1 files changed, 69 insertions, 0 deletions
diff --git a/pkg/instance/instance.go b/pkg/instance/instance.go
index 3441a0a..c2fe8fa 100644
--- a/pkg/instance/instance.go
+++ b/pkg/instance/instance.go
@@ -3,6 +3,7 @@ package stfe
 import (
 	"context"
 	"crypto"
+	"crypto/ed25519"
 	"fmt"
 	"net/http"
 	"time"
@@ -88,3 +89,71 @@ func (a Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, fmt.Sprintf("%s%s%s%s", "Error", types.Delim, err.Error(), types.EOL), statusCode)
 	}
 }
+
+func (i *Instance) leafRequestFromHTTP(r *http.Request) (*types.LeafRequest, error) {
+	var req types.LeafRequest
+	if err := req.UnmarshalASCII(r.Body); err != nil {
+		return nil, fmt.Errorf("UnmarshalASCII: %v", err)
+	}
+
+	vk := ed25519.PublicKey(req.VerificationKey[:])
+	msg := req.Message.Marshal()
+	sig := req.Signature[:]
+	if !ed25519.Verify(vk, msg, sig) {
+		return nil, fmt.Errorf("invalid signature")
+	}
+	// TODO: check shard hint
+	// TODO: check domain hint
+	return &req, nil
+}
+
+func (i *Instance) cosignatureRequestFromHTTP(r *http.Request) (*types.CosignatureRequest, error) {
+	var req types.CosignatureRequest
+	if err := req.UnmarshalASCII(r.Body); err != nil {
+		return nil, fmt.Errorf("unpackOctetPost: %v", err)
+	}
+	if _, ok := i.Witnesses[*req.KeyHash]; !ok {
+		return nil, fmt.Errorf("Unknown witness: %x", req.KeyHash)
+	}
+	return &req, nil
+}
+
+func (i *Instance) consistencyProofRequestFromHTTP(r *http.Request) (*types.ConsistencyProofRequest, error) {
+	var req types.ConsistencyProofRequest
+	if err := req.UnmarshalASCII(r.Body); err != nil {
+		return nil, fmt.Errorf("UnmarshalASCII: %v", err)
+	}
+	if req.OldSize < 1 {
+		return nil, fmt.Errorf("OldSize(%d) must be larger than zero", req.OldSize)
+	}
+	if req.NewSize <= req.OldSize {
+		return nil, fmt.Errorf("NewSize(%d) must be larger than OldSize(%d)", req.NewSize, req.OldSize)
+	}
+	return &req, nil
+}
+
+func (i *Instance) inclusionProofRequestFromHTTP(r *http.Request) (*types.InclusionProofRequest, error) {
+	var req types.InclusionProofRequest
+	if err := req.UnmarshalASCII(r.Body); err != nil {
+		return nil, fmt.Errorf("UnmarshalASCII: %v", err)
+	}
+	if req.TreeSize < 1 {
+		return nil, fmt.Errorf("TreeSize(%d) must be larger than zero", req.TreeSize)
+	}
+	return &req, nil
+}
+
+func (i *Instance) leavesRequestFromHTTP(r *http.Request) (*types.LeavesRequest, error) {
+	var req types.LeavesRequest
+	if err := req.UnmarshalASCII(r.Body); err != nil {
+		return nil, fmt.Errorf("UnmarshalASCII: %v", err)
+	}
+
+	if req.StartSize > req.EndSize {
+		return nil, fmt.Errorf("StartSize(%d) must be less than or equal to EndSize(%d)", req.StartSize, req.EndSize)
+	}
+	if req.EndSize-req.StartSize+1 > uint64(i.MaxRange) {
+		req.EndSize = req.StartSize + uint64(i.MaxRange) - 1
+	}
+	return &req, nil
+}