- PRCBES1 ;WISC@ALTOONA/CTB-ESIG MAINTENANCE ROUTINE ;1/15/95 12:28
- V ;;5.1;IFCAP;;Oct 20, 2000
- ;Per VHA Directive 10-93-142, this routine should not be modified.
- ;ROUTINE FOR MAINTAINING FIELD 12.5 (ELECTRONIC SIGNATURE), FILE 421
- DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
- ;returns "" if unsuccessful
- NEW RECORD,RECORD4,VERSION,PERSON,SIG,CHECKSUM
- ;get record and check version
- S RECORD=$G(^PRCF(421,LEVEL0,0)) I RECORD="" QUIT ""
- S RECORD4=$G(^PRCF(421,LEVEL0,4))
- S VERSION=$P(RECORD4,"^",11)
- S PERSON=+$P(RECORD,"^",11)
- I VERSION'="",VERSION'=1 Q ""
- S SIG=$P(RECORD,"^",17)
- I VERSION=1 G D1
- D ;decode e signature less than version 1
- S X=$$DECODE^PRCUESIG(SIG,LEVEL0,PERSON)
- QUIT X
- D1 ;decode e signature for version 1
- S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD4))
- QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
- ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
- ;Parameter passing entry point
- NEW RECORD,RECORD4,SIGBLOCK,CHECKSUM,OLDUSER
- ;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=$G(^PRCF(421,LEVEL0,0))
- S RECORD4=$G(^PRCF(421,LEVEL0,4))
- I RECORD="" S Y=-1 QUIT ;-1 no 2237 record
- I $P(RECORD,"^",17)'="" S Y=-4 QUIT ;-4 cannot re-sign record
- S OLDUSER=+$P(RECORD,"^",11)
- I OLDUSER=0 S $P(RECORD,"^",11)=USERNUM
- I OLDUSER>0 S USERNUM=OLDUSER
- S:$P(RECORD4,"^",13)="" $P(RECORD4,"^",13)=$$NOW^PRCUESIG
- S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD4))
- S $P(RECORD,"^",17)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
- S $P(RECORD4,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
- S ^PRCF(421,LEVEL0,0)=RECORD
- S ^PRCF(421,LEVEL0,4)=RECORD4
- S Y=1 QUIT
- REMOVE(LEVEL0) ;Entry point to remove e signature from record
- ;NOT an extrinsic function
- NEW I,RECORD,RECORD4
- S RECORD4=$G(^PRCF(421,LEVEL0,4))
- S RECORD=$G(^PRCF(421,LEVEL0,0))
- F I=11,17 S $P(RECORD,"^",I)=""
- S $P(RECORD4,"^",12,13)="^"
- S ^PRCF(421,LEVEL0,1)=RECORD1
- S ^PRCF(421,LEVEL0,4)=RECORD4
- QUIT
- VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
- NEW RECORD,RECORD4,VERSION,SIGBLOCK
- ;get record variables
- S RECORD=$G(^PRCF(421,LEVEL0,0))
- S RECORD4=$G(^PRCF(421,LEVEL0,4))
- S VERSION=$P(RECORD4,"^",11),SIGBLOCK=$P(RECORD4,"^",12)
- I VERSION_SIGBLOCK="" QUIT 1
- QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
- STRING(X,X4) ;Build String of critical fields
- Q $P(X,"^",1,2)_"^"_$P(X,"^",4,10)_$P(X,"^",18)_"^"_$P(X4,"^",13)
- --- Routine Detail --- with STRUCTURED ROUTINE LISTING ---[H[J[2J[HPRCBES1 2682 printed Feb 18, 2025@23:27:03 Page 2
- PRCBES1 ;WISC@ALTOONA/CTB-ESIG MAINTENANCE ROUTINE ;1/15/95 12:28
- V ;;5.1;IFCAP;;Oct 20, 2000
- +1 ;Per VHA Directive 10-93-142, this routine should not be modified.
