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Server functionality for HBase
/*
* 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.hadoop.hbase.security.token;
import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;
import java.security.PrivilegedExceptionAction;
import com.google.protobuf.ByteString;
import com.google.protobuf.ServiceException;
import org.apache.hadoop.hbase.zookeeper.ZKWatcher;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.ipc.CoprocessorRpcChannel;
import org.apache.hadoop.hbase.protobuf.generated.AuthenticationProtos;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.zookeeper.ZKClusterId;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.security.token.Token;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.zookeeper.KeeperException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Utility methods for obtaining authentication tokens.
*/
@InterfaceAudience.Public
public class TokenUtil {
// This class is referenced indirectly by User out in common; instances are created by reflection
private static final Logger LOG = LoggerFactory.getLogger(TokenUtil.class);
// Set in TestTokenUtil via reflection
private static ServiceException injectedException;
private static void injectFault() throws ServiceException {
if (injectedException != null) {
throw injectedException;
}
}
/**
* Obtain and return an authentication token for the current user.
* @param conn The HBase cluster connection
* @throws IOException if a remote error or serialization problem occurs.
* @return the authentication token instance
*/
public static Token obtainToken(
Connection conn) throws IOException {
Table meta = null;
try {
injectFault();
meta = conn.getTable(TableName.META_TABLE_NAME);
CoprocessorRpcChannel rpcChannel = meta.coprocessorService(HConstants.EMPTY_START_ROW);
AuthenticationProtos.AuthenticationService.BlockingInterface service =
AuthenticationProtos.AuthenticationService.newBlockingStub(rpcChannel);
AuthenticationProtos.GetAuthenticationTokenResponse response = service.getAuthenticationToken(null,
AuthenticationProtos.GetAuthenticationTokenRequest.getDefaultInstance());
return toToken(response.getToken());
} catch (ServiceException se) {
throw ProtobufUtil.handleRemoteException(se);
} finally {
if (meta != null) {
meta.close();
}
}
}
/**
* Converts a Token instance (with embedded identifier) to the protobuf representation.
*
* @param token the Token instance to copy
* @return the protobuf Token message
*/
public static AuthenticationProtos.Token toToken(Token token) {
AuthenticationProtos.Token.Builder builder = AuthenticationProtos.Token.newBuilder();
builder.setIdentifier(ByteString.copyFrom(token.getIdentifier()));
builder.setPassword(ByteString.copyFrom(token.getPassword()));
if (token.getService() != null) {
builder.setService(ByteString.copyFromUtf8(token.getService().toString()));
}
return builder.build();
}
/**
* Obtain and return an authentication token for the current user.
* @param conn The HBase cluster connection
* @return the authentication token instance
*/
public static Token obtainToken(
final Connection conn, User user) throws IOException, InterruptedException {
return user.runAs(new PrivilegedExceptionAction>() {
@Override
public Token run() throws Exception {
return obtainToken(conn);
}
});
}
private static Text getClusterId(Token token)
throws IOException {
return token.getService() != null
? token.getService() : new Text("default");
}
/**
* Obtain an authentication token for the given user and add it to the
* user's credentials.
* @param conn The HBase cluster connection
* @param user The user for whom to obtain the token
* @throws IOException If making a remote call to the authentication service fails
* @throws InterruptedException If executing as the given user is interrupted
*/
public static void obtainAndCacheToken(final Connection conn,
User user)
throws IOException, InterruptedException {
try {
Token token = obtainToken(conn, user);
if (token == null) {
throw new IOException("No token returned for user " + user.getName());
}
if (LOG.isDebugEnabled()) {
LOG.debug("Obtained token " + token.getKind().toString() + " for user " +
user.getName());
}
user.addToken(token);
} catch (IOException ioe) {
throw ioe;
} catch (InterruptedException ie) {
throw ie;
} catch (RuntimeException re) {
throw re;
} catch (Exception e) {
throw new UndeclaredThrowableException(e,
"Unexpected exception obtaining token for user " + user.getName());
}
}
/**
* Obtain an authentication token on behalf of the given user and add it to
* the credentials for the given map reduce job.
* @param conn The HBase cluster connection
* @param user The user for whom to obtain the token
* @param job The job instance in which the token should be stored
* @throws IOException If making a remote call to the authentication service fails
* @throws InterruptedException If executing as the given user is interrupted
*/
public static void obtainTokenForJob(final Connection conn,
User user, Job job)
throws IOException, InterruptedException {
try {
Token token = obtainToken(conn, user);
if (token == null) {
throw new IOException("No token returned for user " + user.getName());
}
Text clusterId = getClusterId(token);
if (LOG.isDebugEnabled()) {
LOG.debug("Obtained token " + token.getKind().toString() + " for user " +
user.getName() + " on cluster " + clusterId.toString());
}
job.getCredentials().addToken(clusterId, token);
} catch (IOException ioe) {
throw ioe;
} catch (InterruptedException ie) {
throw ie;
} catch (RuntimeException re) {
throw re;
} catch (Exception e) {
throw new UndeclaredThrowableException(e,
"Unexpected exception obtaining token for user " + user.getName());
}
}
/**
* Obtain an authentication token on behalf of the given user and add it to
* the credentials for the given map reduce job.
