6.6.1

dist/elliptic.js

@@ -2289,16 +2289,29 @@ EC.prototype.sign = function sign(msg, key, enc, options) {
   if (!options)
     options = {};
 
+  if (typeof msg !== 'string' && typeof msg !== 'number' && !BN.isBN(msg)) {
+    assert(typeof msg === 'object' && msg && typeof msg.length === 'number',
+      'Expected message to be an array-like, a hex string, or a BN instance');
+    assert((msg.length >>> 0) === msg.length); // non-negative 32-bit integer
+    for (var i = 0; i < msg.length; i++) assert((msg[i] & 255) === msg[i]);
+  }
+
   key = this.keyFromPrivate(key, enc);
   msg = this._truncateToN(msg, false, options.msgBitLength);
 
+  // Would fail further checks, but let's make the error message clear
+  assert(!msg.isNeg(), 'Can not sign a negative message');
+
   // Zero-extend key to provide enough entropy
   var bytes = this.n.byteLength();
   var bkey = key.getPrivate().toArray('be', bytes);
 
   // Zero-extend nonce to have the same byte size as N
   var nonce = msg.toArray('be', bytes);
 
+  // Recheck nonce to be bijective to msg
+  assert((new BN(nonce)).eq(msg), 'Can not sign message');
+
   // Instantiate Hmac_DRBG
   var drbg = new HmacDRBG({
     hash: this.hash,
@@ -8889,7 +8902,7 @@ utils.encode = function encode(arr, enc) {
 },{}],35:[function(require,module,exports){
 module.exports={
   "name": "elliptic",
-  "version": "6.6.0",
+  "version": "6.6.1",
   "description": "EC cryptography",
   "main": "lib/elliptic.js",
   "files": [

package.json

@@ -1,6 +1,6 @@
 {
   "name": "elliptic",
-  "version": "6.6.0",
+  "version": "6.6.1",
   "description": "EC cryptography",
   "main": "lib/elliptic.js",
   "files": [