des_opts.c

本软件是根据DES加密算法

#include "des_enc.c"

#endif

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

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

#ifndef NOPROTO
double Time_F(int s);
#else
double Time_F();
#endif

#ifdef SIGALRM
#if defined(__STDC__) || defined(sgi)
#define SIGRETTYPE void
#else
#define SIGRETTYPE int
#endif

#ifndef NOPROTO
SIGRETTYPE sig_done(int sig);
#else
SIGRETTYPE sig_done();
#endif

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

#define START	0
#define STOP	1

double Time_F(s)
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)/1000.0;
		return((ret == 0.0)?1e-6:ret);
		}
#endif
	}

#ifdef SIGALRM
#define print_name(name) fprintf(stderr,"Doing %s's for 10 seconds\n",name); alarm(10);
#else
#define print_name(name) fprintf(stderr,"Doing %s %ld times\n",name,cb);
#endif
	
#define time_it(func,name,index) \
	print_name(name); \
	Time_F(START); \
	for (count=0,run=1; COND(cb); count++) \
		{ \
		unsigned long d[2]; \
		func(d,&(sch[0]),DES_ENCRYPT); \
		} \
	tm[index]=Time_F(STOP); \
	fprintf(stderr,"%ld %s's in %.2f second\n",count,name,tm[index]); \
	tm[index]=((double)COUNT(cb))/tm[index];

#define print_it(name,index) \
	fprintf(stderr,"%s bytes per sec = %12.2f (%5.1fuS)\n",name, \
		tm[index]*8,1.0e6/tm[index]);

int main(argc,argv)
int argc;
char **argv;
	{
	long count;
	static unsigned char buf[BUFSIZE];
	static des_cblock key ={0x12,0x34,0x56,0x78,0x9a,0xbc,0xde,0xf0};
	static des_cblock key2={0x34,0x56,0x78,0x9a,0xbc,0xde,0xf0,0x12};
	static des_cblock key3={0x56,0x78,0x9a,0xbc,0xde,0xf0,0x12,0x34};
	des_key_schedule sch,sch2,sch3;
	double d,tm[16],max=0;
	int rank[16];
	char *str[16];
	int max_idx=0,i,num=0,j;
#ifndef SIGALARM
	long ca,cb,cc,cd,ce;
#endif

	for (i=0; i<12; i++)
		{
		tm[i]=0.0;
		rank[i]=0;
		}

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

	des_set_key((C_Block *)key,sch);
	des_set_key((C_Block *)key2,sch2);
	des_set_key((C_Block *)key3,sch3);

#ifndef SIGALRM
	fprintf(stderr,"First we calculate the approximate speed ...\n");
	des_set_key((C_Block *)key,sch);
	count=10;
	do	{
		long i;
		unsigned long data[2];

		count*=2;
		Time_F(START);
		for (i=count; i; i--)
			des_encrypt(data,&(sch[0]),DES_ENCRYPT);
		d=Time_F(STOP);
		} while (d < 3.0);
	ca=count;
	cb=count*3;
	cc=count*3*8/BUFSIZE+1;
	cd=count*8/BUFSIZE+1;

	ce=count/20+1;
#define COND(d) (count != (d))
#define COUNT(d) (d)
#else
#define COND(c) (run)
#define COUNT(d) (count)
        signal(SIGALRM,sig_done);
        alarm(10);
#endif

#ifdef PART1
	time_it(des_encrypt_u4_cisc_idx,  "des_encrypt_u4_cisc_idx  ", 0);
	time_it(des_encrypt_u16_cisc_idx, "des_encrypt_u16_cisc_idx ", 1);
	time_it(des_encrypt_u4_risc1_idx, "des_encrypt_u4_risc1_idx ", 2);
	num+=3;
#endif
#ifdef PART2
	time_it(des_encrypt_u16_risc1_idx,"des_encrypt_u16_risc1_idx", 3);
	time_it(des_encrypt_u4_risc2_idx, "des_encrypt_u4_risc2_idx ", 4);
	time_it(des_encrypt_u16_risc2_idx,"des_encrypt_u16_risc2_idx", 5);
	num+=3;
#endif
#ifdef PART3
	time_it(des_encrypt_u4_cisc_ptr,  "des_encrypt_u4_cisc_ptr  ", 6);
	time_it(des_encrypt_u16_cisc_ptr, "des_encrypt_u16_cisc_ptr ", 7);
	time_it(des_encrypt_u4_risc1_ptr, "des_encrypt_u4_risc1_ptr ", 8);
	num+=3;
#endif
#ifdef PART4
	time_it(des_encrypt_u16_risc1_ptr,"des_encrypt_u16_risc1_ptr", 9);
	time_it(des_encrypt_u4_risc2_ptr, "des_encrypt_u4_risc2_ptr ",10);
	time_it(des_encrypt_u16_risc2_ptr,"des_encrypt_u16_risc2_ptr",11);
	num+=3;
#endif

