source: WorldVistAEHR/trunk/r/IFCAP-PRC-PRX--PRCA--PRCN/PRCSC4.m@ 619

Last change on this file since 619 was 613, checked in by George Lilly, 15 years ago

initial load of WorldVistAEHR

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1PRCSC4 ;WISC/LEM-ESIG MAINTENANCE ROUTINE ;5/20/93 9:13 AM
2V ;;5.1;IFCAP;;Oct 20, 2000
3 ;Per VHA Directive 10-93-142, this routine should not be modified.
4 ;ROUTINE FOR MAINTAINING FIELD 63 (LOG CODE CODE SHEETS ELEC.SIG.), FILE 410
5DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
6 ;returns "" if unsuccessful
7 NEW RECORD,RECRD100,VERSION,PERSON,SIG,CHECKSUM
8 ;get record and check version
9 S RECORD=$G(^PRCS(410,LEVEL0,0)) I RECORD="" QUIT ""
10 S RECRD100=$G(^PRCS(410,LEVEL0,100))
11 S VERSION=$P(RECRD100,"^",9)
12 S PERSON=+$P(RECRD100,"^",4)
13 I VERSION'="",VERSION'=1 Q ""
14 S SIG=$P(RECRD100,"^",5)
15D1 ;decode e signature for version 1
16 S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECRD100))
17 QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
18ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
19 ;Parameter passing entry point
20 NEW RECORD,RECRD100,SIGBLOCK,CHECKSUM,OLDUSER
21 ;get record
22 S USERNUM=+USERNUM
23 I USERNUM=0 S Y=-3 QUIT ;-3 no user num available
24 S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
25 I SIGBLOCK="" S Y=-2 QUIT ;-2 no sigblock in file 200
26 S RECORD=$G(^PRCS(410,LEVEL0,0))
27 S RECRD100=$G(^PRCS(410,LEVEL0,100))
28 I RECORD="" S Y=-1 QUIT ;-1 no transaction record
29 I $P(RECRD100,"^",5)'="" S Y=-4 QUIT ;-4 cannot re-sign record
30 S OLDUSER=+$P(RECRD100,"^",4)
31 I OLDUSER=0 S $P(RECRD100,"^",4)=USERNUM
32 I OLDUSER>0 S USERNUM=OLDUSER
33 S:$P(RECRD100,"^",6)="" $P(RECRD100,"^",6)=$$NOW^PRCUESIG
34 S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECRD100))
35 S $P(RECRD100,"^",5)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
36 S $P(RECRD100,"^",9,10)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
37 S ^PRCS(410,LEVEL0,100)=RECRD100
38 S Y=1 QUIT
39REMOVE(LEVEL0) ;Entry point to remove e signature from record
40 ;NOT an extrinsic function
41 NEW RECRD100
42 S RECRD100=$G(^PRCS(410,LEVEL0,100))
43 S $P(RECRD100,"^",4,6)="^^"
44 S $P(RECRD100,"^",10)=""
45 S ^PRCS(410,LEVEL0,100)=RECRD100
46 QUIT
47VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
48 NEW RECRD100,VERSION,SIGBLOCK
49 ;get record variables
50 S RECRD100=$G(^PRCS(410,LEVEL0,100))
51 S VERSION=$P(RECRD100,"^",9),SIGBLOCK=$P(RECRD100,"^",10)
52 I VERSION_SIGBLOCK="" QUIT 1
53 QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
54STRING(X100) ;Build String of critical fields
55 NEW RECRD100,SIGBLOCK,CHECKSUM,OLDUSER
56 Q $P(X100,"^",6)_"^"_$P(X100,"^",7)_"^"_$P(X100,"^",8)
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