checksum/hash/sha256.go

package hash

import (
	"crypto/sha256"
	"hash"
)

type (
	Sha256 struct {
		d hash.Hash
	}
)

func (s *Sha256) String() string {
	return "sha256"
}

func (s *Sha256) Append(data []byte) {
	if s.d == nil {
		s.d = sha256.New()
	}

	s.d.Write(data)
}

func (s *Sha256) Finish() []byte {
	if s.d == nil {
		s.d = sha256.New()
	}

	return s.d.Sum(nil)
}