63 lines
2.7 KiB
Mathematica
63 lines
2.7 KiB
Mathematica
PRCHES10 ;WISC/RHD/AKS-ESIG MAINTENANCE ROUTINE ;4/28/93 15:12
|
|
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 (AMENDMENT) FILE 443.6
|
|
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=$G(^PRC(443.6,LEVEL0,6,LEVEL1,0)) I RECORD="" Q ""
|
|
S RECORD1=$G(^PRC(443.6,LEVEL0,6,LEVEL1,1))
|
|
S VERSION=$P(RECORD,"^",9)
|
|
S PERSON=+$P(RECORD1,"^")
|
|
I VERSION'="",VERSION'=1 Q ""
|
|
S SIG=$P(RECORD1,"^",2)
|
|
I VERSION=1 G D1
|
|
D ;decode e signature less than version 1
|
|
S X=$$DECODE^PRCUESIG(SIG,LEVEL1,PERSON)
|
|
Q X
|
|
D1 ;decode e signature for version 1
|
|
S CHECKSUM=$$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 available for filing
|
|
S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
|
|
I SIGBLOCK="" S Y=-2 Q ;-2 no signature block in file 200
|
|
S RECORD=$G(^PRC(443.6,LEVEL0,6,LEVEL1,0))
|
|
S RECORD1=$G(^PRC(443.6,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,"^")
|
|
I OLDUSER=0 S $P(RECORD1,"^")=USERNUM
|
|
I OLDUSER>0 S USERNUM=OLDUSER
|
|
S:$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 $P(RECORD,"^",9)="1",$P(RECORD,"^",10)=$$SUM^PRCUESIG(SIGBLOCK)
|
|
S ^PRC(443.6,LEVEL0,6,LEVEL1,0)=RECORD
|
|
S ^PRC(443.6,LEVEL0,6,LEVEL1,1)=RECORD1
|
|
S Y=1 Q
|
|
REMOVE(LEVEL0,LEVEL1) ;Entry point to remove e signature from record
|
|
NEW RECORD,RECORD1
|
|
S Y=""
|
|
;S RECORD=$G(^PRC(443.6,LEVEL0,6,LEVEL1,0)) Q:RECORD=""
|
|
;S $P(^PRC(443.6,LEVEL0,6,LEVEL1,0),"^",2,3)="^",$P(^(0),"^",10)="",$P(^(1),"^")="",$P(^(1),"^",2)=""
|
|
S RECORD=$G(^PRC(443.6,LEVEL0,6,LEVEL1,0))
|
|
S RECORD1=$G(^PRC(443.6,LEVEL0,6,LEVEL1,1))
|
|
I RECORD=""!(RECORD1="") S Y=-1 Q
|
|
S $P(RECORD1,"^",2,3)="^",$P(RECORD,"^",10)=""
|
|
S ^PRC(443.6,LEVEL0,6,LEVEL1,0)=RECORD
|
|
S ^PRC(443.6,LEVEL0,6,LEVEL1,1)=RECORD1
|
|
Q
|
|
VERIFY(LEVEL0,LEVEL1) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
|
|
NEW RECORD1,VERSION,SIGBLOCK
|
|
S RECORD1=$G(^PRC(443.6,LEVEL0,6,LEVEL1,1))
|
|
S VERSION=$P(RECORD,"^",9),SIGBLOCK=$P(RECORD,"^",10)
|
|
I VERSION_SIGBLOCK="" Q 1
|
|
Q ($$SUM^PRCUESIG($$DECODE(LEVEL0,LEVEL1))=SIGBLOCK)
|
|
STRING(X,X1) ;Build String of critical fields
|
|
Q $P(X,"^",1,4)_"^"_$P(X1,"^",3)
|
|
Q
|