A simple and secured way to encrypt and decrypt data in Oracle with DBMS_OBFUSCATION_TOOLKIT package. DBMS_OBFUSCATION_TOOLKIT enables an application to encrypt data using either the Data Encryption Standard (DES) or the Triple DES algorithms. Below is the database packaged function example to encrypt data in Oracle using PL SQL.
The following Toolkit package uses DBMS_OBFUSCATION_TOOLKIT package to encrypt and decrypt data.
Note: You must modify the key defined in this package to have your custom secret encryption method. The data is encrypted by the key can be decrypt only with that key. Learn More...
Usage to encrypt data in Oracle:
Select toolkit.encrypt('The test data 123.') From Dual;
Shows: ----------- 5C8ADD7B98919FC937A53AB986782EA9EE63D4ADDF7CA322
To decrypt data:
select Toolkit.decrypt('5C8ADD7B98919FC937A53AB986782EA9EE63D4ADDF7CA322') from dual;
Shows: ----------- The test data 123.
Create Or Replace PACKAGE Toolkit As FUNCTION encrypt (p_text In VARCHAR2) RETURN RAW; FUNCTION decrypt (p_raw In RAW) RETURN VARCHAR2; END Toolkit; /
Create Or Replace PACKAGE BODY Toolkit As ---- the custom key for g_key RAW(32767) := UTL_RAW.cast_to_raw('20130417'); ---- the custom padding character g_pad_chr VARCHAR2(1) := '_'; PROCEDURE padstring (p_text In OUT VARCHAR2); FUNCTION encrypt (p_text In VARCHAR2) RETURN RAW Is l_text VARCHAR2(32767) := p_text; l_encrypted RAW(32767); BEGIN padstring(l_text); DBMS_OBFUSCATION_TOOLKIT.desencrypt(input => UTL_RAW.cast_to_raw(l_text), Key => g_key, encrypted_data => l_encrypted); RETURN l_encrypted; END; FUNCTION decrypt (p_raw In RAW) RETURN VARCHAR2 Is l_decrypted VARCHAR2(32767); BEGIN DBMS_OBFUSCATION_TOOLKIT.desdecrypt(input => p_raw, Key => g_key, decrypted_data => l_decrypted); RETURN Rtrim(UTL_RAW.cast_to_varchar2(l_decrypted), g_pad_chr); END; PROCEDURE padstring (p_text In OUT VARCHAR2) Is l_units NUMBER; BEGIN IF Length(p_text) Mod 8 > 0 Then l_units := Trunc(Length(p_text)/8) + 1; p_text := Rpad(p_text, l_units * 8, g_pad_chr); END IF; END; END Toolkit; /