First release of open-appsec source code

components/security_apps/waap/waap_clib/WaapSampleValue.cc

@@ -0,0 +1,41 @@
+// Copyright (C) 2022 Check Point Software Technologies Ltd. All rights reserved.
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "WaapSampleValue.h"
+
+SampleValue::SampleValue(const std::string &sample,
+    const std::shared_ptr<Waap::RegexPreconditions> &regexPreconditions)
+    :
+        m_sample(sample),
+        m_regexPreconditions(regexPreconditions),
+        m_pmWordSet()
+{
+    if (m_regexPreconditions) {
+        // Run aho-corasick and related rules once the sample value is known.
+        // The result pmWordSet is reused later for multiple calls to findMatches on the same sample.
+        regexPreconditions->pmScan(
+            Buffer(m_sample.data(), m_sample.size(), Buffer::MemoryType::STATIC), m_pmWordSet);
+    }
+}
+
+const std::string &
+SampleValue::getSampleString() const
+{
+    return m_sample;
+}
+
+void
+SampleValue::findMatches(const Regex &pattern, std::vector<RegexMatch> &matches) const
+{
+    pattern.findAllMatches(m_sample, matches, m_regexPreconditions ? &m_pmWordSet : nullptr);
+}