unit_tests: add device unit tests

Annoyingly, its locking semantics are borked since it does not
do any locking

tests/unit_tests/CMakeLists.txt

@@ -41,6 +41,7 @@ set(unit_tests_sources
   command_line.cpp
   crypto.cpp
   decompose_amount_into_digits.cpp
+  device.cpp
   dns_resolver.cpp
   epee_boosted_tcp_server.cpp
   epee_levin_protocol_handler_async.cpp

tests/unit_tests/device.cpp

@@ -0,0 +1,131 @@
+// 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 "ringct/rctOps.h"
+#include "device/device_default.hpp"
+
+TEST(device, name)
+{
+  hw::core::device_default dev;
+  ASSERT_TRUE(dev.set_name("test"));
+  ASSERT_EQ(dev.get_name(), "test");
+}
+
+/*
+TEST(device, locking)
+{
+  hw::core::device_default dev;
+  ASSERT_TRUE(dev.try_lock());
+  ASSERT_FALSE(dev.try_lock());
+  dev.unlock();
+  ASSERT_TRUE(dev.try_lock());
+  dev.unlock();
+  dev.lock();
+  ASSERT_FALSE(dev.try_lock());
+  dev.unlock();
+  ASSERT_TRUE(dev.try_lock());
+  dev.unlock();
+}
+*/
+
+TEST(device, open_close)
+{
+  hw::core::device_default dev;
+  crypto::secret_key key;
+  ASSERT_TRUE(dev.open_tx(key));
+  ASSERT_TRUE(dev.close_tx());
+}
+
+TEST(device, ops)
+{
+  hw::core::device_default dev;
+  rct::key resd, res;
+  crypto::key_derivation derd, der;
+  rct::key sk, pk;
+  crypto::secret_key sk0, sk1;
+  crypto::public_key pk0, pk1;
+  crypto::ec_scalar ressc0, ressc1;
+  crypto::key_image ki0, ki1;
+
+  rct::skpkGen(sk, pk);
+  rct::scalarmultBase((rct::key&)pk0, (rct::key&)sk0);
+  rct::scalarmultBase((rct::key&)pk1, (rct::key&)sk1);
+
+  dev.scalarmultKey(resd, pk, sk);
+  rct::scalarmultKey(res, pk, sk);
+  ASSERT_EQ(resd, res);
+
+  dev.scalarmultBase(resd, sk);
+  rct::scalarmultBase(res, sk);
+  ASSERT_EQ(resd, res);
+
+  dev.sc_secret_add((crypto::secret_key&)resd, sk0, sk1);
+  sc_add((unsigned char*)&res, (unsigned char*)&sk0, (unsigned char*)&sk1);
+  ASSERT_EQ(resd, res);
+
+  dev.generate_key_derivation(pk0, sk0, derd);
+  crypto::generate_key_derivation(pk0, sk0, der);
+  ASSERT_FALSE(memcmp(&derd, &der, sizeof(der)));
+
+  dev.derivation_to_scalar(der, 0, ressc0);
+  crypto::derivation_to_scalar(der, 0, ressc1);
+  ASSERT_FALSE(memcmp(&ressc0, &ressc1, sizeof(ressc1)));
+
+  dev.derive_secret_key(der, 0, rct::rct2sk(sk), sk0);
+  crypto::derive_secret_key(der, 0, rct::rct2sk(sk), sk1);
+  ASSERT_EQ(sk0, sk1);
+
+  dev.derive_public_key(der, 0, rct::rct2pk(pk), pk0);
+  crypto::derive_public_key(der, 0, rct::rct2pk(pk), pk1);
+  ASSERT_EQ(pk0, pk1);
+
+  dev.secret_key_to_public_key(rct::rct2sk(sk), pk0);
+  crypto::secret_key_to_public_key(rct::rct2sk(sk), pk1);
+  ASSERT_EQ(pk0, pk1);
+
+  dev.generate_key_image(pk0, sk0, ki0);
+  crypto::generate_key_image(pk0, sk0, ki1);
+  ASSERT_EQ(ki0, ki1);
+}
+
+TEST(device, ecdh)
+{
+  hw::core::device_default dev;
+  rct::ecdhTuple tuple, tuple2;
+  rct::key key = rct::skGen();
+  tuple.mask = rct::skGen();
+  tuple.amount = rct::skGen();
+  tuple.senderPk = rct::pkGen();
+  tuple2 = tuple;
+  dev.ecdhEncode(tuple, key);
+  dev.ecdhDecode(tuple, key);
+  ASSERT_EQ(tuple2.mask, tuple.mask);
+  ASSERT_EQ(tuple2.amount, tuple.amount);
+  ASSERT_EQ(tuple2.senderPk, tuple.senderPk);
+}