1 /* 2 * ModSecurity, http://www.modsecurity.org/ 3 * Copyright (c) 2015 - 2021 Trustwave Holdings, Inc. (http://www.trustwave.com/) 4 * 5 * You may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * If any of the files related to licensing are missing or if you have any 11 * other questions related to licensing please contact Trustwave Holdings, Inc. 12 * directly using the email address security@modsecurity.org. 13 * 14 */ 15 16 #ifndef SRC_OPERATORS_FUZZY_HASH_H_ 17 #define SRC_OPERATORS_FUZZY_HASH_H_ 18 19 #include <string> 20 #include <memory> 21 #include <utility> 22 23 #ifdef WITH_SSDEEP 24 #include <fuzzy.h> 25 #endif 26 27 #include "src/operators/operator.h" 28 29 namespace modsecurity { 30 namespace operators { 31 32 33 struct fuzzy_hash_chunk { 34 char *data; 35 struct fuzzy_hash_chunk *next; 36 }; 37 38 class FuzzyHash : public Operator { 39 public: 40 /** @ingroup ModSecurity_Operator */ FuzzyHash(std::unique_ptr<RunTimeString> param)41 explicit FuzzyHash(std::unique_ptr<RunTimeString> param) 42 : Operator("FuzzyHash", std::move(param)), 43 m_threshold(0), 44 m_head(NULL) { } 45 ~FuzzyHash(); 46 47 bool evaluate(Transaction *transaction, const std::string &std) override; 48 49 bool init(const std::string ¶m, std::string *error) override; 50 private: 51 int m_threshold; 52 struct fuzzy_hash_chunk *m_head; 53 }; 54 55 } // namespace operators 56 } // namespace modsecurity 57 58 59 #endif // SRC_OPERATORS_FUZZY_HASH_H_ 60