chkpin.c

证券交易系统

#include <stdio.h>
#include "all.h"

static unsigned char C[17][28],D[17][28],K[17][48],c,ch;

chg_mstkey(mstkey)
unsigned char *mstkey;
{
       int i;
       unsigned char chgmst[45];

       strcpy( chgmst, "9835jfdks9832ljkdsfj8rmcd4kjg743hfd" );
       for(i=0;i<8;i++) mstkey[i]^=chgmst[i+14];
}

get_pinkey( pinkey )
char       * pinkey;
{
       FILE  *fp;
       unsigned char  buf[20];
       unsigned char  mstkey[10];

       if ((fp=fopen((char *)getfname(WORKDIR,"/etc/pinkey"),"r+b")) == NULL)
           return( -1 );

       if( fread(buf,1,16,fp)==16 ) {

            memcpy(mstkey,buf,8);
            chg_mstkey(mstkey);
            mstkey[9]=0;

            _DES(mstkey,buf+8,pinkey);
            pinkey[8]=0;                   /* PIN KEY */

       }

        fclose(fp);
        return(0);
}

int strtoint(s, i)
char *s;
int i;
{
       int j, r;
       
       r=0;
       for (j=0; j<i; j++)
              r=r*10+(s[j]-'0');
       return r;
}

btodmod(source, dest)
/* Convert Binary to Decimal with Modulation 100000 */
/* Input : 8 Bytes Binary  */
/* Output: 5 Bytes Decimal */
unsigned char *source, *dest;
{
     register     i;
     unsigned int wsrc;
     /* Table for binary to decimal conversion with modulation of 100000 */
     static int   table[64] = {
                      1,     2,     4,     8,    16,    32,    64,   128,
                    256,   512,  1024,  2048,  4096,  8192, 16384, 32768,
                  65536, 31072, 62144, 24288, 48576, 97152, 94304, 88608, 
                  77216, 54432,  8864, 17728, 35456, 70912, 41824, 83648,
                  67296, 34592, 69184, 38368, 76736, 53472,  6944, 13888,
                  27776, 55552, 11104, 22208, 44416, 88832, 77664, 55328,
                  10656, 21312, 42624, 85248, 70496, 40992, 81984, 63968,
                27936, 55872, 11744, 23488, 46976, 93952, 87904, 75808};

     wsrc=0;
     for (i=0;i<8;i++)
     {
         if ((*(source+i) & 128) == 128)
            wsrc+=table[64-i*8-1];
         if ((*(source+i) & 64) == 64)
            wsrc+=table[64-i*8-2];
         if ((*(source+i) & 32) == 32)
            wsrc+=table[64-i*8-3];
         if ((*(source+i) & 16) == 16)
            wsrc+=table[64-i*8-4];
         if ((*(source+i) & 8) == 8)
            wsrc+=table[64-i*8-5];
         if ((*(source+i) & 4) == 4)
            wsrc+=table[64-i*8-6];
         if ((*(source+i) & 2) == 2)
            wsrc+=table[64-i*8-7];
         if ((*(source+i) & 1) == 1)
            wsrc+=table[64-i*8-8];
     }
     for (i=4;i>=0;i--)
     {
        *(dest+i) = wsrc%10 + '0';
         wsrc = wsrc/10;  
     }
}


int       CBC_pin_chk ( pinkey, card, pin, offset )
char       * pinkey,       * card,       * pin,       * offset;
{
       register  i,j,j0,j1;
       char      acct[ 20 ],K[ 10 ],U[ 10 ];


       strcpy ( acct, card );                        /* account 16 ==> 17 */
       switch ( acct[ 0 ] ) {
              case '4': acct[ 16 ] = '0'; break;     /* VISA           '0' */
              case '5': acct[ 16 ] = '1'; break;     /* MASTER   '1' */
              case '6': acct[ 16 ] = acct[5];        /* DEPOSIT  '9' */
       }                                             /* GOLDEN   '8' */

                                                     /* K = bcd(account) */
       if( acct[0] == '6' && acct[5] == '9' )        /* DEPOSIT first 16 */
              for ( i=0; i<8; i++ )
                     K[i] = ((acct[2*i]&0x0f)<<4) | (acct[2*i+1] & 0x0f);
       else
              for ( i=0; i<8; i++ )                  /* CREDIT last 16 */
                     K[i] = ((acct[2*i+1]&0x0f)<<4) | (acct[2*i+2] & 0x0f);

