mirror of
https://github.com/openziti/ziti.git
synced 2026-09-10 08:45:41 +00:00
Paul Lorenz
111 lines
3.8 KiB
Go
111 lines
3.8 KiB
Go
/*
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Copyright NetFoundry, Inc.
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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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https://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 handler_ctrl
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import (
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"crypto/sha1"
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"crypto/x509"
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"fmt"
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"github.com/michaelquigley/pfxlog"
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"github.com/openziti/channel"
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"github.com/openziti/fabric/controller/network"
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"github.com/openziti/foundation/identity/identity"
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"github.com/openziti/foundation/util/errorz"
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"github.com/openziti/foundation/util/stringz"
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"github.com/pkg/errors"
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"time"
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)
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type ConnectHandler struct {
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identity identity.Identity
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network *network.Network
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}
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func NewConnectHandler(identity identity.Identity, network *network.Network) *ConnectHandler {
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return &ConnectHandler{
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identity: identity,
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network: network,
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}
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}
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func (self *ConnectHandler) HandleConnection(hello *channel.Hello, certificates []*x509.Certificate) error {
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id := hello.IdToken
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log := pfxlog.Logger().WithField("routerId", id)
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// verify cert chain
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if len(certificates) == 0 {
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return errors.Errorf("no certificates provided, unable to verify dialer, routerId: %v", id)
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}
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config := self.identity.ServerTLSConfig()
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opts := x509.VerifyOptions{
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Roots: config.RootCAs,
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Intermediates: x509.NewCertPool(),
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KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageAny},
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}
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var validFingerPrints []string
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var errorList errorz.MultipleErrors
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for i, cert := range certificates {
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if _, err := cert.Verify(opts); err == nil {
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fingerprint := fmt.Sprintf("%x", sha1.Sum(cert.Raw))
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validFingerPrints = append(validFingerPrints, fingerprint)
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log.Debugf("%d): peer certificate fingerprint [%s]", i, fingerprint)
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log.Debugf("%d): peer common name [%s]", i, cert.Subject.CommonName)
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} else {
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errorList = append(errorList, err)
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}
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}
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if len(validFingerPrints) == 0 && len(errorList) > 0 {
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return errorList.ToError()
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}
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log.Debugf("peer has [%d] valid certificates out of [%v] submitted", len(validFingerPrints), len(certificates))
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if router := self.network.GetConnectedRouter(id); router != nil {
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if time.Now().Sub(router.ConnectTime) < self.network.GetOptions().RouterConnectChurnLimit {
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log.WithField("routerName", router.Name).Error("router already connected and churn threshold not met")
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return errors.Errorf("router already connected id: %s, name: %s", id, router.Name)
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}
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log.WithField("routerName", router.Name).Warn("router already connected, but churn threshold met. replacing connection")
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// make sure we're setting up a new router instance. Otherwise we'll be overwriting the current cached router
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// and the connect/disconnect processes will get confused. We could disconnect the existing router here, but it's
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// probably better to wait until this connection is fully setup and there isn't any chance of error
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self.network.Routers.RemoveFromCache(id)
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}
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if r, err := self.network.GetRouter(id); err == nil {
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if r.Fingerprint == nil {
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log.Error("router enrollment incomplete")
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return errors.Errorf("router enrollment incomplete, routerId: %v", id)
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}
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if !stringz.Contains(validFingerPrints, *r.Fingerprint) {
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log.WithField("fp", *r.Fingerprint).WithField("givenFps", validFingerPrints).Error("router fingerprint mismatch")
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return errors.Errorf("incorrect fingerprint/unenrolled router, routerId: %v, given fingerprints: %v", id, validFingerPrints)
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}
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} else {
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log.Error("unknown/unenrolled router")
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return errors.Errorf("unknown/unenrolled router, routerId: %v", id)
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}
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return nil
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}
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