First release of open-appsec source code

components/security_apps/waap/waap_clib/PatternMatcher.cc

@@ -0,0 +1,53 @@
+// 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.
+
+// #define WAF2_LOGGING_ENABLE
+#include "PatternMatcher.h"
+#include "Waf2Regex.h"
+#include <string>
+#include <boost/algorithm/string.hpp>
+#include <fnmatch.h>
+#include "debug.h"
+
+USE_DEBUG_FLAG(D_WAAP);
+
+// PatternMatcherWildcard implementation
+PatternMatcherWildcard::PatternMatcherWildcard(const std::string &pattern)
+:m_pattern(pattern) {
+    dbgTrace(D_WAAP) << "Compiled pattern: '" << m_pattern.c_str() << "'\n";
+}
+
+bool PatternMatcherWildcard::match(const std::string &value) const {
+    // Use unix filename (glob) string pattern matcher.
+    // The Unix fnmatch() function only returns 0 in case of a succesful match.
+    // In case no-match it returns FNM_NOMATCH constant.
+    // In case of error it returns other non-zero return values.
+    // However, in our usage here error is considered a "no-match".
+    return ::fnmatch(m_pattern.c_str(), value.c_str(), 0) == 0;
+}
+
+// PatternMatcherRegex implementation
+PatternMatcherRegex::PatternMatcherRegex(const std::string &pattern)
+:m_pattern(pattern), m_regexError(false), m_regex(pattern, m_regexError, "patternMatcherRegex_" + pattern) {
+    if (m_regexError) {
+        dbgWarning(D_WAAP) << "Failed compiling regex pattern: '" << m_pattern.c_str() << "'\n";
+    }
+}
+
+bool PatternMatcherRegex::match(const std::string &value) const {
+    if (m_regexError) {
+        return false;
+    }
+
+    return m_regex.hasMatch(value);
+}