WINDOWS NT/2000 密碼到散列的實現算法

創建時間：2003-05-15
文章屬性：原創
文章提交：flashsky (flashsky1_at_sina.com)

轉摘請注明作者和安全焦點
作者：FLASHSKY
SITE：WWW.XFOCUS.NET，WWW.SHOPSKY.COM
郵件：flashsky@xfocus.org

好久沒給大家寫點東西了，現在給大家一點近階段研究SMB的一點東西吧。
    NT/2000的密碼散列也叫OWF，其實這個散列的作用很大，任何密碼都會先生成散列進行保存，在網絡認證的時候，也會使用散列。
    但是關于NT/2000的密碼散列雖然有很多的介紹，但是卻缺乏具體的算法，影響了對于其算法安全性的研究，這里就是通過反匯編獲得的密碼到散列的實現。
    NT/2000的密碼散列其實由2部分組成，一部分是通過變形DES算法，使用密碼的大寫OEM格式作為密鑰（分成2個KEY，每個KEY7字節，用0補足14個字節），通過DESECB方式獲得一個128位的密鑰，加密特殊字符串“KGS!@#$%”獲得的一個16字節長度的值。另一部分則是使用MD4對密碼的UNICODE形式進行加密獲得的一個散列，下面就是具體的算法代碼，提供給大家做進一步深入的研究：
    //注：DES的算法與標準DES的算法有如下不同
    //與標準DES的SPBOX不同
    //與標準DES的ECB生成算法不同，DESKEY不同，標準的是生成64位字節，而他是生成128位字節
    //標準的DES一次是8字節塊加密8字節再循環，而他是16字節一次
    //關于MD4的實現，我這里沒有標準MD4的算法實現和說明，但是有MD5的，按照MD4與MD5的區別中，好象算法還是有很多改變。
    //因為按照標準的MD5的說法，每輪當中的每次計算，除了參數不同，函數算法是一致的，但其實他的實現是不同的。
   
void passtoowf(wchar_t * password);
void initLMP(char * pass,unsigned char * LM);
void deskey(char * LmPass,unsigned char * desecb);
void des(unsigned char * LM,char * magic,unsigned char * ecb,long no);
void md4init(unsigned char * LM);
void md4(unsigned char * LM);
void initMDP(PLSA_UNICODE_STRING pass,unsigned char * LM);

typedef DWORD (CALLBACK* RTLUPCASEUNICODESTRINGTOOEMSTRING)(PLSA_UNICODE_STRING, PLSA_UNICODE_STRING, DWORD);
RTLUPCASEUNICODESTRINGTOOEMSTRING RtlUpcaseUnicodeStringToOemString;

unsigned char DESParity[]={0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4};
unsigned char DESDShift[]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,
0x64,0xCC,0xF9,0x29,0xDF,0xDE,0x86,0x4A,0x81,0x84,9,0x3C,0,0,0,0,
0xFB,0x99,0xE9,8,0xEC,0x87,0x67,0x2F,0x59,0x0FD,0x22,0xF1};

DWORD DESKEY1[]={
0x00000000,0x00000010,0x20000000,0x20000010,0x00010000,0x00010010,0x20010000,0x20010010,
0x00000800,0x00000810,0x20000800,0x20000810,0x00010800,0x00010810,0x20010800,0x20010810,
0x00000020,0x00000030,0x20000020,0x20000030,0x00010020,0x00010030,0x20010020,0x20010030,
0x00000820,0x00000830,0x20000820,0x20000830,0x00010820,0x00010830,0x20010820,0x20010830,
0x00080000,0x00080010,0x20080000,0x20080010,0x00090000,0x00090010,0x20090000,0x20090010,
0x00080800,0x00080810,0x20080800,0x20080810,0x00090800,0x00090810,0x20090800,0x20090810,
0x00080020,0x00080030,0x20080020,0x20080030,0x00090020,0x00090030,0x20090020,0x20090030,
0x00080820,0x00080830,0x20080820,0x20080830,0x00090820,0x00090830,0x20090820,0x20090830};

