X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fbn%2Fexptest.c;h=5fa02a1229e88c54d4f29c14eef2f166059b52da;hp=67dc95d72602d20e1a8dda0a3048a6b5b4110ef4;hb=2b0180c37fa6ffc48ee40caa831ca398b828e680;hpb=78414a6a897db42c9bcf06aa21c705811ab33921

diff --git a/crypto/bn/exptest.c b/crypto/bn/exptest.c
index 67dc95d726..5fa02a1229 100644
--- a/crypto/bn/exptest.c
+++ b/crypto/bn/exptest.c
@@ -59,30 +59,75 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include "bio.h"
-#include "bn.h"
-#include "rand.h"
-#include "err.h"
-#ifdef WINDOWS
-#include "../bio/bss_file.c"
-#endif
+
+#include "../e_os.h"
+
+#include <openssl/bio.h>
+#include <openssl/bn.h>
+#include <openssl/rand.h>
+#include <openssl/err.h>
 
 #define NUM_BITS	(BN_BITS*2)
 
-int main(argc,argv)
-int argc;
-char *argv[];
+static const char rnd_seed[] = "string to make the random number generator think it has entropy";
+
+/* test_exp_mod_zero tests that x**0 mod 1 == 0. It returns zero on success. */
+static int test_exp_mod_zero() {
+	BIGNUM a, p, m;
+	BIGNUM r;
+	BN_CTX *ctx = BN_CTX_new();
+	int ret = 1;
+
+	BN_init(&m);
+	BN_one(&m);
+
+	BN_init(&a);
+	BN_one(&a);
+
+	BN_init(&p);
+	BN_zero(&p);
+
+	BN_init(&r);
+	BN_mod_exp(&r, &a, &p, &m, ctx);
+	BN_CTX_free(ctx);
+
+	if (BN_is_zero(&r))
+		ret = 0;
+	else
+		{
+		printf("1**0 mod 1 = ");
+		BN_print_fp(stdout, &r);
+		printf(", should be 0\n");
+		}
+
+	BN_free(&r);
+	BN_free(&a);
+	BN_free(&p);
+	BN_free(&m);
+
+	return ret;
+}
+
+int main(int argc, char *argv[])
 	{
 	BN_CTX *ctx;
 	BIO *out=NULL;
 	int i,ret;
 	unsigned char c;
-	BIGNUM *r_mont,*r_recp,*a,*b,*m;
+	BIGNUM *r_mont,*r_mont_const,*r_recp,*r_simple,*a,*b,*m;
+
+	RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we don't
+	                                       * even check its return value
+	                                       * (which we should) */
+
+	ERR_load_BN_strings();
 
 	ctx=BN_CTX_new();
-	if (ctx == NULL) exit(1);
+	if (ctx == NULL) EXIT(1);
 	r_mont=BN_new();
+	r_mont_const=BN_new();
 	r_recp=BN_new();
+	r_simple=BN_new();
 	a=BN_new();
 	b=BN_new();
 	m=BN_new();
@@ -92,7 +137,7 @@ char *argv[];
 
 	out=BIO_new(BIO_s_file());
 
-	if (out == NULL) exit(1);
+	if (out == NULL) EXIT(1);
 	BIO_set_fp(out,stdout,BIO_NOCLOSE);
 
 	for (i=0; i<200; i++)
@@ -114,35 +159,89 @@ char *argv[];
 
 		ret=BN_mod_exp_mont(r_mont,a,b,m,ctx,NULL);
 		if (ret <= 0)
-			{ printf("BN_mod_exp_mont() problems\n"); exit(1); }
+			{
+			printf("BN_mod_exp_mont() problems\n");
+			ERR_print_errors(out);
+			EXIT(1);
+			}
 
 		ret=BN_mod_exp_recp(r_recp,a,b,m,ctx);
 		if (ret <= 0)
-			{ printf("BN_mod_exp_recp() problems\n"); exit(1); }
-		
-		if (BN_cmp(r_mont,r_recp) != 0)
 			{
-			printf("\nmont and recp results differ\n");
+			printf("BN_mod_exp_recp() problems\n");
+			ERR_print_errors(out);
+			EXIT(1);
+			}
+
+		ret=BN_mod_exp_simple(r_simple,a,b,m,ctx);
+		if (ret <= 0)
+			{
+			printf("BN_mod_exp_simple() problems\n");
+			ERR_print_errors(out);
+			EXIT(1);
+			}
+
+		ret=BN_mod_exp_mont_consttime(r_mont_const,a,b,m,ctx,NULL);
+		if (ret <= 0)
+			{
+			printf("BN_mod_exp_mont_consttime() problems\n");
+			ERR_print_errors(out);
+			EXIT(1);
+			}
+
+		if (BN_cmp(r_simple, r_mont) == 0
+		    && BN_cmp(r_simple,r_recp) == 0
+			&& BN_cmp(r_simple,r_mont_const) == 0)
+			{
+			printf(".");
+			fflush(stdout);
+			}
+		else
+		  	{
+			if (BN_cmp(r_simple,r_mont) != 0)
+				printf("\nsimple and mont results differ\n");
+			if (BN_cmp(r_simple,r_mont_const) != 0)
+				printf("\nsimple and mont const time results differ\n");
+			if (BN_cmp(r_simple,r_recp) != 0)
+				printf("\nsimple and recp results differ\n");
+
 			printf("a (%3d) = ",BN_num_bits(a));   BN_print(out,a);
 			printf("\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b);
 			printf("\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m);
+			printf("\nsimple   =");	BN_print(out,r_simple);
 			printf("\nrecp     =");	BN_print(out,r_recp);
 			printf("\nmont     ="); BN_print(out,r_mont);
+			printf("\nmont_ct  ="); BN_print(out,r_mont_const);
 			printf("\n");
-			exit(1);
-			}
-		else
-			{
-			printf(".");
-			fflush(stdout);
+			EXIT(1);
 			}
 		}
-	printf(" done\n");
-	exit(0);
+	BN_free(r_mont);
+	BN_free(r_mont_const);
+	BN_free(r_recp);
+	BN_free(r_simple);
+	BN_free(a);
+	BN_free(b);
+	BN_free(m);
+	BN_CTX_free(ctx);
+	ERR_remove_thread_state(NULL);
+	CRYPTO_mem_leaks(out);
+	BIO_free(out);
+	printf("\n");
+
+	if (test_exp_mod_zero() != 0)
+		goto err;
+
+	printf("done\n");
+
+	EXIT(0);
 err:
 	ERR_load_crypto_strings();
 	ERR_print_errors(out);
-	exit(1);
+#ifdef OPENSSL_SYS_NETWARE
+    printf("ERROR\n");
+#endif
+	EXIT(1);
 	return(1);
 	}