技术分享 | OceanBase 安全审计之透明加密

爱可生开源社区 2023-09-14

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作者：张乾，外星人2号，兼任四位喵星人的铲屎官。

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本文约 1200 字，预计阅读需要 4 分钟。

承接前文 OceanBase 安全审计的传输加密，本文主要实践数据透明加密，并验证加密是否有效。

环境

版本：OceanBase 4.1.0.0 企业版

1加密配置

详细的加密步骤^[1] 略过，本次使用 MySQL 租户。

开启透明加密并创建表空间

管理员用户登录到集群的 MySQL 租户。

# 开启 internal 方式的透明加密
# tde_method 默认值为 none，表示关闭透明表空间加密
obclient [oceanbase]>  ALTER SYSTEM SET tde_method='internal';
Query OK, 0 rows affected (0.022 sec)
 
obclient [oceanbase]> SHOW PARAMETERS LIKE 'tde_method';
+-------+----------+-------------+----------+------------+-----------+----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+--------+---------+-------------------+
| zone  | svr_type | svr_ip      | svr_port | name       | data_type | value    | info                                                                                                                                                                                                 | section  | scope  | source  | edit_level        |
+-------+----------+-------------+----------+------------+-----------+----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+--------+---------+-------------------+
| zone1 | observer | 172.17.0.13 |     2882 | tde_method | NULL      | internal | none : transparent encryption is none, none means cannot use tde, internal : transparent encryption is in the form of internal tables, bkmi : transparent encryption is in the form of external bkmi | OBSERVER | TENANT | DEFAULT | DYNAMIC_EFFECTIVE |
+-------+----------+-------------+----------+------------+-----------+----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+--------+---------+-------------------+
1 row in set (0.017 sec)
 
# 执行该语句，生成主密钥
obclient [oceanbase]> ALTER INSTANCE ROTATE INNODB MASTER KEY;
Query OK, 0 rows affected (0.028 sec)
  
# 创建表空间并指定加密算法，其中 'y' 表示默认使用 aes-256 算法
obclient [oceanbase]> CREATE TABLESPACE sectest_ts1 encryption = 'y';
Query OK, 0 rows affected (0.021 sec)

在加密表空间内创建新表

普通用户登录到数据库的 MySQL 租户，创建新表 t1
。

# 创建表并指定表空间
obclient [sysbenchdb]> CREATE TABLE t1 (id1 int, id2 int) TABLESPACE sectest_ts1;
Query OK, 0 rows affected (0.076 sec)
  
# 确认表空间内的表是否标记为加密
# encryptionalg 为 aes-256，且 encrypted 为 YES 则表示表加密配置成功
obclient [oceanbase]> SELECT table_name,encryptionalg,encrypted FROM oceanbase.V$OB_ENCRYPTED_TABLES;
+------------+---------------+-----------+
| table_name | encryptionalg | encrypted |
+------------+---------------+-----------+
| t1         | aes-256       | YES       |
+------------+---------------+-----------+
1 row in set (0.048 sec)

往表内插入一条值，并做大合并，使值落盘 SSTable。

# 插入值
obclient [sysbenchdb]> insert into t1 values (147852369,999999991);
Query OK, 1 row affected (0.005 sec)
  
# 做大合并
ALTER SYSTEM MAJOR FREEZE TENANT=ALL;
  
# 查看合并进度
SELECT * FROM oceanbase.CDB_OB_ZONE_MAJOR_COMPACTION\G

创建一个不加密的表用以对比

普通用户登录到数据库的 MySQL 租户，创建不指定加密空间的新表 ttttttt2
。

同样插入一条数据，并做大合并。

obclient [sysbenchdb]> CREATE TABLE ttttttt2 (id1 int, id2 int);
Query OK, 0 rows affected (0.076 sec)
obclient [sysbenchdb]> insert into ttttttt2 values (147852369,999999991);
Query OK, 1 row affected (0.005 sec)
 
