- PRCFDES2 ;WISC/LEM-ESIG MAINTENANCE ROUTINE ;1/19/93 1:05 PM
- V ;;5.1;IFCAP;;Oct 20, 2000
- ;Per VHA Directive 10-93-142, this routine should not be modified.
- ;ROUTINE FOR MAINTAINING FIELD 62 (COMPLETED BY ELEC SIG), FILE 421.5
- DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
- ;returns "" if unsuccessful
- NEW RECORD2,RECORD21,VERSION,PERSON,SIG,CHECKSUM
- ;get record and check version
- S RECORD2=$G(^PRCF(421.5,LEVEL0,2)) I RECORD2="" QUIT ""
- S RECORD21=$G(^PRCF(421.5,LEVEL0,2.1))
- S VERSION=$P(RECORD21,"^",3)
- S PERSON=+$P(RECORD2,"^",11)
- I VERSION'="",VERSION'=1 Q ""
- S SIG=$P(RECORD2,"^",13)
- D1 ;decode e signature for version 1
- S RECORD=$G(^PRCF(421.5,LEVEL0,0))
- S RECORD1=$G(^PRCF(421.5,LEVEL0,1))
- S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1))
- QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
- ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
- ;Parameter passing entry point
- NEW SIGBLOCK,CHECKSUM,OLDUSER
- NEW RECORD,RECORD1,RECORD2,RECORD21
- ;get record
- S USERNUM=+USERNUM
- I USERNUM=0 S Y=-3 QUIT ;-3 no user num available
- S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
- I SIGBLOCK="" S Y=-2 QUIT ;-2 no sigblock in file 200
- S RECORD=$G(^PRCF(421.5,LEVEL0,0))
- S RECORD1=$G(^PRCF(421.5,LEVEL0,1))
- S RECORD2=$G(^PRCF(421.5,LEVEL0,2))
- S RECORD21=$G(^PRCF(421.5,LEVEL0,2.1))
- I RECORD="" S Y=-1 QUIT ;-1 no transaction record
- I $P(RECORD2,"^",13)'="" S Y=-4 QUIT ;-4 cannot re-sign record
- S OLDUSER=+$P(RECORD2,"^",11)
- I OLDUSER=0 S $P(RECORD2,"^",11)=USERNUM
- I OLDUSER>0 S USERNUM=OLDUSER
- S:$P(RECORD21,"^",6)="" $P(RECORD21,"^",6)=$$NOW^PRCUESIG
- S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1))
- S $P(RECORD2,"^",13)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
- S $P(RECORD21,"^",3,4)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
- S ^PRCF(421.5,LEVEL0,2)=RECORD2
- S ^PRCF(421.5,LEVEL0,2.1)=RECORD21
- S Y=1 QUIT
- REMOVE(LEVEL0) ;Entry point to remove e signature from record
- ;NOT an extrinsic function
- NEW RECORD2,RECORD21,I
- S RECORD2=$G(^PRCF(421.5,LEVEL0,2))
- S RECORD21=$G(^PRCF(421.5,LEVEL0,2.1))
- F I=11,13 S $P(RECORD2,"^",I)=""
- F I=4,6 S $P(RECORD21,"^",I)=""
- S ^PRCF(421.5,LEVEL0,2)=RECORD2
- S ^PRCF(421.5,LEVEL0,2.1)=RECORD21
- QUIT
- VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
- NEW RECORD21,VERSION,SIGBLOCK
- ;get record variables
- S RECORD21=$G(^PRCF(421.5,LEVEL0,2.1))
- S VERSION=$P(RECORD21,"^",3),SIGBLOCK=$P(RECORD21,"^",4)
- I VERSION_SIGBLOCK="" QUIT 1
- QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
- STRING(X,X1) ;Build String of critical fields
- NEW RECORD,RECORD1
- Q $P(X,"^",1)_"^"_$P(X,"^",3)_"^"_$P(X,"^",4)_"^"_$P(X,"^",8)_"^"_$P(X,"^",15)_"^"_$P(X1,"^",3)
- --- Routine Detail --- with STRUCTURED ROUTINE LISTING ---[H[J[2J[HPRCFDES2 2813 printed Feb 18, 2025@23:29:23 Page 2
- PRCFDES2 ;WISC/LEM-ESIG MAINTENANCE ROUTINE ;1/19/93 1:05 PM
- V ;;5.1;IFCAP;;Oct 20, 2000
- +1 ;Per VHA Directive 10-93-142, this routine should not be modified.
