How to call Oracle MD5 hash function?

Question

I have below code. I am using Oracle 11g.

SELECT DBMS_OBFUSCATION_TOOLKIT.md5 (input => UTL_RAW.cast_to_raw(
  FIRST_NAME
  ||LAST_NAME
  )) md5_key ,
  FIRST_NAME ,
  LAST_NAME
FROM C_NAME_TAB
WHERE PKEY='1234'

How can i call this code? Can i directly execute this code in sqldeveloper?

Answer 1

In Oracle 12c you can use the function STANDARD_HASH. It does not require any additional privileges.

select standard_hash('foo', 'MD5') from dual;

---

The dbms_obfuscation_toolkit is deprecated (see Note here). You can use DBMS_CRYPTO directly:

select rawtohex(
    DBMS_CRYPTO.Hash (
        UTL_I18N.STRING_TO_RAW ('foo', 'AL32UTF8'),
        2)
    ) from dual;

Output:

ACBD18DB4CC2F85CEDEF654FCCC4A4D8

Add a lower function call if needed. More on DBMS_CRYPTO.

Answer 2

I would do:

select DBMS_CRYPTO.HASH(rawtohex('foo') ,2) from dual;

output:

DBMS_CRYPTO.HASH(RAWTOHEX('FOO'),2)
--------------------------------------------------------------------------------
ACBD18DB4CC2F85CEDEF654FCCC4A4D8