Added SHA256Compress to Bitcoin's SHA256 implementation.

src/test/sha256compress_tests.cpp

@@ -0,0 +1,35 @@
+#include "test/test_bitcoin.h"
+#include "crypto/sha256.h"
+#include "uint256.h"
+
+#include <stdexcept>
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_FIXTURE_TEST_SUITE(sha256compress_tests, BasicTestingSetup)
+
+BOOST_AUTO_TEST_CASE(compression)
+{
+	{
+		unsigned char preimage[64] = {};
+		CSHA256 hasher;
+		hasher.Write(&preimage[0], 64);
+
+		uint256 digest;
+
+		hasher.FinalizeNoPadding(digest.begin());
+
+		BOOST_CHECK_MESSAGE(digest == uint256S("d8a93718eaf9feba4362d2c091d4e58ccabe9f779957336269b4b917be9856da"),
+			                digest.GetHex());
+	}
+
+	{
+		unsigned char preimage[63] = {};
+		CSHA256 hasher;
+		hasher.Write(&preimage[0], 63);
+		uint256 digest;
+		BOOST_CHECK_THROW(hasher.FinalizeNoPadding(digest.begin()), std::length_error);
+	}
+}
+
+BOOST_AUTO_TEST_SUITE_END()