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