Crypto.MAC.HMAC

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

Documentation

hmac

Arguments

:: (ByteArrayAccess key, ByteArray 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)

ByteArrayAccess (HMAC a)

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.