qnap-decrypt (empty) → 0.3.0

raw patch · 33 files changed

+674/−0 lines, 33 filesdep +HUnitdep +basedep +binarysetup-changedbinary-added

Dependencies added: HUnit, base, binary, bytestring, cipher-aes128, conduit, conduit-extra, crypto-api, directory, filepath, hspec, optparse-applicative, qnap-decrypt, streaming-commons, tagged, temporary, utf8-string

Files

• ChangeLog.md +5/−0
• LICENSE +30/−0
• README.md +38/−0
• Setup.hs +2/−0
• app/Main.hs +227/−0
• qnap-decrypt.cabal +115/−0
• src/Crypto/QNAP.hs +143/−0
• src/Data/Conduit/Crypto.hs +66/−0
• test/Spec.hs +36/−0
• test/encrypted/c0 binary
• test/encrypted/c1 binary
• test/encrypted/c2 binary
• test/encrypted/c3 binary
• test/encrypted/c4 binary
• test/encrypted/c5 binary
• test/encrypted/u0 binary
• test/encrypted/u1 binary
• test/encrypted/u2 binary
• test/encrypted/u3 binary
• test/encrypted/u4 binary
• test/encrypted/u5 binary
• test/reference/c0 +1/−0
• test/reference/c1 +1/−0
• test/reference/c2 +1/−0
• test/reference/c3 +1/−0
• test/reference/c4 +1/−0
• test/reference/c5 +1/−0
• test/reference/u0 +1/−0
• test/reference/u1 +1/−0
• test/reference/u2 +1/−0
• test/reference/u3 +1/−0
• test/reference/u4 +1/−0
• test/reference/u5 +1/−0

@@ -0,0 +1,5 @@+# Changelog for qnap-decrypt++## 0.3.0 -- 2018-04-28++* Initial release

@@ -0,0 +1,30 @@+Copyright ALeX Kazik (c) 2018++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 Author name here 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.

@@ -0,0 +1,38 @@+qnap-decrypt+============++A program (and library) to decrypt files encoded by QNAP's Hybrid Backup Sync.+++Installation+------------++1. [Install Stack](https://docs.haskellstack.org/en/stable/install_and_upgrade/)+2. Download/clone this repo+3. `cd` into it+4. `stack install`++    - You may have to add the path of the installation to your PATH or always use the full path+++Usage+-----++The program supports four modes:++- Decrypt a single file or+- Decrypt a full directory tree+- Replace the decrypted file(s) or+- Save the file/directory to a new file/directory++Example:++```+qnap-decrypt file -p password -s source.file -d target.file+```+++Thanks+------++- [Mikiya83](https://github.com/Mikiya83) for hbs_decipher which I used to learn about the file structure

