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Add unit tests for enabling/disabling rules
Add unit tests for enabling/disabling rules, covering: - matching names by substring - using "" to match all rules - matching names exactly - using ruleset ids in addition to ruleset names Signed-off-by: Mark Stemm <mark.stemm@gmail.com>
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| // SPDX-License-Identifier: Apache-2.0 | ||
| /* | ||
| Copyright (C) 2023 The Falco Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with 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. | ||
| */ | ||
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| #include <string> | ||
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| #include <gtest/gtest.h> | ||
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| #include <sinsp.h> | ||
| #include <filter_check_list.h> | ||
| #include <filter.h> | ||
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| #include <falco_engine.h> | ||
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| static std::string single_rule = R"END( | ||
| - rule: test rule | ||
| desc: A test rule | ||
| condition: evt.type=execve | ||
| output: A test rule matched (evt.type=%evt.type) | ||
| priority: INFO | ||
| source: syscall | ||
| tags: [process] | ||
| - rule: disabled rule | ||
| desc: A disabled rule | ||
| condition: evt.type=execve | ||
| output: A disabled rule matched (evt.type=%evt.type) | ||
| priority: INFO | ||
| source: syscall | ||
| enabled: false | ||
| tags: [exec process] | ||
| )END"; | ||
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| // This must be kept in line with the (private) falco_engine::s_default_ruleset | ||
| static const std::string default_ruleset = "falco-default-ruleset"; | ||
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| static const std::string ruleset_1 = "ruleset-1"; | ||
| static const std::string ruleset_2 = "ruleset-2"; | ||
| static const std::string ruleset_3 = "ruleset-3"; | ||
| static const std::string ruleset_4 = "ruleset-4"; | ||
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| static void load_rules(falco_engine& engine, sinsp& inspector, sinsp_filter_check_list& filterchecks) | ||
| { | ||
| std::unique_ptr<falco::load_result> res; | ||
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| auto filter_factory = std::shared_ptr<gen_event_filter_factory>( | ||
| new sinsp_filter_factory(&inspector, filterchecks)); | ||
| auto formatter_factory = std::shared_ptr<gen_event_formatter_factory>( | ||
| new sinsp_evt_formatter_factory(&inspector, filterchecks)); | ||
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| engine.add_source("syscall", filter_factory, formatter_factory); | ||
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| res = engine.load_rules(single_rule, "single_rule.yaml"); | ||
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| EXPECT_TRUE(res->successful()); | ||
| } | ||
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| TEST(EnableRule, enable_rule_name) | ||
| { | ||
| falco_engine engine; | ||
| sinsp inspector; | ||
| sinsp_filter_check_list filterchecks; | ||
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| load_rules(engine, inspector, filterchecks); | ||
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| // No rules should be enabled yet for any custom rulesets | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(default_ruleset)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
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| // Enable for first ruleset, only that ruleset should have an | ||
| // enabled rule afterward | ||
| engine.enable_rule("test", true, ruleset_1); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
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| // Enable for second ruleset | ||
| engine.enable_rule("test", true, ruleset_2); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
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| // When the substring is blank, all rules are enabled | ||
| // (including the disabled rule) | ||
| engine.enable_rule("", true, ruleset_3); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(2, engine.num_rules_for_ruleset(ruleset_3)); | ||
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| // Now disable for second ruleset | ||
| engine.enable_rule("test", false, ruleset_2); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(2, engine.num_rules_for_ruleset(ruleset_3)); | ||
| } | ||
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| TEST(EnableRule, enable_rule_tags) | ||
| { | ||
| falco_engine engine; | ||
| sinsp inspector; | ||
| sinsp_filter_check_list filterchecks; | ||
| std::set<std::string> process_tags = {"process"}; | ||
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| load_rules(engine, inspector, filterchecks); | ||
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| // No rules should be enabled yet for any custom rulesets | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(default_ruleset)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
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| // Enable for first ruleset, only that ruleset should have an | ||
| // enabled rule afterward | ||
| engine.enable_rule_by_tag(process_tags, true, ruleset_1); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
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| // Enable for second ruleset | ||
| engine.enable_rule_by_tag(process_tags, true, ruleset_2); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_2)); | ||
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| // Now disable for second ruleset | ||
| engine.enable_rule_by_tag(process_tags, false, ruleset_2); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| } | ||
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| TEST(EnableRule, enable_disabled_rule_by_tag) | ||
| { | ||
| falco_engine engine; | ||
| sinsp inspector; | ||
| sinsp_filter_check_list filterchecks; | ||
| std::set<std::string> exec_process_tags = {"exec process"}; | ||
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| load_rules(engine, inspector, filterchecks); | ||
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| // Only the first rule should be enabled | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(default_ruleset)); | ||
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| // Enable the disabled rule by tag | ||
| engine.enable_rule_by_tag(exec_process_tags, true); | ||
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| // Both rules should be enabled now | ||
| EXPECT_EQ(2, engine.num_rules_for_ruleset(default_ruleset)); | ||
| } | ||
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| TEST(EnableRule, enable_rule_id) | ||
| { | ||
| falco_engine engine; | ||
| sinsp inspector; | ||
| sinsp_filter_check_list filterchecks; | ||
| uint16_t ruleset_1_id; | ||
| uint16_t ruleset_2_id; | ||
| uint16_t ruleset_3_id; | ||
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| load_rules(engine, inspector, filterchecks); | ||
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| // The cases are identical to above, just using ruleset ids | ||
| // instead of names. | ||
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| ruleset_1_id = engine.find_ruleset_id(ruleset_1); | ||
| ruleset_2_id = engine.find_ruleset_id(ruleset_2); | ||
| ruleset_3_id = engine.find_ruleset_id(ruleset_3); | ||
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| EXPECT_EQ(1, engine.num_rules_for_ruleset(default_ruleset)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
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| engine.enable_rule("test rule", true, ruleset_1_id); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
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| engine.enable_rule("test rule", true, ruleset_2_id); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
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| engine.enable_rule("", true, ruleset_3_id); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(2, engine.num_rules_for_ruleset(ruleset_3)); | ||
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| engine.enable_rule("test", false, ruleset_2_id); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(2, engine.num_rules_for_ruleset(ruleset_3)); | ||
| } | ||
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| TEST(EnableRule, enable_rule_name_exact) | ||
| { | ||
| falco_engine engine; | ||
| sinsp inspector; | ||
| sinsp_filter_check_list filterchecks; | ||
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| load_rules(engine, inspector, filterchecks); | ||
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| EXPECT_EQ(1, engine.num_rules_for_ruleset(default_ruleset)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_4)); | ||
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| engine.enable_rule_exact("test rule", true, ruleset_1); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_4)); | ||
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| engine.enable_rule_exact("test rule", true, ruleset_2); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_4)); | ||
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| // This should **not** enable as this is a substring and not | ||
| // an exact match. | ||
| engine.enable_rule_exact("test", true, ruleset_3); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_4)); | ||
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| engine.enable_rule_exact("", true, ruleset_4); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
| EXPECT_EQ(2, engine.num_rules_for_ruleset(ruleset_4)); | ||
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| engine.enable_rule("test rule", false, ruleset_2); | ||
| EXPECT_EQ(1, engine.num_rules_for_ruleset(ruleset_1)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_2)); | ||
| EXPECT_EQ(0, engine.num_rules_for_ruleset(ruleset_3)); | ||
| EXPECT_EQ(2, engine.num_rules_for_ruleset(ruleset_4)); | ||
| } |