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Merge pull request #4097

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61caab8 crypto: remove slight bias in key generation due to modulo (moneromooo-monero)
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luigi1111 2018-07-27 14:23:54 -05:00
commit 3fde902394
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5 changed files with 77 additions and 10 deletions
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1
tests/unit_tests/CMakeLists.txt
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@ -56,6 +56,7 @@ set(unit_tests_sources
mul_div.cpp
multisig.cpp
parse_amount.cpp
random.cpp
serialization.cpp
sha256.cpp
slow_memmem.cpp

47
tests/unit_tests/random.cpp Normal file
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@ -0,0 +1,47 @@
// Copyright (c) 2018, 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 "crypto/crypto.h"
extern "C" {
#include "crypto/crypto-ops.h"
}
TEST(random32_unbiased, less_than_order)
{
unsigned char tmp[32], tmp2[32];
for (int i = 0; i < 1000; ++i)
{
crypto::random32_unbiased(tmp);
memcpy(tmp2, tmp, 32);
sc_reduce32(tmp2);
ASSERT_EQ(memcmp(tmp, tmp2, 32), 0);
}
}