DWORD DESKEY2[]={
0x00000000,0x02000000,0x00002000,0x02002000,0x00200000,0x02200000,0x00202000,0x02202000,
0x00000004,0x02000004,0x00002004,0x02002004,0x00200004,0x02200004,0x00202004,0x02202004,
0x00000400,0x02000400,0x00002400,0x02002400,0x00200400,0x02200400,0x00202400,0x02202400,
0x00000404,0x02000404,0x00002404,0x02002404,0x00200404,0x02200404,0x00202404,0x02202404,
0x10000000,0x12000000,0x10002000,0x12002000,0x10200000,0x12200000,0x10202000,0x12202000,
0x10000004,0x12000004,0x10002004,0x12002004,0x10200004,0x12200004,0x10202004,0x12202004,
0x10000400,0x12000400,0x10002400,0x12002400,0x10200400,0x12200400,0x10202400,0x12202400,
0x10000404,0x12000404,0x10002404,0x12002404,0x10200404,0x12200404,0x10202404,0x12202404};

DWORD DESKEY3[]={
0x00000000,0x00000001,0x00040000,0x00040001,0x01000000,0x01000001,0x01040000,0x01040001,
0x00000002,0x00000003,0x00040002,0x00040003,0x01000002,0x01000003,0x01040002,0x01040003,
0x00000200,0x00000201,0x00040200,0x00040201,0x01000200,0x01000201,0x01040200,0x01040201,
0x00000202,0x00000203,0x00040202,0x00040203,0x01000202,0x01000203,0x01040202,0x01040203,
0x08000000,0x08000001,0x08040000,0x08040001,0x09000000,0x09000001,0x09040000,0x09040001,
0x08000002,0x08000003,0x08040002,0x08040003,0x09000002,0x09000003,0x09040002,0x09040003,
0x08000200,0x08000201,0x08040200,0x08040201,0x09000200,0x09000201,0x09040200,0x09040201,
0x08000202,0x08000203,0x08040202,0x08040203,0x09000202,0x09000203,0x09040202,0x09040203};

DWORD DESKEY4[]={
0x00000000,0x00100000,0x00000100,0x00100100,0x00000008,0x00100008,0x00000108,0x00100108,
0x00001000,0x00101000,0x00001100,0x00101100,0x00001008,0x00101008,0x00001108,0x00101108,
0x04000000,0x04100000,0x04000100,0x04100100,0x04000008,0x04100008,0x04000108,0x04100108,
0x04001000,0x04101000,0x04001100,0x04101100,0x04001008,0x04101008,0x04001108,0x04101108,
0x00020000,0x00120000,0x00020100,0x00120100,0x00020008,0x00120008,0x00020108,0x00120108,
0x00021000,0x00121000,0x00021100,0x00121100,0x00021008,0x00121008,0x00021108,0x00121108,
0x04020000,0x04120000,0x04020100,0x04120100,0x04020008,0x04120008,0x04020108,0x04120108,
0x04021000,0x04121000,0x04021100,0x04121100,0x04021008,0x04121008,0x04021108,0x04121108};

DWORD DESKEY5[]={
0x00000000,0x10000000,0x00010000,0x10010000,0x00000004,0x10000004,0x00010004,0x10010004,
0x20000000,0x30000000,0x20010000,0x30010000,0x20000004,0x30000004,0x20010004,0x30010004,
0x00100000,0x10100000,0x00110000,0x10110000,0x00100004,0x10100004,0x00110004,0x10110004,
0x20100000,0x30100000,0x20110000,0x30110000,0x20100004,0x30100004,0x20110004,0x30110004,
0x00001000,0x10001000,0x00011000,0x10011000,0x00001004,0x10001004,0x00011004,0x10011004,
0x20001000,0x30001000,0x20011000,0x30011000,0x20001004,0x30001004,0x20011004,0x30011004,
0x00101000,0x10101000,0x00111000,0x10111000,0x00101004,0x10101004,0x00111004,0x10111004,
0x20101000,0x30101000,0x20111000,0x30111000,0x20101004,0x30101004,0x20111004,0x30111004};

