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Remove TLS fingerprints, improve perspective unmarshal handling (#1452)

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* Add prefer_direct_fetch option

* Update gomatrixserverlib

* Update gomatrixserverlib

* Update gomatrixserverlib

* Don't deal in TLS fingerprints anymore
This commit is contained in:
Neil Alexander 2020-09-29 17:08:18 +01:00 committed by GitHub
parent 43cdba9a69
commit f290e92a34
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 34 additions and 58 deletions
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5
dendrite-config.yaml
View File

@ -274,6 +274,11 @@ server_key_api:
- key_id: ed25519:a_RXGa
public_key: l8Hft5qXKn1vfHrg3p4+W8gELQVo8N13JkluMfmn2sQ
# This option will control whether Dendrite will prefer to look up keys directly
# or whether it should try perspective servers first, using direct fetches as a
# last resort.
prefer_direct_fetch: false
# Configuration for the Sync API.
sync_api:
internal_api:

1
federationapi/routing/keys.go
View File

@ -136,7 +136,6 @@ func localKeys(cfg *config.FederationAPI, validUntil time.Time) (*gomatrixserver
var keys gomatrixserverlib.ServerKeys
keys.ServerName = cfg.Matrix.ServerName
keys.TLSFingerprints = cfg.TLSFingerPrints
keys.ValidUntilTS = gomatrixserverlib.AsTimestamp(validUntil)
publicKey := cfg.Matrix.PrivateKey.Public().(ed25519.PublicKey)

2
go.mod
View File

@ -22,7 +22,7 @@ require (
github.com/matrix-org/go-http-js-libp2p v0.0.0-20200518170932-783164aeeda4
github.com/matrix-org/go-sqlite3-js v0.0.0-20200522092705-bc8506ccbcf3
github.com/matrix-org/gomatrix v0.0.0-20200827122206-7dd5e2a05bcd
github.com/matrix-org/gomatrixserverlib v0.0.0-20200925165243-b9780a852681
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929155210-32fc5888d26a
github.com/matrix-org/naffka v0.0.0-20200901083833-bcdd62999a91
github.com/matrix-org/util v0.0.0-20200807132607-55161520e1d4
github.com/mattn/go-sqlite3 v1.14.2

10
go.sum
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@ -569,8 +569,14 @@ github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26 h1:Hr3zjRsq2bh
github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26/go.mod h1:3fxX6gUjWyI/2Bt7J1OLhpCzOfO/bB3AiX0cJtEKud0=
github.com/matrix-org/gomatrix v0.0.0-20200827122206-7dd5e2a05bcd h1:xVrqJK3xHREMNjwjljkAUaadalWc0rRbmVuQatzmgwg=
github.com/matrix-org/gomatrix v0.0.0-20200827122206-7dd5e2a05bcd/go.mod h1:/gBX06Kw0exX1HrwmoBibFA98yBk/jxKpGVeyQbff+s=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200925165243-b9780a852681 h1:75fM7vPHiFGt+XxktT17LJD972XMtJ1n7FU1MpC08Zc=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200925165243-b9780a852681/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929152221-6fe6457127ad h1:n0P/Oy8ZqqTPzum6FEayAjamsmvJTuIcA10WQ8GcK70=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929152221-6fe6457127ad/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929154026-a52e7a5f0553 h1:tiel2c3I9xr0SRS05g3UvOjj6Sgg1I3Yn2/oGA1GgLk=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929154026-a52e7a5f0553/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929154241-9414c4d0b5f2 h1:a07U5eFT521mFiUtA/A8NwiZp5vfRU59/QKs+pa3Fkc=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929154241-9414c4d0b5f2/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929155210-32fc5888d26a h1:kIwbS7eY7P/MX0oN4wRHGkoc4eTTnwOcdCawBZ3SrJI=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200929155210-32fc5888d26a/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
github.com/matrix-org/naffka v0.0.0-20200901083833-bcdd62999a91 h1:HJ6U3S3ljJqNffYMcIeAncp5qT/i+ZMiJ2JC2F0aXP4=
github.com/matrix-org/naffka v0.0.0-20200901083833-bcdd62999a91/go.mod h1:sjyPyRxKM5uw1nD2cJ6O2OxI6GOqyVBfNXqKjBZTBZE=
github.com/matrix-org/util v0.0.0-20190711121626-527ce5ddefc7 h1:ntrLa/8xVzeSs8vHFHK25k0C+NV74sYMJnNSg5NoSRo=