@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain

@@ -0,0 +1,227 @@+{-# LANGUAGE RecordWildCards #-}++module Main+  ( main+  ) where++import           Control.Exception   (displayException)+import           Control.Monad       (void, when)+import           Data.Semigroup      ((<>))+import qualified Options.Applicative as O+import           System.Directory    (createDirectoryIfMissing, doesDirectoryExist, doesFileExist, listDirectory,+                                      renameFile)+import           System.FilePath     (takeDirectory, takeFileName, (</>))+import           System.IO           (hClose, hPutStrLn, openBinaryTempFile, stderr)++import           Crypto.QNAP         (decrypt)++data Command+  = Command+    { commandSingleFile  :: Bool+    , commandInline      :: Bool+    , commandPassword    :: String+    , commandSource      :: String+    , commandDestination :: String+    , commandVerbose     :: Bool+    }+  deriving (Show)++command :: O.Parser Command+command =+  O.hsubparser $+    O.command+      "dir"+      ( O.info+          parseDirectory+          (O.progDesc "decrypt a directory")+      ) <>+    O.command+      "dir-in-place"+        ( O.info+            parseDirectoryInPlace+            (O.progDesc "decrypt a directory in place")+        ) <>+    O.command+      "file"+        ( O.info+            parseFile+            (O.progDesc "decrypt a file")+        ) <>+    O.command+      "file-in-place"+        ( O.info+            parseFileInPlace+            (O.progDesc "decrypt a file in place")+        )+  where+    parseDirectory =+      Command False False+        <$> O.strOption+          (  O.long "password"+          <> O.short 'p'+          <> O.metavar "PASS"+          <> O.help "Password"+          )+        <*> O.strOption+          (  O.long "source"+          <> O.short 's'+          <> O.metavar "SRC"+          <> O.help "Directory to be decrypted"+          )+        <*> O.strOption+          (  O.long "destination"+          <> O.short 'd'+          <> O.metavar "DST"+          <> O.help "Directory to store the decrypted files"+          )+        <*> O.switch+          (  O.long "verbose"+          <> O.short 'v'+          <> O.help "Print all decrypted files"+          )+    parseDirectoryInPlace =+      Command False True+        <$> O.strOption+          (  O.long "password"+          <> O.short 'p'+          <> O.metavar "PASS"+          <> O.help "Password"+          )+        <*> O.strOption+          (  O.long "directory"+          <> O.short 'd'+          <> O.metavar "DIR"+          <> O.help "Directory to be decrypted in place"+          )+        <*> pure ""+        <*> O.switch+          (  O.long "verbose"+          <> O.short 'v'+          <> O.help "Print all decrypted files"+          )+    parseFile =+      Command True False+        <$> O.strOption+          (  O.long "password"+          <> O.short 'p'+          <> O.metavar "PASS"+          <> O.help "Password"+          )+        <*> O.strOption+          (  O.long "source"+          <> O.short 's'+          <> O.metavar "SRC"+          <> O.help "File to be decrypted"+          )+        <*> O.strOption+          (  O.long "destination"+          <> O.short 'd'+          <> O.metavar "DST"+          <> O.help "File/directory to store the decrypted file"+          )+        <*> O.switch+          (  O.long "verbose"+          <> O.short 'v'+          <> O.help "Print all decrypted files"+          )+    parseFileInPlace =+      Command True True+        <$> O.strOption+          (  O.long "password"+          <> O.short 'p'+          <> O.metavar "PASS"+          <> O.help "Password"+          )+        <*> O.strOption+          (  O.long "file"+          <> O.short 'f'+          <> O.metavar "FILE"+          <> O.help "File to be decrypted in place"+          )+        <*> pure ""+        <*> O.switch+          (  O.long "verbose"+          <> O.short 'v'+          <> O.help "Print all decrypted files"+          )++main :: IO ()+main = do+  Command{..} <-+    O.execParser $+      O.info (command O.<**> O.helper)+        (  O.fullDesc+        <> O.progDesc "Decrypt QNAP files/folders"+        <> O.footer "WARNING: The target file/directory will be overwritten"+        )+  case (commandSingleFile, commandInline) of+    (False, False) -> cmdDir commandVerbose commandPassword [(commandSource, commandDestination)]+    (False, True)  -> cmdDirInPlace commandVerbose commandPassword [commandSource]+    (True, False)  -> cmdFile commandVerbose commandPassword commandSource commandDestination+    (True, True)   -> cmdFileInPlace commandVerbose commandPassword commandSource++cmdDir :: Bool -> String -> [(FilePath, FilePath)] -> IO ()+cmdDir verbose pass = go+  where+    go [] = return ()+    go ((src, dst):stack) = do+      isFile <- doesFileExist src+      isDir <- doesDirectoryExist src+      case (isFile, isDir) of+        (True, False) -> do+          cmdFile verbose pass src dst+          go stack+        (False, True) -> do+          files <- listDirectory src+          createDirectoryIfMissing True dst+          go (map (\file -> (src </> file, dst </> file)) files ++ stack)+        _ ->+          return ()++cmdDirInPlace :: Bool -> String -> [FilePath] -> IO ()+cmdDirInPlace verbose pass = go+  where+    go [] = return ()+    go (entry:stack) = do+      isFile <- doesFileExist entry+      isDir <- doesDirectoryExist entry+      case (isFile, isDir) of+        (True, False) -> do+          cmdFileInPlace verbose pass entry+          go stack+        (False, True) -> do+          files <- listDirectory entry+          go (map (entry </>) files ++ stack)+        _ ->+          return ()++cmdFile :: Bool -> String -> FilePath -> FilePath -> IO ()+cmdFile verbose pass src dst = do+  dstIsDir <- doesDirectoryExist dst+  let+    dst' =+      if dstIsDir+        then dst </> takeFileName src+        else dst+  void $ decrypt' verbose pass src dst'++cmdFileInPlace :: Bool -> String -> FilePath -> IO ()+cmdFileInPlace verbose pass file = do+  (tempFileName, tmpHandle) <- openBinaryTempFile (takeDirectory file) (takeFileName file ++ ".temp.qnap")+  hClose tmpHandle+  success <- decrypt' verbose pass file tempFileName+  -- the decrypt removes the output file in case of an error -> no need to do it here also+  when success $+    renameFile tempFileName file++decrypt' :: Bool -> String -> FilePath -> FilePath -> IO Bool+decrypt' verbose pass src dst = do+  result <- decrypt pass src dst+  case result of+    Just err -> do+      hPutStrLn stderr (src ++ ": " ++ displayException err)+      return False+    Nothing -> do+      when verbose $+        hPutStrLn stderr (src ++ ": OK")+      return True

