CryptoPPUtils.hpp

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#pragma once
#ifndef ENIGMA_CRYPTOPP_UTILS_H
#define ENIGMA_CRYPTOPP_UTILS_H
#include <Core/Core.hpp>
#include <cryptlib.h>
 
NS_ENIGMA_BEGIN
 
class CryptoPPUtils final {
    ENIGMA_STATIC_CLASS(CryptoPPUtils);
 
  public:
    /*
    *   Converts Crypto++ ErrorType into std::string
    */
    static const std::string GetErrorString(const enum CryptoPP::Exception::ErrorType error_type) noexcept {
#define CASE_RETURN(e)                    \
  case CryptoPP::Exception::ErrorType::e: \
    return #e
 
      switch (error_type) {
        CASE_RETURN(NOT_IMPLEMENTED);
        CASE_RETURN(INVALID_ARGUMENT);
        CASE_RETURN(CANNOT_FLUSH);
        CASE_RETURN(DATA_INTEGRITY_CHECK_FAILED);
        CASE_RETURN(INVALID_DATA_FORMAT);
        CASE_RETURN(IO_ERROR);
        default:
          CASE_RETURN(OTHER_ERROR);
      }
#undef CASE_RETURN
    }
 
    static const std::string GetErrorReason(const enum CryptoPP::Exception::ErrorType error_type) {
      using ErrorType = CryptoPP::Exception::ErrorType;
#define CASE_RETURN(c, ret) \
  case c:                   \
    return ret
 
      switch (error_type) {
        CASE_RETURN(ErrorType::INVALID_ARGUMENT, "An invalid argument was detected");
        CASE_RETURN(ErrorType::CANNOT_FLUSH, "BufferedTransformation received a Flush(true) signal but can't flush buffers");
        CASE_RETURN(ErrorType::DATA_INTEGRITY_CHECK_FAILED, "Data integerity check, such as CRC or MAC, failed");
        CASE_RETURN(ErrorType::INVALID_DATA_FORMAT, "Input data was received that did not conform to expected format");
        CASE_RETURN(ErrorType::IO_ERROR, "Error reading from input device or writing to output device");
        default:
          return "<unknown crypto++ error>";
      }
#undef CASE_RETURN
    }
 
    static const std::string GetFullErrorMessage(const CryptoPP::Exception& e) {
      std::ostringstream oss{};
      oss << "Error Type: " << GetErrorString(e.GetErrorType()) << '\n'
          << "Message: " << e.GetWhat() << '\n'
          << "Reason: " << GetErrorReason(e.GetErrorType());
      return oss.str();
    }
};
 
NS_ENIGMA_END
#endif // !ENIGMA_CRYPTOPP_UTILS_H