tls-2.0.5: TLS protocol native implementation

Safe Haskell | None
Language | Haskell2010

Network.TLS.QUIC

Contents

- Handshakers
- Callback
- Secrets
- Negotiated parameters
- Extensions
- Errors
- Hash
- Constants
- Supported

Description

API to run the TLS handshake establishing a QUIC connection.

On the northbound API:

- QUIC starts a TLS client or server thread with `tlsQUICClient` or `tlsQUICServer`.

TLS invokes QUIC callbacks to use the QUIC transport

- TLS uses `quicSend` and `quicRecv` to send and receive handshake message fragments.
- TLS calls `quicInstallKeys` to provide to QUIC the traffic secrets it should use for encryption/decryption.
- TLS calls `quicNotifyExtensions` to notify to QUIC the transport parameters exchanged through the handshake protocol.
- TLS calls `quicDone` when the handshake is done.

Synopsis

- tlsQUICClient :: ClientParams -> QUICCallbacks -> IO ()
- tlsQUICServer :: ServerParams -> QUICCallbacks -> IO ()
- data QUICCallbacks = QUICCallbacks {
  - quicSend :: [(CryptLevel, ByteString)] -> IO ()
  - quicRecv :: CryptLevel -> IO (Either TLSError ByteString)
  - quicInstallKeys :: Context -> KeyScheduleEvent -> IO ()
  - quicNotifyExtensions :: Context -> [ExtensionRaw] -> IO ()
  - quicDone :: Context -> IO ()
  }
- data CryptLevel
  - = CryptInitial
  - | CryptMainSecret
  - | CryptEarlySecret
  - | CryptHandshakeSecret
  - | CryptApplicationSecret
- data KeyScheduleEvent
  - = InstallEarlyKeys (Maybe EarlySecretInfo)
  - | InstallHandshakeKeys HandshakeSecretInfo
  - | InstallApplicationKeys ApplicationSecretInfo
- data EarlySecretInfo = EarlySecretInfo Cipher (ClientTrafficSecret EarlySecret)
- data HandshakeSecretInfo = HandshakeSecretInfo Cipher (TrafficSecrets HandshakeSecret)
- newtype ApplicationSecretInfo = ApplicationSecretInfo (TrafficSecrets ApplicationSecret)
- data EarlySecret
- data HandshakeSecret
- data ApplicationSecret
- type TrafficSecrets a = (ClientTrafficSecret a, ServerTrafficSecret a)
- newtype ServerTrafficSecret a = ServerTrafficSecret ByteString
- newtype ClientTrafficSecret a = ClientTrafficSecret ByteString
- type NegotiatedProtocol = ByteString
- data HandshakeMode13
  - = FullHandshake
  - | HelloRetryRequest
  - | PreSharedKey
  - | RTT0
- data ExtensionRaw = ExtensionRaw ExtensionID ByteString
- newtype ExtensionID where
  - ExtensionID Word16
  - pattern EID_QuicTransportParameters :: ExtensionID
- errorTLS :: String -> IO a
- errorToAlertDescription :: TLSError -> AlertDescription
- errorToAlertMessage :: TLSError -> String
- fromAlertDescription :: AlertDescription -> Word8
- toAlertDescription :: Word8 -> AlertDescription
- hkdfExpandLabel :: Hash -> ByteString -> ByteString -> ByteString -> Int -> ByteString
- hkdfExtract :: Hash -> ByteString -> ByteString -> ByteString
- hashDigestSize :: Hash -> Int
- quicMaxEarlyDataSize :: Int
- defaultSupported :: Supported

# Handshakers

tlsQUICClient :: ClientParams -> QUICCallbacks -> IO () #

Start a TLS handshake thread for a QUIC client. The client will use the specified TLS parameters and call the provided callback functions to send and receive handshake data.

tlsQUICServer :: ServerParams -> QUICCallbacks -> IO () #

Start a TLS handshake thread for a QUIC server. The server will use the specified TLS parameters and call the provided callback functions to send and receive handshake data.

# Callback

data QUICCallbacks #

Callbacks implemented by QUIC and to be called by TLS at specific points during the handshake. TLS may invoke them from external threads but calls are not concurrent. Only a single callback function is called at a given point in time.

Constructors

QUICCallbacks |

Fields

- quicSend :: [(CryptLevel, ByteString)] -> IO ()

  Called by TLS so that QUIC sends one or more handshake fragments. The content transiting on this API is the plaintext of the fragments and QUIC responsability is to encrypt this payload with the key material given for the specified level and an appropriate encryption scheme.

