krist.lua

os.loadAPI("sha")

write("Enter wallet password: ")
local pw1 = read("*")
write("Confirm password: ")
local pw2 = read("*")
assert(pw1 == pw2, "Passwords do not match")
local key = sha.digest("KRISTWALLET" .. pw1):toHex() .. "-000"
local f = fs.open("/privatekey", "w")
f.write(key)
f.close()