256 lines
7.9 KiB
C#
256 lines
7.9 KiB
C#
// CoreUtil
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//
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// Copyright (C) 2012-2014 Daiyuu Nobori. All Rights Reserved.
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// Copyright (C) 2012-2014 SoftEther VPN Project at University of Tsukuba. All Rights Reserved.
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// Comments: Tetsuo Sugiyama, Ph.D.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// version 2 as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License version 2
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// THE LICENSE AGREEMENT IS ATTACHED ON THE SOURCE-CODE PACKAGE
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// AS "LICENSE.TXT" FILE. READ THE TEXT FILE IN ADVANCE TO USE THE SOFTWARE.
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//
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//
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// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN,
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// UNDER JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY,
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// MERGE, PUBLISH, DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS
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// SOFTWARE, THAT ANY JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS
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// SOFTWARE OR ITS CONTENTS, AGAINST US (SOFTETHER PROJECT, SOFTETHER
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// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
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// DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND OF USING, COPYING,
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// MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING, AND/OR
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// SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
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// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO
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// EXCLUSIVE JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO,
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// JAPAN. YOU MUST WAIVE ALL DEFENSES OF LACK OF PERSONAL JURISDICTION
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// AND FORUM NON CONVENIENS. PROCESS MAY BE SERVED ON EITHER PARTY IN
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// THE MANNER AUTHORIZED BY APPLICABLE LAW OR COURT RULE.
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//
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// USE ONLY IN JAPAN. DO NOT USE THIS SOFTWARE IN ANOTHER COUNTRY UNLESS
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// YOU HAVE A CONFIRMATION THAT THIS SOFTWARE DOES NOT VIOLATE ANY
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// CRIMINAL LAWS OR CIVIL RIGHTS IN THAT PARTICULAR COUNTRY. USING THIS
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// SOFTWARE IN OTHER COUNTRIES IS COMPLETELY AT YOUR OWN RISK. THE
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// SOFTETHER VPN PROJECT HAS DEVELOPED AND DISTRIBUTED THIS SOFTWARE TO
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// COMPLY ONLY WITH THE JAPANESE LAWS AND EXISTING CIVIL RIGHTS INCLUDING
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// PATENTS WHICH ARE SUBJECTS APPLY IN JAPAN. OTHER COUNTRIES' LAWS OR
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// CIVIL RIGHTS ARE NONE OF OUR CONCERNS NOR RESPONSIBILITIES. WE HAVE
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// NEVER INVESTIGATED ANY CRIMINAL REGULATIONS, CIVIL LAWS OR
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// INTELLECTUAL PROPERTY RIGHTS INCLUDING PATENTS IN ANY OF OTHER 200+
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// COUNTRIES AND TERRITORIES. BY NATURE, THERE ARE 200+ REGIONS IN THE
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// WORLD, WITH DIFFERENT LAWS. IT IS IMPOSSIBLE TO VERIFY EVERY
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// COUNTRIES' LAWS, REGULATIONS AND CIVIL RIGHTS TO MAKE THE SOFTWARE
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// COMPLY WITH ALL COUNTRIES' LAWS BY THE PROJECT. EVEN IF YOU WILL BE
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// SUED BY A PRIVATE ENTITY OR BE DAMAGED BY A PUBLIC SERVANT IN YOUR
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// COUNTRY, THE DEVELOPERS OF THIS SOFTWARE WILL NEVER BE LIABLE TO
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// RECOVER OR COMPENSATE SUCH DAMAGES, CRIMINAL OR CIVIL
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// RESPONSIBILITIES. NOTE THAT THIS LINE IS NOT LICENSE RESTRICTION BUT
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// JUST A STATEMENT FOR WARNING AND DISCLAIMER.
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//
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//
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// SOURCE CODE CONTRIBUTION
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// ------------------------
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//
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// Your contribution to SoftEther VPN Project is much appreciated.
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// Please send patches to us through GitHub.
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// Read the SoftEther VPN Patch Acceptance Policy in advance:
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// http://www.softether.org/5-download/src/9.patch
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//
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//
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// DEAR SECURITY EXPERTS
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// ---------------------
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//
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// If you find a bug or a security vulnerability please kindly inform us
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// about the problem immediately so that we can fix the security problem
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// to protect a lot of users around the world as soon as possible.