@@ -0,0 +1,115 @@+cabal-version: >=1.10+name: qnap-decrypt+version: 0.3.0+license: BSD3+license-file: LICENSE+copyright: 2018 ALeX Kazik+maintainer: alex@kazik.de+author: ALeX Kazik+homepage: https://github.com/alexkazik/qnap-decrypt#readme+bug-reports: https://github.com/alexkazik/qnap-decrypt/issues+synopsis: Decrypt files encrypted by QNAP's Hybrid Backup Sync+description:+    Please see the README on Github at <https://github.com/alexkazik/qnap-decrypt#readme>+category: Cryptography+build-type: Simple+data-files:+    test/encrypted/c0+    test/encrypted/c1+    test/encrypted/c2+    test/encrypted/c3+    test/encrypted/c4+    test/encrypted/c5+    test/encrypted/u0+    test/encrypted/u1+    test/encrypted/u2+    test/encrypted/u3+    test/encrypted/u4+    test/encrypted/u5+    test/reference/c0+    test/reference/c1+    test/reference/c2+    test/reference/c3+    test/reference/c4+    test/reference/c5+    test/reference/u0+    test/reference/u1+    test/reference/u2+    test/reference/u3+    test/reference/u4+    test/reference/u5+extra-source-files:+    ChangeLog.md+    README.md++source-repository head+    type: git+    location: https://github.com/alexkazik/qnap-decrypt++library+    exposed-modules:+        Crypto.QNAP+        Data.Conduit.Crypto+    hs-source-dirs: src+    other-modules:+        Paths_qnap_decrypt+    default-language: Haskell2010+    build-depends:+        base >=4.10 && <5,+        binary >=0.6.4 && <0.9,+        bytestring >=0.10.0.0 && <0.11,+        cipher-aes128 >=0.1 && <0.8,+        conduit >=1.3.0 && <1.4,+        conduit-extra >=0.3.0 && <1.4,+        crypto-api >=0.13.3 && <0.14,+        directory >=1.2.7 && <1.4,+        streaming-commons >=0.1.0.0 && <0.2,+        tagged >=0.8.5 && <0.9,+        utf8-string >=1.0.1.1 && <1.1++executable qnap-decrypt+    main-is: Main.hs+    hs-source-dirs: app+    other-modules:+        Paths_qnap_decrypt+    default-language: Haskell2010+    build-depends:+        base >=4.10 && <5,+        binary >=0.6.4 && <0.9,+        bytestring >=0.10.0.0 && <0.11,+        cipher-aes128 >=0.1 && <0.8,+        conduit >=1.3.0 && <1.4,+        conduit-extra >=0.3.0 && <1.4,+        crypto-api >=0.13.3 && <0.14,+        directory >=1.2.7 && <1.4,+        filepath >=1.4.1.2 && <1.5,+        optparse-applicative >=0.14.2.0 && <0.15,+        qnap-decrypt -any,+        streaming-commons >=0.1.0.0 && <0.2,+        tagged >=0.8.5 && <0.9,+        utf8-string >=1.0.1.1 && <1.1++test-suite qnap-decrypt-test+    type: exitcode-stdio-1.0+    main-is: Spec.hs+    hs-source-dirs: test+    other-modules:+        Paths_qnap_decrypt+    default-language: Haskell2010+    build-depends:+        HUnit >=1.6.0.0 && <1.7,+        base >=4.10 && <5,+        binary >=0.6.4 && <0.9,+        bytestring >=0.10.0.0 && <0.11,+        cipher-aes128 >=0.1 && <0.8,+        conduit >=1.3.0 && <1.4,+        conduit-extra >=0.3.0 && <1.4,+        crypto-api >=0.13.3 && <0.14,+        directory >=1.2.7 && <1.4,+        filepath >=1.4.1.2 && <1.5,+        hspec >=2.4.8 && <2.5,+        qnap-decrypt -any,+        streaming-commons >=0.1.0.0 && <0.2,+        tagged >=0.8.5 && <0.9,+        temporary >=1.2.1.1 && <1.3,+        utf8-string >=1.0.1.1 && <1.1

