Merge pull request #1 from studentmain/net-core-build

Net core build

appveyor.yml

@@ -41,6 +41,12 @@ image: Visual Studio 2019
 clone_depth: 5                      # clone entire repository history if not defined
 
 
+test_script:
+  ps: dotnet test
+
+#on_finish:
+#  ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
+
 # environment variables
 environment:
   # my_var1: value1

shadowsocks-csharp/Controller/Service/PACServer.cs

@@ -51,7 +51,8 @@ namespace Shadowsocks.Controller
 
         private static string GetHash(string content)
         {
-            return   HttpServerUtilityUrlToken.Encode(MbedTLS.MD5(Encoding.ASCII.GetBytes(content)));
+            
+            return HttpServerUtilityUrlToken.Encode(CryptoUtils.MD5(Encoding.ASCII.GetBytes(content)));
         }
 
         public override bool Handle(byte[] firstPacket, int length, Socket socket, object state)

shadowsocks-csharp/Encryption/AEAD/AEADBouncyCastleEncryptor.cs

@@ -0,0 +1,77 @@
+using Org.BouncyCastle.Crypto.Engines;
+using Org.BouncyCastle.Crypto.Modes;
+using Org.BouncyCastle.Crypto.Parameters;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Shadowsocks.Encryption.AEAD
+{
+    public class AEADBouncyCastleEncryptor : AEADEncryptor, IDisposable
+    {
+        static int CIPHER_AES = 1;  // dummy
+
+        public AEADBouncyCastleEncryptor(string method, string password)
+    : base(method, password)
+        {
+        }
+
+
+        private static readonly Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo>
+        {
+            {"aes-128-gcm", new EncryptorInfo("AES-128-GCM", 16, 16, 12, 16, CIPHER_AES)},
+            {"aes-192-gcm", new EncryptorInfo("AES-192-GCM", 24, 24, 12, 16, CIPHER_AES)},
+            {"aes-256-gcm", new EncryptorInfo("AES-256-GCM", 32, 32, 12, 16, CIPHER_AES)},
+        };
+
+        protected override Dictionary<string, EncryptorInfo> getCiphers()
+        {
+            return _ciphers;
+        }
+
+        public override void InitCipher(byte[] salt, bool isEncrypt, bool isUdp)
+        {
+            base.InitCipher(salt, isEncrypt, isUdp);
+
+            DeriveSessionKey(isEncrypt ? _encryptSalt : _decryptSalt,
+                 _Masterkey, _sessionKey);
+        }
+
+        public override void cipherDecrypt(byte[] ciphertext, uint clen, byte[] plaintext, ref uint plen)
+        {
+            var cipher = new GcmBlockCipher(new AesEngine());
+            AeadParameters parameters = new AeadParameters(new KeyParameter(_sessionKey), tagLen * 8, _decNonce);
+
+            cipher.Init(false, parameters);
+            var plaintextBC = new byte[cipher.GetOutputSize((int)clen)];
+            var len = cipher.ProcessBytes(ciphertext, 0, (int)clen, plaintextBC, 0);
+            cipher.DoFinal(plaintextBC, len);
+            plen = (uint)(plaintextBC.Length);
+            Array.Copy(plaintextBC, 0, plaintext, 0, plen);
+        }
+
+        public override void cipherEncrypt(byte[] plaintext, uint plen, byte[] ciphertext, ref uint clen)
+        {
+            var cipher = new GcmBlockCipher(new AesEngine());
+            AeadParameters parameters = new AeadParameters(new KeyParameter(_sessionKey), tagLen * 8, _encNonce);
+
+            cipher.Init(true, parameters);
+            var ciphertextBC = new byte[cipher.GetOutputSize((int)plen)];
+            var len = cipher.ProcessBytes(plaintext, 0, (int)plen, ciphertextBC, 0);
+            cipher.DoFinal(ciphertextBC, len);
+            clen = (uint)(ciphertextBC.Length);
+            Array.Copy(ciphertextBC, 0, ciphertext, 0, clen);
+        }
+
+        public static List<string> SupportedCiphers()
+        {
+            return new List<string>(_ciphers.Keys);
+        }
+
+        public override void Dispose()
+        {
+        }
+    }
+}

shadowsocks-csharp/Encryption/AEAD/AEADEncryptor.cs

@@ -103,15 +103,13 @@ namespace Shadowsocks.Encryption.AEAD
 
         public void DeriveSessionKey(byte[] salt, byte[] masterKey, byte[] sessionKey)
         {
-            int ret = MbedTLS.hkdf(salt, saltLen, masterKey, keyLen, InfoBytes, InfoBytes.Length, sessionKey,
-                keyLen);
-            if (ret != 0) throw new System.Exception("failed to generate session key");
+            CryptoUtils.HKDF(keyLen, masterKey, salt, InfoBytes).CopyTo(sessionKey,0);
         }
 
         protected void IncrementNonce(bool isEncrypt)
         {
             lock (_nonceIncrementLock) {
-                Sodium.sodium_increment(isEncrypt ? _encNonce : _decNonce, nonceLen);
+                CryptoUtils.SodiumIncrement(isEncrypt ? _encNonce : _decNonce);
             }
         }
 

shadowsocks-csharp/Encryption/AEAD/AEADMbedTLSEncryptor.cs

@@ -1,178 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-using Shadowsocks.Encryption.Exception;
-
-namespace Shadowsocks.Encryption.AEAD
-{
-    public class AEADMbedTLSEncryptor
-        : AEADEncryptor, IDisposable
-    {
-        const int CIPHER_AES = 1;
-
-        private IntPtr _encryptCtx = IntPtr.Zero;
-        private IntPtr _decryptCtx = IntPtr.Zero;
-
-        public AEADMbedTLSEncryptor(string method, string password)
-            : base(method, password)
-        {
-        }
-
-        private static readonly Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo>
-        {
-            {"aes-128-gcm", new EncryptorInfo("AES-128-GCM", 16, 16, 12, 16, CIPHER_AES)},
-            {"aes-192-gcm", new EncryptorInfo("AES-192-GCM", 24, 24, 12, 16, CIPHER_AES)},
-            {"aes-256-gcm", new EncryptorInfo("AES-256-GCM", 32, 32, 12, 16, CIPHER_AES)},
-        };
-
-        public static List<string> SupportedCiphers()
-        {
-            return new List<string>(_ciphers.Keys);
-        }
-
-        protected override Dictionary<string, EncryptorInfo> getCiphers()
-        {
-            return _ciphers;
-        }
-
-        public override void InitCipher(byte[] salt, bool isEncrypt, bool isUdp)
-        {
-            base.InitCipher(salt, isEncrypt, isUdp);
-            IntPtr ctx = Marshal.AllocHGlobal(MbedTLS.cipher_get_size_ex());
-            if (isEncrypt)
-            {
-                _encryptCtx = ctx;
-            }
-            else
-            {
-                _decryptCtx = ctx;
-            }
-
-            MbedTLS.cipher_init(ctx);
-            if (MbedTLS.cipher_setup(ctx, MbedTLS.cipher_info_from_string(_innerLibName)) != 0)
-                throw new System.Exception("Cannot initialize mbed TLS cipher context");
-
-            DeriveSessionKey(isEncrypt ? _encryptSalt : _decryptSalt,
-                _Masterkey, _sessionKey);
-            CipherSetKey(isEncrypt, _sessionKey);
-        }
-
-        private void CipherSetKey(bool isEncrypt, byte[] key)
-        {
-            IntPtr ctx = isEncrypt ? _encryptCtx : _decryptCtx;
-            int ret = MbedTLS.cipher_setkey(ctx, key, keyLen * 8,
-                isEncrypt ? MbedTLS.MBEDTLS_ENCRYPT : MbedTLS.MBEDTLS_DECRYPT);
-            if (ret != 0) throw new System.Exception("failed to set key");
-            ret = MbedTLS.cipher_reset(ctx);
-            if (ret != 0) throw new System.Exception("failed to finish preparation");
-        }
-
-        public override void cipherEncrypt(byte[] plaintext, uint plen, byte[] ciphertext, ref uint clen)
-        {
-            // buf: all plaintext
-            // outbuf: ciphertext + tag
-            int ret;
-            byte[] tagbuf = new byte[tagLen];
-            uint olen = 0;
-            switch (_cipher)
-            {
-                case CIPHER_AES:
-                    ret = MbedTLS.cipher_auth_encrypt(_encryptCtx,
-                        /* nonce */
-                        _encNonce, (uint) nonceLen,
-                        /* AD */
-                        IntPtr.Zero, 0,
-                        /* plain */
-                        plaintext, plen,
-                        /* cipher */
-                        ciphertext, ref olen,
-                        tagbuf, (uint) tagLen);
-                    if (ret != 0) throw new CryptoErrorException(String.Format("ret is {0}", ret));
-                    Debug.Assert(olen == plen);
-                    // attach tag to ciphertext
-                    Array.Copy(tagbuf, 0, ciphertext, (int) plen, tagLen);
-                    clen = olen + (uint) tagLen;
-                    break;
-                default:
-                    throw new System.Exception("not implemented");
-            }
-        }
-
-        public override void cipherDecrypt(byte[] ciphertext, uint clen, byte[] plaintext, ref uint plen)
-        {
-            // buf: ciphertext + tag
-            // outbuf: plaintext
-            int ret;
-            uint olen = 0;
-            // split tag
-            byte[] tagbuf = new byte[tagLen];
-            Array.Copy(ciphertext, (int) (clen - tagLen), tagbuf, 0, tagLen);
-            switch (_cipher)
-            {
-                case CIPHER_AES:
-                    ret = MbedTLS.cipher_auth_decrypt(_decryptCtx,
-                        _decNonce, (uint) nonceLen,
-                        IntPtr.Zero, 0,
-                        ciphertext, (uint) (clen - tagLen),
-                        plaintext, ref olen,
-                        tagbuf, (uint) tagLen);
-                    if (ret != 0) throw new CryptoErrorException(String.Format("ret is {0}", ret));
-                    Debug.Assert(olen == clen - tagLen);
-                    plen = olen;
-                    break;
-                default:
-                    throw new System.Exception("not implemented");
-            }
-        }
-
-        #region IDisposable
-
-        private bool _disposed;
-
-        // instance based lock
-        private readonly object _lock = new object();
-
-        public override void Dispose()
-        {
-            Dispose(true);
-            GC.SuppressFinalize(this);
-        }
-
-        ~AEADMbedTLSEncryptor()
-        {
-            Dispose(false);
-        }
-
-        protected virtual void Dispose(bool disposing)
-        {
-            lock (_lock)
-            {
-                if (_disposed) return;
-                _disposed = true;
-            }
-
-            if (disposing)
-            {
-                // free managed objects
-            }
-
-            // free unmanaged objects
-            if (_encryptCtx != IntPtr.Zero)
-            {
-                MbedTLS.cipher_free(_encryptCtx);
-                Marshal.FreeHGlobal(_encryptCtx);
-                _encryptCtx = IntPtr.Zero;
-            }
-
-            if (_decryptCtx != IntPtr.Zero)
-            {
-                MbedTLS.cipher_free(_decryptCtx);
-                Marshal.FreeHGlobal(_decryptCtx);
-                _decryptCtx = IntPtr.Zero;
-            }
-        }
-
-        #endregion
-    }
-}

