path: root/kiki.hs

{-# LANGUAGE DoAndIfThenElse #-}
{-# LANGUAGE ViewPatterns  #-}
{-# LANGUAGE TupleSections #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE CPP #-}
module Main where

import Data.IORef
import Data.Binary
import Data.OpenPGP as OpenPGP
import qualified Data.ByteString.Lazy as L
import qualified Data.ByteString.Lazy.Char8 as Char8
import qualified Data.ByteString      as S
import Control.Monad
-- import qualified Text.Show.Pretty as PP
-- import Text.PrettyPrint as PP hiding ((<>))
import Data.List
import Data.OpenPGP.Util (verify,fingerprint)
import Data.Ord
import Data.Maybe
import Data.Bits
import qualified Data.Text as T
import Data.Text.Encoding
import qualified Codec.Binary.Base64 as Base64
import qualified Crypto.Hash.SHA256 as SHA256
import qualified Crypto.Hash.RIPEMD160 as RIPEMD160
-- import qualified Crypto.Types.PubKey.ECDSA as ECDSA
-- import qualified Crypto.PubKey.ECC.ECDSA as ECDSA

-- import Crypto.Random (newGenIO,SystemRandom)
import Data.ASN1.Types
import Data.ASN1.Encoding
import Data.ASN1.BinaryEncoding
import Control.Applicative
import System.Environment
import System.Exit
import System.IO (hPutStrLn,stderr)
import Data.Char
import Control.Arrow (first,second)
-- import Data.Traversable hiding (mapM,forM,sequence)
-- import qualified Data.Traversable as Traversable (mapM,forM,sequence)
-- import System.Console.CmdArgs
-- import System.Posix.Time
-- import Data.X509
import qualified Data.Map as Map
import DotLock
-- import Codec.Crypto.ECC.Base -- hecc package
-- import Text.Printf
import qualified CryptoCoins 
import LengthPrefixedBE
import Data.Binary.Put (putWord32be,runPut,putByteString)
import Data.Binary.Get (runGet)

import KeyRing
import Base58

-- {-# ANN module ("HLint: ignore Eta reduce"::String) #-}
-- {-# ANN module ("HLint: ignore Use camelCase"::String) #-}

-- instance Default S.ByteString where def = S.empty

warn str = hPutStrLn stderr str



{-
RSAPrivateKey ::= SEQUENCE {
  version           Version,
  modulus           INTEGER,  -- n
  publicExponent    INTEGER,  -- e
  privateExponent   INTEGER,  -- d
  prime1            INTEGER,  -- p
  prime2            INTEGER,  -- q
  exponent1         INTEGER,  -- d mod (p1) -- ?? d mod (p-1)
  exponent2         INTEGER,  -- d mod (q-1)
  coefficient       INTEGER,  -- (inverse of q) mod p
  otherPrimeInfos   OtherPrimeInfos OPTIONAL
}
-}

sshrsa :: Integer -> Integer -> Char8.ByteString
sshrsa e n = runPut $ do
    putWord32be 7
    putByteString "ssh-rsa"
    put (LengthPrefixedBE e)
    put (LengthPrefixedBE n)

decode_sshrsa :: Char8.ByteString -> Maybe RSAPublicKey
decode_sshrsa bs = do
    let (pre,bs1) = Char8.splitAt 11 bs
    guard $ pre == runPut (putWord32be 7 >> putByteString "ssh-rsa")
    let rsakey = flip runGet bs1 $ do
            LengthPrefixedBE e <- get
            LengthPrefixedBE n <- get
            return $ RSAKey (MPI n) (MPI e)
    return rsakey
        


