99 lines
4.2 KiB
Mathematica
99 lines
4.2 KiB
Mathematica
PRCSC1 ;WISC/LEM-ESIG MAINTENANCE ROUTINE ;4/23/97 8:55 AM
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V ;;5.1;IFCAP;;Oct 20, 2000
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;Per VHA Directive 10-93-142, this routine should not be modified.
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;ROUTINE FOR MAINTAINING FIELD 44.5 (ELECTRONIC SIGNATURE), FILE 410
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DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
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;returns "" if unsuccessful
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NEW RECORD7,RECORD71,VERSION,PERSON,SIG,CHECKSUM
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;get record and check version
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S RECORD7=$G(^PRCS(410,LEVEL0,7)) I RECORD7="" QUIT ""
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S RECORD71=$G(^PRCS(410,LEVEL0,7.1))
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S VERSION=$P(RECORD71,"^",3)
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S PERSON=+$P(RECORD7,"^",3)
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I VERSION'="",VERSION'=1 Q ""
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S SIG=$P(RECORD7,"^",6)
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I VERSION=1 G D1
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D ;decode e signature less than version 1
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S X=$$DECODE^PRCUESIG(SIG,LEVEL0,PERSON)
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QUIT X
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D1 ;decode e signature for version 1
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S RECORD=$G(^PRCS(410,LEVEL0,0))
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S RECORD1=$G(^PRCS(410,LEVEL0,1))
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S RECORD2=$G(^PRCS(410,LEVEL0,2))
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S RECORD3=$G(^PRCS(410,LEVEL0,3))
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S RECORD4=$G(^PRCS(410,LEVEL0,4))
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S RECORD10=$G(^PRCS(410,LEVEL0,10))
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S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD2,RECORD3,RECORD4,RECORD7,RECORD10))
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QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
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ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
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;Parameter passing entry point
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NEW RECORD,RECORD7,RECORD71,SIGBLOCK,CHECKSUM,OLDUSER
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;get record
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S USERNUM=+USERNUM
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I USERNUM=0 S Y=-3 QUIT ;-3 no user num available
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S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
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I SIGBLOCK="" S Y=-2 QUIT ;-2 no sigblock in file 200
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S RECORD=$G(^PRCS(410,LEVEL0,0))
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S RECORD1=$G(^PRCS(410,LEVEL0,1))
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S RECORD2=$G(^PRCS(410,LEVEL0,2))
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S RECORD3=$G(^PRCS(410,LEVEL0,3))
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S RECORD4=$G(^PRCS(410,LEVEL0,4))
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S RECORD7=$G(^PRCS(410,LEVEL0,7))
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S RECORD71=$G(^PRCS(410,LEVEL0,7.1))
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S RECORD10=$G(^PRCS(410,LEVEL0,10))
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I RECORD="" S Y=-1 QUIT ;-1 no transaction record
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I $P(RECORD7,"^",6)'="" S Y=-4 QUIT ;-4 cannot re-sign record
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S OLDUSER=+$P(RECORD7,"^",3)
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I OLDUSER=0 S $P(RECORD7,"^",3)=USERNUM
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I OLDUSER>0 S USERNUM=OLDUSER
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S:$P(RECORD7,"^",7)="" $P(RECORD7,"^",7)=$$NOW^PRCUESIG
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S:$P(RECORD7,"^",5)="" $P(RECORD7,"^",5)=$P($$NOW^PRCUESIG,".",1)
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S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD2,RECORD3,RECORD4,RECORD7,RECORD10))
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S $P(RECORD7,"^",6)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
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S $P(RECORD7,"^",4)=$P($G(^VA(200,USERNUM,20)),"^",3)
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S $P(RECORD71,"^",3,4)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
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S ^PRCS(410,LEVEL0,7)=RECORD7
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S ^PRCS(410,LEVEL0,7.1)=RECORD71
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S Y=1 QUIT
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RECODE(LEVEL0,Y) ;Recode esig for version 1 only
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NEW RECORD,RECORD7,RECORD71,SIGBLOCK,CHECKSUM
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NEW DA,DIC,RECORD1,RECORD10,RECORD2,RECORD3,RECORD4,USERNUM
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S RECORD=$G(^PRCS(410,LEVEL0,0))
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S RECORD1=$G(^PRCS(410,LEVEL0,1))
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S RECORD2=$G(^PRCS(410,LEVEL0,2))
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S RECORD3=$G(^PRCS(410,LEVEL0,3))
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S RECORD4=$G(^PRCS(410,LEVEL0,4))
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S RECORD7=$G(^PRCS(410,LEVEL0,7))
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S RECORD71=$G(^PRCS(410,LEVEL0,7.1))
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S RECORD10=$G(^PRCS(410,LEVEL0,10))
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I RECORD="" S Y=-1 QUIT ;-1 no transaction record
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S USERNUM=+$P(RECORD7,"^",3)
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I $P(RECORD7,"^",6)=""!(USERNUM=0) S Y=-4 QUIT ;-4 cannot re-sign record
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S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
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S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1,RECORD2,RECORD3,RECORD4,RECORD7,RECORD10))
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S $P(RECORD7,"^",6)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
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S $P(RECORD7,"^",4)=$P($G(^VA(200,USERNUM,20)),"^",3)
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S $P(RECORD71,"^",3,4)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
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S ^PRCS(410,LEVEL0,7)=RECORD7
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S ^PRCS(410,LEVEL0,7.1)=RECORD71
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S Y=1 QUIT
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REMOVE(LEVEL0) ;Entry point to remove e signature from record
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;NOT an extrinsic function
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NEW RECORD7,RECORD71
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S RECORD7=$G(^PRCS(410,LEVEL0,7))
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S RECORD71=$G(^PRCS(410,LEVEL0,7.1))
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S $P(RECORD7,"^",3,7)="^^^^"
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S $P(RECORD71,"^",4)=""
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S ^PRCS(410,LEVEL0,7)=RECORD7
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S ^PRCS(410,LEVEL0,7.1)=RECORD71
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QUIT
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VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
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NEW RECORD71,VERSION,SIGBLOCK
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;get record variables
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S RECORD71=$G(^PRCS(410,LEVEL0,7.1))
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S VERSION=$P(RECORD71,"^",3),SIGBLOCK=$P(RECORD71,"^",4)
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I VERSION_SIGBLOCK="" QUIT 1
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QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
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STRING(X,X1,X2,X3,X4,X7,X10) ;Build String of critical fields
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Q $P(X,"^",1)_"^"_$P(X1,"^",1)_"^"_$P(X2,"^",1)_"^"_$P(X3,"^",1)_"^"_$P(X3,"^",3)_"^"_$P(X4,"^",1)_"^"_$P(X7,"^",7)_"^"_$P(X10,"^",1)
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