PRCHES6 ;WISC/RHD/AKS-ESIG MAINTENANCE ROUTINE ;8/18/94 3:30 PM
V ;;5.1;IFCAP;;Oct 20, 2000
;Per VHA Directive 10-93-142, this routine should not be modified.
;ROUTINE FOR MAINTAINING SUBFIELD 7 (ELECTRONIC SIGNATURE)
; FIELD 50 (AMMENDMENT) FILE 442
DECODE(LEVEL0,LEVEL1) ;Extrinsic Function to return hashed electronic sig to readable form.
;returns "" if unsuccessful
NEW RECORD,RECORD1,VERSION,PERSON,SIG,CHECKSUM
S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0)) I RECORD="" Q ""
S RECORD1=$G(^PRC(442,LEVEL0,6,LEVEL1,1))
S VERSION=$P(RECORD,"^",9)
S PERSON=+$P(RECORD1,"^")
I VERSION'="",VERSION'=1 Q ""
S SIG=$P(RECORD1,"^",2)
D1 ;decode e signature for version 1
S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
Q $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
ENCODE(LEVEL0,LEVEL1,USERNUM,Y) ;Encode e signature for version 1 only
NEW RECORD,RECORD1,SIGBLOCK,CHECKSUM,OLDUSER
S USERNUM=+USERNUM
I USERNUM=0 S Y=-3 Q ;-3 no user number
S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
I SIGBLOCK="" S Y=-2 Q ;-2 no signature block
S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0))
S RECORD1=$G(^PRC(442,LEVEL0,6,LEVEL1,1))
I RECORD="" S Y=-1 Q ;-1 no 2237 record
I $P(RECORD1,"^",2)'="" S Y=-4 Q ;-4 cannot re-sign record
S OLDUSER=+$P(RECORD1,"^",1)
I OLDUSER=0 S $P(RECORD1,"^",1)=USERNUM
I OLDUSER>0 S USERNUM=OLDUSER
S:$P(RECORD1,"^",3)="" $P(RECORD1,"^",3)=$$NOW^PRCUESIG
S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
S $P(RECORD1,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
S $P(RECORD,"^",9,10)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
S ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
S ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
S Y=1 Q
RECODE(LEVEL0,LEVEL1,Y) ;Recode ESIG for version 1 only
N RECORD,RECORD1,SIGBLOCK,CHECKSUM,USERNUM
S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0))
S RECORD1=$G(^PRC(442,LEVEL0,6,LEVEL1,1))
I RECORD=""!(RECORD1="") S Y=-1 Q ;-1 no record
S USERNUM=+$P(RECORD1,"^")
I $P(RECORD1,"^",2)=""!(USERNUM=0) S Y=-4 Q ;-4 cannot recode record
S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
S $P(RECORD1,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
S $P(RECORD,"^",9,10)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
S ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
S ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
S Y=1 ;1 record recoded properly
Q
REMOVE(LEVEL0,LEVEL1) ;Entry point to remove e signature from record
NEW I,RECORD,RECORD1
S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0))
S RECORD1=$G(^PRC(442,LEVEL0,6,LEVEL1,1))
F I=10 S $P(RECORD,"^",I)=""
F I=1,2,3 S $P(RECORD1,"^",I)=""
S ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
S ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
Q
VERIFY(LEVEL0,LEVEL1) ;extrinsic function to verify version 1 signature. Returns 1 if valid
NEW RECORD,RECORD1,VERSION,SIGBLOCK
S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0))
S VERSION=$P(RECORD,"^",9),SIGBLOCK=$P(RECORD,"^",10)
I VERSION_SIGBLOCK="" Q 1
Q ($$SUM^PRCUESIG($$DECODE(LEVEL0,LEVEL1))=SIGBLOCK)
STRING(X,X1) ;Build String of critical fields
Q $P(X,"^",1,4)_"^"_$P(X1,"^",3)
--- Routine Detail --- with STRUCTURED ROUTINE LISTING ---[H[J[2J[HPRCHES6 3170 printed Nov 22, 2024@17:17:29 Page 2
PRCHES6 ;WISC/RHD/AKS-ESIG MAINTENANCE ROUTINE ;8/18/94 3:30 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 SUBFIELD 7 (ELECTRONIC SIGNATURE)
+3 ; FIELD 50 (AMMENDMENT) FILE 442
DECODE(LEVEL0,LEVEL1) ;Extrinsic Function to return hashed electronic sig to readable form.
