Import of old SSLeay release: SSLeay 0.9.1b (unreleased)

crypto/bn/exp.c

@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include "tmdiff.h"
+#include "bn_lcl.h"
+
+#define SIZE	256
+#define NUM	(8*8*8)
+#define MOD	(8*8*8*8*8)
+
+main(argc,argv)
+int argc;
+char *argv[];
+	{
+	BN_CTX ctx;
+	BIGNUM a,b,c,r,rr,t,l;
+	int j,i,size=SIZE,num=NUM,mod=MOD;
+	char *start,*end;
+	BN_MONT_CTX mont;
+	double d,md;
+
+	BN_MONT_CTX_init(&mont);
+	BN_CTX_init(&ctx);
+	BN_init(&a);
+	BN_init(&b);
+	BN_init(&c);
+	BN_init(&r);
+
+	start=ms_time_new();
+	end=ms_time_new();
+	while (size <= 1024*8)
+		{
+		BN_rand(&a,size,0,0);
+		BN_rand(&b,size,1,0);
+		BN_rand(&c,size,0,1);
+
+		BN_mod(&a,&a,&c,&ctx);
+
+		ms_time_get(start);
+		for (i=0; i<10; i++)
+			BN_MONT_CTX_set(&mont,&c,&ctx);
+		ms_time_get(end);
+		md=ms_time_diff(start,end);
+
+		ms_time_get(start);
+		for (i=0; i<num; i++)
+			{
+			//bn_mull(&r,&a,&b,&ctx);
+			//BN_sqr(&r,&a,&ctx);
+			BN_mod_exp_mont(&r,&a,&b,&c,&ctx,&mont);
+			}
+		ms_time_get(end);
+		d=ms_time_diff(start,end) *50/33 /**/;
+		printf("%5d bit:%6.2f %6d %6.4f %4d m_set(%5.4f)\n",size,
+			d,num,d/num,(int)((d/num)*mod),md/10.0);
+		num/=8;
+		mod/=8;
+		if (num <= 0) num=1;
+		size*=2;
+		}
+
+	}