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//
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// Our e-mail address for security reports is:
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// softether-vpn-security [at] softether.org
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//
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// Please note that the above e-mail address is not a technical support
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// inquiry address. If you need technical assistance, please visit
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// http://www.softether.org/ and ask your question on the users forum.
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//
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// Thank you for your cooperation.
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//
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//
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// NO MEMORY OR RESOURCE LEAKS
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// ---------------------------
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//
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// The memory-leaks and resource-leaks verification under the stress
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// test has been passed before release this source code.
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using System;
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using System.Threading;
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using System.Data;
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using System.Data.Sql;
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using System.Data.SqlClient;
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using System.Data.SqlTypes;
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using System.Text;
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using System.Configuration;
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using System.Collections;
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using System.Collections.Generic;
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using System.Security.Cryptography;
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using System.Web;
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using System.Web.Security;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.WebControls.WebParts;
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using System.Web.UI.HtmlControls;
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using System.IO;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Drawing.Drawing2D;
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using System.Diagnostics;
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using System.Web.Mail;
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using System.Net;
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using System.Net.Sockets;
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using System.Net.NetworkInformation;
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namespace CoreUtil
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{
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public class RC4 : ICloneable
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{
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uint x, y;
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uint[] state;
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public RC4(byte[] key)
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{
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state = new uint[256];
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uint i, t, u, ki, si;
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x = 0;
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y = 0;
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for (i = 0; i < 256; i++)
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{
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state[i] = i;
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}
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ki = si = 0;
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for (i = 0; i < 256; i++)
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{
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t = state[i];
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si = (si + key[ki] + t) & 0xff;
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u = state[si];
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state[si] = t;
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state[i] = u;
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if (++ki >= key.Length)
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{
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ki = 0;
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}
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}
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}
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private RC4()
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{
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}
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public object Clone()
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{
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RC4 rc4 = new RC4();
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rc4.x = this.x;
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rc4.y = this.y;
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rc4.state = (uint[])this.state.Clone();
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return rc4;
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}
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public byte[] Encrypt(byte[] src)
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{
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return Encrypt(src, src.Length);
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}
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public byte[] Encrypt(byte[] src, int len)
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{
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return Encrypt(src, 0, len);
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}
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public byte[] Encrypt(byte[] src, int offset, int len)
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{
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byte[] dst = new byte[len];
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uint x, y, sx, sy;
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x = this.x;
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y = this.y;
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int src_i = 0, dst_i = 0, end_src_i;
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for (end_src_i = src_i + len; src_i != end_src_i; src_i++, dst_i++)
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{
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x = (x + 1) & 0xff;
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sx = state[x];
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y = (sx + y) & 0xff;
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state[x] = sy = state[y];
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state[y] = sx;
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dst[dst_i] = (byte)(src[src_i + offset] ^ state[(sx + sy) & 0xff]);
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}
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this.x = x;
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this.y = y;
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return dst;
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}
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public void SkipDecrypt(int len)
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{
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SkipEncrypt(len);
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}
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public void SkipEncrypt(int len)
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{
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uint x, y, sx, sy;
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x = this.x;
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y = this.y;
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int src_i = 0, dst_i = 0, end_src_i;
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for (end_src_i = src_i + len; src_i != end_src_i; src_i++, dst_i++)
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{
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x = (x + 1) & 0xff;
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sx = state[x];
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y = (sx + y) & 0xff;
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state[x] = sy = state[y];
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state[y] = sx;
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}
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this.x = x;
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this.y = y;
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}
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public byte[] Decrypt(byte[] src)
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{
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return Decrypt(src, src.Length);
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}
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public byte[] Decrypt(byte[] src, int len)
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{
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return Decrypt(src, 0, len);
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}
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public byte[] Decrypt(byte[] src, int offset, int len)
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{
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return Encrypt(src, offset, len);
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}
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}
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}
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// Developed by SoftEther VPN Project at University of Tsukuba in Japan.
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// Department of Computer Science has dozens of overly-enthusiastic geeks.
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// Join us: http://www.tsukuba.ac.jp/english/admission/
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