ContentInfo.hpp

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/* Copyright 2017 - 2024 R. Thomas
 * Copyright 2017 - 2024 Quarkslab
 *
 * 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.
 */
#ifndef LIEF_PE_CONTENT_INFO_H
#define LIEF_PE_CONTENT_INFO_H
 
#include <vector>
#include <ostream>
#include <memory>
 
#include "LIEF/Object.hpp"
#include "LIEF/visibility.h"
 
#include "LIEF/PE/signature/types.hpp"
#include "LIEF/PE/enums.hpp"
 
namespace LIEF {
namespace PE {
 
class Parser;
class SignatureParser;
 
class LIEF_API ContentInfo : public Object {
  friend class Parser;
  friend class SignatureParser;
 
  public:
  class Content : public Object {
    public:
    Content(oid_t oid) :
      type_(std::move(oid))
    {}
 
    const oid_t& content_type() const {
      return type_;
    }
 
    virtual std::unique_ptr<Content> clone() const = 0;
    virtual void print(std::ostream& os) const = 0;
 
    LIEF_API friend std::ostream& operator<<(std::ostream& os, const Content& content) {
      content.print(os);
      return os;
    }
 
    template<class T>
    const T* cast() const {
      static_assert(std::is_base_of<Content, T>::value,
                    "Require ContentInfo inheritance");
      if (T::classof(this)) {
        return static_cast<const T*>(this);
      }
      return nullptr;
    }
 
    template<class T>
    T* cast() {
      return const_cast<T*>(static_cast<const Content*>(this)->cast<T>());
    }
 
    ~Content() override = default;
    private:
    oid_t type_;
  };
  ContentInfo();
  ContentInfo(const ContentInfo& other);
  ContentInfo(ContentInfo&& other) noexcept = default;
  ContentInfo& operator=(ContentInfo other);
 
  void swap(ContentInfo& other) noexcept;
  oid_t content_type() const {
    return value_->content_type();
  }
 
  Content& value() {
    return *value_;
  }
 
  const Content& value() const {
    return *value_;
  }
  std::vector<uint8_t> digest() const;
  ALGORITHMS digest_algorithm() const;
 
  void accept(Visitor& visitor) const override;
 
  ~ContentInfo() override = default;
 
  LIEF_API friend std::ostream& operator<<(std::ostream& os, const ContentInfo& content_info);
 
  private:
  std::unique_ptr<Content> value_;
};

}

}

#endif