Core/Accounts: Should fix random error about verifier length.

Source/Framework/Cryptography/SRP6.cs

@@ -1,8 +1,24 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Security.Cryptography;
+/*
+ * Copyright (C) 2012-2020 CypherCore <http://github.com/CypherCore>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using System;
 using System.Numerics;
+using System.Security.Cryptography;
+using System.Text;
 
 namespace Framework.Cryptography
 {
@@ -15,12 +31,12 @@ namespace Framework.Cryptography
         static SRP6()
         {
             _sha1 = new SHA1Managed();
-            _g = new byte[] { 7 }.ToBigInteger();
-            _N = new byte[]
+            _g = new BigInteger(7);
+            _N = new BigInteger(new byte[]
             {
                 0x89, 0x4B, 0x64, 0x5E, 0x89, 0xE1, 0x53, 0x5B, 0xBD, 0xAD, 0x5B, 0x8B, 0x29, 0x06, 0x50, 0x53,
                 0x08, 0x01, 0xB1, 0x8E, 0xBF, 0xBF, 0x5E, 0x8F, 0xAB, 0x3C, 0x82, 0x87, 0x2A, 0x3E, 0x9B, 0xB7,
-            }.ToBigInteger(true);
+            }, true, true);
         }
 
         public static (byte[] Salt, byte[] Verifier) MakeRegistrationData(string username, string password)
@@ -39,14 +55,14 @@ namespace Framework.Cryptography
         public static byte[] CalculateVerifier(string username, string password, byte[] salt)
         {
             // v = g ^ H(s || H(u || ':' || p)) mod N
-            return CalculateVerifierFromHash(_sha1.ComputeHash(Encoding.ASCII.GetBytes(username.ToUpper() + ":" + password.ToUpper())), salt);
+            return CalculateVerifierFromHash(_sha1.ComputeHash(Encoding.UTF8.GetBytes(username.ToUpperInvariant() + ":" + password.ToUpperInvariant())), salt);
         }
 
         // merge this into CalculateVerifier once the sha_pass hack finally gets nuked from orbit
         public static byte[] CalculateVerifierFromHash(byte[] hash, byte[] salt)
         {
             //            v = BigInteger.ModPow(gBN, x, BN);
-            return BigInteger.ModPow(_g, _sha1.ComputeHash(salt.Combine(hash)).ToBigInteger(), _N).ToByteArray();
+            return BigInteger.ModPow(_g, new BigInteger(_sha1.ComputeHash(salt.Combine(hash)), true), _N).ToByteArray();
         }
 
         public static bool CheckLogin(string username, string password, byte[] salt, byte[] verifier)

Source/Framework/Util/Extensions.cs

@@ -128,30 +128,6 @@ namespace System
             return combined;
         }
 
-        public static BigInteger ToBigInteger<T>(this T value, bool isBigEndian = false)
-        {
-            BigInteger ret;
-
-            switch (typeof(T).Name)
-            {
-                case "Byte[]":
-                    var data = value as byte[];
-
-                    if (isBigEndian)
-                        Array.Reverse(data);
-
-                    ret = new BigInteger(data.Combine(new byte[] { 0 }));
-                    break;
-                case "BigInteger":
-                    ret = (BigInteger)Convert.ChangeType(value, typeof(BigInteger));
-                    break;
-                default:
-                    throw new NotSupportedException($"'{typeof(T).Name}' conversion to 'BigInteger' not supported.");
-            }
-
-            return ret;
-        }
-
         public static void Swap<T>(ref T left, ref T right)
         {
             T temp = left;

Source/Game/Accounts/AccountManager.cs

@@ -37,13 +37,13 @@ namespace Game
         public AccountOpResult CreateAccount(string username, string password, string email = "", uint bnetAccountId = 0, byte bnetIndex = 0)
         {
             if (username.Length > MaxAccountLength)
-                return AccountOpResult.NameTooLong;                           // username's too long
+                return AccountOpResult.NameTooLong;
 
             if (password.Length > MaxAccountLength)
-                return AccountOpResult.PassTooLong;                           // password's too long
+                return AccountOpResult.PassTooLong;
 
             if (GetId(username) != 0)
-                return AccountOpResult.NameAlreadyExist;                       // username does already exist
+                return AccountOpResult.NameAlreadyExist;
 
             (byte[] salt, byte[] verifier) = SRP6.MakeRegistrationData(username, password);
 
@@ -68,7 +68,7 @@ namespace Game
             stmt = DB.Login.GetPreparedStatement(LoginStatements.INS_REALM_CHARACTERS_INIT);
             DB.Login.Execute(stmt);
 
-            return AccountOpResult.Ok;                                          // everything's fine
+            return AccountOpResult.Ok;
         }
 
         public AccountOpResult DeleteAccount(uint accountId)