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federated authentication better logging + tidying (#232)

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* change trace logging in authenticator

* messing about

* lil changes

* go fmt

* error fix

* Fix broken test
This commit is contained in:
tobi 2021-09-16 11:35:09 +02:00 committed by GitHub
parent 2e5dcc2929
commit 92186c8c6f
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
13 changed files with 134 additions and 123 deletions
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59
internal/api/s2s/user/common.go Normal file
View file

@ -0,0 +1,59 @@
/*
GoToSocial
Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package user
import (
"context"
"fmt"
"github.com/gin-gonic/gin"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// ActivityPubAcceptHeaders represents the Accept headers mentioned here:
// https://www.w3.org/TR/activitypub/#retrieving-objects
var ActivityPubAcceptHeaders = []string{
`application/activity+json`,
`application/ld+json; profile="https://www.w3.org/ns/activitystreams"`,
}
// populateContext transfers the signature verifier and signature from the gin context to the request context
func populateContext(c *gin.Context) context.Context {
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
signature, signed := c.Get(string(util.APRequestingPublicKeySignature))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeySignature, signature)
}
return ctx
}
func negotiateFormat(c *gin.Context) (string, error) {
format := c.NegotiateFormat(ActivityPubAcceptHeaders...)
if format == "" {
return "", fmt.Errorf("no format can be offered for Accept headers %s", c.Request.Header.Get("Accept"))
}
return format, nil
}

24
internal/api/s2s/user/followers.go
View file

@ -19,14 +19,12 @@
package user
import (
"context"
"encoding/json"
"fmt"
"net/http"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// FollowersGETHandler returns a collection of URIs for followers of the target user, formatted so that other AP servers can understand it.
@ -42,25 +40,19 @@ func (m *Module) FollowersGETHandler(c *gin.Context) {
return
}
// make sure this actually an AP request
format := c.NegotiateFormat(ActivityPubAcceptHeaders...)
if format == "" {
c.JSON(http.StatusNotAcceptable, gin.H{"error": "could not negotiate format with given Accept header(s)"})
format, err := negotiateFormat(c)
if err != nil {
c.JSON(http.StatusNotAcceptable, gin.H{"error": fmt.Sprintf("could not negotiate format with given Accept header(s): %s", err)})
return
}
l.Tracef("negotiated format: %s", format)
// transfer the signature verifier from the gin context to the request context
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
ctx := populateContext(c)
followers, err := m.processor.GetFediFollowers(ctx, requestedUsername, c.Request.URL) // GetFediUser handles auth as well
if err != nil {
l.Info(err.Error())
c.JSON(err.Code(), gin.H{"error": err.Safe()})
followers, errWithCode := m.processor.GetFediFollowers(ctx, requestedUsername, c.Request.URL)
if errWithCode != nil {
l.Info(errWithCode.Error())
c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
return
}

24
internal/api/s2s/user/following.go
View file

@ -19,14 +19,12 @@
package user
import (
"context"
"encoding/json"
"fmt"
"net/http"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// FollowingGETHandler returns a collection of URIs for accounts that the target user follows, formatted so that other AP servers can understand it.
@ -42,25 +40,19 @@ func (m *Module) FollowingGETHandler(c *gin.Context) {
return
}
// make sure this actually an AP request
format := c.NegotiateFormat(ActivityPubAcceptHeaders...)
if format == "" {
c.JSON(http.StatusNotAcceptable, gin.H{"error": "could not negotiate format with given Accept header(s)"})
format, err := negotiateFormat(c)
if err != nil {
c.JSON(http.StatusNotAcceptable, gin.H{"error": fmt.Sprintf("could not negotiate format with given Accept header(s): %s", err)})
return
}
l.Tracef("negotiated format: %s", format)
// transfer the signature verifier from the gin context to the request context
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
ctx := populateContext(c)
following, err := m.processor.GetFediFollowing(ctx, requestedUsername, c.Request.URL) // handles auth as well
if err != nil {
l.Info(err.Error())
c.JSON(err.Code(), gin.H{"error": err.Safe()})
following, errWithCode := m.processor.GetFediFollowing(ctx, requestedUsername, c.Request.URL)
if errWithCode != nil {
l.Info(errWithCode.Error())
c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
return
}