  The size of the fragments may exceed QUIC datagram limits so QUIC may break them into smaller fragments.

  The handshake protocol sometimes combines content at two levels in a single flight. The TLS library does its best to provide this in the same `quicSend` call and with a multi-valued argument. QUIC can then decide how to transmit this optimally.

- quicRecv :: CryptLevel -> IO (Either TLSError ByteString)

  Called by TLS to receive from QUIC the next plaintext handshake fragment. The argument specifies with which encryption level the fragment should be decrypted.

  QUIC may return partial fragments to TLS. TLS will then call `quicRecv` again as long as necessary. Note however that fragments must be returned in the correct sequence, i.e. the order the TLS peer emitted them.

  The function may return an error to TLS if end of stream is reached or if a protocol error has been received, believing the handshake cannot proceed any longer. If the TLS handshake protocol cannot recover from this error, the failure condition will be reported back to QUIC through the control interface.

- quicInstallKeys :: Context -> KeyScheduleEvent -> IO ()

  Called by TLS when new encryption material is ready to be used in the handshake. The next `quicSend` or `quicRecv` may now use the associated encryption level (although the previous level is also possible: directions Send/Recv do not change at the same time).

- quicNotifyExtensions :: Context -> [ExtensionRaw] -> IO ()

  Called by TLS when QUIC-specific extensions have been received from the peer.

- quicDone :: Context -> IO ()

  Called when `handshake` is done. `tlsQUICServer` is finished after calling this hook. `tlsQUICClient` calls `recvData` after calling this hook to wait for new session tickets.

data CryptLevel #

TLS encryption level.

Constructors

CryptInitial | Unprotected traffic
CryptMainSecret | Protected with main secret (TLS < 1.3)
CryptEarlySecret | Protected with early traffic secret (TLS 1.3)
CryptHandshakeSecret | Protected with handshake traffic secret (TLS 1.3)
CryptApplicationSecret | Protected with application traffic secret (TLS 1.3)

#### Instances

Instances details

Show CryptLevel # |
Instance details Defined in Network.TLS.Record.State Methods showsPrec :: Int -> CryptLevel -> ShowS # show :: CryptLevel -> String # showList :: [CryptLevel] -> ShowS #
Eq CryptLevel # |
Instance details Defined in Network.TLS.Record.State Methods (==) :: CryptLevel -> CryptLevel -> Bool # (/=) :: CryptLevel -> CryptLevel -> Bool #

data KeyScheduleEvent #

Argument given to `quicInstallKeys` when encryption material is available.

Constructors

InstallEarlyKeys (Maybe EarlySecretInfo) | Key material and parameters for traffic at 0-RTT level
InstallHandshakeKeys HandshakeSecretInfo | Key material and parameters for traffic at handshake level
InstallApplicationKeys ApplicationSecretInfo | Key material and parameters for traffic at application level

# Secrets

data EarlySecretInfo #

Handshake information generated for traffic at 0-RTT level.

Constructors

EarlySecretInfo Cipher (ClientTrafficSecret EarlySecret) |

#### Instances

Instances details

Show EarlySecretInfo # |
Instance details Defined in Network.TLS.Handshake.Control Methods showsPrec :: Int -> EarlySecretInfo -> ShowS # show :: EarlySecretInfo -> String # showList :: [EarlySecretInfo] -> ShowS #

data HandshakeSecretInfo #

Handshake information generated for traffic at handshake level.

Constructors

HandshakeSecretInfo Cipher (TrafficSecrets HandshakeSecret) |

#### Instances

Instances details

Show HandshakeSecretInfo # |
Instance details Defined in Network.TLS.Handshake.Control Methods showsPrec :: Int -> HandshakeSecretInfo -> ShowS # show :: HandshakeSecretInfo -> String # showList :: [HandshakeSecretInfo] -> ShowS #

newtype ApplicationSecretInfo #

Handshake information generated for traffic at application level.

Constructors

ApplicationSecretInfo (TrafficSecrets ApplicationSecret) |

#### Instances

Instances details

Show ApplicationSecretInfo # |
Instance details Defined in Network.TLS.Handshake.Control Methods showsPrec :: Int -> ApplicationSecretInfo -> ShowS # show :: ApplicationSecretInfo -> String # showList :: [ApplicationSecretInfo] -> ShowS #

data EarlySecret #

Phantom type indicating early traffic secret.

data HandshakeSecret #

Phantom type indicating handshake traffic secrets.

data ApplicationSecret #

Phantom type indicating application traffic secrets.

type TrafficSecrets a = (ClientTrafficSecret a, ServerTrafficSecret a) #

Hold both client and server traffic secrets at the same step.

newtype ServerTrafficSecret a #

A server traffic secret, typed with a parameter indicating a step in the TLS key schedule.

