test/exptest.c - third_party/openssl - Git at Google

 /*
  * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 #include "internal/nelem.h"

 #include <openssl/bio.h>
 #include <openssl/bn.h>
 #include <openssl/rand.h>
 #include <openssl/err.h>

 #include "testutil.h"

 #define NUM_BITS        (BN_BITS2 * 4)

 #define BN_print_var(v) test_output_bignum(#v, v)

 /*
  * Test that r == 0 in test_exp_mod_zero(). Returns one on success,
  * returns zero and prints debug output otherwise.
  */
 static int a_is_zero_mod_one(const char *method, const BIGNUM *r,
                              const BIGNUM *a)
 {
     if (!BN_is_zero(r)) {
         TEST_error("%s failed: a ** 0 mod 1 = r (should be 0)", method);
         BN_print_var(a);
         BN_print_var(r);
         return 0;
     }
     return 1;
 }

 /*
  * test_mod_exp_zero tests that x**0 mod 1 == 0. It returns zero on success.
  */
 static int test_mod_exp_zero(void)
 {
     BIGNUM *a = NULL, *p = NULL, *m = NULL;
     BIGNUM *r = NULL;
     BN_ULONG one_word = 1;
     BN_CTX *ctx = BN_CTX_new();
     int ret = 1, failed = 0;

     if (!TEST_ptr(m = BN_new())
         || !TEST_ptr(a = BN_new())
         || !TEST_ptr(p = BN_new())
         || !TEST_ptr(r = BN_new()))
         goto err;

     BN_one(m);
     BN_one(a);
     BN_zero(p);

     if (!TEST_true(BN_rand(a, 1024, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY)))
         goto err;

     if (!TEST_true(BN_mod_exp(r, a, p, m, ctx)))
         goto err;

     if (!TEST_true(a_is_zero_mod_one("BN_mod_exp", r, a)))
         failed = 1;

     if (!TEST_true(BN_mod_exp_recp(r, a, p, m, ctx)))
         goto err;

     if (!TEST_true(a_is_zero_mod_one("BN_mod_exp_recp", r, a)))
         failed = 1;

     if (!TEST_true(BN_mod_exp_simple(r, a, p, m, ctx)))
         goto err;

     if (!TEST_true(a_is_zero_mod_one("BN_mod_exp_simple", r, a)))
         failed = 1;

     if (!TEST_true(BN_mod_exp_mont(r, a, p, m, ctx, NULL)))
         goto err;

     if (!TEST_true(a_is_zero_mod_one("BN_mod_exp_mont", r, a)))
         failed = 1;

     if (!TEST_true(BN_mod_exp_mont_consttime(r, a, p, m, ctx, NULL)))
         goto err;

     if (!TEST_true(a_is_zero_mod_one("BN_mod_exp_mont_consttime", r, a)))
         failed = 1;

     /*
      * A different codepath exists for single word multiplication
      * in non-constant-time only.
      */
     if (!TEST_true(BN_mod_exp_mont_word(r, one_word, p, m, ctx, NULL)))
         goto err;

     if (!TEST_BN_eq_zero(r)) {
         TEST_error("BN_mod_exp_mont_word failed: "
                    "1 ** 0 mod 1 = r (should be 0)");
         BN_print_var(r);
         goto err;
     }

     ret = !failed;
  err:
     BN_free(r);
     BN_free(a);
     BN_free(p);
     BN_free(m);
     BN_CTX_free(ctx);

     return ret;
 }

 static int test_mod_exp(int round)
 {
     BN_CTX *ctx;
     unsigned char c;
     int ret = 0;
     BIGNUM *r_mont = NULL;
     BIGNUM *r_mont_const = NULL;
     BIGNUM *r_recp = NULL;
     BIGNUM *r_simple = NULL;
     BIGNUM *a = NULL;
     BIGNUM *b = NULL;
     BIGNUM *m = NULL;

     if (!TEST_ptr(ctx = BN_CTX_new()))
         goto err;

     if (!TEST_ptr(r_mont = BN_new())
         || !TEST_ptr(r_mont_const = BN_new())
         || !TEST_ptr(r_recp = BN_new())
         || !TEST_ptr(r_simple = BN_new())
         || !TEST_ptr(a = BN_new())
         || !TEST_ptr(b = BN_new())
         || !TEST_ptr(m = BN_new()))
         goto err;

