GCrypt/GCryptLib/src/GhettoCryptWrapper.cpp

#include "GhettoCryptWrapper.h"
#include "Cipher.h"
#include "Util.h"

namespace Leonetienne::GCrypt {

  std::string GhettoCryptWrapper::EncryptString(const std::string& cleartext, const std::string& password) {
    // Instanciate our cipher and supply a key
    const Block key = PasswordToKey(password);
    Cipher cipher(key);

    // Recode the ascii-string to bits
    const Flexblock cleartext_bits = StringToBits(cleartext);

    // Encrypt our cleartext bits
    const Flexblock ciphertext_bits = cipher.Encipher(cleartext_bits);

    // Recode the ciphertext bits to a hex-string
    const std::string ciphertext = BitsToHexstring(ciphertext_bits);

    // Return it
    return ciphertext;
  }

  std::string GhettoCryptWrapper::DecryptString(const std::string& ciphertext, const std::string& password) {
    // Instanciate our cipher and supply a key
    const Block key = PasswordToKey(password);
    Cipher cipher(key);

    // Recode the hex-string to bits
    const Flexblock ciphertext_bits = HexstringToBits(ciphertext);

    // Decrypt the ciphertext bits
    const std::string cleartext_bits = cipher.Decipher(ciphertext_bits);

    // Recode the cleartext bits to an ascii-string
    const std::string cleartext = BitsToString(cleartext_bits);

    // Return it
    return cleartext;
  }

  bool GhettoCryptWrapper::EncryptFile(const std::string& filename_in, const std::string& filename_out, const std::string& password, bool printProgressReport) {
    try {
      // Read the file to bits
      const Flexblock cleartext_bits = ReadFileToBits(filename_in);

      // Instanciate our cipher and supply a key
      const Block key = PasswordToKey(password);
      Cipher cipher(key);

      // Encrypt our cleartext bits
      const Flexblock ciphertext_bits = cipher.Encipher(cleartext_bits, printProgressReport);

      // Write our ciphertext bits to file
      WriteBitsToFile(filename_out, ciphertext_bits);

      return true;
    }
    catch (std::runtime_error&) {
      return false;
    }
  }

  bool GhettoCryptWrapper::DecryptFile(const std::string& filename_in, const std::string& filename_out, const std::string& password, bool printProgressReport) {
    try {
      // Read the file to bits
      const Flexblock ciphertext_bits = ReadFileToBits(filename_in);

      // Instanciate our cipher and supply a key
      const Block key = PasswordToKey(password);
      Cipher cipher(key);

      // Decrypt the ciphertext bits
      const Flexblock cleartext_bits = cipher.Decipher(ciphertext_bits, printProgressReport);

      // Write our cleartext bits to file
      WriteBitsToFile(filename_out, cleartext_bits);

      return true;
    }
    catch (std::runtime_error&) {
      return false;
    }
  }

}