- +2 ;ROUTINE FOR MAINTAINING FIELD 62 (COMPLETED BY ELEC SIG), FILE 421.5
- DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
- +1 ;returns "" if unsuccessful
- +2 NEW RECORD2,RECORD21,VERSION,PERSON,SIG,CHECKSUM
- +3 ;get record and check version
- +4 SET RECORD2=$GET(^PRCF(421.5,LEVEL0,2))
- IF RECORD2=""
- QUIT ""
- +5 SET RECORD21=$GET(^PRCF(421.5,LEVEL0,2.1))
- +6 SET VERSION=$PIECE(RECORD21,"^",3)
- +7 SET PERSON=+$PIECE(RECORD2,"^",11)
- +8 IF VERSION'=""
- IF VERSION'=1
- QUIT ""
- +9 SET SIG=$PIECE(RECORD2,"^",13)
- D1 ;decode e signature for version 1
- +1 SET RECORD=$GET(^PRCF(421.5,LEVEL0,0))
- +2 SET RECORD1=$GET(^PRCF(421.5,LEVEL0,1))
- +3 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1))
- +4 QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
- ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
- +1 ;Parameter passing entry point
- +2 NEW SIGBLOCK,CHECKSUM,OLDUSER
- +3 NEW RECORD,RECORD1,RECORD2,RECORD21
- +4 ;get record
- +5 SET USERNUM=+USERNUM
- +6 ;-3 no user num available
- IF USERNUM=0
- SET Y=-3
- QUIT
- +7 SET SIGBLOCK=$PIECE($GET(^VA(200,USERNUM,20)),"^",2)
- +8 ;-2 no sigblock in file 200
- IF SIGBLOCK=""
- SET Y=-2
- QUIT
- +9 SET RECORD=$GET(^PRCF(421.5,LEVEL0,0))
- +10 SET RECORD1=$GET(^PRCF(421.5,LEVEL0,1))
- +11 SET RECORD2=$GET(^PRCF(421.5,LEVEL0,2))
- +12 SET RECORD21=$GET(^PRCF(421.5,LEVEL0,2.1))
- +13 ;-1 no transaction record
- IF RECORD=""
- SET Y=-1
- QUIT
- +14 ;-4 cannot re-sign record
- IF $PIECE(RECORD2,"^",13)'=""
- SET Y=-4
- QUIT
- +15 SET OLDUSER=+$PIECE(RECORD2,"^",11)
- +16 IF OLDUSER=0
- SET $PIECE(RECORD2,"^",11)=USERNUM
- +17 IF OLDUSER>0
- SET USERNUM=OLDUSER
- +18 if $PIECE(RECORD21,"^",6)=""
- SET $PIECE(RECORD21,"^",6)=$$NOW^PRCUESIG
- +19 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1))
- +20 SET $PIECE(RECORD2,"^",13)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
- +21 SET $PIECE(RECORD21,"^",3,4)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
- +22 SET ^PRCF(421.5,LEVEL0,2)=RECORD2
- +23 SET ^PRCF(421.5,LEVEL0,2.1)=RECORD21
- +24 SET Y=1
- QUIT
- REMOVE(LEVEL0) ;Entry point to remove e signature from record
- +1 ;NOT an extrinsic function
- +2 NEW RECORD2,RECORD21,I
- +3 SET RECORD2=$GET(^PRCF(421.5,LEVEL0,2))
- +4 SET RECORD21=$GET(^PRCF(421.5,LEVEL0,2.1))
- +5 FOR I=11,13
- SET $PIECE(RECORD2,"^",I)=""
- +6 FOR I=4,6
- SET $PIECE(RECORD21,"^",I)=""
- +7 SET ^PRCF(421.5,LEVEL0,2)=RECORD2
- +8 SET ^PRCF(421.5,LEVEL0,2.1)=RECORD21
- +9 QUIT
- VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
- +1 NEW RECORD21,VERSION,SIGBLOCK
- +2 ;get record variables
- +3 SET RECORD21=$GET(^PRCF(421.5,LEVEL0,2.1))
- +4 SET VERSION=$PIECE(RECORD21,"^",3)
- SET SIGBLOCK=$PIECE(RECORD21,"^",4)
- +5 IF VERSION_SIGBLOCK=""
- QUIT 1
- +6 QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
- STRING(X,X1) ;Build String of critical fields
- +1 NEW RECORD,RECORD1
- +2 QUIT $PIECE(X,"^",1)_"^"_$PIECE(X,"^",3)_"^"_$PIECE(X,"^",4)_"^"_$PIECE(X,"^",8)_"^"_$PIECE(X,"^",15)_"^"_$PIECE(X1,"^",3)