/*
- * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
}
+static int test_swap(void)
+{
+ BIGNUM *a = NULL, *b = NULL, *c = NULL, *d = NULL;
+ int top, cond, st = 0;
+
+ if (!TEST_ptr(a = BN_new())
+ || !TEST_ptr(b = BN_new())
+ || !TEST_ptr(c = BN_new())
+ || !TEST_ptr(d = BN_new()))
+ goto err;
+
+ BN_bntest_rand(a, 1024, 1, 0);
+ BN_bntest_rand(b, 1024, 1, 0);
+ BN_copy(c, a);
+ BN_copy(d, b);
+ top = BN_num_bits(a)/BN_BITS2;
+
+ /* regular swap */
+ BN_swap(a, b);
+ if (!equalBN("swap", a, d)
+ || !equalBN("swap", b, c))
+ goto err;
+
+ /* conditional swap: true */
+ cond = 1;
+ BN_consttime_swap(cond, a, b, top);
+ if (!equalBN("cswap true", a, c)
+ || !equalBN("cswap true", b, d))
+ goto err;
+
+ /* conditional swap: false */
+ cond = 0;
+ BN_consttime_swap(cond, a, b, top);
+ if (!equalBN("cswap false", a, c)
+ || !equalBN("cswap false", b, d))
+ goto err;
+
+ /* same tests but checking flag swap */
+ BN_set_flags(a, BN_FLG_CONSTTIME);
+
+ BN_swap(a, b);
+ if (!equalBN("swap, flags", a, d)
+ || !equalBN("swap, flags", b, c)
+ || !TEST_true(BN_get_flags(b, BN_FLG_CONSTTIME))
+ || !TEST_false(BN_get_flags(a, BN_FLG_CONSTTIME)))
+ goto err;
+
+ cond = 1;
+ BN_consttime_swap(cond, a, b, top);
+ if (!equalBN("cswap true, flags", a, c)
+ || !equalBN("cswap true, flags", b, d)
+ || !TEST_true(BN_get_flags(a, BN_FLG_CONSTTIME))
+ || !TEST_false(BN_get_flags(b, BN_FLG_CONSTTIME)))
+ goto err;
+
+ cond = 0;
+ BN_consttime_swap(cond, a, b, top);
+ if (!equalBN("cswap false, flags", a, c)
+ || !equalBN("cswap false, flags", b, d)
+ || !TEST_true(BN_get_flags(a, BN_FLG_CONSTTIME))
+ || !TEST_false(BN_get_flags(b, BN_FLG_CONSTTIME)))
+ goto err;
+
+ st = 1;
+ err:
+ BN_free(a);
+ BN_free(b);
+ BN_free(c);
+ BN_free(d);
+ return st;
+}
+
static int test_sub(void)
{
BIGNUM *a = NULL, *b = NULL, *c = NULL;
BN_free(b);
b = BN_dup(a);
BN_MONT_CTX_set(mont, n, ctx);
- BN_mod_mul_montgomery(c, a, a, mont, ctx);
- BN_mod_mul_montgomery(d, a, b, mont, ctx);
- if (!TEST_BN_eq(c, d))
+ if (!TEST_true(BN_mod_mul_montgomery(c, a, a, mont, ctx))
+ || !TEST_true(BN_mod_mul_montgomery(d, a, b, mont, ctx))
+ || !TEST_BN_eq(c, d))
+ goto err;
+
+ /* Regression test for bug in BN_from_montgomery_word */
+ BN_hex2bn(&a,
+ "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+ "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+ "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF");
+ BN_hex2bn(&n,
+ "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+ "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF");
+ BN_MONT_CTX_set(mont, n, ctx);
+ if (!TEST_false(BN_mod_mul_montgomery(d, a, a, mont, ctx)))
goto err;
/* Regression test for bug in rsaz_1024_mul_avx2 */
ADD_TEST(test_badmod);
ADD_TEST(test_expmodzero);
ADD_TEST(test_smallprime);
+ ADD_TEST(test_swap);
#ifndef OPENSSL_NO_EC2M
ADD_TEST(test_gf2m_add);
ADD_TEST(test_gf2m_mod);