add test for generic digest class

Change-Id: Ibe3f033ebec5f832eee7420013c7083ab224e65e
Reviewed-on: https://gerrit.libreoffice.org/36791Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

comphelper/CppunitTest_comphelper_test.mk

@@ -12,6 +12,7 @@ $(eval $(call gb_CppunitTest_CppunitTest,comphelper_test))
 $(eval $(call gb_CppunitTest_add_exception_objects,comphelper_test, \
     comphelper/qa/string/test_string \
     comphelper/qa/container/testifcontainer \
+    comphelper/qa/unit/test_hash \
 ))
 
 $(eval $(call gb_CppunitTest_use_sdk_api,comphelper_test))

comphelper/qa/unit/test_hash.cxx

+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <comphelper/hash.hxx>
+
+#include <sal/log.hxx>
+#include <iomanip>
+
+#include "cppunit/TestFixture.h"
+#include "cppunit/extensions/HelperMacros.h"
+
+class TestHash : public CppUnit::TestFixture
+{
+public:
+    void testSHA1();
+    void testSHA256();
+    void testSHA512();
+
+    CPPUNIT_TEST_SUITE(TestHash);
+    CPPUNIT_TEST(testSHA1);
+    CPPUNIT_TEST(testSHA256);
+    CPPUNIT_TEST(testSHA512);
+    CPPUNIT_TEST_SUITE_END();
+};
+
+namespace {
+
+std::string tostring(const std::vector<unsigned char>& a)
+{
+    std::stringstream aStrm;
+    for (auto& i:a)
+    {
+        aStrm << std::setw(2) << std::setfill('0') << std::hex << (int)i;
+    }
+
+    return aStrm.str();
+}
+
+}
+
+void TestHash::testSHA1()
+{
+    comphelper::Hash aHash(comphelper::HashType::SHA1);
+    const char* const pInput = "";
+    aHash.update(reinterpret_cast<const unsigned char*>(pInput), 0);
+    std::vector<unsigned char> calculate_hash = aHash.finalize();
+    CPPUNIT_ASSERT_EQUAL(size_t(20), calculate_hash.size());
+    CPPUNIT_ASSERT_EQUAL(std::string("da39a3ee5e6b4b0d3255bfef95601890afd80709"), tostring(calculate_hash));
+}
+
+void TestHash::testSHA256()
+{
+    comphelper::Hash aHash(comphelper::HashType::SHA256);
+    const char* const pInput = "";
+    aHash.update(reinterpret_cast<const unsigned char*>(pInput), 0);
+    std::vector<unsigned char> calculate_hash = aHash.finalize();
+    CPPUNIT_ASSERT_EQUAL(size_t(32), calculate_hash.size());
+    CPPUNIT_ASSERT_EQUAL(std::string("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"), tostring(calculate_hash));
+}
+
+void TestHash::testSHA512()
+{
+    comphelper::Hash aHash(comphelper::HashType::SHA512);
+    const char* const pInput = "";
+    aHash.update(reinterpret_cast<const unsigned char*>(pInput), 0);
+    std::vector<unsigned char> calculate_hash = aHash.finalize();
+    CPPUNIT_ASSERT_EQUAL(size_t(64), calculate_hash.size());
+    std::string aStr("cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e");
+    CPPUNIT_ASSERT_EQUAL(aStr, tostring(calculate_hash));
+}
+
+CPPUNIT_TEST_SUITE_REGISTRATION(TestHash);
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */