Moved to x25519 for EC operations

context.go

@@ -7,7 +7,6 @@ import (
   "errors"
   "runtime"
   "crypto/sha512"
-  "crypto/elliptic"
   "crypto/ecdh"
   "encoding/binary"
 )
@@ -112,8 +111,6 @@ type Context struct {
   Signals map[uint64]SignalInfo
   // Map between database type hashes and the registered info
   Types map[uint64]*NodeInfo
-  // Curve used for signature operations
-  ECDSA elliptic.Curve
   // Curve used for ecdh operations
   ECDH ecdh.Curve
   // Routing map to all the nodes local to this context
@@ -252,8 +249,7 @@ func NewContext(db * badger.DB, log Logger) (*Context, error) {
     Types: map[uint64]*NodeInfo{},
     Signals: map[uint64]SignalInfo{},
     Nodes: map[NodeID]*Node{},
-    ECDH: ecdh.P256(),
-    ECDSA: elliptic.P256(),
+    ECDH: ecdh.X25519(),
   }
 
   var err error
@@ -293,6 +289,16 @@ func NewContext(db * badger.DB, log Logger) (*Context, error) {
     return nil, err
   }
 
+  err = RegisterSignal[BaseSignal, *BaseSignal](ctx, NewSignalType)
+  if err != nil {
+    return nil, err
+  }
+
+  err = RegisterSignal[BaseSignal, *BaseSignal](ctx, StartSignalType)
+  if err != nil {
+    return nil, err
+  }
+
   err = ctx.RegisterNodeType(GQLNodeType, []ExtType{ACLExtType, GroupExtType, GQLExtType})
   if err != nil {
     return nil, err

gql.go

@@ -18,7 +18,7 @@ import (
   "github.com/gobwas/ws/wsutil"
   "strings"
   "crypto/ecdh"
-  "crypto/ecdsa"
+  "crypto/ed25519"
   "crypto/elliptic"
   "crypto/rand"
   "crypto/x509"
@@ -185,7 +185,7 @@ type ResolveContext struct {
 
   // Key for the user that made this request, to sign resolver requests
   // TODO: figure out some way to use a generated key so that the server can't impersonate the user afterwards
-  Key *ecdsa.PrivateKey
+  Key ed25519.PrivateKey
 }
 
 func NewResolveContext(ctx *Context, server *Node, gql_ext *GQLExt, r *http.Request) (*ResolveContext, error) {
@@ -199,12 +199,20 @@ func NewResolveContext(ctx *Context, server *Node, gql_ext *GQLExt, r *http.Requ
     return nil, fmt.Errorf("GQL_REQUEST_ERR: failed to parse ID from auth username: %s", username)
   }
 
-  key, err := x509.ParseECPrivateKey([]byte(key_bytes))
+  key_raw, err := x509.ParsePKCS8PrivateKey([]byte(key_bytes))
   if err != nil {
     return nil, fmt.Errorf("GQL_REQUEST_ERR: failed to parse ecdsa key from auth password: %s", key_bytes)
   }
 
-  key_id := KeyID(&key.PublicKey)
+  var key ed25519.PrivateKey
+  switch k := key_raw.(type) {
+  case ed25519.PrivateKey:
+    key = k
+  default:
+    return nil, fmt.Errorf("GQL_REQUEST_ERR: wrong type for key: %s", reflect.TypeOf(key_raw))
+  }
+
+  key_id := KeyID(key.Public().(ed25519.PublicKey))
   if auth_id != key_id {
     return nil, fmt.Errorf("GQL_REQUEST_ERR: key_id(%s) != auth_id(%s)", auth_id, key_id)
   }
@@ -1144,12 +1152,12 @@ func (ext *GQLExt) Deserialize(ctx *Context, data []byte) error {
 
 func NewGQLExt(ctx *Context, listen string, tls_cert []byte, tls_key []byte, state string) (*GQLExt, error) {
   if tls_cert == nil || tls_key == nil {
-    ssl_key, err := ecdsa.GenerateKey(ctx.ECDSA, rand.Reader)
+    _, ssl_key, err := ed25519.GenerateKey(rand.Reader)
     if err != nil {
       return nil, err
     }
 
-    ssl_key_bytes, err := x509.MarshalECPrivateKey(ssl_key)
+    ssl_key_bytes, err := x509.MarshalPKCS8PrivateKey(ssl_key)
     if err != nil {
       return nil, err
     }
@@ -1172,7 +1180,7 @@ func NewGQLExt(ctx *Context, listen string, tls_cert []byte, tls_key []byte, sta
       BasicConstraintsValid: true,
     }
 
-    ssl_cert, err := x509.CreateCertificate(rand.Reader, &template, &template, &ssl_key.PublicKey, ssl_key)
+    ssl_cert, err := x509.CreateCertificate(rand.Reader, &template, &template, ssl_key.Public(), ssl_key)
     if err != nil {
       return nil, err
     }

gql_test.go

@@ -68,7 +68,7 @@ func TestGQL(t *testing.T) {
     req, err := http.NewRequest("GET", url, req_data)
     fatalErr(t, err)
 
-    key_bytes, err := x509.MarshalECPrivateKey(n1.Key)
+    key_bytes, err := x509.MarshalPKCS8PrivateKey(n1.Key)
     fatalErr(t, err)
     req.SetBasicAuth(n1.ID.String(), string(key_bytes))
     resp, err := client.Do(req)

node.go

@@ -10,8 +10,7 @@ import (
   "encoding/binary"
   "encoding/json"
   "sync/atomic"
-  "crypto/ecdsa"
-  "crypto/elliptic"
+  "crypto/ed25519"
   "crypto/sha512"
   "crypto/rand"
   "crypto/x509"
@@ -23,6 +22,7 @@ const (
   // Total length of the node database header, has magic to verify and type_hash to map to load function
   NODE_DB_HEADER_LEN = 28
   EXTENSION_DB_HEADER_LEN = 16
+  QSIGNAL_DB_HEADER_LEN = 40
 )
 
 var (
@@ -106,7 +106,7 @@ type QueuedSignal struct {
 // Default message channel size for nodes
 // Nodes represent a group of extensions that can be collectively addressed
 type Node struct {
-  Key *ecdsa.PrivateKey
+  Key ed25519.PrivateKey
   ID NodeID
   Type NodeType
   Extensions map[ExtType]Extension
@@ -197,14 +197,15 @@ func nodeLoop(ctx *Context, node *Node) error {
     return fmt.Errorf("%s is already started, will not start again", node.ID)
   }
 
-  // Queue the signal for extensions to perform startup actions
-  node.QueueSignal(time.Now(), &StartSignal)
+  // Perform startup actions
+  node.Process(ctx, node.ID, &StartSignal)
 
   for true {
     var signal Signal
     var source NodeID
     select {
     case msg := <- node.MsgChan:
+      ctx.Log.Logf("signal", "NODE_MSG: %s - %+v", node.ID, msg)
       signal = msg.Signal
       source = msg.Source
       err := Allowed(ctx, msg.Source, signal.Permission(), node)
@@ -234,7 +235,7 @@ func nodeLoop(ctx *Context, node *Node) error {
 
