dendrite/serverkeyapi/api/api.go
Neil Alexander d785ad82b9
Add key validity fetching to server key API (#1094)
* Add key validity checks

* Store fetched keys

* Don't double-cache key results

* Perform server key API operations using new context

* Revert "Perform server key API operations using new context"

This reverts commit 02172223f5.

* Perform server key API operations using new context
2020-06-04 15:40:23 +01:00

125 lines
3.7 KiB
Go

package api
import (
"context"
"errors"
"net/http"
"time"
"github.com/matrix-org/dendrite/internal/caching"
"github.com/matrix-org/gomatrixserverlib"
)
type ServerKeyInternalAPI interface {
gomatrixserverlib.KeyDatabase
KeyRing() *gomatrixserverlib.KeyRing
InputPublicKeys(
ctx context.Context,
request *InputPublicKeysRequest,
response *InputPublicKeysResponse,
) error
QueryPublicKeys(
ctx context.Context,
request *QueryPublicKeysRequest,
response *QueryPublicKeysResponse,
) error
}
// NewRoomserverInputAPIHTTP creates a RoomserverInputAPI implemented by talking to a HTTP POST API.
// If httpClient is nil an error is returned
func NewServerKeyInternalAPIHTTP(
serverKeyAPIURL string,
httpClient *http.Client,
immutableCache caching.ImmutableCache,
) (ServerKeyInternalAPI, error) {
if httpClient == nil {
return nil, errors.New("NewRoomserverInternalAPIHTTP: httpClient is <nil>")
}
return &httpServerKeyInternalAPI{
serverKeyAPIURL: serverKeyAPIURL,
httpClient: httpClient,
immutableCache: immutableCache,
}, nil
}
type httpServerKeyInternalAPI struct {
ServerKeyInternalAPI
serverKeyAPIURL string
httpClient *http.Client
immutableCache caching.ImmutableCache
}
func (s *httpServerKeyInternalAPI) KeyRing() *gomatrixserverlib.KeyRing {
// This is a bit of a cheat - we tell gomatrixserverlib that this API is
// both the key database and the key fetcher. While this does have the
// rather unfortunate effect of preventing gomatrixserverlib from handling
// key fetchers directly, we can at least reimplement this behaviour on
// the other end of the API.
return &gomatrixserverlib.KeyRing{
KeyDatabase: s,
KeyFetchers: []gomatrixserverlib.KeyFetcher{s},
}
}
func (s *httpServerKeyInternalAPI) FetcherName() string {
return "httpServerKeyInternalAPI"
}
func (s *httpServerKeyInternalAPI) StoreKeys(
_ context.Context,
results map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult,
) error {
// Run in a background context - we don't want to stop this work just
// because the caller gives up waiting.
ctx := context.Background()
request := InputPublicKeysRequest{
Keys: make(map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult),
}
response := InputPublicKeysResponse{}
for req, res := range results {
request.Keys[req] = res
s.immutableCache.StoreServerKey(req, res)
}
return s.InputPublicKeys(ctx, &request, &response)
}
func (s *httpServerKeyInternalAPI) FetchKeys(
_ context.Context,
requests map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.Timestamp,
) (map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult, error) {
// Run in a background context - we don't want to stop this work just
// because the caller gives up waiting.
ctx := context.Background()
result := make(map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult)
request := QueryPublicKeysRequest{
Requests: make(map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.Timestamp),
}
response := QueryPublicKeysResponse{
Results: make(map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult),
}
now := gomatrixserverlib.AsTimestamp(time.Now())
for req, ts := range requests {
if res, ok := s.immutableCache.GetServerKey(req); ok {
if now > res.ValidUntilTS && res.ExpiredTS == gomatrixserverlib.PublicKeyNotExpired {
continue
}
result[req] = res
continue
}
request.Requests[req] = ts
}
err := s.QueryPublicKeys(ctx, &request, &response)
if err != nil {
return nil, err
}
for req, res := range response.Results {
result[req] = res
s.immutableCache.StoreServerKey(req, res)
}
return result, nil
}