       DES ( pinkey, K, U );                         /* U = DES ( K ) */
       btodmod ( (unsigned char *)U, (unsigned char *)K );       /* K ==> U */

       i = strtoint ( K, 5 );                        /* K =? pin - offset */
       j0= strtoint ( pin, 5 );
       j1= strtoint ( offset, 5 );
       j = ( 100000 + j0 - j1 ) % 100000;

       #ifdef       DBG
              printf( "K[%d]  pin[%d]  offset[%d] pin-offset[%d]\n",
                     i, j0, j1, j );
       #endif

       if ( i != j )
              return ( -1 );

       j = 0;                                        /* pin checksum */
       for ( i=6; i>0; i-- )
              j += ( pin[6-i] & 0x0f ) * i;
       j = ( 10 - (j % 10) ) % 10;

       #ifdef       DBG
              printf( "offset[5][%02x] =? [%d]\n", offset[5], j );
       #endif

       if ( (offset[5] & 0x0f) != j )              /* offset[5] =? pin checksum */
              return(-2);

       return(0);
}


DES(key,text,mtext)
unsigned char *text,*mtext,*key;
{
       unsigned char tmp[64];
       expand0(key,tmp);
       setkeystar(tmp);
       encrypt0(text,mtext);
}
_DES(key,text,mtext)
unsigned char *text,*mtext,*key;
{
       unsigned char tmp[64];
       expand0(key,tmp);
       setkeystar(tmp);
       discrypt0(text,mtext);
}
encrypt0(text,mtext)
unsigned char *text,*mtext;
{
       unsigned char ll[64],rr[64],LL[64],RR[64];
       unsigned char tmp[64];
       int i,j;
       ip(text,ll,rr);

       for (i=1;i<17;i++)
       {
              F(i,ll,rr,LL,RR);
              for (j=0;j<32;j++)
              {
                     ll[j]=LL[j];
                     rr[j]=RR[j];
              }
       }

       _ip(tmp,rr,ll);

       compress0(tmp,mtext);
}



discrypt0(mtext,text)
unsigned char *text,*mtext;
{
       unsigned char ll[64],rr[64],LL[64],RR[64];
       unsigned char tmp[64];
       int i,j;
       ip(mtext,ll,rr);

       for (i=16;i>0;i--)
       {
              F(i,ll,rr,LL,RR);
              for (j=0;j<32;j++)
              {
                     ll[j]=LL[j];
                     rr[j]=RR[j];
              }
       }

       _ip(tmp,rr,ll);

       compress0(tmp,text);
}



expand0(in,out)
unsigned char *in;
unsigned char *out;
{
       int divide;
       int i,j;

       for (i=0;i<8;i++)
       {
              divide=0x80;
              for (j=0;j<8;j++)
              {
                     *out++=((in[i]/divide)&1);
                     divide/=2;
              }
       }
}


compress0(out,in)
unsigned char *in;
unsigned char *out;
{
       int times;
       int i,j;

       for (i=0;i<8;i++)
       {
              times=0x80;
              in[i]=0;
              for (j=0;j<8;j++)
              {
                     in[i]+=(*out++)*times;
                     times/=2;
              }
       }
}
compress016(out,in)
unsigned char *in;
unsigned char *out;
{
       int times;
       int i,j;

       for (i=0;i<16;i++)
       {
              times=0x8;
              in[i]='0';
              for (j=0;j<4;j++)
              {
                     in[i]+=(*out++)*times;
                     times/=2;
              }
       }
}

int pc_1_c[28]={
       57,49,41,33,25,17,9
       ,1,58,50,42,34,26,18
       ,10,2,59,51,43,35,27
       ,19,11,3,60,52,44,36};
int pc_1_d[28]={
       63,55,47,39,31,23,15
       ,7,62,54,46,38,30,22
       ,14,6,61,53,45,37,29
       ,21,13,5,28,20,12,4};
int pc_2[48]={
       14,17,11,24,1,5,
       3,28,15,6,21,10,
       23,19,12,4,26,8,
       16,7,27,20,13,2,
       41,52,31,37,47,55,
       30,40,51,45,33,48,
       44,49,39,56,34,53,
       46,42,50,36,29,32};

int ls_count[16]={
       1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};

setkeystar(bits)
unsigned char bits[64];
{
       int i,j;

       for (i=0;i<28;i++)
              C[0][i]=bits[pc_1_c[i]-1];
       for (i=0;i<28;i++)
              D[0][i]=bits[pc_1_d[i]-1];
       for (j=0;j<16;j++)
       {
              LS(C[j],C[j+1],ls_count[j]);
              LS(D[j],D[j+1],ls_count[j]);
              son(C[j+1],D[j+1],K[j+1]);
       }
}


