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33e02aff60
This adds constants and validation for a new `auth-extra-groups` key on `bootstrap.kubernetes.io/token` secrets. This key allows a bootstrap token to authenticate to extra groups in addition to the `system:bootstrappers` group. Extra groups are always applied in addition to the `system:bootstrappers` group, must begin with a `system:bootstrappers:` prefix, are limited in length, and are limited to a restricted set of characters (alphanumeric, colons, and dashes without a trailing colon/dash).
35 lines
1.2 KiB
Go
35 lines
1.2 KiB
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 api
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import (
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"fmt"
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"regexp"
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)
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var bootstrapGroupRegexp = regexp.MustCompile(`\A` + BootstrapGroupPattern + `\z`)
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// ValidateBootstrapGroupName checks if the provided group name is a valid
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// bootstrap group name. Returns nil if valid or a validation error if invalid.
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// TODO(mattmoyer): this validation should migrate out to client-go (see https://github.com/kubernetes/client-go/issues/114)
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func ValidateBootstrapGroupName(name string) error {
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if bootstrapGroupRegexp.Match([]byte(name)) {
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return nil
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}
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return fmt.Errorf("bootstrap group %q is invalid (must match %s)", name, BootstrapGroupPattern)
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}
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