- PRCFES1 ;WISC@ALTOONA/CTB/PLT-ESIG MAINTENANCE ROUTINE ;5/20/93 9:35 AM
- V ;;5.1;IFCAP;;Oct 20, 2000
- ;Per VHA Directive 10-93-142, this routine should not be modified.
- ;ROUTINE FOR MAINTAINING FIELD 999.3 (ELECTRONIC SIGNATURE), FILE 423
- DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
- ;returns "" if unsuccessful
- NEW RECORD,RECORD8,RECORD81,RECCODE,VERSION,PERSON,SIG,CHECKSUM
- ;get record and check version
- S RECORD=$G(^PRCF(423,LEVEL0,0)) I RECORD="" QUIT ""
- S RECORD8=$G(^PRCF(423,LEVEL0,8))
- S RECORD81=$G(^PRCF(423,LEVEL0,8.1))
- S RECCODE=$G(^PRCF(423,LEVEL0,"CODE"))
- S VERSION=$P(RECORD81,"^",1)
- S PERSON=+$P(RECORD,"^",8)
- I VERSION'="",VERSION'=1 Q ""
- S SIG=$P(RECORD8,"^",16)
- D1 ;decode e signature for version 1
- S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECCODE,RECORD81))
- QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
- ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
- ;Parameter passing entry point
- NEW RECORD,RECORDE8,RECORD81,RECCODE,SIGBLOCK,CHECKSUM,OLDUSER
- ;get record
- S USERNUM=+USERNUM
- I USERNUM=0 S Y=-3 QUIT ;-3 no user num available
- S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
- I SIGBLOCK="" S Y=-2 QUIT ;-2 no sigblock in file 200
- S RECORD=$G(^PRCF(423,LEVEL0,0))
- S RECORD8=$G(^PRCF(423,LEVEL0,8))
- S RECORD81=$G(^PRCF(423,LEVEL0,8.1))
- S RECCODE=$G(^PRCF(423,LEVEL0,"CODE"))
- I RECORD="" S Y=-1 QUIT ;-1 no 2237 record
- I $P(RECORD8,"^",16)'="" S Y=-4 QUIT ;-4 cannot re-sign record
- S OLDUSER=+$P(RECORD,"^",8)
- I OLDUSER=0 S $P(RECORD,"^",8)=USERNUM
- I OLDUSER>0 S USERNUM=OLDUSER
- S:$P(RECORD81,"^",2)="" $P(RECORD81,"^",2)=$$NOW^PRCUESIG
- S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECCODE,RECORD81))
- S $P(RECORD8,"^",16)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
- S $P(RECORD81,"^",1)=1,$P(RECORD81,"^",3)=$$SUM^PRCUESIG(SIGBLOCK)
- S ^PRCF(423,LEVEL0,0)=RECORD
- S ^PRCF(423,LEVEL0,8)=RECORD8
- S ^PRCF(423,LEVEL0,8.1)=RECORD81
- S Y=1 QUIT
- REMOVE(LEVEL0) ;Entry point to remove e signature from record
- ;NOT an extrinsic function
- NEW I,RECORD8,RECORD81
- S RECORD=$G(^PRCF(423,LEVEL0,0))
- S RECORD8=$G(^PRCF(423,LEVEL0,8))
- S RECORD81=$G(^PRCF(423,LEVEL0,8.1))
- S $P(RECORD,"^",8)=""
- S $P(RECORD8,"^",16)=""
- S $P(RECORD81,"^",2,3)="^"
- S ^PRCF(423,LEVEL0,0)=RECORD
- S ^PRCF(423,LEVEL0,8)=RECORD8
- S ^PRCF(423,LEVEL0,8.1)=RECORD81
- QUIT
- VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
- NEW RECORD81,VERSION,SIGBLOCK
- ;get record variables
- S RECORD81=$G(^PRCF(423,LEVEL0,8.1))
- S VERSION=$P(RECORD81,"^",1),SIGBLOCK=$P(RECORD81,"^",3)
- I VERSION_SIGBLOCK="" QUIT 1
- QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
- STRING(X,X81) ;Build String of critical fields
- Q X_"^"_$P(X81,"^",2)
- --- Routine Detail --- with STRUCTURED ROUTINE LISTING ---[H[J[2J[HPRCFES1 2831 printed Jan 18, 2025@03:04:30 Page 2
- PRCFES1 ;WISC@ALTOONA/CTB/PLT-ESIG MAINTENANCE ROUTINE ;5/20/93 9:35 AM
- V ;;5.1;IFCAP;;Oct 20, 2000
- +1 ;Per VHA Directive 10-93-142, this routine should not be modified.
