From 91f4c7f45f794fc7bee99356e56853369c98c410 Mon Sep 17 00:00:00 2001 From: moneromooo-monero Date: Thu, 31 Jan 2019 10:44:08 +0000 Subject: Make difficulty 128 bit instead of 64 bit Based on Boolberry work by: jahrsg cr.zoidberg --- tests/unit_tests/difficulty.cpp | 68 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 tests/unit_tests/difficulty.cpp (limited to 'tests/unit_tests/difficulty.cpp') diff --git a/tests/unit_tests/difficulty.cpp b/tests/unit_tests/difficulty.cpp new file mode 100644 index 000000000..090fecc84 --- /dev/null +++ b/tests/unit_tests/difficulty.cpp @@ -0,0 +1,68 @@ +// Copyright (c) 2019, 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 "cryptonote_basic/difficulty.h" + +static cryptonote::difficulty_type MKDIFF(uint64_t high, uint64_t low) +{ + cryptonote::difficulty_type d = high; + d = (d << 64) | low; + return d; +} + +static crypto::hash MKHASH(uint64_t high, uint64_t low) +{ + cryptonote::difficulty_type hash_target = high; + hash_target = (hash_target << 64) | low; + boost::multiprecision::uint256_t hash_value = std::numeric_limits::max() / hash_target; + crypto::hash h; + ((uint64_t*)&h)[0] = hash_value.convert_to(); + hash_value >>= 64; + ((uint64_t*)&h)[1] = hash_value.convert_to(); + hash_value >>= 64; + ((uint64_t*)&h)[2] = hash_value.convert_to(); + hash_value >>= 64; + ((uint64_t*)&h)[3] = hash_value.convert_to(); + return h; +} + +TEST(difficulty, check_hash) +{ + ASSERT_TRUE(cryptonote::check_hash(MKHASH(0, 1), MKDIFF(0, 1))); + ASSERT_FALSE(cryptonote::check_hash(MKHASH(0, 1), MKDIFF(0, 2))); + + ASSERT_TRUE(cryptonote::check_hash(MKHASH(0, 0xffffffffffffffff), MKDIFF(0, 0xffffffffffffffff))); + ASSERT_FALSE(cryptonote::check_hash(MKHASH(0, 0xffffffffffffffff), MKDIFF(1, 0))); + + ASSERT_TRUE(cryptonote::check_hash(MKHASH(1, 1), MKDIFF(1, 1))); + ASSERT_FALSE(cryptonote::check_hash(MKHASH(1, 1), MKDIFF(1, 2))); + + ASSERT_TRUE(cryptonote::check_hash(MKHASH(0xffffffffffffffff, 1), MKDIFF(0xffffffffffffffff, 1))); + ASSERT_FALSE(cryptonote::check_hash(MKHASH(0xffffffffffffffff, 1), MKDIFF(0xffffffffffffffff, 2))); +} -- cgit v1.2.3