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45 lines
1.3 KiB
45 lines
1.3 KiB
// Copyright 2017 Docker, Inc. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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package digest |
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import ( |
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"hash" |
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"io" |
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) |
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// Verifier presents a general verification interface to be used with message |
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// digests and other byte stream verifications. Users instantiate a Verifier |
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// from one of the various methods, write the data under test to it then check |
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// the result with the Verified method. |
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type Verifier interface { |
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io.Writer |
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// Verified will return true if the content written to Verifier matches |
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// the digest. |
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Verified() bool |
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} |
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type hashVerifier struct { |
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digest Digest |
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hash hash.Hash |
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} |
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func (hv hashVerifier) Write(p []byte) (n int, err error) { |
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return hv.hash.Write(p) |
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} |
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func (hv hashVerifier) Verified() bool { |
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return hv.digest == NewDigest(hv.digest.Algorithm(), hv.hash) |
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}
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