     if (!TEST_true(RAND_bytes(&c, 1)))
         goto err;
     c = (c % BN_BITS) - BN_BITS2;
     if (!TEST_true(BN_rand(a, NUM_BITS + c, BN_RAND_TOP_ONE,
                            BN_RAND_BOTTOM_ANY)))
         goto err;

     if (!TEST_true(RAND_bytes(&c, 1)))
         goto err;
     c = (c % BN_BITS) - BN_BITS2;
     if (!TEST_true(BN_rand(b, NUM_BITS + c, BN_RAND_TOP_ONE,
                            BN_RAND_BOTTOM_ANY)))
         goto err;

     if (!TEST_true(RAND_bytes(&c, 1)))
         goto err;
     c = (c % BN_BITS) - BN_BITS2;
     if (!TEST_true(BN_rand(m, NUM_BITS + c, BN_RAND_TOP_ONE,
                            BN_RAND_BOTTOM_ODD)))
         goto err;

     if (!TEST_true(BN_mod(a, a, m, ctx))
         || !TEST_true(BN_mod(b, b, m, ctx))
         || !TEST_true(BN_mod_exp_mont(r_mont, a, b, m, ctx, NULL))
         || !TEST_true(BN_mod_exp_recp(r_recp, a, b, m, ctx))
         || !TEST_true(BN_mod_exp_simple(r_simple, a, b, m, ctx))
         || !TEST_true(BN_mod_exp_mont_consttime(r_mont_const, a, b, m, ctx, NULL)))
         goto err;

     if (!TEST_BN_eq(r_simple, r_mont)
         || !TEST_BN_eq(r_simple, r_recp)
         || !TEST_BN_eq(r_simple, r_mont_const)) {
         if (BN_cmp(r_simple, r_mont) != 0)
             TEST_info("simple and mont results differ");
         if (BN_cmp(r_simple, r_mont_const) != 0)
             TEST_info("simple and mont const time results differ");
         if (BN_cmp(r_simple, r_recp) != 0)
             TEST_info("simple and recp results differ");

         BN_print_var(a);
         BN_print_var(b);
         BN_print_var(m);
         BN_print_var(r_simple);
         BN_print_var(r_recp);
         BN_print_var(r_mont);
         BN_print_var(r_mont_const);
         goto err;
     }

     ret = 1;
  err:
     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);

     return ret;
 }

 static int test_mod_exp_x2(int idx)
 {
     BN_CTX *ctx;
     int ret = 0;
     BIGNUM *r_mont_const_x2_1 = NULL;
     BIGNUM *r_mont_const_x2_2 = NULL;
     BIGNUM *r_simple1 = NULL;
     BIGNUM *r_simple2 = NULL;
     BIGNUM *a1 = NULL;
     BIGNUM *b1 = NULL;
     BIGNUM *m1 = NULL;
     BIGNUM *a2 = NULL;
     BIGNUM *b2 = NULL;
     BIGNUM *m2 = NULL;
     int factor_size = 0;

     if (idx <= 100)
         factor_size = 1024;
     else if (idx <= 200)
         factor_size = 1536;
     else if (idx <= 300)
         factor_size = 2048;

     if (!TEST_ptr(ctx = BN_CTX_new()))
         goto err;

     if (!TEST_ptr(r_mont_const_x2_1 = BN_new())
         || !TEST_ptr(r_mont_const_x2_2 = BN_new())
         || !TEST_ptr(r_simple1 = BN_new())
         || !TEST_ptr(r_simple2 = BN_new())
         || !TEST_ptr(a1 = BN_new())
         || !TEST_ptr(b1 = BN_new())
         || !TEST_ptr(m1 = BN_new())
         || !TEST_ptr(a2 = BN_new())
         || !TEST_ptr(b2 = BN_new())
         || !TEST_ptr(m2 = BN_new()))
         goto err;