{-
getPackets :: IO [Packet]
getPackets = do
    input <- L.getContents
    case decodeOrFail input of
        Right (_,_,Message pkts) -> return pkts
        Left  (_,_,_)            -> return []
-}


isCertificationSig (CertificationSignature {}) = True
isCertificationSig _                           = True

isSubkeySignature (SubkeySignature {}) = True
isSubkeySignature _                    = False

verifyBindings keys nonkeys = (top ++ filter isSubkeySignature embedded,othersigs)
 where
    verified = do
        sig <- signatures (Message nonkeys)
        let v = verify (Message keys) sig
        guard (not . null $ signatures_over v)
        return v
    (top,othersigs) = partition isSubkeySignature verified
    embedded = do
        sub <- top
        let sigover = signatures_over sub
            unhashed = sigover >>= unhashed_subpackets
            subsigs = mapMaybe backsig unhashed
            -- This should consist only of 0x19 values
            -- subtypes = map signature_type subsigs
        -- trace ("subtypes = "++show subtypes) (return ())
        -- trace ("issuers: "++show (map signature_issuer subsigs)) (return ())
        sig <- signatures (Message ([topkey sub,subkey sub]++subsigs))
        let v = verify (Message [subkey sub]) sig
        guard (not . null $ signatures_over v)
        return v

smallpr k = drop 24 $ fingerprint k


disjoint_fp ks = {- concatMap group2 $ -} transpose grouped
 where
    grouped    = groupBy samepr . sortBy (comparing smallpr) $ ks
    samepr a b = smallpr a == smallpr b

    {-
    -- useful for testing
    group2 :: [a] -> [[a]]
    group2 (x:y:ys) = [x,y]:group2 ys
    group2 [x]      = [[x]]
    group2 []       = []
    -}


getBindings ::
  [Packet]
  ->
    ( [([Packet],[SignatureOver])] -- ^ other signatures with key sets
                                   --   that were used for the verifications
    , [(Word8,
       (Packet, Packet), -- (topkey,subkey)
       [String],         -- usage flags
       [SignatureSubpacket], -- hashed data
       [Packet])] -- ^ binding signatures
    )
getBindings pkts = (sigs,bindings)
 where
    (sigs,concat->bindings) = unzip $ do
        let (keys,_) = partition isKey pkts
        keys <- disjoint_fp keys
        let (bs,sigs) = verifyBindings keys pkts
        return . ((keys,sigs),) $ do
            b <- bs -- trace ("sigs = "++show (map (map signature_issuer . signatures_over) sigs)) bs
            i <- map signature_issuer (signatures_over b)
            i <- maybeToList i
            who <- maybeToList $ find_key fingerprint (Message keys) i
            let (code,claimants) =
                    case () of
                        _ | who == topkey b -> (1,[])
                        _ | who == subkey b -> (2,[])
                        _                   -> (0,[who])
            let hashed = signatures_over b >>= hashed_subpackets
                kind = guard (code==1) >> hashed >>= maybeToList . usage
            return (code,(topkey b,subkey b), kind, hashed,claimants)

-- Returned data is simmilar to getBindings but the Word8 codes
-- are ORed together.
accBindings ::
  Bits t =>
  [(t, (Packet, Packet), [a], [a1], [a2])]
  -> [(t, (Packet, Packet), [a], [a1], [a2])]
accBindings bs = as
  where
    gs = groupBy samePair . sortBy (comparing bindingPair) $ bs
    as = map (foldl1 combine) gs
    bindingPair (_,p,_,_,_) = pub2 p
      where
        pub2 (a,b) = (pub a, pub b)
        pub a = fingerprint_material a
    samePair a b = bindingPair a == bindingPair b
    combine (ac,p,akind,ahashed,aclaimaints)
            (bc,_,bkind,bhashed,bclaimaints)
        = (ac .|. bc,p,akind++bkind,ahashed++bhashed,aclaimaints++bclaimaints)


fpmatch grip key =
    (==) Nothing
         (fmap (backend (fingerprint key)) grip >>= guard . not)
 where
    backend xs ys = and $ zipWith (==) (reverse xs) (reverse ys)

listKeys pkts = listKeysFiltered [] pkts

{-
ecc_curve k = printf "%x" num :: String
 where unmpi (MPI num) = num
       num =  maybe 0 unmpi $ lookup 'c' (key k)
-}

