tests/CMakeLists.txt

@@ -26,6 +26,7 @@ target_link_libraries( ecc_test fc )
 add_executable( all_tests all_tests.cpp
                           compress/compress.cpp
                           crypto/aes_test.cpp
+                          crypto/array_initialization_test.cpp
                           crypto/base_n_tests.cpp
                           crypto/bigint_test.cpp
                           crypto/blind.cpp

tests/crypto/array_initialization_test.cpp

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2019 BitShares Blockchain Foundation, and contributors.
+ *
+ * The MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include <boost/test/unit_test.hpp>
+
+#include <fc/crypto/elliptic.hpp>
+#include <fc/crypto/rand.hpp>
+
+#include <string.h>
+
+static void check_null_key()
+{
+   fc::ecc::public_key_data key1;
+   fc::ecc::public_key_data key2;
+   unsigned char zeroes[33];
+   static_assert( key1.size() == sizeof(zeroes), "Wrong array size!" );
+   memset( zeroes, 0, sizeof(zeroes) );
+   BOOST_CHECK( !memcmp( key1.data(), zeroes, sizeof(zeroes) ) );
+   BOOST_CHECK( !memcmp( key2.data(), zeroes, sizeof(zeroes) ) );
+
+   // now "pollute" the keys for the next invocation
+   key1 = fc::ecc::private_key::generate().get_public_key();
+   for( unsigned char c = 0; c < key2.size(); c++ )
+   {
+      key2[c] = c ^ 17;
+      zeroes[c] = c ^ 47;
+   }
+
+   // ...and use them to prevent the compiler from optimizing the pollution away.
+   wlog( "Key1: ${k}", ("k",fc::ecc::public_key::to_base58(key1)) );
+   wlog( "Key2: ${k}", ("k",fc::ecc::public_key::to_base58(key2)) );
+}
+
+BOOST_AUTO_TEST_SUITE(fc_crypto)
+
+BOOST_AUTO_TEST_CASE(array_init_test)
+{
+   check_null_key();
+   check_null_key();
+   {
+      char junk[128];
+      fc::rand_bytes( junk, sizeof(junk) );
+   }
+   check_null_key();
+}
+
+BOOST_AUTO_TEST_SUITE_END()