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Fix LegicCash segment CRC computation

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This commit is contained in:
Jean-Michel Picod 2023-06-14 16:32:10 +02:00
commit fdd85d7e1e
1 changed files with 26 additions and 21 deletions
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47
client/luascripts/hf_legic.lua
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@ -221,7 +221,7 @@ end
--- ---
-- curency-codes for Legic-Cash-Segments (ISO 4217) -- curency-codes for Legic-Cash-Segments (ISO 4217)
local currency = { local currency = {
["03d2"]="EUR", ["03D2"]="EUR",
["0348"]="USD", ["0348"]="USD",
["033A"]="GBP", ["033A"]="GBP",
["02F4"]="CHF" ["02F4"]="CHF"
@ -1447,7 +1447,10 @@ function dumpLegicCash(tag, x)
print("--------------------------------\n\tLegic-Cash Values\n--------------------------------") print("--------------------------------\n\tLegic-Cash Values\n--------------------------------")
local limit, curr, balance, rid, tcv local limit, curr, balance, rid, tcv
-- currency of balance & limit -- currency of balance & limit
curr=currency[tag.SEG[x].data[8]..tag.SEG[x].data[9]] curr=string.upper(tag.SEG[x].data[8]..tag.SEG[x].data[9])
if currency[curr] ~= nil then
curr = currency[curr]
end
-- maximum balance -- maximum balance
limit=string.format("%4.2f", tonumber(tag.SEG[x].data[10]..tag.SEG[x].data[11]..tag.SEG[x].data[12], 16)/100) limit=string.format("%4.2f", tonumber(tag.SEG[x].data[10]..tag.SEG[x].data[11]..tag.SEG[x].data[12], 16)/100)
-- current balance -- current balance
@ -1784,17 +1787,17 @@ end
--- ---
-- edit Segment Data -- edit Segment Data
function editSegmentData(data) function editSegmentData(data, uid)
io.write("\n") io.write("\n")
if istable(data) == false then print("no Segment-Data found") end if istable(data) == false then print("no Segment-Data found") end
local lc = check4LegicCash(data) local lc = check4LegicCash(data, uid)
for i=0, #data-1 do for i=0, #data-1 do
data[i]=input(accyan.."Data"..i..acoff..": ", data[i]) data[i]=input(accyan.."Data"..i..acoff..": ", data[i])
end end
if (lc) then if (lc) then
data = fixLegicCash(data) data = fixLegicCash(data, uid)
end end
return data return data
end end
@ -1917,7 +1920,7 @@ function autoSelectSegment(tag, s)
repeat repeat
io.write(". ") io.write(". ")
x=x-1 x=x-1
res=check4LegicCash(tag.SEG[x].data) res=check4LegicCash(tag.SEG[x].data, uid)
until ( res or x==0 ) until ( res or x==0 )
end end
--- ---
@ -2011,7 +2014,7 @@ end
--- ---
-- edit Legic Cash -- edit Legic Cash
function editLegicCash(data) function editLegicCash(data, uid)
local limit, curr, balance, rid, tcv local limit, curr, balance, rid, tcv
-- currency of balance & limit -- currency of balance & limit
curr=currency[data[8]..data[9]] curr=currency[data[8]..data[9]]
@ -2064,12 +2067,12 @@ function editLegicCash(data)
data[20]=string.sub(rid, 5, 6) data[20]=string.sub(rid, 5, 6)
end end
return fixLegicCash(data) return fixLegicCash(data, uid)
end end
--- ---
-- chack for signature of a 'Legic-Cash-Segment' -- chack for signature of a 'Legic-Cash-Segment'
function check4LegicCash(data) function check4LegicCash(data, uid)
if(#data==32) then if(#data==32) then
local stamp_len=(#data-25) local stamp_len=(#data-25)
local stamp="" local stamp=""
@ -2077,9 +2080,9 @@ function check4LegicCash(data)
stamp=stamp..data[i].." " stamp=stamp..data[i].." "
end end
if (data[7]=="01") then if (data[7]=="01") then
if (("%04x"):format(utils.Crc16(dumpTable(data, "", 0, 12))) == data[13]..data[14]) then if (("%04x"):format(utils.Crc16Legic(dumpTable(data, "", 0, 12), uid)) == data[13]..data[14]) then
