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When receiving activity to inbox, verify the body digest
This patch does a small simple change, however at the cost of the request body not being available for display in the latest activity list, unless processing succeeds. I'll fix this situation in a separate patch.
This commit is contained in:
fr33domlover
parent
57374ec816
commit
d24710c46a
2 changed files with 41 additions and 19 deletions
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@ -24,6 +24,7 @@ import Control.Monad.STM (atomically)
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import Control.Monad.Trans.Except
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import Control.Monad.Trans.Maybe
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import Crypto.Error (CryptoFailable (..))
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import Crypto.Hash.Algorithms
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import Data.Char
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import Data.Either (isRight)
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import Data.HashMap.Strict (HashMap)
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@ -35,9 +36,10 @@ import Data.Time.Units (Second, Minute, Day)
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import Database.Persist.Postgresql
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import Database.Persist.Sql (ConnectionPool, runSqlPool)
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import Graphics.SVGFonts.ReadFont (PreparedFont)
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import Network.HTTP.Client
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import Network.HTTP.Client (Manager, HasHttpManager (..))
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import Network.HTTP.Types.Header (hHost)
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import Network.URI (URI, uriAuthority, uriFragment, uriRegName, parseURI)
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import Network.Wai
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import Text.Shakespeare.Text (textFile)
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import Text.Hamlet (hamletFile)
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--import Text.Jasmine (minifym)
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@ -57,7 +59,8 @@ import qualified Yesod.Core.Unsafe as Unsafe
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import qualified Data.Text as T
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--import qualified Data.Text.Encoding as TE
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import Network.HTTP.Signature hiding (Algorithm (..))
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import Network.HTTP.Digest
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import Network.HTTP.Signature hiding (Algorithm (..), requestHeaders)
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import Yesod.Auth.Unverified
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import Yesod.Auth.Unverified.Creds
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import Yesod.HttpSignature (YesodHttpSig (..))
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@ -647,8 +650,8 @@ data ActorDetail = ActorDetail
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}
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instance YesodHttpSig App where
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data HttpSigVerResult App = HttpSigVerResult (Either String ActorDetail)
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httpSigVerRequiredHeaders = const [hRequestTarget, hHost]
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data HttpSigVerResult App = HttpSigVerResult (Either String (ActorDetail, BL.ByteString))
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httpSigVerRequiredHeaders = const [hRequestTarget, hHost, hDigest]
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httpSigVerWantedHeaders = const [hActivityPubActor]
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httpSigVerSeconds =
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fromIntegral . toSeconds . appHttpSigTimeLimit . appSettings
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@ -658,6 +661,7 @@ instance YesodHttpSig App where
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httpVerifySig (Verification malgo (KeyId keyid) input (Signature signature)) = fmap HttpSigVerResult $ runExceptT $ do
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(host, luKey) <- f2l <$> parseKeyId keyid
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checkHost host
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body <- verifyBodyDigest
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mluActorHeader <- getActorHeader host
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manager <- getsYesod appHttpManager
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(inboxOrVkid, vkd) <- do
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@ -736,11 +740,14 @@ instance YesodHttpSig App where
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return (iid, rsid)
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else errSig2
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return ActorDetail
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return
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( ActorDetail
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{ actorDetailId = l2f host $ vkdActorId vkd
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, actorDetailInstance = iid
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, actorDetailSharer = rsid
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}
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, body
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)
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where
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parseKeyId k =
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case parseFedURI =<< (first displayException . decodeUtf8') k of
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@ -756,6 +763,16 @@ instance YesodHttpSig App where
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throwE "Received HTTP signed request from the instance's host"
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where
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isAsciiLetter c = isAsciiLower c || isAsciiUpper c
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verifyBodyDigest = do
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req <- waiRequest
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let headers = requestHeaders req
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digest <- case parseHttpBodyDigest SHA256 "SHA-256" headers of
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Left s -> throwE $ "Parsing digest header failed: " ++ s
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Right d -> return d
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(digest', body) <- liftIO $ hashHttpBody SHA256 (requestBody req)
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unless (digest == digest') $
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throwE "Body digest verification failed"
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return body
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getActorHeader host = do
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bs <- lookupHeaders hActivityPubActor
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case bs of
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@ -138,21 +138,24 @@ postSharerInboxR shrRecip = do
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federation <- getsYesod $ appFederation . appSettings
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unless federation badMethod
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contentTypes <- lookupHeaders "Content-Type"
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body <- requireJsonBody
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now <- liftIO getCurrentTime
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result <- go now contentTypes body
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recordActivity now result contentTypes body
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result <- go now contentTypes
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recordActivity now result contentTypes
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case result of
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Left _ -> sendResponseStatus badRequest400 ()
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Right _ -> return ()
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where
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go now ctypes (WithValue raw (Doc hActivity activity)) = runExceptT $ do
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go now ctypes = runExceptT $ do
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verifyContentType
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HttpSigVerResult result <-
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ExceptT $
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first (T.pack . displayException) <$>
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verifyRequestSignature now
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ActorDetail uSender iid _raid <- ExceptT $ pure $ first T.pack result
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(ActorDetail uSender iid _raid, body) <- ExceptT $ pure $ first T.pack result
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WithValue raw (Doc hActivity activity) <-
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case eitherDecode' body of
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Left s -> throwE $ "Parsing activity failed: " <> T.pack s
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Right wv -> return wv
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let (hSender, luSender) = f2l uSender
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unless (hSender == hActivity) $
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throwE $ T.concat
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@ -165,7 +168,7 @@ postSharerInboxR shrRecip = do
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, renderFedURI $ l2f hActivity $ activityActor activity
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, "> != Signature key's actor <", renderFedURI uSender, ">"
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]
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handleSharerInbox now shrRecip iid raw activity
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(raw,) <$> handleSharerInbox now shrRecip iid raw activity
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where
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verifyContentType =
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case ctypes of
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@ -183,12 +186,14 @@ postSharerInboxR shrRecip = do
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typeAS2 =
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"application/ld+json; \
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\profile=\"https://www.w3.org/ns/activitystreams\""
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recordActivity now result contentTypes body = do
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recordActivity now result contentTypes = do
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acts <- getsYesod appActivities
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liftIO $ atomically $ modifyTVar' acts $ \ vec ->
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let msg = either id id result
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formattedBody = encodePretty $ wvRaw body
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item = ActivityReport now msg contentTypes formattedBody
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let (msg, body) =
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case result of
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Left t -> (t, "{?}")
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Right (o, t) -> (t, encodePretty o)
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item = ActivityReport now msg contentTypes body
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vec' = item `V.cons` vec
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in if V.length vec' > 10
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then V.init vec'
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