📄 md5.c
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/*****************************************************************
*
* Reversed By yykingking (yykingking@126.com)
* 仅供学习交流使用
*****************************************************************/
#include <ntddk.h>
#include "header.h"
#include "md5.h"
extern PVOID g_pVoidUnknown1;
extern char* g_cArrayUnknown1;
unsigned char PADDING[64] =
{
0x80, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
};
const UINT4 S11 = 7;
const UINT4 S12 = 12;
const UINT4 S13 = 17;
const UINT4 S14 = 22;
const UINT4 S21 = 5;
const UINT4 S22 = 9;
const UINT4 S23 = 14;
const UINT4 S24 = 20;
const UINT4 S31 = 4;
const UINT4 S32 = 11;
const UINT4 S33 = 16;
const UINT4 S34 = 23;
const UINT4 S41 = 6;
const UINT4 S42 = 10;
const UINT4 S43 = 15;
const UINT4 S44 = 21;
unsigned char g_DestBuffer[36] = { 0,};
unsigned char g_SourceBuffer[16] = { 0,};
unsigned char g_BinStrBuffer[132] = { 0,}; //存放2进制的字符串
void MD5_memset( char* Dest, char cByte, int Num)
{
memset( Dest, cByte, Num);
}
void MD5Encode(unsigned char *output, UINT4 *input, unsigned int len)
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) {
output[j] = (unsigned char)(input[i] & 0xff);
output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
}
}
void MD5_memcpy( char* Dest, char* Source, int Length)
{
memcpy( Dest, Source, Length);
}
void MD5Decode(UINT4 *output, unsigned char *input, unsigned int len)
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
(((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
}
void MD5Init( PMD5CONTEXT pContext)
{
pContext->state[0] = 0x67452301;
pContext->state[1] = 0xEFCDAB89;
pContext->state[2] = 0x98BADCFE;
pContext->state[3] = 0x10325476;
pContext->count[0] = 0;
pContext->count[1] = 0;
}
void MD5Transform (UINT4 state[4], unsigned char block[64])
{
UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
MD5Decode(x, block, 64);
/* Round 1 */
FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
/* Round 2 */
GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
GG (d, a, b, c, x[10], S22, 0x02441453); /* 22 */
GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
/* Round 3 */
HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
HH (b, c, d, a, x[ 6], S34, 0x04881d05); /* 44 */
HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
/* Round 4 */
II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
/* Zeroize sensitive information.
*/
MD5_memset((POINTER)x, 0, sizeof (x));
}
void MD5Update( PMD5CONTEXT pContext, unsigned char *input, unsigned int inputLen)
{
unsigned int i, index, partLen;
// Compute number of bytes mod 64
index = (unsigned int)((pContext->count[0]>>3)&0x3F);
// Update number of bits
if( ( pContext->count[0] += ((UINT4)inputLen<<3) ) < ( (UINT4)inputLen<<3) )
pContext->count[1]++;
pContext->count[1] += ( (UINT4)inputLen>>29 );
partLen = 64 - index;
// Transform as many times as possible.
if (inputLen >= partLen)
{
MD5_memcpy((POINTER)&pContext->buffer[index], (POINTER)input, partLen);
MD5Transform( pContext->state, pContext->buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
MD5Transform(pContext->state, &input[i]);
index = 0;
}
else
i = 0;
// Buffer remaining input
MD5_memcpy((POINTER)&pContext->buffer[index], (POINTER)&input[i], inputLen-i);
}
void MD5Final(PMD5CONTEXT pContext, unsigned char digest[16])
{
unsigned char bits[8];
unsigned int index, padLen;
/* Save number of bits */
MD5Encode(bits, pContext->count, 8);
/* Pad out to 56 mod 64.*/
index = (unsigned int)((pContext->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
MD5Update(pContext,PADDING, padLen);
/* Append length (before padding) */
MD5Update(pContext,bits, 8);
/* Store state in digest */
MD5Encode(digest, pContext->state, 16);
/* Zeroize sensitive information. */
MD5_memset( (unsigned char*)pContext, 0, sizeof(MD5CONTEXT));
}
NTSTATUS MD5String( PDEVICE_OBJECT pDeviceObj, PIRP pIrp)
{
PIO_STACK_LOCATION pIrpStack;
MD5CONTEXT md5Context;
int Index;
PMDL pMdl;
pIrpStack = IoGetCurrentIrpStackLocation( pIrp);
if ( g_pVoidUnknown1 != NULL)
{
// 推测此表是个*码转换表,,,???
ConvertCharArray( g_cArrayUnknown1, g_pVoidUnknown1);
memset( g_SourceBuffer, 0, 16);
memset( g_DestBuffer, 0, 33);
memset( g_BinStrBuffer, 0, 129);
MD5Init( &md5Context);
MD5Update( &md5Context, g_pVoidUnknown1, strlen( g_pVoidUnknown1));
MD5Final( &md5Context, g_SourceBuffer);
for ( Index=0; Index<16; Index++)
{
sprintf( g_DestBuffer, "%02x", g_SourceBuffer[Index]);
}
ChangeHexToBin( (char*)g_DestBuffer, (char*)g_BinStrBuffer);
pMdl = pIrp->MdlAddress;
if ( pMdl->MdlFlags == ( MDL_SOURCE_IS_NONPAGED_POOL | MDL_MAPPED_TO_SYSTEM_VA))
MmMapLockedPages( pMdl, KernelMode);
else
pMdl = (PMDL)pMdl->MappedSystemVa;
memcpy( pMdl, g_BinStrBuffer, pIrpStack->Parameters.DeviceIoControl.OutputBufferLength);
}
return STATUS_SUCCESS;
}⌨️ 快捷键说明
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