shadowsocks-csharp/Encryption/AEAD/AEADNativeEncryptor.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+
+namespace Shadowsocks.Encryption.AEAD
+{
+    public class AEADNativeEncryptor : AEADEncryptor
+    {
+        public AEADNativeEncryptor(string method, string password)
+            : base(method, password)
+        {
+        }
+
+        public override void cipherDecrypt(byte[] ciphertext, uint clen, byte[] plaintext, ref uint plen)
+        {
+            Array.Copy(ciphertext, plaintext, 0);
+            plen = clen;
+
+        }
+
+        public override void cipherEncrypt(byte[] plaintext, uint plen, byte[] ciphertext, ref uint clen)
+        {
+            Array.Copy(plaintext, ciphertext, 0);
+            clen = plen;
+        }
+
+        public override void Dispose()
+        {
+            return;
+        }
+
+        private static Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo>()
+        {
+            {"plain-fake-aead",new EncryptorInfo("PLAIN_AEAD",0,0,0,0,0) }
+        };
+
+
+        protected override Dictionary<string, EncryptorInfo> getCiphers()
+        {
+            return _ciphers;
+        }
+
+        public static IEnumerable<string> SupportedCiphers()
+        {
+            return _ciphers.Keys;
+        }
+
+    }
+}

shadowsocks-csharp/Encryption/AEAD/AEADOpenSSLEncryptor.cs

@@ -1,192 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Shadowsocks.Encryption.Exception;
-
-namespace Shadowsocks.Encryption.AEAD
-{
-    public class AEADOpenSSLEncryptor
-        : AEADEncryptor, IDisposable
-    {
-        const int CIPHER_AES = 1;
-        const int CIPHER_CHACHA20IETFPOLY1305 = 2;
-
-        private byte[] _opensslEncSubkey;
-        private byte[] _opensslDecSubkey;
-
-        private IntPtr _encryptCtx = IntPtr.Zero;
-        private IntPtr _decryptCtx = IntPtr.Zero;
-
-        private IntPtr _cipherInfoPtr = IntPtr.Zero;
-
-        public AEADOpenSSLEncryptor(string method, string password)
-            : base(method, password)
-        {
-            _opensslEncSubkey = new byte[keyLen];
-            _opensslDecSubkey = new byte[keyLen];
-        }
-
-        private static readonly Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo>
-        {
-            {"aes-128-gcm", new EncryptorInfo("aes-128-gcm", 16, 16, 12, 16, CIPHER_AES)},
-            {"aes-192-gcm", new EncryptorInfo("aes-192-gcm", 24, 24, 12, 16, CIPHER_AES)},
-            {"aes-256-gcm", new EncryptorInfo("aes-256-gcm", 32, 32, 12, 16, CIPHER_AES)},
-            {"chacha20-ietf-poly1305", new EncryptorInfo("chacha20-poly1305", 32, 32, 12, 16, CIPHER_CHACHA20IETFPOLY1305)}
-        };
-
-        public static List<string> SupportedCiphers()
-        {
-            return new List<string>(_ciphers.Keys);
-        }
-
-        protected override Dictionary<string, EncryptorInfo> getCiphers()
-        {
-            return _ciphers;
-        }
-
-        public override void InitCipher(byte[] salt, bool isEncrypt, bool isUdp)
-        {
-            base.InitCipher(salt, isEncrypt, isUdp);
-            _cipherInfoPtr = OpenSSL.GetCipherInfo(_innerLibName);
-            if (_cipherInfoPtr == IntPtr.Zero) throw new System.Exception("openssl: cipher not found");
-            IntPtr ctx = OpenSSL.EVP_CIPHER_CTX_new();
-            if (ctx == IntPtr.Zero) throw new System.Exception("openssl: fail to create ctx");
-
-            if (isEncrypt)
-            {
-                _encryptCtx = ctx;
-            }
-            else
-            {
-                _decryptCtx = ctx;
-            }
-
-            DeriveSessionKey(isEncrypt ? _encryptSalt : _decryptSalt, _Masterkey,
-                isEncrypt ? _opensslEncSubkey : _opensslDecSubkey);
-
-            var ret = OpenSSL.EVP_CipherInit_ex(ctx, _cipherInfoPtr, IntPtr.Zero, null, null,
-                isEncrypt ? OpenSSL.OPENSSL_ENCRYPT : OpenSSL.OPENSSL_DECRYPT);
-            if (ret != 1) throw new System.Exception("openssl: fail to init ctx");
-
-            ret = OpenSSL.EVP_CIPHER_CTX_set_key_length(ctx, keyLen);
-            if (ret != 1) throw new System.Exception("openssl: fail to set key length");
-
-            ret = OpenSSL.EVP_CIPHER_CTX_ctrl(ctx, OpenSSL.EVP_CTRL_AEAD_SET_IVLEN,
-                nonceLen, IntPtr.Zero);
-            if (ret != 1) throw new System.Exception("openssl: fail to set AEAD nonce length");
-
-            ret = OpenSSL.EVP_CipherInit_ex(ctx, IntPtr.Zero, IntPtr.Zero,
-                isEncrypt ? _opensslEncSubkey : _opensslDecSubkey,
-                null,
-                isEncrypt ? OpenSSL.OPENSSL_ENCRYPT : OpenSSL.OPENSSL_DECRYPT);
-            if (ret != 1) throw new System.Exception("openssl: cannot set key");
-            OpenSSL.EVP_CIPHER_CTX_set_padding(ctx, 0);
-        }
-
-        public override void cipherEncrypt(byte[] plaintext, uint plen, byte[] ciphertext, ref uint clen)
-        {
-            OpenSSL.SetCtxNonce(_encryptCtx, _encNonce, true);
-            // buf: all plaintext
-            // outbuf: ciphertext + tag
-            int ret;
-            int tmpLen = 0;
-            clen = 0;
-            var tagBuf = new byte[tagLen];
-
-            ret = OpenSSL.EVP_CipherUpdate(_encryptCtx, ciphertext, out tmpLen,
-                plaintext, (int) plen);
-            if (ret != 1) throw new CryptoErrorException("openssl: fail to encrypt AEAD");
-            clen += (uint) tmpLen;
-            // For AEAD cipher, it should not output anything
-            ret = OpenSSL.EVP_CipherFinal_ex(_encryptCtx, ciphertext, ref tmpLen);
-            if (ret != 1) throw new CryptoErrorException("openssl: fail to finalize AEAD");
-            if (tmpLen > 0)
-            {
-                throw new System.Exception("openssl: fail to finish AEAD");
-            }
-
-            OpenSSL.AEADGetTag(_encryptCtx, tagBuf, tagLen);
-            Array.Copy(tagBuf, 0, ciphertext, clen, tagLen);
-            clen += (uint) tagLen;
-        }
-
-        public override void cipherDecrypt(byte[] ciphertext, uint clen, byte[] plaintext, ref uint plen)
-        {
-            OpenSSL.SetCtxNonce(_decryptCtx, _decNonce, false);
-            // buf: ciphertext + tag
-            // outbuf: plaintext
-            int ret;
-            int tmpLen = 0;
-            plen = 0;
-
-            // split tag
-            byte[] tagbuf = new byte[tagLen];
-            Array.Copy(ciphertext, (int) (clen - tagLen), tagbuf, 0, tagLen);
-            OpenSSL.AEADSetTag(_decryptCtx, tagbuf, tagLen);
-
-            ret = OpenSSL.EVP_CipherUpdate(_decryptCtx,
-                plaintext, out tmpLen, ciphertext, (int) (clen - tagLen));
-            if (ret != 1) throw new CryptoErrorException("openssl: fail to decrypt AEAD");
-            plen += (uint) tmpLen;
-
-            // For AEAD cipher, it should not output anything
-            ret = OpenSSL.EVP_CipherFinal_ex(_decryptCtx, plaintext, ref tmpLen);
-            if (ret <= 0)
-            {
-                // If this is not successful authenticated
-                throw new CryptoErrorException(String.Format("ret is {0}", ret));
-            }
-
-            if (tmpLen > 0)
-            {
-                throw new System.Exception("openssl: fail to finish AEAD");
-            }
-        }
-
-        #region IDisposable
-
-        private bool _disposed;
-
-        // instance based lock
-        private readonly object _lock = new object();
-
-        public override void Dispose()
-        {
-            Dispose(true);
-            GC.SuppressFinalize(this);
-        }
-
-        ~AEADOpenSSLEncryptor()
-        {
-            Dispose(false);
-        }
-
-        protected virtual void Dispose(bool disposing)
-        {
-            lock (_lock)
-            {
-                if (_disposed) return;
-                _disposed = true;
-            }
-
-            if (disposing)
-            {
-                // free managed objects
-            }
-
-            // free unmanaged objects
-            if (_encryptCtx != IntPtr.Zero)
-            {
-                OpenSSL.EVP_CIPHER_CTX_free(_encryptCtx);
-                _encryptCtx = IntPtr.Zero;
-            }
-
-            if (_decryptCtx != IntPtr.Zero)
-            {
-                OpenSSL.EVP_CIPHER_CTX_free(_decryptCtx);
-                _decryptCtx = IntPtr.Zero;
-            }
-        }
-
-        #endregion
-    }
-}

