diff --git a/LICENSE b/LICENSE new file mode 100644 --- /dev/null +++ b/LICENSE @@ -0,0 +1,30 @@ +Copyright (c) 2013, Romain Edelmann + +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above + copyright notice, this list of conditions and the following + disclaimer in the documentation and/or other materials provided + with the distribution. + + * Neither the name of Romain Edelmann nor the names of other + contributors may be used to endorse or promote products derived + from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main = defaultMain diff --git a/lists/diceware.txt b/lists/diceware.txt new file mode 100644 --- /dev/null +++ b/lists/diceware.txt @@ -0,0 +1,7776 @@ +a +a&p +a's +aa +aaa +aaaa +aaron +ab +aba +ababa +aback +abase +abash +abate +abbas +abbe +abbey +abbot +abbott +abc +abe +abed +abel +abet +abide +abject +ablaze +able +abner +abo +abode +abort 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+Graveler +Grimer +Growlithe +Gyarados +Haunter +Hitmonchan +Hitmonlee +Horsea +Hypno +Ivysaur +Jigglypuff +Jolteon +Jynx +Kabuto +Kabutops +Kadabra +Kakuna +Kangaskhan +Kingler +Koffing +Krabby +Lapras +Lickitung +Machamp +Machoke +Machop +Magikarp +Magmar +Magnemite +Magneton +Mankey +Marowak +Meowth +Metapod +Mew +Mewtwo +Moltres +Mr. Mime +Muk +Nidoking +Nidoqueen +Nidoran Male +Nidoran Female +Nidorina +Nidorino +Ninetales +Oddish +Omanyte +Omastar +Onix +Paras +Parasect +Persian +Pidgeot +Pidgeotto +Pidgey +Pikachu +Pinsir +Poliwag +Poliwhirl +Poliwrath +Ponyta +Porygon +Primeape +Psyduck +Raichu +Rapidash +Raticate +Rattata +Rhydon +Rhyhorn +Sandshrew +Sandslash +Scyther +Seadra +Seaking +Seel +Shellder +Slowbro +Slowpoke +Snorlax +Spearow +Squirtle +Starmie +Staryu +Tangela +Tauros +Tentacool +Tentacruel +Vaporeon +Venomoth +Venonat +Venusaur +Victreebel +Vileplume +Voltorb +Vulpix +Wartortle +Weedle +Weepinbell +Weezing +Wigglytuff +Zapdos +Zubat diff --git a/scat.cabal b/scat.cabal new file mode 100644 --- /dev/null +++ b/scat.cabal @@ -0,0 +1,67 @@ +-- Initial scat.cabal generated by cabal init. For further documentation, +-- see http://haskell.org/cabal/users-guide/ + +-- The name of the package. +name: scat + +-- The package version. See the Haskell package versioning policy (PVP) +-- for standards guiding when and how versions should be incremented. +-- http://www.haskell.org/haskellwiki/Package_versioning_policy +-- PVP summary: +-+------- breaking API changes +-- | | +----- non-breaking API additions +-- | | | +--- code changes with no API change +version: 1.0.0.0 + +-- A short (one-line) description of the package. +synopsis: Generates unique passwords for various websites from a single password. + +-- A longer description of the package. +-- description: + +-- The license under which the package is released. +license: BSD3 + +-- The file containing the license text. +license-file: LICENSE + +-- The package author(s). +author: Romain Edelmann + +-- An email address to which users can send suggestions, bug reports, and +-- patches. +maintainer: romain.edelmann@gmail.com + +homepage: https://github.com/redelmann/scat + +bug-reports: https://github.com/redelmann/scat/issues + +stability: experimental + +-- A copyright notice. +-- copyright: + +category: Password + +build-type: Simple + +-- Constraint on the version of Cabal needed to build this package. +cabal-version: >=1.8 + +data-dir: lists + +data-files: *.txt + +executable scat + -- .hs or .lhs file containing the Main module. + main-is: Scat.hs + + ghc-options: -Wall -O3 + + hs-source-dirs: src + + -- Modules included in this executable, other than Main. + other-modules: Scat.Builder, Scat.Schemas, Scat.Options, Scat.Utils.Permutation, Paths_scat + + -- Other library packages from which modules are imported. + build-depends: base ==4.5.