- +2 ;ROUTINE FOR MAINTAINING FIELD 12.5 (ELECTRONIC SIGNATURE), FILE 421
- DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
- +1 ;returns "" if unsuccessful
- +2 NEW RECORD,RECORD4,VERSION,PERSON,SIG,CHECKSUM
- +3 ;get record and check version
- +4 SET RECORD=$GET(^PRCF(421,LEVEL0,0))
- IF RECORD=""
- QUIT ""
- +5 SET RECORD4=$GET(^PRCF(421,LEVEL0,4))
- +6 SET VERSION=$PIECE(RECORD4,"^",11)
- +7 SET PERSON=+$PIECE(RECORD,"^",11)
- +8 IF VERSION'=""
- IF VERSION'=1
- QUIT ""
- +9 SET SIG=$PIECE(RECORD,"^",17)
- +10 IF VERSION=1
- GOTO D1
- D ;decode e signature less than version 1
- +1 SET X=$$DECODE^PRCUESIG(SIG,LEVEL0,PERSON)
- +2 QUIT X
- D1 ;decode e signature for version 1
- +1 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD4))
- +2 QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
- ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
- +1 ;Parameter passing entry point
- +2 NEW RECORD,RECORD4,SIGBLOCK,CHECKSUM,OLDUSER
- +3 ;get record
- +4 SET USERNUM=+USERNUM
- +5 ;-3 no user num available
- IF USERNUM=0
- SET Y=-3
- QUIT
- +6 SET SIGBLOCK=$PIECE($GET(^VA(200,USERNUM,20)),"^",2)
- +7 ;-2 no sigblock in file 200
- IF SIGBLOCK=""
- SET Y=-2
- QUIT
- +8 SET RECORD=$GET(^PRCF(421,LEVEL0,0))
- +9 SET RECORD4=$GET(^PRCF(421,LEVEL0,4))
- +10 ;-1 no 2237 record
- IF RECORD=""
- SET Y=-1
- QUIT
- +11 ;-4 cannot re-sign record
- IF $PIECE(RECORD,"^",17)'=""
- SET Y=-4
- QUIT
- +12 SET OLDUSER=+$PIECE(RECORD,"^",11)
- +13 IF OLDUSER=0
- SET $PIECE(RECORD,"^",11)=USERNUM
- +14 IF OLDUSER>0
- SET USERNUM=OLDUSER
- +15 if $PIECE(RECORD4,"^",13)=""
- SET $PIECE(RECORD4,"^",13)=$$NOW^PRCUESIG
- +16 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD4))
- +17 SET $PIECE(RECORD,"^",17)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
- +18 SET $PIECE(RECORD4,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
- +19 SET ^PRCF(421,LEVEL0,0)=RECORD
- +20 SET ^PRCF(421,LEVEL0,4)=RECORD4
- +21 SET Y=1
- QUIT
- REMOVE(LEVEL0) ;Entry point to remove e signature from record
- +1 ;NOT an extrinsic function
- +2 NEW I,RECORD,RECORD4
- +3 SET RECORD4=$GET(^PRCF(421,LEVEL0,4))
- +4 SET RECORD=$GET(^PRCF(421,LEVEL0,0))
- +5 FOR I=11,17
- SET $PIECE(RECORD,"^",I)=""
- +6 SET $PIECE(RECORD4,"^",12,13)="^"
- +7 SET ^PRCF(421,LEVEL0,1)=RECORD1
- +8 SET ^PRCF(421,LEVEL0,4)=RECORD4
- +9 QUIT
- VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
- +1 NEW RECORD,RECORD4,VERSION,SIGBLOCK
- +2 ;get record variables
- +3 SET RECORD=$GET(^PRCF(421,LEVEL0,0))
- +4 SET RECORD4=$GET(^PRCF(421,LEVEL0,4))
- +5 SET VERSION=$PIECE(RECORD4,"^",11)
- SET SIGBLOCK=$PIECE(RECORD4,"^",12)
- +6 IF VERSION_SIGBLOCK=""
- QUIT 1
- +7 QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
- STRING(X,X4) ;Build String of critical fields
- +1 QUIT $PIECE(X,"^",1,2)_"^"_$PIECE(X,"^",4,10)_$PIECE(X,"^",18)_"^"_$PIECE(X4,"^",13)