shadowsocks-csharp/Encryption/AEAD/AEADSodiumEncryptor.cs

@@ -1,141 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using NLog;
-using Shadowsocks.Controller;
-using Shadowsocks.Encryption.Exception;
-
-namespace Shadowsocks.Encryption.AEAD
-{
-    public class AEADSodiumEncryptor
-        : AEADEncryptor, IDisposable
-    {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
-        private const int CIPHER_CHACHA20IETFPOLY1305 = 1;
-        private const int CIPHER_XCHACHA20IETFPOLY1305 = 2;
-        private const int CIPHER_AES256GCM = 3;
-
-        private byte[] _sodiumEncSubkey;
-        private byte[] _sodiumDecSubkey;
-
-        public AEADSodiumEncryptor(string method, string password)
-            : base(method, password)
-        {
-            _sodiumEncSubkey = new byte[keyLen];
-            _sodiumDecSubkey = new byte[keyLen];
-        }
-
-        private static readonly Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo>
-        {
-            {"chacha20-ietf-poly1305", new EncryptorInfo(32, 32, 12, 16, CIPHER_CHACHA20IETFPOLY1305)},
-            {"xchacha20-ietf-poly1305", new EncryptorInfo(32, 32, 24, 16, CIPHER_XCHACHA20IETFPOLY1305)},
-            {"aes-256-gcm", new EncryptorInfo(32, 32, 12, 16, CIPHER_AES256GCM)},
-        };
-
-        public static List<string> SupportedCiphers()
-        {
-            return new List<string>(_ciphers.Keys);
-        }
-
-        protected override Dictionary<string, EncryptorInfo> getCiphers()
-        {
-            return _ciphers;
-        }
-
-        public override void InitCipher(byte[] salt, bool isEncrypt, bool isUdp)
-        {
-            base.InitCipher(salt, isEncrypt, isUdp);
-            DeriveSessionKey(isEncrypt ? _encryptSalt : _decryptSalt, _Masterkey,
-                isEncrypt ? _sodiumEncSubkey : _sodiumDecSubkey);
-        }
-
-
-        public override void cipherEncrypt(byte[] plaintext, uint plen, byte[] ciphertext, ref uint clen)
-        {
-            Debug.Assert(_sodiumEncSubkey != null);
-            // buf: all plaintext
-            // outbuf: ciphertext + tag
-            int ret;
-            ulong encClen = 0;
-            logger.Dump("_encNonce before enc", _encNonce, nonceLen);
-            logger.Dump("_sodiumEncSubkey", _sodiumEncSubkey, keyLen);
-            logger.Dump("before cipherEncrypt: plain", plaintext, (int) plen);
-            switch (_cipher)
-            {
-                case CIPHER_CHACHA20IETFPOLY1305:
-                    ret = Sodium.crypto_aead_chacha20poly1305_ietf_encrypt(ciphertext, ref encClen,
-                        plaintext, (ulong) plen,
-                        null, 0,
-                        null, _encNonce,
-                        _sodiumEncSubkey);
-                    break;
-                case CIPHER_XCHACHA20IETFPOLY1305:
-                    ret = Sodium.crypto_aead_xchacha20poly1305_ietf_encrypt(ciphertext, ref encClen,
-                        plaintext, (ulong)plen,
-                        null, 0,
-                        null, _encNonce,
-                        _sodiumEncSubkey);
-                    break;
-                case CIPHER_AES256GCM:
-                    ret = Sodium.crypto_aead_aes256gcm_encrypt(ciphertext, ref encClen,
-                        plaintext, (ulong)plen,
-                        null, 0,
-                        null, _encNonce,
-                        _sodiumEncSubkey);
-                    break;
-                default:
-                    throw new System.Exception("not implemented");
-            }
-            if (ret != 0) throw new CryptoErrorException(String.Format("ret is {0}", ret));
-            logger.Dump("after cipherEncrypt: cipher", ciphertext, (int) encClen);
-            clen = (uint) encClen;
-        }
-
-        public override void cipherDecrypt(byte[] ciphertext, uint clen, byte[] plaintext, ref uint plen)
-        {
-            Debug.Assert(_sodiumDecSubkey != null);
-            // buf: ciphertext + tag
-            // outbuf: plaintext
-            int ret;
-            ulong decPlen = 0;
-            logger.Dump("_decNonce before dec", _decNonce, nonceLen);
-            logger.Dump("_sodiumDecSubkey", _sodiumDecSubkey, keyLen);
-            logger.Dump("before cipherDecrypt: cipher", ciphertext, (int) clen);
-            switch (_cipher)
-            {
-                case CIPHER_CHACHA20IETFPOLY1305:
-                    ret = Sodium.crypto_aead_chacha20poly1305_ietf_decrypt(plaintext, ref decPlen,
-                        null,
-                        ciphertext, (ulong) clen,
-                        null, 0,
-                        _decNonce, _sodiumDecSubkey);
-                    break;
-                case CIPHER_XCHACHA20IETFPOLY1305:
-                    ret = Sodium.crypto_aead_xchacha20poly1305_ietf_decrypt(plaintext, ref decPlen,
-                        null,
-                        ciphertext, (ulong)clen,
-                        null, 0,
-                        _decNonce, _sodiumDecSubkey);
-                    break;
-                case CIPHER_AES256GCM:
-                    ret = Sodium.crypto_aead_aes256gcm_decrypt(plaintext, ref decPlen,
-                        null,
-                        ciphertext, (ulong)clen,
-                        null, 0,
-                        _decNonce, _sodiumDecSubkey);
-                    break;
-                default:
-                    throw new System.Exception("not implemented");
-            }
-
-            if (ret != 0) throw new CryptoErrorException(String.Format("ret is {0}", ret));
-            logger.Dump("after cipherDecrypt: plain", plaintext, (int) decPlen);
-            plen = (uint) decPlen;
-        }
-
-        public override void Dispose()
-        {
-        }
-    }
-}

shadowsocks-csharp/Encryption/CryptoUtils.cs

@@ -0,0 +1,42 @@
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Crypto.Digests;
+using Org.BouncyCastle.Crypto.Generators;
+using Org.BouncyCastle.Crypto.Parameters;
+
+namespace Shadowsocks.Encryption
+{
+    public static class CryptoUtils
+    {
+        public static byte[] MD5(byte[] b)
+        {
+            MD5Digest md5 = new MD5Digest();
+            md5.BlockUpdate(b, 0, b.Length);
+            byte[] r = new byte[16];
+            md5.DoFinal(r, 0);
+            return r;
+        }
+
+        public static byte[] HKDF(int keylen, byte[] master, byte[] salt, byte[] info)
+        {
+            byte[] ret = new byte[keylen];
+            IDigest degist = new Sha1Digest();
+            HkdfParameters parameters = new HkdfParameters(master, salt, info);
+            HkdfBytesGenerator hkdf = new HkdfBytesGenerator(degist);
+            hkdf.Init(parameters);
+            hkdf.GenerateBytes(ret, 0, keylen);
+            return ret;
+        }
+
+        public static void SodiumIncrement(byte[] salt)
+        {
+            bool o = true; // overflow flag
+            for (int i = 0; i < salt.Length; i++)
+            {
+                if (!o) continue;
+
+                salt[i]++;
+                o = salt[i] == 0;
+            }
+        }
+    }
+}

shadowsocks-csharp/Encryption/EncryptorFactory.cs

@@ -11,59 +11,28 @@ namespace Shadowsocks.Encryption
     {
         private static Dictionary<string, Type> _registeredEncryptors = new Dictionary<string, Type>();
 
-        private static readonly Type[] ConstructorTypes = {typeof(string), typeof(string)};
+        private static readonly Type[] ConstructorTypes = { typeof(string), typeof(string) };
 
         static EncryptorFactory()
         {
-            var AEADMbedTLSEncryptorSupportedCiphers = AEADMbedTLSEncryptor.SupportedCiphers();
-            var AEADSodiumEncryptorSupportedCiphers = AEADSodiumEncryptor.SupportedCiphers();
-            if (Sodium.AES256GCMAvailable)
-            {
-                // prefer to aes-256-gcm in libsodium
-                AEADMbedTLSEncryptorSupportedCiphers.Remove("aes-256-gcm");
-            }
-            else
-            {
-                AEADSodiumEncryptorSupportedCiphers.Remove("aes-256-gcm");
-            }
-
-            // XXX: sequence matters, OpenSSL > Sodium > MbedTLS
-            foreach (string method in StreamOpenSSLEncryptor.SupportedCiphers())
+            foreach (string method in StreamNativeEncryptor.SupportedCiphers())
             {
                 if (!_registeredEncryptors.ContainsKey(method))
-                    _registeredEncryptors.Add(method, typeof(StreamOpenSSLEncryptor));
+                    _registeredEncryptors.Add(method, typeof(StreamNativeEncryptor));
             }
 
-            foreach (string method in StreamSodiumEncryptor.SupportedCiphers())
+            foreach (string method in AEADNativeEncryptor.SupportedCiphers())
             {
                 if (!_registeredEncryptors.ContainsKey(method))
-                    _registeredEncryptors.Add(method, typeof(StreamSodiumEncryptor));
+                    _registeredEncryptors.Add(method, typeof(AEADNativeEncryptor));
             }
 
-            foreach (string method in StreamMbedTLSEncryptor.SupportedCiphers())
+            foreach (string method in AEADBouncyCastleEncryptor.SupportedCiphers())
             {
                 if (!_registeredEncryptors.ContainsKey(method))
-                    _registeredEncryptors.Add(method, typeof(StreamMbedTLSEncryptor));
+                    _registeredEncryptors.Add(method, typeof(AEADBouncyCastleEncryptor));
             }
 
-
-            foreach (string method in AEADOpenSSLEncryptor.SupportedCiphers())
-            {
-                if (!_registeredEncryptors.ContainsKey(method))
-                    _registeredEncryptors.Add(method, typeof(AEADOpenSSLEncryptor));
-            }
-
-            foreach (string method in AEADSodiumEncryptorSupportedCiphers)
-            {
-                if (!_registeredEncryptors.ContainsKey(method))
-                    _registeredEncryptors.Add(method, typeof(AEADSodiumEncryptor));
-            }
-
-            foreach (string method in AEADMbedTLSEncryptorSupportedCiphers)
-            {
-                if (!_registeredEncryptors.ContainsKey(method))
-                    _registeredEncryptors.Add(method, typeof(AEADMbedTLSEncryptor));
-            }
         }
 
         public static IEncryptor GetEncryptor(string method, string password)
@@ -78,7 +47,7 @@ namespace Shadowsocks.Encryption
 
