mirror of https://github.com/goharbor/harbor.git
45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
// Copyright Project Harbor Authors
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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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// http://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 export
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import (
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"crypto/sha256"
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"io"
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"os"
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"github.com/opencontainers/go-digest"
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)
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// ArtifactDigestCalculator is an interface to be implemented by all file hash calculators
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type ArtifactDigestCalculator interface {
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// Calculate returns the hash for a file
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Calculate(fileName string) (digest.Digest, error)
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}
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type SHA256ArtifactDigestCalculator struct{}
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func (calc *SHA256ArtifactDigestCalculator) Calculate(fileName string) (digest.Digest, error) {
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file, err := os.OpenFile(fileName, os.O_RDONLY, os.ModePerm)
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if err != nil {
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return "", err
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}
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defer file.Close()
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hash := sha256.New()
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if _, err := io.Copy(hash, file); err != nil {
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return "", err
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}
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return digest.NewDigest(digest.SHA256, hash), nil
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}
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