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package stfe
import (
"context"
"fmt"
"strings"
"net/http"
"github.com/golang/glog"
"github.com/google/trillian"
"github.com/system-transparency/stfe/types"
)
// Endpoint is a named HTTP API endpoint
type Endpoint string
const (
EndpointAddEntry = Endpoint("add-entry")
EndpointAddCosignature = Endpoint("add-cosignature")
EndpointGetLatestSth = Endpoint("get-latest-sth")
EndpointGetStableSth = Endpoint("get-stable-sth")
EndpointGetCosignedSth = Endpoint("get-cosigned-sth")
EndpointGetProofByHash = Endpoint("get-proof-by-hash")
EndpointGetConsistencyProof = Endpoint("get-consistency-proof")
EndpointGetEntries = Endpoint("get-entries")
)
// Path joins a number of components to form a full endpoint path, e.g., base
// ("example.com"), prefix ("st/v1"), and the endpoint itself ("get-sth").
func (e Endpoint) Path(components ...string) string {
return strings.Join(append(components, string(e)), "/")
}
func addEntry(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
glog.V(3).Info("handling add-entry request")
item, err := i.LogParameters.parseAddEntryV1Request(r)
if err != nil {
return http.StatusBadRequest, fmt.Errorf("parseAddEntryV1Request: %v", err)
}
leaf, err := types.Marshal(*item)
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("Marshal: %v", err) // should never happen
}
trsp, err := i.Client.QueueLeaf(ctx, &trillian.QueueLeafRequest{
LogId: i.LogParameters.TreeId,
Leaf: &trillian.LogLeaf{
LeafValue: leaf,
ExtraData: nil,
},
})
if errInner := checkQueueLeaf(trsp, err); errInner != nil {
return http.StatusInternalServerError, fmt.Errorf("bad QueueLeafResponse: %v", errInner)
}
return http.StatusOK, nil
}
func addCosignature(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
glog.V(3).Info("handling add-cosignature request")
costh, err := i.LogParameters.parseAddCosignatureV1Request(r)
if err != nil {
return http.StatusBadRequest, err
}
if err := i.SthSource.AddCosignature(ctx, costh); err != nil {
return http.StatusBadRequest, err
}
return http.StatusOK, nil
}
func getLatestSth(ctx context.Context, i *Instance, w http.ResponseWriter, _ *http.Request) (int, error) {
glog.V(3).Info("handling get-latest-sth request")
sth, err := i.SthSource.Latest(ctx)
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("Latest: %v", err)
}
if err := writeOctetResponse(w, *sth); err != nil {
return http.StatusInternalServerError, fmt.Errorf("writeOctetResponse: %v", err)
}
return http.StatusOK, nil
}
func getStableSth(ctx context.Context, i *Instance, w http.ResponseWriter, _ *http.Request) (int, error) {
glog.V(3).Info("handling get-stable-sth request")
sth, err := i.SthSource.Stable(ctx)
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("Latest: %v", err)
}
if err := writeOctetResponse(w, *sth); err != nil {
return http.StatusInternalServerError, fmt.Errorf("writeOctetResponse: %v", err)
}
return http.StatusOK, nil
}
func getCosignedSth(ctx context.Context, i *Instance, w http.ResponseWriter, _ *http.Request) (int, error) {
glog.V(3).Info("handling get-cosigned-sth request")
costh, err := i.SthSource.Cosigned(ctx)
if err != nil {
return http.StatusInternalServerError, fmt.Errorf("Cosigned: %v", err)
}
if err := writeOctetResponse(w, *costh); err != nil {
return http.StatusInternalServerError, fmt.Errorf("writeOctetResponse: %v", err)
}
return http.StatusOK, nil
}
func getConsistencyProof(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
glog.V(3).Info("handling get-consistency-proof request")
req, err := i.LogParameters.parseGetConsistencyProofV1Request(r)
if err != nil {
return http.StatusBadRequest, err
}
trsp, err := i.Client.GetConsistencyProof(ctx, &trillian.GetConsistencyProofRequest{
LogId: i.LogParameters.TreeId,
FirstTreeSize: int64(req.First),
SecondTreeSize: int64(req.Second),
})
if errInner := checkGetConsistencyProof(i.LogParameters, trsp, err); errInner != nil {
return http.StatusInternalServerError, fmt.Errorf("bad GetConsistencyProofResponse: %v", errInner)
}
if err := writeOctetResponse(w, *types.NewConsistencyProofV1(i.LogParameters.LogId, req.First, req.Second, NewNodePathFromHashPath(trsp.Proof.Hashes))); err != nil {
return http.StatusInternalServerError, fmt.Errorf("writeOctetResponse: %v", err)
}
return http.StatusOK, nil
}
func getProofByHash(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
glog.V(3).Info("handling get-proof-by-hash request")
req, err := i.LogParameters.parseGetProofByHashV1Request(r)
if err != nil {
return http.StatusBadRequest, err
}
trsp, err := i.Client.GetInclusionProofByHash(ctx, &trillian.GetInclusionProofByHashRequest{
LogId: i.LogParameters.TreeId,
LeafHash: req.Hash[:],
TreeSize: int64(req.TreeSize),
OrderBySequence: true,
})
if errInner := checkGetInclusionProofByHash(i.LogParameters, trsp, err); errInner != nil {
return http.StatusInternalServerError, fmt.Errorf("bad GetInclusionProofByHashResponse: %v", errInner)
}
if err := writeOctetResponse(w, *types.NewInclusionProofV1(i.LogParameters.LogId, req.TreeSize, uint64(trsp.Proof[0].LeafIndex), NewNodePathFromHashPath(trsp.Proof[0].Hashes))); err != nil {
return http.StatusInternalServerError, fmt.Errorf("writeOctetResponse: %v", err)
}
return http.StatusOK, nil
}
func getEntries(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
glog.V(3).Info("handling get-entries request")
req, err := i.LogParameters.parseGetEntriesV1Request(r)
if err != nil {
return http.StatusBadRequest, err
}
trsp, err := i.Client.GetLeavesByRange(ctx, &trillian.GetLeavesByRangeRequest{
LogId: i.LogParameters.TreeId,
StartIndex: int64(req.Start),
Count: int64(req.End-req.Start) + 1,
})
if errInner := checkGetLeavesByRange(req, trsp, err); errInner != nil {
return http.StatusInternalServerError, fmt.Errorf("checkGetLeavesByRangeResponse: %v", errInner) // there is one StatusBadRequest in here tho..
}
if rsp, err := NewStItemListFromLeaves(trsp.Leaves); err != nil {
return http.StatusInternalServerError, fmt.Errorf("NewStItemListFromLeaves: %v", err) // should never happen
} else if err := writeOctetResponse(w, *rsp); err != nil {
return http.StatusInternalServerError, fmt.Errorf("writeOctetResponse: %v", err)
}
return http.StatusOK, nil
}
func writeOctetResponse(w http.ResponseWriter, i interface{}) error {
b, err := types.Marshal(i)
if err != nil {
return fmt.Errorf("Marshal: %v", err)
}
w.Header().Set("Content-Type", "application/octet-stream")
if _, err := w.Write(b); err != nil {
return fmt.Errorf("Write: %v", err)
}
return nil
}
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