64 lines
2.3 KiB
Haskell
64 lines
2.3 KiB
Haskell
-- |
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-- Module : Network.TLS.Handshake.Key
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-- License : BSD-style
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-- Maintainer : Vincent Hanquez <vincent@snarc.org>
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-- Stability : experimental
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-- Portability : unknown
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--
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-- functions for RSA operations
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--
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module Network.TLS.Handshake.Key
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( encryptRSA
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, signRSA
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, decryptRSA
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, verifyRSA
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) where
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import Control.Monad.State
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import Data.ByteString (ByteString)
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import qualified Data.ByteString as B
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import Network.TLS.Util
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import Network.TLS.Handshake.State
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import Network.TLS.State (withRNG, getVersion)
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import Network.TLS.Crypto
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import Network.TLS.Types
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import Network.TLS.Context
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{- if the RSA encryption fails we just return an empty bytestring, and let the protocol
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- fail by itself; however it would be probably better to just report it since it's an internal problem.
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-}
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encryptRSA :: Context -> ByteString -> IO ByteString
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encryptRSA ctx content = do
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rsakey <- return . fromJust "rsa public key" =<< handshakeGet ctx hstRSAPublicKey
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usingState_ ctx $ do
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v <- withRNG (\g -> kxEncrypt g rsakey content)
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case v of
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Left err -> fail ("rsa encrypt failed: " ++ show err)
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Right econtent -> return econtent
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signRSA :: Context -> HashDescr -> ByteString -> IO ByteString
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signRSA ctx hsh content = do
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rsakey <- return . fromJust "rsa client private key" =<< handshakeGet ctx hstRSAClientPrivateKey
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usingState_ ctx $ do
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r <- withRNG (\g -> kxSign g rsakey hsh content)
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case r of
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Left err -> fail ("rsa sign failed: " ++ show err)
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Right econtent -> return econtent
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decryptRSA :: Context -> ByteString -> IO (Either KxError ByteString)
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decryptRSA ctx econtent = do
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rsapriv <- return . fromJust "rsa private key" =<< handshakeGet ctx hstRSAPrivateKey
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usingState_ ctx $ do
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ver <- getVersion
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let cipher = if ver < TLS10 then econtent else B.drop 2 econtent
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withRNG (\g -> kxDecrypt g rsapriv cipher)
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verifyRSA :: Context -> HashDescr -> ByteString -> ByteString -> IO Bool
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verifyRSA ctx hsh econtent sign = do
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rsapriv <- return . fromJust "rsa client public key" =<< handshakeGet ctx hstRSAClientPublicKey
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return $ kxVerify rsapriv hsh econtent sign
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handshakeGet :: Context -> (HandshakeState -> a) -> IO a
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handshakeGet ctx f = usingHState ctx (gets f)
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