times/x86/rc4s.cpp

   1 //
   2 // gettsc.inl
   3 //
   4 // gives access to the Pentium's (secret) cycle counter
   5 //
   6 // This software was written by Leonard Janke (janke@unixg.ubc.ca)
   7 // in 1996-7 and is entered, by him, into the public domain.
   8
   9 #if defined(__WATCOMC__)
  10 void GetTSC(unsigned long&);
  11 #pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax];
  12 #elif defined(__GNUC__)
  13 inline
  14 void GetTSC(unsigned long& tsc)
  15 {
  16   asm volatile(".byte 15, 49\n\t"
  17                : "=eax" (tsc)
  18                :
  19                : "%edx", "%eax");
  20 }
  21 #elif defined(_MSC_VER)
  22 inline
  23 void GetTSC(unsigned long& tsc)
  24 {
  25   unsigned long a;
  26   __asm _emit 0fh
  27   __asm _emit 31h
  28   __asm mov a, eax;
  29   tsc=a;
  30 }
  31 #endif
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include "rc4.h"
  36
  37 void main(int argc,char *argv[])
  38         {
  39         unsigned char buffer[1024];
  40         RC4_KEY ctx;
  41         unsigned long s1,s2,e1,e2;
  42         unsigned char k[16];
  43         unsigned long data[2];
  44         unsigned char iv[8];
  45         int i,num=64,numm;
  46         int j=0;
  47
  48         if (argc >= 2)
  49                 num=atoi(argv[1]);
  50
  51         if (num == 0) num=256;
  52         if (num > 1024-16) num=1024-16;
  53         numm=num+8;
  54
  55         for (j=0; j<6; j++)
  56                 {
  57                 for (i=0; i<10; i++) /**/
  58                         {
  59                         RC4(&ctx,numm,buffer,buffer);
  60                         GetTSC(s1);
  61                         RC4(&ctx,numm,buffer,buffer);
  62                         GetTSC(e1);
  63                         GetTSC(s2);
  64                         RC4(&ctx,num,buffer,buffer);
  65                         GetTSC(e2);
  66                         RC4(&ctx,num,buffer,buffer);
  67                         }
  68
  69                 printf("RC4 (%d bytes) %d %d (%d) - 8 bytes\n",num,
  70                         e1-s1,e2-s2,(e1-s1)-(e2-s2));
  71                 }
  72         }
  73