*, scrypt ==0.3.*, bytestring ==0.9.*, optparse-applicative ==0.5.*, mtl ==2.1.*, vector ==0.10.*, ansi-terminal ==0.6.* + diff --git a/src/Scat.hs b/src/Scat.hs new file mode 100644 --- /dev/null +++ b/src/Scat.hs @@ -0,0 +1,162 @@ +{-# LANGUAGE OverloadedStrings, PatternGuards #-} + +-- | Password scatterer. +module Main (main) where + +import Data.Monoid +import Data.ByteString (ByteString) +import Data.ByteString (unpack) +import qualified Data.ByteString.Char8 as C +import System.IO +import System.Exit +import System.Console.ANSI +import Control.Exception +import Control.Monad.Reader +import Crypto.Scrypt + +import Scat.Schemas +import Scat.Builder +import Scat.Options + +-- | Generates the seed integer given a service, a password and a code. +scatter :: ByteString -> ByteString -> ByteString -> Integer +scatter k pw c = foldr (\ n s -> fromIntegral n + 256 * s) 0 $ + unpack $ unHash $ scrypt params (Salt k) (Pass $ pw <> c) + where + Just params = scryptParams 14 8 50 + +-- | Main type of the program. +type Scat a = ReaderT Options IO a + +-- | Input visibility. +data Visibility = Shown | Hidden | Erased + +-- | Should the input be echoed? +shouldShow :: Visibility -> Bool +shouldShow Shown = True +shouldShow Hidden = False +shouldShow Erased = True + +-- | Should the input be erased afterwards? +shouldErase :: Visibility -> Bool +shouldErase Shown = False +shouldErase Hidden = False +shouldErase Erased = True + +{- | Generates a password, given a input password, + a service name (category, website, etc.), + a code, and a password `Schema`. + + The parameters are specified as command line arguments. + The password can be read from @stdin@ if not already provided. -} +main :: IO () +main = getOptions >>= runReaderT scat + +-- | Main program. +scat :: Scat () +scat = do + k <- getService + s <- getSchema + pw <- getPassword + c <- getCode + printVerbose "Generated password:\n" + liftIO $ putStrLn $ evalBuilder s $ scatter k pw c + +-- | Prints, if the verbosity level allows it. +printVerbose :: String -> Scat () +printVerbose str = do + v <- fmap verbose ask + when v $ liftIO $ do + putStr str + hFlush stdout + +-- | Gets the password. +getPassword :: Scat ByteString +getPassword = do + mpw <- fmap password ask + case mpw of + -- Ask for the password on stdin. + Nothing -> do + c <- fmap confirm ask + if c + then getPassConfirm + else getPass + + -- Retrieve the password from the arguments. + Just st -> return $ C.pack st + where + getPass = prompt Hidden "Password: " + + getPassConfirm = do + a <- prompt Hidden "Password: " + b <- prompt Hidden "Confirm: " + if a == b + then return a + else do + printVerbose "Passwords do not match, please retry.