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/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) Under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for Additional information regarding copyright ownership.
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The ASF licenses this file to You Under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed Under the License is distributed on an "AS Is" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations Under the License.
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==================================================================== */
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namespace HH.WMS.Utils.NPOI.HSSF.Record
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{
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using System;
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using System.Text;
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using System.Collections;
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using HH.WMS.Utils.NPOI.Util;
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/**
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* Title: Password Record
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* Description: stores the encrypted password for a sheet or workbook (HSSF doesn't support encryption)
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* REFERENCE: PG 371 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)
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* @author Andrew C. Oliver (acoliver at apache dot org)
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* @version 2.0-pre
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*/
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public class PasswordRecord : StandardRecord
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{
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public const short sid = 0x13;
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private int field_1_password; // not sure why this Is only 2 bytes, but it Is... go figure
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public PasswordRecord(int password)
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{
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field_1_password = password;
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}
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/**
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* Constructs a Password record and Sets its fields appropriately.
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* @param in the RecordInputstream to Read the record from
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*/
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public PasswordRecord(RecordInputStream in1)
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{
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field_1_password = in1.ReadShort();
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}
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//this Is the world's lamest "security". thanks to Wouter van Vugt for making me
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//not have to try real hard. -ACO
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public static short HashPassword(String password)
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{
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byte[] passwordChars = Encoding.UTF8.GetBytes(password);
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int hash = 0;
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if (passwordChars.Length > 0)
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{
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int charIndex = passwordChars.Length;
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while (charIndex-- > 0)
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{
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hash = ((hash >> 14) & 0x01) | ((hash << 1) & 0x7fff);
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hash ^= passwordChars[charIndex];
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}
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// also hash with charcount
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hash = ((hash >> 14) & 0x01) | ((hash << 1) & 0x7fff);
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hash ^= passwordChars.Length;
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hash ^= (0x8000 | ('N' << 8) | 'K');
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}
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return (short)hash;
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}
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/**
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* Get the password
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*
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* @return short representing the password
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*/
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public int Password
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{
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get { return field_1_password; }
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set { field_1_password = value; }
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}
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public override String ToString()
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{
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StringBuilder buffer = new StringBuilder();
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buffer.Append("[PASSWORD]\n");
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buffer.Append(" .password = ")
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.Append(StringUtil.ToHexString(Password)).Append("\n");
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buffer.Append("[/PASSWORD]\n");
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return buffer.ToString();
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}
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public override void Serialize(ILittleEndianOutput out1)
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{
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out1.WriteShort(field_1_password);
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}
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protected override int DataSize
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{
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get { return 2; }
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}
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public override short Sid
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{
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get { return sid; }
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}
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/**
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* Clone this record.
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*/
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public override Object Clone()
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{
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return new PasswordRecord(field_1_password);
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}
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}
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}
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