listKeysFiltered grips pkts = do
    let (certs,bs) = getBindings pkts
        as = accBindings bs
        defaultkind (k:_) hs = k
        defaultkind []    hs = fromMaybe "subkey"
                                     ( listToMaybe
                                     . mapMaybe (fmap usageString . keyflags)
                                     $ hs)
        kinds = map (\(_,_,k,h,_)->defaultkind k h) as
        kindwidth = maximum $ map length kinds
        kindcol = min 20 kindwidth
        code (c,(m,s),_,_,_) = (fingerprint_material m,-c)
        ownerkey (_,(a,_),_,_,_) = a
        sameMaster (ownerkey->a) (ownerkey->b) = fingerprint_material a==fingerprint_material b
        matchgrip _ | null grips = True
        matchgrip ((code,(top,sub), kind, hashed,claimants):_) | any (flip fpmatch top . Just) grips = True
        matchgrip _ = False
        gs = filter matchgrip $ groupBy sameMaster (sortBy (comparing code) as)
        showsigs claimants = map (\k -> "      " ++ "^ signed: " ++ fingerprint k) claimants
    subs@((_,(top,_),_,_,_):_) <- gs
    let subkeys = do
            (code,(top,sub), kind, hashed,claimants) <- subs
            let ar = case code of
                        0 -> " ??? "
                        1 -> " --> "
                        2 -> " <-- "
                        3 -> " <-> "
                formkind = take kindcol $ defaultkind kind hashed ++ repeat ' '
                -- torhash = fromMaybe "" $ derToBase32 <$> derRSA sub
                (netid,kind') = maybe (0x0,"bitcoin")
                                      (\n->(CryptoCoins.publicByteFromName n,n))
                                      $ listToMaybe kind
            unlines $
                concat  [ " "
                        -- , grip top
                        , ar
                        , formkind
                        , " "
                        , fingerprint sub
                        -- , " " ++ torhash
                        -- , " " ++ (concatMap (printf "%02X") $ S.unpack (ecc_curve sub))
                        ] -- ++ ppShow hashed
                    : if isCryptoCoinKey sub
                        -- then ("      " ++ "B⃦ " ++ bitcoinAddress sub) : showsigs claimants
                        -- then ("      " ++ "BTC " ++ bitcoinAddress sub) : showsigs claimants
                        then ("      " ++ "¢ "++kind'++":" ++ bitcoinAddress netid sub) : showsigs claimants
                        else showsigs claimants
        torkeys = do
            (code,(top,sub), kind, hashed,claimants) <- subs
            guard ("tor" `elem` kind)
            guard (code .&. 0x2 /= 0)
            maybeToList $ derToBase32 <$> derRSA sub
        uid = {- fromMaybe "" . listToMaybe $ -} do
            (keys,sigs) <- certs
            sig <- sigs
            guard (isCertificationSig sig)
            guard (topkey sig == top)
            let issuers = do
                    sig_over <- signatures_over sig
                    i <- maybeToList $ signature_issuer sig_over
                    maybeToList $ find_key (matchpr i) (Message keys) (reverse (take 16 (reverse i)))
                (primary,secondary) = partition (==top) issuers

            -- trace ("PRIMARY: "++show (map fingerprint primary)) $ return ()
            -- trace ("SECONDARY: "++show (map fingerprint secondary)) $ return ()
            guard (not (null primary))

            let UserIDPacket uid = user_id sig
                parsed = parseUID uid
                ar = maybe " --> " (const " <-> ") $ do
                        guard (uid_topdomain parsed == "onion" )
                        guard ( uid_realname parsed `elem` ["","Anonymous"])
                        guard (     uid_user parsed == "root" )
                        let subdom0 = L.fromChunks [encodeUtf8 (uid_subdomain parsed)]
                            len = L.length subdom0
                            subdom = Char8.unpack subdom0
                            match = (==subdom) . take (fromIntegral len)
                        guard (len >= 16)
                        listToMaybe $ filter match torkeys
            unlines $  (" " ++ ar ++ "@" ++ " " ++ uid_full parsed) : showsigs secondary
        -- (_,sigs) = unzip certs
    "master-key " ++ fingerprint top ++ "\n" ++ uid ++"  ...\n" ++ subkeys ++ "\n"




