mirror of
https://github.com/osmarks/random-stuff
synced 2024-11-08 13:39:53 +00:00
56 lines
1.3 KiB
Lua
56 lines
1.3 KiB
Lua
local privkey_path = ".potatos_dsk"
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if not fs.exists(privkey_path) then
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error("Please save the potatOS disk signing key (ECC signing key) to " .. privkey_path .. " to use this program.")
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end
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local ecc = require "./ecc" "ecc"
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local input, output, UUID_override = ...
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local function fread(thing)
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local f = fs.open(thing, "r")
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local text = f.readAll()
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f.close()
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return text
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end
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local function hexize(key)
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local out = ""
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for _, v in pairs(key) do
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out = out .. string.format("%.2x", v)
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end
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return out
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end
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local function unhexize(key)
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local out = {}
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for i = 1, #key, 2 do
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local pair = key:sub(i, i + 1)
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table.insert(out, tonumber(pair, 16))
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end
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return out
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end
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local function fwrite(fname, text)
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local f = fs.open(fname, "w")
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f.write(text)
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f.close()
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end
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local pkey = unhexize(fread(privkey_path))
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local UUID = ""
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if UUID_override then UUID = UUID_override
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else
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for i = 1, 10 do
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UUID = UUID .. string.char(math.random(97, 122))
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end
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end
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print("UUID:", UUID)
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local text = fread(input):gsub("@UUID@", UUID)
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local signature = hexize(ecc.sign(pkey, text))
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local fullcode = ([[---PXSIG:%s
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---PXUUID:%s
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%s]]):format(signature, UUID, text)
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fwrite(output, fullcode) |