mirror of https://github.com/k3s-io/k3s
72 lines
2.4 KiB
Go
72 lines
2.4 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 union
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import (
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"context"
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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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"k8s.io/apiserver/pkg/authentication/authenticator"
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)
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// unionAuthTokenHandler authenticates tokens using a chain of authenticator.Token objects
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type unionAuthTokenHandler struct {
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// Handlers is a chain of request authenticators to delegate to
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Handlers []authenticator.Token
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// FailOnError determines whether an error returns short-circuits the chain
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FailOnError bool
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}
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// New returns a token authenticator that validates credentials using a chain of authenticator.Token objects.
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// The entire chain is tried until one succeeds. If all fail, an aggregate error is returned.
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func New(authTokenHandlers ...authenticator.Token) authenticator.Token {
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if len(authTokenHandlers) == 1 {
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return authTokenHandlers[0]
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}
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return &unionAuthTokenHandler{Handlers: authTokenHandlers, FailOnError: false}
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}
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// NewFailOnError returns a token authenticator that validates credentials using a chain of authenticator.Token objects.
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// The first error short-circuits the chain.
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func NewFailOnError(authTokenHandlers ...authenticator.Token) authenticator.Token {
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if len(authTokenHandlers) == 1 {
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return authTokenHandlers[0]
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}
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return &unionAuthTokenHandler{Handlers: authTokenHandlers, FailOnError: true}
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}
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// AuthenticateToken authenticates the token using a chain of authenticator.Token objects.
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func (authHandler *unionAuthTokenHandler) AuthenticateToken(ctx context.Context, token string) (*authenticator.Response, bool, error) {
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var errlist []error
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for _, currAuthRequestHandler := range authHandler.Handlers {
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info, ok, err := currAuthRequestHandler.AuthenticateToken(ctx, token)
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if err != nil {
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if authHandler.FailOnError {
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return info, ok, err
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}
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errlist = append(errlist, err)
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continue
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}
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if ok {
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return info, ok, err
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}
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}
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return nil, false, utilerrors.NewAggregate(errlist)
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}
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