62 lines
2.2 KiB
Haskell
62 lines
2.2 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.Applicative ((<$>))
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import Control.Monad.State
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import Data.ByteString (ByteString)
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import qualified Data.ByteString as B
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import Network.TLS.Util
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import Network.TLS.Record
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import Network.TLS.Packet
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import Network.TLS.State
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import Network.TLS.Handshake.State
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import Network.TLS.Crypto
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import Network.TLS.Cipher
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import Network.TLS.Types
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{- if the RSA encryption fails we just return an empty bytestring, and let the protocol
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- fail by itself; however it would be probably better to just report it since it's an internal problem.
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-}
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encryptRSA :: ByteString -> TLSSt ByteString
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encryptRSA content = do
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rsakey <- fromJust "rsa public key" . hstRSAPublicKey . fromJust "handshake" . stHandshake <$> get
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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 :: HashDescr -> ByteString -> TLSSt ByteString
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signRSA hsh content = do
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rsakey <- fromJust "rsa client private key" . hstRSAClientPrivateKey . fromJust "handshake" . stHandshake <$> get
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r <- withRNG (\g -> kxSign g rsakey hsh content)
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case r of
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Left err -> fail ("rsa sign failed: " ++ show err)
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Right econtent -> return econtent
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decryptRSA :: ByteString -> TLSSt (Either KxError ByteString)
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decryptRSA econtent = do
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ver <- getVersion
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rsapriv <- fromJust "rsa private key" . hstRSAPrivateKey . fromJust "handshake" . stHandshake <$> get
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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 :: HashDescr -> ByteString -> ByteString -> TLSSt Bool
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verifyRSA hsh econtent sign = do
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rsapriv <- fromJust "rsa client public key" . hstRSAClientPublicKey . fromJust "handshake" . stHandshake <$> get
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return $ kxVerify rsapriv hsh econtent sign
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