\n" + getPassConfirm + +-- | Ask a for input on the command line, with the specified prompt. +prompt :: Visibility -> String -> Scat ByteString +prompt vis str = do + printVerbose str + old <- liftIO $ hGetEcho stdin + pw <- liftIO $ bracket_ + (hSetEcho stdin $ shouldShow vis) + (hSetEcho stdin old) + C.getLine + when (shouldErase vis) $ liftIO $ do + cursorUpLine 1 + cursorForward $ length str + clearFromCursorToScreenEnd + cursorDownLine 1 + unless (shouldShow vis) $ printVerbose "\n" + return pw + +-- | Gets the service. +getService :: Scat ByteString +getService = do + mk <- fmap service ask + case mk of + Just k -> return $ C.pack k + Nothing -> prompt Shown "Service: " + +-- | Gets the code. +getCode :: Scat ByteString +getCode = do + uc <- fmap useCode ask + if uc + then do + mc <- fmap code ask + case mc of + Just st -> return $ C.pack st + Nothing -> prompt Erased "Code: " + else return "" + +-- | Gets the schema to generate the new password. +getSchema :: Scat Schema +getSchema = do + name <- fmap schema ask + case name of + -- Safe, the default. + "safe" -> return safe + + -- Alphanumeric. + "alpha" -> return alphanumeric + + -- Paranoiac + "parano" -> return paranoiac + + -- PIN. + 'p' : 'i' : 'n' : xs | [(n, "")] <- reads xs -> return $ pin n + + -- Passphrase using Diceware's list. + "diceware" -> liftIO diceware + + -- Passphrase using Pokemons. + "pokemons" -> liftIO pokemons + + -- Unkown. + _ -> liftIO $ do + hPutStrLn stderr "Error: Unknown schema" + exitFailure diff --git a/src/Scat/Builder.hs b/src/Scat/Builder.hs new file mode 100644 --- /dev/null +++ b/src/Scat/Builder.hs @@ -0,0 +1,131 @@ + +{- | This modules defines `Builder`s, + which are simple parsers on `Integer`. -} +module Scat.Builder + ( + -- * Type + Builder + + -- * Execution + , runBuilder + , evalBuilder + , execBuilder + + -- * Primitives + + -- ** Numbers + , lessThan + , inRange + + -- ** Char + , digit + , letter + , lower + , upper + , ascii + , special + + -- * Combinators + , useup + , shuffle + , oneOf + , oneOfV + ) where + +import Data.Char (ord, chr) +import Data.Monoid +import Control.Applicative +import Control.Monad +import Control.Arrow (second) +import Data.Vector (Vector) +import qualified Data.Vector as V + +import Scat.Utils.Permutation + +-- | Parser acting on an `Integer`. +newtype Builder a = Builder + { runBuilder :: Integer -> (Integer, a) + -- ^ Runs the builder. + } + +-- | Evaluates the builder. +evalBuilder :: Builder a -> Integer -> a +evalBuilder b n = snd $ runBuilder b n + +-- | Executes the builder. +execBuilder :: Builder a -> Integer -> Integer +execBuilder b n = fst $ runBuilder b n + +instance Functor Builder where + fmap f (Builder g) = Builder $ second f . g + +instance Applicative Builder where + pure x = Builder (\ n -> (n, x)) + f <*> x = Builder $ \ n -> + let (n', g) = runBuilder f n + in fmap g $ runBuilder x n' + +instance Monad Builder where + return = pure + x >>= f = Builder $ \ n -> + let (n', v) = runBuilder x n + in runBuilder (f v) n' + +instance Monoid a => Monoid (Builder a) where + mempty = return mempty + mappend a b = mappend <$> a <*> b + +-- | Returns a positive integer less than `i`. +lessThan :: Integral a => a -> Builder a +lessThan i = Builder $ \ n -> second fromIntegral $ quotRem n $ fromIntegral i + +-- | Returns an integer between `a` and `b`, both inclusive. +inRange :: Integral a => (a, a) -> Builder a +inRange (a, b) = fmap (+ a) $ lessThan $ b + 1 - a + +-- | Returns a lower case letter. +lower :: Builder Char +lower = fmap (chr . (+ ord 'a')) $ lessThan 26 + +-- | Returns an upper case letter. +upper :: Builder Char +upper = fmap (chr . (+ ord 'A')) $ lessThan 26 + +-- | Returns an printable ascii char. +ascii :: Builder Char +ascii = fmap chr $ inRange (32, 