9
internal/api/s2s/user/inboxpost.go
View file

@ -19,13 +19,11 @@
package user
import (
"context"
"net/http"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// InboxPOSTHandler deals with incoming POST requests to an actor's inbox.
@ -42,12 +40,7 @@ func (m *Module) InboxPOSTHandler(c *gin.Context) {
return
}
// transfer the signature verifier from the gin context to the request context
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
ctx := populateContext(c)
posted, err := m.processor.InboxPost(ctx, c.Writer, c.Request)
if err != nil {

24
internal/api/s2s/user/publickeyget.go
View file

@ -1,14 +1,12 @@
package user
import (
"context"
"encoding/json"
"fmt"
"net/http"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// PublicKeyGETHandler should be served at eg https://example.org/users/:username/main-key.
@ -28,25 +26,19 @@ func (m *Module) PublicKeyGETHandler(c *gin.Context) {
return
}
// make sure this actually an AP request
format := c.NegotiateFormat(ActivityPubAcceptHeaders...)
if format == "" {
c.JSON(http.StatusNotAcceptable, gin.H{"error": "could not negotiate format with given Accept header(s)"})
format, err := negotiateFormat(c)
if err != nil {
c.JSON(http.StatusNotAcceptable, gin.H{"error": fmt.Sprintf("could not negotiate format with given Accept header(s): %s", err)})
return
}
l.Tracef("negotiated format: %s", format)
// transfer the signature verifier from the gin context to the request context
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
ctx := populateContext(c)
user, err := m.processor.GetFediUser(ctx, requestedUsername, c.Request.URL) // GetFediUser handles auth as well
if err != nil {
l.Info(err.Error())
c.JSON(err.Code(), gin.H{"error": err.Safe()})
user, errWithCode := m.processor.GetFediUser(ctx, requestedUsername, c.Request.URL)
if errWithCode != nil {
l.Info(errWithCode.Error())
c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
return
}

24
internal/api/s2s/user/repliesget.go
View file

@ -1,7 +1,6 @@
package user
import (
"context"
"encoding/json"
"fmt"
"net/http"
@ -9,7 +8,6 @@ import (
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// StatusRepliesGETHandler swagger:operation GET /users/{username}/statuses/{status}/replies s2sRepliesGet
@ -116,25 +114,19 @@ func (m *Module) StatusRepliesGETHandler(c *gin.Context) {
minID = minIDString
}
// make sure this actually an AP request
format := c.NegotiateFormat(ActivityPubAcceptHeaders...)
if format == "" {
c.JSON(http.StatusNotAcceptable, gin.H{"error": "could not negotiate format with given Accept header(s)"})
format, err := negotiateFormat(c)
if err != nil {
c.JSON(http.StatusNotAcceptable, gin.H{"error": fmt.Sprintf("could not negotiate format with given Accept header(s): %s", err)})
return
}
l.Tracef("negotiated format: %s", format)
// transfer the signature verifier from the gin context to the request context
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
ctx := populateContext(c)
replies, err := m.processor.GetFediStatusReplies(ctx, requestedUsername, requestedStatusID, page, onlyOtherAccounts, minID, c.Request.URL)
if err != nil {
l.Info(err.Error())
c.JSON(err.Code(), gin.H{"error": err.Safe()})
replies, errWithCode := m.processor.GetFediStatusReplies(ctx, requestedUsername, requestedStatusID, page, onlyOtherAccounts, minID, c.Request.URL)
if errWithCode != nil {
l.Info(errWithCode.Error())
c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
return
}

