forked from github/dynamiclistener
3e35acfa52
* Prevent creating non-standards compliant certs. Changes generated certificates to have a NotBefore based on either the CA NotBefore or the current time. This prevents creation of certificates that are valid for too long making them return errors on platforms like MacOS. * Add license header and add test cases
40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
/*
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Copyright 2014 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 cert
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import (
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"crypto/x509"
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"time"
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clockutil "k8s.io/utils/clock"
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)
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var clock clockutil.PassiveClock = &clockutil.RealClock{}
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// CalculateNotBefore calculates a NotBefore time of 1 hour in the past, or the
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// NotBefore time of the optionally provided *x509.Certificate, whichever is greater.
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func CalculateNotBefore(ca *x509.Certificate) time.Time {
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// Subtract 1 hour for clock skew
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now := clock.Now().UTC().Add(-time.Hour)
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// It makes no sense to return a time before the CA itself is valid.
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if ca != nil && now.Before(ca.NotBefore) {
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return ca.NotBefore
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}
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return now
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}
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