LS(bits,buffer,count)
unsigned char *bits;
int count;
unsigned char *buffer;
{
       int i,j;
       for (i=0;i<28;i++)
       {
              buffer[i]=bits[(i+count)%28];
       }
}

son(cc,dd,kk)
unsigned char *cc,*dd,*kk;
{
       int i,j;
       unsigned char buffer[56];
       for (i=0;i<28;i++)
              buffer[i]=*cc++;

       for (i=28;i<56;i++)
              buffer[i]=*dd++;

       for (i=0;i<48;i++)
              *kk++=buffer[pc_2[i]-1];
}

int ip_tab[64]={
       58,50,42,34,26,18,10,2,
       60,52,44,36,28,20,12,4,
       62,54,46,38,30,22,14,6,
       64,56,48,40,32,24,16,8,
       57,49,41,33,25,17,9,1,
       59,51,43,35,27,19,11,3,
       61,53,45,37,29,21,13,5,
       63,55,47,39,31,23,15,7};
int _ip_tab[64]={
       40,8,48,16,56,24,64,32,
       39,7,47,15,55,23,63,31,
       38,6,46,14,54,22,62,30,
       37,5,45,13,53,21,61,29,
       36,4,44,12,52,20,60,28,
       35,3,43,11,51,19,59,27,
       34,2,42,10,50,18,58,26,
       33,1,41,9,49,17,57,25};

ip(text,ll,rr)
unsigned char *text;
unsigned char *ll,*rr;
{
       int i,j;
       unsigned char buffer[64];
       unsigned char tmp[64];
       expand0(text,buffer);

       for (i=0;i<32;i++)
              ll[i]=buffer[ip_tab[i]-1];

       for (i=0;i<32;i++)
              rr[i]=buffer[ip_tab[i+32]-1];
}

_ip(text,ll,rr)
unsigned char *text;
unsigned char *ll,*rr;
{
       int i,j;
       unsigned char tmp[64];
       for (i=0;i<32;i++)
              tmp[i]=ll[i];
       for (i=32;i<64;i++)
              tmp[i]=rr[i-32];
       for (i=0;i<64;i++)
              text[i]=tmp[_ip_tab[i]-1];
}


int e_r[48]={
       32,1,2,3,4,5,4,5,6,7,8,9,
       8,9,10,11,12,13,12,13,14,15,16,17,
       16,17,18,19,20,21,20,21,22,23,24,25,
       24,25,26,27,28,29,28,29,30,31,32,1};

int P[32]={
       16,7,20,21,29,12,28,17,
       1,15,23,26,5,18,31,10,
       2,8,24,14,32,27,3,9,
       19,13,30,6,22,11,4,25};
int SSS[16][4][16]={
       14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,
       0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8,/* err on */
       4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0,
       15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13,

       15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,
       3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,
       0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,
       13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9,

       10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,
       13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,
       13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7,
       1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12,

       7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,
       13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,
       10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,
       3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14, /* err on */

       2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,
       14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6, /* err on */
       4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14,
       11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3,

       12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,
       10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,
       9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,
       4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13,

       4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,
       13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,
       1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2,
       6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12,

       13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,
       1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,
       7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8,
       2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11};

F(n,ll,rr,LL,RR)
unsigned char *ll,*rr,*LL,*RR;
int n;
{
       int i,j;
       unsigned char buffer[64],tmp[64];
       for (i=0;i<48;i++)
              buffer[i]=rr[e_r[i]-1];
       for (i=0;i<48;i++)
              buffer[i]=(buffer[i]+K[n][i])&1;

       s_box(buffer,tmp);

       for (i=0;i<32;i++)
              buffer[i]=tmp[P[i]-1];

       for (i=0;i<32;i++)
              RR[i]=(buffer[i]+ll[i])&1;

       for (i=0;i<32;i++)
              LL[i]=rr[i];


}

s_box(aa,bb)
unsigned char *aa,*bb;
{
       int i,j,k,m;
       int y,z;
       unsigned char ss[8];
       m=0;
       for (i=0;i<8;i++)
       {
              j=6*i;
              y=aa[j]*2+aa[j+5];
              z=aa[j+1]*8+aa[j+2]*4+aa[j+3]*2+aa[j+4];
              ss[i]=SSS[i][y][z];
              y=0x08;
              for (k=0;k<4;k++)
              {
                     bb[m++]=(ss[i]/y)&1;
                     y/=2;
              }

       }
}