/* ====================================================================
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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 HH.WMS.Utils.NPOI.Util;
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/**
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* Title: FILESHARING
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* Description: stores the encrypted Readonly for a workbook (Write protect)
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* This functionality Is accessed from the options dialog box available when performing 'Save As'.<p/>
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* REFERENCE: PG 314 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<p/>
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* @author Andrew C. Oliver (acoliver at apache dot org)
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*/
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public class FileSharingRecord : StandardRecord
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{
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public const short sid = 0x5b;
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private short field_1_Readonly;
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private short field_2_password;
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private byte field_3_username_unicode_options;
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private String field_3_username_value;
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public FileSharingRecord() { }
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/**
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* Constructs a FileSharing 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 FileSharingRecord(RecordInputStream in1)
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{
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field_1_Readonly = in1.ReadShort();
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field_2_password = in1.ReadShort();
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int nameLen = in1.ReadShort();
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if (nameLen > 0)
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{
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// TODO - Current examples(3) from junits only have zero Length username.
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field_3_username_unicode_options = (byte)in1.ReadByte();
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field_3_username_value = in1.ReadCompressedUnicode(nameLen);
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}
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else
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{
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field_3_username_value = "";
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}
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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 Readonly
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*
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* @return short representing if this Is Read only (1 = true)
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*/
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public short ReadOnly
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{
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get
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{
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return field_1_Readonly;
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}
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set { field_1_Readonly = value; }
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}
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/**
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* @returns password hashed with hashPassword() (very lame)
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*/
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public short Password
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{
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get
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{
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return field_2_password;
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}
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set { field_2_password = value; }
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}
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/**
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* @returns username of the user that Created the file
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*/
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public String Username
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{
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get { return field_3_username_value; }
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set { field_3_username_value = 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("[FILESHARING]\n");
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buffer.Append(" .Readonly = ")
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.Append(ReadOnly == 1 ? "true" : "false").Append("\n");
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buffer.Append(" .password = ")
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.Append(StringUtil.ToHexString(Password)).Append("\n");
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buffer.Append(" .username = ")
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.Append(Username).Append("\n");
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buffer.Append("[/FILESHARING]\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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// TODO - junit
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out1.WriteShort(ReadOnly);
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out1.WriteShort(Password);
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out1.WriteShort(field_3_username_value.Length);
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if (field_3_username_value.Length > 0)
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{
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out1.WriteByte(field_3_username_unicode_options);
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StringUtil.PutCompressedUnicode(Username, out1);
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}
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}
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protected override int DataSize
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{
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get
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{
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int nameLen = field_3_username_value.Length;
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if (nameLen < 1)
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{
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return 6;
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}
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return 7 + nameLen;
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}
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}
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public override short Sid
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{
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get
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{
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return sid;
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}
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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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FileSharingRecord Clone = new FileSharingRecord();
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Clone.ReadOnly = field_1_Readonly;
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Clone.Password = field_2_password;
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Clone.Username = field_3_username_value;
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return Clone;
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}
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}
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}
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