mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-01 05:55:18 +00:00
74 lines
1.4 KiB
C++
74 lines
1.4 KiB
C++
//
|
|
// 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__)
|
|
inline
|
|
void GetTSC(unsigned long& tsc)
|
|
{
|
|
asm volatile(".byte 15, 49\n\t"
|
|
: "=eax" (tsc)
|
|
:
|
|
: "%edx", "%eax");
|
|
}
|
|
#elif defined(_MSC_VER)
|
|
inline
|
|
void 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));
|
|
}
|
|
}
|
|
|