             ConstructorInfo c = t.GetConstructor(ConstructorTypes);
             if (c == null) throw new System.Exception("Invalid ctor");
-            IEncryptor result = (IEncryptor) c.Invoke(new object[] {method, password});
+            IEncryptor result = (IEncryptor)c.Invoke(new object[] { method, password });
             return result;
         }
 

shadowsocks-csharp/Encryption/MbedTLS.cs

@@ -1,109 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-using NLog;
-using Shadowsocks.Controller;
-using Shadowsocks.Properties;
-using Shadowsocks.Util;
-
-namespace Shadowsocks.Encryption
-{
-    public static class MbedTLS
-    {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
-        private const string DLLNAME = "libsscrypto.dll";
-
-        public const int MBEDTLS_ENCRYPT = 1;
-        public const int MBEDTLS_DECRYPT = 0;
-
-        static MbedTLS()
-        {
-            string dllPath = Utils.GetTempPath(DLLNAME);
-            try
-            {
-                FileManager.UncompressFile(dllPath, Resources.libsscrypto_dll);
-            }
-            catch (IOException)
-            {
-            }
-            catch (System.Exception e)
-            {
-                logger.LogUsefulException(e);
-            }
-            LoadLibrary(dllPath);
-        }
-
-        public static byte[] MD5(byte[] input)
-        {
-            byte[] output = new byte[16];
-            if (md5_ret(input, (uint) input.Length, output) != 0)
-                throw new System.Exception("mbedtls: MD5 failure");
-            return output;
-        }
-
-        [DllImport("Kernel32.dll")]
-        private static extern IntPtr LoadLibrary(string path);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int md5_ret(byte[] input, uint ilen, byte[] output);
-
-        /// <summary>
-        /// Get cipher ctx size for unmanaged memory allocation
-        /// </summary>
-        /// <returns></returns>
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int cipher_get_size_ex();
-
-        #region Cipher layer wrappers
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern IntPtr cipher_info_from_string(string cipher_name);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern void cipher_init(IntPtr ctx);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int cipher_setup(IntPtr ctx, IntPtr cipher_info);
-
-        // XXX: Check operation before using it
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int cipher_setkey(IntPtr ctx, byte[] key, int key_bitlen, int operation);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int cipher_set_iv(IntPtr ctx, byte[] iv, int iv_len);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int cipher_reset(IntPtr ctx);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int cipher_update(IntPtr ctx, byte[] input, int ilen, byte[] output, ref int olen);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern void cipher_free(IntPtr ctx);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int cipher_auth_encrypt(IntPtr ctx,
-            byte[] iv, uint iv_len,
-            IntPtr ad, uint ad_len,
-            byte[] input, uint ilen,
-            byte[] output, ref uint olen,
-            byte[] tag, uint tag_len);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int cipher_auth_decrypt(IntPtr ctx,
-            byte[] iv, uint iv_len,
-            IntPtr ad, uint ad_len,
-            byte[] input, uint ilen,
-            byte[] output, ref uint olen,
-            byte[] tag, uint tag_len);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int hkdf(byte[] salt,
-            int salt_len, byte[] ikm, int ikm_len,
-            byte[] info, int info_len, byte[] okm,
-            int okm_len);
-
-        #endregion
-    }
-}

shadowsocks-csharp/Encryption/OpenSSL.cs

@@ -1,164 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-using System.Security;
-using System.Text;
-using NLog;
-using Shadowsocks.Controller;
-using Shadowsocks.Encryption.Exception;
-using Shadowsocks.Properties;
-using Shadowsocks.Util;
-
-namespace Shadowsocks.Encryption
-{
-    // XXX: only for OpenSSL 1.1.0 and higher
-    public static class OpenSSL
-    {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
-        private const string DLLNAME = "libsscrypto.dll";
-
-        public const int OPENSSL_ENCRYPT = 1;
-        public const int OPENSSL_DECRYPT = 0;
-
-        public const int EVP_CTRL_AEAD_SET_IVLEN = 0x9;
-        public const int EVP_CTRL_AEAD_GET_TAG = 0x10;
-        public const int EVP_CTRL_AEAD_SET_TAG = 0x11;
-
-        static OpenSSL()
-        {
-            string dllPath = Utils.GetTempPath(DLLNAME);
-            try
-            {
-                FileManager.UncompressFile(dllPath, Resources.libsscrypto_dll);
-            }
-            catch (IOException)
-            {
-            }
-            catch (System.Exception e)
-            {
-                logger.LogUsefulException(e);
-            }
-            LoadLibrary(dllPath);
-        }
-
-        public static IntPtr GetCipherInfo(string cipherName)
-        {
-            var name = Encoding.ASCII.GetBytes(cipherName);
-            Array.Resize(ref name, name.Length + 1);
-            return EVP_get_cipherbyname(name);
-        }
-
-        /// <summary>
-        /// Need init cipher context after EVP_CipherFinal_ex to reuse context
-        /// </summary>
-        /// <param name="ctx"></param>
-        /// <param name="cipherType"></param>
-        /// <param name="nonce"></param>
-        public static void SetCtxNonce(IntPtr ctx, byte[] nonce, bool isEncrypt)
-        {
-            var ret = EVP_CipherInit_ex(ctx, IntPtr.Zero,
-                IntPtr.Zero, null,
-                nonce,
-                isEncrypt ? OPENSSL_ENCRYPT : OPENSSL_DECRYPT);
-            if (ret != 1) throw new System.Exception("openssl: fail to set AEAD nonce");
-        }
-
-        public static void AEADGetTag(IntPtr ctx, byte[] tagbuf, int taglen)
-        {
-            IntPtr tagBufIntPtr = IntPtr.Zero;
-            try
-            {
-                tagBufIntPtr = Marshal.AllocHGlobal(taglen);
-                var ret = EVP_CIPHER_CTX_ctrl(ctx,
-                    EVP_CTRL_AEAD_GET_TAG, taglen, tagBufIntPtr);
-                if (ret != 1) throw new CryptoErrorException("openssl: fail to get AEAD tag");
-                // take tag from unmanaged memory
-                Marshal.Copy(tagBufIntPtr, tagbuf, 0, taglen);
-            }
-            finally
-            {
-                if (tagBufIntPtr != IntPtr.Zero)
-                {
-                    Marshal.FreeHGlobal(tagBufIntPtr);
-                }
-            }
-        }
-
-        public static void AEADSetTag(IntPtr ctx, byte[] tagbuf, int taglen)
-        {
-            IntPtr tagBufIntPtr = IntPtr.Zero;
-            try
-            {
-                // allocate unmanaged memory for tag
-                tagBufIntPtr = Marshal.AllocHGlobal(taglen);
-
-                // copy tag to unmanaged memory
-                Marshal.Copy(tagbuf, 0, tagBufIntPtr, taglen);
-
-                var ret = EVP_CIPHER_CTX_ctrl(ctx,
-                    EVP_CTRL_AEAD_SET_TAG, taglen, tagBufIntPtr);
-
-                if (ret != 1) throw new CryptoErrorException("openssl: fail to set AEAD tag");
-
-            }
-            finally
-            {
-                if (tagBufIntPtr != IntPtr.Zero)
-                {
-                    Marshal.FreeHGlobal(tagBufIntPtr);
-                }
-            }
-        }
-
-        [DllImport("Kernel32.dll")]
-        private static extern IntPtr LoadLibrary(string path);
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern IntPtr EVP_CIPHER_CTX_new();
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern void EVP_CIPHER_CTX_free(IntPtr ctx);
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int EVP_CIPHER_CTX_reset(IntPtr ctx);
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int EVP_CipherInit_ex(IntPtr ctx, IntPtr type,
-            IntPtr impl, byte[] key, byte[] iv, int enc);
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int EVP_CipherUpdate(IntPtr ctx, byte[] outb,
-            out int outl, byte[] inb, int inl);
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int EVP_CipherFinal_ex(IntPtr ctx, byte[] outm, ref int outl);
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int EVP_CIPHER_CTX_set_padding(IntPtr x, int padding);
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int EVP_CIPHER_CTX_set_key_length(IntPtr x, int keylen);
-
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int EVP_CIPHER_CTX_ctrl(IntPtr ctx, int type, int arg, IntPtr ptr);
-
-        /// <summary>
-        /// simulate NUL-terminated string
-        /// </summary>
-        /// <param name="name"></param>
-        /// <returns></returns>
-        [SuppressUnmanagedCodeSecurity]
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern IntPtr EVP_get_cipherbyname(byte[] name);
-    }
-}

shadowsocks-csharp/Encryption/Sodium.cs

@@ -1,113 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-using NLog;
-using Shadowsocks.Controller;
-using Shadowsocks.Properties;
-using Shadowsocks.Util;
-
-namespace Shadowsocks.Encryption
-{
-    public static class Sodium
-    {
-        private static Logger logger = LogManager.GetCurrentClassLogger();
-
-        private const string DLLNAME = "libsscrypto.dll";
-
-        private static bool _initialized = false;
-        private static readonly object _initLock = new object();
-
-        public static bool AES256GCMAvailable { get; private set; } = false;
-
-        static Sodium()
-        {
-            string dllPath = Utils.GetTempPath(DLLNAME);
-            try
-            {
-                FileManager.UncompressFile(dllPath, Resources.libsscrypto_dll);
-            }
-            catch (IOException)
-            {
-            }
-            catch (System.Exception e)
-            {
-                logger.LogUsefulException(e);
-            }
-            LoadLibrary(dllPath);
-
-            lock (_initLock)
-            {
-                if (!_initialized)
-                {
-                    if (sodium_init() == -1)
-                    {
-                        throw new System.Exception("Failed to initialize sodium");
-                    }
-                    else /* 1 means already initialized; 0 means success */
-                    {
-                        _initialized = true;
-                    }
-
-                    AES256GCMAvailable = crypto_aead_aes256gcm_is_available() == 1;
-                    logger.Debug($"sodium: AES256GCMAvailable is {AES256GCMAvailable}");
-                }
-            }
-        }
-
-        [DllImport("Kernel32.dll")]
-        private static extern IntPtr LoadLibrary(string path);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        private static extern int sodium_init();
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        private static extern int crypto_aead_aes256gcm_is_available();
-
-        #region AEAD
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int sodium_increment(byte[] n, int nlen);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_aead_chacha20poly1305_ietf_encrypt(byte[] c, ref ulong clen_p, byte[] m,
-            ulong mlen, byte[] ad, ulong adlen, byte[] nsec, byte[] npub, byte[] k);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_aead_chacha20poly1305_ietf_decrypt(byte[] m, ref ulong mlen_p,
-            byte[] nsec, byte[] c, ulong clen, byte[] ad, ulong adlen, byte[] npub, byte[] k);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_aead_xchacha20poly1305_ietf_encrypt(byte[] c, ref ulong clen_p, byte[] m, ulong mlen,
-            byte[] ad, ulong adlen, byte[] nsec, byte[] npub, byte[] k);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_aead_xchacha20poly1305_ietf_decrypt(byte[] m, ref ulong mlen_p, byte[] nsec, byte[] c,
-            ulong clen, byte[] ad, ulong adlen, byte[] npub, byte[] k);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_aead_aes256gcm_encrypt(byte[] c, ref ulong clen_p, byte[] m, ulong mlen,
-            byte[] ad, ulong adlen, byte[] nsec, byte[] npub, byte[] k);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_aead_aes256gcm_decrypt(byte[] m, ref ulong mlen_p, byte[] nsec, byte[] c,
-            ulong clen, byte[] ad, ulong adlen, byte[] npub, byte[] k);
-
-        #endregion
-
-        #region Stream
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_stream_salsa20_xor_ic(byte[] c, byte[] m, ulong mlen, byte[] n, ulong ic,
-            byte[] k);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_stream_chacha20_xor_ic(byte[] c, byte[] m, ulong mlen, byte[] n, ulong ic,
-            byte[] k);
-
-        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
-        public static extern int crypto_stream_chacha20_ietf_xor_ic(byte[] c, byte[] m, ulong mlen, byte[] n, uint ic,
-            byte[] k);
-
-        #endregion
-    }
-}

