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crypt.cpp
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crypt.cpp
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#include <windows.h>
#include <wincrypt.h>
#include "crypt.h"
//////////////////////////////////////////////////// ///////////////////////////////////////////////
// http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html
//////////////////////////////////////////////////// ///////////////////////////////////////////////
#if(1)
/* Period parameters */
#define N 624
#define M 397
#define MATRIX_A 0x9908b0dfUL /* constant vector a */
#define UPPER_MASK 0x80000000UL /* most significant w-r bits */
#define LOWER_MASK 0x7fffffffUL /* least significant r bits */
#define MT_RAND_MAX ((long)(0x7FFFFFFF)) /* (1 << 31) - 1 */
static unsigned long mt[N]; /* the array for the state vector */
static int mti;
static DWORD _last_rand_tickcount;
/* initializes mt[N] with a seed */
void init_genrand(unsigned long s)
{
mt[0]= s & 0xffffffffUL;
for (mti = 1; mti < N; mti++)
{
mt[mti] = (1812433253UL * (mt[mti - 1] ^ (mt[mti - 1] >> 30)) + mti);
/* See Knuth TAOCP Vol2. 3rd Ed. P.106 for multiplier. */
/* In the previous versions, MSBs of the seed affect */
/* only MSBs of the array mt[]. */
/* 2002/01/09 modified by Makoto Matsumoto */
mt[mti] &= 0xffffffffUL;
/* for >32 bit machines */
}
}
/* generates a random number on [0,0xffffffff]-interval */
unsigned long genrand_int32(void)
{
unsigned long y;
static unsigned long mag01[2] = {0x0UL, MATRIX_A};
/* mag01[x] = x * MATRIX_A for x=0,1 */
if(mti >= N)/* generate N words at one time */
{
int kk;
for(kk = 0; kk < N - M; kk++)
{
y = (mt[kk] & UPPER_MASK) | (mt[kk + 1] & LOWER_MASK);
mt[kk] = mt[kk + M] ^ (y >> 1) ^ mag01[y & 0x1UL];
}
for(; kk < N - 1; kk++)
{
y = (mt[kk] & UPPER_MASK) | (mt[kk + 1] & LOWER_MASK);
mt[kk] = mt[kk + (M - N)] ^ (y >> 1) ^ mag01[y & 0x1UL];
}
y = (mt[N - 1] & UPPER_MASK) | (mt[0] & LOWER_MASK);
mt[N - 1] = mt[M - 1] ^ (y >> 1) ^ mag01[y & 0x1UL];
mti = 0;
}
y = mt[mti++];
/* Tempering */
y ^= (y >> 11);
y ^= (y << 7) & 0x9d2c5680UL;
y ^= (y << 15) & 0xefc60000UL;
y ^= (y >> 18);
return y;
}
#endif
//////////////////////////////////////////////////// ///////////////////////////////////////////////
static bool crc32Intalized;
void Crypt::init(void)
{
_last_rand_tickcount = 0;
crc32Intalized = false;
}
void Crypt::uninit(void)
{
}
bool Crypt::_md5Hash(LPBYTE output, void *inputData, DWORD dataSize)
{
bool r = false;
HCRYPTPROV hashProv;
if(CWA(advapi32, CryptAcquireContextW)(&hashProv, NULL, NULL, PROV_RSA_FULL /*Èìåííî ýòî çíà÷åíèå, íå êàêîãî èíîãî.*/, CRYPT_VERIFYCONTEXT | CRYPT_SILENT) != FALSE)
{
HCRYPTHASH hashHandle;
if(CWA(advapi32, CryptCreateHash)(hashProv, CALG_MD5, 0, 0, &hashHandle) == TRUE)
{
DWORD hashLen = MD5HASH_SIZE;
if(CWA(advapi32, CryptHashData)(hashHandle, (LPBYTE)inputData, dataSize, 0) == TRUE && CWA(advapi32, CryptGetHashParam)(hashHandle, HP_HASHVAL, output, &hashLen, 0) == TRUE && hashLen == MD5HASH_SIZE)r = true;
CWA(advapi32, CryptDestroyHash)(hashHandle);
}
CWA(advapi32, CryptReleaseContext)(hashProv, 0);
}
return r;
}
DWORD Crypt::mtRand(void)
{
DWORD c = CWA(kernel32, GetTickCount)();
if(c != _last_rand_tickcount)
{
_last_rand_tickcount = c;
init_genrand(c);
}
return genrand_int32();
}
DWORD Crypt::mtRandRange(DWORD minVal, DWORD maxVal)
{
if(maxVal == minVal)return maxVal;
register DWORD r = mtRand();
register DWORD x = maxVal - minVal + 1;
return minVal + (r - (r / x) * x);
}
static DWORD crc32table[256];
DWORD Crypt::crc32Hash(const void *data, DWORD size)
{
if(crc32Intalized == false)
{
register DWORD crc;
for(register DWORD i = 0; i < 256; i++)
{
crc = i;
