92 lines
2.5 KiB
Go
92 lines
2.5 KiB
Go
/*
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Copyright © 2022 - 2025 SUSE LLC
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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 plainauth
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import (
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"context"
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"crypto/sha256"
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"fmt"
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"net/http"
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"strings"
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"github.com/gorilla/websocket"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"sigs.k8s.io/controller-runtime/pkg/client"
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elementalv1 "github.com/rancher/elemental-operator/api/v1beta1"
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"github.com/rancher/elemental-operator/pkg/log"
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)
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type AuthServer struct {
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context.Context
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client.Client
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}
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func New(ctx context.Context, cl client.Client) *AuthServer {
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a := &AuthServer{
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Context: ctx,
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Client: cl,
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}
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return a
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}
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func (a *AuthServer) Authenticate(_ *websocket.Conn, req *http.Request, regNamespace string) (*elementalv1.MachineInventory, bool, error) {
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header := req.Header.Get("Authorization")
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if !strings.HasPrefix(header, "Bearer PLAIN") {
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log.Debugf("websocket connection missing PLAIN Authorization header from %s", req.RemoteAddr)
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return nil, true, nil
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}
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log.Info("Authentication: PLAIN")
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idToken := strings.TrimPrefix(header, "Bearer PLAIN")
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if idToken == "" {
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return nil, false, fmt.Errorf("cannot find token ID")
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}
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hashedToken := fmt.Sprintf("%x", sha256.Sum256([]byte(idToken)))
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mInvetoryList := &elementalv1.MachineInventoryList{}
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if err := a.List(a, mInvetoryList); err != nil {
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return nil, false, fmt.Errorf("failed to get MachineInventories list: %w", err)
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}
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var mInventory *elementalv1.MachineInventory
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for _, m := range mInvetoryList.Items {
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if m.Spec.MachineHash == hashedToken {
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// If we get two MachineInventory with the same MachineHash something went wrong
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if mInventory != nil {
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return nil, false, fmt.Errorf("failed to find inventory machine: Machine hash %s is present in both %s/%s and %s/%s",
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hashedToken, mInventory.Namespace, mInventory.Name, m.Namespace, m.Name)
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}
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mInventory = (&m).DeepCopy()
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}
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}
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if mInventory == nil {
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mInventory = &elementalv1.MachineInventory{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: regNamespace,
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},
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Spec: elementalv1.MachineInventorySpec{
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MachineHash: hashedToken,
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},
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}
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}
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return mInventory, false, nil
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}
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