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dankedgelord
How do I cheat?
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Joined: 21 Mar 2017
Posts: 2
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 Posted: Sun Apr 09, 2017 9:55 am Post subject: New to lua, can I do XOR? |
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Hi, is it possible to do something like this in cheat engine lua scripting?
1. Go to a specific address
2. XOR the first 4 bytes, and the next 4 bytes.
3. If it returns something like 8F000000 for example, I want to take the first byte 8F, convert it to decimal and add 1 to it and return this value as an integer.
Thanks in advance if you have an answer for this.
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FreeER
Grandmaster Cheater Supreme
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Joined: 09 Aug 2013
Posts: 1091
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| Posted: Sun Apr 09, 2017 11:02 am Post subject: |
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The main.lua (and wiki) shows that these exist in lua:
| Code: | bOr(int1, int2) : Binary Or
bXor(int1, int2) : Binary Xor
bAnd(int1, int2) : Binary And
bShl(int, int2) : Binary shift left
bShr(int, int2) : Binary shift right
bNot(int) : Binary not |
So I think something like this should work:
| Code: | addr = "address of information"
val = readInteger(addr)
val2 = readInteger(addr.."+4") -- assuming a string address
xored = bXor(val, val2)
if xored == 0x8F000000 then
return 0x90
--[[
8F+1, lua knows it's a number so unless it needs to be a string it doesn't matter
if you use decimal 144 or hexadecimal 0x90 notation to write it.
if you did need it as a string then tostring(0x90) is all you need
though since you know the value you can do it with just return "144"
for a hex string string.format("%#X", 0x9a) would work
note that I used 9a to demonstrate the formatting better
the # adds 0x to the string, and the case of the X determines
the case of the letters in the hex value (x = a, X = A)
--]]
end |
Though you can probably forgo the variables and use:
| Code: | if bXor(readInteger("addr"), readInteger("addr+4")) == 0x8F000000 then
return 144
end |
If you don't know what the result will be and just want to return the result plus 1 then: | Code: | | return bShr(bXor(readInteger("addr"), readInteger("addr+4")),24)+1 |
or | Code: | | return tostring(bShr(bXor(readInteger("addr"), readInteger("addr+4")),24)+1) |
if you want/need it as a string
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ParkourPenguin
I post too much
 Reputation: 140
Joined: 06 Jul 2014
Posts: 4289
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| Posted: Sun Apr 09, 2017 11:05 am Post subject: |
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| Code: | function xor_cmp(address, value)
address = getAddress(address)
return readInteger(address) ~ readInteger(address+4) == value and (value >> 24) + 1 or nil
end
-- usage:
xor_cmp(0x038F192C, 0x8f000000) |
_________________
I don't know where I'm going, but I'll figure it out when I get there. |
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dankedgelord
How do I cheat?
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Joined: 21 Mar 2017
Posts: 2
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| Posted: Sun Apr 09, 2017 12:08 pm Post subject: |
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Thank you for the replies 
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