for(register DWORD j = 8; j > 0; j--)
{
if(crc & 0x1)crc = (crc >> 1) ^ 0xEDB88320L;
else crc >>= 1;
}
crc32table[i] = crc;
}
crc32Intalized = true;
}
register DWORD cc = 0xFFFFFFFF;
for(register DWORD i = 0; i < size; i++)cc = (cc >> 8) ^ crc32table[(((LPBYTE)data)[i] ^ cc) & 0xFF];
return ~cc;
}
#define swap_byte(a, b) {swapByte = a; a = b; b = swapByte;}
void Crypt::_rc4Init(const void *binKey, WORD binKeySize, RC4KEY *key)
{
register BYTE swapByte;
register BYTE index1 = 0, index2 = 0;
LPBYTE state = &key->state[0];
register WORD i;
key->x = 0;
key->y = 0;
for(i = 0; i < 256; i++)state[i] = i;
for(i = 0; i < 256; i++)
{
index2 = (((LPBYTE)binKey)[index1] + state[i] + index2) & 0xFF;
swap_byte(state[i], state[index2]);
if(++index1 == binKeySize)index1 = 0;
}
}
void Crypt::_rc4(void *buffer, DWORD size, RC4KEY *key)
{
register BYTE swapByte;
register BYTE x = key->x;
register BYTE y = key->y;
LPBYTE state = &key->state[0];
for(register DWORD i = 0; i < size; i++)
{
x = (x + 1) & 0xFF;
y = (state[x] + y) & 0xFF;
swap_byte(state[x], state[y]);
((LPBYTE)buffer)[i] ^= state[(state[x] + state[y]) & 0xFF];
}
key->x = x;
key->y = y;
}
void Crypt::_rc4Full(const void *binKey, WORD binKeySize, void *buffer, DWORD size)
{
Crypt::RC4KEY key;
Crypt::_rc4Init(binKey, binKeySize, &key);
Crypt::_rc4(buffer, size, &key);
}
void Crypt::_visualEncrypt(void *buffer, DWORD size)
{
for(DWORD i = 1; i < size; i++)((LPBYTE)buffer)[i] ^= ((LPBYTE)buffer)[i - 1];
}
void Crypt::_visualDecrypt(void *buffer, DWORD size)
{
if(size > 0)for(DWORD i = size - 1; i > 0; i--)((LPBYTE)buffer)[i] ^= ((LPBYTE)buffer)[i - 1];
}
LPSTR Crypt::_base64Encode(LPBYTE source, SIZE_T sourceSize, SIZE_T *destSize)
{
static const char cb64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
LPBYTE dest = (LPBYTE)Mem::alloc((sourceSize + 2) / 3 * 4 + 1);
if(dest != NULL)
{
LPBYTE p = dest;
BYTE cur[3];
while(sourceSize > 0)
{
DWORD len = 0;
for(DWORD i = 0; i < 3; i++)
{
if(sourceSize > 0)
{
sourceSize--;
len++;
cur[i] = source[i];
}
else cur[i] = 0;
}
source += 3;
p[0] = cb64[cur[0] >> 2];
p[1] = cb64[((cur[0] & 0x03) << 4) | ((cur[1] & 0xF0) >> 4)];
p[2] = (BYTE)(len > 1 ? cb64[((cur[1] & 0x0F) << 2) | ((cur[2] & 0xC0) >> 6) ] : '=');
p[3] = (BYTE)(len > 2 ? cb64[cur[2] & 0x3F] : '=');
p += 4;
}
*p = 0;
if(destSize)*destSize = (SIZE_T)(p - dest);
}
return (LPSTR)dest;
}
LPBYTE Crypt::_base64Decode(LPSTR source, SIZE_T sourceSize, SIZE_T *destSize)
{
static const char cd64[] = "|$$$}rstuvwxyz{$$$$$$$>?@ABCDEFGHIJKLMNOPQRSTUVW$$$$$$XYZ[\\]^_`abcdefghijklmnopq";
LPBYTE dest = (LPBYTE)Mem::alloc(sourceSize + sizeof(BYTE));
if(dest != NULL)
{
LPBYTE p = (LPBYTE)source;
LPBYTE e = p + sourceSize;
LPBYTE r = (LPBYTE)dest;
BYTE in[4], out[3], v;
int len, i;
while(p < e)
{
for(len = 0, i = 0; i < 4 && p < e; i++)
{
v = 0;
while(p < e && v == 0)
{
v = (BYTE)*(p++);
v = (BYTE)((v < 43 || v > 122) ? 0 : cd64[v - 43]);
if(v != 0)v = (BYTE)((v == '$') ? 0 : v - 61);
}
if(v != 0)
{
len++;
in[i] = (BYTE)(v - 1);
}
}
if(len)
{
out[0] = (BYTE)(in[0] << 2 | in[1] >> 4);
out[1] = (BYTE)(in[1] << 4 | in[2] >> 2);
out[2] = (BYTE)(((in[2] << 6) & 0xC0) | in[3]);
for(i = 0; i < len - 1; i++){*(r++) = out[i]; if(i==0)i=0;/*instrict*/}
}
}
*r = 0;
if(destSize)*destSize = (SIZE_T)(r - dest);
}
return dest;
}
void Crypt::_generateBinaryData(void *buffer, DWORD size, BYTE minValue, BYTE maxValue, bool extMode)
{
for(DWORD i = 0; i < size; i++)
{
if(extMode && i > 0)CWA(kernel32, Sleep)(20);
((LPBYTE)buffer)[i] = (BYTE)Crypt::mtRandRange(minValue, maxValue);
}
}
void Crypt::_generateRc4Key(Crypt::RC4KEY *key)
{
BYTE keybuf[40];
_generateBinaryData(keybuf, sizeof(keybuf), 0, 0xFF, true);
_rc4Init(keybuf, sizeof(keybuf), key);
}