a70298180a
Script is available at https://github.com/jetstack/cert-manager/pull/3201 Signed-off-by: Richard Wall <richard.wall@jetstack.io>
52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
/*
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Copyright 2019 The Jetstack cert-manager contributors.
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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 util
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import (
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"encoding/json"
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"fmt"
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"hash/fnv"
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"regexp"
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cmapi "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1"
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)
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func ComputeCertificateRequestName(crt *cmapi.Certificate) (string, error) {
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specBytes, err := json.Marshal(crt.Spec)
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if err != nil {
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return "", err
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}
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hashF := fnv.New32()
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_, err = hashF.Write(specBytes)
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if err != nil {
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return "", err
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}
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crtName := crt.Name
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if len(crtName) >= 52 {
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// shorten the cert name to 52 chars to ensure the total length of the name
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// also shorten the 52 char string to the last non-symbol character
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// is less than or equal to 64 characters
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validCharIndexes := regexp.MustCompile(`[a-zA-Z\d]`).FindAllStringIndex(fmt.Sprintf("%.52s", crtName), -1)
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crtName = crtName[:validCharIndexes[len(validCharIndexes)-1][1]]
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}
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return fmt.Sprintf("%s-%d", crtName, hashF.Sum32()), nil
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}
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