feature proposal

[jbowes]

feature proposal

[jbowes]

hi!

yes, i am interested. My intent was to have builtin implementations for the default combinations in the spec's registry, but then allow for arbitrary signing/verification outside of the default registry.

so something like: ```go

type Signer interface {
Sign(in io.Reader) ([]byte, error)
}

func WithSigner(alg string, signer Signer) signatureOption

(and the same for verifier) seems about right to me. Then consumers would be responsible for bundling up pre-hashing and signing/verifying into a single interface.