- PRCHES12 ;WISC/RHD/AKS-ESIG MAINTENANCE ROUTINE ;9/23/94 10:49 AM
- V ;;5.1;IFCAP;;Oct 20, 2000
- ;Per VHA Directive 10-93-142, this routine should not be modified.
- ;ROUTINE FOR MAINTAINING FIELD 16.5 (ELECTRONIC SIGNATURE), FILE 443.6
- DECODE(LEVEL0) ;Extrinsic Function to return hashed esig to readable form.
- ;returns "" if unsuccessful
- NEW RECORD,RECORD1,RECORD12,VERSION,PERSON,SIG,CHECKSUM
- S RECORD=$G(^PRC(443.6,LEVEL0,0)) I RECORD="" Q ""
- S RECORD1=$G(^PRC(443.6,LEVEL0,1))
- S RECORD12=$G(^PRC(443.6,LEVEL0,12))
- S VERSION=$P(RECORD12,"^",11)
- S PERSON=+$P(RECORD1,"^",10)
- I VERSION'="",VERSION'=1 Q ""
- S SIG=$P(RECORD12,"^",2)
- D1 ;decode e signature for version 1
- S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD12))
- Q $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
- ENCODE(LEVEL0,USERNUM,Y) ;Encode esig for version 1 only
- S Y=-4 Q ;-4 cannot encode record
- ;
- RECODE(LEVEL0,CHECKSUM,Y) ;Recode esig for version 1 only
- NEW RECORD,RECORD1,RECORD12,SIGBLOCK,USERNUM
- S RECORD=$G(^PRC(443.6,LEVEL0,0))
- S RECORD1=$G(^PRC(443.6,LEVEL0,1))
- S RECORD12=$G(^PRC(443.6,LEVEL0,12))
- I RECORD="" S Y=-1 Q ;-1 no record
- S USERNUM=+$P(RECORD1,"^",10)
- I $P(RECORD12,"^",2)=""!(USERNUM=0)!'CHECKSUM S Y=-4 Q ;-4 cannot recode record
- ;S SIGBLOCK=$$DECODE^PRCUESIG($P(RECORD12,"^",2),USERNUM,CHECKSUM)
- S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
- S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD12))
- S $P(RECORD12,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
- S $P(RECORD12,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
- S ^PRC(443.6,LEVEL0,12)=RECORD12
- S Y=1 Q
- REMOVE(LEVEL0) ;Entry point to remove esig from record
- NEW I,RECORD1,RECORD12
- S RECORD1=$G(^PRC(443.6,LEVEL0,1))
- S RECORD12=$G(^PRC(443.6,LEVEL0,12))
- F I=2,3,12 S $P(RECORD12,"^",I)=""
- S ^PRC(443.6,LEVEL0,1)=RECORD1
- S ^PRC(443.6,LEVEL0,12)=RECORD12
- Q
- VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
- NEW RECORD,RECORD1,RECORD12,VERSION,SIGBLOCK
- S RECORD12=$G(^PRC(443.6,LEVEL0,12))
- S VERSION=$P(RECORD12,"^",11),SIGBLOCK=$P(RECORD12,"^",12)
- I VERSION_SIGBLOCK="" Q 1
- Q ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
- STRING(X,X1,X12) ;Build String of critical fields
- Q $P(X,"^")_"^"_$P(X1,"^",15)_"^"_$P(X,"^",3)_"^"_$P(X,"^",7)_"^"_$P(X,"^",9)_"^"_$P(X1,"^",1)_"^"_$P(X,"^",11)_"^"_$P(X,"^",13)_"^"_$P(X12,"^",3)
- --- Routine Detail --- with STRUCTURED ROUTINE LISTING ---[H[J[2J[HPRCHES12 2445 printed Mar 13, 2025@21:12:06 Page 2
- PRCHES12 ;WISC/RHD/AKS-ESIG MAINTENANCE ROUTINE ;9/23/94 10:49 AM
- V ;;5.1;IFCAP;;Oct 20, 2000
- +1 ;Per VHA Directive 10-93-142, this routine should not be modified.