24
internal/api/s2s/user/statusget.go
View file

@ -1,14 +1,12 @@
package user
import (
"context"
"encoding/json"
"fmt"
"net/http"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// StatusGETHandler serves the target status as an activitystreams NOTE so that other AP servers can parse it.
@ -30,25 +28,19 @@ func (m *Module) StatusGETHandler(c *gin.Context) {
return
}
// make sure this actually an AP request
format := c.NegotiateFormat(ActivityPubAcceptHeaders...)
if format == "" {
c.JSON(http.StatusNotAcceptable, gin.H{"error": "could not negotiate format with given Accept header(s)"})
format, err := negotiateFormat(c)
if err != nil {
c.JSON(http.StatusNotAcceptable, gin.H{"error": fmt.Sprintf("could not negotiate format with given Accept header(s): %s", err)})
return
}
l.Tracef("negotiated format: %s", format)
// transfer the signature verifier from the gin context to the request context
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
ctx := populateContext(c)
status, err := m.processor.GetFediStatus(ctx, requestedUsername, requestedStatusID, c.Request.URL) // handles auth as well
if err != nil {
l.Info(err.Error())
c.JSON(err.Code(), gin.H{"error": err.Safe()})
status, errWithCode := m.processor.GetFediStatus(ctx, requestedUsername, requestedStatusID, c.Request.URL)
if errWithCode != nil {
l.Info(errWithCode.Error())
c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
return
}

7
internal/api/s2s/user/user.go
View file

@ -61,13 +61,6 @@ const (
UsersStatusRepliesPath = UsersStatusPath + "/replies"
)
// ActivityPubAcceptHeaders represents the Accept headers mentioned here:
// https://www.w3.org/TR/activitypub/#retrieving-objects
var ActivityPubAcceptHeaders = []string{
`application/activity+json`,
`application/ld+json; profile="https://www.w3.org/ns/activitystreams"`,
}
// Module implements the FederationAPIModule interface
type Module struct {
config *config.Config

24
internal/api/s2s/user/userget.go
View file

@ -19,14 +19,12 @@
package user
import (
"context"
"encoding/json"
"fmt"
"net/http"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// UsersGETHandler should be served at https://example.org/users/:username.
@ -50,25 +48,19 @@ func (m *Module) UsersGETHandler(c *gin.Context) {
return
}
// make sure this actually an AP request
format := c.NegotiateFormat(ActivityPubAcceptHeaders...)
if format == "" {
c.JSON(http.StatusNotAcceptable, gin.H{"error": "could not negotiate format with given Accept header(s)"})
format, err := negotiateFormat(c)
if err != nil {
c.JSON(http.StatusNotAcceptable, gin.H{"error": fmt.Sprintf("could not negotiate format with given Accept header(s): %s", err)})
return
}
l.Tracef("negotiated format: %s", format)
// transfer the signature verifier from the gin context to the request context
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
ctx := populateContext(c)
user, err := m.processor.GetFediUser(ctx, requestedUsername, c.Request.URL) // GetFediUser handles auth as well
if err != nil {
l.Info(err.Error())
c.JSON(err.Code(), gin.H{"error": err.Safe()})
user, errWithCode := m.processor.GetFediUser(ctx, requestedUsername, c.Request.URL) // GetFediUser handles auth as well
if errWithCode != nil {
l.Info(errWithCode.Error())
c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
return
}

11
internal/api/security/signaturecheck.go
View file

@ -11,13 +11,10 @@ import (
// SignatureCheck checks whether an incoming http request has been signed. If so, it will check if the domain
// that signed the request is permitted to access the server. If it is permitted, the handler will set the key
// verifier in the gin context for use down the line.
// verifier and the signature in the gin context for use down the line.
func (m *Module) SignatureCheck(c *gin.Context) {
l := m.log.WithField("func", "DomainBlockChecker")
// set this extra field for signature validation
c.Request.Header.Set("host", m.config.Host)
// create the verifier from the request
// if the request is signed, it will have a signature header
verifier, err := httpsig.NewVerifier(c.Request)
@ -43,8 +40,12 @@ func (m *Module) SignatureCheck(c *gin.Context) {
return
}
// set the verifier on the context here to save some work further down the line
// set the verifier and signature on the context here to save some work further down the line
c.Set(string(util.APRequestingPublicKeyVerifier), verifier)
signature := c.GetHeader("Signature")
if signature != "" {
c.Set(string(util.APRequestingPublicKeySignature), signature)
}
}
}
}