       node.NextSignal, node.TimeoutChan = SoonestSignal(node.SignalQueue)
       if node.NextSignal == nil {
-        ctx.Log.Logf("node", "NODE_TIMEOUT(%s) - PROCESSING %+v@%s - NEXT_SIGNAL nil", node.ID, t, signal)
+        ctx.Log.Logf("node", "NODE_TIMEOUT(%s) - PROCESSING %+v@%s - NEXT_SIGNAL nil@%+v", node.ID, t, signal, node.TimeoutChan)
       } else {
         ctx.Log.Logf("node", "NODE_TIMEOUT(%s) - PROCESSING %+v@%s - NEXT_SIGNAL: %s@%s", node.ID, t, signal, node.NextSignal, node.NextSignal.Time)
       }
@@ -250,8 +251,7 @@ func nodeLoop(ctx *Context, node *Node) error {
         sig_data, err := sig.Signal.Serialize()
         if err != nil {
         } else {
-          sig_hash := sha512.Sum512(sig_data)
-          validated := ecdsa.VerifyASN1(sig.Principal, sig_hash[:], sig.Signature)
+          validated := ed25519.Verify(sig.Principal, sig_data, sig.Signature)
           if validated == true {
             err := Allowed(ctx, KeyID(sig.Principal), sig.Signal.Permission(), node)
             if err != nil {
@@ -271,6 +271,8 @@ func nodeLoop(ctx *Context, node *Node) error {
       }
     }
 
+    ctx.Log.Logf("node", "NODE_SIGNAL_QUEUE[%s]: %+v", node.ID, node.SignalQueue)
+
     // Handle special signal types
     if signal.Type() == StopSignalType {
       resp := NewErrorSignal(signal.ID(), "stopped")
@@ -349,8 +351,9 @@ func GetExt[T Extension](node *Node) (T, error) {
 
 func (node *Node) Serialize() ([]byte, error) {
   extensions := make([]ExtensionDB, len(node.Extensions))
+  qsignals := make([]QSignalDB, len(node.SignalQueue))
 
-  key_bytes, err := x509.MarshalECPrivateKey(node.Key)
+  key_bytes, err := x509.MarshalPKCS8PrivateKey(node.Key)
   if err != nil {
     return nil, err
   }
@@ -365,7 +368,7 @@ func (node *Node) Serialize() ([]byte, error) {
       NumQueuedSignals: uint32(len(node.SignalQueue)),
     },
     Extensions: extensions,
-    QueuedSignals: node.SignalQueue,
+    QueuedSignals: qsignals,
     KeyBytes: key_bytes,
   }
 
@@ -385,26 +388,45 @@ func (node *Node) Serialize() ([]byte, error) {
     i += 1
   }
 
+  for i, qsignal := range(node.SignalQueue) {
+    ser, err := qsignal.Signal.Serialize()
+    if err != nil {
+      return nil, err
+    }
+
+    node_db.QueuedSignals[i] = QSignalDB{
+      QSignalDBHeader{
+        qsignal.Signal.ID(),
+        qsignal.Time,
+        Hash(qsignal.Signal.Type()),
+        uint64(len(ser)),
+      },
+      ser,
+    }
+  }
+
   return node_db.Serialize(), nil
 }
 
-func KeyID(pub *ecdsa.PublicKey) NodeID {
-  ser := elliptic.Marshal(pub.Curve, pub.X, pub.Y)
-  str := uuid.NewHash(sha512.New(), ZeroUUID, ser, 3)
+func KeyID(pub ed25519.PublicKey) NodeID {
+  str := uuid.NewHash(sha512.New(), ZeroUUID, pub, 3)
   return NodeID(str)
 }
 
 // Create a new node in memory and start it's event loop
 // TODO: Change panics to errors
-func NewNode(ctx *Context, key *ecdsa.PrivateKey, node_type NodeType, buffer_size uint32, queued_signals []QueuedSignal, extensions ...Extension) *Node {
+func NewNode(ctx *Context, key ed25519.PrivateKey, node_type NodeType, buffer_size uint32, queued_signals []QueuedSignal, extensions ...Extension) *Node {
   var err error
+  var public ed25519.PublicKey
   if key == nil {
-    key, err = ecdsa.GenerateKey(ctx.ECDSA, rand.Reader)
+    public, key, err = ed25519.GenerateKey(rand.Reader)
     if err != nil {
       panic(err)
     }
+  } else {
+    public = key.Public().(ed25519.PublicKey)
   }
-  id := KeyID(&key.PublicKey)
+  id := KeyID(public)
   _, exists := ctx.Node(id)
   if exists == true {
     panic("Attempted to create an existing node")
@@ -432,9 +454,7 @@ func NewNode(ctx *Context, key *ecdsa.PrivateKey, node_type NodeType, buffer_siz
   }
 
