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authorMatthew Heon <matthew.heon@gmail.com>2017-11-01 11:24:59 -0400
committerMatthew Heon <matthew.heon@gmail.com>2017-11-01 11:24:59 -0400
commita031b83a09a8628435317a03f199cdc18b78262f (patch)
treebc017a96769ce6de33745b8b0b1304ccf38e9df0 /vendor/github.com/opencontainers/go-digest/verifiers.go
parent2b74391cd5281f6fdf391ff8ad50fd1490f6bf89 (diff)
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Initial checkin from CRI-O repo
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Diffstat (limited to 'vendor/github.com/opencontainers/go-digest/verifiers.go')
-rw-r--r--vendor/github.com/opencontainers/go-digest/verifiers.go45
1 files changed, 45 insertions, 0 deletions
diff --git a/vendor/github.com/opencontainers/go-digest/verifiers.go b/vendor/github.com/opencontainers/go-digest/verifiers.go
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+// 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)
+}