SRP6 testing

Account.cs

@@ -1,6 +1,12 @@
 using System;
+using System.Linq;
+using System.Numerics;
+using System.Text;
 using System.Collections.Generic;
+using System.Security.Cryptography;
 using MySql.Data.MySqlClient;
+using System.Globalization;
+using MiscUtil.Conversion;
 
 namespace NightmareCoreWeb2
 {
@@ -11,6 +17,7 @@ namespace NightmareCoreWeb2
         public string Username { get; set; }
         public string Email { get; set; }
         public string LastIP { get; set; }
+        public string Verifier {get; set;}
         public DateTime LastLogin { get; set; }
         public List<Character> Characters { get; set; }
         public List<AccountAccess> Access { get; set; }
@@ -46,7 +53,7 @@ namespace NightmareCoreWeb2
             MySqlConnection conn = new MySqlConnection(Program.connStr);
             conn.Open();
 
-            string sql = "select id,username,email,last_ip,last_login from account where username=@username";
+            string sql = "select id,username,email,last_ip,last_login,verifier from account where username=@username";
             MySqlCommand cmd = new MySqlCommand(sql, conn);
             cmd.Parameters.AddWithValue("username", username);
             MySqlDataReader rdr = cmd.ExecuteReader();
@@ -60,6 +67,7 @@ namespace NightmareCoreWeb2
                     this.Email = rdr.GetString(2);
                     this.LastIP = rdr.GetString(3);
                     this.LastLogin = rdr.GetDateTime(4);
+                    this.Verifier = rdr.GetString(5);
                 }
                 catch (Exception e)
                 {
@@ -116,10 +124,75 @@ namespace NightmareCoreWeb2
             conn.Close();
         }
 
+        public bool AuthenticateAccount(string password)
+        {
+            MySqlConnection conn = new MySqlConnection(Program.connStr);
+            conn.Open();
+            string sql = "select salt,verifier from account where username=@username";
+            MySqlCommand cmd = new MySqlCommand(sql, conn);
+            cmd.Parameters.AddWithValue("username", this.Username);
+            MySqlDataReader rdr = cmd.ExecuteReader();
+            string salt = "", verifier = "";
+            while (rdr.Read())
+            {
+                try
+                {
+                    salt = rdr.GetString(0);
+                    verifier = rdr.GetString(1);
+                }
+                catch (Exception) { }
+            }
+
+            return VerifySRP6Login(this.Username, password, Encoding.ASCII.GetBytes(salt), Encoding.ASCII.GetBytes(verifier));
+        }
+        // https://gist.github.com/Rochet2/3bb0adaf6f3e9a9fbc78ba5ce9a43e09
+        public static byte[] CalculateSRP6Verifier(string username, string password, byte[] salt_bytes)
+        {
+            // algorithm constants
+            BigInteger g = 7;
+            BigInteger N = BigInteger.Parse("894B645E89E1535BBDAD5B8B290650530801B18EBFBF5E8FAB3C82872A3E9BB7", NumberStyles.HexNumber);
+
+            SHA1 sha1 = SHA1.Create();
+
+            // calculate first hash
+            byte[] login_bytes = Encoding.ASCII.GetBytes((username + ':' + password).ToUpper());
+            byte[] h1_bytes = sha1.ComputeHash(login_bytes);
+
+            // calculate second hash
+            byte[] h2_bytes = sha1.ComputeHash(salt_bytes.Concat(h1_bytes).ToArray());
+
+            // convert to integer (little-endian)
+            BigInteger h2 = new BigInteger(h2_bytes.Reverse().ToArray());
+            Console.WriteLine(h2);
+            
+            // g^h2 mod N
+            BigInteger verifier = BigInteger.ModPow(g, h2, N);
+
+            // convert back to a byte array (little-endian)
+            byte[] verifier_bytes = verifier.ToByteArray().Reverse().ToArray();
+
+            // pad to 32 bytes, remember that zeros go on the end in little-endian!
+            byte[] verifier_bytes_padded = new byte[Math.Max(32, verifier_bytes.Length)];
+            Buffer.BlockCopy(verifier_bytes, 0, verifier_bytes_padded, 0, verifier_bytes.Length);
+            
+            // done!
+            return verifier_bytes_padded;
+        }
+        public static bool VerifySRP6Login(string username, string password, byte[] salt, byte[] verifier)
+        {
+            // re-calculate the verifier using the provided username + password and the stored salt
+            byte[] checkVerifier = CalculateSRP6Verifier(username, password, salt);
+            Console.WriteLine($"{Encoding.ASCII.GetString(verifier)}\n{Encoding.ASCII.GetString(checkVerifier)}");
+            // compare it against the stored verifier
+            return verifier.SequenceEqual(checkVerifier);
+        }
+        
     }
+
     public class AccountAccess
     {
         public int SecurityLevel { get; set; }
         public int RealmID { get; set; }
     }
+
 }

