First release of open-appsec source code

components/generic_rulebase/evaluators/parameter_eval.cc

@@ -0,0 +1,38 @@
+// 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 "generic_rulebase/evaluators/parameter_eval.h"
+
+#include <vector>
+#include <string>
+
+#include "generic_rulebase/rulebase_config.h"
+#include "config.h"
+#include "debug.h"
+
+using namespace std;
+
+string ParameterMatcher::ctx_key = "parameters";
+
+ParameterMatcher::ParameterMatcher(const vector<string> &params)
+{
+    if (params.size() != 1) reportWrongNumberOfParams(ParameterMatcher::getName(), params.size(), 1, 1);
+    parameter_id = params[0];
+}
+
+Maybe<bool, Context::Error>
+ParameterMatcher::evalVariable() const
+{
+    auto rule = getConfiguration<BasicRuleConfig>("rulebase", "rulesConfig");
+    return rule.ok() && rule.unpack().isParameterActive(parameter_id);
+}