Core/BnetServer: Bnetserver cleanup

Port From (https://github.com/TrinityCore/TrinityCore/commit/e9392ad28767626e519c463e2110184d71ba8426)
2020-08-12 17:43:37 -04:00
parent 7eb9b2201f
commit 459d49f899
12 changed files with 201 additions and 56 deletions
@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Security.Cryptography;
+using System.Numerics;
+
+namespace Framework.Cryptography
+{
+    public class SRP6
+    {
+        static SHA1 _sha1;
+        static BigInteger _g;
+        static BigInteger _N;
+
+        static SRP6()
+        {
+            _sha1 = new SHA1Managed();
+            _g = new byte[] { 7 }.ToBigInteger();
+            _N = 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);
+        }
+
+        public static (byte[] Salt, byte[] Verifier) MakeRegistrationData(string username, string password)
+        {
+            var salt = new byte[0].GenerateRandomKey(32); // random salt
+            return (salt, CalculateVerifier(username, password, salt));
+        }
+
+        [Obsolete]
+        public static (byte[] Salt, byte[] Verifier) MakeRegistrationDataFromHash(byte[] hash)
+        {
+            var salt = new byte[0].GenerateRandomKey(32); // random salt
+            return (salt, CalculateVerifierFromHash(hash, salt));
+        }
+        
+        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);
+        }
+
+        // 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();
+        }
+
+        public static bool CheckLogin(string username, string password, byte[] salt, byte[] verifier)
+        {
+            return verifier.Compare(CalculateVerifier(username, password, salt));
+        }
+    }
+}