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