# 做大合并
ALTER SYSTEM MAJOR FREEZE TENANT=ALL;
 
# 查看合并进度
SELECT * FROM oceanbase.CDB_OB_ZONE_MAJOR_COMPACTION\G

2加密验证

验证方式是借助工具 ob_admin^[2]，其 dumpsst^[3] 功能可以显示 block_file 文件中的内容。

使用 dumpsst 来查看加密表的内容，验证是否加密。

使用前需要知道目标数据的 macro block id
，接下来先找到上面数据对应的 macro block id
。

查找 macro block id

先根据 oceanbase.DBA_OB_TABLE_LOCATIONS
找到两张表的 TABLET_ID
，其中加密表 t1
的 TABLET_ID
为 200001，未加密表 ttttttt2
的 TABLET_ID
为 200002。

obclient [oceanbase]> select * from oceanbase.DBA_OB_TABLE_LOCATIONS where TABLE_NAME='t1';
+---------------+------------+----------+------------+----------------+-------------------+------------+---------------+-----------+-------+-------+-------------+----------+--------+--------------+
| DATABASE_NAME | TABLE_NAME | TABLE_ID | TABLE_TYPE | PARTITION_NAME | SUBPARTITION_NAME | INDEX_NAME | DATA_TABLE_ID | TABLET_ID | LS_ID | ZONE  | SVR_IP      | SVR_PORT | ROLE   | REPLICA_TYPE |
+---------------+------------+----------+------------+----------------+-------------------+------------+---------------+-----------+-------+-------+-------------+----------+--------+--------------+
| sysbenchdb    | t1         |   500006 | USER TABLE | NULL           | NULL              | NULL       |          NULL |    200001 |  1001 | zone1 | 172.17.0.13 |     2882 | LEADER | FULL         |
+---------------+------------+----------+------------+----------------+-------------------+------------+---------------+-----------+-------+-------+-------------+----------+--------+--------------+
1 row in set (0.005 sec)
 
obclient [oceanbase]> select * from oceanbase.DBA_OB_TABLE_LOCATIONS where TABLE_NAME='ttttttt2';
+---------------+------------+----------+------------+----------------+-------------------+------------+---------------+-----------+-------+-------+-------------+----------+--------+--------------+
| DATABASE_NAME | TABLE_NAME | TABLE_ID | TABLE_TYPE | PARTITION_NAME | SUBPARTITION_NAME | INDEX_NAME | DATA_TABLE_ID | TABLET_ID | LS_ID | ZONE  | SVR_IP      | SVR_PORT | ROLE   | REPLICA_TYPE |
+---------------+------------+----------+------------+----------------+-------------------+------------+---------------+-----------+-------+-------+-------------+----------+--------+--------------+
| sysbenchdb    | ttttttt2   |   500007 | USER TABLE | NULL           | NULL              | NULL       |          NULL |    200002 |  1001 | zone1 | 172.17.0.13 |     2882 | LEADER | FULL         |
+---------------+------------+----------+------------+----------------+-------------------+------------+---------------+-----------+-------+-------+-------------+----------+--------+--------------+
1 row in set (0.005 sec)

拿着 TABLET_ID
，根据合并时间，在 GV$OB_TABLET_COMPACTION_HISTORY
^[4] 中找到 MACRO_ID_LIST
，其中记录的 ID
即是我们需要的 macro block id
。

