PolarDB O Edition is compatible with Oracle databases and provides the MD5 functions and stored procedures of the DBMS_OBFUSCATION_TOOLKIT package.

Usage notes

When you create a PolarDB O Edition database for a PolarDB-O cluster created on or after March 30, 2020, the DBMS_OBFUSCATION_TOOLKIT plug-in is automatically created.

When you create a PolarDB O Edition database for a PolarDB-O cluster created before March 30, 2020, the DBMS_OBFUSCATION_TOOLKIT plug-in is not automatically created. To use the plug-in, you must execute the following statement to manually create the plug-in after you create the database: 

CREATE EXTENSION polar_dbms_obfuscation_toolkit;

For more information about the plug-in, see DBMS_OBFUSCATION_TOOLKIT.

Interfaces

Interface Type Data type of the input parameter Data type of the output
dbms_obfuscation_toolkit.md5 Function BYTEA RAW_CHECKSUM
dbms_obfuscation_toolkit.md5 Stored procedure BYTEA RAW_CHECKSUM
dbms_obfuscation_toolkit.md5 Function CHARACTER VARYING CHARACTER VARYING
dbms_obfuscation_toolkit.md5 Stored procedure CHARACTER VARYING CHARACTER VARYING

Usage method

-- Run the MD5 functions.
select dbms_obfuscation_toolkit.md5('a'::varchar2);
select dbms_obfuscation_toolkit.md5('a'::raw);

-- Run the stored procedures.
exec dbms_obfuscation_toolkit.md5(input=>'a');
exec dbms_obfuscation_toolkit.md5(input_string=>'a');

-- Use the MD5 algorithm to encrypt data in the stored procedure.
declare
  input varchar2(100):= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  checksum1 raw(100);
  checksum2 varchar2(100);
begin
  dbms_obfuscation_toolkit.md5(input=>utl_raw.cast_to_raw(input), checksum=>checksum1);
  dbms_obfuscation_toolkit.md5(input_string=>input, checksum_string=>checksum2);
  dbms_output.put_line(checksum1);
  dbms_output.put_line(utl_raw.cast_to_raw(checksum2));
end;