Pages/Account.cshtml

@@ -6,17 +6,32 @@
     @if (string.IsNullOrEmpty(Model.AuthToken))
     {
         <div id="LoginForm">
-            <form action="?handler=Login" method="post" enctype="multipart/form-data">
+
-                <div class="form-group">
+            <div class="card">
-                    <label for="UserEmail">E-mail:</label>
+                <div class="card-header">
-                    <input asp-for="UserEmail" type="text" id="UserEmail" />
+                    <h6>Login</h6>
                 </div>
-                <div class="form-group">
+                <div class="card-body">
-                    <label for="UserPassword">Password:</label>
+                    <form action="?handler=Login" method="post" enctype="multipart/form-data">
-                    <input asp-for="UserPassword" type="password" id="UserPassword">
+                        <div class="form-group">
+                            <label for="UserEmail">E-mail:</label>
+                            <input asp-for="UserEmail" type="text" id="UserEmail" />
+                        </div>
+                        <div class="form-group">
+                            <label for="UserPassword">Password:</label>
+                            <input asp-for="UserPassword" type="password" id="UserPassword">
+                        </div>
+                        <input type="submit">
+                        @Html.AntiForgeryToken()
+                    </form>
+
                 </div>
-            </form>
+            </div>
         </div>
+        <br/>
+
+
+
     }
     else
     {
@@ -55,10 +70,14 @@
                                         <p class="card-text">@ticket.Description</p>
                                         <br>
 
-                                    <a class="btn active" href="/Account?handler=CharacterAction&guid=@ticket.Id&action=1">Rename Character</a>
+                                        <a class="btn active" href="/Account?handler=CharacterAction&guid=@ticket.Id&action=1">Rename
-                                    <a class="btn active" href="/Account?handler=CharacterAction&guid=@ticket.Id&action=8">Recustomize Character</a> 
+                                            Character</a>
-                                    <a class="btn active" href="/Account?handler=CharacterAction&guid=@ticket.Id&action=64">Change Faction</a> 
+                                        <a class="btn active"
-                                    <a class="btn active" href="/Account?handler=CharacterAction&guid=@ticket.Id&action=128">Change Race</a>
+                            href="/Account?handler=CharacterAction&guid=@ticket.Id&action=8">Recustomize Character</a>
+                                        <a class="btn active" href="/Account?handler=CharacterAction&guid=@ticket.Id&action=64">Change
+                                            Faction</a>
+                                        <a class="btn active" href="/Account?handler=CharacterAction&guid=@ticket.Id&action=128">Change
+                                            Race</a>
                                     </div>
                                     <div class="card-footer text-muted">
                                         <p>Opened @ticket.CreateTime.ToLocalTime()</p>
@@ -79,10 +98,15 @@
                                     <h6>@character.Name</h6>
                                 </div>
                                 <div class="card-body">
-                                    <a class="btn active" href="/Account?handler=CharacterAction&guid=@character.guid&action=1">Rename Character</a>
+                                    <a class="btn active"
-                                    <a class="btn active" href="/Account?handler=CharacterAction&guid=@character.guid&action=8">Recustomize Character</a> 
+                            href="/Account?handler=CharacterAction&guid=@character.guid&action=1">Rename Character</a>
-                                    <a class="btn active" href="/Account?handler=CharacterAction&guid=@character.guid&action=64">Change Faction</a> 
+                                    <a class="btn active"
-                                    <a class="btn active" href="/Account?handler=CharacterAction&guid=@character.guid&action=128">Change Race</a>
+                            href="/Account?handler=CharacterAction&guid=@character.guid&action=8">Recustomize
+                                        Character</a>
+                                    <a class="btn active"
+                            href="/Account?handler=CharacterAction&guid=@character.guid&action=64">Change Faction</a>
+                                    <a class="btn active"
+                            href="/Account?handler=CharacterAction&guid=@character.guid&action=128">Change Race</a>
                                 </div>
                                 <div class="card-footer text-muted">
                                     <p>Level @character.Level @character.GetRace() @character.GetClass()</p>

Pages/Account.cshtml.cs

@@ -11,7 +11,7 @@ namespace NightmareCoreWeb2.Pages
 {
     public class AccountModel : PageModel
     {
-                public string UserEmail { get; set; }
+        public string UserEmail { get; set; }
         public string UserPassword { get; set; }
         public string CharacterListType { get; set; }
         public string AuthToken { get; set; }
@@ -88,13 +88,17 @@ namespace NightmareCoreWeb2.Pages
 
         public void OnPostLogin()
         {
+            Console.WriteLine("Logging in!");
             UserEmail = Request.Form["UserEmail"];
             UserPassword = Request.Form["UserPassword"];
             Username = UserEmail.Substring(0, UserEmail.IndexOf("@"));
-            AuthToken = Hash($"{Username.ToUpper()}:{UserPassword.ToUpper()}");
+            Account a = new Account(Username);
+            if (a.AuthenticateAccount(UserPassword))
+            {
+                Response.Cookies.Append("Username", Username);
+                Response.Cookies.Append("AuthToken", a.Verifier);
+            }
 
-            Response.Cookies.Append("Username", Username);
-            Response.Cookies.Append("AuthToken", AuthToken);
         }
 
         static string Hash(string input)