从输出中，我们可以看到加密表 t1
对应的 macro block id
为 387，未加密表 ttttttt2
对应的 macro block id
为 718。

obclient [oceanbase]> select * from GV$OB_TABLET_COMPACTION_HISTORY where TABLET_ID=200001 and TYPE='MAJOR_MERGE'  order by START_TIME \G
*************************** 1. row ***************************
                              SVR_IP: 172.17.0.13
                            SVR_PORT: 2882
                           TENANT_ID: 1004
                               LS_ID: 1001
                           TABLET_ID: 200001
                                TYPE: MAJOR_MERGE
                      COMPACTION_SCN: 1685093467526445446
                          START_TIME: 2023-05-26 17:31:22.478149
                         FINISH_TIME: 2023-05-26 17:31:22.482045
                             TASK_ID: YB42AC11000D-0005FC95091493EB-0-0
                         OCCUPY_SIZE: 432
                   MACRO_BLOCK_COUNT: 1
       MULTIPLEXED_MACRO_BLOCK_COUNT: 0
        NEW_MICRO_COUNT_IN_NEW_MACRO: 1
MULTIPLEXED_MICRO_COUNT_IN_NEW_MACRO: 0
                     TOTAL_ROW_COUNT: 1
               INCREMENTAL_ROW_COUNT: 1
                   COMPRESSION_RATIO: 0.67
                 NEW_FLUSH_DATA_RATE: 100
        PROGRESSIVE_COMPACTION_ROUND: 1
          PROGRESSIVE_COMPACTION_NUM: 0
                     PARALLEL_DEGREE: 1
                       PARALLEL_INFO: -
                   PARTICIPANT_TABLE: table_cnt=4,[MAJOR]scn=1;[MINI]start_scn=1,end_scn=1685093478867382402;
                       MACRO_ID_LIST: 387
                            COMMENTS: serialize_medium_list:{cnt=1;1685093467526445446}|time_guard=EXECUTE=4.20ms|(0.79)|CREATE_SSTABLE=648us|(0.12)|total=5.32ms;
*************************** 2. row ***************************
                              SVR_IP: 172.17.0.13
                            SVR_PORT: 2882
                           TENANT_ID: 1004
                               LS_ID: 1001
                           TABLET_ID: 200001
                                TYPE: MAJOR_MERGE
                      COMPACTION_SCN: 1685094492266634220
                          START_TIME: 2023-05-26 17:48:27.276906
                         FINISH_TIME: 2023-05-26 17:48:27.282468
                             TASK_ID: YB42AC11000D-0005FC9509149878-0-0
                         OCCUPY_SIZE: 432
                   MACRO_BLOCK_COUNT: 1
       MULTIPLEXED_MACRO_BLOCK_COUNT: 0
        NEW_MICRO_COUNT_IN_NEW_MACRO: 1
MULTIPLEXED_MICRO_COUNT_IN_NEW_MACRO: 0
                     TOTAL_ROW_COUNT: 1
               INCREMENTAL_ROW_COUNT: 1
                   COMPRESSION_RATIO: 0.67
                 NEW_FLUSH_DATA_RATE: 71
        PROGRESSIVE_COMPACTION_ROUND: 1
          PROGRESSIVE_COMPACTION_NUM: 0
                     PARALLEL_DEGREE: 1
                       PARALLEL_INFO: -
                   PARTICIPANT_TABLE: table_cnt=3,[MAJOR]scn=1685093467526445446;[MINI]start_scn=1685093467530410154,end_scn=1685094504683817069;
                       MACRO_ID_LIST: 718
                            COMMENTS: serialize_medium_list:{cnt=1;1685094492266634220}|time_guard=EXECUTE=5.92ms|(0.45)|CREATE_SSTABLE=5.94ms|(0.45)|total=13.10ms;
  
