keyring_keys_metadata_iterator_service_impl_template.h

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#ifndef KEYRING_KEYS_METADATA_SERVICE_IMPL_TEMPLATE_INCLUDED
#define KEYRING_KEYS_METADATA_SERVICE_IMPL_TEMPLATE_INCLUDED
 
#include <cstring>
#include <functional> /* std::function */
#include <memory>
 
#include <my_dbug.h>
#include <mysql/components/services/log_builtins.h> /* LogComponentErr */
#include <mysqld_error.h>
 
#include <components/keyrings/common/component_helpers/include/service_requirements.h>
#include <components/keyrings/common/data/data.h>
#include <components/keyrings/common/data/meta.h>
#include <components/keyrings/common/memstore/iterator.h>
#include <components/keyrings/common/operations/operations.h>
 
using keyring_common::data::Data;
using keyring_common::iterator::Iterator;
using keyring_common::meta::Metadata;
using keyring_common::operations::Keyring_operations;
 
namespace keyring_common {
namespace service_implementation {
 
/**
  Forward iterator initialization
 
  @param [out] it                 metadata iterator
  @param [in]  keyring_operations Reference to the object
                                  that handles cache and backend
  @param [in]  callbacks          Handle to component specific callbacks
 
  @returns Status of the operation
    @retval false Success
    @retval true  Failure
*/
template <typename Backend, typename Data_extension = Data>
bool init_keys_metadata_iterator_template(
    std::unique_ptr<Iterator<Data_extension>> &it,
    Keyring_operations<Backend, Data_extension> &keyring_operations,
    Component_callbacks &callbacks) {
  try {
    if (callbacks.keyring_initialized() == false) {
      return true;
    }
 
    if (keyring_operations.init_forward_iterator(it, false) == true) {
      return true;
    }
 
    return false;
  } catch (...) {
    LogComponentErr(ERROR_LEVEL, ER_KEYRING_COMPONENT_EXCEPTION, "init",
                    "keyring_keys_metadata_iterator");
    return true;
  }
}
 
/**
  Iterator deinitialization
 
  @param [out] it                 metadata iterator
  @param [in]  keyring_operations Reference to the object
                                  that handles cache and backend
  @param [in]  callbacks          Handle to component specific callbacks
 
  @returns Status of the operation
    @retval false Success
    @retval true  Failure
*/
template <typename Backend, typename Data_extension = Data>
bool deinit_keys_metadata_iterator_template(
    std::unique_ptr<Iterator<Data_extension>> &it,
    Keyring_operations<Backend, Data_extension> &keyring_operations,
    Component_callbacks &callbacks) {
  try {
    if (callbacks.keyring_initialized() == false) {
      return true;
    }
    keyring_operations.deinit_forward_iterator(it);
    return false;
  } catch (...) {
    LogComponentErr(ERROR_LEVEL, ER_KEYRING_COMPONENT_EXCEPTION, "deinit",
                    "keyring_keys_metadata_iterator");
    return true;
  }
}
 
/**
  Check validity of the iterator
 
  @param [in] it                  metadata iterator
  @param [in] keyring_operations  Reference to the object
                                  that handles cache and backend
  @param [in]  callbacks          Handle to component specific callbacks
 
  @returns Validty of the iterator
    @retval true  Iterator is valid
    @retval false Iterator is invalid
*/
template <typename Backend, typename Data_extension = Data>
bool keys_metadata_iterator_is_valid(
    std::unique_ptr<Iterator<Data_extension>> &it,
    Keyring_operations<Backend, Data_extension> &keyring_operations,
    Component_callbacks &callbacks) {
  try {
    if (callbacks.keyring_initialized() == false) return false;
    return keyring_operations.is_valid(it);
  } catch (...) {
    LogComponentErr(ERROR_LEVEL, ER_KEYRING_COMPONENT_EXCEPTION, "is_valid",
                    "keyring_keys_metadata_iterator");
    return false;
  }
}
 
/**
  Move iterator forward.
 