{-
modifyUID (UserIDPacket str) = UserIDPacket str'
 where
    (fstname,rst) = break (==' ') str
    str' = mod fstname ++ rst
    mod "Bob" = "Bob Slacking"
    mod x     = x
modifyUID other              = other
-}



-- type TimeStamp = Word32


readPublicKey :: Char8.ByteString -> RSAPublicKey
readPublicKey bs = fromMaybe er $ do
    let (pre,bs1) = Char8.splitAt 7 bs
    guard $ pre == "ssh-rsa"
    let (sp,bs2) = Char8.span isSpace bs1
    guard $ not (Char8.null sp)
    bs3 <- listToMaybe $ Char8.words bs2
    qq <- L.pack `fmap` Base64.decode (Char8.unpack bs3)
    decode_sshrsa qq
 where
    er = error "Unsupported key format"

{-
getPassphrase cmd =
         case passphrase_fd cmd of
                Just fd -> do pwh <- fdToHandle (toEnum fd)
                              fmap trimCR $ S.hGetContents pwh
                Nothing -> return ""
-}


#define HOMEOPTION (def &= explicit &= name "homedir" &= typDir )


toLast f []  = []
toLast f [x] = [f x]
toLast f (x:xs) = x : toLast f xs

partitionStaticArguments specs args = psa args
 where
    smap = Map.fromList specs
    psa [] = ([],[])
    psa (a:as) = 
      case Map.lookup a smap of
        Nothing -> second (a:) $ psa as
        Just n  -> first ((a:take n as):) $ psa (drop n as)

show_wk secring_file grip db = do
    let sec_db = Map.filter gripmatch db
        gripmatch (KeyData p _ _ _) = 
            Map.member secring_file (locations p)
        Message sec = flattenKeys False sec_db
    putStrLn $ listKeysFiltered (maybeToList grip) sec

show_all db = do
    let Message packets = flattenKeys True db
    putStrLn $ listKeys packets

show_whose_key input_key db = 
    flip (maybe $ return ()) input_key $ \input_key -> do
    let ks = whoseKey input_key db
    case ks of
        [KeyData k _ uids _] -> do
            putStrLn $ fingerprint (packet k)
            mapM_ putStrLn $ Map.keys uids
        (_:_) -> error "ambiguous"
        [] -> return ()

show_pem keyspec wkgrip db = do
    let s = parseSpec wkgrip keyspec
    flip (maybe . void $ warn (keyspec ++ ": not found"))
         (selectPublicKey s db)
         $ \k -> do
    let rsa = pkcs8 . fromJust $ rsaKeyFromPacket k
        der = encodeASN1 DER (toASN1 rsa [])
        qq  = Base64.encode (L.unpack der)
    putStrLn $
        writePEM "PUBLIC KEY" qq -- ("TODO "++show keyspec)

show_ssh keyspec wkgrip db = do
    let s = parseSpec wkgrip keyspec
    flip (maybe . void $ warn (keyspec ++ ": not found")) 
         (selectPublicKey s db)
         $ \k -> do
    let Just (RSAKey (MPI n) (MPI e)) = rsaKeyFromPacket k
        bs = sshrsa e n
        blob = Base64.encode (L.unpack bs)
    putStrLn $ "ssh-rsa " ++ blob

show_key keyspec wkgrip db = do
    let s = parseSpec "" keyspec
    let ps = do 
            (_,k) <- filterMatches (fst s) (Map.toList db)
            mp <- flattenTop "" True k
            return $ packet mp
    -- putStrLn $ "show key " ++ show s
    putStrLn $ listKeys ps

show_wip keyspec wkgrip db = do
    let s = parseSpec wkgrip keyspec
    flip (maybe $ void (warn (keyspec ++ ": not found")))
         (selectSecretKey s db)
         $ \k -> do
    let nwb = maybe 0x80 CryptoCoins.secretByteFromName $ snd s
    putStrLn $ walletImportFormat nwb k


