sigbase

type Base struct {
	Values map[string]string

	// Header is an HTTP header with
	// key/value pairs that have been added to the base.
	//
	// Header is intended for use in HTTP request middleware
	// rather than for signature verification.
	//
	// The header values are copied as-is from the input request
	// and whitespace trimming / obsolete line folding is not
	// performed on these.
	Header http.Header
}

type Hasher interface {
	io.Writer
	Sum() []byte
}