From 3e4d8f433239c40311037616b1b8833a06651ae0 Mon Sep 17 00:00:00 2001
From: Arne Schwabe <arne@rfc2549.org>
Date: Mon, 16 Apr 2012 19:21:14 +0200
Subject: Initial import

---
 openssl/crypto/bn/exp.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 openssl/crypto/bn/exp.c

(limited to 'openssl/crypto/bn/exp.c')

diff --git a/openssl/crypto/bn/exp.c b/openssl/crypto/bn/exp.c
new file mode 100644
index 00000000..4865b0ef
--- /dev/null
+++ b/openssl/crypto/bn/exp.c
@@ -0,0 +1,62 @@
+/* unused */
+
+#include <stdio.h>
+#include <openssl/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;
+		}
+
+	}
-- 
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