- +2 ;ROUTINE FOR MAINTAINING FIELD 16.5 (ELECTRONIC SIGNATURE), FILE 443.6
- DECODE(LEVEL0) ;Extrinsic Function to return hashed esig to readable form.
- +1 ;returns "" if unsuccessful
- +2 NEW RECORD,RECORD1,RECORD12,VERSION,PERSON,SIG,CHECKSUM
- +3 SET RECORD=$GET(^PRC(443.6,LEVEL0,0))
- IF RECORD=""
- QUIT ""
- +4 SET RECORD1=$GET(^PRC(443.6,LEVEL0,1))
- +5 SET RECORD12=$GET(^PRC(443.6,LEVEL0,12))
- +6 SET VERSION=$PIECE(RECORD12,"^",11)
- +7 SET PERSON=+$PIECE(RECORD1,"^",10)
- +8 IF VERSION'=""
- IF VERSION'=1
- QUIT ""
- +9 SET SIG=$PIECE(RECORD12,"^",2)
- D1 ;decode e signature for version 1
- +1 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD12))
- +2 QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
- ENCODE(LEVEL0,USERNUM,Y) ;Encode esig for version 1 only
- +1 ;-4 cannot encode record
- SET Y=-4
- QUIT
- +2 ;
- RECODE(LEVEL0,CHECKSUM,Y) ;Recode esig for version 1 only
- +1 NEW RECORD,RECORD1,RECORD12,SIGBLOCK,USERNUM
- +2 SET RECORD=$GET(^PRC(443.6,LEVEL0,0))
- +3 SET RECORD1=$GET(^PRC(443.6,LEVEL0,1))
- +4 SET RECORD12=$GET(^PRC(443.6,LEVEL0,12))
- +5 ;-1 no record
- IF RECORD=""
- SET Y=-1
- QUIT
- +6 SET USERNUM=+$PIECE(RECORD1,"^",10)
- +7 ;-4 cannot recode record
- IF $PIECE(RECORD12,"^",2)=""!(USERNUM=0)!'CHECKSUM
- SET Y=-4
- QUIT
- +8 ;S SIGBLOCK=$$DECODE^PRCUESIG($P(RECORD12,"^",2),USERNUM,CHECKSUM)
- +9 SET SIGBLOCK=$PIECE($GET(^VA(200,USERNUM,20)),"^",2)
- +10 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD12))
- +11 SET $PIECE(RECORD12,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
- +12 SET $PIECE(RECORD12,"^",11,12)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
- +13 SET ^PRC(443.6,LEVEL0,12)=RECORD12
- +14 SET Y=1
- QUIT
- REMOVE(LEVEL0) ;Entry point to remove esig from record
- +1 NEW I,RECORD1,RECORD12
- +2 SET RECORD1=$GET(^PRC(443.6,LEVEL0,1))
- +3 SET RECORD12=$GET(^PRC(443.6,LEVEL0,12))
- +4 FOR I=2,3,12
- SET $PIECE(RECORD12,"^",I)=""
- +5 SET ^PRC(443.6,LEVEL0,1)=RECORD1
- +6 SET ^PRC(443.6,LEVEL0,12)=RECORD12
- +7 QUIT
- VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
- +1 NEW RECORD,RECORD1,RECORD12,VERSION,SIGBLOCK
- +2 SET RECORD12=$GET(^PRC(443.6,LEVEL0,12))
- +3 SET VERSION=$PIECE(RECORD12,"^",11)
- SET SIGBLOCK=$PIECE(RECORD12,"^",12)
- +4 IF VERSION_SIGBLOCK=""
- QUIT 1
- +5 QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
- STRING(X,X1,X12) ;Build String of critical fields
- +1 QUIT $PIECE(X,"^")_"^"_$PIECE(X1,"^",15)_"^"_$PIECE(X,"^",3)_"^"_$PIECE(X,"^",7)_"^"_$PIECE(X,"^",9)_"^"_$PIECE(X1,"^",1)_"^"_$PIECE(X,"^",11)_"^"_$PIECE(X,"^",13)_"^"_$PIECE(X12,"^",3)
