| /** |
| * 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.oncrpc.security; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.apache.hadoop.oncrpc.XDR; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Base class for all credentials. Currently we only support 3 different types |
| * of auth flavors: AUTH_NONE, AUTH_SYS, and RPCSEC_GSS. |
| */ |
| public abstract class Credentials extends RpcAuthInfo { |
| public static final Logger LOG = LoggerFactory.getLogger(Credentials.class); |
| |
| public static Credentials readFlavorAndCredentials(XDR xdr) { |
| AuthFlavor flavor = AuthFlavor.fromValue(xdr.readInt()); |
| final Credentials credentials; |
| if(flavor == AuthFlavor.AUTH_NONE) { |
| credentials = new CredentialsNone(); |
| } else if(flavor == AuthFlavor.AUTH_SYS) { |
| credentials = new CredentialsSys(); |
| } else if(flavor == AuthFlavor.RPCSEC_GSS) { |
| credentials = new CredentialsGSS(); |
| } else { |
| throw new UnsupportedOperationException("Unsupported Credentials Flavor " |
| + flavor); |
| } |
| credentials.read(xdr); |
| return credentials; |
| } |
| |
| /** |
| * Write AuthFlavor and the credentials to the XDR |
| * @param cred credentials |
| * @param xdr XDR message |
| */ |
| public static void writeFlavorAndCredentials(Credentials cred, XDR xdr) { |
| if (cred instanceof CredentialsNone) { |
| xdr.writeInt(AuthFlavor.AUTH_NONE.getValue()); |
| } else if (cred instanceof CredentialsSys) { |
| xdr.writeInt(AuthFlavor.AUTH_SYS.getValue()); |
| } else if (cred instanceof CredentialsGSS) { |
| xdr.writeInt(AuthFlavor.RPCSEC_GSS.getValue()); |
| } else { |
| throw new UnsupportedOperationException("Cannot recognize the verifier"); |
| } |
| cred.write(xdr); |
| } |
| |
| protected int mCredentialsLength; |
| |
| protected Credentials(AuthFlavor flavor) { |
| super(flavor); |
| } |
| |
| @VisibleForTesting |
| int getCredentialLength() { |
| return mCredentialsLength; |
| } |
| } |