DWORD DESKEY6[]={
0x00000000,0x08000000,0x00000008,0x08000008,0x00000400,0x08000400,0x00000408,0x08000408,
0x00020000,0x08020000,0x00020008,0x08020008,0x00020400,0x08020400,0x00020408,0x08020408,
0x00000001,0x08000001,0x00000009,0x08000009,0x00000401,0x08000401,0x00000409,0x08000409,
0x00020001,0x08020001,0x00020009,0x08020009,0x00020401,0x08020401,0x00020409,0x08020409,
0x02000000,0x0A000000,0x02000008,0x0A000008,0x02000400,0x0A000400,0x02000408,0x0A000408,
0x02020000,0x0A020000,0x02020008,0x0A020008,0x02020400,0x0A020400,0x02020408,0x0A020408,
0x02000001,0x0A000001,0x02000009,0x0A000009,0x02000401,0x0A000401,0x02000409,0x0A000409,
0x02020001,0x0A020001,0x02020009,0x0A020009,0x02020401,0x0A020401,0x02020409,0x0A020409};

DWORD DESKEY7[]={
0x00000000,0x00000100,0x00080000,0x00080100,0x01000000,0x01000100,0x01080000,0x01080100,
0x00000010,0x00000110,0x00080010,0x00080110,0x01000010,0x01000110,0x01080010,0x01080110,
0x00200000,0x00200100,0x00280000,0x00280100,0x01200000,0x01200100,0x01280000,0x01280100,
0x00200010,0x00200110,0x00280010,0x00280110,0x01200010,0x01200110,0x01280010,0x01280110,
0x00000200,0x00000300,0x00080200,0x00080300,0x01000200,0x01000300,0x01080200,0x01080300,
0x00000210,0x00000310,0x00080210,0x00080310,0x01000210,0x01000310,0x01080210,0x01080310,
0x00200200,0x00200300,0x00280200,0x00280300,0x01200200,0x01200300,0x01280200,0x01280300,
0x00200210,0x00200310,0x00280210,0x00280310,0x01200210,0x01200310,0x01280210,0x01280310};

DWORD DESKEY8[]={
0x00000000,0x04000000,0x00040000,0x04040000,0x00000002,0x04000002,0x00040002,0x04040002,
0x00002000,0x04002000,0x00042000,0x04042000,0x00002002,0x04002002,0x00042002,0x04042002,
0x00000020,0x04000020,0x00040020,0x04040020,0x00000022,0x04000022,0x00040022,0x04040022,
0x00002020,0x04002020,0x00042020,0x04042020,0x00002022,0x04002022,0x00042022,0x04042022,
0x00000800,0x04000800,0x00040800,0x04040800,0x00000802,0x04000802,0x00040802,0x04040802,
0x00002800,0x04002800,0x00042800,0x04042800,0x00002802,0x04002802,0x00042802,0x04042802,
0x00000820,0x04000820,0x00040820,0x04040820,0x00000822,0x04000822,0x00040822,0x04040822,
0x00002820,0x04002820,0x00042820,0x04042820,0x00002822,0x04002822,0x00042822,0x04042822};

DWORD DESSpBox1[]={
0x02080800,0x00080000,0x02000002,0x02080802,0x02000000,0x00080802,0x00080002,0x02000002,
0x00080802,0x02080800,0x02080000,0x00000802,0x02000802,0x02000000,0x00000000,0x00080002,
0x00080000,0x00000002,0x02000800,0x00080800,0x02080802,0x02080000,0x00000802,0x02000800,
0x00000002,0x00000800,0x00080800,0x02080002,0x00000800,0x02000802,0x02080002,0x00000000,
0x00000000,0x02080802,0x02000800,0x00080002,0x02080800,0x00080000,0x00000802,0x02000800,
0x02080002,0x00000800,0x00080800,0x02000002,0x00080802,0x00000002,0x02000002,0x02080000,
0x02080802,0x00080800,0x02080000,0x02000802,0x02000000,0x00000802,0x00080002,0x00000000,
0x00080000,0x02000000,0x02000802,0x02080800,0x00000002,0x02080002,0x00000800,0x00080802};

DWORD DESSpBox2[]={
0x40108010,0x00000000,0x00108000,0x40100000,0x40000010,0x00008010,0x40008000,0x00108000,
0x00008000,0x40100010,0x00000010,0x40008000,0x00100010,0x40108000,0x40100000,0x00000010,
0x00100000,0x40008010,0x40100010,0x00008000,0x00108010,0x40000000,0x00000000,0x00100010,
0x40008010,0x00108010,0x40108000,0x40000010,0x40000000,0x00100000,0x00008010,0x40108010,
0x00100010,0x40108000,0x40008000,0x00108010,0x40108010,0x00100010,0x40000010,0x00000000,
0x40000000,0x00008010,0x00100000,0x40100010,0x00008000,0x40000000,0x00108010,0x40008010,
0x40108000,0x00008000,0x00000000,0x40000010,0x00000010,0x40108010,0x00108000,0x40100000,
0x40100010,0x00100000,0x00008010,0x40008000,0x40008010,0x00000010,0x40100000,0x00108000};

