62 lines
1.9 KiB
Go
62 lines
1.9 KiB
Go
/*
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Copyright 2022 The Flux 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 chartutil
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import (
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"github.com/opencontainers/go-digest"
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"helm.sh/helm/v3/pkg/chartutil"
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intyaml "github.com/fluxcd/helm-controller/internal/yaml"
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)
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// DigestValues calculates the digest of the values using the provided algorithm.
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// The caller is responsible for ensuring that the algorithm is supported.
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func DigestValues(algo digest.Algorithm, values chartutil.Values) digest.Digest {
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digester := algo.Digester()
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if values = valuesOrNil(values); values != nil {
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if err := intyaml.Encode(digester.Hash(), values, intyaml.SortMapSlice); err != nil {
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return ""
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}
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}
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return digester.Digest()
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}
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// VerifyValues verifies the digest of the values against the provided digest.
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func VerifyValues(digest digest.Digest, values chartutil.Values) bool {
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if digest.Validate() != nil {
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return false
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}
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verifier := digest.Verifier()
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if values = valuesOrNil(values); values != nil {
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if err := intyaml.Encode(verifier, values, intyaml.SortMapSlice); err != nil {
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return false
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}
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}
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return verifier.Verified()
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}
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// valuesOrNil returns nil if the values are empty, otherwise the values are
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// returned. This is used to ensure that the digest is calculated against nil
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// opposed to an empty object.
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func valuesOrNil(values chartutil.Values) chartutil.Values {
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if values != nil && len(values) == 0 {
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return nil
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}
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return values
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}
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