Constructors

ServerTrafficSecret ByteString |

#### Instances

Instances details

Show (ServerTrafficSecret a) # |
Instance details Defined in Network.TLS.Types Methods showsPrec :: Int -> ServerTrafficSecret a -> ShowS # show :: ServerTrafficSecret a -> String # showList :: [ServerTrafficSecret a] -> ShowS #

newtype ClientTrafficSecret a #

A client traffic secret, typed with a parameter indicating a step in the TLS key schedule.

Constructors

ClientTrafficSecret ByteString |

#### Instances

Instances details

Show (ClientTrafficSecret a) # |
Instance details Defined in Network.TLS.Types Methods showsPrec :: Int -> ClientTrafficSecret a -> ShowS # show :: ClientTrafficSecret a -> String # showList :: [ClientTrafficSecret a] -> ShowS #

# Negotiated parameters

type NegotiatedProtocol = ByteString #

ID of the application-level protocol negotiated between client and server. See values listed in the IANA registry.

data HandshakeMode13 #

Type to show which handshake mode is used in TLS 1.3.

Constructors

FullHandshake | Full handshake is used.
HelloRetryRequest | Full handshake is used with hello retry request.
PreSharedKey | Server authentication is skipped.
RTT0 | Server authentication is skipped and early data is sent.

#### Instances

Instances details

Show HandshakeMode13 # |
Instance details Defined in Network.TLS.Handshake.State Methods showsPrec :: Int -> HandshakeMode13 -> ShowS # show :: HandshakeMode13 -> String # showList :: [HandshakeMode13] -> ShowS #
Eq HandshakeMode13 # |
Instance details Defined in Network.TLS.Handshake.State Methods (==) :: HandshakeMode13 -> HandshakeMode13 -> Bool # (/=) :: HandshakeMode13 -> HandshakeMode13 -> Bool #

# Extensions

data ExtensionRaw #

The raw content of a TLS extension.

Constructors

ExtensionRaw ExtensionID ByteString |

#### Instances

Instances details

Show ExtensionRaw # |
Instance details Defined in Network.TLS.Struct Methods showsPrec :: Int -> ExtensionRaw -> ShowS # show :: ExtensionRaw -> String # showList :: [ExtensionRaw] -> ShowS #
Eq ExtensionRaw # |
Instance details Defined in Network.TLS.Struct Methods (==) :: ExtensionRaw -> ExtensionRaw -> Bool # (/=) :: ExtensionRaw -> ExtensionRaw -> Bool #

newtype ExtensionID #

Identifier of a TLS extension. http://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.txt

Constructors

ExtensionID Word16 |

Bundled Patterns

pattern EID_QuicTransportParameters :: ExtensionID |

#### Instances

Instances details

Show ExtensionID # |
Instance details Defined in Network.TLS.Struct Methods showsPrec :: Int -> ExtensionID -> ShowS # show :: ExtensionID -> String # showList :: [ExtensionID] -> ShowS #
Eq ExtensionID # |
Instance details Defined in Network.TLS.Struct Methods (==) :: ExtensionID -> ExtensionID -> Bool # (/=) :: ExtensionID -> ExtensionID -> Bool #

# Errors

errorTLS :: String -> IO a #

Can be used by callbacks to signal an unexpected condition. This will then generate an "internal_error" alert in the TLS stack.

errorToAlertDescription :: TLSError -> AlertDescription #

Return the alert that a TLS endpoint would send to the peer for the specified library error.

errorToAlertMessage :: TLSError -> String #

Return the message that a TLS endpoint can add to its local log for the specified library error.

fromAlertDescription :: AlertDescription -> Word8 #

toAlertDescription :: Word8 -> AlertDescription #

Decode an alert from the assigned value.

# Hash

hkdfExpandLabel :: Hash -> ByteString -> ByteString -> ByteString -> Int -> ByteString #

`HKDF-Expand-Label` function. Returns output keying material of the specified length from the PRK, customized for a TLS label and context.

hkdfExtract :: Hash -> ByteString -> ByteString -> ByteString #

`HKDF-Extract` function. Returns the pseudorandom key (PRK) from salt and input keying material (IKM).

hashDigestSize :: Hash -> Int #

Digest size in bytes.

# Constants

quicMaxEarlyDataSize :: Int #

Max early data size for QUIC.

# Supported

defaultSupported :: Supported #