| 1 | PRCFDES3 ;WISC/LEM-ESIG MAINTENANCE ROUTINE ;7/14/94 10:23 AM
|
|---|
| 2 | V ;;5.1;IFCAP;;Oct 20, 2000
|
|---|
| 3 | ;Per VHA Directive 10-93-142, this routine should not be modified.
|
|---|
| 4 | ;ROUTINE FOR MAINTAINING FIELD 67 (CONTROL POINT ELEC SIG), FILE 421.5
|
|---|
| 5 | DECODE(LEVEL0) ;Extrinsic Function to return hashed electronic sig to readable form.
|
|---|
| 6 | ;returns "" if unsuccessful
|
|---|
| 7 | NEW RECORD2,RECORD21,VERSION,PERSON,SIG,CHECKSUM
|
|---|
| 8 | ;get record and check version
|
|---|
| 9 | S RECORD2=$G(^PRCF(421.5,LEVEL0,2)) I RECORD2="" QUIT ""
|
|---|
| 10 | S RECORD21=$G(^PRCF(421.5,LEVEL0,2.1))
|
|---|
| 11 | S VERSION=$P(RECORD21,"^",7)
|
|---|
| 12 | S PERSON=+$P(RECORD2,"^",18)
|
|---|
| 13 | I VERSION'="",VERSION'=1 Q ""
|
|---|
| 14 | S SIG=$P(RECORD2,"^",19)
|
|---|
| 15 | D1 ;decode e signature for version 1
|
|---|
| 16 | S RECORD=$G(^PRCF(421.5,LEVEL0,0))
|
|---|
| 17 | S RECORD1=$G(^PRCF(421.5,LEVEL0,1))
|
|---|
| 18 | S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1))
|
|---|
| 19 | QUIT $$DECODE^PRCUESIG(SIG,PERSON,CHECKSUM)
|
|---|
| 20 | ENCODE(LEVEL0,USERNUM,Y) ;Encode e signature for version 1 only
|
|---|
| 21 | ;Parameter passing entry point
|
|---|
| 22 | NEW SIGBLOCK,CHECKSUM,OLDUSER
|
|---|
| 23 | NEW RECORD,RECORD1,RECORD2,RECORD21
|
|---|
| 24 | ;get record
|
|---|
| 25 | S USERNUM=+USERNUM
|
|---|
| 26 | I USERNUM=0 S Y=-3 QUIT ;-3 no user num available
|
|---|
| 27 | S SIGBLOCK=$P($G(^VA(200,USERNUM,20)),"^",2)
|
|---|
| 28 | I SIGBLOCK="" S Y=-2 QUIT ;-2 no sigblock in file 200
|
|---|
| 29 | S RECORD=$G(^PRCF(421.5,LEVEL0,0))
|
|---|
| 30 | S RECORD1=$G(^PRCF(421.5,LEVEL0,1))
|
|---|
| 31 | S RECORD2=$G(^PRCF(421.5,LEVEL0,2))
|
|---|
| 32 | S RECORD21=$G(^PRCF(421.5,LEVEL0,2.1))
|
|---|
| 33 | I RECORD="" S Y=-1 QUIT ;-1 no transaction record
|
|---|
| 34 | I $P(RECORD2,"^",19)'="" S Y=-4 QUIT ;-4 cannot re-sign record
|
|---|
| 35 | S OLDUSER=+$P(RECORD2,"^",18)
|
|---|
| 36 | I OLDUSER=0 S $P(RECORD2,"^",18)=USERNUM
|
|---|
| 37 | I OLDUSER>0 S USERNUM=OLDUSER
|
|---|
| 38 | S:$P(RECORD21,"^",9)="" $P(RECORD21,"^",9)=$$NOW^PRCUESIG
|
|---|
| 39 | S CHECKSUM=$$SUM^PRCUESIG(LEVEL0_"^"_$$STRING(RECORD,RECORD1))
|
|---|
| 40 | S $P(RECORD2,"^",19)=$$ENCODE^PRCUESIG(SIGBLOCK,USERNUM,CHECKSUM)
|
|---|
| 41 | S $P(RECORD21,"^",7,8)="1^"_$$SUM^PRCUESIG(SIGBLOCK)
|
|---|
| 42 | S ^PRCF(421.5,LEVEL0,2)=RECORD2
|
|---|
| 43 | S ^PRCF(421.5,LEVEL0,2.1)=RECORD21
|
|---|
| 44 | S Y=1 QUIT
|
|---|
| 45 | REMOVE(LEVEL0) ;Entry point to remove e signature from record
|
|---|
| 46 | ;NOT an extrinsic function
|
|---|
| 47 | NEW RECORD2,RECORD21,I
|
|---|
| 48 | S RECORD2=$G(^PRCF(421.5,LEVEL0,2))
|
|---|
| 49 | S RECORD21=$G(^PRCF(421.5,LEVEL0,2.1))
|
|---|
| 50 | F I=18,19 S $P(RECORD2,"^",I)=""
|
|---|
| 51 | F I=8,9 S $P(RECORD21,"^",I)=""
|
|---|
| 52 | S ^PRCF(421.5,LEVEL0,2)=RECORD2
|
|---|
| 53 | S ^PRCF(421.5,LEVEL0,2.1)=RECORD21
|
|---|
| 54 | QUIT
|
|---|
| 55 | VERIFY(LEVEL0) ;extrinsic function to verify version 1 signature. Returns 1 if valid, 0 if not valid
|
|---|
| 56 | NEW RECORD21,VERSION,SIGBLOCK
|
|---|
| 57 | ;get record variables
|
|---|
| 58 | S RECORD21=$G(^PRCF(421.5,LEVEL0,2.1))
|
|---|
| 59 | S VERSION=$P(RECORD21,"^",7),SIGBLOCK=$P(RECORD21,"^",8)
|
|---|
| 60 | I VERSION_SIGBLOCK="" QUIT 1
|
|---|
| 61 | QUIT ($$SUM^PRCUESIG($$DECODE(LEVEL0))=SIGBLOCK)
|
|---|
| 62 | STRING(X,X1) ;Build String of critical fields
|
|---|
| 63 | NEW RECORD,RECORD1
|
|---|
| 64 | Q $P(X,"^",1)_"^"_$P(X,"^",3)_"^"_$P(X,"^",4)_"^"_$P(X,"^",8)_"^"_$P(X,"^",15)_"^"_$P(X1,"^",3)
|
|---|
