registry/digest/digester.go
Stephen J Day e37baed88e
digest: cleanup digester and verifier creation
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2016-12-15 15:17:21 -08:00

25 lines
586 B
Go

package digest
import "hash"
// Digester calculates the digest of written data. Writes should go directly
// to the return value of Hash, while calling Digest will return the current
// value of the digest.
type Digester interface {
Hash() hash.Hash // provides direct access to underlying hash instance.
Digest() Digest
}
// digester provides a simple digester definition that embeds a hasher.
type digester struct {
alg Algorithm
hash hash.Hash
}
func (d *digester) Hash() hash.Hash {
return d.hash
}
func (d *digester) Digest() Digest {
return NewDigest(d.alg, d.hash)
}