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95 lines
3.4 KiB
95 lines
3.4 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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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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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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Additional permissions under GNU GPL version 3 section 7 |
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If you modify this Program, or any covered work, by linking or |
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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK, |
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NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent |
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JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK |
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(or a modified version of those libraries), |
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containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA, |
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PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG |
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JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the |
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licensors of this Program grant you additional |
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permission to convey the resulting work. Corresponding Source for a |
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non-source form of such a combination shall include the source code for |
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the parts of OpenSSL and IJG JPEG Library used as well as that of the covered |
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work. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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////////////////////////////////////////////////////////////////////////////// |
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// // |
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// plEncryptLogLine Header // |
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// // |
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//// Description ///////////////////////////////////////////////////////////// |
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// // |
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// Broken into a separate file for easy include in utility apps // |
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// // |
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////////////////////////////////////////////////////////////////////////////// |
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#include "plEncryptLogLine.h" |
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#include <string.h> |
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void plStatusEncrypt::Encrypt( UInt8 *line, UInt8 hint ) |
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{ |
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// Current encryption scheme: rotate all characters right by 2 bits, |
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// then rotate the whole damn line by 3 bits to the right |
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UInt32 i, len = strlen( (char *)line ); |
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UInt8 newHi, hiBits = ( ( line[ len - 1 ] ) << ( 5 - 2 ) ) & 0xe0; |
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for( i = 0; i < len; i++ ) |
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{ |
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// So each character will be the src char rotated right 2 bits, then shifted |
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// right 3 bits, or'ed with the last high bits, and the 3 discarded bits |
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// become the new high bits |
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// Too bad C doesn't have a bit-rotate op |
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line[ i ] = ( line[ i ] << 6 ) | ( line[ i ] >> 2 ); |
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newHi = line[ i ] << 5; |
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line[ i ] = ( line[ i ] >> 3 ) | hiBits; |
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line[ i ] ^= hint; // Should wrap around |
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hiBits = newHi; |
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} |
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} |
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void plStatusEncrypt::Decrypt( UInt8 *line, Int32 len, UInt8 hint ) |
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{ |
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// Da reverse, of course! |
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Int32 i; |
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UInt8 lastChar = 0, newLo, loBits = ( line[ 0 ] ^ hint ) >> 5; |
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for( i = len - 1; i >= 0; i-- ) |
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{ |
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lastChar = line[ i ]; |
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line[ i ] ^= hint; |
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newLo = line[ i ] >> 5; |
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line[ i ] = ( line[ i ] << 3 ) | loBits; |
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line[ i ] = ( line[ i ] >> 6 ) | ( line[ i ] << 2 ); |
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loBits = newLo; |
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} |
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}
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