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// Copyright (c) 2017-2023, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "gtest/gtest.h"
#include <stdint.h>
#include "misc_log_ex.h"
#include "memwipe.h"
#include "warnings.h"
// Probably won't catch the optimized out case, but at least we test
// it works in the normal case
static void test(bool wipe)
{
char *foo = (char*)malloc(4);
ASSERT_TRUE(foo != NULL);
intptr_t foop = (intptr_t)foo;
strcpy(foo, "bar");
void *bar = wipe ? memwipe(foo, 3) : memset(foo, 0, 3);
ASSERT_EQ(foo, bar);
free(foo);
char *quux = (char*)malloc(4); // same size, just after free, so we're likely to get the same, depending on the allocator
PUSH_WARNINGS
DISABLE_GCC_WARNING(maybe-uninitialized)
if ((intptr_t)quux == foop)
{
MDEBUG(std::hex << std::setw(8) << std::setfill('0') << *(uint32_t*)quux);
if (wipe) { ASSERT_TRUE(memcmp(quux, "bar", 3)); }
}
else MWARNING("We did not get the same location, cannot check");
POP_WARNINGS
free(quux);
}
TEST(memwipe, control)
{
test(false);
}
TEST(memwipe, works)
{
test(true);
}
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