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-rw-r--r--handler.go46
-rw-r--r--trillian.go63
2 files changed, 82 insertions, 27 deletions
diff --git a/handler.go b/handler.go
index a09f50a..675c441 100644
--- a/handler.go
+++ b/handler.go
@@ -44,11 +44,11 @@ func (a appHandler) sendHTTPError(w http.ResponseWriter, statusCode int, err err
}
func addEntry(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
- glog.Info("in addEntry")
+ glog.V(3).Info("handling add-entry request")
leaf, appendix, err := NewAddEntryRequest(i.LogParameters, r)
if err != nil {
return http.StatusBadRequest, err
- } // request is well-formed, signed, and chains back to a trust anchor
+ }
treq := trillian.QueueLeafRequest{
LogId: i.LogParameters.TreeId,
@@ -60,14 +60,15 @@ func addEntry(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.R
trsp, err := i.Client.QueueLeaf(ctx, &treq)
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("backend QueueLeaf request failed: %v", err)
- } // note: more detail could be provided here, see addChainInternal in ctfe
- glog.Infof("Queued leaf: %v", trsp.QueuedLeaf.Leaf.LeafValue)
+ }
+ if status, err := checkQueueLeaf(trsp); err != nil {
+ return status, err
+ }
sdi, err := GenV1SDI(i.LogParameters, trsp.QueuedLeaf.Leaf.LeafValue)
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("failed creating signed debug info: %v", err)
}
-
rsp, err := StItemToB64(sdi)
if err != nil {
return http.StatusInternalServerError, err
@@ -80,11 +81,11 @@ func addEntry(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.R
// getEntries provides a list of entries from the Trillian backend
func getEntries(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
- glog.Info("handling get-entries request")
+ glog.V(3).Info("handling get-entries request")
req, err := NewGetEntriesRequest(i.LogParameters, r)
if err != nil {
return http.StatusBadRequest, err
- } // request can be decoded and is mostly valid (range not cmp vs tree size)
+ }
treq := trillian.GetLeavesByRangeRequest{
LogId: i.LogParameters.TreeId,
@@ -95,7 +96,7 @@ func getEntries(ctx context.Context, i *Instance, w http.ResponseWriter, r *http
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("backend GetLeavesByRange request failed: %v", err)
}
- if status, err := checkGetLeavesByRange(trsp, req); err != nil {
+ if status, err := checkGetLeavesByRange(trsp, &req); err != nil {
return status, err
}
@@ -111,7 +112,7 @@ func getEntries(ctx context.Context, i *Instance, w http.ResponseWriter, r *http
// getAnchors provides a list of configured trust anchors
func getAnchors(_ context.Context, i *Instance, w http.ResponseWriter, _ *http.Request) (int, error) {
- glog.Info("in getAnchors")
+ glog.V(3).Info("handling get-anchors request")
data := NewGetAnchorsResponse(i.LogParameters.AnchorList)
if err := WriteJsonResponse(data, w); err != nil {
return http.StatusInternalServerError, err
@@ -121,11 +122,11 @@ func getAnchors(_ context.Context, i *Instance, w http.ResponseWriter, _ *http.R
// getProofByHash provides an inclusion proof based on a given leaf hash
func getProofByHash(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
- glog.Info("in getProofByHash")
+ glog.V(3).Info("handling get-proof-by-hash request")
req, err := NewGetProofByHashRequest(r)
if err != nil {
return http.StatusBadRequest, err
- } // request can be decoded and is valid
+ }
treq := trillian.GetInclusionProofByHashRequest{
LogId: i.LogParameters.TreeId,
@@ -137,13 +138,9 @@ func getProofByHash(ctx context.Context, i *Instance, w http.ResponseWriter, r *
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("failed fetching inclusion proof from Trillian backend: %v", err)
}
- // TODO: check the returned tree size in response?