{-
applyCurve curve x = x*x*x + x*a + b where (a,b)=(geta curve,getb curve)

secp256k1_oid = [1,3,132,0,10]
secp256k1_curve = ECi l a b p r
 where
    -- y² = x³ + 7 (mod p)
    p = 0x0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F 
    a = 0
    b = 7
    -- group order  (also order of base point G)
    r = n
    n = 0x0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 
    -- cofactor
    h = 1 
    -- bit length
    l = 256

secp256k1_G = ECPa secp256k1_curve 
                0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798
                0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8 
    {-
    The base point G in compressed form is:

        G = 02 79BE667E F9DCBBAC 55A06295 CE870B07 029BFCDB 2DCE28D9 59F2815B 16F81798 

    and in uncompressed form is:

        G = 04 79BE667E F9DCBBAC 55A06295 CE870B07 029BFCDB 2DCE28D9 59F2815B 16F81798
               483ADA77 26A3C465 5DA4FBFC 0E1108A8 FD17B448 A6855419 9C47D08F FB10D4B8 
    -}
-}


cannonical_eckey x y = 0x4:pad32(numToBytes x) ++ pad32(numToBytes y) :: [Word8]
 where
  numToBytes n = reverse $ unfoldr getbyte n
    where
        getbyte d = do
            guard (d/=0)
            let (q,b) = d `divMod` 256
            return (fromIntegral b,q)
  pad32 xs = replicate zlen 0 ++ xs
    where
        zlen = 32 - length xs
    

bitcoinAddress network_id k = address
    where
            Just (MPI x) = lookup 'x' (key k)
            Just (MPI y) = lookup 'y' (key k)
            pub = cannonical_eckey x y
            hash = S.cons network_id . RIPEMD160.hash . SHA256.hash . S.pack $  pub
            address = base58_encode hash

-- gpg supported ECDSA curve: 2A8648CE3D030107
-- 2A 86 48 CE 3D 03 01 07 
-- 1,2,134,72,206,61,3,1,7
--  6*128+0x48 840
--  0x4e*128+0x3d 10045
-- 1.2.840.10045.3.1.7  --> NIST P-256
--
    

{-
onionName :: KeyData -> (SockAddr,L.ByteString)
onionName kd = (addr,name)
 where
    (addr,(name:_,_)) = getHostnames kd
-}

whoseKey :: RSAPublicKey -> KeyDB -> [KeyData]
whoseKey rsakey db = filter matchkey (Map.elems db)
 where
    matchkey (KeyData k _ _ subs) =
        any (ismatch k) $ Map.elems subs

    ismatch k (SubKey mp sigs) = 
          Just rsakey == rsaKeyFromPacket (packet mp)
       && any (check (packet k) (packet mp)) sigs

    check k sub (sig,_) = not . null $ do
        s <- signatures . Message $ [k,sub,packet sig]
        fw <- signatures_over $ verify (Message [k]) s
        subsig <- mapMaybe backsig (unhashed_subpackets $ packet sig)
        subsig_so <- signatures (Message [k,sub,subsig])
        guard (  isSubkeySignature subsig_so
              && isSameKey (topkey subsig_so) k
              && isSameKey (subkey subsig_so) sub )
        s2 <- signatures . Message $ [k,sub,subsig]
        signatures_over $ verify (Message [sub]) s2


