/* Copyright 2017 - 2022 R. Thomas
 * Copyright 2017 - 2022 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_ATTRIBUTES_PKCS9_MESSAGE_DIGEST_H_
#define LIEF_PE_ATTRIBUTES_PKCS9_MESSAGE_DIGEST_H_

#include "LIEF/visibility.h"
#include "LIEF/errors.hpp"
#include "LIEF/PE/signature/Attribute.hpp"

namespace LIEF {
class VectorStream;
namespace PE {

class Parser;
class SignatureParser;

//! Interface over the structure described by the OID ``1.2.840.113549.1.9.4`` (PKCS #9)
//!
//! The internal structure is described in the
//! [RFC #2985: PKCS #9 - Selected Object Classes and Attribute Types Version 2.0](https://tools.ietf.org/html/rfc2985)
//!
//! ```text
//! messageDigest ATTRIBUTE ::= {
//!   WITH SYNTAX MessageDigest
//!   EQUALITY MATCHING RULE octetStringMatch
//!   SINGLE VALUE TRUE
//!   ID pkcs-9-at-messageDigest
//! }
//!
//! MessageDigest ::= OCTET STRING
//! ```
class LIEF_API PKCS9MessageDigest : public Attribute {

  friend class Parser;
  friend class SignatureParser;

  public:
  PKCS9MessageDigest();
  PKCS9MessageDigest(std::vector<uint8_t> digest);
  PKCS9MessageDigest(const PKCS9MessageDigest&);
  PKCS9MessageDigest& operator=(const PKCS9MessageDigest&);

  std::unique_ptr<Attribute> clone() const override;

  //! Message digeset as a blob of bytes as described in the RFC
  inline const std::vector<uint8_t>& digest() const {
    return digest_;
  }

  //! Print information about the attribute
  std::string print() const override;

  void accept(Visitor& visitor) const override;

  virtual ~PKCS9MessageDigest();

  private:
  std::vector<uint8_t> digest_;
};

}
}

#endif