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feat: implement token expiration watcher

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This commit is contained in:
James Houlahan
2020-04-02 14:10:15 +02:00
parent ce29d4d74e
commit 941e09079c
15 changed files with 149 additions and 93 deletions
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23
pkg/pmapi/auth.go
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@ -24,7 +24,6 @@ import (
"fmt"
"net/http"
"strings"
"time"
pmcrypto "github.com/ProtonMail/gopenpgp/crypto"
"github.com/ProtonMail/proton-bridge/pkg/srp"
@ -197,15 +196,19 @@ type AuthRefreshReq struct {
}
func (c *Client) sendAuth(auth *Auth) {
c.cm.getClientAuthChannel() <- ClientAuth{
UserID: c.userID,
Auth: auth,
}
go func() {
c.log.Debug("Client is sending auth to ClientManager")
if auth != nil {
c.uid = auth.UID()
c.accessToken = auth.accessToken
}
c.cm.getClientAuthChannel() <- ClientAuth{
UserID: c.userID,
Auth: auth,
}
if auth != nil {
c.uid = auth.UID()
c.accessToken = auth.accessToken
}
}()
}
// AuthInfo gets authentication info for a user.
@ -324,7 +327,6 @@ func (c *Client) Auth(username, password string, info *AuthInfo) (auth *Auth, er
}
}
c.expiresAt = time.Now().Add(time.Duration(auth.ExpiresIn) * time.Second)
return auth, err
}
@ -445,7 +447,6 @@ func (c *Client) AuthRefresh(uidAndRefreshToken string) (auth *Auth, err error)
auth = res.getAuth()
c.sendAuth(auth)
c.expiresAt = time.Now().Add(time.Duration(auth.ExpiresIn) * time.Second)
return auth, err
}

2
pkg/pmapi/client.go
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@ -81,6 +81,7 @@ type ClientConfig struct {
// Transport specifies the mechanism by which individual HTTP requests are made.
// If nil, http.DefaultTransport is used.
// TODO: This could be removed entirely and set in the client manager via SetClientRoundTripper.
Transport http.RoundTripper
// Timeout specifies the timeout from request to getting response headers to our API.
@ -108,7 +109,6 @@ type Client struct {
requestLocker sync.Locker
keyLocker sync.Locker
expiresAt time.Time
user *User
addresses AddressList
kr *pmcrypto.KeyRing