  @param [out] it                 metadata iterator
  @param [in]  keyring_operations Reference to the object
                                  that handles cache and backend
  @param [in]  callbacks          Component specific callbacks
 
  @returns Status of the operation
    @retval false Success - indicates that iterator is pointing to next entry
    @retval true  Failure - indicates that iterator has reached the end
*/
template <typename Backend, typename Data_extension = Data>
bool keys_metadata_iterator_next(
    std::unique_ptr<Iterator<Data_extension>> &it,
    Keyring_operations<Backend, Data_extension> &keyring_operations,
    Component_callbacks &callbacks) {
  try {
    if (callbacks.keyring_initialized() == false) {
      return true;
    }
    if (keyring_operations.next(it) == true) {
      return true;
    }
    return false;
  } catch (...) {
    LogComponentErr(ERROR_LEVEL, ER_KEYRING_COMPONENT_EXCEPTION, "next",
                    "keyring_keys_metadata_iterator");
    return true;
  }
}
 
/**
  Fetch length of metadata for current key pointed by iterator
 
  @param [out]  it                 metadata iterator
  @param [out]  data_id_length     Length of data_id buffer
  @param [out]  auth_id_length     Length of auth_id buffer
  @param [in]   keyring_operations Reference to the object
                                   that handles cache and backend
  @param [in]  callbacks          Handle to component specific callbacks
 
  @returns Status of the operation
    @retval false Success
    @retval true  Failure
*/
template <typename Backend, typename Data_extension = Data>
bool keys_metadata_get_length_template(
    std::unique_ptr<Iterator<Data_extension>> &it, size_t *data_id_length,
    size_t *auth_id_length,
    Keyring_operations<Backend, Data_extension> &keyring_operations,
    Component_callbacks &callbacks) {
  try {
    if (callbacks.keyring_initialized() == false) {
      return true;
    }
 
    Data_extension data;
    Metadata metadata;
    if (keyring_operations.get_iterator_data(it, metadata, data) == true) {
      LogComponentErr(
          INFORMATION_LEVEL,
          ER_NOTE_KEYRING_COMPONENT_KEYS_METADATA_ITERATOR_FETCH_FAILED);
      return true;
    }
 
    *data_id_length = metadata.key_id().length();
    *auth_id_length = metadata.owner_id().length();
    return false;
  } catch (...) {
    LogComponentErr(ERROR_LEVEL, ER_KEYRING_COMPONENT_EXCEPTION, "get_length",
                    "keyring_keys_metadata_iterator");
    return true;
  }
}
/**
  Fetch metadata for current key pointed by iterator
 
  @param [out] it                 metadata iterator
  @param [out] data_id            ID information of current data
  @param [in]  data_id_length     Length of data_id buffer
  @param [out] auth_id            Owner of the key
  @param [in]  auth_id_length     Length of auth_id buffer
  @param [in]  keyring_operations Reference to the object
                                  that handles cache and backend
  @param [in]  callbacks          Handle to component specific callbacks
 
  @returns Status of the operation
    @retval false Success
    @retval true  Failure
*/
template <typename Backend, typename Data_extension = Data>
bool keys_metadata_get_template(
    std::unique_ptr<Iterator<Data_extension>> &it, char *data_id,
    size_t data_id_length, char *auth_id, size_t auth_id_length,
    Keyring_operations<Backend, Data_extension> &keyring_operations,
    Component_callbacks &callbacks) {
  try {
    if (callbacks.keyring_initialized() == false) {
      return true;
    }
 
    Data_extension data;
    Metadata metadata;
    if (keyring_operations.get_iterator_metadata(it, metadata, data) == true) {
      LogComponentErr(
          INFORMATION_LEVEL,
          ER_NOTE_KEYRING_COMPONENT_KEYS_METADATA_ITERATOR_FETCH_FAILED);
      return true;
    }
 
    if (metadata.key_id().length() >= data_id_length) {
      assert(false);
      return true;
    }
 
    if (metadata.owner_id().length() >= auth_id_length) {
      assert(false);
      return true;
    }
 
    memcpy(data_id, metadata.key_id().c_str(), metadata.key_id().length());
    data_id[metadata.key_id().length()] = '\0';
    memcpy(auth_id, metadata.owner_id().c_str(), metadata.owner_id().length());
    auth_id[metadata.owner_id().length()] = '\0';
    return false;
  } catch (...) {
    LogComponentErr(ERROR_LEVEL, ER_KEYRING_COMPONENT_EXCEPTION, "get",
                    "keyring_keys_metadata_iterator");
    return true;
  }
}
 
}  // namespace service_implementation
}  // namespace keyring_common
 
#endif  // !KEYRING_KEYS_METADATA_SERVICE_IMPL_TEMPLATE_INCLUDED