@@ -0,0 +1,143 @@+-- | This is the heart of the qnap-decrypt package. It provides the function+--   to decrypt the files encryped by QNAP's Hybrid Backup Sync.+{-# LANGUAGE ScopedTypeVariables #-}++module Crypto.QNAP+  (+    -- * Decrypt+    decrypt+    -- * Errors+  , DecryptError(..)+  ) where++import           Control.Exception        (Exception (displayException), IOException, catch, handle, throw, throwIO)+import           Control.Monad            (when)+import           Crypto.Cipher.AES128     (AESKey256)+import           Crypto.Classes           (BlockCipher (buildKey, unCbc, unEcb), IV (IV))+import           Data.Binary.Get          (Get, getByteString, getWord64be, runGetOrFail)+import           Data.Bool                (bool)+import           Data.ByteString          (ByteString)+import qualified Data.ByteString          as BS+import qualified Data.ByteString.Lazy     as BL+import qualified Data.ByteString.UTF8     as BSU+import           Data.Conduit             (awaitForever, runConduitRes, yield, (.|))+import           Data.Conduit.Combinators (sinkFile, sourceHandle)+import           Data.Conduit.Zlib        (decompress, defaultWindowBits)+import           Data.Maybe               (fromMaybe, isJust)+import           Data.Streaming.Zlib      (ZlibException)+import           System.Directory         (getFileSize, removeFile)+import           System.IO                (IOMode (ReadMode), withBinaryFile)++import           Data.Conduit.Crypto++-- | Errors the decrypter could run into+--+--   The Exception instance has a specialized 'displayException' function+--   which renders the error in english text (unlike 'show' which just displays the constructor).+--+-- /Since 0.3.0/+data DecryptError+  = PasswordEmpty            -- ^ Password is empty+  | InvalidKey               -- ^ Invalid encryption key+  | UnknownFileType          -- ^ Unknown file type (the file is not encrypted or it's version is not known)+  | BadMagic                 -- ^ Bad Magic (probably wrong password)+  | HeaderDecodeError String -- ^ Error decoding the header: \<error>+  | PaddingError             -- ^ Padding is corrupt (probably damaged file)+  | IOError IOException      -- ^ IO Exception: \<error>+  | ZlibError ZlibException  -- ^ Decompression Exception: \<error> (probably damaged file)+  | FileSizeMismatch         -- ^ File size is different than excepted (probably damaged file)+  deriving (Show)++instance Exception DecryptError where+  displayException PasswordEmpty         = "Password is empty"+  displayException InvalidKey            = "Invalid encryption key"+  displayException UnknownFileType       = "Unknown file type (the file is not encrypted or it's version is not known)"+  displayException BadMagic              = "Bad Magic (probably wrong password)"+  displayException (HeaderDecodeError e) = "Error decoding the header: " ++ e+  displayException PaddingError          = "Padding is corrupt (probably damaged file)"+  displayException (IOError e)           = "IO Exception: " ++ displayException e+  displayException (ZlibError e)         = "Decompression Exception: " ++ displayException e ++ " (probably damaged file)"+  displayException FileSizeMismatch      = "File size is different than excepted (probably damaged file)"++-- Internal structure+newtype QNAPFileType+  = QNAPFileType+    { isCompressed :: Bool+    }++-- | Decrypt a QNAP encoded file (does not throw an exception)+--+-- /Since 0.3.0/+decrypt+  :: String -- ^ The password+  -> FilePath -- ^ The source file+  -> FilePath -- ^ The target file+  -> IO (Maybe DecryptError) -- ^ Returns an error or 'Nothing' in case of a success+decrypt password inName outName = cleanup $ withBinaryFile inName ReadMode $ \inHandle -> do+  when (null password)+    (throwIO PasswordEmpty)+  let+    keyHeader = buildAESKey256 (BSU.fromString (take 32 (cycle password)))+  fileType <- detectFileType <$> BS.hGet inHandle 16+  header <- unEcb keyHeader <$> BS.hGet inHandle 64+  let+    (keyBody, iv, size) =+      runGet'+        HeaderDecodeError+        getFileHeader+        (BL.fromStrict header)+  runConduitRes $+    sourceHandle inHandle .|+    decryptPaddedStream PaddingError defaultChunkSize (unCbc keyBody) iv .|+    (bool (awaitForever yield) (decompress defaultWindowBits) (isCompressed fileType)) .|+    sinkFile outName+  outSize <- getFileSize outName+  when (outSize /= size)+    (throwIO FileSizeMismatch)+  return Nothing+  where+    cleanup action = do+      result <-+        handle (\e -> return (Just (ZlibError e))) $+        handle (\e -> return (Just (IOError e))) $+        handle (\e -> return (Just e)) $+        action+      when (isJust result) $+        removeFile outName `catch` (\(_ :: IOException) -> return ())+      return result++-- Detect file type+detectFileType :: ByteString -> QNAPFileType+detectFileType header+  | header == BS.pack [0x4b, 0xca, 0x94, 0x72, 0x5e, 0x83, 0x1c, 0x31, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00] =+      QNAPFileType {isCompressed = False}+  | header == BS.pack [0x4b, 0xca, 0x94, 0x72, 0x5e, 0x83, 0x1c, 0x31, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00] =+      QNAPFileType {isCompressed = True}+  | otherwise =+      throw UnknownFileType++-- Read the file header+getFileHeader :: Get (AESKey256, IV cipher, Integer)+getFileHeader = do+  magic <- getByteString 8+  when (magic /= BS.pack [0x4b, 0xca, 0x94, 0x72, 0x5e, 0x83, 0x1c, 0x31])+    (throw BadMagic)+  keyBody <- getByteString 32+  iv <- getByteString 16+  size <- getWord64be+  return (buildAESKey256 keyBody, IV iv, toInteger size)++-- Generate key+buildAESKey256 :: ByteString -> AESKey256+buildAESKey256 = fromMaybe (throw InvalidKey) . buildKey++-- A version of runGet which:+-- 1. raises an exception (instead of error)+-- 2. fails when not all bytes are consumed+runGet' :: Exception e => (String -> e) -> Get a -> BL.ByteString -> a+runGet' ex g b = go (runGetOrFail g b)+  where+    go (Right (bs, _, r))+      | BL.null bs = r+      | otherwise  = throw (ex "Not all bytes are consumed")+    go (Left (_, _, e)) = throw (ex e)

