mirror of https://github.com/docker/cli.git
47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
// Copyright 2019, 2020 OCI Contributors
|
|
// Copyright 2017 Docker, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
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)
|
|
}
|