shadowsocks-csharp/Encryption/Stream/StreamEncryptor.cs

@@ -75,11 +75,11 @@ namespace Shadowsocks.Encryption.Stream
             byte[] md5sum = null;
             while (i < keylen) {
                 if (i == 0) {
-                    md5sum = MbedTLS.MD5(password);
+                    md5sum = CryptoUtils.MD5(password);
                 } else {
                     Array.Copy(md5sum, 0, result, 0, MD5_LEN);
                     Array.Copy(password, 0, result, MD5_LEN, password.Length);
-                    md5sum = MbedTLS.MD5(result);
+                    md5sum = CryptoUtils.MD5(result);
                 }
                 Array.Copy(md5sum, 0, key, i, Math.Min(MD5_LEN, keylen - i));
                 i += MD5_LEN;

shadowsocks-csharp/Encryption/Stream/StreamMbedTLSEncryptor.cs

@@ -1,155 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Runtime.InteropServices;
-using Shadowsocks.Encryption.Exception;
-
-namespace Shadowsocks.Encryption.Stream
-{
-    public class StreamMbedTLSEncryptor
-        : StreamEncryptor, IDisposable
-    {
-        const int CIPHER_RC4 = 1;
-        const int CIPHER_AES = 2;
-        const int CIPHER_BLOWFISH = 3;
-        const int CIPHER_CAMELLIA = 4;
-
-        private IntPtr _encryptCtx = IntPtr.Zero;
-        private IntPtr _decryptCtx = IntPtr.Zero;
-
-        public StreamMbedTLSEncryptor(string method, string password)
-            : base(method, password)
-        {
-        }
-
-        private static Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo> {
-            { "aes-128-cfb", new EncryptorInfo("AES-128-CFB128", 16, 16, CIPHER_AES) },
-            { "aes-192-cfb", new EncryptorInfo("AES-192-CFB128", 24, 16, CIPHER_AES) },
-            { "aes-256-cfb", new EncryptorInfo("AES-256-CFB128", 32, 16, CIPHER_AES) },
-            { "aes-128-ctr", new EncryptorInfo("AES-128-CTR", 16, 16, CIPHER_AES) },
-            { "aes-192-ctr", new EncryptorInfo("AES-192-CTR", 24, 16, CIPHER_AES) },
-            { "aes-256-ctr", new EncryptorInfo("AES-256-CTR", 32, 16, CIPHER_AES) },
-            { "bf-cfb", new EncryptorInfo("BLOWFISH-CFB64", 16, 8, CIPHER_BLOWFISH) },
-            { "camellia-128-cfb", new EncryptorInfo("CAMELLIA-128-CFB128", 16, 16, CIPHER_CAMELLIA) },
-            { "camellia-192-cfb", new EncryptorInfo("CAMELLIA-192-CFB128", 24, 16, CIPHER_CAMELLIA) },
-            { "camellia-256-cfb", new EncryptorInfo("CAMELLIA-256-CFB128", 32, 16, CIPHER_CAMELLIA) },
-            { "rc4-md5", new EncryptorInfo("ARC4-128", 16, 16, CIPHER_RC4) }
-        };
-
-        public static List<string> SupportedCiphers()
-        {
-            return new List<string>(_ciphers.Keys);
-        }
-
-        protected override Dictionary<string, EncryptorInfo> getCiphers()
-        {
-            return _ciphers;
-        }
-
-        protected override void initCipher(byte[] iv, bool isEncrypt)
-        {
-            base.initCipher(iv, isEncrypt);
-            IntPtr ctx = Marshal.AllocHGlobal(MbedTLS.cipher_get_size_ex());
-            if (isEncrypt)
-            {
-                _encryptCtx = ctx;
-            }
-            else
-            {
-                _decryptCtx = ctx;
-            }
-            byte[] realkey;
-            if (_method == "rc4-md5")
-            {
-                byte[] temp = new byte[keyLen + ivLen];
-                Array.Copy(_key, 0, temp, 0, keyLen);
-                Array.Copy(iv, 0, temp, keyLen, ivLen);
-                realkey = MbedTLS.MD5(temp);
-            }
-            else
-            {
-                realkey = _key;
-            }
-            MbedTLS.cipher_init(ctx);
-            if (MbedTLS.cipher_setup( ctx, MbedTLS.cipher_info_from_string( _innerLibName ) ) != 0 )
-                throw new System.Exception("Cannot initialize mbed TLS cipher context");
-            /*
-             * MbedTLS takes key length by bit
-             * cipher_setkey() will set the correct key schedule
-             * and operation
-             *
-             *  MBEDTLS_AES_{EN,DE}CRYPT
-             *  == MBEDTLS_BLOWFISH_{EN,DE}CRYPT
-             *  == MBEDTLS_CAMELLIA_{EN,DE}CRYPT
-             *  == MBEDTLS_{EN,DE}CRYPT
-             *  
-             */
-            if (MbedTLS.cipher_setkey(ctx, realkey, keyLen * 8,
-                isEncrypt ? MbedTLS.MBEDTLS_ENCRYPT : MbedTLS.MBEDTLS_DECRYPT) != 0 )
-                throw new System.Exception("Cannot set mbed TLS cipher key");
-            if (MbedTLS.cipher_set_iv(ctx, iv, ivLen) != 0)
-                throw new System.Exception("Cannot set mbed TLS cipher IV");
-            if (MbedTLS.cipher_reset(ctx) != 0)
-                throw new System.Exception("Cannot finalize mbed TLS cipher context");
-        }
-
-        protected override void cipherUpdate(bool isEncrypt, int length, byte[] buf, byte[] outbuf)
-        {
-            // C# could be multi-threaded
-            if (_disposed)
-            {
-                throw new ObjectDisposedException(this.ToString());
-            }
-            if (MbedTLS.cipher_update(isEncrypt ? _encryptCtx : _decryptCtx,
-                buf, length, outbuf, ref length) != 0 )
-                throw new CryptoErrorException();
-        }
-
-        #region IDisposable
-
-        private bool _disposed;
-
-        // instance based lock
-        private readonly object _lock = new object();
-
-        public override void Dispose()
-        {
-            Dispose(true);
-            GC.SuppressFinalize(this);
-        }
-
-        ~StreamMbedTLSEncryptor()
-        {
-            Dispose(false);
-        }
-
-        protected virtual void Dispose(bool disposing)
-        {
-            lock (_lock)
-            {
-                if (_disposed) return;
-                _disposed = true;
-            }
-
-            if (disposing)
-            {
-                // free managed objects
-            }
-
-            // free unmanaged objects
-            if (_encryptCtx != IntPtr.Zero)
-            {
-                MbedTLS.cipher_free(_encryptCtx);
-                Marshal.FreeHGlobal(_encryptCtx);
-                _encryptCtx = IntPtr.Zero;
-            }
-            if (_decryptCtx != IntPtr.Zero)
-            {
-                MbedTLS.cipher_free(_decryptCtx);
-                Marshal.FreeHGlobal(_decryptCtx);
-                _decryptCtx = IntPtr.Zero;
-            }
-        }
-
-        #endregion
-    }
-}

shadowsocks-csharp/Encryption/Stream/StreamNativeEncryptor.cs

@@ -0,0 +1,213 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Shadowsocks.Encryption.Stream
+{
+    public class StreamNativeEncryptor : StreamEncryptor
+    {
+        const int Plain = 0;
+        const int Table = 1;
+        const int Rc4 = 2;
+        const int Rc4Md5 = 3;
+
+        string _password;
+
+        byte[] realkey;
+        byte[] sbox;
+        public StreamNativeEncryptor(string method, string password) : base(method, password)
+        {
+            _password = password;
+        }
+
+        public override void Dispose()
+        {
+            return;
+        }
+
+        protected override void initCipher(byte[] iv, bool isEncrypt)
+        {
+            base.initCipher(iv, isEncrypt);
+            if (_cipher >= Rc4)
+            {
+                if (_cipher == Rc4Md5)
+                {
+                    byte[] temp = new byte[keyLen + ivLen];
+                    Array.Copy(_key, 0, temp, 0, keyLen);
+                    Array.Copy(iv, 0, temp, keyLen, ivLen);
+                    realkey = CryptoUtils.MD5(temp);
+                }
+                else
+                {
+                    realkey = _key;
+                }
+                sbox = SBox(realkey);
+            }
+            else if (_cipher == Table)
+            {
+                ulong a = BitConverter.ToUInt64(CryptoUtils.MD5(Encoding.UTF8.GetBytes(_password)), 0);
+                for (int i = 0; i < 256; i++)
+                {
+                    _encryptTable[i] = (byte)i;
+                }
+                for (int i = 1; i < 1024; i++)
+                {
+                    _encryptTable = MergeSort(_encryptTable, a, i);
+                }
+                for (int i = 0; i < 256; i++)
+                {
+                    _decryptTable[_encryptTable[i]] = (byte)i;
+                }
+            }
+        }
+
+        protected override void cipherUpdate(bool isEncrypt, int length, byte[] buf, byte[] outbuf)
+        {
+            if (_cipher == Table)
+            {
+                var table = isEncrypt ? _encryptTable : _decryptTable;
+                for (int i = 0; i < length; i++)
+                {
+                    outbuf[i] = table[buf[i]];
+                }
+            }
+            else if (_cipher == Plain)
+            {
+                Array.Copy(buf, outbuf, length);
+            }
+            else
+            {
+                var ctx = isEncrypt ? enc_ctx : dec_ctx;
+
+                byte[] t = new byte[length];
+                Array.Copy(buf, t, length);
+
+                RC4(ctx, sbox, t, length);
+                Array.Copy(t, outbuf, length);
+            }
+        }
+
+        private static readonly Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo>
+        {
+            {"plain", new EncryptorInfo("PLAIN", 0, 0, Plain) },
+            {"table", new EncryptorInfo("TABLE", 0, 0, Table) },
+            { "rc4", new EncryptorInfo("RC4", 16, 0, Rc4) }, // original RC4 doesn't use IV
+            { "rc4-md5", new EncryptorInfo("RC4", 16, 16, Rc4Md5) },
+        };
+
+        public static IEnumerable<string> SupportedCiphers()
+        {
+            return _ciphers.Keys;
+        }
+
+        protected override Dictionary<string, EncryptorInfo> getCiphers()
+        {
+            return _ciphers;
+        }
+
+        #region Table
+        private byte[] _encryptTable = new byte[256];
+        private byte[] _decryptTable = new byte[256];
+
+        private static long Compare(byte x, byte y, ulong a, int i)
+        {
+            return (long)(a % (ulong)(x + i)) - (long)(a % (ulong)(y + i));
+        }
+
+        private byte[] MergeSort(byte[] array, ulong a, int j)
+        {
+            if (array.Length == 1)
+            {
+                return array;
+            }
+            int middle = array.Length / 2;
+            byte[] left = new byte[middle];
+            for (int i = 0; i < middle; i++)
+            {
+                left[i] = array[i];
+            }
+            byte[] right = new byte[array.Length - middle];
+            for (int i = 0; i < array.Length - middle; i++)
+            {
+                right[i] = array[i + middle];
+            }
+            left = MergeSort(left, a, j);
+            right = MergeSort(right, a, j);
+
+            int leftptr = 0;
+            int rightptr = 0;
+
+            byte[] sorted = new byte[array.Length];
+            for (int k = 0; k < array.Length; k++)
+            {
+                if (rightptr == right.Length || ((leftptr < left.Length) && (Compare(left[leftptr], right[rightptr], a, j) <= 0)))
+                {
+                    sorted[k] = left[leftptr];
+                    leftptr++;
+                }
+                else if (leftptr == left.Length || ((rightptr < right.Length) && (Compare(right[rightptr], left[leftptr], a, j)) <= 0))
+                {
+                    sorted[k] = right[rightptr];
+                    rightptr++;
+                }
+            }
+            return sorted;
+        }
+        #endregion
+
+        #region RC4
+        class Context
+        {
+            public int index1 = 0;
+            public int index2 = 0;
+        }
+
+        private Context enc_ctx = new Context();
+        private Context dec_ctx = new Context();
+
+        private byte[] SBox(byte[] key)
+        {
+            byte[] s = new byte[256];
+
+            for (int i = 0; i < 256; i++)
+            {
+                s[i] = (byte)i;
+            }
+
+            for (int i = 0, j = 0; i < 256; i++)
+            {
+                j = (j + key[i % key.Length] + s[i]) & 255;
+
+                Swap(s, i, j);
+            }
+
+            return s;
+        }
+
+        private void RC4(Context ctx, byte[] s, byte[] data, int length)
+        {
+            for (int n = 0; n < length; n++)
+            {
+                byte b = data[n];
+
+                ctx.index1 = (ctx.index1 + 1) & 255;
+                ctx.index2 = (ctx.index2 + s[ctx.index1]) & 255;
+
+                Swap(s, ctx.index1, ctx.index2);
+
+                data[n] = (byte)(b ^ s[(s[ctx.index1] + s[ctx.index2]) & 255]);
+            }
+        }
+
+        private static void Swap(byte[] s, int i, int j)
+        {
+            byte c = s[i];
+
+            s[i] = s[j];
+            s[j] = c;
+        }
+        #endregion
+    }
+}

