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https://github.com/a2-4am/passport.git
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support Polarware anti-tamper check
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31666546f6
commit
13b6061bc1
@ -53,6 +53,11 @@ FIRSTFILTER
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!byte FALSE ; 0=true, 1=false
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; reset before each operation
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; set in patchers/f7f6
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;gPolarwareTamperCheck
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!byte FALSE ; 0=true, 1=false
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; reset before each operation
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; set in patchers/polarware
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; used to avoid an expensive search
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;gIsTrillium
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!byte FALSE ; 0=true, 1=false
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; reset before each operation
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@ -85,7 +85,8 @@ gIsSierra = gIsDatasoft-$01 ; byte
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gIsSierra13 = gIsSierra-$01 ; byte
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gIsF7F6 = gIsSierra13-$01 ; byte
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gIsTrillium = gIsF7F6-$01 ; byte
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gForceDiskVol = gIsTrillium-$01 ; byte
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gPolarwareTamperCheck = gIsTrillium-$01 ; byte
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gForceDiskVol = gPolarwareTamperCheck-$01 ; byte
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;LASTFILTER ; add new gIs* above this line
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gOnAClearDayYouCanReadForever = gForceDiskVol-$01 ; byte
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@ -152,6 +153,7 @@ ConstructStandardDelivery = jConstructStandardDelivery
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!warn "gIsSierra13=",gIsSierra13
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!warn "gIsF7F6=",gIsF7F6
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!warn "gIsTrillium=",gIsTrillium
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!warn "gPolarwareTamperCheck=",gPolarwareTamperCheck
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!warn "gForceDiskVol=",gIsForceDiskVol
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!warn "gOnAClearDayYouCanReadForever=",gOnAClearDayYouCanReadForever
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!warn "gUsingRAMDisk=",gUsingRAMDisk
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@ -25,10 +25,10 @@
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lda gIsProDOS ; only seen this protection on ProDOS disks
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bne .exit
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ldy #$06
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jsr SearchTrack
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!byte $39,$FD
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!byte $2F,$FB
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!byte $39,$FC
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jsr SearchTrack ; (all bytes are XOR #$FF)
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!byte $39,$FD ; DEC $02
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!byte $2F,$FB ; BNE +4
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!byte $39,$FC ; DEC $03
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bcs .exit
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inx
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inx
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@ -40,6 +40,6 @@
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pla
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ldy #$01
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jsr modify
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!byte $A2
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!byte $A2 ; change encrypted BNE +4 to +5D so code exits with Death Counter > 0
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.exit
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}
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@ -1,6 +1,6 @@
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;-------------------------------
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; #POLARWARE
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; a delayed secondary protection check
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; a delayed secondary protection check and anti-tamper check
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; seen on Polarware games
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; similar to #FBFFENCRYPTED but the encryption key is different
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; and the routine ultimately returns regardless of success or failure
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@ -18,11 +18,11 @@
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lda gIsProDOS ; only seen this protection on ProDOS disks
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bne .exit
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ldy #$06
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jsr SearchTrack
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!byte $29,$6D
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!byte $3F,$EB
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!byte $29,$60
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bcs .exit
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jsr SearchTrack ; (all bytes are XOR #$EF)
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!byte $29,$6D ; DEC $82
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!byte $3F,$EB ; BNE +4
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!byte $29,$60 ; DEC $8F
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bcs .tamper
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inx
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inx
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inx
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@ -33,6 +33,26 @@
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pla
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ldy #$01
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jsr modify
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!byte $B2
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!byte $B2 ; change encrypted BNE +4 to +5D so code exits with Death Counter > 0
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lda #TRUE
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sta gPolarwareTamperCheck
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.tamper lda gPolarwareTamperCheck
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bne .exit
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ldy #$0C
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jsr SearchTrack
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!byte $01,$02,$03,$03,$03,$03;prologue marker (not code)
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!byte $EC,WILDCARD,WILDCARD ; CPX absolute
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!byte $F0,$09 ; BEQ +9
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!byte $AE ; LDX
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bcs .exit
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pha
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txa
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adc #$09
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tax
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stx gDisplayBytes
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pla
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ldy #$01
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jsr modify
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!byte $50 ; change BEQ to BVC which acts as a branch-always
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.exit
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}
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@ -138,7 +138,7 @@ StringTable
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; can be set directly before calling PrintByID.
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;
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.header
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!text "Passport by 4am 2018-01-26",$00
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!text "Passport by 4am 2018-01-28",$00
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.mainmenu
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!text "________________________________________",$8D,$8D,$8D,$8D,$8D,$8D,$8D
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!text " "
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