base::byte_vector decrypt(base::const_byte_span data) const {
Expects(isValid());
constexpr auto kDecryptSize = 256;
auto result = base::byte_vector(kDecryptSize, gsl::byte {});
auto res = RSA_public_decrypt(kDecryptSize, reinterpret_cast<const unsigned char*>(data.data()), reinterpret_cast<unsigned char*>(result.data()), _rsa, RSA_NO_PADDING);
if (res < 0 || res > kDecryptSize) {
ERR_load_crypto_strings();
LOG(("RSA Error: RSA_public_encrypt failed, key fp: %1, result: %2, error: %3").arg(getFingerPrint()).arg(res).arg(ERR_error_string(ERR_get_error(), 0)));
return base::byte_vector();
} else if (auto zeroBytes = kDecryptSize - res) {
auto resultBytes = gsl::make_span(result);
base::move_bytes(resultBytes.subspan(zeroBytes - res, res), resultBytes.subspan(0, res));
base::set_bytes(resultBytes.subspan(0, zeroBytes - res), gsl::byte {});
}
return result;
}
DroidMemory& DroidMemory::operator<<(DroidMemory const& other)
{
setExp(getExp() + other.getExp());
setFingerPrint(getFingerPrint() ^ other.getFingerPrint());
return *this;
}
bool RSAPublicKey::encrypt(const void *data, std::string &result) const {
Expects(isValid());
result.resize(256);
int res = RSA_public_encrypt(256, reinterpret_cast<const unsigned char*>(data), reinterpret_cast<uchar*>(&result[0]), impl_->rsa, RSA_NO_PADDING);
if (res != 256) {
ERR_load_crypto_strings();
LOG(("RSA Error: RSA_public_encrypt failed, key fp: %1, result: %2, error: %3").arg(getFingerPrint()).arg(res).arg(ERR_error_string(ERR_get_error(), 0)));
return false;
}
return true;
}
void DroidMemory::setExp(size_t const value)
{
_exp = value;
}
DroidMemory& DroidMemory::operator<<(DroidMemory const& other)
{
setExp(getExp() + other.getExp());
setFingerPrint(getFingerPrint() ^ other.getFingerPrint());
return *this;
}
DroidMemory& DroidMemory::operator>>(DroidMemory& other) const
{
other.setExp(getExp() + other.getExp());
other.setFingerPrint(getFingerPrint() ^ other.getFingerPrint());
return other;
}
DroidMemory& DroidMemory::operator+=(DroidMemory const& other)
{
setExp(getExp() + other.getExp());
setFingerPrint(getFingerPrint() ^ other.getFingerPrint());
return *this;
}
DroidMemory& DroidMemory::operator+=(size_t const& val)
{
setExp(getExp() + val);
setFingerPrint(getFingerPrint() ^ val);
return *this;
