func Unwrap(h hash.Hash) hash.Hash
Unwrap returns h, or a crypto/internal/fips140 inner implementation of h.
The return value can be type asserted to one of crypto/internal/fips140/sha256.Digest, crypto/internal/fips140/sha512.Digest, or crypto/internal/fips140/sha3.Digest if it is a FIPS 140-3 approved hash.
func UnwrapNew[Hash hash.Hash](newHash func() Hash) func() hash.Hash
UnwrapNew returns a function that calls newHash and applies Unwrap to the return value.