com.buaa.cfs.common.oncrpc.security.Credentials.java Source code

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Here is the source code for com.buaa.cfs.common.oncrpc.security.Credentials.java

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/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 com.buaa.cfs.common.oncrpc.security;

import com.buaa.cfs.common.oncrpc.XDR;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * 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 Log LOG = LogFactory.getLog(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
     */
    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);
    }
}