// --- BEGIN COPYRIGHT BLOCK ---
// This program 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; version 2 of the License.
//
// This program 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 this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmscore.security;

import org.mozilla.jss.util.Password;
import org.mozilla.jss.util.PasswordCallback;

public class PWUtil {
    public static Password
            readPasswordFromStream()
                    throws PasswordCallback.GiveUpException {

        StringBuffer buf = new StringBuffer();
        String passwordString = new String();
        int c;

        try {
            // System.out.println( "about to do read" );
            try {
                while ((c = System.in.read()) != -1) {
                    char ch = (char) c;

                    // System.out.println( "read [" + ch + "]" );
                    // System.out.println( "char is [" + ch + "]" );
                    if (ch != '\r') {
                        if (ch != '\n') {
                            buf.append(ch);
                        } else {
                            passwordString = buf.toString();
                            buf.setLength(0);
                            break;
                        }
                    }
                }
            } catch (Exception e) {
                System.out.println("READ EXCEPTION");
            }

            // memory problem?
            //      String passwordString = in.readLine();
            //            System.out.println( "done read" );
            //            System.out.println( " password recieved is ["
            //                              + passwordString + "]" );
            if (passwordString == null) {
                throw new PasswordCallback.GiveUpException();
            }

            if (passwordString.equals("")) {
                throw new PasswordCallback.GiveUpException();
            }

            // System.out.println( "returning pw" );
            return (new Password(passwordString.toCharArray()));
        } catch (Exception e) {
            throw new PasswordCallback.GiveUpException();
        }
    }
}