下面我们来看看oracle中通过DBMS_CRYPTO包对表敏感字段进行加密方法，有需要了解的朋友可一起来看看吧.
在安全越来越重视的近体，我们不少时候需要对数据库中的某个表的敏感列数据(银行卡,身份证号码,金额等)进行加密，方式数据泄密,在11.2.0.4中可以通过dbms_crypto包方式实现,增加oracle的加密效率,本文提供处理思路,其他可以根据需求尽情发挥
数据库版本
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
PL/SQL Release 11.2.0.4.0 - Production
CORE 11.2.0.4.0 Production
TNS for Linux: Version 11.2.0.4.0 - Production
NLSRTL Version 11.2.0.4.0 - Production
[/shell]
<strong>创建加密函数</strong>
1
SQL> create or replace function f_Encrypt_number(number_in in varchar2) return raw is
2 number_in_raw RAW(128):=UTL_I18N.STRING_TO_RAW(number_in,'AL32UTF8');
3 key_number number(32):=32432432343243279898;
4 key_raw RAW(128):=UTL_RAW.cast_from_number(key_number);
5 encrypted_raw RAW(128);
6 begin
7 encrypted_raw:=dbms_crypto.Encrypt(src=>number_in_raw,typ=>DBMS_CRYPTO.DES_CBC_PKCS5,key=>key_raw);
8 return encrypted_raw;
9 end;
10 /
Function created.
测试加密函数
SQL> select f_Encrypt_number('wwww.111cn.net') from dual;
F_ENCRYPT_NUMBER('WWWW.111cn.net')
--------------------------------------------------------------------------------
003CB89CB77F6644C93AE2CF7810B0E3E3B10B8C60B54058
创建解密函数
SQL> create or replace function f_decrypt_number (encrypted_raw IN RAW)
2 return varchar2 is
3 decrypted_raw raw(48);
4 key_number number(32):=32432432343243279898;
5 key_raw RAW(128):=UTL_RAW.cast_from_number(key_number);
6 begin
7 decrypted_raw := DBMS_CRYPTO.DECRYPT
8 (
9 src => encrypted_raw,
10 typ => DBMS_CRYPTO.DES_CBC_PKCS5,
11 key => key_raw
12 );
13 return UTL_I18N.RAW_TO_CHAR (decrypted_raw, 'AL32UTF8');
14 END;
15 /
Function created.
测试解密函数
SQL> select f_decrypt_number('003CB89CB77F6644C93AE2CF7810B0E3E3B10B8C60B54058') from dual;
F_DECRYPT_NUMBER('003CB89CB77F6644C93AE2CF7810B0E3E3B10B8C60B54058')
--------------------------------------------------------------------------------
wwww.111cn.net
创建表综合测试
SQL> create table xifenfei_crypto
2 (id number, name varchar2(20),en_name raw(128)) ;
Table created.
SQL> insert into xifenfei_crypto (id,name) select object_id,object_name from dba_objects where rownum<10;
9 rows created.
SQL> commit;
Commit complete.
SQL> select * from xifenfei_crypto;
ID NAME EN_NAME
---------- -------------------- ------------------------------
20 ICOL$
46 I_USER1
28 CON$
15 UNDO$
29 C_COBJ#
3 I_OBJ#
25 PROXY_ROLE_DATA$
41 I_IND1
54 I_CDEF2
9 rows selected.
SQL> update xifenfei_crypto set en_name=f_Encrypt_number(name);
9 rows updated.
SQL> commit;
Commit complete.
SQL> select * from xifenfei_crypto;
ID NAME EN_NAME
---------- -------------------- --------------------------------------------------
20 ICOL$ FE17B031331839A9
46 I_USER1 FEF96765B1E2C53C
28 CON$ 0283FCE900ACED5C
15 UNDO$ 20DD92762F199436
29 C_COBJ# A0CB43E2EA6BA889
3 I_OBJ# F2DE1B9C8A39AA3D
25 PROXY_ROLE_DATA$ 62B99C02EBD4B250311E4490207FEF18CBD8CD8FBA1BFD81
41 I_IND1 3F4C3C186F8E2F52
54 I_CDEF2 CA23D202802BD3AC
9 rows selected.
SQL> select id,name,f_decrypt_number(EN_NAME) de_name,en_name from xifenfei_crypto;
ID NAME DE_NAME EN_NAME
---------- -------------------- ------------------------------ --------------------------------------------------
20 ICOL$ ICOL$ FE17B031331839A9
46 I_USER1 I_USER1 FEF96765B1E2C53C
28 CON$ CON$ 0283FCE900ACED5C
15 UNDO$ UNDO$ 20DD92762F199436
29 C_COBJ# C_COBJ# A0CB43E2EA6BA889
3 I_OBJ# I_OBJ# F2DE1B9C8A39AA3D
25 PROXY_ROLE_DATA$ PROXY_ROLE_DATA$ 62B99C02EBD4B250311E4490207FEF18CBD8CD8FBA1BFD81
41 I_IND1 I_IND1 3F4C3C186F8E2F52
54 I_CDEF2 I_CDEF2 CA23D202802BD3AC
9 rows selected.
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