shadowsocks-csharp/Encryption/Stream/StreamOpenSSLEncryptor.cs

@@ -1,159 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using Shadowsocks.Encryption.Exception;
-
-
-namespace Shadowsocks.Encryption.Stream
-{
-    public class StreamOpenSSLEncryptor
-        : StreamEncryptor, IDisposable
-    {
-        const int CIPHER_RC4 = 1;
-        const int CIPHER_AES = 2;
-        const int CIPHER_CAMELLIA = 3;
-        const int CIPHER_BLOWFISH = 4;
-        const int CIPHER_CHACHA20_IETF = 5;
-
-        private IntPtr _encryptCtx = IntPtr.Zero;
-        private IntPtr _decryptCtx = IntPtr.Zero;
-
-        public StreamOpenSSLEncryptor(string method, string password)
-            : base(method, password)
-        {
-        }
-
-        // XXX: name=RC4,blkSz=1,keyLen=16,ivLen=0, do NOT pass IV to it
-        private static readonly Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo>
-        {
-            { "aes-128-cfb", new EncryptorInfo("AES-128-CFB", 16, 16, CIPHER_AES) },
-            { "aes-192-cfb", new EncryptorInfo("AES-192-CFB", 24, 16, CIPHER_AES) },
-            { "aes-256-cfb", new EncryptorInfo("AES-256-CFB", 32, 16, CIPHER_AES) },
-            { "aes-128-ctr", new EncryptorInfo("aes-128-ctr", 16, 16, CIPHER_AES) },
-            { "aes-192-ctr", new EncryptorInfo("aes-192-ctr", 24, 16, CIPHER_AES) },
-            { "aes-256-ctr", new EncryptorInfo("aes-256-ctr", 32, 16, CIPHER_AES) },
-            { "bf-cfb", new EncryptorInfo("bf-cfb", 16, 8, CIPHER_BLOWFISH) },
-            { "camellia-128-cfb", new EncryptorInfo("CAMELLIA-128-CFB", 16, 16, CIPHER_CAMELLIA) },
-            { "camellia-192-cfb", new EncryptorInfo("CAMELLIA-192-CFB", 24, 16, CIPHER_CAMELLIA) },
-            { "camellia-256-cfb", new EncryptorInfo("CAMELLIA-256-CFB", 32, 16, CIPHER_CAMELLIA) },
-            { "rc4-md5", new EncryptorInfo("RC4", 16, 16, CIPHER_RC4) },
-            // it's using ivLen=16, not compatible
-            //{ "chacha20-ietf", new EncryptorInfo("chacha20", 32, 12, CIPHER_CHACHA20_IETF) }
-        };
-
-        public static List<string> SupportedCiphers()
-        {
-            return new List<string>(_ciphers.Keys);
-        }
-
-        protected override Dictionary<string, EncryptorInfo> getCiphers()
-        {
-            return _ciphers;
-        }
-
-        protected override void initCipher(byte[] iv, bool isEncrypt)
-        {
-            base.initCipher(iv, isEncrypt);
-            IntPtr cipherInfo = OpenSSL.GetCipherInfo(_innerLibName);
-            if (cipherInfo == IntPtr.Zero) throw new System.Exception("openssl: cipher not found");
-            IntPtr ctx = OpenSSL.EVP_CIPHER_CTX_new();
-            if (ctx == IntPtr.Zero) throw new System.Exception("fail to create ctx");
-            
-            if (isEncrypt)
-            {
-                _encryptCtx = ctx;
-            }
-            else
-            {
-                _decryptCtx = ctx;
-            }
-
-            byte[] realkey;
-            if (_method == "rc4-md5")
-            {
-                byte[] temp = new byte[keyLen + ivLen];
-                Array.Copy(_key, 0, temp, 0, keyLen);
-                Array.Copy(iv, 0, temp, keyLen, ivLen);
-                realkey = MbedTLS.MD5(temp);
-            }
-            else
-            {
-                realkey = _key;
-            }
-            
-            var ret = OpenSSL.EVP_CipherInit_ex(ctx, cipherInfo, IntPtr.Zero, null,null,
-                isEncrypt ? OpenSSL.OPENSSL_ENCRYPT : OpenSSL.OPENSSL_DECRYPT);
-            if (ret != 1) throw new System.Exception("openssl: fail to set key length");
-            ret = OpenSSL.EVP_CIPHER_CTX_set_key_length(ctx, keyLen);
-            if (ret != 1) throw new System.Exception("openssl: fail to set key length");
-            ret = OpenSSL.EVP_CipherInit_ex(ctx, IntPtr.Zero, IntPtr.Zero, realkey,
-                _method == "rc4-md5" ? null : iv,
-                isEncrypt ? OpenSSL.OPENSSL_ENCRYPT : OpenSSL.OPENSSL_DECRYPT);
-            if (ret != 1) throw new System.Exception("openssl: cannot set key and iv");
-            OpenSSL.EVP_CIPHER_CTX_set_padding(ctx, 0);
-        }
-
-        protected override void cipherUpdate(bool isEncrypt, int length, byte[] buf, byte[] outbuf)
-        {
-            // C# could be multi-threaded
-            if (_disposed)
-            {
-                throw new ObjectDisposedException(this.ToString());
-            }
-
-            int outlen = 0;
-            var ret = OpenSSL.EVP_CipherUpdate(isEncrypt ? _encryptCtx : _decryptCtx,
-                outbuf, out outlen, buf, length);
-            if (ret != 1)
-                throw new CryptoErrorException(String.Format("ret is {0}", ret));
-            Debug.Assert(outlen == length);
-        }
-
-        #region IDisposable
-
-        private bool _disposed;
-
-        // instance based lock
-        private readonly object _lock = new object();
-
-        public override void Dispose()
-        {
-            Dispose(true);
-            GC.SuppressFinalize(this);
-        }
-
-        ~StreamOpenSSLEncryptor()
-        {
-            Dispose(false);
-        }
-
-        protected virtual void Dispose(bool disposing)
-        {
-            lock (_lock)
-            {
-                if (_disposed) return;
-                _disposed = true;
-            }
-
-            if (disposing)
-            {
-                // free managed objects
-            }
-
-            // free unmanaged objects
-            if (_encryptCtx != IntPtr.Zero)
-            {
-                OpenSSL.EVP_CIPHER_CTX_free(_encryptCtx);
-                _encryptCtx = IntPtr.Zero;
-            }
-
-            if (_decryptCtx != IntPtr.Zero)
-            {
-                OpenSSL.EVP_CIPHER_CTX_free(_decryptCtx);
-                _decryptCtx = IntPtr.Zero;
-            }
-        }
-
-        #endregion
-    }
-}