   if queued_signals == nil {
-    queued_signals = []QueuedSignal{
-      QueuedSignal{uuid.New(), &NewSignal, time.Now()},
-    }
+    queued_signals = []QueuedSignal{}
   }
 
   next_signal, timeout_chan := SoonestSignal(queued_signals)
@@ -456,6 +476,8 @@ func NewNode(ctx *Context, key *ecdsa.PrivateKey, node_type NodeType, buffer_siz
     panic(err)
   }
 
+  node.Process(ctx, node.ID, &NewSignal)
+
   go runNode(ctx, node)
 
   return node
@@ -497,7 +519,7 @@ type NodeDBHeader struct {
 
 type NodeDB struct {
   Header NodeDBHeader
-  QueuedSignals []QueuedSignal
+  QueuedSignals []QSignalDB
   Extensions []ExtensionDB
   KeyBytes []byte
 }
@@ -551,9 +573,34 @@ func NewNodeDB(data []byte) (NodeDB, error) {
     ptr += int(EXTENSION_DB_HEADER_LEN + length)
   }
 
-  queued_signals := make([]QueuedSignal, num_queued_signals)
+  queued_signals := make([]QSignalDB, num_queued_signals)
   for i, _ := range(queued_signals) {
-    queued_signals[i] = QueuedSignal{}
+    cur := data[ptr:]
+    // TODO: load a header for each with the signal type and the signal length, so that it can be deserialized and incremented
+    // Right now causes segfault because any saved signal is loaded as nil
+    signal_id_bytes := cur[0:16]
+    unix_milli := binary.BigEndian.Uint64(cur[16:24])
+    type_hash := binary.BigEndian.Uint64(cur[24:32])
+    signal_size := binary.BigEndian.Uint64(cur[32:40])
+
+    signal_id, err := uuid.FromBytes(signal_id_bytes)
+    if err != nil {
+      return zero, err
+    }
+
+    signal_data := cur[QSIGNAL_DB_HEADER_LEN:(QSIGNAL_DB_HEADER_LEN+signal_size)]
+
+    queued_signals[i] = QSignalDB{
+      QSignalDBHeader{
+        signal_id,
+        time.UnixMilli(int64(unix_milli)),
+        type_hash,
+        signal_size,
+      },
+      signal_data,
+    }
+
+    ptr += QSIGNAL_DB_HEADER_LEN + int(signal_size)
   }
 
   return NodeDB{
@@ -592,10 +639,28 @@ func (node NodeDB) Serialize() []byte {
   for _, extension := range(node.Extensions) {
     ser = append(ser, extension.Serialize()...)
   }
+  for _, qsignal := range(node.QueuedSignals) {
+    ser = append(ser, qsignal.Serialize()...)
+  }
 
   return ser
 }
 
+func (header QSignalDBHeader) Serialize() []byte {
+  ret := make([]byte, QSIGNAL_DB_HEADER_LEN)
+  id_ser, _ := header.SignalID.MarshalBinary()
+  copy(ret, id_ser)
+  binary.BigEndian.PutUint64(ret[16:24], uint64(header.Time.UnixMilli()))
+  binary.BigEndian.PutUint64(ret[24:32], header.TypeHash)
+  binary.BigEndian.PutUint64(ret[32:40], header.Length)
+  return ret
+}
+
+func (qsignal QSignalDB) Serialize() []byte {
+  header_bytes := qsignal.Header.Serialize()
+  return append(header_bytes, qsignal.Data...)
+}
+
 func (header ExtensionDBHeader) Serialize() []byte {
   ret := make([]byte, EXTENSION_DB_HEADER_LEN)
   binary.BigEndian.PutUint64(ret[0:8], header.TypeHash)
@@ -608,6 +673,18 @@ func (extension ExtensionDB) Serialize() []byte {
   return append(header_bytes, extension.Data...)
 }
 