-
- // Santity check
- if len(trsp.Proof) == 0 {
- return http.StatusNotFound, fmt.Errorf("get-proof-by-hash backend returned no proof")
+ if status, err := checkGetInclusionProofByHash(trsp, i.LogParameters); err != nil {
+ return status, err
}
- // TODO: verify that proof is valid?
rsp, err := StItemToB64(NewInclusionProofV1(i.LogParameters.LogId, uint64(req.TreeSize), trsp.Proof[0]))
if err != nil {
@@ -157,11 +154,11 @@ func getProofByHash(ctx context.Context, i *Instance, w http.ResponseWriter, r *
// getConsistencyProof provides a consistency proof between two STHs
func getConsistencyProof(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
- glog.Info("in getConsistencyProof")
+ glog.V(3).Info("handling get-consistency-proof request")
req, err := NewGetConsistencyProofRequest(r)
if err != nil {
return http.StatusBadRequest, err
- } // request can be decoded and is valid
+ }
treq := trillian.GetConsistencyProofRequest{
LogId: i.LogParameters.TreeId,
@@ -172,7 +169,9 @@ func getConsistencyProof(ctx context.Context, i *Instance, w http.ResponseWriter
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("failed fetching consistency proof from Trillian backend: %v", err)
}
- // TODO: santity-checks?
+ if status, err := checkGetConsistencyProofResponse(trsp, i.LogParameters); err != nil {
+ return status, err
+ }
rsp, err := StItemToB64(NewConsistencyProofV1(i.LogParameters.LogId, req.First, req.Second, trsp.Proof))
if err != nil {
@@ -186,7 +185,7 @@ func getConsistencyProof(ctx context.Context, i *Instance, w http.ResponseWriter
// getSth provides the most recent STH
func getSth(ctx context.Context, i *Instance, w http.ResponseWriter, _ *http.Request) (int, error) {
- glog.Info("in getSth")
+ glog.V(3).Info("handling get-sth request")
treq := trillian.GetLatestSignedLogRootRequest{
LogId: i.LogParameters.TreeId,
}
@@ -194,6 +193,9 @@ func getSth(ctx context.Context, i *Instance, w http.ResponseWriter, _ *http.Req
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("failed fetching signed tree head from Trillian backend: %v", err)
}
+ if status, err := checkTrillianGetLatestSignedLogRoot(trsp, i.LogParameters); err != nil {
+ return status, err
+ }
th, err := NewTreeHeadV1(i.LogParameters, trsp.SignedLogRoot)
if err != nil {
@@ -203,8 +205,6 @@ func getSth(ctx context.Context, i *Instance, w http.ResponseWriter, _ *http.Req
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("failed creating signed tree head: %v", err)
}
- glog.Infof("%v", sth)
-
rsp, err := StItemToB64(sth)
if err != nil {
return http.StatusInternalServerError, err
diff --git a/trillian.go b/trillian.go
index e5117da..147c5bd 100644
--- a/trillian.go
+++ b/trillian.go
@@ -5,28 +5,83 @@ import (
"net/http"
+ "github.com/golang/glog"
"github.com/google/trillian"
"github.com/google/trillian/types"
+ "google.golang.org/grpc/codes"
)
-// checkGetLeavesByRange does santity-checking on a Trillian response
-func checkGetLeavesByRange(rsp *trillian.GetLeavesByRangeResponse, req GetEntriesRequest) (int, error) {
+func checkQueueLeaf(rsp *trillian.QueueLeafResponse) (int, error) {
+ if codes.Code(rsp.QueuedLeaf.GetStatus().GetCode()) == codes.AlreadyExists {
+ // no need to report this as an invalid request, just (re)issue sdi
