root@ythdc:/# su - oracle
oracle@ythdc:/home/oracle$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Thu Apr 1 12:30:32 2010

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> @?/rdbms/admin/dbmsobtk.sql

Library created.

No errors.

Library created.

No errors.

Package created.

Synonym created.

Package created.

No errors.

Synonym created.

Grant succeeded.

No errors.

Package created.

No errors.

Synonym created.

SQL> CREATE OR REPLACE FUNCTION return_encrypted_data(data IN VARCHAR)
2    RETURN RAW IS
3    key             VARCHAR(16) := 'A1B2C3D4E5F6G7H8';
4    encryption_mode NUMBER := DBMS_CRYPTO.ENCRYPT_AES128 +
5                              DBMS_CRYPTO.CHAIN_CBC + DBMS_CRYPTO.PAD_PKCS5;
6 BEGIN
7    RETURN DBMS_CRYPTO.ENCRYPT(UTL_I18N.STRING_TO_RAW(data, 'AL32UTF8'),
8                               encryption_mode,
9                               UTL_I18N.STRING_TO_RAW(key, 'AL32UTF8'));
10 END;
11 /

Function created.

SQL> CREATE OR REPLACE FUNCTION return_decrypted_data(data IN RAW)
2    RETURN VARCHAR IS
3    key             VARCHAR(16) := 'A1B2C3D4E5F6G7H8';
4    encryption_mode NUMBER := DBMS_CRYPTO.ENCRYPT_AES128 +
5                              DBMS_CRYPTO.CHAIN_CBC + DBMS_CRYPTO.PAD_PKCS5;
6 BEGIN
7    RETURN UTL_RAW.CAST_TO_VARCHAR2(DBMS_CRYPTO.DECRYPT(data,
8                                                        encryption_mode,
9                                                        UTL_I18N.STRING_TO_RAW(key,
10                                                                               'AL32UTF8')));
11 END;
12 /

Function created.

SQL> select return_encrypted_data('xiaoyang') from dual;

RETURN_ENCRYPTED_DATA('XIAOYANG')
--------------------------------------------------------------------------------
369117C7BDCE806C60243E53F90AD136

SQL> select return_decrypted_data('369117C7BDCE806C60243E53F90AD136') from dual;

RETURN_DECRYPTED_DATA('369117C7BDCE806C60243E53F90AD136')
--------------------------------------------------------------------------------
xiaoyang

SQL>

Oracle對資料進行加密&解密處理

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