     BN_rand(a1, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY);
     BN_rand(b1, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY);
     BN_rand(m1, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ODD);
     BN_rand(a2, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY);
     BN_rand(b2, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY);
     BN_rand(m2, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ODD);

     if (!TEST_true(BN_mod(a1, a1, m1, ctx))
         || !TEST_true(BN_mod(b1, b1, m1, ctx))
         || !TEST_true(BN_mod(a2, a2, m2, ctx))
         || !TEST_true(BN_mod(b2, b2, m2, ctx))
         || !TEST_true(BN_mod_exp_simple(r_simple1, a1, b1, m1, ctx))
         || !TEST_true(BN_mod_exp_simple(r_simple2, a2, b2, m2, ctx))
         || !TEST_true(BN_mod_exp_mont_consttime_x2(r_mont_const_x2_1, a1, b1, m1, NULL,
                                                    r_mont_const_x2_2, a2, b2, m2, NULL,
                                                    ctx)))
         goto err;

     if (!TEST_BN_eq(r_simple1, r_mont_const_x2_1)
         || !TEST_BN_eq(r_simple2, r_mont_const_x2_2)) {
         if (BN_cmp(r_simple1, r_mont_const_x2_1) != 0)
             TEST_info("simple and mont const time x2 (#1) results differ");
         if (BN_cmp(r_simple2, r_mont_const_x2_2) != 0)
             TEST_info("simple and mont const time x2 (#2) results differ");

         BN_print_var(a1);
         BN_print_var(b1);
         BN_print_var(m1);
         BN_print_var(a2);
         BN_print_var(b2);
         BN_print_var(m2);
         BN_print_var(r_simple1);
         BN_print_var(r_simple2);
         BN_print_var(r_mont_const_x2_1);
         BN_print_var(r_mont_const_x2_2);
         goto err;
     }

     ret = 1;
  err:
     BN_free(r_mont_const_x2_1);
     BN_free(r_mont_const_x2_2);
     BN_free(r_simple1);
     BN_free(r_simple2);
     BN_free(a1);
     BN_free(b1);
     BN_free(m1);
     BN_free(a2);
     BN_free(b2);
     BN_free(m2);
     BN_CTX_free(ctx);

     return ret;
 }

 int setup_tests(void)
 {
     ADD_TEST(test_mod_exp_zero);
     ADD_ALL_TESTS(test_mod_exp, 200);
     ADD_ALL_TESTS(test_mod_exp_x2, 300);
     return 1;
 }
	/*
	* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the Apache License 2.0 (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	#include "internal/nelem.h"

	#include <openssl/bio.h>
	#include <openssl/bn.h>
	#include <openssl/rand.h>
	#include <openssl/err.h>

	#include "testutil.h"

	#define NUM_BITS (BN_BITS2 * 4)

	#define BN_print_var(v) test_output_bignum(#v, v)

	/*
	* Test that r == 0 in test_exp_mod_zero(). Returns one on success,
	* returns zero and prints debug output otherwise.
	*/
	static int a_is_zero_mod_one(const char method, const BIGNUM r,
	const BIGNUM *a)
	{
	if (!BN_is_zero(r)) {
	TEST_error("%s failed: a ** 0 mod 1 = r (should be 0)", method);
	BN_print_var(a);
	BN_print_var(r);
	return 0;
	}
	return 1;
	}

	/*
	* test_mod_exp_zero tests that x**0 mod 1 == 0. It returns zero on success.
	*/
	static int test_mod_exp_zero(void)
	{
	BIGNUM a = NULL, p = NULL, *m = NULL;
	BIGNUM *r = NULL;
	BN_ULONG one_word = 1;
	BN_CTX *ctx = BN_CTX_new();
	int ret = 1, failed = 0;

	if (!TEST_ptr(m = BN_new())
	\|\| !TEST_ptr(a = BN_new())
	\|\| !TEST_ptr(p = BN_new())
	\|\| !TEST_ptr(r = BN_new()))
	goto err;

	BN_one(m);
	BN_one(a);
	BN_zero(p);

	if (!TEST_true(BN_rand(a, 1024, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY)))
	goto err;

	if (!TEST_true(BN_mod_exp(r, a, p, m, ctx)))
	goto err;

	if (!TEST_true(a_is_zero_mod_one("BN_mod_exp", r, a)))
	failed = 1;

	if (!TEST_true(BN_mod_exp_recp(r, a, p, m, ctx)))
	goto err;

	if (!TEST_true(a_is_zero_mod_one("BN_mod_exp_recp", r, a)))
	failed = 1;

	if (!TEST_true(BN_mod_exp_simple(r, a, p, m, ctx)))
	goto err;

	if (!TEST_true(a_is_zero_mod_one("BN_mod_exp_simple", r, a)))
	failed = 1;

	if (!TEST_true(BN_mod_exp_mont(r, a, p, m, ctx, NULL)))
	goto err;

	if (!TEST_true(a_is_zero_mod_one("BN_mod_exp_mont", r, a)))
	failed = 1;

	if (!TEST_true(BN_mod_exp_mont_consttime(r, a, p, m, ctx, NULL)))
	goto err;

	if (!TEST_true(a_is_zero_mod_one("BN_mod_exp_mont_consttime", r, a)))
	failed = 1;

