Module `HMAC.Noalloc`

Versions of these functions which write their output in a buffer passed in as an argument

val mac : alg:SharedDefs.HashDefs.alg -> key:bytes -> msg:bytes -> tag:bytes -> unit: mac alg key msg tag computes the HMAC of msg based on hashing algorithm alg using key key and writes the result in tag. The `tag` buffer needs to satisfy the size requirements for the output buffer.