rc4speed.c

mediastreamer2是开源的网络传输媒体流的库

/* crypto/rc4/rc4speed.c */
/* Copyright (C) 1995-1998 Eric Young ([e-mail])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([e-mail]).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson ([e-mail]).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young ([e-mail])"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson ([e-mail])"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

/* 11-Sep-92 Andrew Daviel   Support for Silicon Graphics IRIX added */
/* 06-Apr-92 Luke Brennan    Support for VMS and add extra signal calls */

#if !defined(OPENSSL_SYS_MSDOS) && (!defined(OPENSSL_SYS_VMS) || defined(__DECC)) && !defined(OPENSSL_SYS_MACOSX)
#define TIMES
#endif

#include <stdio.h>

#include <openssl/e_os2.h>
#include OPENSSL_UNISTD_IO
OPENSSL_DECLARE_EXIT

#ifndef OPENSSL_SYS_NETWARE
#include <signal.h>
#endif

#ifndef _IRIX
#include <time.h>
#endif
#ifdef TIMES
#include <sys/types.h>
#include <sys/times.h>
#endif

/* Depending on the VMS version, the tms structure is perhaps defined.
   The __TMS macro will show if it was.  If it wasn't defined, we should
   undefine TIMES, since that tells the rest of the program how things
   should be handled.				-- Richard Levitte */
#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__TMS)
#undef TIMES
#endif

#ifndef TIMES
#include <sys/timeb.h>
#endif

#if defined(sun) || defined(__ultrix)
#define _POSIX_SOURCE
#include <limits.h>
#include <sys/param.h>
#endif

#include <openssl/rc4.h>

/* The following if from times(3) man page.  It may need to be changed */
#ifndef HZ
#ifndef CLK_TCK
#define HZ	100.0
#else /* CLK_TCK */
#define HZ ((double)CLK_TCK)
#endif
#endif

#define BUFSIZE	((long)1024)
long run=0;

double Time_F(int s);
#ifdef SIGALRM
#if defined(__STDC__) || defined(sgi) || defined(_AIX)
#define SIGRETTYPE void
#else
#define SIGRETTYPE int
#endif

SIGRETTYPE sig_done(int sig);
SIGRETTYPE sig_done(int sig)
	{
	signal(SIGALRM,sig_done);
	run=0;
#ifdef LINT
	sig=sig;
#endif
	}
#endif

#define START	0
#define STOP	1

double Time_F(int s)
	{
	double ret;
#ifdef TIMES
	static struct tms tstart,tend;

	if (s == START)
		{
		times(&tstart);
		return(0);
		}
	else
		{
		times(&tend);
		ret=((double)(tend.tms_utime-tstart.tms_utime))/HZ;
		return((ret == 0.0)?1e-6:ret);
		}
#else /* !times() */
	static struct timeb tstart,tend;
	long i;

	if (s == START)
		{
		ftime(&tstart);
		return(0);
		}
	else
		{
		ftime(&tend);
		i=(long)tend.millitm-(long)tstart.millitm;
		ret=((double)(tend.time-tstart.time))+((double)i)/1e3;
		return((ret == 0.0)?1e-6:ret);
		}
#endif
	}

int main(int argc, char **argv)
	{
	long count;
	static unsigned char buf[BUFSIZE];
	static unsigned char key[] ={
			0x12,0x34,0x56,0x78,0x9a,0xbc,0xde,0xf0,
			0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,
			};
	RC4_KEY sch;
	double a,b,c,d;
#ifndef SIGALRM
	long ca,cb,cc;
#endif

#ifndef TIMES
	printf("To get the most accurate results, try to run this\n");
	printf("program when this computer is idle.\n");
#endif

#ifndef SIGALRM
	printf("First we calculate the approximate speed ...\n");
	RC4_set_key(&sch,16,key);
	count=10;
	do	{
		long i;
		unsigned long data[2];

		count*=2;
		Time_F(START);
		for (i=count; i; i--)
			RC4(&sch,8,buf,buf);
		d=Time_F(STOP);
		} while (d < 3.0);
	ca=count/512;
	cc=count*8/BUFSIZE+1;
	printf("Doing RC4_set_key %ld times\n",ca);
#define COND(d)	(count != (d))
#define COUNT(d) (d)
#else
#define COND(c)	(run)
#define COUNT(d) (count)
	signal(SIGALRM,sig_done);
	printf("Doing RC4_set_key for 10 seconds\n");
	alarm(10);
#endif

	Time_F(START);
	for (count=0,run=1; COND(ca); count+=4)
		{
		RC4_set_key(&sch,16,key);
		RC4_set_key(&sch,16,key);
		RC4_set_key(&sch,16,key);
		RC4_set_key(&sch,16,key);
		}
	d=Time_F(STOP);
	printf("%ld RC4_set_key's in %.2f seconds\n",count,d);
	a=((double)COUNT(ca))/d;

#ifdef SIGALRM
	printf("Doing RC4 on %ld byte blocks for 10 seconds\n",BUFSIZE);
	alarm(10);
#else
	printf("Doing RC4 %ld times on %ld byte blocks\n",cc,BUFSIZE);
#endif
	Time_F(START);
	for (count=0,run=1; COND(cc); count++)
		RC4(&sch,BUFSIZE,buf,buf);
	d=Time_F(STOP);
	printf("%ld RC4's of %ld byte blocks in %.2f second\n",
		count,BUFSIZE,d);
	c=((double)COUNT(cc)*BUFSIZE)/d;

	printf("RC4 set_key per sec = %12.2f (%9.3fuS)\n",a,1.0e6/a);
	printf("RC4   bytes per sec = %12.2f (%9.3fuS)\n",c,8.0e6/c);
	exit(0);
#if defined(LINT) || defined(OPENSSL_SYS_MSDOS)
	return(0);
#endif
	}