obclient [oceanbase]> select * from GV$OB_TABLET_COMPACTION_HISTORY where TABLET_ID=200002 and TYPE='MAJOR_MERGE'  order by START_TIME \G
*************************** 1. row ***************************
                              SVR_IP: 172.17.0.13
                            SVR_PORT: 2882
                           TENANT_ID: 1004
                               LS_ID: 1001
                           TABLET_ID: 200002
                                TYPE: MAJOR_MERGE
                      COMPACTION_SCN: 1685094492266634220
                          START_TIME: 2023-05-26 17:48:27.277801
                         FINISH_TIME: 2023-05-26 17:48:27.284542
                             TASK_ID: YB42AC11000D-0005FC9509149879-0-0
                         OCCUPY_SIZE: 424
                   MACRO_BLOCK_COUNT: 1
       MULTIPLEXED_MACRO_BLOCK_COUNT: 0
        NEW_MICRO_COUNT_IN_NEW_MACRO: 1
MULTIPLEXED_MICRO_COUNT_IN_NEW_MACRO: 0
                     TOTAL_ROW_COUNT: 1
               INCREMENTAL_ROW_COUNT: 1
                   COMPRESSION_RATIO: 0.61
                 NEW_FLUSH_DATA_RATE: 40
        PROGRESSIVE_COMPACTION_ROUND: 1
          PROGRESSIVE_COMPACTION_NUM: 0
                     PARALLEL_DEGREE: 1
                       PARALLEL_INFO: -
                   PARTICIPANT_TABLE: table_cnt=4,[MAJOR]scn=1685093467526445446;[MINI]start_scn=1,end_scn=1685094504683817070;
                       MACRO_ID_LIST: 718
                            COMMENTS: serialize_medium_list:{cnt=1;1685094492266634220}|time_guard=EXECUTE=10.20ms|(0.86)|total=11.87ms;

解析 block_file 文件

安装完 ob_admin，使用 dumpsst 解析上个步骤拿到的 macro block id
。

注意：
ob_admin dumpsst 必须在 ${path_to_oceanbase}/oceanbase 层级运行，原因是读取 etc/observer.config.bin
使用的是相对路径。
目前测试下来，必须指定 --macro-id
，否则都会报错（报错内容需在 ob_admin.log 中查看）。

介绍本次使用的几个参数如下：

-f
指定 data 目录。
-d
宏块类型，目前仅支持 macro_block。
-a
即 macro-id
，填写上面步骤中获取的值。
-t
指定 tablet_id
，进一步精确范围。
-i
即 micro block id
，-1 表示所有 micro blocks。

解析 t1 表，即加密表

可以看到输出中 tablet_id
为 200001，row_count
为 1，对应我们插入的那一条数据。

其中并未展示这行数据内容，验证数据成功加密。

[admin@ob_4 oceanbase]$ ob_admin dumpsst  -f /home/admin/oceanbase/store/obdemo/  -d macro_block -a 387 -t 200001 -i -1
succ to open, filename=ob_admin.log, fd=3, wf_fd=2
old log_file need close, old = ob_admin.log new = ob_admin.log
succ to open, filename=ob_admin.log, fd=3, wf_fd=2
succ to open, filename=ob_admin_rs.log, fd=4, wf_fd=2
------------------------------{Common Header}------------------------------
|                   header_size|24
|                       version|1
|                         magic|1001
|                          attr|1
|                  payload_size|952
|              payload_checksum|-1027413104
--------------------------------------------------------------------------------
------------------------------{SSTable Macro Block Header}------------------------------
|                   header_size|208
|                       version|1
|                         magic|1007
|                     tablet_id|200001
|               logical_version|1685093467526445446
|                      data_seq|0
|                  column_count|5
|           rowkey_column_count|3
|                row_store_type|1
|                     row_count|1
|                   occupy_size|432
|             micro_block_count|1
|       micro_block_data_offset|232
|                 data_checksum|2617981320
|               compressor_type|6
|                 master_key_id|500004
--------------------------------------------------------------------------------
--------{column_index        column_type    column_order column_checksum  collation_type}----------
|       [0                  ObUInt64Type             ASC      3344869974              63]
|       [1                     ObIntType             ASC       313654433              63]
|       [2                     ObIntType             ASC      2388842353              63]
|       [3                   ObInt32Type             ASC      2776795072              63]
|       [4                   ObInt32Type             ASC        82537422              63]
--------------------------------------------------------------------------------

