From c085b773b7b2671af222546f63bcc02d563d06ea Mon Sep 17 00:00:00 2001
From: Quinn Slack <sqs@cs.stanford.edu>
Date: Tue, 19 Apr 2011 16:26:59 -0700
Subject: [PATCH] docs for makeX

---
 core/srp.js | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/core/srp.js b/core/srp.js
index 814f324..6b0dd24 100644
--- a/core/srp.js
+++ b/core/srp.js
@@ -17,11 +17,16 @@ sjcl.keyexchange.srp = {
     return group.g.powermod(x, group.N);
   },
 
+  /**
+   * Calculates SRP x.
+   *   x = SHA1(<salt> | SHA(<username> | ":" | <raw password>)) [RFC 2945]
+   * @param {String} I The username.
+   * @param {String} P The password.
+   * @param {Object} s A bitArray of the salt.
+   * @return {Object} A bitArray of SRP x.
+   */
   makeX: function(I, P, s) {
-    var inner;
-    // From RFC 2945:
-    // x = SHA1(<salt> | SHA(<username> | ":" | <raw password>))
-    inner = sjcl.hash.sha1.hash(I + ':' + P);
+    var inner = sjcl.hash.sha1.hash(I + ':' + P);
     return sjcl.hash.sha1.hash(sjcl.bitArray.concat(s, inner));
   },