1 //===--- ProperlySeededRandomGeneratorCheck.h - clang-tidy-------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CERT_PROPERLY_SEEDED_RANDOM_GENERATOR_H
10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CERT_PROPERLY_SEEDED_RANDOM_GENERATOR_H
11 
12 #include "../ClangTidyCheck.h"
13 #include <string>
14 
15 namespace clang {
16 namespace tidy {
17 namespace cert {
18 
19 /// Random number generator must be seeded properly.
20 ///
21 /// A random number generator initialized with default value or a
22 /// constant expression is a security vulnerability.
23 ///
24 /// For the user-facing documentation see:
25 /// http://clang.llvm.org/extra/clang-tidy/checks/cert-properly-seeded-random-generator.html
26 class ProperlySeededRandomGeneratorCheck : public ClangTidyCheck {
27 public:
28   ProperlySeededRandomGeneratorCheck(StringRef Name, ClangTidyContext *Context);
29   void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
30   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
31   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
32 
33 private:
34   template <class T>
35   void checkSeed(const ast_matchers::MatchFinder::MatchResult &Result,
36                  const T *Func);
37 
38   std::string RawDisallowedSeedTypes;
39   SmallVector<StringRef, 5> DisallowedSeedTypes;
40 };
41 
42 } // namespace cert
43 } // namespace tidy
44 } // namespace clang
45 
46 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CERT_PROPERLY_SEEDED_RANDOM_GENERATOR_H
47