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API's - QSYCHGPW & QWCRSVAL
Using Api(s) QWCRSVAL and QSYCHGPW
(retrieve system value and change password)
Also cool SQL generate random number..
I wrote a sample program (and I mean sample)
that when passed your current password and
your new password the program will loop thru until
it changes you password to the new password.
I know sounds just like the CHGPWD command....
well I check to system values the minimum password length
and the Duplicate password control. This is what controls
the looping. There are many more system values *SEC that
can be used to make this program more bullet proof....but that
was not the goal. The goal was to demonstrate the use of these
API's.
Let me know what you think
(retrieve system value and change password)
Also cool SQL generate random number..
I wrote a sample program (and I mean sample)
that when passed your current password and
your new password the program will loop thru until
it changes you password to the new password.
I know sounds just like the CHGPWD command....
well I check to system values the minimum password length
and the Duplicate password control. This is what controls
the looping. There are many more system values *SEC that
can be used to make this program more bullet proof....but that
was not the goal. The goal was to demonstrate the use of these
API's.
Let me know what you think
PHP Code:
~
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
*
/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