37 lines
938 B
Go
37 lines
938 B
Go
/*
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Copyright 2017 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package file
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import (
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"crypto/sha1"
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"encoding/hex"
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"github.com/golang/glog"
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"io/ioutil"
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)
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// SHA1 returns the SHA1 of a file.
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func SHA1(filename string) string {
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hasher := sha1.New()
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s, err := ioutil.ReadFile(filename)
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if err != nil {
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glog.Errorf("Error reading file %v", err)
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return ""
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}
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hasher.Write(s)
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return hex.EncodeToString(hasher.Sum(nil))
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}
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