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moby--moby/vendor/github.com/opencontainers/go-digest/verifiers.go
Stephen J Day 083ad52f60
vendor: update dependencies for go-digest
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2017-01-06 18:48:52 -08:00

31 lines
720 B
Go

package digest
import (
"hash"
"io"
)
// Verifier presents a general verification interface to be used with message
// digests and other byte stream verifications. Users instantiate a Verifier
// from one of the various methods, write the data under test to it then check
// the result with the Verified method.
type Verifier interface {
io.Writer
// Verified will return true if the content written to Verifier matches
// the digest.
Verified() bool
}
type hashVerifier struct {
digest Digest
hash hash.Hash
}
func (hv hashVerifier) Write(p []byte) (n int, err error) {
return hv.hash.Write(p)
}
func (hv hashVerifier) Verified() bool {
return hv.digest == NewDigest(hv.digest.Algorithm(), hv.hash)
}