shadowsocks-csharp/Encryption/Stream/StreamSodiumEncryptor.cs

@@ -1,107 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Shadowsocks.Encryption.Exception;
-
-namespace Shadowsocks.Encryption.Stream
-{
-    public class StreamSodiumEncryptor
-        : StreamEncryptor, IDisposable
-    {
-        const int CIPHER_SALSA20 = 1;
-        const int CIPHER_CHACHA20 = 2;
-        const int CIPHER_CHACHA20_IETF = 3;
-
-        const int SODIUM_BLOCK_SIZE = 64;
-
-        protected int _encryptBytesRemaining;
-        protected int _decryptBytesRemaining;
-        protected ulong _encryptIC;
-        protected ulong _decryptIC;
-        protected byte[] _encryptBuf;
-        protected byte[] _decryptBuf;
-
-        public StreamSodiumEncryptor(string method, string password)
-            : base(method, password)
-        {
-            _encryptBuf = new byte[MAX_INPUT_SIZE + SODIUM_BLOCK_SIZE];
-            _decryptBuf = new byte[MAX_INPUT_SIZE + SODIUM_BLOCK_SIZE];
-        }
-
-        private static readonly Dictionary<string, EncryptorInfo> _ciphers = new Dictionary<string, EncryptorInfo> {
-            { "salsa20", new EncryptorInfo(32, 8, CIPHER_SALSA20) },
-            { "chacha20", new EncryptorInfo(32, 8, CIPHER_CHACHA20) },
-            { "chacha20-ietf", new EncryptorInfo(32, 12, CIPHER_CHACHA20_IETF) }
-        };
-
-        protected override Dictionary<string, EncryptorInfo> getCiphers()
-        {
-            return _ciphers;
-        }
-
-        public static List<string> SupportedCiphers()
-        {
-            return new List<string>(_ciphers.Keys);
-        }
-
-        protected override void cipherUpdate(bool isEncrypt, int length, byte[] buf, byte[] outbuf)
-        {
-            // TODO write a unidirection cipher so we don't have to if if if
-            int bytesRemaining;
-            ulong ic;
-            byte[] sodiumBuf;
-            byte[] iv;
-            int ret = -1;
-
-            if (isEncrypt)
-            {
-                bytesRemaining = _encryptBytesRemaining;
-                ic = _encryptIC;
-                sodiumBuf = _encryptBuf;
-                iv = _encryptIV;
-            }
-            else
-            {
-                bytesRemaining = _decryptBytesRemaining;
-                ic = _decryptIC;
-                sodiumBuf = _decryptBuf;
-                iv = _decryptIV;
-            }
-            int padding = bytesRemaining;
-            Buffer.BlockCopy(buf, 0, sodiumBuf, padding, length);
-
-            switch (_cipher)
-            {
-                case CIPHER_SALSA20:
-                    ret = Sodium.crypto_stream_salsa20_xor_ic(sodiumBuf, sodiumBuf, (ulong)(padding + length), iv, ic, _key);
-                    break;
-                case CIPHER_CHACHA20:
-                    ret = Sodium.crypto_stream_chacha20_xor_ic(sodiumBuf, sodiumBuf, (ulong)(padding + length), iv, ic, _key);
-                    break;
-                case CIPHER_CHACHA20_IETF:
-                    ret = Sodium.crypto_stream_chacha20_ietf_xor_ic(sodiumBuf, sodiumBuf, (ulong)(padding + length), iv, (uint)ic, _key);
-                    break;
-            }
-            if (ret != 0) throw new CryptoErrorException();
-
-            Buffer.BlockCopy(sodiumBuf, padding, outbuf, 0, length);
-            padding += length;
-            ic += (ulong)padding / SODIUM_BLOCK_SIZE;
-            bytesRemaining = padding % SODIUM_BLOCK_SIZE;
-
-            if (isEncrypt)
-            {
-                _encryptBytesRemaining = bytesRemaining;
-                _encryptIC = ic;
-            }
-            else
-            {
-                _decryptBytesRemaining = bytesRemaining;
-                _decryptIC = ic;
-            }
-        }
-
-        public override void Dispose()
-        {
-        }
-    }
-}

shadowsocks-csharp/Properties/Resources.Designer.cs

@@ -1,10 +1,10 @@
 //------------------------------------------------------------------------------
 // <auto-generated>
-//     This code was generated by a tool.
-//     Runtime Version:4.0.30319.42000
+//     此代码由工具生成。
+//     运行时版本:4.0.30319.42000
 //
-//     Changes to this file may cause incorrect behavior and will be lost if
-//     the code is regenerated.
+//     对此文件的更改可能会导致不正确的行为，并且如果
+//     重新生成代码，这些更改将会丢失。
 // </auto-generated>
 //------------------------------------------------------------------------------
 
@@ -13,12 +13,12 @@ namespace Shadowsocks.Properties {
     
     
     /// <summary>
-    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    ///   一个强类型的资源类，用于查找本地化的字符串等。
     /// </summary>
-    // This class was auto-generated by the StronglyTypedResourceBuilder
-    // class via a tool like ResGen or Visual Studio.
-    // To add or remove a member, edit your .ResX file then rerun ResGen
-    // with the /str option, or rebuild your VS project.
+    // 此类是由 StronglyTypedResourceBuilder
+    // 类通过类似于 ResGen 或 Visual Studio 的工具自动生成的。
+    // 若要添加或移除成员，请编辑 .ResX 文件，然后重新运行 ResGen
+    // (以 /str 作为命令选项)，或重新生成 VS 项目。
     [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "16.0.0.0")]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
@@ -33,7 +33,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Returns the cached ResourceManager instance used by this class.
+        ///   返回此类使用的缓存的 ResourceManager 实例。
         /// </summary>
         [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
         internal static global::System.Resources.ResourceManager ResourceManager {
@@ -47,8 +47,8 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Overrides the current thread's CurrentUICulture property for all
-        ///   resource lookups using this strongly typed resource class.
+        ///   重写当前线程的 CurrentUICulture 属性
+        ///   重写当前线程的 CurrentUICulture 属性。
         /// </summary>
         [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
         internal static global::System.Globalization.CultureInfo Culture {
@@ -61,7 +61,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to /* eslint-disable */
+        ///   查找类似 /* eslint-disable */
         ///// Was generated by gfwlist2pac in precise mode
         ///// https://github.com/clowwindy/gfwlist2pac
         ///
@@ -76,7 +76,7 @@ namespace Shadowsocks.Properties {
         ///* This file is part of Adblock Plus &lt;http://adblockplus.org/&gt;,
         ///* Copyright (C) 2006-2014 Eyeo GmbH
         ///*
-        ///* Adblock Plus is free software: you can redistribute it and/or  [rest of string was truncated]&quot;;.
+        ///* Adblock Plus is free software: you can redistribute it and/or  [字符串的其余部分被截断]&quot;; 的本地化字符串。
         /// </summary>
         internal static string abp_js {
             get {
@@ -85,29 +85,28 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to var __USERRULES__ = [];
-        ///var __RULES__ = [
-        ///    &quot;|http://85.17.73.31/&quot;,
-        ///    &quot;||agnesb.fr&quot;,
-        ///    &quot;||akiba-web.com&quot;,
-        ///    &quot;||altrec.com&quot;,
-        ///    &quot;||angela-merkel.de&quot;,
-        ///    &quot;||angola.org&quot;,
-        ///    &quot;||apartmentratings.com&quot;,
-        ///    &quot;||apartments.com&quot;,
-        ///    &quot;||arena.taipei&quot;,
-        ///    &quot;||asianspiss.com&quot;,
-        ///    &quot;||assimp.org&quot;,
-        ///    &quot;||athenaeizou.com&quot;,
-        ///    &quot;||azubu.tv&quot;,
-        ///    &quot;||bankmobilevibe.com&quot;,
-        ///    &quot;||banorte.com&quot;,
-        ///    &quot;||bash-hackers.org&quot;,
-        ///    &quot;||beeg.com&quot;,
-        ///    &quot;||global.bing.com&quot;,
-        ///    &quot;||bloombergview.com&quot;,
-        ///    &quot;||booktopia.com.au&quot;,
-        /// [rest of string was truncated]&quot;;.
+        ///   查找类似 var __USERRULES__ = [];
+        ///var __RULES__ = [
+        ///    &quot;|http://85.17.73.31/&quot;,
+        ///    &quot;||agnesb.fr&quot;,
+        ///    &quot;||akiba-web.com&quot;,
+        ///    &quot;||altrec.com&quot;,
+        ///    &quot;||angela-merkel.de&quot;,
+        ///    &quot;||angola.org&quot;,
+        ///    &quot;||apartmentratings.com&quot;,
+        ///    &quot;||apartments.com&quot;,
+        ///    &quot;||arena.taipei&quot;,
+        ///    &quot;||asianspiss.com&quot;,
+        ///    &quot;||assimp.org&quot;,
+        ///    &quot;||athenaeizou.com&quot;,
+        ///    &quot;||azubu.tv&quot;,
+        ///    &quot;||bankmobilevibe.com&quot;,
+        ///    &quot;||banorte.com&quot;,
+        ///    &quot;||bash-hackers.org&quot;,
+        ///    &quot;||beeg.com&quot;,
+        ///    &quot;||global.bing.com&quot;,
+        ///    &quot;||bloombergview.com&quot;,
+        ///    &quot; [字符串的其余部分被截断]&quot;; 的本地化字符串。
         /// </summary>
         internal static string default_abp_rule {
             get {
@@ -116,24 +115,21 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to en,zh-CN,zh-TW,ja
-        ///#Restart program to apply translation,,,
-        ///#This is comment line,,,
-        ///#Always keep language name at head of file,,,
-        ///#Language name is output in log,,,
-        ///&quot;#You can find it by search &quot;&quot;Current language is:&quot;&quot;&quot;,,,
-        ///#Please use UTF-8 with BOM encoding so we can edit it in Excel,,,
-        ///,,,
-        ///Shadowsocks,Shadowsocks,Shadowsocks,Shadowsocks
-        ///,,,
-        ///#Menu,,,
-        ///,,,
-        ///System Proxy,系统代理,系統代理,システムプロキシ
-        ///Disable,禁用,禁用,無効
-        ///PAC,PAC 模式,PAC 模式,PAC
-        ///Global,全局模式,全局模式,全般
-        ///Servers,服务器,伺服器,サーバー
-        ///Edit Servers...,编辑服务器...,編輯伺服器...,サーバーの編集.. [rest of string was truncated]&quot;;.
+        ///   查找类似 en,ru-RU,zh-CN,zh-TW,ja
+        ///#Restart program to apply translation,,,,
+        ///#This is comment line,,,,
+        ///#Always keep language name at head of file,,,,
+        ///#Language name is output in log,,,,
+        ///&quot;#You can find it by search &quot;&quot;Current language is:&quot;&quot;&quot;,,,,
+        ///#Please use UTF-8 with BOM encoding so we can edit it in Excel,,,,
+        ///,,,,
+        ///Shadowsocks,Shadowsocks,Shadowsocks,Shadowsocks,Shadowsocks
+        ///,,,,
+        ///#Menu,,,,
+        ///,,,,
+        ///System Proxy,Системный прокси-сервер,系统代理,系統代理,システムプロキシ
+        ///Disable,Отключен,禁用,禁用,無効
+        ///PAC,Сценарий настройки (PAC),PA [字符串的其余部分被截断]&quot;; 的本地化字符串。
         /// </summary>
         internal static string i18n_csv {
             get {
@@ -142,26 +138,13 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Byte[].
-        /// </summary>
-        internal static byte[] libsscrypto_dll {
-            get {
-                object obj = ResourceManager.GetObject("libsscrypto_dll", resourceCulture);
-                return ((byte[])(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   Looks up a localized string similar to &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot; ?&gt;
+        ///   查找类似 &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot; ?&gt;
+        ///&lt;!-- Warning: Configuration may reset after shadowsocks upgrade. --&gt;
+        ///&lt;!-- If you messed it up, delete this file and Shadowsocks will create a new one. --&gt;
         ///&lt;nlog xmlns=&quot;http://www.nlog-project.org/schemas/NLog.xsd&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;&gt;
         ///  &lt;targets&gt;
-        ///    &lt;target name=&quot;file&quot; xsi:type=&quot;File&quot; fileName=&quot;shadowsocks.log&quot;/&gt;
-        ///    
-        ///  &lt;/targets&gt;
-        ///  &lt;rules&gt;
-        ///    &lt;logger name=&quot;Name.Space.Class1&quot; minlevel=&quot;Debug&quot; writeTo=&quot;f1&quot; /&gt;
-        ///  &lt;/rules&gt;
-        ///&lt;/nlog&gt;.
+        ///    &lt;!-- This line is managed by Shadowsocks. Do not modify it unless you know what you are doing.--&gt;
+        ///    &lt;target name=&quot;file&quot; xsi:type=&quot;File&quot; fileName=&quot;ss_win_temp\shadowsocks.log&quot; writ [字符串的其余部分被截断]&quot;; 的本地化字符串。
         /// </summary>
         internal static string NLog_config {
             get {
@@ -170,7 +153,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to listen-address __PRIVOXY_BIND_IP__:__PRIVOXY_BIND_PORT__
+        ///   查找类似 listen-address __PRIVOXY_BIND_IP__:__PRIVOXY_BIND_PORT__
         ///toggle 0
         ///logfile ss_privoxy.log
         ///show-on-task-bar 0
@@ -178,7 +161,7 @@ namespace Shadowsocks.Properties {
         ///forward-socks5 / __SOCKS_HOST__:__SOCKS_PORT__ .
         ///max-client-connections 2048
         ///hide-console
-        ///.
+        /// 的本地化字符串。
         /// </summary>
         internal static string privoxy_conf {
             get {
@@ -187,7 +170,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Byte[].
+        ///   查找 System.Byte[] 类型的本地化资源。
         /// </summary>
         internal static byte[] privoxy_exe {
             get {
@@ -197,7 +180,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
         /// </summary>
         internal static System.Drawing.Bitmap ss32Fill {
             get {
@@ -207,7 +190,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
         /// </summary>
         internal static System.Drawing.Bitmap ss32In {
             get {
@@ -217,7 +200,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
         /// </summary>
         internal static System.Drawing.Bitmap ss32Out {
             get {
@@ -227,7 +210,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
         /// </summary>
         internal static System.Drawing.Bitmap ss32Outline {
             get {
@@ -237,7 +220,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        ///   查找 System.Drawing.Bitmap 类型的本地化资源。
         /// </summary>
         internal static System.Drawing.Bitmap ssw128 {
             get {
@@ -247,7 +230,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Byte[].
+        ///   查找 System.Byte[] 类型的本地化资源。
         /// </summary>
         internal static byte[] sysproxy_exe {
             get {
@@ -257,7 +240,7 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized resource of type System.Byte[].
+        ///   查找 System.Byte[] 类型的本地化资源。
         /// </summary>
         internal static byte[] sysproxy64_exe {
             get {
@@ -267,9 +250,9 @@ namespace Shadowsocks.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to ! Put user rules line by line in this file.
+        ///   查找类似 ! Put user rules line by line in this file.
         ///! See https://adblockplus.org/en/filter-cheatsheet
-        ///.
+        /// 的本地化字符串。
         /// </summary>
         internal static string user_rule {
             get {

