Home   Package List   Routine Alphabetical List   Global Alphabetical List   FileMan Files List   FileMan Sub-Files List   Package Component Lists   Package-Namespace Mapping  
Routine: PRCBES1

PRCBES1.m

Go to the documentation of this file.
  1. PRCBES1 ;WISC@ALTOONA/CTB-ESIG MAINTENANCE ROUTINE ;1/15/95 12:28
  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 12.5 (ELECTRONIC SIGNATURE), FILE 421
  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=$G(^PRCF(421,LEVEL0,0)) I RECORD="" QUIT ""
  1. S RECORD4=$G(^PRCF(421,LEVEL0,4))
  1. S VERSION=$P(RECORD4,"^",11)
  1. S PERSON=+$P(RECORD,"^",11)
  1. I VERSION'="",VERSION'=1 Q ""
  1. S SIG=$P(RECORD,"^",17)
  1. I VERSION=1 G D1
  1. D ;decode e signature less than version 1
  1. S X=$$DECODE^PRCUESIG(SIG,LEVEL0,PERSON)
  1. QUIT X
  1. D1 ;decode e signature for version 1
  1. S CHECKSUM=$$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=$G(^PRCF(421,LEVEL0,0))
  1. S RECORD4=$G(^PRCF(421,LEVEL0,4))
  1. I RECORD="" S Y=-1 QUIT ;-1 no 2237 record
  1. I $P(RECORD,"^",17)'="" S Y=-4 QUIT ;-4 cannot re-sign record
  1. S OLDUSER=+$P(RECORD,"^",11)
  1. I OLDUSER=0 S $P(RECORD,"^",11)=USERNUM
  1. I OLDUSER>0 S USERNUM=OLDUSER
  1. S:$P(RECORD4,"^",13)="" $P(RECORD4,"^",13)=$$NOW^PRCUESIG
  1. S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD4))
  1. S $P(RECORD,"^",17)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
  1. S $P(RECORD4,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
  1. S ^PRCF(421,LEVEL0,0)=RECORD
  1. S ^PRCF(421,LEVEL0,4)=RECORD4
  1. S Y=1 QUIT
  1. REMOVE(LEVEL0) ;Entry point to remove e signature from record
  1. ;NOT an extrinsic function
  1. NEW I,RECORD,RECORD4
  1. S RECORD4=$G(^PRCF(421,LEVEL0,4))
  1. S RECORD=$G(^PRCF(421,LEVEL0,0))
  1. F I=11,17 S $P(RECORD,"^",I)=""
  1. S $P(RECORD4,"^",12,13)="^"
  1. S ^PRCF(421,LEVEL0,1)=RECORD1
  1. S ^PRCF(421,LEVEL0,4)=RECORD4
  1. QUIT
  1. VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
  1. NEW RECORD,RECORD4,VERSION,SIGBLOCK
  1. ;get record variables
  1. S RECORD=$G(^PRCF(421,LEVEL0,0))
  1. S RECORD4=$G(^PRCF(421,LEVEL0,4))
  1. S VERSION=$P(RECORD4,"^",11),SIGBLOCK=$P(RECORD4,"^",12)
  1. I VERSION_SIGBLOCK="" QUIT 1
  1. QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
  1. STRING(X,X4) ;Build String of critical fields
  1. Q $P(X,"^",1,2)_"^"_$P(X,"^",4,10)_$P(X,"^",18)_"^"_$P(X4,"^",13)