Limit scope of CN name constraints

[openssl.git] / test / bntest.c

diff --git a/test/bntest.c b/test/bntest.c
index d5b5e0494e2ff62a4d7957f839de4bbe55e78447..629707ad16915b7ac2a466ef3ecec29da3fc2f56 100644 (file)
--- a/test/bntest.c
+++ b/test/bntest.c
@@ -151,6 +151,78 @@ static int rand_neg(void)
 }
 
 
+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;
@@ -2118,6 +2190,7 @@ int setup_tests(void)
         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);