From a3cb913c51a28cb12e450b5a06a8a2a9995989aa Mon Sep 17 00:00:00 2001
From: Ulf Gebhardt <ulf.gebhardt@webcraft-media.de>
Date: Fri, 18 Dec 2020 15:04:12 +0100
Subject: [PATCH] v0.1.0

---
 .gitignore   |  3 ++-
 index.ts     | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 package.json |  5 +++++
 yarn.lock    | 10 ++++++++++
 4 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 index.ts

diff --git a/.gitignore b/.gitignore
index 04c01ba..6c7cbbe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules/
-dist/
\ No newline at end of file
+dist/
+/yarn-error.log
diff --git a/index.ts b/index.ts
new file mode 100644
index 0000000..f7a8f18
--- /dev/null
+++ b/index.ts
@@ -0,0 +1,53 @@
+import { randomBytes, createHash } from 'crypto'
+import bigInt from 'big-integer'
+
+export const hex2bin = (s: String) => {
+  const ret = []
+  for (let i = 0, l = s.length; i < l; i += 2) {
+    const c = parseInt(s.substr(i, 1), 16)
+    const k = parseInt(s.substr(i + 1, 1), 16)
+    if (isNaN(c) || isNaN(k)) return false
+    ret.push((c << 4) | k)
+  }
+  return String.fromCharCode.apply(String, ret)
+}
+
+export const bin2hex = (s: String) => {
+  let result = ''
+  for (let i = 0, l = s.length; i < l; i++) {
+    const n = s.charCodeAt(i).toString(16)
+    result += n.length < 2 ? '0' + n : n
+  }
+  return result
+}
+
+export const reverseHex = (string: String) => {
+  const bytes = []
+  for (let i = 0, length = string.length; i < length; i += 2) {
+    bytes.push(string.substr(i, 2))
+  }
+  return bytes.reverse().join('')
+}
+
+export const register = (
+  username: String,
+  password: String,
+  gHex = '07',
+  NHex = '894B645E89E1535BBDAD5B8B290650530801B18EBFBF5E8FAB3C82872A3E9BB7'
+) => {
+  const g = bigInt(gHex, 16)
+  const N = bigInt(NHex, 16)
+  const saltDB = bin2hex(randomBytes(32).toString('binary'))
+  const salt = hex2bin(reverseHex(saltDB))
+  const identity = createHash('sha1')
+    .update((username + ':' + password).toUpperCase())
+    .digest('latin1')
+  const sha = reverseHex(
+    createHash('sha1')
+      .update(salt + identity, 'latin1')
+      .digest('hex')
+  )
+  const privateKey = bigInt(sha, 16)
+  const verifier = g.modPow(privateKey, N).toString(16)
+  return { salt: saltDB, verifier }
+}
diff --git a/package.json b/package.json
index c045656..38c82a6 100644
--- a/package.json
+++ b/package.json
@@ -4,10 +4,15 @@
   "description": "SRP implementation for WoW Server authentication in Typescript",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
+  "prepublish": "tsc",
   "repository": "git@github.com:Mojotrollz/js-wowemu-auth.git",
   "author": "Ulf Gebhardt <ulf.gebhardt@webcraft-media.de>",
   "license": "GPL-2.0-only",
+  "dependencies": {
+    "big-integer": "^1.6.48"
+  },
   "devDependencies": {
+    "@types/node": "14.14.11",
     "typescript": "^4.1.3"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 3986214..00703d6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,16 @@
 # yarn lockfile v1
 
 
+"@types/node@14.14.11":
+  version "14.14.11"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.11.tgz#fc25a4248a5e8d0837019b1d170146d07334abe0"
+  integrity sha512-BJ97wAUuU3NUiUCp44xzUFquQEvnk1wu7q4CMEUYKJWjdkr0YWYDsm4RFtAvxYsNjLsKcrFt6RvK8r+mnzMbEQ==
+
+big-integer@^1.6.48:
+  version "1.6.48"
+  resolved "https://registry.yarnpkg.com/big-integer/-/big-integer-1.6.48.tgz#8fd88bd1632cba4a1c8c3e3d7159f08bb95b4b9e"
+  integrity sha512-j51egjPa7/i+RdiRuJbPdJ2FIUYYPhvYLjzoYbcMMm62ooO6F94fETG4MTs46zPAF9Brs04OajboA/qTGuz78w==
+
 typescript@^4.1.3:
   version "4.1.3"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.3.tgz#519d582bd94cba0cf8934c7d8e8467e473f53bb7"