source: WorldVistAEHR/trunk/r/IFCAP-PRC-PRX--PRCA--PRCN/PRCHES6.m@ 1141

Last change on this file since 1141 was 613, checked in by George Lilly, 15 years ago

initial load of WorldVistAEHR

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1PRCHES6 ;WISC/RHD/AKS-ESIG MAINTENANCE ROUTINE ;8/18/94 3:30 PM
2V ;;5.1;IFCAP;;Oct 20, 2000
3 ;Per VHA Directive 10-93-142, this routine should not be modified.
4 ;ROUTINE FOR MAINTAINING SUBFIELD 7 (ELECTRONIC SIGNATURE)
5 ; FIELD 50 (AMMENDMENT) FILE 442
6DECODE(LEVEL0,LEVEL1) ;Extrinsic Function to return hashed electronic sig to readable form.
7 ;returns "" if unsuccessful
8 NEW RECORD,RECORD1,VERSION,PERSON,SIG,CHECKSUM
9 S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0)) I RECORD="" Q ""
10 S RECORD1=$G(^PRC(442,LEVEL0,6,LEVEL1,1))
11 S VERSION=$P(RECORD,"^",9)
12 S PERSON=+$P(RECORD1,"^")
13 I VERSION'="",VERSION'=1 Q ""
14 S SIG=$P(RECORD1,"^",2)
15D1 ;decode e signature for version 1
16 S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
17 Q $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
18ENCODE(LEVEL0,LEVEL1,USERNUM,Y) ;Encode e signature for version 1 only
19 NEW RECORD,RECORD1,SIGBLOCK,CHECKSUM,OLDUSER
20 S USERNUM=+USERNUM
21 I USERNUM=0 S Y=-3 Q ;-3 no user number
22 S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
23 I SIGBLOCK="" S Y=-2 Q ;-2 no signature block
24 S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0))
25 S RECORD1=$G(^PRC(442,LEVEL0,6,LEVEL1,1))
26 I RECORD="" S Y=-1 Q ;-1 no 2237 record
27 I $P(RECORD1,"^",2)'="" S Y=-4 Q ;-4 cannot re-sign record
28 S OLDUSER=+$P(RECORD1,"^",1)
29 I OLDUSER=0 S $P(RECORD1,"^",1)=USERNUM
30 I OLDUSER>0 S USERNUM=OLDUSER
31 S:$P(RECORD1,"^",3)="" $P(RECORD1,"^",3)=$$NOW^PRCUESIG
32 S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
33 S $P(RECORD1,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
34 S $P(RECORD,"^",9,10)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
35 S ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
36 S ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
37 S Y=1 Q
38RECODE(LEVEL0,LEVEL1,Y) ;Recode ESIG for version 1 only
39 N RECORD,RECORD1,SIGBLOCK,CHECKSUM,USERNUM
40 S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0))
41 S RECORD1=$G(^PRC(442,LEVEL0,6,LEVEL1,1))
42 I RECORD=""!(RECORD1="") S Y=-1 Q ;-1 no record
43 S USERNUM=+$P(RECORD1,"^")
44 I $P(RECORD1,"^",2)=""!(USERNUM=0) S Y=-4 Q ;-4 cannot recode record
45 S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
46 S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_LEVEL1_"^"_$$STRING(RECORD,RECORD1))
47 S $P(RECORD1,"^",2)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
48 S $P(RECORD,"^",9,10)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
49 S ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
50 S ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
51 S Y=1 ;1 record recoded properly
52 Q
53REMOVE(LEVEL0,LEVEL1) ;Entry point to remove e signature from record
54 NEW I,RECORD,RECORD1
55 S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0))
56 S RECORD1=$G(^PRC(442,LEVEL0,6,LEVEL1,1))
57 F I=10 S $P(RECORD,"^",I)=""
58 F I=1,2,3 S $P(RECORD1,"^",I)=""
59 S ^PRC(442,LEVEL0,6,LEVEL1,0)=RECORD
60 S ^PRC(442,LEVEL0,6,LEVEL1,1)=RECORD1
61 Q
62VERIFY(LEVEL0,LEVEL1) ;extrinsic function to verify version 1 signature. Returns 1 if valid
63 NEW RECORD,RECORD1,VERSION,SIGBLOCK
64 S RECORD=$G(^PRC(442,LEVEL0,6,LEVEL1,0))
65 S VERSION=$P(RECORD,"^",9),SIGBLOCK=$P(RECORD,"^",10)
66 I VERSION_SIGBLOCK="" Q 1
67 Q ($$SUM^PRCUESIG($$DECODE(LEVEL0,LEVEL1))=SIGBLOCK)
68STRING(X,X1) ;Build String of critical fields
69 Q $P(X,"^",1,4)_"^"_$P(X1,"^",3)
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