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 (at) 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 <openssl/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 74