#ifdef PART1
	str[0]=" 4  c i";
	print_it("des_encrypt_u4_cisc_idx  ",0);
	max=tm[0];
	max_idx=0;
	str[1]="16  c i";
	print_it("des_encrypt_u16_cisc_idx ",1);
	if (max < tm[1]) { max=tm[1]; max_idx=1; }
	str[2]=" 4 r1 i";
	print_it("des_encrypt_u4_risc1_idx ",2);
	if (max < tm[2]) { max=tm[2]; max_idx=2; }
#endif
#ifdef PART2
	str[3]="16 r1 i";
	print_it("des_encrypt_u16_risc1_idx",3);
	if (max < tm[3]) { max=tm[3]; max_idx=3; }
	str[4]=" 4 r2 i";
	print_it("des_encrypt_u4_risc2_idx ",4);
	if (max < tm[4]) { max=tm[4]; max_idx=4; }
	str[5]="16 r2 i";
	print_it("des_encrypt_u16_risc2_idx",5);
	if (max < tm[5]) { max=tm[5]; max_idx=5; }
#endif
#ifdef PART3
	str[6]=" 4  c p";
	print_it("des_encrypt_u4_cisc_ptr  ",6);
	if (max < tm[6]) { max=tm[6]; max_idx=6; }
	str[7]="16  c p";
	print_it("des_encrypt_u16_cisc_ptr ",7);
	if (max < tm[7]) { max=tm[7]; max_idx=7; }
	str[8]=" 4 r1 p";
	print_it("des_encrypt_u4_risc1_ptr ",8);
	if (max < tm[8]) { max=tm[8]; max_idx=8; }
#endif
#ifdef PART4
	str[9]="16 r1 p";
	print_it("des_encrypt_u16_risc1_ptr",9);
	if (max < tm[9]) { max=tm[9]; max_idx=9; }
	str[10]=" 4 r2 p";
	print_it("des_encrypt_u4_risc2_ptr ",10);
	if (max < tm[10]) { max=tm[10]; max_idx=10; }
	str[11]="16 r2 p";
	print_it("des_encrypt_u16_risc2_ptr",11);
	if (max < tm[11]) { max=tm[11]; max_idx=11; }
#endif
	printf("options    des ecb/s\n");
	printf("%s %12.2f 100.0%%\n",str[max_idx],tm[max_idx]);
	d=tm[max_idx];
	tm[max_idx]= -2.0;
	max= -1.0;
	for (;;)
		{
		for (i=0; i<12; i++)
			{
			if (max < tm[i]) { max=tm[i]; j=i; }
			}
		if (max < 0.0) break;
		printf("%s %12.2f  %4.1f%%\n",str[j],tm[j],tm[j]/d*100.0);
		tm[j]= -2.0;
		max= -1.0;
		}

	switch (max_idx)
		{
	case 0:
		printf("-DDES_DEFAULT_OPTIONS\n");
		break;
	case 1:
		printf("-DDES_UNROLL\n");
		break;
	case 2:
		printf("-DDES_RISC1\n");
		break;
	case 3:
		printf("-DDES_UNROLL -DDES_RISC1\n");
		break;
	case 4:
		printf("-DDES_RISC2\n");
		break;
	case 5:
		printf("-DDES_UNROLL -DDES_RISC2\n");
		break;
	case 6:
		printf("-DDES_PTR\n");
		break;
	case 7:
		printf("-DDES_UNROLL -DDES_PTR\n");
		break;
	case 8:
		printf("-DDES_RISC1 -DDES_PTR\n");
		break;
	case 9:
		printf("-DDES_UNROLL -DDES_RISC1 -DDES_PTR\n");
		break;
	case 10:
		printf("-DDES_RISC2 -DDES_PTR\n");
		break;
	case 11:
		printf("-DDES_UNROLL -DDES_RISC2 -DDES_PTR\n");
		break;
		}
	exit(0);
#if defined(LINT) || defined(MSDOS)
	return(0);
#endif
	}