DWORD DESSpBox3[]={
0x04000001,0x04040100,0x00000100,0x04000101,0x00040001,0x04000000,0x04000101,0x00040100,
0x04000100,0x00040000,0x04040000,0x00000001,0x04040101,0x00000101,0x00000001,0x04040001,
0x00000000,0x00040001,0x04040100,0x00000100,0x00000101,0x04040101,0x00040000,0x04000001,
0x04040001,0x04000100,0x00040101,0x04040000,0x00040100,0x00000000,0x04000000,0x00040101,
0x04040100,0x00000100,0x00000001,0x00040000,0x00000101,0x00040001,0x04040000,0x04000101,
0x00000000,0x04040100,0x00040100,0x04040001,0x00040001,0x04000000,0x04040101,0x00000001,
0x00040101,0x04000001,0x04000000,0x04040101,0x00040000,0x04000100,0x04000101,0x00040100,
0x04000100,0x00000000,0x04040001,0x00000101,0x04000001,0x00040101,0x00000100,0x04040000};

DWORD DESSpBox4[]={
0x00401008,0x10001000,0x00000008,0x10401008,0x00000000,0x10400000,0x10001008,0x00400008,
0x10401000,0x10000008,0x10000000,0x00001008,0x10000008,0x00401008,0x00400000,0x10000000,
0x10400008,0x00401000,0x00001000,0x00000008,0x00401000,0x10001008,0x10400000,0x00001000,
0x00001008,0x00000000,0x00400008,0x10401000,0x10001000,0x10400008,0x10401008,0x00400000,
0x10400008,0x00001008,0x00400000,0x10000008,0x00401000,0x10001000,0x00000008,0x10400000,
0x10001008,0x00000000,0x00001000,0x00400008,0x00000000,0x10400008,0x10401000,0x00001000,
0x10000000,0x10401008,0x00401008,0x00400000,0x10401008,0x00000008,0x10001000,0x00401008,
0x00400008,0x00401000,0x10400000,0x10001008,0x00001008,0x10000000,0x10000008,0x10401000};

DWORD DESSpBox5[]={
0x08000000,0x00010000,0x00000400,0x08010420,0x08010020,0x08000400,0x00010420,0x08010000,
0x00010000,0x00000020,0x08000020,0x00010400,0x08000420,0x08010020,0x08010400,0x00000000,
0x00010400,0x08000000,0x00010020,0x00000420,0x08000400,0x00010420,0x00000000,0x08000020,
0x00000020,0x08000420,0x08010420,0x00010020,0x08010000,0x00000400,0x00000420,0x08010400,
0x08010400,0x08000420,0x00010020,0x08010000,0x00010000,0x00000020,0x08000020,0x08000400,
0x08000000,0x00010400,0x08010420,0x00000000,0x00010420,0x08000000,0x00000400,0x00010020,
0x08000420,0x00000400,0x00000000,0x08010420,0x08010020,0x08010400,0x00000420,0x00010000,
0x00010400,0x08010020,0x08000400,0x00000420,0x00000020,0x00010420,0x08010000,0x08000020};

DWORD DESSpBox6[]={
0x80000040,0x00200040,0x00000000,0x80202000,0x00200040,0x00002000,0x80002040,0x00200000,
0x00002040,0x80202040,0x00202000,0x80000000,0x80002000,0x80000040,0x80200000,0x00202040,
0x00200000,0x80002040,0x80200040,0x00000000,0x00002000,0x00000040,0x80202000,0x80200040,
0x80202040,0x80200000,0x80000000,0x00002040,0x00000040,0x00202000,0x00202040,0x80002000,
0x00002040,0x80000000,0x80002000,0x00202040,0x80202000,0x00200040,0x00000000,0x80002000,
0x80000000,0x00002000,0x80200040,0x00200000,0x00200040,0x80202040,0x00202000,0x00000040,
0x80202040,0x00202000,0x00200000,0x80002040,0x80000040,0x80200000,0x00202040,0x00000000,
0x00002000,0x80000040,0x80002040,0x80202000,0x80200000,0x00002040,0x00000040,0x80200040};