kiki_usage = putStr . unlines $
        ["kiki - a pgp key editing utility"
        ,""
        ,"kiki [OPTIONS]"
        ,""
        ,"     kiki merges a set of keyring files into a combined database and then"
        ,"     uses the database to update the files so that they have the most complete"
        ,"     information."
        ,""
        ,"     The files pubring.gpg and subring.gpg in the directory specified by the "
        ,"     --homedir option are implicitly included in the keyring set."
        ,""
        ,"     kiki can also import or export secret subkeys by using the --keypairs option."
        ,""
        ,"     Subkeys that are imported with kiki are given an annotation \"usage@\" which"
        ,"     indicates what the key is for.  This tag can be used as a SPEC to select a"
        ,"     particular key.  Master keys may be specified by using fingerprints or by"
        ,"     specifying a substring of an associated UID."
        ,""
        ,"Flags:"
        ,"     --homedir DIR"
        ,"                Where to find the the files secring.gpg and pubring.gpg. The "
        ,"                default location is taken from the environment variable "
        ,"                GNUPGHOME."
        ,""
        ,"     --passphrase-fd N"
        ,"                Read passphrase from the given file descriptor."
        ,""
        ,"     --import   Add master keys to pubring.gpg.  Without this option, only UID"
        ,"                and subkey data is updated. "
        ,""
        ,"     --import-if-authentic"
        ,"                Add signed master keys to pubring.gpg.  Like --import except that"
        ,"                only keys with signatures from the working key (--show-wk) are"
        ,"                imported."
        ,""
        ,"     --autosign Sign all cross-certified tor-style UIDs."
        ,"                A tor-style UID is of the form:"
        ,"                        Anonymous <root@HOSTNAME.onion>"
        ,"                It is considered cross certified if there exists a cross-certified"
        ,"                'tor' subkey corresponding to the address HOSTNAME.onion."
        ,""
        ,"Merging:"
        ,"     --keyrings FILE FILE..."
        ,"                Provide keyring files other than the implicit secring.gpg and"
        ,"                pubring.gpg in the --homedir.  This option is implicit unless"
        ,"                --keypairs or --wallets is used."
        ,""
        ,"     --wallets  FILE FILE..."
        ,"                Provide wallet files with secret crypto-coin keys in Wallet"
        ,"                Import Format.  The keys will be treated as subkeys of your"
        ,"                current working key (the one shown by --show-wk)."
        ,""
        ,"     --keypairs KEYSPEC KEYSPEC..."
        ,"                Each KEYSPEC specifies that a key should match the content and"
        ,"                timestamp of an external PKCS #1 private RSA key file."
        ,"                "
        ,"                KEYSPEC ::= SPEC=FILE{CMD} "
        ,""
        ,"                If neither SPEC or FILE match any keys, then the CMD will be "
        ,"                executed in order to create the FILE."
        ,""
        ,"Output:"
        ,"     --show-wk  Show fingerprints for the working key (which will be used to"
        ,"                make signatures) and all its subkeys and UID."
        ,""
        ,"     --show-key SPEC"
        ,"                Show fingerprints for the specified key and all its subkeys"
        ,"                and UID."
        ,""
        ,"     --show-all Show fingerprints and UIDs and usage tags for all known keys."
        ,""
        ,"     --show-whose-key"
        ,"                Shows the fingerprint and UIDs of the key that owns the one that"
        ,"                is input on stdin in ssh-rsa format."
        ,""
        ,"     --show-pem SPEC"
        ,"                Outputs the PKCS #8 public key corresponding to SPEC."
        ,""
        ,"     --show-ssh SPEC"
        ,"                Outputs the ssh-rsa blob for the specified public key."
        ,""
        ,"     --show-wip SPEC"
        ,"                Outputs the secret crypto-coin key in Wallet Input Format."
        ,""
        ,"     --help     Shows this help screen."
        ]