29
internal/config/config.go
View File

@ -16,7 +16,6 @@ package config
import (
"bytes"
"crypto/sha256"
"encoding/pem"
"fmt"
"io"
@ -252,20 +251,6 @@ func loadConfig(
c.Global.OldVerifyKeys[i].KeyID, c.Global.OldVerifyKeys[i].PrivateKey = keyID, privateKey
}
for _, certPath := range c.FederationAPI.FederationCertificatePaths {
absCertPath := absPath(basePath, certPath)
var pemData []byte
pemData, err = readFile(absCertPath)
if err != nil {
return nil, err
}
fingerprint := fingerprintPEM(pemData)
if fingerprint == nil {
return nil, fmt.Errorf("no certificate PEM data in %q", absCertPath)
}
c.FederationAPI.TLSFingerPrints = append(c.FederationAPI.TLSFingerPrints, *fingerprint)
}
c.MediaAPI.AbsBasePath = Path(absPath(basePath, c.MediaAPI.BasePath))
// Generate data from config options
@ -494,20 +479,6 @@ func readKeyPEM(path string, data []byte, enforceKeyIDFormat bool) (gomatrixserv
}
}
func fingerprintPEM(data []byte) *gomatrixserverlib.TLSFingerprint {
for {
var certDERBlock *pem.Block
certDERBlock, data = pem.Decode(data)
if data == nil {
return nil
}
if certDERBlock.Type == "CERTIFICATE" {
digest := sha256.Sum256(certDERBlock.Bytes)
return &gomatrixserverlib.TLSFingerprint{SHA256: digest[:]}
}
}
}
// AppServiceURL returns a HTTP URL for where the appservice component is listening.
func (config *Dendrite) AppServiceURL() string {
// Hard code the appservice server to talk HTTP for now.

6
internal/config/config_federationapi.go
View File

@ -1,7 +1,5 @@
package config
import "github.com/matrix-org/gomatrixserverlib"
type FederationAPI struct {
Matrix *Global `yaml:"-"`
@ -14,10 +12,6 @@ type FederationAPI struct {
// to match one of these certificates.
// The certificates should be in PEM format.
FederationCertificatePaths []Path `yaml:"federation_certificates"`
// A list of SHA256 TLS fingerprints for the X509 certificates used by the
// federation listener for this server.
TLSFingerPrints []gomatrixserverlib.TLSFingerprint `yaml:"-"`
}
func (c *FederationAPI) Defaults() {

3
internal/config/config_serverkey.go
View File

@ -14,6 +14,9 @@ type ServerKeyAPI struct {
// Perspective keyservers, to use as a backup when direct key fetch
// requests don't succeed
KeyPerspectives KeyPerspectives `yaml:"key_perspectives"`
// Should we prefer direct key fetches over perspective ones?
PreferDirectFetch bool `yaml:"prefer_direct_fetch"`
}
func (c *ServerKeyAPI) Defaults() {

13
internal/config/config_test.go
View File

@ -253,19 +253,6 @@ Key-ID: ` + testKeyID + `
-----END MATRIX PRIVATE KEY-----
`
func TestFingerprintPEM(t *testing.T) {
got := fingerprintPEM([]byte(testCert))
if got == nil {
t.Error("failed to calculate fingerprint")
}
if string(got.SHA256) != testCertFingerprint {
t.Errorf("bad fingerprint: wanted %q got %q", got, testCertFingerprint)
}
}
const testCertFingerprint = "56.\\SPQxE\xd4\x95\xfb\xf6\xd5\x04\x91\xcb/\x07\xb1^\x88\x08\xe3\xc1p\xdfY\x04\x19w\xcb"
const testCert = `
-----BEGIN CERTIFICATE-----
MIIE0zCCArugAwIBAgIJAPype3u24LJeMA0GCSqGSIb3DQEBCwUAMAAwHhcNMTcw

2
serverkeyapi/internal/api.go
View File

@ -191,7 +191,7 @@ func (s *ServerKeyAPI) handleFetcherKeys(
// Try to fetch the keys.
fetcherResults, err := fetcher.FetchKeys(fetcherCtx, requests)
if err != nil {
return err
return fmt.Errorf("fetcher.FetchKeys: %w", err)
}
// Build a map of the results that we want to commit to the

21
serverkeyapi/serverkeyapi.go
View File

@ -51,15 +51,26 @@ func NewInternalAPI(
ServerKeyValidity: cfg.Matrix.KeyValidityPeriod,
FedClient: fedClient,
OurKeyRing: gomatrixserverlib.KeyRing{
KeyFetchers: []gomatrixserverlib.KeyFetcher{
&gomatrixserverlib.DirectKeyFetcher{
Client: fedClient,
},
},
KeyFetchers: []gomatrixserverlib.KeyFetcher{},
KeyDatabase: serverKeyDB,
},
}
addDirectFetcher := func() {
internalAPI.OurKeyRing.KeyFetchers = append(
internalAPI.OurKeyRing.KeyFetchers,
&gomatrixserverlib.DirectKeyFetcher{
Client: fedClient,
},
)
}
if cfg.PreferDirectFetch {
addDirectFetcher()
} else {
defer addDirectFetcher()
}
var b64e = base64.StdEncoding.WithPadding(base64.NoPadding)
for _, ps := range cfg.KeyPerspectives {
perspective := &gomatrixserverlib.PerspectiveKeyFetcher{