hadoop Credentials 源码
haddop Credentials 代码
文件路径：/hadoop-common-project/hadoop-nfs/src/main/java/org/apache/hadoop/oncrpc/security/Credentials.java
/**
* 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 org.apache.hadoop.classification.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;
}
}
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