com.jaeksoft.searchlib.util.PdfCrack.java Source code

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Here is the source code for com.jaeksoft.searchlib.util.PdfCrack.java

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/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2013 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * OpenSearchServer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OpenSearchServer. 
 *  If not, see <http://www.gnu.org/licenses/>.
 **/

package com.jaeksoft.searchlib.util;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.StringReader;

import org.apache.commons.exec.ExecuteException;

public class PdfCrack {

    private final static String FOUND_USER_PASSWORD = "found user-password: '";

    public final static String findPassword(String pdfCrackCommandLine, File file)
            throws ExecuteException, IOException {
        ByteArrayOutputStream out = null;
        ByteArrayOutputStream err = null;
        BufferedReader br = null;
        try {
            out = new ByteArrayOutputStream();
            err = new ByteArrayOutputStream();
            ExecuteUtils.command(null, pdfCrackCommandLine, null, false, out, err, 3600000L, "-f",
                    StringUtils.fastConcat("\"", file.getAbsolutePath(), "\""));
            br = new BufferedReader(new StringReader(out.toString()));
            String line;
            int start = FOUND_USER_PASSWORD.length();
            while ((line = br.readLine()) != null) {
                if (line.startsWith(FOUND_USER_PASSWORD)) {
                    int end = line.length() - 1;
                    return end == start ? "" : line.substring(start, end);
                }
            }
            return null;
        } finally {
            IOUtils.close(out, err, br);
        }
    }
}