+1 ;returns "" if unsuccessful
+2 NEW RECORD,RECORD1,VERSION,PERSON,SIG,CHECKSUM
+3 SET RECORD=$GET(^PRC(442,LEVEL0,6,LEVEL1,0))
IF RECORD=""
QUIT ""
+4 SET RECORD1=$GET(^PRC(442,LEVEL0,6,LEVEL1,1))
+5 SET VERSION=$PIECE(RECORD,"^",9)
+6 SET PERSON=+$PIECE(RECORD1,"^")
+7 IF VERSION'=""
IF VERSION'=1
QUIT ""
+8 SET SIG=$PIECE(RECORD1,"^",2)
D1 ;decode e signature for version 1
+1 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
+2 QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
ENCODE(LEVEL0,LEVEL1,USERNUM,Y) ;Encode e signature for version 1 only
+1 NEW RECORD,RECORD1,SIGBLOCK,CHECKSUM,OLDUSER
+2 SET USERNUM=+USERNUM
+3 ;-3 no user number
IF USERNUM=0
SET Y=-3
QUIT
+4 SET SIGBLOCK=$PIECE($GET(^VA(200,USERNUM,20)),"^",2)
+5 ;-2 no signature block
IF SIGBLOCK=""
SET Y=-2
QUIT
+6 SET RECORD=$GET(^PRC(442,LEVEL0,6,LEVEL1,0))
+7 SET RECORD1=$GET(^PRC(442,LEVEL0,6,LEVEL1,1))
+8 ;-1 no 2237 record
IF RECORD=""
SET Y=-1
QUIT
+9 ;-4 cannot re-sign record
IF $PIECE(RECORD1,"^",2)'=""
SET Y=-4
QUIT
+10 SET OLDUSER=+$PIECE(RECORD1,"^",1)
+11 IF OLDUSER=0
SET $PIECE(RECORD1,"^",1)=USERNUM
+12 IF OLDUSER>0
SET USERNUM=OLDUSER
+13 if $PIECE(RECORD1,"^",3)=""
SET $PIECE(RECORD1,"^",3)=$$NOW^PRCUESIG
+14 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
+15 SET $PIECE(RECORD1,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
+16 SET $PIECE(RECORD,"^",9,10)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
+17 SET ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
+18 SET ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
+19 SET Y=1
QUIT
RECODE(LEVEL0,LEVEL1,Y) ;Recode ESIG for version 1 only
+1 NEW RECORD,RECORD1,SIGBLOCK,CHECKSUM,USERNUM
+2 SET RECORD=$GET(^PRC(442,LEVEL0,6,LEVEL1,0))
+3 SET RECORD1=$GET(^PRC(442,LEVEL0,6,LEVEL1,1))
+4 ;-1 no record
IF RECORD=""!(RECORD1="")
SET Y=-1
QUIT
+5 SET USERNUM=+$PIECE(RECORD1,"^")
+6 ;-4 cannot recode record
IF $PIECE(RECORD1,"^",2)=""!(USERNUM=0)
SET Y=-4
QUIT
+7 SET SIGBLOCK=$PIECE($GET(^VA(200,USERNUM,20)),"^",2)
+8 SET CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
+9 SET $PIECE(RECORD1,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
+10 SET $PIECE(RECORD,"^",9,10)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
+11 SET ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
+12 SET ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
+13 ;1 record recoded properly
SET Y=1
+14 QUIT
REMOVE(LEVEL0,LEVEL1) ;Entry point to remove e signature from record
+1 NEW I,RECORD,RECORD1
+2 SET RECORD=$GET(^PRC(442,LEVEL0,6,LEVEL1,0))
+3 SET RECORD1=$GET(^PRC(442,LEVEL0,6,LEVEL1,1))
+4 FOR I=10
SET $PIECE(RECORD,"^",I)=""
+5 FOR I=1,2,3
SET $PIECE(RECORD1,"^",I)=""
+6 SET ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
+7 SET ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
+8 QUIT
VERIFY(LEVEL0,LEVEL1) ;extrinsic function to verify version 1 signature. Returns 1 if valid
+1 NEW RECORD,RECORD1,VERSION,SIGBLOCK
+2 SET RECORD=$GET(^PRC(442,LEVEL0,6,LEVEL1,0))
+3 SET VERSION=$PIECE(RECORD,"^",9)
SET SIGBLOCK=$PIECE(RECORD,"^",10)
+4 IF VERSION_SIGBLOCK=""
QUIT 1
+5 QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0,LEVEL1))=SIGBLOCK)
STRING(X,X1) ;Build String of critical fields
+1 QUIT $PIECE(X,"^",1,4)_"^"_$PIECE(X1,"^",3)