102
pkg/pmapi/clientmanager.go
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@ -3,12 +3,15 @@ package pmapi
import (
"net/http"
"sync"
"time"
"github.com/getsentry/raven-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
var proxyUseDuration = 24 * time.Hour
// ClientManager is a manager of clients.
type ClientManager struct {
config *ClientConfig
@ -16,8 +19,9 @@ type ClientManager struct {
clients map[string]*Client
clientsLocker sync.Locker
tokens map[string]string
tokensLocker sync.Locker
tokens map[string]string
tokenExpirations map[string]*tokenExpiration
tokensLocker sync.Locker
url string
urlLocker sync.Locker
@ -34,6 +38,11 @@ type ClientAuth struct {
Auth *Auth
}
type tokenExpiration struct {
timer *time.Timer
cancel chan (struct{})
}
// NewClientManager creates a new ClientMan which manages clients configured with the given client config.
func NewClientManager(config *ClientConfig) (cm *ClientManager) {
if err := raven.SetDSN(config.SentryDSN); err != nil {
@ -46,8 +55,9 @@ func NewClientManager(config *ClientConfig) (cm *ClientManager) {
clients: make(map[string]*Client),
clientsLocker: &sync.Mutex{},
tokens: make(map[string]string),
tokensLocker: &sync.Mutex{},
tokens: make(map[string]string),
tokenExpirations: make(map[string]*tokenExpiration),
tokensLocker: &sync.Mutex{},
url: RootURL,
urlLocker: &sync.Mutex{},
@ -112,43 +122,56 @@ func (cm *ClientManager) GetRootURL() string {
return cm.url
}
// SetRootURL sets the root URL to make requests to.
func (cm *ClientManager) SetRootURL(url string) {
// IsProxyAllowed returns whether the user has allowed us to switch to a proxy if need be.
func (cm *ClientManager) IsProxyAllowed() bool {
cm.urlLocker.Lock()
defer cm.urlLocker.Unlock()
logrus.WithField("url", url).Info("Changing to a new root URL")
cm.url = url
}
// IsProxyAllowed returns whether the user has allowed us to switch to a proxy if need be.
func (cm *ClientManager) IsProxyAllowed() bool {
return cm.allowProxy
}
// AllowProxy allows the client manager to switch clients over to a proxy if need be.
func (cm *ClientManager) AllowProxy() {
cm.urlLocker.Lock()
defer cm.urlLocker.Unlock()
cm.allowProxy = true
}
// DisallowProxy prevents the client manager from switching clients over to a proxy if need be.
func (cm *ClientManager) DisallowProxy() {
cm.urlLocker.Lock()
defer cm.urlLocker.Unlock()
cm.allowProxy = false
cm.url = RootURL
}
// IsProxyEnabled returns whether we are currently proxying requests.
func (cm *ClientManager) IsProxyEnabled() bool {
cm.urlLocker.Lock()
defer cm.urlLocker.Unlock()
return cm.url != RootURL
}
// FindProxy returns a usable proxy server.
func (cm *ClientManager) SwitchToProxy() (proxy string, err error) {
logrus.Info("Attempting gto switch to a proxy")
cm.urlLocker.Lock()
defer cm.urlLocker.Unlock()
logrus.Info("Attempting to switch to a proxy")
if proxy, err = cm.proxyProvider.findProxy(); err != nil {
err = errors.Wrap(err, "failed to find usable proxy")
err = errors.Wrap(err, "failed to find a usable proxy")
return
}
cm.SetRootURL(proxy)
logrus.WithField("proxy", proxy).Info("Switching to a proxy")
// TODO: Disable after 24 hours.
cm.url = proxy
// TODO: Disable again after 24 hours.
return
}
@ -165,7 +188,7 @@ func (cm *ClientManager) GetToken(userID string) string {
// GetBridgeAuthChannel returns a channel on which client auths can be received.
func (cm *ClientManager) GetBridgeAuthChannel() chan ClientAuth {
return cm.clientAuths
return cm.bridgeAuths
}
// getClientAuthChannel returns a channel on which clients should send auths.
@ -176,25 +199,46 @@ func (cm *ClientManager) getClientAuthChannel() chan ClientAuth {
// forwardClientAuths handles all incoming auths from clients before forwarding them on the bridge auth channel.
func (cm *ClientManager) forwardClientAuths() {
for auth := range cm.clientAuths {
logrus.Debug("ClientManager received auth from client")
cm.handleClientAuth(auth)
logrus.Debug("ClientManager is forwarding auth to bridge")
cm.bridgeAuths <- auth
}
}
func (cm *ClientManager) setToken(userID, token string) {
// setToken sets the token for the given userID with the given expiration time.
func (cm *ClientManager) setToken(userID, token string, expiration time.Duration) {
cm.tokensLocker.Lock()
defer cm.tokensLocker.Unlock()
logrus.WithField("userID", userID).Info("Updating refresh token")
logrus.WithField("userID", userID).Info("Updating token")
cm.tokens[userID] = token
cm.setTokenExpiration(userID, expiration)
}
// setTokenExpiration will ensure the token is refreshed if it expires.
// If the token already has an expiration time set, it is replaced.
func (cm *ClientManager) setTokenExpiration(userID string, expiration time.Duration) {
if exp, ok := cm.tokenExpirations[userID]; ok {
exp.timer.Stop()
close(exp.cancel)
}
cm.tokenExpirations[userID] = &tokenExpiration{
timer: time.NewTimer(expiration),
cancel: make(chan struct{}),
}
go cm.watchTokenExpiration(userID)
}
func (cm *ClientManager) clearToken(userID string) {
cm.tokensLocker.Lock()
defer cm.tokensLocker.Unlock()
logrus.WithField("userID", userID).Info("Clearing refresh token")
logrus.WithField("userID", userID).Info("Clearing token")
delete(cm.tokens, userID)
}
@ -203,6 +247,7 @@ func (cm *ClientManager) clearToken(userID string) {
func (cm *ClientManager) handleClientAuth(ca ClientAuth) {
// If we aren't managing this client, there's nothing to do.
if _, ok := cm.clients[ca.UserID]; !ok {
logrus.WithField("userID", ca.UserID).Info("Handling auth for unmanaged client")
return
}
@ -213,5 +258,18 @@ func (cm *ClientManager) handleClientAuth(ca ClientAuth) {
return
}
cm.setToken(ca.UserID, ca.Auth.GenToken())
cm.setToken(ca.UserID, ca.Auth.GenToken(), time.Duration(ca.Auth.ExpiresIn)*time.Second)
}
func (cm *ClientManager) watchTokenExpiration(userID string) {
expiration := cm.tokenExpirations[userID]
select {
case <-expiration.timer.C:
logrus.WithField("userID", userID).Info("Auth token expired! Refreshing")
cm.clients[userID].AuthRefresh(cm.tokens[userID])
case <-expiration.cancel:
logrus.WithField("userID", userID).Info("Auth was refreshed before it expired, cancelling this watcher")
}
}