	/*
	* A different codepath exists for single word multiplication
	* in non-constant-time only.
	*/
	if (!TEST_true(BN_mod_exp_mont_word(r, one_word, p, m, ctx, NULL)))
	goto err;

	if (!TEST_BN_eq_zero(r)) {
	TEST_error("BN_mod_exp_mont_word failed: "
	"1 ** 0 mod 1 = r (should be 0)");
	BN_print_var(r);
	goto err;
	}

	ret = !failed;
	err:
	BN_free(r);
	BN_free(a);
	BN_free(p);
	BN_free(m);
	BN_CTX_free(ctx);

	return ret;
	}

	static int test_mod_exp(int round)
	{
	BN_CTX *ctx;
	unsigned char c;
	int ret = 0;
	BIGNUM *r_mont = NULL;
	BIGNUM *r_mont_const = NULL;
	BIGNUM *r_recp = NULL;
	BIGNUM *r_simple = NULL;
	BIGNUM *a = NULL;
	BIGNUM *b = NULL;
	BIGNUM *m = NULL;

	if (!TEST_ptr(ctx = BN_CTX_new()))
	goto err;

	if (!TEST_ptr(r_mont = BN_new())
	\|\| !TEST_ptr(r_mont_const = BN_new())
	\|\| !TEST_ptr(r_recp = BN_new())
	\|\| !TEST_ptr(r_simple = BN_new())
	\|\| !TEST_ptr(a = BN_new())
	\|\| !TEST_ptr(b = BN_new())
	\|\| !TEST_ptr(m = BN_new()))
	goto err;

	if (!TEST_true(RAND_bytes(&c, 1)))
	goto err;
	c = (c % BN_BITS) - BN_BITS2;
	if (!TEST_true(BN_rand(a, NUM_BITS + c, BN_RAND_TOP_ONE,
	BN_RAND_BOTTOM_ANY)))
	goto err;

	if (!TEST_true(RAND_bytes(&c, 1)))
	goto err;
	c = (c % BN_BITS) - BN_BITS2;
	if (!TEST_true(BN_rand(b, NUM_BITS + c, BN_RAND_TOP_ONE,
	BN_RAND_BOTTOM_ANY)))
	goto err;

	if (!TEST_true(RAND_bytes(&c, 1)))
	goto err;
	c = (c % BN_BITS) - BN_BITS2;
	if (!TEST_true(BN_rand(m, NUM_BITS + c, BN_RAND_TOP_ONE,
	BN_RAND_BOTTOM_ODD)))
	goto err;

	if (!TEST_true(BN_mod(a, a, m, ctx))
	\|\| !TEST_true(BN_mod(b, b, m, ctx))
	\|\| !TEST_true(BN_mod_exp_mont(r_mont, a, b, m, ctx, NULL))
	\|\| !TEST_true(BN_mod_exp_recp(r_recp, a, b, m, ctx))
	\|\| !TEST_true(BN_mod_exp_simple(r_simple, a, b, m, ctx))
	\|\| !TEST_true(BN_mod_exp_mont_consttime(r_mont_const, a, b, m, ctx, NULL)))
	goto err;

	if (!TEST_BN_eq(r_simple, r_mont)
	\|\| !TEST_BN_eq(r_simple, r_recp)
	\|\| !TEST_BN_eq(r_simple, r_mont_const)) {
	if (BN_cmp(r_simple, r_mont) != 0)
	TEST_info("simple and mont results differ");
	if (BN_cmp(r_simple, r_mont_const) != 0)
	TEST_info("simple and mont const time results differ");
	if (BN_cmp(r_simple, r_recp) != 0)
	TEST_info("simple and recp results differ");

