check authorization
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Defining Authorization Objects
Defining Authorization Fields
Authorization Checks
For authorization checks, there are many ways of linking authorization objects with user actions in an R/3 system.
The following discusses three possibilities in the context of ABAP programming.
Authorization Check for Transactions
You can directly link authorization objects with transaction codes. You can enter values for the fields of an
authorization object in the transaction maintenance. Before the transaction is executed, the system compares
these values with the values in the user master record and only starts the transaction if the appropriate
authorization exists.
Authorization Check for ABAP Programs
For ABAP programs, the two objects S_DEVELOP (program development and program execution) and
S_PROGRAM (program maintenance) exist. They contains a field P_GROUP that is connected with the program
attribute authorization group. Thus, you can assign users program-specific authorizations for individual ABAP
programs.
Authorization Check in ABAP Programs
A more sophisticated, user-programmed authorization check is possible using the AUTHORITY-CHECK statement.
It allows you to check the entries in the user master record for specific authorization objects against any other
values. Therefore, if a transaction or program is not sufficiently protected or not every user that is authorized to
use the program can also execute all the actions, this statement must be used.
AUTHORITY-CHECK OBJECT
ID FIELD
ID FIELD
...
ID FIELD .
is the name of an authorization object. With , , and so on, you must listall
fields of theauthorization object . With , , and so on, you must specify the values that the system is to check
against the entries in the relevant authorization of the user master record. The AUTHORITY-CHECK statement
searches for the specified object in the user profile and checks the users authorizations for all values of . You
can avoid checking a field by replacing FIELD with DUMMY.
After the FIELD addition, you can only specify an elementary field, not a selection table. However, there are
function modules available that execute the AUTHORITY-CHECK statement for all values of selection tables. The
AUTHORITY-CHECK statement is supported by a statement pattern.
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Only if the user has all authorizations, is the return value SY-SUBRC of the AUTHORITY-CHECK statement set to 0.
The most important return values are:
0: The user has an authorization for all specified values.
4: The user does not have the authorization.
8: The number of specified fields is incorrect.
12: The specified authorization object does not exist.
A list of all possible return values is available in the ABAP keyword documentation. The content of SY-SUBRC has
to be closely examined to ascertain the result of the authorization check and react accordingly.
REPORT demo_authorithy_check.
PARAMETERS pa_carr LIKE sflight-carrid.DATA wa_flights LIKE demo_focc.
AT SELECTION-SCREEN.
AUTHORITY-CHECK OBJECT 'S_CARRID'ID 'CARRID' FIELD pa_carrID 'ACTVT' FIELD '03'.
IF sy-subrc = 4.MESSAGE e045(sabapdocu) WITH pa_carr.ELSEIF sy-subrc 0.MESSAGE e184(sabapdocu) WITH text-010.ENDIF.
START-OF-SELECTION.
SELECT carrid connid fldate seatsmax seatsoccFROM sflightINTO CORRESPONDING FIELDS OF wa_flightsWHERE carrid = pa_carr.
WRITE: / wa_flights-carrid,wa_flights-connid,wa_flights-fldate,wa_flights-seatsmax,wa_flights-seatsocc.
ENDSELECT.
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In this example, the system checks with the authorization object S_CARRID whether or not the user has a
display authorization (03) for the airline entered on a selection screen. If this is not the case, or a different
error occurs, the Selection Screen Processing goes back to the display of the selection screen.