clang-tidy/cert/ProperlySeededRandomGeneratorCheck.h

0001 //===--- ProperlySeededRandomGeneratorCheck.h - clang-tidy-------*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CERT_PROPERLY_SEEDED_RANDOM_GENERATOR_H
0010 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CERT_PROPERLY_SEEDED_RANDOM_GENERATOR_H
0011
0012 #include "../ClangTidyCheck.h"
0013 #include <string>
0014
0015 namespace clang::tidy::cert {
0016
0017 /// Random number generator must be seeded properly.
0018 ///
0019 /// A random number generator initialized with default value or a
0020 /// constant expression is a security vulnerability.
0021 ///
0022 /// For the user-facing documentation see:
0023 /// http://clang.llvm.org/extra/clang-tidy/checks/cert/msc51-cpp.html
0024 class ProperlySeededRandomGeneratorCheck : public ClangTidyCheck {
0025 public:
0026   ProperlySeededRandomGeneratorCheck(StringRef Name, ClangTidyContext *Context);
0027   void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
0028   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
0029   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
0030
0031 private:
0032   template <class T>
0033   void checkSeed(const ast_matchers::MatchFinder::MatchResult &Result,
0034                  const T *Func);
0035
0036   std::string RawDisallowedSeedTypes;
0037   SmallVector<StringRef, 5> DisallowedSeedTypes;
0038 };
0039
0040 } // namespace clang::tidy::cert
0041
0042 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CERT_PROPERLY_SEEDED_RANDOM_GENERATOR_H