	BN_print_var(a);
	BN_print_var(b);
	BN_print_var(m);
	BN_print_var(r_simple);
	BN_print_var(r_recp);
	BN_print_var(r_mont);
	BN_print_var(r_mont_const);
	goto err;
	}

	ret = 1;
	err:
	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);

	return ret;
	}

	static int test_mod_exp_x2(int idx)
	{
	BN_CTX *ctx;
	int ret = 0;
	BIGNUM *r_mont_const_x2_1 = NULL;
	BIGNUM *r_mont_const_x2_2 = NULL;
	BIGNUM *r_simple1 = NULL;
	BIGNUM *r_simple2 = NULL;
	BIGNUM *a1 = NULL;
	BIGNUM *b1 = NULL;
	BIGNUM *m1 = NULL;
	BIGNUM *a2 = NULL;
	BIGNUM *b2 = NULL;
	BIGNUM *m2 = NULL;
	int factor_size = 0;

	if (idx <= 100)
	factor_size = 1024;
	else if (idx <= 200)
	factor_size = 1536;
	else if (idx <= 300)
	factor_size = 2048;

	if (!TEST_ptr(ctx = BN_CTX_new()))
	goto err;

	if (!TEST_ptr(r_mont_const_x2_1 = BN_new())
	\|\| !TEST_ptr(r_mont_const_x2_2 = BN_new())
	\|\| !TEST_ptr(r_simple1 = BN_new())
	\|\| !TEST_ptr(r_simple2 = BN_new())
	\|\| !TEST_ptr(a1 = BN_new())
	\|\| !TEST_ptr(b1 = BN_new())
	\|\| !TEST_ptr(m1 = BN_new())
	\|\| !TEST_ptr(a2 = BN_new())
	\|\| !TEST_ptr(b2 = BN_new())
	\|\| !TEST_ptr(m2 = BN_new()))
	goto err;

	BN_rand(a1, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY);
	BN_rand(b1, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY);
	BN_rand(m1, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ODD);
	BN_rand(a2, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY);
	BN_rand(b2, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY);
	BN_rand(m2, factor_size, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ODD);

	if (!TEST_true(BN_mod(a1, a1, m1, ctx))
	\|\| !TEST_true(BN_mod(b1, b1, m1, ctx))
	\|\| !TEST_true(BN_mod(a2, a2, m2, ctx))
	\|\| !TEST_true(BN_mod(b2, b2, m2, ctx))
	\|\| !TEST_true(BN_mod_exp_simple(r_simple1, a1, b1, m1, ctx))
	\|\| !TEST_true(BN_mod_exp_simple(r_simple2, a2, b2, m2, ctx))
	\|\| !TEST_true(BN_mod_exp_mont_consttime_x2(r_mont_const_x2_1, a1, b1, m1, NULL,
	r_mont_const_x2_2, a2, b2, m2, NULL,
	ctx)))
	goto err;

	if (!TEST_BN_eq(r_simple1, r_mont_const_x2_1)
	\|\| !TEST_BN_eq(r_simple2, r_mont_const_x2_2)) {
	if (BN_cmp(r_simple1, r_mont_const_x2_1) != 0)
	TEST_info("simple and mont const time x2 (#1) results differ");
	if (BN_cmp(r_simple2, r_mont_const_x2_2) != 0)
	TEST_info("simple and mont const time x2 (#2) results differ");

	BN_print_var(a1);
	BN_print_var(b1);
	BN_print_var(m1);
	BN_print_var(a2);
	BN_print_var(b2);
	BN_print_var(m2);
	BN_print_var(r_simple1);
	BN_print_var(r_simple2);
	BN_print_var(r_mont_const_x2_1);
	BN_print_var(r_mont_const_x2_2);
	goto err;
	}

	ret = 1;
	err:
	BN_free(r_mont_const_x2_1);
	BN_free(r_mont_const_x2_2);
	BN_free(r_simple1);
	BN_free(r_simple2);
	BN_free(a1);
	BN_free(b1);
	BN_free(m1);
	BN_free(a2);
	BN_free(b2);
	BN_free(m2);
	BN_CTX_free(ctx);

	return ret;
	}

	int setup_tests(void)
	{
	ADD_TEST(test_mod_exp_zero);
	ADD_ALL_TESTS(test_mod_exp, 200);
	ADD_ALL_TESTS(test_mod_exp_x2, 300);
	return 1;
	}