解析 ttttttt2 表，即未加密的表

替换命令中 tablet_id
和 macro block id
为 ttttttt2
表的 id
，进行解析。

对比加密表 t1
，未加密表输出信息更丰富，并且可以看到具体的数据内容。

此处精简展示，可以看到 Total Rows 中显示了前面插入的那条数据[{"INT":147852369}][{"INT":999999991}]。

[admin@ob_4 oceanbase]$ ob_admin dumpsst  -f /home/admin/oceanbase/store/obdemo/  -d macro_block -a 718 -t 200002 -i -1
succ to open, filename=ob_admin.log, fd=3, wf_fd=2
old log_file need close, old = ob_admin.log new = ob_admin.log
succ to open, filename=ob_admin.log, fd=3, wf_fd=2
succ to open, filename=ob_admin_rs.log, fd=4, wf_fd=2
------------------------------{Common Header}------------------------------
|                   header_size|24
|                       version|1
|                         magic|1001
|                          attr|1
|                  payload_size|892
|              payload_checksum|-1696352947
--------------------------------------------------------------------------------
------------------------------{SSTable Macro Block Header}------------------------------
|                   header_size|208
|                       version|1
|                         magic|1007
|                     tablet_id|200002
|               logical_version|1685094492266634220
|                      data_seq|0
|                  column_count|5
|           rowkey_column_count|3
|                row_store_type|1
|                     row_count|1
|                   occupy_size|424
|             micro_block_count|1
|       micro_block_data_offset|232
|                 data_checksum|725485397
|               compressor_type|6
|                 master_key_id|0
--------------------------------------------------------------------------------
……
------------------------------{Total Rows[1]}------------------------------
|ROW[0]:trans_id=[{txid:0}],dml_flag=[N|INSERT],mvcc_flag=[]|[{"BIGINT UNSIGNED":1}][{"BIGINT":-1685094482154160502}][{"BIGINT":0}][{"INT":147852369}][{"INT":999999991}]
……
------------------------------{Encoding Column Header[4]}------------------------------
|                          type|0
|                     attribute|0
|                 is fix length|0
|              has extend value|0
|                is bit packing|0
|             is last var field|0
|            extend value index|65542
|             store object type|0
|                        offset|0
|                        length|0
--------------------------------------------------------------------------------
------------------------------{Index Micro Block[0]}------------------------------
------------------------------{Total Rows[1]}------------------------------
|ROW[0]:trans_id=[{txid:0}],dml_flag=[N|INSERT],mvcc_flag=[]|[{"BIGINT UNSIGNED":1}][{"BIGINT":-1685094482154160502}][{"BIGINT":0}][{"VARCHAR":"
                         ", collation:"binary", coercibility:"NUMERIC"}]
|Index Block Row Header|[{version:1, row_store_type:1, compressor_type:6, is_data_index:1, is_data_block:1, is_leaf_block:0, is_major_node:1, is_pre_aggregated:0, is_deleted:0, contain_uncommitted_row:0, is_macro_node:0, has_string_out_row:0, all_lob_in_row:1, macro_id:[-1](ver=0,mode=0,seq=0), block_offset:232, block_size:192, master_key_id:0, encrypt_id:0, encrypt_key:"data_size:16, data:00000000000000000000000000000000", row_count:1, schema_version:1685094464567160, macro_block_count:0, micro_block_count:1}]
------------------------------{Macro Meta Micro Block}------------------------------
------------------------------{Encoding Micro Header}------------------------------
|                   header_size|96
|                       version|2
|                         magic|1005
|                  column_count|4
|           rowkey_column_count|3
|                     row_count|1
|                row_store_type|2
|                row_index_byte|0
|              var_column_count|0
|               row_data_offset|357
|column_chksum[              0]|3344869974
|column_chksum[              1]|1868627082
|column_chksum[              2]|2388842353
|column_chksum[              3]|1583982749
--------------------------------------------------------------------------------
……