yesod skelton and routes for pairing

yet more changes to pairing message data types

Assistant/Pairing.hs

@@ -12,26 +12,24 @@ import Utility.Verifiable
 
 import Network.Socket (HostName)
 
-{- Messages sent in pairing are all verifiable using a secret that
- - should be shared between the systems being paired. -}
-type PairMsg = Verifiable (PairStage, HostInfo, SshPubKey)
-
-mkPairMsg :: Secret -> PairStage -> HostInfo -> SshPubKey -> PairMsg
-mkPairMsg secret pairstage hostinfo sshkey = mkVerifiable
-	(pairstage, hostinfo, sshkey) secret
-
-data PairStage
-	{- "I'd like to pair with somebody who knows a secret.
-	 - Here's my ssh key, and hostinfo." -}
-	= PairRequest
-	{- "I've checked your PairRequest, and like it; I set up
-	 - your ssh key already. Here's mine." -}
-	| PairAck
+{- "I'd like to pair with somebody who knows a secret." -}
+data PairReq = PairReq (Verifiable PairData)
 	deriving (Eq, Read, Show)
 
-data HostInfo = HostInfo
+{- "I've checked your PairReq, and like it.
+ - I set up your ssh key already. Here's mine for you to set up." -}
+data PairAck = PairAck (Verifiable PairData)
+	deriving (Eq, Read, Show)
+
+data PairMsg
+	= PairReqM PairReq
+	| PairAckM PairAck
+	deriving (Eq, Read, Show)
+
+data PairData = PairData
 	{ hostName :: HostName
 	, userName :: UserName
+	, sshPubKey :: Maybe SshPubKey
 	}
 	deriving (Eq, Read, Show)