source: FOIAVistA/trunk/r/INTEGRATED_PATIENT_FUNDS-PRPF-PFXIP/PRPFSIG1.m@ 1757

Last change on this file since 1757 was 628, checked in by George Lilly, 15 years ago

initial load of FOIAVistA 6/30/08 version

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1PRPFSIG1 ;WISC@ALTOONA/CTB-ESIG MAINTENANCE ROUTINE ;11/22/96 4:45 PM
2V ;;3.0;PATIENT FUNDS;**6**;JUNE 1, 1989
3 ;ROUTINE FOR MAINTAINING FIELD 14 (ELECTRONIC SIGNATURE CIDE), FILE 470.1
4DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
5 ;returns "" if unsuccessful
6 NEW RECORD,VERSION,PERSON,SIG,CHECKSUM
7 ;get record and check version
8 S RECORD=$G(^PRPF(470.1,LEVEL0,0)) I RECORD="" QUIT ""
9 S VERSION=$P(RECORD,"^",22)
10 S PERSON=+$P(RECORD,"^",14)
11 I VERSION'="",VERSION'=1 Q ""
12 S SIG=$P(RECORD,"^",15)
13 I VERSION=1 G D1
14D ;decode e signature less than version 1
15 S X=$$DECODE^PRPFSIG(SIG,LEVEL0,PERSON)
16 QUIT X
17D1 ;decode e signature for version 1
18 S CHECKSUM=$$SUM^PRPFSIG(LEVEL0_"^"_$$STRING(RECORD))
19 QUIT $$DECODE^PRPFSIG(SIG,PERSON,CHECKSUM)
20ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
21 ;Parameter passing entry point
22 NEW RECORD,RECORD4,SIGBLOCK,CHECKSUM,OLDUSER
23 ;get record
24 S RECORD=$G(^PRPF(470.1,LEVEL0,0))
25 I RECORD="" S Y=-1 QUIT ;-1 no master record
26 S OLDUSER=+$P(RECORD,"^",14)
27 I OLDUSER=0 S $P(RECORD,"^",14)=USERNUM
28 I OLDUSER>0 S USERNUM=OLDUSER
29 S USERNUM=+USERNUM
30 I USERNUM=0 S Y=-3 QUIT ;-3 no user num available
31 S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
32 I SIGBLOCK="" S Y=-2 QUIT ;-2 no sigblock in file 200
33 I $P(RECORD,"^",15)'="" S Y=-4 QUIT ;-4 cannot re-sign record
34 S:$P(RECORD,"^",23)="" $P(RECORD,"^",23)=$$NOW^PRPFSIG
35 S CHECKSUM=$$SUM^PRPFSIG(LEVEL0_"^"_$$STRING(RECORD))
36 S $P(RECORD,"^",15)=$$ENCODE^PRPFSIG(SIGBLOCK,USERNUM,CHECKSUM)
37 S $P(RECORD,"^",22)=1,$P(RECORD,"^",17)=$$SUM^PRPFSIG(SIGBLOCK)
38 S ^PRPF(470.1,LEVEL0,0)=RECORD
39 S Y=1 QUIT
40REMOVE(LEVEL0) ;Entry point to remove e signature from record
41 ;NOT an extrinsic function
42 NEW I,RECORD
43 S RECORD=$G(^PRPF(470.1,LEVEL0,0))
44 F I=14,15,17,22,23 S $P(RECORD,"^",I)=""
45 S ^PRPF(470.1,LEVEL0,0)=RECORD
46 QUIT
47VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
48 NEW RECORD,VERSION,VALCODE
49 ;get record variables
50 S RECORD=$G(^PRPF(470.1,LEVEL0,0))
51 S VERSION=$P(RECORD,"^",22),VALCODE=$P(RECORD,"^",17)
52 I VERSION_VALCODE="" QUIT 1
53 QUIT ($$SUM^PRPFSIG($$DECODE(LEVEL0))=VALCODE)
54STRING(X) ;Build String of critical fields
55 Q $P(X,"^",1,13)_"^"_$P(X,"^",16)
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