org.apache.ranger.credentialapi.CredentialReader.java Source code

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Here is the source code for org.apache.ranger.credentialapi.CredentialReader.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
 * 
 * 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.ranger.credentialapi;

import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.alias.CredentialProvider;
import org.apache.hadoop.security.alias.CredentialProviderFactory;
import org.apache.hadoop.security.alias.JavaKeyStoreProvider;

public class CredentialReader {

    public static String getDecryptedString(String CrendentialProviderPath, String alias) {
        String credential = null;
        try {
            if (CrendentialProviderPath == null || alias == null || CrendentialProviderPath.trim().isEmpty()
                    || alias.trim().isEmpty()) {
                return null;
            }
            char[] pass = null;
            Configuration conf = new Configuration();
            String crendentialProviderPrefixJceks = JavaKeyStoreProvider.SCHEME_NAME + "://file";
            String crendentialProviderPrefixLocalJceks = "localjceks://file";
            crendentialProviderPrefixJceks = crendentialProviderPrefixJceks.toLowerCase();
            CrendentialProviderPath = CrendentialProviderPath.trim();
            alias = alias.trim();
            if (CrendentialProviderPath.toLowerCase().startsWith(crendentialProviderPrefixJceks)
                    || CrendentialProviderPath.toLowerCase().startsWith(crendentialProviderPrefixLocalJceks)) {
                conf.set(CredentialProviderFactory.CREDENTIAL_PROVIDER_PATH,
                        //UserProvider.SCHEME_NAME + ":///," +
                        CrendentialProviderPath);
            } else {
                if (CrendentialProviderPath.startsWith("/")) {
                    conf.set(CredentialProviderFactory.CREDENTIAL_PROVIDER_PATH,
                            //UserProvider.SCHEME_NAME + ":///," +
                            JavaKeyStoreProvider.SCHEME_NAME + "://file" + CrendentialProviderPath);
                } else {
                    conf.set(CredentialProviderFactory.CREDENTIAL_PROVIDER_PATH,
                            //UserProvider.SCHEME_NAME + ":///," +
                            JavaKeyStoreProvider.SCHEME_NAME + "://file/" + CrendentialProviderPath);
                }
            }
            List<CredentialProvider> providers = CredentialProviderFactory.getProviders(conf);
            List<String> aliasesList = new ArrayList<String>();
            CredentialProvider.CredentialEntry credEntry = null;
            for (CredentialProvider provider : providers) {
                //System.out.println("Credential Provider :" + provider);
                aliasesList = provider.getAliases();
                if (aliasesList != null && aliasesList.contains(alias.toLowerCase())) {
                    credEntry = null;
                    credEntry = provider.getCredentialEntry(alias);
                    pass = credEntry.getCredential();
                    if (pass != null && pass.length > 0) {
                        credential = String.valueOf(pass);
                        break;
                    }
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            credential = null;
        }
        return credential;
    }

    /*
    public static void main(String args[]) throws Exception{
       String keystoreFile =new String("/tmp/mykey3.jceks");  
       String password=CredentialReader.getDecryptedString(keystoreFile, "mykey3");
        System.out.println(password);
    }*/
}