up

2020-07-09 08:50:24 +08:00
parent 13d25f4707
commit c523462b82
1818 changed files with 174940 additions and 582 deletions
--- a/Assets/BestHTTP/SecureProtocol/crypto/generators/DHKeyGeneratorHelper.cs
+++ b/Assets/BestHTTP/SecureProtocol/crypto/generators/DHKeyGeneratorHelper.cs
@@ -0,0 +1,76 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+
+using System;
+
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Math.EC.Multiplier;
+using Org.BouncyCastle.Security;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Generators
+{
+    class DHKeyGeneratorHelper
+    {
+        internal static readonly DHKeyGeneratorHelper Instance = new DHKeyGeneratorHelper();
+
+        private DHKeyGeneratorHelper()
+        {
+        }
+
+        internal BigInteger CalculatePrivate(
+            DHParameters	dhParams,
+            SecureRandom	random)
+        {
+            int limit = dhParams.L;
+
+            if (limit != 0)
+            {
+                int minWeight = limit >> 2;
+                for (;;)
+                {
+                    BigInteger x = new BigInteger(limit, random).SetBit(limit - 1);
+                    if (WNafUtilities.GetNafWeight(x) >= minWeight)
+                    {
+                        return x;
+                    }
+                }
+            }
+
+            BigInteger min = BigInteger.Two;
+            int m = dhParams.M;
+            if (m != 0)
+            {
+                min = BigInteger.One.ShiftLeft(m - 1);
+            }
+
+            BigInteger q = dhParams.Q;
+            if (q == null)
+            {
+                q = dhParams.P;
+            }
+            BigInteger max = q.Subtract(BigInteger.Two);
+
+            {
+                int minWeight = max.BitLength >> 2;
+                for (;;)
+                {
+                    BigInteger x = BigIntegers.CreateRandomInRange(min, max, random);
+                    if (WNafUtilities.GetNafWeight(x) >= minWeight)
+                    {
+                        return x;
+                    }
+                }
+            }
+        }
+
+        internal BigInteger CalculatePublic(
+            DHParameters	dhParams,
+            BigInteger		x)
+        {
+            return dhParams.G.ModPow(x, dhParams.P);
+        }
+    }
+}
+
+#endif