStartTimeMillis)
{
List auditLogEntries = new ArrayList<>(statements.size() + 1);
UUID batchId = UUID.randomUUID();
String queryString = String.format("BatchId:[%s] - BATCH of [%d] statements", batchId, statements.size());
AuditLogEntry entry = new AuditLogEntry.Builder(state)
.setOperation(queryString)
.setOptions(options)
.setTimestamp(queryStartTimeMillis)
.setBatch(batchId)
.setType(AuditLogEntryType.BATCH)
.build();
auditLogEntries.add(entry);
for (int i = 0; i < statements.size(); i++)
{
CQLStatement statement = statements.get(i);
entry = new AuditLogEntry.Builder(state)
.setType(statement.getAuditLogContext().auditLogEntryType)
.setOperation(queries.get(i))
.setTimestamp(queryStartTimeMillis)
.setScope(statement)
.setKeyspace(state, statement)
.setOptions(options)
.setBatch(batchId)
.build();
auditLogEntries.add(entry);
}
return auditLogEntries;
}
public void prepareSuccess(CQLStatement statement, String query, QueryState state, long queryTime, ResultMessage.Prepared response)
{
AuditLogEntry entry = new AuditLogEntry.Builder(state).setOperation(query)
.setType(AuditLogEntryType.PREPARE_STATEMENT)
.setScope(statement)
.setKeyspace(statement)
.build();
log(entry);
}
public void prepareFailure(@Nullable CQLStatement stmt, @Nullable String query, QueryState state, Exception cause)
{
AuditLogEntry entry = new AuditLogEntry.Builder(state).setOperation(query)
// .setKeyspace(keyspace) // todo: do we need this? very much special case compared to the others
.setType(AuditLogEntryType.PREPARE_STATEMENT)
.build();
log(entry, cause);
}
public void authSuccess(QueryState state)
{
AuditLogEntry entry = new AuditLogEntry.Builder(state).setOperation("LOGIN SUCCESSFUL")
.setType(AuditLogEntryType.LOGIN_SUCCESS)
.build();
log(entry);
}
public void authFailure(QueryState state, Exception cause)
{
AuditLogEntry entry = new AuditLogEntry.Builder(state).setOperation("LOGIN FAILURE")
.setType(AuditLogEntryType.LOGIN_ERROR)
.build();
log(entry, cause);
}
private String obfuscatePasswordInformation(Exception e, List queries)
{
// A syntax error may reveal the password in the form of 'line 1:33 mismatched input 'secret_password''
if (e instanceof SyntaxException && queries != null && !queries.isEmpty())
{
for (String query : queries)
{
if (query.toLowerCase().contains(PasswordObfuscator.PASSWORD_TOKEN))
return "Syntax Exception. Obscured for security reasons.";
}
}
return PasswordObfuscator.obfuscate(e.getMessage());
}
}
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