diff options
Diffstat (limited to 'src/Channel.hs')
| -rw-r--r-- | src/Channel.hs | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/src/Channel.hs b/src/Channel.hs index 9be4405..4627d70 100644 --- a/src/Channel.hs +++ b/src/Channel.hs @@ -17,7 +17,6 @@ import Control.Monad.Fail import Crypto.Cipher.AES import Crypto.Cipher.Types -import Crypto.Data.Padding import Crypto.Error import Crypto.Random @@ -135,17 +134,17 @@ channelEncrypt :: (ByteArray ba, MonadRandom m, MonadFail m) => Channel -> ba -> channelEncrypt ch plain = do CryptoPassed (cipher :: AES128) <- return $ cipherInit $ chKey ch let bsize = blockSize cipher - (iv :: ByteString) <- getRandomBytes bsize + (iv :: ByteString) <- getRandomBytes 12 CryptoPassed aead <- return $ aeadInit AEAD_GCM cipher iv - let (tag, ctext) = aeadSimpleEncrypt aead B.empty (pad (PKCS7 bsize) plain) bsize - return $ BA.concat [ convert iv, convert tag, ctext ] + let (tag, ctext) = aeadSimpleEncrypt aead B.empty plain bsize + return $ BA.concat [ convert iv, ctext, convert tag ] channelDecrypt :: (ByteArray ba, MonadFail m) => Channel -> ba -> m ba channelDecrypt ch body = do CryptoPassed (cipher :: AES128) <- return $ cipherInit $ chKey ch let bsize = blockSize cipher - (iv, body') = BA.splitAt bsize body - (tag, ctext) = BA.splitAt bsize body' + (iv, body') = BA.splitAt 12 body + (ctext, tag) = BA.splitAt (BA.length body' - bsize) body' CryptoPassed aead <- return $ aeadInit AEAD_GCM cipher iv - Just plain <- return $ unpad (PKCS7 bsize) =<< aeadSimpleDecrypt aead B.empty ctext (AuthTag $ convert tag) + Just plain <- return $ aeadSimpleDecrypt aead B.empty ctext (AuthTag $ convert tag) return plain |