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node_modules/hash.js/lib/hash/utils.js

@@ -5,6 +5,16 @@ var inherits = require('inherits');
 
 exports.inherits = inherits;
 
+function isSurrogatePair(msg, i) {
+  if ((msg.charCodeAt(i) & 0xFC00) !== 0xD800) {
+    return false;
+  }
+  if (i < 0 || i + 1 >= msg.length) {
+    return false;
+  }
+  return (msg.charCodeAt(i + 1) & 0xFC00) === 0xDC00;
+}
+
 function toArray(msg, enc) {
   if (Array.isArray(msg))
     return msg.slice();
@@ -13,14 +23,29 @@ function toArray(msg, enc) {
   var res = [];
   if (typeof msg === 'string') {
     if (!enc) {
+      // Inspired by stringToUtf8ByteArray() in closure-library by Google
+      // https://github.com/google/closure-library/blob/8598d87242af59aac233270742c8984e2b2bdbe0/closure/goog/crypt/crypt.js#L117-L143
+      // Apache License 2.0
+      // https://github.com/google/closure-library/blob/master/LICENSE
+      var p = 0;
       for (var i = 0; i < msg.length; i++) {
         var c = msg.charCodeAt(i);
-        var hi = c >> 8;
-        var lo = c & 0xff;
-        if (hi)
-          res.push(hi, lo);
-        else
-          res.push(lo);
+        if (c < 128) {
+          res[p++] = c;
+        } else if (c < 2048) {
+          res[p++] = (c >> 6) | 192;
+          res[p++] = (c & 63) | 128;
+        } else if (isSurrogatePair(msg, i)) {
+          c = 0x10000 + ((c & 0x03FF) << 10) + (msg.charCodeAt(++i) & 0x03FF);
+          res[p++] = (c >> 18) | 240;
+          res[p++] = ((c >> 12) & 63) | 128;
+          res[p++] = ((c >> 6) & 63) | 128;
+          res[p++] = (c & 63) | 128;
+        } else {
+          res[p++] = (c >> 12) | 224;
+          res[p++] = ((c >> 6) & 63) | 128;
+          res[p++] = (c & 63) | 128;
+        }
       }
     } else if (enc === 'hex') {
       msg = msg.replace(/[^a-z0-9]+/ig, '');