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3a3c2fa0c8
This aligns with spec changes coming in https://github.com/kubernetes/community/pull/381. Signed-off-by: Joe Beda <joe.github@bedafamily.com>
110 lines
3.3 KiB
Go
110 lines
3.3 KiB
Go
/*
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Copyright 2016 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 bootstrap
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import (
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"regexp"
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"time"
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"github.com/golang/glog"
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"k8s.io/client-go/pkg/api/v1"
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bootstrapapi "k8s.io/kubernetes/pkg/bootstrap/api"
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)
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var namePattern = `^` + regexp.QuoteMeta(bootstrapapi.BootstrapTokenSecretPrefix) + `([a-z0-9]{6})$`
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var nameRegExp = regexp.MustCompile(namePattern)
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// getSecretString gets a string value from a secret. If there is an error or
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// if the key doesn't exist, an empty string is returned.
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func getSecretString(secret *v1.Secret, key string) string {
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data, ok := secret.Data[key]
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if !ok {
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return ""
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}
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return string(data)
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}
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// parseSecretName parses the name of the secret to extract the secret ID.
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func parseSecretName(name string) (secretID string, ok bool) {
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r := nameRegExp.FindStringSubmatch(name)
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if r == nil {
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return "", false
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}
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return r[1], true
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}
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func validateSecretForSigning(secret *v1.Secret) (tokenID, tokenSecret string, ok bool) {
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nameTokenID, ok := parseSecretName(secret.Name)
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if !ok {
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glog.V(3).Infof("Invalid secret name: %s. Must be of form %s<secret-id>.", secret.Name, bootstrapapi.BootstrapTokenSecretPrefix)
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return "", "", false
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}
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tokenID = getSecretString(secret, bootstrapapi.BootstrapTokenIDKey)
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if len(tokenID) == 0 {
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glog.V(3).Infof("No %s key in %s/%s Secret", bootstrapapi.BootstrapTokenIDKey, secret.Namespace, secret.Name)
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return "", "", false
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}
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if nameTokenID != tokenID {
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glog.V(3).Infof("Token ID (%s) doesn't match secret name: %s", tokenID, nameTokenID)
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return "", "", false
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}
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tokenSecret = getSecretString(secret, bootstrapapi.BootstrapTokenSecretKey)
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if len(tokenSecret) == 0 {
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glog.V(3).Infof("No %s key in %s/%s Secret", bootstrapapi.BootstrapTokenSecretKey, secret.Namespace, secret.Name)
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return "", "", false
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}
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// Ensure this secret hasn't expired. The TokenCleaner should remove this
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// but if that isn't working or it hasn't gotten there yet we should check
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// here.
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if isSecretExpired(secret) {
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return "", "", false
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}
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// Make sure this secret can be used for signing
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okToSign := getSecretString(secret, bootstrapapi.BootstrapTokenUsageSigningKey)
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if okToSign != "true" {
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return "", "", false
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}
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return tokenID, tokenSecret, true
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}
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// isSecretExpired returns true if the Secret is expired.
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func isSecretExpired(secret *v1.Secret) bool {
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expiration := getSecretString(secret, bootstrapapi.BootstrapTokenExpirationKey)
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if len(expiration) > 0 {
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expTime, err2 := time.Parse(time.RFC3339, expiration)
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if err2 != nil {
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glog.V(3).Infof("Unparseable expiration time (%s) in %s/%s Secret: %v. Treating as expired.",
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expiration, secret.Namespace, secret.Name, err2)
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return true
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}
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if time.Now().After(expTime) {
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glog.V(3).Infof("Expired bootstrap token in %s/%s Secret: %v",
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secret.Namespace, secret.Name, expiration)
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return true
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}
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}
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return false
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}
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