- +2 ;ROUTINE FOR MAINTAINING FIELD 999.3 (ELECTRONIC SIGNATURE), FILE 423
- DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
- +1 ;returns "" if unsuccessful
- +2 NEW RECORD,RECORD8,RECORD81,RECCODE,VERSION,PERSON,SIG,CHECKSUM
- +3 ;get record and check version
- +4 SET RECORD=$GET(^PRCF(423,LEVEL0,0))
- IF RECORD=""
- QUIT ""
- +5 SET RECORD8=$GET(^PRCF(423,LEVEL0,8))
- +6 SET RECORD81=$GET(^PRCF(423,LEVEL0,8.1))
- +7 SET RECCODE=$GET(^PRCF(423,LEVEL0,"CODE"))
- +8 SET VERSION=$PIECE(RECORD81,"^",1)
- +9 SET PERSON=+$PIECE(RECORD,"^",8)
- +10 IF VERSION'=""
- IF VERSION'=1
- QUIT ""
- +11 SET SIG=$PIECE(RECORD8,"^",16)
- D1 ;decode e signature for version 1
- +1 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECCODE,RECORD81))
- +2 QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
- ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
- +1 ;Parameter passing entry point
- +2 NEW RECORD,RECORDE8,RECORD81,RECCODE,SIGBLOCK,CHECKSUM,OLDUSER
- +3 ;get record
- +4 SET USERNUM=+USERNUM
- +5 ;-3 no user num available
- IF USERNUM=0
- SET Y=-3
- QUIT
- +6 SET SIGBLOCK=$PIECE($GET(^VA(200,USERNUM,20)),"^",2)
- +7 ;-2 no sigblock in file 200
- IF SIGBLOCK=""
- SET Y=-2
- QUIT
- +8 SET RECORD=$GET(^PRCF(423,LEVEL0,0))
- +9 SET RECORD8=$GET(^PRCF(423,LEVEL0,8))
- +10 SET RECORD81=$GET(^PRCF(423,LEVEL0,8.1))
- +11 SET RECCODE=$GET(^PRCF(423,LEVEL0,"CODE"))
- +12 ;-1 no 2237 record
- IF RECORD=""
- SET Y=-1
- QUIT
- +13 ;-4 cannot re-sign record
- IF $PIECE(RECORD8,"^",16)'=""
- SET Y=-4
- QUIT
- +14 SET OLDUSER=+$PIECE(RECORD,"^",8)
- +15 IF OLDUSER=0
- SET $PIECE(RECORD,"^",8)=USERNUM
- +16 IF OLDUSER>0
- SET USERNUM=OLDUSER
- +17 if $PIECE(RECORD81,"^",2)=""
- SET $PIECE(RECORD81,"^",2)=$$NOW^PRCUESIG
- +18 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECCODE,RECORD81))
- +19 SET $PIECE(RECORD8,"^",16)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
- +20 SET $PIECE(RECORD81,"^",1)=1
- SET $PIECE(RECORD81,"^",3)=$$SUM^PRCUESIG(SIGBLOCK)
- +21 SET ^PRCF(423,LEVEL0,0)=RECORD
- +22 SET ^PRCF(423,LEVEL0,8)=RECORD8
- +23 SET ^PRCF(423,LEVEL0,8.1)=RECORD81
- +24 SET Y=1
- QUIT
- REMOVE(LEVEL0) ;Entry point to remove e signature from record
- +1 ;NOT an extrinsic function
- +2 NEW I,RECORD8,RECORD81
- +3 SET RECORD=$GET(^PRCF(423,LEVEL0,0))
- +4 SET RECORD8=$GET(^PRCF(423,LEVEL0,8))
- +5 SET RECORD81=$GET(^PRCF(423,LEVEL0,8.1))
- +6 SET $PIECE(RECORD,"^",8)=""
- +7 SET $PIECE(RECORD8,"^",16)=""
- +8 SET $PIECE(RECORD81,"^",2,3)="^"
- +9 SET ^PRCF(423,LEVEL0,0)=RECORD
- +10 SET ^PRCF(423,LEVEL0,8)=RECORD8
- +11 SET ^PRCF(423,LEVEL0,8.1)=RECORD81
- +12 QUIT
- VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
- +1 NEW RECORD81,VERSION,SIGBLOCK
- +2 ;get record variables
- +3 SET RECORD81=$GET(^PRCF(423,LEVEL0,8.1))
- +4 SET VERSION=$PIECE(RECORD81,"^",1)
- SET SIGBLOCK=$PIECE(RECORD81,"^",3)
- +5 IF VERSION_SIGBLOCK=""
- QUIT 1
- +6 QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
- STRING(X,X81) ;Build String of critical fields
- +1 QUIT X_"^"_$PIECE(X81,"^",2)