@@ -0,0 +1,66 @@+-- | This module provides a function to decrypt a padded and encrypted+--   stream of 'ByteString's.++{-# LANGUAGE ScopedTypeVariables #-}++module Data.Conduit.Crypto+  ( -- * Decrypt+    decryptPaddedStream+    -- * Re-Export+  , defaultChunkSize+  ) where++import           Control.Exception             (Exception, throw)+import           Crypto.Classes                (BlockCipher, ByteLength, IV, blockSizeBytes)+import           Crypto.Padding                (unpadPKCS5safe)+import           Data.ByteString               (ByteString)+import qualified Data.ByteString               as BS+import           Data.ByteString.Builder.Extra (defaultChunkSize)+import qualified Data.ByteString.Lazy          as BL+import           Data.Conduit                  (ConduitT, yield)+import qualified Data.Conduit.Binary           as CB+import           Data.Tagged                   (Tagged, untag)++-- | Decrypt a PKCS padded and encrypted stream of 'ByteString's+--+-- @+--   runConduitRes $+--     sourceFile inName .|+--     decryptPaddedStream (error "Padding Error") defaultChunkSize (unCbc key) iv .|+--     sinkFile outName+-- @+--+-- /Since 0.3.0/+decryptPaddedStream+  :: forall e cipher m.+     Exception e+  => BlockCipher cipher+  => Monad m+  => e         -- ^ The exception to throw in case of a padding error+  -> Int       -- ^ The chunk size (in Bytes, you may use 'defaultChunkSize', will be modified to be+               --   a guaranteed multiple (at least 1) of the 'blockSizeBytes')+  -> (IV cipher -> ByteString -> (ByteString, IV cipher))+               -- ^ The decrypt function+  -> IV cipher -- ^ The IV (see 'BlockCipher')+  -> ConduitT ByteString ByteString m ()+decryptPaddedStream paddingError chunkSize decrypt = go BS.empty+  where+    go :: ByteString -> IV cipher -> ConduitT ByteString ByteString m ()+    go lastBlock currentIv = do+      (currentBlock, nextIv) <- decrypt currentIv . BL.toStrict <$> CB.take actualBlockSize+      if BS.length currentBlock < actualBlockSize+        then+          case unpadPKCS5safe (lastBlock `BS.append` currentBlock) of+            Just unpadded ->+              yield unpadded+            Nothing ->+              throw paddingError+        else do+          yield lastBlock+          go currentBlock nextIv+    -- the actual block size is probably chunkSize but guaranteed to be a multiple of the cipher block size (at least one)+    actualBlockSize :: Int+    actualBlockSize = ((chunkSize `div` cipherBlockSize) * cipherBlockSize) `max` cipherBlockSize+    -- block size of the cipher (16 in case of AES)+    cipherBlockSize :: Int+    cipherBlockSize = untag (blockSizeBytes :: Tagged cipher ByteLength)

