1 files changed, 62 insertions, 0 deletions

diff --git a/src/lib/libcrypto/bn/exp.c b/src/lib/libcrypto/bn/exp.c
new file mode 100644
index 0000000000..4865b0ef74
--- /dev/null
+++ b/src/lib/libcrypto/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;
+                }
+
+        }