testhsign2

--program testing hsign2

os.loadAPI("theinsektAPIs/sha256")
os.loadAPI("theinsektAPIs/hsign2")

args={...}

if #args==0 then
 print("usage_sender: testhsign2 secret modemside targetid")
 print("usage_receiver: testhsign2 secret modemside")
 return
end

local protocol="hsign2"
local secret=args[1]
local side=args[2]

if secret==nil then error("Error: secret has no value") end
if side==nil then error("Error: side has no value") end
rednet.open(side)


print(#args)
if #args >= 3 then
 local id=tonumber(args[3])
 local sign=hsign2.getSigner(secret,sha256.sha256)
 while(true) do
  print("input:")
  local input=read()
  local signedMessage=sign(input)
  rednet.send(id,signedMessage,protocol, secret)
  print("sent: ",signedMessage)
  print("done")
 end
else
 local verify=hsign2.getVerifier(secret,sha256.sha256)
 while(true) do
  print("waiting for message...")
  local id2, signedMessage, protocol2 =rednet.receive(protocol)
  print("respond to id: ",id2)
  print("respond with protocol: ",protocol2)
  print("signedMessage: ")
  print(signedMessage)
  local ok, message=verify(signedMessage)
  print("Verification result: ",ok)
  print("message: ",message)
  print("done")
 end
end