Field Masking - Context based masking scenario in ...

AmitKrSingh · ‎2021 Jun 12

Introduction

In this blog post, we will learn how to mask “Tax Number" field based on “Tax Number Category” information of table DFKKBPTAXNUM in SE16 and BP transaction.

“Tax Number” field of table DFKKBPTAXNUM in SE16 and BP transaction need to be masked where “Tax Number Category" is “US01”. For other "Tax Number Category", "Tax Number" field will appear as unmasked.

A PFCG Role will be used for the authorization check which will allow users with the specified role to view the field value. If a user does not have this role, it means the user is not authorized and data will be protected either through masking, clearing, or disabling the field.

The end result for unauthorized users will look like below:

SE16 – ALV Grid Display

Masking is also supported in Display, Detail, Double-Click, Print, and Download scenario for SE16 ALV Grid Display in this scenario.

SE16 – ALV List

Masking is also supported in Display, Detail, Double-Click, and Download scenario for SE16 ALV List in this scenario.

SE16 – Standard List

Masking is also supported in Display, Detail, and Double-Click scenario for SE16 Standard List in this scenario.

SE16N

Masking is also supported in Detail, Double-Click, Views-List Output, View-Excel In-place, and Download scenario for SE16N in this scenario.

BP - Identification tab - Tax Numbers section

What is Context based Masking?

Attributes that deal with time, location or dynamic aspects is called Context (environment) attribute. Masking a field based on context attribute is called Context based-masking.

e.g. – Masking the salary of employees who belong to Germany.

Prerequisite

“Field Masking for SAP GUI” is a solution to protect sensitive data on SAP GUI screens at field level.Product “Field Masking for SAP GUI” is delivered to customer as add-on (UIM 100). To achieve Role based masking, Add-on UIM 100 must be installed in customer system.

Requirement

Context-based masking is required for SE16 and BP transaction, “Tax Number” field of table DFKKBPTAXNUM in SE16 and BP transaction need to be masked where “Tax Number Category" is “US01”. For other "Tax Number Category", "Tax Number" field will appear as unmasked.

Maintain Masking configuration

Configure Technical Information (Table Name-Field Name) of field in masking configuration.

You can get the Technical Address of a GUI field by pressing “F1” on the field.

Follow the given path:

SPRO -> SAP NetWeaver -> Field Masking for SAP GUI -> Masking Configuration->Maintain Masking Configuration

Follow below mentioned steps:

Click on “New Entries” button

Enter “Table Name” as “DFKKBPTAXNUM”

Enter “Field Name” as “TAXNUM”

Enter “PFCG Role Name” as “/UIM/PFCG_ROLE“. In this example, we have used a blank role “/UIM/PFCG_ROLE”. Customers can use any role as per their requirement.

Check “Masking Control” checkbox”

Click on “Save” button

Follow below mentioned steps:

Click on “New Entries” button

Enter “Table Name” as “DFKKBPTAXNUM”

Enter “Field Name” as “TAXNUMXL”

Enter “PFCG Role Name” as “/UIM/PFCG_ROLE“. In this example, we have used a blank role “/UIM/PFCG_ROLE”. Customers can use any role as per their requirement.

Check “Masking Control” checkbox”

Click on “Save” button

Mass Configuration

For the above entries, “Mass Configuration” report should be executed which is required to generate technical addresses.

Follow below mentioned steps:

Select the entry

Click on “Mass Configuration” button

Click on “Select All” button

Click on “Generate Customizing” button

Save the information

BAdI Implementation

Context-based masking can be achieved by implementing Masking BAdI /UIM/BD_MASKING

Create BAdI implementation for method PREPARE_MASK_DATA

Sample code is given below –

method /UIM/IF_UISECURITY~PREPARE_MASK_DATA.



  DATA: lv_taxnum       TYPE BPTAXNUM,

        ls_dfkkbptaxnum TYPE dfkkbptaxnum.



"-- Mask taxnumber in table DFKKBPTAXNUM output and BP transaction for tax category US1

  CHECK cs_mask_data-tabname EQ 'DFKKBPTAXNUM' AND ( cs_mask_data-fldname EQ 'TAXNUM' OR cs_mask_data- 

  fldname EQ 'TAXNUMXL' ).

  ASSIGN cs_mask_data-original_val->* TO FIELD-SYMBOL(<fs_taxnum>).

  lv_taxnum = <fs_taxnum>      .



  SELECT SINGLE * FROM dfkkbptaxnum INTO ls_dfkkbptaxnum WHERE taxnum  = lv_taxnum..

  IF sy-subrc = 0 AND ls_dfkkbptaxnum-taxtype = 'US1'.

  ELSE.

    cs_mask_data-masked_val = cs_mask_data-original_val.

  ENDIF.



endmethod.

Conclusion

In this blog post, we have learnt how Role-based masking is achieved for “Tax Number” field based on “Tax Number Category" information of table DFKKBPTAXNUM in SE16 and BP transaction.