if (("%04x"):format(utils.Crc16(dumpTable(data, "", 15, 20))) == data[21]..data[22]) then if (("%04x"):format(utils.Crc16Legic(dumpTable(data, "", 15, 20), uid)) == data[21]..data[22]) then
if (("%04x"):format(utils.Crc16(dumpTable(data, "", 23, 29))) == data[30]..data[31]) then if (("%04x"):format(utils.Crc16Legic(dumpTable(data, "", 23, 29), uid)) == data[30]..data[31]) then
io.write(accyan.."Legic-Cash Segment detected "..acoff) io.write(accyan.."Legic-Cash Segment detected "..acoff)
return true return true
end end
@ -2156,7 +2159,7 @@ end
--- ---
-- repair / fix crc's of a 'Legic-Cash-Segment' -- repair / fix crc's of a 'Legic-Cash-Segment'
function fixLegicCash(data) function fixLegicCash(data, uid)
if(#data==32 and data[7]=="01") then if(#data==32 and data[7]=="01") then
local crc1, crc2, crc3 local crc1, crc2, crc3
-- set shadow-balance equal to balance -- set shadow-balance equal to balance
@ -2168,9 +2171,9 @@ function fixLegicCash(data)
data[27]=data[19] data[27]=data[19]
data[28]=data[20] data[28]=data[20]
-- calculate all crc's -- calculate all crc's
crc1=("%04x"):format(utils.Crc16(dumpTable(data, "", 0, 12))) crc1=("%04x"):format(utils.Crc16Legic(dumpTable(data, "", 0, 12), uid))
crc2=("%04x"):format(utils.Crc16(dumpTable(data, "", 15, 20))) crc2=("%04x"):format(utils.Crc16Legic(dumpTable(data, "", 15, 20), uid))
crc3=("%04x"):format(utils.Crc16(dumpTable(data, "", 23, 29))) crc3=("%04x"):format(utils.Crc16Legic(dumpTable(data, "", 23, 29), uid))
-- set crc's -- set crc's
data[13]=string.sub(crc1, 1, 2) data[13]=string.sub(crc1, 1, 2)
data[14]=string.sub(crc1, 3, 4) data[14]=string.sub(crc1, 3, 4)
@ -2413,7 +2416,7 @@ function modifyMode()
for i=0, #inTAG.SEG do for i=0, #inTAG.SEG do
if(check43rdPartyCash1(uid, inTAG.SEG[i].data)) then if(check43rdPartyCash1(uid, inTAG.SEG[i].data)) then
io.write(accyan.."in Segment index: "..inTAG.SEG[i].index ..acoff.. "\n") io.write(accyan.."in Segment index: "..inTAG.SEG[i].index ..acoff.. "\n")
elseif(check4LegicCash(inTAG.SEG[i].data)) then elseif(check4LegicCash(inTAG.SEG[i].data, uid)) then
io.write(accyan.."in Segment index: "..inTAG.SEG[i].index..acoff.."\n") io.write(accyan.."in Segment index: "..inTAG.SEG[i].index..acoff.."\n")
lc=true; lc=true;
lci=inTAG.SEG[i].index; lci=inTAG.SEG[i].index;
@ -2520,7 +2523,7 @@ function modifyMode()
if (type(x)=="string" and string.len(x)>0) then sel=tonumber(x,10) if (type(x)=="string" and string.len(x)>0) then sel=tonumber(x,10)
else sel=selectSegment(inTAG) end else sel=selectSegment(inTAG) end
if (istable(inTAG.SEG[sel])) then if (istable(inTAG.SEG[sel])) then
inTAG.SEG[sel].data=editSegmentData(inTAG.SEG[sel].data) inTAG.SEG[sel].data=editSegmentData(inTAG.SEG[sel].data, inTAG.MCC)
end end
end, end,
--- ---
@ -2587,13 +2590,15 @@ function modifyMode()
else else
x = selectSegment(inTAG) x = selectSegment(inTAG)
end end
inTAG.SEG[x].data=fixLegicCash(inTAG.SEG[x].data) local uid=inTAG.MCD..inTAG.MSN0..inTAG.MSN1..inTAG.MSN2
inTAG.SEG[x].data=fixLegicCash(inTAG.SEG[x].data, uid)
end, end,
--- ---
-- edit legic-cash values fixLegicCash(data) -- edit legic-cash values fixLegicCash(data, mcc)
["elc"] = function(x) ["elc"] = function(x)
x=autoSelectSegment(inTAG, "legiccash") x=autoSelectSegment(inTAG, "legiccash")
inTAG.SEG[x].data=editLegicCash(inTAG.SEG[x].data) local uid=inTAG.MCD..inTAG.MSN0..inTAG.MSN1..inTAG.MSN2
inTAG.SEG[x].data=editLegicCash(inTAG.SEG[x].data, uid)
end, end,
--- ---
-- dump legic-cash human-readable -- dump legic-cash human-readable