main = do
    dotlock_init
    {-
    args <- cmdArgs $ modes
        [ Cross_Merge HOMEOPTION
              (def &= opt ("passphrase"::String)
                &= typ "FD"
                &= (help . concat)  ["file descriptor from "
                                    ,"which to read passphrase"])
              (def &= args &= typFile)
            &= help "Merge multiple secret keyrings to stdout."
        ]
        &= program "kiki"
        &= summary "kiki - a pgp key editing utility"
    doCmd args
    -}
    args_raw <- getArgs
    let (args,trail1) = break (=="--") args_raw
        trail = drop 1 trail1
        (sargs,margs) = 
                (sargs, foldl' (\m (k:xs)->Map.alter (appendArgs k xs) k m)
                               Map.empty
                               gargs)
                    where (sargs,vargs) = partitionStaticArguments sargspec args
                          sargspec = [ ("--homedir",1)
                                     , ("--passphrase-fd",1)
                                     , ("--import",0)
                                     , ("--autosign",0)
                                     , ("--import-if-authentic",0)
                                     , ("--show-wk",0)
                                     , ("--show-all",0)
                                     , ("--show-whose-key",0)
                                     , ("--show-key",1)
                                     , ("--show-pem",1)
                                     , ("--show-ssh",1)
                                     , ("--show-wip",1)
                                     , ("--help",0)
                                     ]
                          argspec = map fst sargspec ++ ["--keyrings"
                                                        ,"--keypairs"
                                                        ,"--wallets"
                                                        ,"--hosts"] 
                                        -- "--bitcoin-keypairs"
                                        -- Disabled.  We shouldn't accept private key
                                        -- data on the command line.
                          args' = if map (take 1) (take 1 vargs) == ["-"]
                                    then vargs
                                    else "--keyrings":vargs
                          gargs = (sargs ++)
                                  . toLast (++trail) 
                                  . groupBy (\_ s-> take 1 s /= "-")
                                  $ args'
                          appendArgs k xs opt = 
                            if k `elem` argspec
                              then Just . maybe xs (++xs) $ opt
                              else error . unlines $ [ "unrecognized option "++k
                                                     , "Use --help for usage." ]
    -- putStrLn $ "margs = " ++ show (Map.assocs margs)
    unkeysRef <- newIORef Map.empty
    pwRef <- newIORef Nothing
    let keypairs0 =
            flip map (fromMaybe [] $ Map.lookup "--keypairs" margs) $ \specfile -> do
                let (spec,efilecmd) = break (=='=') specfile
                guard $ take 1 efilecmd=="="
                let filecmd = drop 1 efilecmd
                let (file,bcmdb0) = break (=='{') filecmd
                    bcmdb = if null bcmdb0 then "{}" else bcmdb0
                guard $ take 1 bcmdb=="{"
                let bdmcb = (dropWhile isSpace . reverse) bcmdb
                guard $ take 1 bdmcb == "}"
                let cmd = (drop 1 . reverse . drop 1) bdmcb
                Just (spec,file,cmd)
        {-
        publics =
            flip map (fromMaybe [] $ Map.lookup "--public" margs) $ \specfile -> do
                let (spec,efile) = break (=='=') specfile
                guard $ take 1 efile=="="
                let file= drop 1 efile
                Just (spec,file)
        -}
        keyrings_ = fromMaybe [] $ Map.lookup "--keyrings" margs
        wallets   = fromMaybe [] $ Map.lookup "--wallets" margs
        passphrase_fd = concat <$> Map.lookup "--passphrase-fd" margs

    when (any isNothing keypairs0) $ do
        warn "syntax error"
        exitFailure

    input_key <- maybe (return Nothing)
                       (const $ fmap (Just . readPublicKey) Char8.getContents) 
                    $ Map.lookup "--show-whose-key" margs

    let keypairs = catMaybes keypairs0

    {-
    putStrLn $ "wallets = "++show wallets
    putStrLn $ "keypairs = "++show keypairs
    putStrLn $ "keyrings = "++show keyrings_
    putStrLn $ "publics  = "++show publics
    -}

    let homespec = join . take 1 <$> Map.lookup "--homedir" margs
        passfd = fmap (FileDesc . read) passphrase_fd
        pems = flip map keypairs 
                $ \(usage,path,cmd) ->
                    let cmd' = guard (not $ null cmd) >> return cmd
                    in (ArgFile path, (MutableRef cmd', PEMFile usage)) 
        walts = map (\fname -> (ArgFile fname, (MutableRef Nothing, WalletFile)))
                    wallets
        rings = map (\fname -> (ArgFile fname, (MutableRef Nothing, KeyRingFile passfd)))
                    keyrings_
        hosts = maybe [] (map decorate) $ Map.lookup "--hosts" margs
                    where decorate fname = (ArgFile fname, (MutableRef Nothing, Hosts))
        importStyle = maybe (\_ _ -> subkeysOnly)
                            (\f rt kd -> f rt kd >> importPublic)
                        $ mplus import_f importifauth_f
            where
                import_f = do Map.lookup "--import" margs
                              return $ \rt kd -> Just ()
                importifauth_f = do Map.lookup "--import-if-authentic" margs
                                    return guardAuthentic
        kikiOp = KeyRingOperation
            { kFiles = Map.fromList $
                [ ( HomeSec, (MutableRef Nothing, KeyRingFile passfd)  )
                , ( HomePub, (MutableRef Nothing, KeyRingFile Nothing) )
                ]
                ++ rings
                ++ pems
                ++ walts
                ++ hosts
            , kImports = Map.fromList [ ( HomePub, importStyle ) ]
            , kManip = maybe noManip (const doAutosign) $ Map.lookup "--autosign" margs
            , homeSpec = homespec
            }

