From c00ac1ff51c795d4d93c32e0a913e2cebf917d0c Mon Sep 17 00:00:00 2001
From: Biswakalyan Bhuyan <biswa@surgot.in>
Date: Thu, 25 Jul 2024 12:09:28 +0530
Subject: added backend and login portal

---
 .../buffer-equal-constant-time/index.js            | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 backend/node_modules/buffer-equal-constant-time/index.js

(limited to 'backend/node_modules/buffer-equal-constant-time/index.js')

diff --git a/backend/node_modules/buffer-equal-constant-time/index.js b/backend/node_modules/buffer-equal-constant-time/index.js
new file mode 100644
index 0000000..5462c1f
--- /dev/null
+++ b/backend/node_modules/buffer-equal-constant-time/index.js
@@ -0,0 +1,41 @@
+/*jshint node:true */
+'use strict';
+var Buffer = require('buffer').Buffer; // browserify
+var SlowBuffer = require('buffer').SlowBuffer;
+
+module.exports = bufferEq;
+
+function bufferEq(a, b) {
+
+  // shortcutting on type is necessary for correctness
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    return false;
+  }
+
+  // buffer sizes should be well-known information, so despite this
+  // shortcutting, it doesn't leak any information about the *contents* of the
+  // buffers.
+  if (a.length !== b.length) {
+    return false;
+  }
+
+  var c = 0;
+  for (var i = 0; i < a.length; i++) {
+    /*jshint bitwise:false */
+    c |= a[i] ^ b[i]; // XOR
+  }
+  return c === 0;
+}
+
+bufferEq.install = function() {
+  Buffer.prototype.equal = SlowBuffer.prototype.equal = function equal(that) {
+    return bufferEq(this, that);
+  };
+};
+
+var origBufEqual = Buffer.prototype.equal;
+var origSlowBufEqual = SlowBuffer.prototype.equal;
+bufferEq.restore = function() {
+  Buffer.prototype.equal = origBufEqual;
+  SlowBuffer.prototype.equal = origSlowBufEqual;
+};
-- 
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