Crypto.MAC.HMAC

Provide the HMAC (Hash based Message Authentification Code) base algorithm. http://en.wikipedia.org/wiki/HMAC

Documentation

hmac

Arguments

:: (ByteArrayAccess key, ByteArrayAccess message, HashAlgorithm a)

=> key

Secret key

-> message

Message to MAC

-> HMAC a

compute a MAC using the supplied hashing function

newtype HMAC a

Represent an HMAC that is a phantom type with the hash used to produce the mac.

The Eq instance is constant time.

Constructors

HMAC

Fields

• hmacGetDigest :: Digest a

Instances

Eq (HMAC a)

Methods

(==) :: HMAC a -> HMAC a -> Bool

(/=) :: HMAC a -> HMAC a -> Bool

ByteArrayAccess (HMAC a)

Methods

length :: HMAC a -> Int

withByteArray :: HMAC a -> (Ptr p -> IO a) -> IO a

copyByteArrayToPtr :: HMAC a -> Ptr p -> IO ()

Incremental

data Context hashalg

Represent an ongoing HMAC state, that can be appended with update and finalize to an HMAC with hmacFinalize

Constructors

Context !(Context hashalg) !(Context hashalg)

initialize

Arguments

:: (ByteArrayAccess key, HashAlgorithm a)

=> key

Secret key

-> Context a

Initialize a new incremental HMAC context

update

Arguments

:: (ByteArrayAccess message, HashAlgorithm a)

=> Context a

Current HMAC context

-> message

Message to append to the MAC

-> Context a

Updated HMAC context

Incrementally update a HMAC context

updates

Arguments

:: (ByteArrayAccess message, HashAlgorithm a)

=> Context a

Current HMAC context

-> [message]

Messages to append to the MAC

-> Context a

Updated HMAC context

Increamentally update a HMAC context with multiple inputs

finalize :: HashAlgorithm a => Context a -> HMAC a

Finalize a HMAC context and return the HMAC.