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MDEV-11759: Encryption code in MariaDB 10.1/10.2 causes

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compatibility problems

Pages that are encrypted contain post encryption checksum on
different location that normal checksum fields. Therefore,
we should before decryption check this checksum to avoid
unencrypting corrupted pages. After decryption we can use
traditional checksum check to detect if page is corrupted
or unencryption was done using incorrect key.

Pages that are page compressed do not contain any checksum,
here we need to fist unencrypt, decompress and finally
use tradional checksum check to detect page corruption
or that we used incorrect key in unencryption.

buf0buf.cc: buf_page_is_corrupted() mofified so that
compressed pages are skipped.

buf0buf.h, buf_block_init(), buf_page_init_low():
removed unnecessary page_encrypted, page_compressed,
stored_checksum, valculated_checksum fields from
buf_page_t

buf_page_get_gen(): use new buf_page_check_corrupt() function
to detect corrupted pages.

buf_page_check_corrupt(): If page was not yet decrypted
check if post encryption checksum still matches.
If page is not anymore encrypted, use buf_page_is_corrupted()
traditional checksum method.

If page is detected as corrupted and it is not encrypted
we print corruption message to error log.
If page is still encrypted or it was encrypted and now
corrupted, we will print message that page is
encrypted to error log.

buf_page_io_complete(): use new buf_page_check_corrupt()
function to detect corrupted pages.

buf_page_decrypt_after_read(): Verify post encryption
checksum before tring to decrypt.

fil0crypt.cc: fil_encrypt_buf() verify post encryption
checksum and ind fil_space_decrypt() return true
if we really decrypted the page.

fil_space_verify_crypt_checksum(): rewrite to use
the method used when calculating post encryption
checksum. We also check if post encryption checksum
matches that traditional checksum check does not
match.

fil0fil.ic: Add missed page type encrypted and page
compressed to fil_get_page_type_name()

Note that this change does not yet fix innochecksum tool,
that will be done in separate MDEV.

Fix test failures caused by buf page corruption injection.
This commit is contained in:
Jan Lindström
2017-02-06 10:47:55 +02:00
parent bc4686f0f4
commit ddf2fac733
36 changed files with 935 additions and 818 deletions
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2
mysql-test/suite/encryption/r/innodb-bad-key-change.result
View File

@ -2,7 +2,7 @@ call mtr.add_suppression("Plugin 'file_key_management' init function returned er
call mtr.add_suppression("InnoDB: Database page corruption on disk or a failed.*");
call mtr.add_suppression("Plugin 'file_key_management' registration.*failed");
call mtr.add_suppression("InnoDB: Block in space_id .* in file test/.* encrypted");
call mtr.add_suppression("InnoDB: However key management plugin or used key_id .* is not found or used encryption algorithm or method does not match.");
call mtr.add_suppression("InnoDB: However key management plugin or used key_version .* is not found or used encryption algorithm or method does not match.");
call mtr.add_suppression("InnoDB: Marking tablespace as missing. You may drop this table or install correct key management plugin and key file.");
call mtr.add_suppression(".*InnoDB: Cannot open table test/.* from the internal data dictionary of InnoDB though the .frm file for the table exists. See .* for how you can resolve the problem.");
call mtr.add_suppression("InnoDB: .ibd file is missing for table test/.*");