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Diffstat (limited to 'storage/innobase/include/fil0crypt.ic')
-rw-r--r-- | storage/innobase/include/fil0crypt.ic | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/storage/innobase/include/fil0crypt.ic b/storage/innobase/include/fil0crypt.ic new file mode 100644 index 00000000000..b753ca5cb4f --- /dev/null +++ b/storage/innobase/include/fil0crypt.ic @@ -0,0 +1,69 @@ +/***************************************************************************** + +Copyright (c) 2015, MariaDB Corporation. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA + +*****************************************************************************/ + +/**************************************************//** +@file include/fil0fil.h +The low-level file system encryption support functions + +Created 04/01/2015 Jan Lindström +*******************************************************/ + +/*******************************************************************//** +Find out whether the page is page encrypted +@return true if page is page encrypted, false if not */ +UNIV_INLINE +bool +fil_page_is_encrypted( +/*==================*/ + const byte *buf) /*!< in: page */ +{ + return(mach_read_from_4(buf+FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION) != 0); +} + +/*******************************************************************//** +Find out whether the page can be decrypted. +The function for decrypting the page should already be executed before this. +@return PAGE_ENCRYPTION_KEY_MISSING if key provider is available, but key is not available + 0 if decryption should be possible +*/ +UNIV_INLINE +ulint +fil_page_encryption_status( +/*===================*/ + const byte *buf, /*!< in: page */ + ulint space_id) /*!< in: space_id */ +{ + ulint page_type = mach_read_from_2(buf+FIL_PAGE_TYPE); + + if (page_type == FIL_PAGE_TYPE_FSP_HDR) { + fil_space_crypt_t *crypt_data = fil_space_get_crypt_data(space_id); + + if (crypt_data != NULL) { + if (!has_encryption_key(crypt_data->keys[0].key_version)) { + /* accessing table would surely fail, because no key or no key provider available */ + return FIL_ENCRYPTION_KEY_MISSING; + } + } + } else { + ulint key = mach_read_from_4(buf + FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION); + if (!has_encryption_key(key)) { + return FIL_ENCRYPTION_KEY_MISSING; + } + } + return 0; +} |