* @param conn The HBase cluster connection
* @param user The user for whom to obtain the token
* @param job The job configuration in which the token should be stored
* @throws IOException If making a remote call to the authentication service fails
* @throws InterruptedException If executing as the given user is interrupted
*/
public static void obtainTokenForJob(final Connection conn, final JobConf job, User user)
throws IOException, InterruptedException {
try {
Token token = obtainToken(conn, user);
if (token == null) {
throw new IOException("No token returned for user " + user.getName());
}
Text clusterId = getClusterId(token);
if (LOG.isDebugEnabled()) {
LOG.debug("Obtained token " + token.getKind().toString() + " for user " +
user.getName() + " on cluster " + clusterId.toString());
}
job.getCredentials().addToken(clusterId, token);
} catch (IOException ioe) {
throw ioe;
} catch (InterruptedException ie) {
throw ie;
} catch (RuntimeException re) {
throw re;
} catch (Exception e) {
throw new UndeclaredThrowableException(e,
"Unexpected exception obtaining token for user "+user.getName());
}
}
/**
* Checks for an authentication token for the given user, obtaining a new token if necessary,
* and adds it to the credentials for the given map reduce job.
*
* @param conn The HBase cluster connection
* @param user The user for whom to obtain the token
* @param job The job configuration in which the token should be stored
* @throws IOException If making a remote call to the authentication service fails
* @throws InterruptedException If executing as the given user is interrupted
*/
public static void addTokenForJob(final Connection conn, final JobConf job, User user)
throws IOException, InterruptedException {
Token token = getAuthToken(conn.getConfiguration(), user);
if (token == null) {
token = obtainToken(conn, user);
}
job.getCredentials().addToken(token.getService(), token);
}
/**
* Checks for an authentication token for the given user, obtaining a new token if necessary,
* and adds it to the credentials for the given map reduce job.
*
* @param conn The HBase cluster connection
* @param user The user for whom to obtain the token
* @param job The job instance in which the token should be stored
* @throws IOException If making a remote call to the authentication service fails
* @throws InterruptedException If executing as the given user is interrupted
*/
public static void addTokenForJob(final Connection conn, User user, Job job)
throws IOException, InterruptedException {
Token token = getAuthToken(conn.getConfiguration(), user);
if (token == null) {
token = obtainToken(conn, user);
}
job.getCredentials().addToken(token.getService(), token);
}
/**
* Checks if an authentication tokens exists for the connected cluster,
* obtaining one if needed and adding it to the user's credentials.
*
* @param conn The HBase cluster connection
* @param user The user for whom to obtain the token
* @throws IOException If making a remote call to the authentication service fails
* @throws InterruptedException If executing as the given user is interrupted
* @return true if the token was added, false if it already existed
*/
public static boolean addTokenIfMissing(Connection conn, User user)
throws IOException, InterruptedException {
Token token = getAuthToken(conn.getConfiguration(), user);
if (token == null) {
token = obtainToken(conn, user);
user.getUGI().addToken(token.getService(), token);
return true;
}
return false;
}
/**
* Get the authentication token of the user for the cluster specified in the configuration
* @return null if the user does not have the token, otherwise the auth token for the cluster.
*/
private static Token getAuthToken(Configuration conf, User user)
throws IOException, InterruptedException {
ZKWatcher zkw = new ZKWatcher(conf, "TokenUtil-getAuthToken", null);
try {
String clusterId = ZKClusterId.readClusterIdZNode(zkw);
if (clusterId == null) {
throw new IOException("Failed to get cluster ID");
}
return new AuthenticationTokenSelector().selectToken(new Text(clusterId), user.getTokens());
} catch (KeeperException e) {
throw new IOException(e);
} finally {
zkw.close();
}
}
/**
* Converts a protobuf Token message back into a Token instance.
*
* @param proto the protobuf Token message
* @return the Token instance
*/
public static Token toToken(AuthenticationProtos.Token proto) {
return new Token<>(
proto.hasIdentifier() ? proto.getIdentifier().toByteArray() : null,
proto.hasPassword() ? proto.getPassword().toByteArray() : null,
AuthenticationTokenIdentifier.AUTH_TOKEN_TYPE,
proto.hasService() ? new Text(proto.getService().toStringUtf8()) : null);
}
}