?? rc4s.cpp
字號:
//// gettsc.inl//// gives access to the Pentium's (secret) cycle counter//// This software was written by Leonard Janke (janke@unixg.ubc.ca)// in 1996-7 and is entered, by him, into the public domain.#if defined(__WATCOMC__)void GetTSC(unsigned long&);#pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax];#elif defined(__GNUC__)inlinevoid GetTSC(unsigned long& tsc){ asm volatile(".byte 15, 49\n\t" : "=eax" (tsc) : : "%edx", "%eax");}#elif defined(_MSC_VER)inlinevoid GetTSC(unsigned long& tsc){ unsigned long a; __asm _emit 0fh __asm _emit 31h __asm mov a, eax; tsc=a;}#endif #include <stdio.h>#include <stdlib.h>#include <openssl/rc4.h>void main(int argc,char *argv[]) { unsigned char buffer[1024]; RC4_KEY ctx; unsigned long s1,s2,e1,e2; unsigned char k[16]; unsigned long data[2]; unsigned char iv[8]; int i,num=64,numm; int j=0; if (argc >= 2) num=atoi(argv[1]); if (num == 0) num=256; if (num > 1024-16) num=1024-16; numm=num+8; for (j=0; j<6; j++) { for (i=0; i<10; i++) /**/ { RC4(&ctx,numm,buffer,buffer); GetTSC(s1); RC4(&ctx,numm,buffer,buffer); GetTSC(e1); GetTSC(s2); RC4(&ctx,num,buffer,buffer); GetTSC(e2); RC4(&ctx,num,buffer,buffer); } printf("RC4 (%d bytes) %d %d (%d) - 8 bytes\n",num, e1-s1,e2-s2,(e1-s1)-(e2-s2)); } }
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