com.cloudera.recordservice.mr.security.TokenUtils.java Source code

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Here is the source code for com.cloudera.recordservice.mr.security.TokenUtils.java

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// Copyright 2015 Cloudera Inc.
//
// Licensed 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 com.cloudera.recordservice.mr.security;

import java.io.IOException;

import org.apache.commons.codec.binary.Base64;
import org.apache.hadoop.security.token.Token;

import com.cloudera.recordservice.core.DelegationToken;

/**
 * Utilities to handle token serialization/deserialization.
 */
public class TokenUtils {
    /**
     * Serializes a token to TDelegationToken.
     */
    public static DelegationToken toDelegationToken(Token<DelegationTokenIdentifier> t) throws IOException {
        if (t == null)
            return null;
        return new DelegationToken(encodeAsString(t.getIdentifier()), encodeAsString(t.getPassword()),
                t.encodeToUrlString().getBytes());
    }

    /**
     * Deserializes a token from TDelegationToken
     */
    public static Token<DelegationTokenIdentifier> fromTDelegationToken(DelegationToken t) throws IOException {
        Token<DelegationTokenIdentifier> token = new Token<DelegationTokenIdentifier>();
        token.decodeFromUrlString(new String(t.token));
        return token;
    }

    /**
     * Encodes the byte array as a string.
     */
    public static String encodeAsString(byte[] v) {
        return new String(Base64.encodeBase64(v));
    }
}