+type QSignalDBHeader struct {
+  SignalID uuid.UUID
+  Time time.Time
+  TypeHash uint64
+  Length uint64
+}
+
+type QSignalDB struct {
+  Header QSignalDBHeader
+  Data []byte
+}
+
 type ExtensionDBHeader struct {
   TypeHash uint64
   Length uint64
@@ -663,16 +740,20 @@ func LoadNode(ctx * Context, id NodeID) (*Node, error) {
     return nil, err
   }
 
-  key, err := x509.ParseECPrivateKey(node_db.KeyBytes)
+  key_raw, err := x509.ParsePKCS8PrivateKey(node_db.KeyBytes)
   if err != nil {
     return nil, err
   }
 
-  if key.PublicKey.Curve != ctx.ECDSA {
-    return nil, fmt.Errorf("%s - wrong ec curve for private key: %+v, expected %+v", id, key.PublicKey.Curve, ctx.ECDSA)
+  var key ed25519.PrivateKey
+  switch k := key_raw.(type) {
+  case ed25519.PrivateKey:
+    key = k
+  default:
+    return nil, fmt.Errorf("Wrong type for private key loaded: %s - %s", id, reflect.TypeOf(k))
   }
 
-  key_id := KeyID(&key.PublicKey)
+  key_id := KeyID(key.Public().(ed25519.PublicKey))
   if key_id != id {
     return nil, fmt.Errorf("KeyID(%s) != %s", key_id, id)
   }
@@ -682,7 +763,22 @@ func LoadNode(ctx * Context, id NodeID) (*Node, error) {
     return nil, fmt.Errorf("Tried to load node %s of type 0x%x, which is not a known node type", id, node_db.Header.TypeHash)
   }
 
-  next_signal, timeout_chan := SoonestSignal(node_db.QueuedSignals)
+  signal_queue := make([]QueuedSignal, node_db.Header.NumQueuedSignals)
+  for i, qsignal := range(node_db.QueuedSignals) {
+    sig_info, exists := ctx.Signals[qsignal.Header.TypeHash]
+    if exists == false {
+      return nil, fmt.Errorf("0x%x is not a known signal type", qsignal.Header.TypeHash)
+    }
+
+    signal, err := sig_info.Load(ctx, qsignal.Data)
+    if err != nil {
+      return nil, err
+    }
+
+    signal_queue[i] = QueuedSignal{qsignal.Header.SignalID, signal, qsignal.Header.Time}
+  }
+
+  next_signal, timeout_chan := SoonestSignal(signal_queue)
   node := &Node{
     Key: key,
     ID: key_id,
@@ -691,7 +787,7 @@ func LoadNode(ctx * Context, id NodeID) (*Node, error) {
     MsgChan: make(chan Msg, node_db.Header.BufferSize),
     BufferSize: node_db.Header.BufferSize,
     TimeoutChan: timeout_chan,
-    SignalQueue: node_db.QueuedSignals,
+    SignalQueue: signal_queue,
     NextSignal: next_signal,
   }
   ctx.AddNode(id, node)

node_test.go

@@ -4,11 +4,11 @@ import (
   "testing"
   "time"
   "crypto/rand"
-  "crypto/ecdsa"
+  "crypto/ed25519"
 )
 
 func TestNodeDB(t *testing.T) {
-  ctx := logTestContext(t, []string{})
+  ctx := logTestContext(t, []string{"signal", "node"})
   node_type := NodeType("test")
   err := ctx.RegisterNodeType(node_type, []ExtType{GroupExtType})
   fatalErr(t, err)
@@ -26,13 +26,13 @@ func TestNodeRead(t *testing.T) {
   err := ctx.RegisterNodeType(node_type, []ExtType{ACLExtType, GroupExtType, ECDHExtType})
   fatalErr(t, err)
 
