forked from LosaDev/ls-2019-source
50 lines
826 B
C++
50 lines
826 B
C++
#include "../stdafx.h"
|
|
#include "md5.h"
|
|
#include "cryption.h"
|
|
|
|
void Encrypt(BYTE *szSrc, int len)
|
|
{
|
|
BYTE ch;
|
|
BYTE temp;
|
|
|
|
for( int i=0 ; i<len ; i++ )
|
|
{
|
|
ch = szSrc[i];
|
|
ch ^= 0xff;
|
|
temp = (ch & 0xe0) >> 5;
|
|
ch <<= 3;
|
|
ch |= temp;
|
|
szSrc[i] = ch;
|
|
}
|
|
}
|
|
|
|
void Decrypt(BYTE *szSrc, int len)
|
|
{
|
|
BYTE ch;
|
|
BYTE temp;
|
|
|
|
for( int i=0 ; i<len ; i++ )
|
|
{
|
|
ch = szSrc[i];
|
|
temp = (ch & 0x07) << 5;
|
|
ch>>=3;
|
|
ch |= temp;
|
|
ch ^= 0xff;
|
|
szSrc[i] = ch;
|
|
}
|
|
}
|
|
|
|
DWORD MakeDigest( BYTE *szSrc, int len )
|
|
{
|
|
MD5Context md5_ctx;
|
|
DWORD dwDigest[4];
|
|
|
|
MD5Init( &md5_ctx );
|
|
MD5Update( &md5_ctx, (unsigned char const *)szSrc, len );
|
|
MD5Final( (BYTE*)&dwDigest, &md5_ctx );
|
|
|
|
DWORD dwResult;
|
|
dwResult = dwDigest[0] ^ dwDigest[1] ^ dwDigest[2] ^ dwDigest[3];
|
|
|
|
return dwResult;
|
|
} |