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Routine: PRCHES5

PRCHES5.m

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  1. PRCHES5 ;WISC/RHD/AKS-ESIG MAINTENANCE ROUTINE ;9/23/94 10:47 AM
  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 16.5 (ELECTRONIC SIGNATURE), FILE 442
  1. DECODE(LEVEL0) ;return esig in readable form
  1. ;returns "" if unsuccessful
  1. NEW RECORD,RECORD1,RECORD12,VERSION,PERSON,SIG,CHECKSUM
  1. S RECORD=$G(^PRC(442,LEVEL0,0)) I RECORD="" Q ""
  1. S RECORD1=$G(^PRC(442,LEVEL0,1))
  1. S RECORD12=$G(^PRC(442,LEVEL0,12))
  1. S VERSION=$P(RECORD12,"^",11)
  1. S PERSON=+$P(RECORD1,"^",10)
  1. I VERSION'="",VERSION'=1 Q ""
  1. S SIG=$P(RECORD12,"^",2)
  1. D1 ;esig for ver 1
  1. S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD12))
  1. Q $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
  1. ENCODE(LEVEL0,USERNUM,Y) ;Encode esig for ver 1 only
  1. NEW RECORD,RECORD1,RECORD12,SIGBLOCK,CHECKSUM,OLDUSER
  1. S USERNUM=+USERNUM
  1. I USERNUM=0 S Y=-3 Q ;-3 no user number
  1. S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
  1. I SIGBLOCK="" S Y=-2 Q ;-2 no sig block
  1. S RECORD=$G(^PRC(442,LEVEL0,0))
  1. S RECORD1=$G(^PRC(442,LEVEL0,1))
  1. S RECORD12=$G(^PRC(442,LEVEL0,12))
  1. I RECORD="" S Y=-1 Q ;-1 no record
  1. I $P(RECORD12,"^",2)'="" S Y=-4 Q ;-4 cannot re-sign record
  1. S OLDUSER=+$P(RECORD1,"^",10)
  1. I OLDUSER=0 S $P(RECORD1,"^",10)=USERNUM
  1. I OLDUSER>0 S USERNUM=OLDUSER
  1. S:$P(RECORD12,"^",3)="" $P(RECORD12,"^",3)=$$NOW^PRCUESIG
  1. S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD12))
  1. S $P(RECORD12,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
  1. S $P(RECORD12,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
  1. S ^PRC(442,LEVEL0,1)=RECORD1
  1. S ^PRC(442,LEVEL0,12)=RECORD12
  1. S Y=1 Q
  1. RECODE(LEVEL0,CHECKSUM,Y) ;Recode esig for ver 1 only
  1. NEW RECORD,RECORD1,RECORD12,SIGBLOCK,USERNUM
  1. S RECORD=$G(^PRC(442,LEVEL0,0))
  1. S RECORD1=$G(^PRC(442,LEVEL0,1))
  1. S RECORD12=$G(^PRC(442,LEVEL0,12))
  1. I RECORD="" S Y=-1 Q ;-1 no record
  1. S USERNUM=+$P(RECORD1,"^",10)
  1. I $P(RECORD12,"^",2)=""!(USERNUM=0) S Y=-4 Q ;can't recode
  1. ;S SIGBLOCK=$$DECODE^PRCUESIG($P(RECORD12,"^",2),USERNUM,CHECKSUM)
  1. S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
  1. S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD12))
  1. S $P(RECORD12,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
  1. S $P(RECORD12,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
  1. S ^PRC(442,LEVEL0,12)=RECORD12
  1. S Y=1 Q
  1. REMOVE(LEVEL0) ;Entry point to remove esig
  1. NEW I,RECORD1,RECORD12
  1. S RECORD1=$G(^PRC(442,LEVEL0,1))
  1. S RECORD12=$G(^PRC(442,LEVEL0,12))
  1. F I=2,3,12 S $P(RECORD12,"^",I)=""
  1. S ^PRC(442,LEVEL0,1)=RECORD1
  1. S ^PRC(442,LEVEL0,12)=RECORD12
  1. Q
  1. VERIFY(LEVEL0) ;verify ver 1 esig Returns 1 if valid
  1. NEW RECORD,RECORD1,RECORD12,VERSION,SIGBLOCK
  1. S RECORD12=$G(^PRC(442,LEVEL0,12))
  1. S VERSION=$P(RECORD12,"^",11),SIGBLOCK=$P(RECORD12,"^",12)
  1. I VERSION_SIGBLOCK="" Q 1
  1. Q ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
  1. STRING(X,X1,X12) ;Build String of critical fields
  1. Q $P(X,"^")_"^"_$P(X1,"^",15)_"^"_$P(X,"^",3)_"^"_$P(X,"^",7)_"^"_$P(X,"^",9)_"^"_$P(X1,"^",1)_"^"_$P(X,"^",11)_"^"_$P(X,"^",13)_"^"_$P(X12,"^",3)