DWORD DESSpBox7[]={
0x00004000,0x00000200,0x01000200,0x01000004,0x01004204,0x00004004,0x00004200,0x00000000,
0x01000000,0x01000204,0x00000204,0x01004000,0x00000004,0x01004200,0x01004000,0x00000204,
0x01000204,0x00004000,0x00004004,0x01004204,0x00000000,0x01000200,0x01000004,0x00004200,
0x01004004,0x00004204,0x01004200,0x00000004,0x00004204,0x01004004,0x00000200,0x01000000,
0x00004204,0x01004000,0x01004004,0x00000204,0x00004000,0x00000200,0x01000000,0x01004004,
0x01000204,0x00004204,0x00004200,0x00000000,0x00000200,0x01000004,0x00000004,0x01000200,
0x00000000,0x01000204,0x01000200,0x00004200,0x00000204,0x00004000,0x01004204,0x01000000,
0x01004200,0x00000004,0x00004004,0x01004204,0x01000004,0x01004200,0x01004000,0x00004004};

DWORD DESSpBox8[]={
0x20800080,0x20820000,0x00020080,0x00000000,0x20020000,0x00800080,0x20800000,0x20820080,
0x00000080,0x20000000,0x00820000,0x00020080,0x00820080,0x20020080,0x20000080,0x20800000,
0x00020000,0x00820080,0x00800080,0x20020000,0x20820080,0x20000080,0x00000000,0x00820000,
0x20000000,0x00800000,0x20020080,0x20800080,0x00800000,0x00020000,0x20820000,0x00000080,
0x00800000,0x00020000,0x20000080,0x20820080,0x00020080,0x20000000,0x00000000,0x00820000,
0x20800080,0x20020080,0x20020000,0x00800080,0x20820000,0x00000080,0x00800080,0x20020000,
0x20820080,0x00800000,0x20800000,0x20000080,0x00820000,0x00020080,0x20020080,0x20800000,
0x00000080,0x20820000,0x00820080,0x00000000,0x20000000,0x20800080,0x00020000,0x00820080};

void wmain()
{
    HMODULE hNtdll = NULL;
    hNtdll = LoadLibrary( "ntdll.dll" );
    if ( !hNtdll )
    {
        printf( "LoadLibrary( NTDLL.DLL ) Error:%d\n", GetLastError() );
        return ;
    }
    RtlUpcaseUnicodeStringToOemString = (RTLUPCASEUNICODESTRINGTOOEMSTRING)
        GetProcAddress(    hNtdll,    "RtlUpcaseUnicodeStringToOemString");

    passtoowf(L"test");
}

void passtoowf(wchar_t * password)
{
    int len;
    int i;
    LSA_UNICODE_STRING pass;
    LSA_UNICODE_STRING opass;
    unsigned char upassword[0x10];
    unsigned char LM[0x20];
    
    len=0;
    for(i=0;i<0x20;i++)
    {
        if(password[i]==0 )
            break;
        len=len+2;
    }
    if(len>28)
    {
        printf("password <=14");
        return;
    }
    pass.Length=len;
    pass.MaximumLength=len;
    pass.Buffer=password;
    opass.MaximumLength=0xf;
    opass.Buffer=upassword;
    memset(upassword,0,0x10);
    RtlUpcaseUnicodeStringToOemString(&opass,&pass,0);
    initLMP(upassword,LM+0x10);
    initLMP(upassword+7,LM+0x18);
    initMDP(&pass,LM);
    printf("MD4:\n");
    for(i=0;i<16;i++)
        printf("%02X",LM[i]);
    printf(" DES:");
    for(i=0;i<16;i++)
        printf("%02X",LM[16+i]);
}

void initLMP(char * pass,unsigned char * LM)
{
    char LmPass[0x20];
    unsigned char desecb[128];
    DWORD d1,d2;
    unsigned char a1,a2;
    char a3[]={1,3,7,0xf,0x1f,0x3f,0x7f};
    int i;
    char magic1[8]="KGS!@#$%";

