Using QWCRSVAL to change password (QSYCHGPW)

The Retrieve System Values (QWCRSVAL) API lets you retrieve system values.

This is for example use only — We do not recommend use of this program to bypass enterprise security policies.

In this example system values that are associated with passwords are used to determine the password change policies of your enterprise. The program then changes passwords the required amount of times, prints a report of changed passwords, including the *NEW current password.

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h Option(*SrcStmt: *NoDebugIO)
*
FQSYSPRT O F 132 PRINTER OFLIND(*INOF)
*--------------------------------------------------------
//
// Entry Plist
//

d @CHGPASS pr
d InCurrent 10
d InNew 10

d @CHGPASS pi
d InCurrent 10
d InNew 10

*
* Variable Definition
*
d letters c CONST('AEIOUBCDFGHJKLMNPQRSTVWXZ012-
d 3456789')
d lastchar s 1
d newpass s 10
d numbercorrect s 2 0
d numberrequired s 2 0
d oldpass s 10
d random s 2 0
d value s 10
d BinaryValue s 4b 0
d w_SrlNbr s 8
d w_Rcvr s 36a
d w_RcvrLngth s 10i 0 inz(%len(w_Rcvr))
d w_NbrToRtv s 10i 0 inz(1)
d w_SysVal s 10a inz('QPWDRQDDIF')
d workPass s 10

d DS_SysValTbl ds
d d_ValsRtn 10i 0
d d_Offset 10i 0
d d_filler 08a
d d_SysVal 10a
d d_ValType 1a
d d_InfoSts 1a
d d_DtaLngth 10i 0
d d_Data 10a

d changePW PR EXTpgm('QSYCHGPW')
d userid 10
d currentPW 10
d newPW 10
d error 15
*
d ds_Error Ds 15
d BytesProvided 10I 0 inz(%size(ds_Error))
d BytesAvail 10I 0
d ErrorId 7

d QWCRSVAL pr extpgm('QWCRSVAL')
d p_Rcvr Like(w_Rcvr)
d p_RcvrLngth Like(w_RcvrLngth)
d p_NbrToRtv Like(w_NbrToRtv)
d p_SysVal Like(w_SysVal)
d p_Error Like(DS_Error)

*
d area51 ds
d Whole9Yards 4
d MinPassLength 10i 0 overlay(Whole9Yards:1)

*
* Program Info
*
d SDS
d @PGM 1 10
d @PARMS 37 39 0
d @MSGDTA 91 170
d @MSGID 171 174
d @JOB 244 253
d @USER 254 263
d @JOB# 264 269 0
*
d Shorts e ds extname(INRSHRT)

/Free

//--------------------------------------------------------
// MAIN PROGRAM - QPWDRQDDIF
//--------------------------------------------------------

exsr Hskpg;

if %len(%trim(InNew)) >= MinPassLength and
%subst(InNew:1:1) >= 'A' and
%subst(InNew:1:1) <= 'Z';

oldpass = InCurrent;
newpass = InNew;

dou ErrorId = *blanks and numbercorrect >
numberrequired;

clear workpass;
dou %len(%trim(WorkPass)) = MinPassLength;

dou random <> *zeros;
exsr $getRandom;
enddo;

lastchar = %subst(letters:Random:1);
workpass = %trim(workPass) + lastchar;
enddo;

clear ErrorId;
changePW( @user : OldPass : WorkPass : ds_Error );

if *inof = *on;
except head;
*inof = *off;
endif;

except detail;

if ErrorId = *blanks;
numbercorrect +=1;
oldpass = workpass;
endif;

enddo;
changePW( @user : OldPass : newpass : ds_Error );
except detail;
endif;

*inlr = *on;

//--------------------------------------------------------
// $getRandom - Generate random number
//--------------------------------------------------------

begsr $getRandom;

clear Random;
/end-free

c/Exec SQL
c+ Select Rand() * 036 Into :Random
c+ From SYSIBM/SYSDUMMY1
c/End-Exec

/free

endsr;

//--------------------------------------------------------
// Hskpg - one time run subroutine
//--------------------------------------------------------

begsr Hskpg;

except head;

w_SysVal = 'QPWDRQDDIF';
QWCRSVAL(w_Rcvr :
w_RcvrLngth :
w_NbrToRtv :
w_SysVal :
ds_Error );

DS_SysValTbl = w_Rcvr;
Value = %subst(d_Data:1:d_DtaLngth);

//0=Can be the same as old passwords
//1=Cannot be the same as last 32
//2=Cannot be the same as last 24
//3=Cannot be the same as last 18
//4=Cannot be the same as last 12
//5=Cannot be the same as last 10
//6=Cannot be the same as last 8
//7=Cannot be the same as last 6
//8=Cannot be the same as last 4

select;
when value = '1';
numberrequired = 32;
when value = '2';
numberrequired = 24;
when value = '3';
numberrequired = 18;
when value = '4';
numberrequired = 12;
when value = '5';
numberRequired = 10;
when value = '6';
numberRequired = 8;
when value = '7';
numberRequired = 6;
when value = '8';
numberRequired = 4;
endsl;

w_SysVal = 'QPWDMINLEN';
QWCRSVAL(w_Rcvr :
w_RcvrLngth :
w_NbrToRtv :
w_SysVal :
ds_Error );

DS_SysValTbl = w_Rcvr;

// this system value is actually in binary...

if d_ValType = 'B';
Whole9Yards =
%subst(d_Data:1:d_DtaLngth);
endif;

endsr;

/End-Free

OQSYSPRT E HEAD 1 03
O 10 'workpass'
O 30 'error'
O 45 'Password'

O E DETAIL 1
O workpass 20
O ErrorId 30
O newpass 45

Using QWCRSVAL to change password (QSYCHGPW)

Tagged on: QSYCHGPW QWCRSVAL

Jimmy.Octane

Using QWCRSVAL to change password (QSYCHGPW)

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