Function GetKey

cpp/src/parquet/encryption/encryption.h:63–71

  void PutKey(uint32_t key_id, ::arrow::util::SecureString key);

  ::arrow::util::SecureString GetKey(const std::string& key_id_string) override {
    // key_id_string is string but for IntegerKeyIdRetriever it encodes
    // a native-endian 32 bit unsigned integer key_id
    uint32_t key_id;
    assert(key_id_string.size() == sizeof(key_id));
    memcpy(&key_id, key_id_string.data(), sizeof(key_id));

    return key_map_.at(key_id);
  }

 private:
  std::map<uint32_t, ::arrow::util::SecureString> key_map_;