Dr.com哆点客户端本地密码查看

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <basetsd.h>
/************************************************************************/
/* Dr.com Ver 5.2.0 配置文件解密
/* By Douniwan5788@gmail.com
/************************************************************************/
void decrypt(UINT32 data1,UINT32 data2, UINT32 key1, UINT32 key2, UINT32 key3, UINT32 key4,PUINT32 value1,PUINT32 value2)
{
__asm{
MOV     ECX, data1
MOV     EAX, data2
MOV     EDX, 0xC6EF3720 ;  const
MOV     ESI, 0x20
_decrypt_start:
MOV     EDI, ECX
SAR     EDI, 5
ADD     EDI, key4   ;  key4
MOV     EBX, ECX
SHL     EBX, 4
ADD     EBX, key3   ;  key3
SUB     ESI, 1
XOR     EDI, EBX
LEA     EBX, DWORD PTR DS:[EDX+ECX] ;  ebx = edx+ecx
XOR     EDI, EBX
SUB     EAX, EDI
MOV     EDI, EAX
SAR     EDI, 5
ADD     EDI, key2   ;  key2
MOV     EBX, EAX
SHL     EBX, 4
ADD     EBX, key1   ;  key1
XOR     EDI, EBX
LEA     EBX, DWORD PTR DS:[EDX+EAX]
XOR     EDI, EBX
SUB     ECX, EDI
ADD     EDX, 0x61C88647
TEST    ESI, ESI
JG      _decrypt_start
MOV     data1,ECX
MOV     data2,EAX
};
*value1 = data1;
*value2 = data2;
}

struct key_file{
char filename[256];
char key[32];
};

int  main(int   argc,   char*   argv[])
{
key_file kf[]={
{"config","3J21d456j87jIOJ9"},          //账号密码
{"DrConfigure","DrConfigure"},          //配置
{"DrClient.gb","DrClient_Dict"},        //中文语言资源
{"DrClient.en","DrClient_Dict"},        //英文语言资源
{"DrLinkConfigure","DrConfigure"},  //who cares
};
char path[256]={"C:\\Drcom\\DrUpdateClient\\"};
char strbuf[256];
UINT32 keys[4],dec_data1,dec_data2,enc_data[3]; //extra 1 for scanf

for(key_file *pkf = kf; pkf - kf < sizeof(kf)/sizeof(key_file); pkf++){
for (int i = 0; i < 4; ++i)
{
memcpy(&keys[i],pkf->key + 4*i,4);
}

FILE *fpIn = fopen(pkf->filename,"r");
if (!fpIn)
{
sprintf_s(strbuf,sizeof(strbuf),"%s%s",path,pkf->filename);
fpIn = fopen(strbuf,"r");
if (!fpIn)
{
printf("File not found, skip %s\n",pkf->filename);
continue;
}
}

sprintf_s(strbuf,sizeof(strbuf),"Decrypt_%s.txt",pkf->filename);
FILE *fpOut = fopen(strbuf,"wb");
if (!fpOut)
{
printf("Can't write %s! Skip!\n",strbuf);
continue;
}
//fwrite("\xff\xfe",2,1,fpOut);

while (1){
for (int i = 0 ;i < 8;++i)
{
if (fscanf_s(fpIn,"%02x",&((char *)enc_data)[i]) <= 0)
{
goto end;
}
}
//printf("%08X %08X",enc_data[0],enc_data[1]);
decrypt(enc_data[0],enc_data[1],keys[0],keys[1],keys[2],keys[3],&dec_data1,&dec_data2);
fwrite(&dec_data1,4,1,fpOut);
fwrite(&dec_data2,4,1,fpOut);
}
end:
fclose(fpIn);
fclose(fpOut);
printf("%s decrypt to %s finished\n",pkf->filename,strbuf);
}

}