# The create\_passthrough\_verify\_fcn procedure
<a name="Appendix.Oracle.CommonDBATasks.CustomPassword.Custom"></a>

The `create_passthrough_verify_fcn` procedure is supported for all versions of RDS for Oracle.

You can create a custom function to verify passwords by using the Amazon RDS procedure `rdsadmin.rdsadmin_password_verify.create_passthrough_verify_fcn`. The `create_passthrough_verify_fcn` procedure has the following parameters. 


****  

| Parameter name | Data type | Default | Required | Description | 
| --- | --- | --- | --- | --- | 
| `p_verify_function_name` | varchar2 | — | Yes | The name for your custom verification function. This is a wrapper function that is created for you in the SYS schema, and it doesn't contain any verification logic. You assign this function to user profiles.  | 
| `p_target_owner` | varchar2 | — | Yes | The schema owner for your custom verification function. | 
| `p_target_function_name` | varchar2 | — | Yes | The name of your existing custom function that contains the verification logic. Your custom function must return a boolean. Your function should return `true` if the password is valid and `false` if the password is invalid.  | 

The following example creates a password verification function that uses the logic from the function named `PASSWORD_LOGIC_EXTRA_STRONG`. 

```
begin
    rdsadmin.rdsadmin_password_verify.create_passthrough_verify_fcn(
        p_verify_function_name => '{{CUSTOM_PASSWORD_FUNCTION}}', 
        p_target_owner         => '{{TEST_USER}}',
        p_target_function_name => '{{PASSWORD_LOGIC_EXTRA_STRONG}}');
end;
/
```

To associate the verification function with a user profile, use `alter profile`. The following example associates the verification function with the `DEFAULT` user profile. 

```
ALTER PROFILE {{DEFAULT}} LIMIT PASSWORD_VERIFY_FUNCTION {{CUSTOM_PASSWORD_FUNCTION}};
```