23
pkg/pmapi/dialer_with_proxy.go
View File

@ -282,13 +282,15 @@ func (p *DialerWithPinning) dialAndCheckFingerprints(network, address string) (c
func (p *DialerWithPinning) dialWithProxyFallback(network, address string) (conn net.Conn, err error) {
p.log.Info("Dialing with proxy fallback")
var host, port string
if host, port, err = net.SplitHostPort(address); err != nil {
// Try to dial, and if it succeeds, then just return.
if conn, err = p.dial(network, address); err == nil {
return
}
// Try to dial, and if it succeeds, then just return.
if conn, err = p.dial(network, address); err == nil {
p.log.WithField("address", address).WithError(err).Error("Dialing failed")
host, port, err := net.SplitHostPort(address)
if err != nil {
return
}
@ -296,18 +298,21 @@ func (p *DialerWithPinning) dialWithProxyFallback(network, address string) (conn
// (e.g. we dial protonmail.com/... to check for updates), there's also no point in
// continuing since a proxy won't help us reach that.
if !p.cm.IsProxyAllowed() || host != p.cm.GetRootURL() {
p.log.WithField("useProxy", p.cm.IsProxyAllowed()).Info("Dial failed but not switching to proxy")
p.log.WithField("address", address).Debug("Aborting dial, cannot switch to a proxy")
return
}
// Switch to a proxy and retry the dial.
var proxy string
if proxy, err = p.cm.SwitchToProxy(); err != nil {
proxy, err := p.cm.SwitchToProxy()
if err != nil {
return
}
return p.dial(network, net.JoinHostPort(proxy, port))
proxyAddress := net.JoinHostPort(proxy, port)
p.log.WithField("address", proxyAddress).Debug("Trying dial again using a proxy")
return p.dial(network, proxyAddress)
}
// dial returns a connection to the given address using the given network.

3
pkg/pmapi/proxy.go
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@ -51,7 +51,6 @@ type proxyProvider struct {
query string // The query string used to find proxies.
proxyCache []string // All known proxies, cached in case DoH providers are unreachable.
useDuration time.Duration // How much time to use the proxy before returning to the original API.
findTimeout, lookupTimeout time.Duration // Timeouts for DNS query and proxy search.
lastLookup time.Time // The time at which we last attempted to find a proxy.
@ -63,7 +62,6 @@ func newProxyProvider(providers []string, query string) (p *proxyProvider) { //
p = &proxyProvider{
providers: providers,
query: query,
useDuration: proxyRevertTime,
findTimeout: proxySearchTimeout,
lookupTimeout: proxyQueryTimeout,
}
@ -148,6 +146,7 @@ func (p *proxyProvider) canReach(url string) bool {
SetTLSClientConfig(&tls.Config{InsecureSkipVerify: true}) // nolint[gosec]
if _, err := pinger.R().Get("/tests/ping"); err != nil {
logrus.WithField("proxy", url).WithError(err).Warn("Failed to ping proxy")
return false
}

3
pkg/pmapi/users.go
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@ -109,7 +109,6 @@ func (c *Client) UpdateUser() (user *User, err error) {
}
c.user = user
c.log.Infoln("update user:", user.ID)
raven.SetUserContext(&raven.User{ID: user.ID})
var tmpList AddressList
@ -117,6 +116,8 @@ func (c *Client) UpdateUser() (user *User, err error) {
c.addresses = tmpList
}
c.log.WithField("userID", user.ID).Info("Updated user")
return user, err
}