1 files changed, 24 insertions, 3 deletions
diff --git a/src/srp_calculate.js b/src/srp_calculate.js
index a1cbe51..e32def8 100644
--- a/src/srp_calculate.js
+++ b/src/srp_calculate.js
@@ -50,14 +50,13 @@ srp.Calculate = function() {
   };
 
   this.hashHex = function(hexString) {
-    return this.hash(hex2a(hexString));
+    return SHA256(hex2a(hexString));
   };
 
   this.hash = function(string) {
-    return SHA256(string);
+    return SHA256(utf8Encode(string));
   };
 
-
   this.isInvalidEphemeral = function(a) {
     return (g.modPow(a, N) == 0);
   };
@@ -117,4 +116,26 @@ srp.Calculate = function() {
     }
     return str;
   }
+  
+  function utf8Encode(string) {
+    string = string.replace(/\r\n/g,"\n");
+    var utftext = "";
+
+    for (var n = 0; n < string.length; n++) {
+      var c = string.charCodeAt(n);
+      if (c < 128) {
+        utftext += String.fromCharCode(c);
+      }
+      else if((c > 127) && (c < 2048)) {
+        utftext += String.fromCharCode((c >> 6) | 192);
+        utftext += String.fromCharCode((c & 63) | 128);
+      }
+      else {
+        utftext += String.fromCharCode((c >> 12) | 224);
+        utftext += String.fromCharCode(((c >> 6) & 63) | 128);
+        utftext += String.fromCharCode((c & 63) | 128);
+      }
+    }
+    return utftext;
+  }
 };