-  n1_key, err := ecdsa.GenerateKey(ctx.ECDSA, rand.Reader)
+  n1_pub, n1_key, err := ed25519.GenerateKey(rand.Reader)
   fatalErr(t, err)
-  n2_key, err := ecdsa.GenerateKey(ctx.ECDSA, rand.Reader)
+  n2_pub, n2_key, err := ed25519.GenerateKey(rand.Reader)
   fatalErr(t, err)
 
-  n1_id := KeyID(&n1_key.PublicKey)
-  n2_id := KeyID(&n2_key.PublicKey)
+  n1_id := KeyID(n1_pub)
+  n2_id := KeyID(n2_pub)
 
   ctx.Log.Logf("test", "N1: %s", n1_id)
   ctx.Log.Logf("test", "N2: %s", n2_id)

signal.go

@@ -5,8 +5,8 @@ import (
   "fmt"
   "encoding/json"
   "encoding/binary"
-  "crypto/sha512"
-  "crypto/ecdsa"
+  "crypto"
+  "crypto/ed25519"
   "crypto/ecdh"
   "crypto/rand"
   "crypto/aes"
@@ -250,7 +250,7 @@ type ReadSignal struct {
 
 type AuthorizedSignal struct {
   BaseSignal
-  Principal *ecdsa.PublicKey
+  Principal ed25519.PublicKey
   Signal Signal
   Signature []byte
 }
@@ -259,21 +259,20 @@ func (signal *AuthorizedSignal) Permission() Action {
   return AuthorizedSignalAction
 }
 
-func NewAuthorizedSignal(principal *ecdsa.PrivateKey, signal Signal) (AuthorizedSignal, error) {
+func NewAuthorizedSignal(principal ed25519.PrivateKey, signal Signal) (AuthorizedSignal, error) {
   sig_data, err := signal.Serialize()
   if err != nil {
     return AuthorizedSignal{}, err
   }
 
-  sig_hash := sha512.Sum512(sig_data)
-  sig, err := ecdsa.SignASN1(rand.Reader, principal, sig_hash[:])
+  sig, err := principal.Sign(rand.Reader, sig_data, crypto.Hash(0))
   if err != nil {
     return AuthorizedSignal{}, err
   }
 
   return AuthorizedSignal{
     BaseSignal: NewDirectSignal(AuthorizedSignalType),
-    Principal: &principal.PublicKey,
+    Principal: principal.Public().(ed25519.PublicKey),
     Signal: signal,
     Signature: sig,
   }, nil
@@ -315,7 +314,7 @@ func NewReadResultSignal(req_id uuid.UUID, node_type NodeType, exts map[ExtType]
 type ECDHSignal struct {
   StringSignal
   Time time.Time
-  ECDSA *ecdsa.PublicKey
+  EDDSA ed25519.PublicKey
   ECDH *ecdh.PublicKey
   Signature []byte
 }
@@ -323,7 +322,7 @@ type ECDHSignal struct {
 type ECDHSignalJSON struct {
   StringSignal
   Time time.Time `json:"time"`
-  ECDSA []byte `json:"ecdsa_pubkey"`
+  EDDSA []byte `json:"ecdsa_pubkey"`
   ECDH []byte `json:"ecdh_pubkey"`
   Signature []byte `json:"signature"`
 }
@@ -333,7 +332,7 @@ func (signal *ECDHSignal) MarshalJSON() ([]byte, error) {
     StringSignal: signal.StringSignal,
     Time: signal.Time,
     ECDH: signal.ECDH.Bytes(),
-    ECDSA: signal.ECDH.Bytes(),
+    EDDSA: signal.ECDH.Bytes(),
     Signature: signal.Signature,
   })
 }
@@ -342,18 +341,6 @@ func (signal *ECDHSignal) Serialize() ([]byte, error) {
   return json.Marshal(signal)
 }
 
