mirror of https://github.com/k3s-io/k3s
48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
/*
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Copyright 2018 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 checksum
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import (
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"hash/fnv"
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"k8s.io/kubernetes/pkg/kubelet/checkpointmanager/errors"
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hashutil "k8s.io/kubernetes/pkg/util/hash"
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)
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// Checksum is the data to be stored as checkpoint
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type Checksum uint64
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// Verify verifies that passed checksum is same as calculated checksum
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func (cs Checksum) Verify(data interface{}) error {
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if cs != New(data) {
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return errors.ErrCorruptCheckpoint
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}
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return nil
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}
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// New returns the Checksum of checkpoint data
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func New(data interface{}) Checksum {
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return Checksum(getChecksum(data))
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}
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// Get returns calculated checksum of checkpoint data
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func getChecksum(data interface{}) uint64 {
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hash := fnv.New32a()
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hashutil.DeepHashObject(hash, data)
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return uint64(hash.Sum32())
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}
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