    KikiResult rt report <- runKeyRing kikiOp 

    case rt of
      KikiSuccess rt -> do -- interpret --show-* commands.
            let grip = rtGrip rt
            let shspec = Map.fromList [("--show-wk", const $ show_wk (rtSecring rt) grip)
                                      ,("--show-all",const show_all)
                                      ,("--show-whose-key", const $ show_whose_key input_key)
                                      ,("--show-key",\[x] -> show_key x $ fromMaybe "" grip)
                                      ,("--show-pem",\[x] -> show_pem x $ fromMaybe "" grip)
                                      ,("--show-ssh",\[x] -> show_ssh x $ fromMaybe "" grip)
                                      ,("--show-wip",\[x] -> show_wip x $ fromMaybe "" grip)
                                      ,("--help", \_ _ ->kiki_usage)]
                shargs = mapMaybe (\(x:xs) -> (,xs) <$> Map.lookup x shspec) sargs

            forM_ shargs $ \(cmd,args) -> cmd args (rtKeyDB rt)
      e -> putStrLn $ errorString e

    forM_ report $ \(fname,act) -> do
        putStrLn $ fname ++ ": " ++ reportString act
 where

    doAutosign rt kd@(KeyData k ksigs umap submap) = ops
     where
        ops = map (\u -> InducerSignature u []) us
        us = filter torStyle $ Map.keys umap
        torbindings = getTorKeys (map packet $ flattenTop "" True kd)
        torStyle str = and [ uid_topdomain parsed == "onion"
                            , uid_realname parsed `elem` ["","Anonymous"]
                            , uid_user parsed == "root"
                            , fmap (match . fst) (lookup (packet k) torbindings)
                                == Just True ]
                      where parsed = parseUID str
                            match =  (==subdom) . take (fromIntegral len)
                            subdom0 = L.fromChunks [encodeUtf8 (uid_subdomain parsed)]
                            subdom = Char8.unpack subdom0
                            len = T.length (uid_subdomain parsed)

    getTorKeys pub = do
        xs <- groupBindings pub
        (_,(top,sub),us,_,_) <- xs
        guard ("tor" `elem` us)
        let torhash = fromMaybe "" $ derToBase32 <$> derRSA sub
        return (top,(torhash,sub))

isSameKey a b = sort (key apub) == sort (key bpub)
 where
    apub = secretToPublic a
    bpub = secretToPublic b



groupBindings pub =
        let (_,bindings) = getBindings pub
            bindings' = accBindings bindings
            code (c,(m,s),_,_,_) = (fingerprint_material m,-c)
            ownerkey (_,(a,_),_,_,_) = a
            sameMaster (ownerkey->a) (ownerkey->b) = fingerprint_material a==fingerprint_material b
            -- matchgrip ((code,(top,sub), kind, hashed,claimants):_) | fpmatch grip top = True
            -- matchgrip _ = False
            gs = {- filter matchgrip $ -} groupBy sameMaster (sortBy (comparing code) bindings')
        in gs



{-
makeTorUID g timestamp wkun keyflags topkey torkey = uid:signatures_over sig
 where
    torhash sub = fromMaybe "" $ derToBase32 <$> derRSA sub
    s = "Anonymous <root@" ++ take 16 (torhash torkey) ++ ".onion>"
    uid = UserIDPacket s
    sig = fst $ torsig g topkey wkun uid timestamp keyflags
-}