From 85cfc7d81bc902f35460804bb59de2870217c511 Mon Sep 17 00:00:00 2001
From: Zarmack Tanen <zarmack@gmail.com>
Date: Thu, 10 Sep 2015 11:49:44 +0200
Subject: [PATCH] Optimizing code

---
 lib/srp.js | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/lib/srp.js b/lib/srp.js
index 1c4b6b7..a77de86 100644
--- a/lib/srp.js
+++ b/lib/srp.js
@@ -231,8 +231,7 @@ function getu(params, A, B) {
   var u_buf = crypto.createHash(params.hash)
     .update(A).update(B)
     .digest();
-//!  return bignum.fromBuffer(u_buf);
-    return(new BigInteger(u_buf));
+  return(new BigInteger(u_buf));
 };
 
 /*
@@ -255,8 +254,6 @@ function client_getS(params, k_num, x_num, a_num, B_num, u_num) {
   assertIsBigInteger(a_num);
   assertIsBigInteger(B_num);
   assertIsBigInteger(u_num);
-//  var g = params.g;
-//  var N = params.N;
   if((zero.compareTo(B_num) > 0) && (N.compareTo(B_num) < 0))
     throw new Error("invalid server-supplied 'B', must be 1..N-1");
   var S_num = B_num.subtract(k_num.multiply(params.g.modPow(x_num, params.N))).modPow(a_num.add(u_num.multiply(x_num)), params.N).mod(params.N);
@@ -281,12 +278,10 @@ function server_getS(params, v_num, A_num, b_num, u_num) {
   assertIsBigInteger(A_num);
   assertIsBigInteger(b_num);
   assertIsBigInteger(u_num);
-  var N = params.N;
 //!  if (zero.greater(A_num) || N.lesser(A_num))
   if((zero.compareTo(A_num) > 0) && (N.compareTo(A_num) < 0))
     throw new Error("invalid client-supplied 'A', must be 1..N-1");
-//*  var S_num = A_num.mul(v_num.powm(u_num, N)).powm(b_num, N).mod(N);
-  var S_num = A_num.multiply(v_num.modPow(u_num, N)).modPow(b_num, N).mod(N);
+  var S_num = A_num.multiply(v_num.modPow(u_num, params.N)).modPow(b_num, params.N).mod(params.N);
   return padToN(S_num, params);
 };