/* ==================================================================== 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. ==================================================================== */ namespace HH.WMS.Utils.NPOI.HSSF.Record { using System; using System.Text; using HH.WMS.Utils.NPOI.Util; /** * Title: FILESHARING * Description: stores the encrypted Readonly for a workbook (Write protect) * This functionality Is accessed from the options dialog box available when performing 'Save As'.
* REFERENCE: PG 314 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2) * @author Andrew C. Oliver (acoliver at apache dot org) */ public class FileSharingRecord : StandardRecord { public const short sid = 0x5b; private short field_1_Readonly; private short field_2_password; private byte field_3_username_unicode_options; private String field_3_username_value; public FileSharingRecord() { } /** * Constructs a FileSharing record and Sets its fields appropriately. * @param in the RecordInputstream to Read the record from */ public FileSharingRecord(RecordInputStream in1) { field_1_Readonly = in1.ReadShort(); field_2_password = in1.ReadShort(); int nameLen = in1.ReadShort(); if (nameLen > 0) { // TODO - Current examples(3) from junits only have zero Length username. field_3_username_unicode_options = (byte)in1.ReadByte(); field_3_username_value = in1.ReadCompressedUnicode(nameLen); } else { field_3_username_value = ""; } } //this Is the world's lamest "security". thanks to Wouter van Vugt for making me //not have to try real hard. -ACO public static short HashPassword(String password) { byte[] passwordChars = Encoding.UTF8.GetBytes(password); int hash = 0; if (passwordChars.Length > 0) { int charIndex = passwordChars.Length; while (charIndex-- > 0) { hash = ((hash >> 14) & 0x01) | ((hash << 1) & 0x7fff); hash ^= passwordChars[charIndex]; } // also hash with charcount hash = ((hash >> 14) & 0x01) | ((hash << 1) & 0x7fff); hash ^= passwordChars.Length; hash ^= (0x8000 | ('N' << 8) | 'K'); } return (short)hash; } /** * Get the Readonly * * @return short representing if this Is Read only (1 = true) */ public short ReadOnly { get { return field_1_Readonly; } set { field_1_Readonly = value; } } /** * @returns password hashed with hashPassword() (very lame) */ public short Password { get { return field_2_password; } set { field_2_password = value; } } /** * @returns username of the user that Created the file */ public String Username { get { return field_3_username_value; } set { field_3_username_value = value; } } public override String ToString() { StringBuilder buffer = new StringBuilder(); buffer.Append("[FILESHARING]\n"); buffer.Append(" .Readonly = ") .Append(ReadOnly == 1 ? "true" : "false").Append("\n"); buffer.Append(" .password = ") .Append(StringUtil.ToHexString(Password)).Append("\n"); buffer.Append(" .username = ") .Append(Username).Append("\n"); buffer.Append("[/FILESHARING]\n"); return buffer.ToString(); } public override void Serialize(ILittleEndianOutput out1) { // TODO - junit out1.WriteShort(ReadOnly); out1.WriteShort(Password); out1.WriteShort(field_3_username_value.Length); if (field_3_username_value.Length > 0) { out1.WriteByte(field_3_username_unicode_options); StringUtil.PutCompressedUnicode(Username, out1); } } protected override int DataSize { get { int nameLen = field_3_username_value.Length; if (nameLen < 1) { return 6; } return 7 + nameLen; } } public override short Sid { get { return sid; } } /** * Clone this record. */ public override Object Clone() { FileSharingRecord Clone = new FileSharingRecord(); Clone.ReadOnly = field_1_Readonly; Clone.Password = field_2_password; Clone.Username = field_3_username_value; return Clone; } } }