+ glog.V(3).Infof("queued leaf is a duplicate => %X", rsp.QueuedLeaf.Leaf.LeafValue)
+ } else {
+ glog.V(3).Infof("queued leaf => %X", rsp.QueuedLeaf.Leaf.LeafValue)
+ }
+ return 0, nil
+}
+
+func checkGetLeavesByRange(rsp *trillian.GetLeavesByRangeResponse, req *GetEntriesRequest) (int, error) {
if len(rsp.Leaves) > int(req.End-req.Start+1) {
return http.StatusInternalServerError, fmt.Errorf("backend GetLeavesByRange returned too many leaves: %d for [%d,%d]", len(rsp.Leaves), req.Start, req.End)
}
+ // Ensure that a bad start parameter results in an error
var lr types.LogRootV1
if err := lr.UnmarshalBinary(rsp.GetSignedLogRoot().GetLogRoot()); err != nil {
return http.StatusInternalServerError, fmt.Errorf("failed unmarshaling log root: %v", err)
}
if uint64(req.Start) >= lr.TreeSize {
- return http.StatusBadRequest, fmt.Errorf("invalid start(%d): tree size is %d", req.Start, lr.TreeSize)
+ return http.StatusNotFound, fmt.Errorf("invalid start(%d): tree size is %d", req.Start, lr.TreeSize)
}
+ // Ensure that we got and return expected leaf indices
for i, leaf := range rsp.Leaves {
if leaf.LeafIndex != req.Start+int64(i) {
- return http.StatusInternalServerError, fmt.Errorf("backend GetLeavesByRange returned unexpected leaf index: wanted %d, got %d", req.Start+int64(i), leaf.LeafIndex)
+ return http.StatusInternalServerError, fmt.Errorf("invalid leaf index: wanted %d, got %d", req.Start+int64(i), leaf.LeafIndex)
}
}
return 0, nil
}
+
+func checkGetInclusionProofByHash(rsp *trillian.GetInclusionProofByHashResponse, lp *LogParameters) (int, error) {
+ if rsp.Proof == nil || len(rsp.Proof) == 0 {
+ return http.StatusNotFound, fmt.Errorf("incomplete backend response")
+ } // maybe redundant, but better safe than sorry
+ return checkHashPath(lp.HashType.Size(), rsp.Proof[0].Hashes)
+}
+
+func checkGetConsistencyProofResponse(rsp *trillian.GetConsistencyProofResponse, lp *LogParameters) (int, error) {
+ if rsp.Proof == nil {
+ return http.StatusNotFound, fmt.Errorf("incomplete backend response")
+ } // not redundant, out-of-range parameters yield an empty proof w/o error
+ return checkHashPath(lp.HashType.Size(), rsp.Proof.Hashes)
+}
+
+func checkTrillianGetLatestSignedLogRoot(rsp *trillian.GetLatestSignedLogRootResponse, lp *LogParameters) (int, error) {
+ if rsp.SignedLogRoot == nil {
+ return http.StatusInternalServerError, fmt.Errorf("incomplete backend response")
+ } // maybe redundant
+
+ var lr types.LogRootV1
+ if err := lr.UnmarshalBinary(rsp.GetSignedLogRoot().GetLogRoot()); err != nil {
+ return http.StatusInternalServerError, fmt.Errorf("failed unmarshaling log root: %v", err)
+ }
+ if len(lr.RootHash) != lp.HashType.Size() {
+ return http.StatusInternalServerError, fmt.Errorf("invalid root hash: %v", lr.RootHash)
+ } // maybe redundant, but would not necessarily be caught by marshal error
+ return 0, nil
+}
+
+func checkHashPath(hashSize int, path [][]byte) (int, error) {
+ for _, hash := range path {
+ if len(hash) != hashSize {
+ return http.StatusInternalServerError, fmt.Errorf("invalid proof: %v", path)
+ }
+ } // maybe redundant, but would not necessarily be caught by marshal error
+ return 0, nil
+}
+
+func checkLogRoot(hashSize int, rootHash []byte) (int, error) {
+ return 0, nil
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-03 11:39:34 +0000