You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
2.9 KiB
79 lines
2.9 KiB
/*==LICENSE==* |
|
|
|
CyanWorlds.com Engine - MMOG client, server and tools |
|
Copyright (C) 2011 Cyan Worlds, Inc. |
|
|
|
This program is free software: you can redistribute it and/or modify |
|
it under the terms of the GNU General Public License as published by |
|
the Free Software Foundation, either version 3 of the License, or |
|
(at your option) any later version. |
|
|
|
This program is distributed in the hope that it will be useful, |
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
GNU General Public License for more details. |
|
|
|
You should have received a copy of the GNU General Public License |
|
along with this program. If not, see <http://www.gnu.org/licenses/>. |
|
|
|
You can contact Cyan Worlds, Inc. by email legal@cyan.com |
|
or by snail mail at: |
|
Cyan Worlds, Inc. |
|
14617 N Newport Hwy |
|
Mead, WA 99021 |
|
|
|
*==LICENSE==*/ |
|
////////////////////////////////////////////////////////////////////////////// |
|
// // |
|
// plEncryptLogLine Header // |
|
// // |
|
//// Description ///////////////////////////////////////////////////////////// |
|
// // |
|
// Broken into a separate file for easy include in utility apps // |
|
// // |
|
////////////////////////////////////////////////////////////////////////////// |
|
|
|
#include "plEncryptLogLine.h" |
|
|
|
#include <string.h> |
|
|
|
void plStatusEncrypt::Encrypt( UInt8 *line, UInt8 hint ) |
|
{ |
|
// Current encryption scheme: rotate all characters right by 2 bits, |
|
// then rotate the whole damn line by 3 bits to the right |
|
UInt32 i, len = strlen( (char *)line ); |
|
UInt8 newHi, hiBits = ( ( line[ len - 1 ] ) << ( 5 - 2 ) ) & 0xe0; |
|
|
|
for( i = 0; i < len; i++ ) |
|
{ |
|
// So each character will be the src char rotated right 2 bits, then shifted |
|
// right 3 bits, or'ed with the last high bits, and the 3 discarded bits |
|
// become the new high bits |
|
// Too bad C doesn't have a bit-rotate op |
|
|
|
line[ i ] = ( line[ i ] << 6 ) | ( line[ i ] >> 2 ); |
|
newHi = line[ i ] << 5; |
|
line[ i ] = ( line[ i ] >> 3 ) | hiBits; |
|
line[ i ] ^= hint; // Should wrap around |
|
|
|
hiBits = newHi; |
|
} |
|
} |
|
|
|
void plStatusEncrypt::Decrypt( UInt8 *line, Int32 len, UInt8 hint ) |
|
{ |
|
// Da reverse, of course! |
|
Int32 i; |
|
UInt8 lastChar = 0, newLo, loBits = ( line[ 0 ] ^ hint ) >> 5; |
|
|
|
for( i = len - 1; i >= 0; i-- ) |
|
{ |
|
lastChar = line[ i ]; |
|
line[ i ] ^= hint; |
|
newLo = line[ i ] >> 5; |
|
line[ i ] = ( line[ i ] << 3 ) | loBits; |
|
line[ i ] = ( line[ i ] >> 6 ) | ( line[ i ] << 2 ); |
|
|
|
loBits = newLo; |
|
} |
|
}
|
|
|