-func keyHash(now time.Time, ec_key *ecdh.PublicKey) ([]byte, error) {
-  time_bytes, err := now.MarshalJSON()
-  if err != nil {
-    return nil, err
-  }
-
-  sig_data := append(ec_key.Bytes(), time_bytes...)
-  sig_hash := sha512.Sum512(sig_data)
-
-  return sig_hash[:], nil
-}
-
 func NewECDHReqSignal(ctx *Context, node *Node) (ECDHSignal, *ecdh.PrivateKey, error) {
   ec_key, err := ctx.ECDH.GenerateKey(rand.Reader)
   if err != nil {
@@ -361,13 +348,14 @@ func NewECDHReqSignal(ctx *Context, node *Node) (ECDHSignal, *ecdh.PrivateKey, e
   }
 
   now := time.Now()
-
-  sig_hash, err := keyHash(now, ec_key.PublicKey())
+  time_bytes, err := now.MarshalJSON()
   if err != nil {
     return ECDHSignal{}, nil, err
   }
 
-  sig, err := ecdsa.SignASN1(rand.Reader, node.Key, sig_hash)
+  sig_data := append(ec_key.PublicKey().Bytes(), time_bytes...)
+
+  sig, err := node.Key.Sign(rand.Reader, sig_data, crypto.Hash(0))
   if err != nil {
     return ECDHSignal{}, nil, err
   }
@@ -378,7 +366,7 @@ func NewECDHReqSignal(ctx *Context, node *Node) (ECDHSignal, *ecdh.PrivateKey, e
       Str: "req",
     },
     Time: now,
-    ECDSA: &node.Key.PublicKey,
+    EDDSA: node.Key.Public().(ed25519.PublicKey),
     ECDH: ec_key.PublicKey(),
     Signature: sig,
   }, ec_key, nil
@@ -404,12 +392,14 @@ func NewECDHRespSignal(ctx *Context, node *Node, req *ECDHSignal) (ECDHSignal, [
     return ECDHSignal{}, nil, err
   }
 
-  key_hash, err := keyHash(now, ec_key.PublicKey())
+  time_bytes, err := now.MarshalJSON()
   if err != nil {
     return ECDHSignal{}, nil, err
   }
 
-  sig, err := ecdsa.SignASN1(rand.Reader, node.Key, key_hash)
+  sig_data := append(ec_key.PublicKey().Bytes(), time_bytes...)
+
+  sig, err := node.Key.Sign(rand.Reader, sig_data, crypto.Hash(0))
   if err != nil {
     return ECDHSignal{}, nil, err
   }
@@ -420,7 +410,7 @@ func NewECDHRespSignal(ctx *Context, node *Node, req *ECDHSignal) (ECDHSignal, [
       Str: "resp",
     },
     Time: now,
-    ECDSA: &node.Key.PublicKey,
+    EDDSA: node.Key.Public().(ed25519.PublicKey),
     ECDH: ec_key.PublicKey(),
     Signature: sig,
   }, shared_secret, nil
@@ -436,14 +426,16 @@ func VerifyECDHSignal(now time.Time, sig *ECDHSignal, window time.Duration) erro
     return fmt.Errorf("TIME_TOO_EARLY: %+v", sig.Time)
   }
 
-  sig_hash, err := keyHash(sig.Time, sig.ECDH)
+  time_bytes, err := sig.Time.MarshalJSON()
   if err != nil {
     return err
   }
 
-  verified := ecdsa.VerifyASN1(sig.ECDSA, sig_hash, sig.Signature)
+  sig_data := append(sig.ECDH.Bytes(), time_bytes...)
+
+  verified := ed25519.Verify(sig.EDDSA, sig_data, sig.Signature)
   if verified == false {
-    return fmt.Errorf("VERIFY_FAIL")
+    return fmt.Errorf("Failed to verify signature")
   }
 
   return nil