126) + +-- | Returns a digit. +digit :: Builder Char +digit = fmap chr $ inRange (48, 57) + +-- | Returns a letter. +letter :: Builder Char +letter = join $ oneOf [upper, lower] + +-- | Returns a special character. +special :: Builder Char +special = oneOf "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" + +-- | Returns one element of the list. +oneOf :: [a] -> Builder a +oneOf [] = error "oneOf on empty list" +oneOf xs = fmap (xs !!) $ lessThan $ length xs + +-- | Returns on element of the vector. +oneOfV :: Vector a -> Builder a +oneOfV vect = fmap (vect V.!) $ lessThan $ V.length vect + +{- | Returns the results of the input builder + until the consummed integer is 0. -} +useup :: Builder a -> Builder [a] +useup b = Builder $ \ n -> + if n == 0 then (0, []) else runBuilder + ((:) <$> b <*> useup b) n + +-- | Shuffles the input list. +shuffle :: [a] -> Builder [a] +shuffle xs = fmap (perm xs) $ lessThan $ fact $ length xs + where + fact :: Int -> Int + fact n = product [1 .. n] diff --git a/src/Scat/Options.hs b/src/Scat/Options.hs new file mode 100644 --- /dev/null +++ b/src/Scat/Options.hs @@ -0,0 +1,85 @@ + +-- | Parses command-line arguments. +module Scat.Options + ( + -- * Type + Options + + -- * Accessors + , password + , service + , useCode + , code + , schema + , verbose + , confirm + + -- * Execution + , getOptions + ) where + +import Data.Monoid +import Options.Applicative + +-- | All program options. +data Options = Options + { password :: Maybe String + -- ^ Password, optionally provided. + , service :: Maybe String + -- ^ Service for which to generate the password. + , useCode :: Bool + -- ^ Indicates if extra code should be used. + , code :: Maybe String + -- ^ Extra code. + , schema :: String + -- ^ Name of the schema to use. + , verbose :: Bool + -- ^ Verbosity. If false, do not print anything but the generated password. + , confirm :: Bool + -- ^ Indicates if the password must be confirmed. + } + +-- | Parses the arguments from the command line. +getOptions :: IO Options +getOptions = execParser opts + where + opts = info (helper <*> options) + (fullDesc + <> progDesc "Safely generate passwords derived from a unique password and code." + <> header "scat - a password scatterer") + +-- | Option parser. +options :: Parser Options +options = Options + <$> optional + (strOption (short 'p' + <> long "password" + <> help "The password" + <> metavar "PASSWORD")) + <*> optional (strOption + (short 'S' + <> long "service" + <> help "Service associated (website, email address, ...)" + <> metavar "SERVICE")) + <*> flag True False + (long "nocode" + <> help "Indicates that extra code should be not be used") + <*> optional + (strOption (short 'x' + <> long "code" + <> help "The extra code to use" + <> metavar "CODE")) + <*> strOption + (short 's' + <> long "schema" + <> help "Schema for the generated password" + <> metavar "SCHEMA" + <> value "safe" + <> showDefault) + <*> flag True False + (long "silent" + <> help "Do not print anything but the generated password") + <*> switch + (short 'c' + <> long "confirmation" + <> help "Asks for password confirmation") diff --git a/src/Scat/Schemas.hs b/src/Scat/Schemas.hs new file mode 100644 --- /dev/null +++ b/src/Scat/Schemas.hs @@ -0,0 +1,101 @@ +{-# LANGUAGE BangPatterns #-} + +{- | This module defines `Schema`s, + which can generate passwords. -} +module Scat.Schemas + ( + -- * Type + Schema + + -- * Passwords + , safe + , alphanumeric + , paranoiac + + -- * PIN + , pin + + -- * Pass phrases + , pokemons + , diceware + ) where + +import Data.List (intercalate) +import Data.Vector (Vector) +import qualified Data.Vector as V +import Data.Monoid +import Control.Monad (replicateM) +import System.IO + +import Scat.Builder + +import Paths_scat + +-- | Password builder. +type Schema = Builder String + +-- | Paranoiac mode, entropy of 512 bits. +paranoiac :: Schema +paranoiac = replicateM 78 ascii + +{- | Generates a password of length 18, + containing upper case letters, + lower case letters, + digits and symbols. + Entropy of about 115 bits. -} +safe :: Schema +safe = do + nUpper <- inRange (2, 5) + nDigit <- inRange (2, 5) + nSpecial <- inRange (2, 5) + let nLower = 18 - nUpper - nSpecial - nDigit + uppers <- replicateM nUpper upper + digits <- replicateM nDigit digit + specials <- replicateM nSpecial special + lowers <- replicateM nLower lower + shuffle (uppers <> digits <> specials <> lowers) + +{- | Generates a password of length 18, + containing upper case letters, + lower case letters and + digits, but no symbols. + Entropy of about 104.2 bits. -} +alphanumeric :: Schema +alphanumeric = do + nUpper <- inRange (2, 5) + nDigit <- inRange (2, 5) + let nLower = 18 - nUpper - nDigit + uppers <- replicateM nUpper upper + digits <- replicateM nDigit digit + lowers <- replicateM nLower lower + shuffle (uppers <> digits <> lowers) + +{- | Generates a PIN number, of length `n`. + Entropy of about @3.32 * n@ bits. -} +pin :: Int -> Schema +pin n = replicateM n digit + +{- | Generates a password with 4 of the original Pokemons and their level. + Entropy of about 55.5 bits. -} +pokemons :: IO Schema +pokemons = fromFile "pokemons.txt" $ \ vect -> do + ps <- replicateM 4 $ oneOfV vect + ls <- replicateM 4 $ inRange (1, 100 :: Int) + let ss = zipWith (\ p l -> p ++ " " ++ show l) ps ls + return $ intercalate ", " ss + +{- | Generates a password with 5 words + from the Diceware list. + Entropy of about 64.6 bits. -} +diceware :: IO Schema +diceware = fromFile "diceware.txt" $ \ vect -> do + ws <- replicateM 5 $ oneOfV vect + return $ unwords ws + +-- | Feeds all lines of a file to a builder. +fromFile :: FilePath -> (Vector String -> Builder a) -> IO (Builder a) +fromFile fp bs = do + fp' <- getDataFileName fp + withFile fp' ReadMode $ \ h -> do + !vect <- fmap (V.fromList . lines) $ hGetContents h + return $ bs vect diff --git a/src/Scat/Utils/Permutation.hs b/src/Scat/Utils/Permutation.hs new file mode 100644 --- /dev/null +++ b/src/Scat/Utils/Permutation.hs @@ -0,0 +1,41 @@ + +{- Copyright (c) 2013 the authors listed at the following URL, and/or +the authors of referenced articles or incorporated external code: +http://en.literateprograms.org/Kth_permutation_(Haskell)?action=history&offset=20090329064426 + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Retrieved from: http://en.literateprograms.org/Kth_permutation_(Haskell)?oldid=16316 +-} + +{- | Permutations, taken from the + http://en.literateprograms.org/Kth_permutation_(Haskell) webpage. -} +module Scat.Utils.Permutation (perm) where + +rr :: Int -> Int -> [Int] +rr 0 _ = [] +rr n k = k `mod` n : rr (n - 1) (k `div` n) + +dfr :: [Int] -> [Int] +dfr = foldr (\ x rs -> x : [r + (if x <= r then 1 else 0) | r <- rs]) [] + +-- | List permutation. +perm :: [a] -> Int -> [a] +perm xs k = [xs !! i | i <- dfr (rr (length xs) k)]