Upload v1.0

LibMcCrypt/Crypto.cs

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+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace McCrypt
+{
+    internal class Crypto
+    {
+        internal static byte[] Sha256(byte[] data)
+        {
+            SHA256 sha256 = SHA256.Create();
+            byte[] hash = sha256.ComputeHash(data);
+            sha256.Dispose();
+            return hash;
+        }
+        internal static byte[] Aes256CfbEncrypt(byte[] key, byte[] iv, byte[] data)
+        {
+            Aes aes = Aes.Create();
+            aes.Mode = CipherMode.CFB;
+            aes.Padding = PaddingMode.None;
+            aes.BlockSize = 128;
+            aes.KeySize = 256;
+
+            ICryptoTransform aesEncryptor = aes.CreateEncryptor(key, iv);
+            using (MemoryStream msEncrypt = new MemoryStream())
+            {
+                using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, aesEncryptor, CryptoStreamMode.Write))
+                {
+                    csEncrypt.Write(data, 0, data.Length);
+
+                    long totalWritten = data.Length;
+                    while ((totalWritten % 16 != 0))
+                    {
+                        csEncrypt.WriteByte(0);
+                        totalWritten++;
+                    }
+
+                    msEncrypt.Seek(0x00, SeekOrigin.Begin);
+                    return msEncrypt.ToArray();
+                }
+            }
+        }
+
+        internal static byte[] Aes256CfbDecrypt(byte[] key, byte[] iv, byte[] data)
+        {
+            Aes aes = Aes.Create();
+            aes.Mode = CipherMode.CFB;
+            aes.Padding = PaddingMode.Zeros;
+            aes.BlockSize = 128;
+            aes.KeySize = 256;
+
+            ICryptoTransform aesDecryptor = aes.CreateDecryptor(key, iv);
+            using (MemoryStream msDecrypt = new MemoryStream())
+            {
+                msDecrypt.Write(data, 0, data.Length);
+
+                while (msDecrypt.Length % 16 != 0)
+                    msDecrypt.WriteByte(0);
+
+                msDecrypt.Seek(0x00, SeekOrigin.Begin);
+                using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, aesDecryptor, CryptoStreamMode.Read))
+                {
+                    byte[] plaintext = new byte[msDecrypt.Length];
+                    csDecrypt.Read(plaintext, 0x00, plaintext.Length);
+
+                    Array.Copy(plaintext, data, data.Length);
+                    return data;
+                }
+            }
+        }
+
+    }
+}