Method add_fscrypt_key

src/client/Client.cc:18473–18491

#if defined(__linux__)
int Client::add_fscrypt_key(const char *key_data, int key_len,
                            char* keyid, int user)
{
  auto& key_store = fscrypt->get_key_store();

  FSCryptKeyHandlerRef kh;

  int r = key_store.create((const char *)key_data, key_len, kh, user);
  if (r < 0) {
    ldout(cct, 0) << __func__ << "(): failed to create a new key: r=" << r << dendl;
    return r;
  }

  auto& k = kh->get_key();
  if (keyid) {
    memcpy(keyid, &k->get_identifier().raw, FSCRYPT_KEY_IDENTIFIER_SIZE);
  }
  return 0;
}

int Client::remove_fscrypt_key(fscrypt_remove_key_arg* kid, int user)
{