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Routine: PRCSC2

PRCSC2.m

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  1. PRCSC2 ;WISC/LEM-ESIG MAINTENANCE ROUTINE ;3/3/95 3:22 PM
  1. V ;;5.1;IFCAP;;Oct 20, 2000
  1. ;Per VHA Directive 10-93-142, this routine should not be modified.
  1. ;ROUTINE FOR MAINTAINING FIELD 29.5 (OBLIGATION E S CODE), FILE 410
  1. DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
  1. ;returns "" if unsuccessful
  1. NEW RECORD,RECORD4,VERSION,PERSON,SIG,CHECKSUM
  1. ;get record and check version
  1. S RECORD=$G(^PRCS(410,LEVEL0,0)) I RECORD="" QUIT ""
  1. S RECORD4=$G(^PRCS(410,LEVEL0,4))
  1. S VERSION=$P(RECORD4,"^",11)
  1. S PERSON=+$P(RECORD4,"^",9)
  1. I VERSION'="",VERSION'=1 Q ""
  1. S SIG=$P(RECORD4,"^",10)
  1. D1 ;decode e signature for version 1
  1. S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD4))
  1. QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
  1. ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
  1. ;Parameter passing entry point
  1. NEW RECORD,RECORD4,SIGBLOCK,CHECKSUM,OLDUSER
  1. ;get record
  1. S USERNUM=+USERNUM
  1. I USERNUM=0 S Y=-3 QUIT ;-3 no user num available
  1. S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
  1. I SIGBLOCK="" S Y=-2 QUIT ;-2 no sigblock in file 200
  1. S RECORD=$G(^PRCS(410,LEVEL0,0))
  1. S RECORD4=$G(^PRCS(410,LEVEL0,4))
  1. I RECORD="" S Y=-1 QUIT ;-1 no transaction record
  1. I $P(RECORD4,"^",10)'="" S Y=-4 QUIT ;-4 cannot re-sign record
  1. S OLDUSER=+$P(RECORD4,"^",9)
  1. I OLDUSER=0 S $P(RECORD4,"^",9)=USERNUM
  1. I OLDUSER>0 S USERNUM=OLDUSER
  1. S:$P(RECORD4,"^",13)="" $P(RECORD4,"^",13)=$$NOW^PRCUESIG
  1. S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD4))
  1. S $P(RECORD4,"^",10)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
  1. S $P(RECORD4,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
  1. S ^PRCS(410,LEVEL0,4)=RECORD4
  1. S Y=1 QUIT
  1. RECODE(LEVEL0,Y) ;Recode esig for ver 1 only
  1. N RECORD,RECORD4,SIGBLOCK,USERNUM
  1. S RECORD=$G(^PRCS(410,LEVEL0,0))
  1. S RECORD4=$G(^PRCS(410,LEVEL0,4))
  1. I RECORD="" S Y=-1 Q ;-1 no record
  1. S USERNUM=+$P(RECORD4,"^",9)
  1. I $P(RECORD4,U,10)=""!(USERNUM=0) S Y=-4 Q ;can't recode
  1. S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
  1. S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD4))
  1. S $P(RECORD4,"^",10)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
  1. S $P(RECORD4,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
  1. S ^PRCS(410,LEVEL0,4)=RECORD4
  1. S Y=1 QUIT
  1. REMOVE(LEVEL0) ;Entry point to remove esig from record
  1. ;NOT an extrinsic function
  1. NEW RECORD4,I
  1. S RECORD4=$G(^PRCS(410,LEVEL0,4))
  1. F I=9,10,12,13 S $P(RECORD4,"^",I)=""
  1. S ^PRCS(410,LEVEL0,4)=RECORD4
  1. QUIT
  1. VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
  1. NEW RECORD4,VERSION,SIGBLOCK
  1. ;get record variables
  1. S RECORD4=$G(^PRCS(410,LEVEL0,4))
  1. S VERSION=$P(RECORD4,"^",11),SIGBLOCK=$P(RECORD4,"^",12)
  1. I VERSION_SIGBLOCK="" QUIT 1
  1. QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
  1. STRING(X,X4) ;Build String of critical fields
  1. NEW RECORD,RECORD4,SIGBLOCK,CHECKSUM,OLDUSER
  1. Q $P(X,"^",1)_"^"_$P(X4,"^",3)_"^"_$P(X4,"^",4)_"^"_$P(X4,"^",5)_"^"_$P(X4,"^",13)