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_VALIDATE_UTF8_ENCODING_H_
17 #define SRC_OPERATORS_VALIDATE_UTF8_ENCODING_H_
18 
19 #include <string>
20 #include <memory>
21 
22 #include "src/operators/operator.h"
23 
24 
25 #define UNICODE_ERROR_CHARACTERS_MISSING    -1
26 #define UNICODE_ERROR_INVALID_ENCODING      -2
27 #define UNICODE_ERROR_OVERLONG_CHARACTER    -3
28 #define UNICODE_ERROR_RESTRICTED_CHARACTER  -4
29 #define UNICODE_ERROR_DECODING_ERROR        -5
30 
31 
32 namespace modsecurity {
33 namespace operators {
34 
35 class ValidateUtf8Encoding : public Operator {
36  public:
37     /** @ingroup ModSecurity_Operator */
ValidateUtf8Encoding()38     ValidateUtf8Encoding()
39         : Operator("ValidateUtf8Encoding") { }
40 
41     bool evaluate(Transaction *transaction, RuleWithActions *rule,
42         const std::string &str,
43         std::shared_ptr<RuleMessage> ruleMessage) override;
44 
45     static int detect_utf8_character(const unsigned char *p_read,
46         unsigned int length);
47 };
48 
49 }  // namespace operators
50 }  // namespace modsecurity
51 
52 
53 
54 #endif  // SRC_OPERATORS_VALIDATE_UTF8_ENCODING_H_
55