22
internal/federation/authenticate.go
View file

@ -102,10 +102,6 @@ func getPublicKeyFromResponse(c context.Context, b []byte, keyID *url.URL) (voca
// Authenticate in this case is defined as making sure that the http request is actually signed by whoever claims
// to have signed it, by fetching the public key from the signature and checking it against the remote public key.
//
// To avoid making unnecessary http calls towards blocked domains, this function *does* bail early if an instance-level domain block exists
// for the request from the incoming domain. However, it does not check whether individual blocks exist between the requesting user or domain
// and the requested user: this should be done elsewhere.
//
// The provided username will be used to generate a transport for making remote requests/derefencing the public key ID of the request signature.
// Ideally you should pass in the username of the user *being requested*, so that the remote server can decide how to handle the request based on who's making it.
// Ie., if the request on this server is for https://example.org/users/some_username then you should pass in the username 'some_username'.
@ -135,6 +131,19 @@ func (f *federator) AuthenticateFederatedRequest(ctx context.Context, requestedU
return nil, false, nil // couldn't extract the verifier
}
// we should have the signature itself set too
si := ctx.Value(util.APRequestingPublicKeySignature)
if vi == nil {
l.Debug("request wasn't signed")
return nil, false, nil // request wasn't signed
}
signature, ok := si.(string)
if !ok {
l.Debug("couldn't extract signature")
return nil, false, nil // couldn't extract the signature
}
requestingPublicKeyID, err := url.Parse(verifier.KeyId())
if err != nil {
l.Debug("couldn't parse public key URL")
@ -227,13 +236,14 @@ func (f *federator) AuthenticateFederatedRequest(ctx context.Context, requestedU
for _, algo := range algos {
l.Tracef("trying algo: %s", algo)
if err := verifier.Verify(publicKey, algo); err == nil {
err := verifier.Verify(publicKey, algo)
if err == nil {
l.Tracef("authentication for %s PASSED with algorithm %s", pkOwnerURI, algo)
return pkOwnerURI, true, nil
}
l.Tracef("authentication for %s NOT PASSED with algorithm %s: %s", pkOwnerURI, algo, err)
}
l.Infof("authentication not passed for %s", pkOwnerURI)
l.Infof("authentication not passed for public key owner %s; signature value was '%s'", pkOwnerURI, signature)
return nil, false, nil
}

3
internal/federation/federator_test.go
View file

@ -128,12 +128,13 @@ func (suite *ProtocolTestSuite) TestAuthenticatePostInbox() {
ctxWithAccount := context.WithValue(ctx, util.APAccount, inboxAccount)
ctxWithActivity := context.WithValue(ctxWithAccount, util.APActivity, activity)
ctxWithVerifier := context.WithValue(ctxWithActivity, util.APRequestingPublicKeyVerifier, verifier)
ctxWithSignature := context.WithValue(ctxWithVerifier, util.APRequestingPublicKeySignature, activity.SignatureHeader)
// we can pass this recorder as a writer and read it back after
recorder := httptest.NewRecorder()
// trigger the function being tested, and return the new context it creates
newContext, authed, err := federator.AuthenticatePostInbox(ctxWithVerifier, recorder, request)
newContext, authed, err := federator.AuthenticatePostInbox(ctxWithSignature, recorder, request)
assert.NoError(suite.T(), err)
assert.True(suite.T(), authed)

2
internal/util/uri.go
View file

@ -72,6 +72,8 @@ const (
APRequestingActorIRI APContextKey = "requestingActorIRI"
// APRequestingPublicKeyVerifier can be used to set and retrieve the public key verifier of an incoming federation request.
APRequestingPublicKeyVerifier APContextKey = "requestingPublicKeyVerifier"
// APRequestingPublicKeySignature can be used to set and retrieve the value of the signature header of an incoming federation request.
APRequestingPublicKeySignature APContextKey = "requestingPublicKeySignature"
// APFromFederatorChanKey can be used to pass a pointer to the fromFederator channel into the federator for use in callbacks.
APFromFederatorChanKey APContextKey = "fromFederatorChan"
)