    for(i=0;i<8;i++)
    {
        if(i==0)
        {
            a1=pass[0];
            LmPass[0]=a1>>1;
        }
        else if(i==7)
        {
            a1=pass[i-1];
            a1=a1&a3[i-1];            
            LmPass[i]=a1;
        }
        else
        {
            a1=pass[i-1];
            a2=pass[i];
            a1=a1&a3[i-1];
            a1=a1<<(7-i);
            a2=a2>>(i+1);
            LmPass[i]=a1|a2;
        }
    }
    d1=*(DWORD *)LmPass;
    d2=*(DWORD *)(LmPass+4);
    d1=(d1&0xff7f7f7f)<<1;
    d2=(d2&0xff7f7f7f)<<1;
    *(DWORD *)LmPass=d1;
    *(DWORD *)(LmPass+4)=d2;
    //
    for(i=0;i<8;i++)
    {
        a1=LmPass[i];
        a2=a1;
        a1=a1&0xf;
        a2=a2>>4;
        a2=DESParity[a2];
        a1=DESParity[a1];
        a2=a1+a2;
        a2=a2^a1;
        a2=a2-a1;
        a2=a2&1;
        a2=a2^a1;
        a2=a2-a1;
        if(a2==0)
            LmPass[i]=LmPass[i]^1;
    }
    deskey(LmPass,desecb);
    des(LM,magic1,desecb,1);
}

void deskey(char * LmPass,unsigned char * desecb)
{
    int i;
    unsigned char a1;
    DWORD d1,d2,d3,d4,d5,d6;


    d1=*(DWORD *)LmPass;
    d2=*(DWORD *)(LmPass+4);
    d2=d2>>4;
    d1=d1&0xf0f0f0f;
    d2=d2&0xf0f0f0f;
    d2=d2^d1;
    d1=*(DWORD *)LmPass^d2;
    d2=d2<<4;
    d2=*(DWORD *)(LmPass+4)^d2;
    d3=d1&0xfffff333;
    d3=d3<<0x12;
    d4=d1&0xcccc0000;
    d4=d4^d3;
    d3=d4;
    d3=d3>>0x12;
    d3=d3^d4;
    d1=d1^d3;
    d3=d2&0xfffff333;
    d3=d3<<0x12;
    d4=d2&0xcccc0000;
    d4=d4^d3;
    d3=d3>>0x12;
    d3=d3^d4;
    d2=d2^d3;
    d3=d1;
    d4=d2>>1;
    d3=d3&0x55555555;
    d4=d4&0x55555555;
    d4=d4^d3;
    d1=d1^d4;
    d4=d4+d4;
    d2=d2^d4;
    d4=d1>>8;
    d3=d2&0xff00ff;
    d4=d4&0xff00ff;
    d4=d4^d3;
    d2=d2^d4;
    d4=d4<<8;
    d1=d1^d4;
    d4=d2>>1;
    d3=d1;
    d3=d3&0x55555555;
    d4=d4&0x55555555;
    d4=d4^d3;
    d1=d1^d4;
    d4=d4+d4;
    d2=d2^d4;
    d3=d1&0xf000000f;
    d4=(d2>>0xc)&0xff0;
    d1=d1&0x0fffffff;
    d3=(d3|d4)>>4;
    d4=d2&0xff00;
    d2=(d2&0xff)<<0x10;
    d3=d3|d4;
    d3=d3|d2;
    for(i=0;i<16;i++)
    {
        d2=d1;
        a1=DESDShift[i];
        if(a1==0)
        {
            d2=d2>>1;
            d1=d1<<0x1b;
            d4=d3>>1;
            d3=d3<<0x1b;
            d1=d1|d2;            
        }
        else
        {
            d2=d2>>2;
            d1=d1<<0x1a;
            d4=d3>>2;
            d3=d3<<0x1a;
            d1=d1|d2;
        }
        d1=d1&0x0fffffff;
        d3=d3|d4;
        d2=d1>>1;
        d4=d1&0xc00000;
        d4=d4|(d2&0x07000000);
        d4=(d4>>1)|(d1&0x00100000);
        //d6=d2&0x00060000;
        d5=(d1&0x0001e000)|(d2&0x00060000);
        d2=d2&0x00000f00;
        d3=d3&0x0fffffff;
        d5=d5>>0xd;