@@ -0,0 +1,36 @@+{-# LANGUAGE ScopedTypeVariables #-}++import           Control.Exception    (IOException, catch)+import           Control.Monad        (forM_)+import qualified Data.ByteString.Lazy as BL+import           Data.Maybe           (isNothing)+import           System.Directory     (listDirectory, removeFile)+import           System.FilePath      ((</>))+import           System.IO            (hClose)+import           System.IO.Temp       (withSystemTempFile)+import           Test.Hspec           (describe, hspec, it, shouldSatisfy)+import           Test.HUnit.Base      ((@?))++import           Crypto.QNAP++encryptedDirectory :: FilePath+encryptedDirectory = "test/encrypted"++referenceDirectory :: FilePath+referenceDirectory = "test/reference"++password :: String+password = "qORFZQiilzCz5JIxiOOuVE2TsJ6Xn5Rk"++main :: IO ()+main =+  withSystemTempFile "decrypt" $ \tempFile tempFileHandle -> do+    hClose tempFileHandle+    files <- listDirectory encryptedDirectory+    hspec $ describe "Crypto.QNAP.dectypt" $+      forM_ files $ \file -> it ("Verify file " ++ file) $ do+        removeFile tempFile `catch` (\(_ :: IOException) -> return ())+        decrypt password (encryptedDirectory </> file) tempFile >>= (`shouldSatisfy` isNothing)+        decrypted <- BL.readFile tempFile+        reference <- BL.readFile (referenceDirectory </> file)+        decrypted == reference @? "Decrypted file does not match reference"

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