shadowsocks-csharp/Properties/Resources.resx

@@ -127,9 +127,6 @@
   <data name="i18n_csv" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Data\i18n.csv;System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089;utf-8</value>
   </data>
-  <data name="libsscrypto_dll" type="System.Resources.ResXFileRef, System.Windows.Forms">
-    <value>..\Data\libsscrypto.dll.gz;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </data>
   <data name="NLog_config" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\data\nlog.config;System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089;utf-8</value>
   </data>

shadowsocks-csharp/View/ConfigForm.cs

@@ -31,6 +31,18 @@ namespace Shadowsocks.View
                 "salsa20",
                 "chacha20",
                 "bf-cfb",
+
+                "rc4",
+                "plain",
+                "table",
+            };
+            private static string[] inuseMethod = new string[]
+            {
+                "aes-256-gcm",
+                "aes-192-gcm",
+                "aes-128-gcm",
+                "chacha20-ietf-poly1305",
+                "xchacha20-ietf-poly1305",
                 "chacha20-ietf",
                 "aes-256-cfb",
                 "aes-192-cfb",
@@ -42,14 +54,7 @@ namespace Shadowsocks.View
                 "camellia-192-cfb",
                 "camellia-128-cfb",
             };
-            private static string[] inuseMethod = new string[]
-            {
-                "aes-256-gcm",
-                "aes-192-gcm",
-                "aes-128-gcm",
-                "chacha20-ietf-poly1305",
-                "xchacha20-ietf-poly1305",
-            };
+
             public static EncryptionMethod[] AllMethods
             {
                 get

shadowsocks-csharp/packages.config

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="BouncyCastle" version="1.8.5" targetFramework="net472" />
+  <package id="Caseless.Fody" version="1.8.3" targetFramework="net472" />
+  <package id="Costura.Fody" version="3.3.3" targetFramework="net472" />
+  <package id="Fody" version="4.2.1" targetFramework="net472" developmentDependency="true" />
+  <package id="GlobalHotKey" version="1.1.0" targetFramework="net472" />
+  <package id="Newtonsoft.Json" version="12.0.2" targetFramework="net472" />
+  <package id="NLog" version="4.6.8" targetFramework="net472" />
+  <package id="StringEx.CS" version="0.3.1" targetFramework="net472" developmentDependency="true" />
+  <package id="ZXing.Net" version="0.16.5" targetFramework="net472" />
+</packages>

shadowsocks-csharp/shadowsocks-csharp.csproj

@@ -14,11 +14,6 @@
     <StartupObject />
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
-    <Prefer32Bit>true</Prefer32Bit>
-    <PlatformTarget>x86</PlatformTarget>
-  </PropertyGroup>
-
   <ItemGroup>
     <None Remove="app.config" />
     <None Remove="app.manifest" />
@@ -62,6 +57,7 @@
     <PackageReference Include="GlobalHotKeyCore" Version="1.2.0" />
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="BouncyCastle.NetCore" Version="1.8.5" />
     <PackageReference Include="Caseless.Fody" Version="1.9.0" />
     <PackageReference Include="Costura.Fody" Version="4.1.0" />
     <PackageReference Include="Fody" Version="6.1.1">
@@ -86,7 +82,6 @@
     <Resource Include="Data\abp.js" />
     <Resource Include="Data\default-abp-rule.js" />
     <Resource Include="Data\i18n.csv" />
-    <Resource Include="Data\libsscrypto.dll.gz" />
     <Resource Include="Data\NLog.config" />
     <Resource Include="Data\privoxy.exe.gz" />
     <Resource Include="Data\privoxy_conf.txt" />

test/App.config

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+  <configSections>
+    <section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog"/>
+  </configSections>
+  <nlog>
+    <targets>
+      <target name="logconsole" type="Debugger" />
+    </targets>
+    <rules>
+      <logger name="*" minlevel="Trace" writeTo="logconsole" />
+    </rules>
+  </nlog>
+</configuration>

test/CryptographyTest.cs

@@ -1,10 +1,9 @@
-using System;
-using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
 using Shadowsocks.Encryption;
-using System.Threading;
-using System.Collections.Generic;
 using Shadowsocks.Encryption.Stream;
-using System.Diagnostics;
+using System;
+using System.Collections.Generic;
+using System.Threading;
 
 namespace Shadowsocks.Test
 {
@@ -22,7 +21,7 @@ namespace Shadowsocks.Test
                 var random = new Random();
                 random.NextBytes(bytes);
                 string md5str = Convert.ToBase64String(md5.ComputeHash(bytes));
-                string md5str2 = Convert.ToBase64String(MbedTLS.MD5(bytes));
+                string md5str2 = Convert.ToBase64String(CryptoUtils.MD5(bytes));
                 Assert.IsTrue(md5str == md5str2);
             }
         }
@@ -31,7 +30,7 @@ namespace Shadowsocks.Test
         {
             RNG.Reload();
             byte[] plain = new byte[16384];
-            byte[] cipher = new byte[plain.Length + 16];
+            byte[] cipher = new byte[plain.Length + 100];// AEAD with IPv4 address type needs +100
             byte[] plain2 = new byte[plain.Length + 16];
             int outLen = 0;
             int outLen2 = 0;
@@ -64,57 +63,15 @@ namespace Shadowsocks.Test
         private static object locker = new object();
 
         [TestMethod]
-        public void TestMbedTLSEncryption()
-        {
-            encryptionFailed = false;
-            // run it once before the multi-threading test to initialize global tables
-            RunSingleMbedTLSEncryptionThread();
-            List<Thread> threads = new List<Thread>();
-            for (int i = 0; i < 10; i++)
-            {
-                Thread t = new Thread(new ThreadStart(RunSingleMbedTLSEncryptionThread));
-                threads.Add(t);
-                t.Start();
-            }
-            foreach (Thread t in threads)
-            {
-                t.Join();
-            }
-            RNG.Close();
-            Assert.IsFalse(encryptionFailed);
-        }
-
-        private void RunSingleMbedTLSEncryptionThread()
-        {
-            try
-            {
-                for (int i = 0; i < 100; i++)
-                {
-                    IEncryptor encryptor;
-                    IEncryptor decryptor;
-                    encryptor = new StreamMbedTLSEncryptor("aes-256-cfb", "barfoo!");
-                    decryptor = new StreamMbedTLSEncryptor("aes-256-cfb", "barfoo!");
-                    RunEncryptionRound(encryptor, decryptor);
-                }
-            }
-            catch
-            {
-                encryptionFailed = true;
-                throw;
-            }
-        }
-
-        [TestMethod]
-        public void TestRC4Encryption()
+        public void TestBouncyCastleAEADEncryption()
         {
             encryptionFailed = false;
             // run it once before the multi-threading test to initialize global tables
-            RunSingleRC4EncryptionThread();
+            RunSingleBouncyCastleAEADEncryptionThread();
             List<Thread> threads = new List<Thread>();
             for (int i = 0; i < 10; i++)
             {
-                Thread t = new Thread(new ThreadStart(RunSingleRC4EncryptionThread));
-                threads.Add(t);
+                Thread t = new Thread(new ThreadStart(RunSingleBouncyCastleAEADEncryptionThread)); threads.Add(t);
                 t.Start();
             }
             foreach (Thread t in threads)
@@ -125,37 +82,16 @@ namespace Shadowsocks.Test
             Assert.IsFalse(encryptionFailed);
         }
 
-        private void RunSingleRC4EncryptionThread()
-        {
-            try
-            {
-                for (int i = 0; i < 100; i++)
-                {
-                    var random = new Random();
-                    IEncryptor encryptor;
-                    IEncryptor decryptor;
-                    encryptor = new StreamMbedTLSEncryptor("rc4-md5", "barfoo!");
-                    decryptor = new StreamMbedTLSEncryptor("rc4-md5", "barfoo!");
-                    RunEncryptionRound(encryptor, decryptor);
-                }
-            }
-            catch
-            {
-                encryptionFailed = true;
-                throw;
-            }
-        }
-
         [TestMethod]
-        public void TestSodiumEncryption()
+        public void TestNativeEncryption()
         {
             encryptionFailed = false;
             // run it once before the multi-threading test to initialize global tables
-            RunSingleSodiumEncryptionThread();
+            RunSingleNativeEncryptionThread();
             List<Thread> threads = new List<Thread>();
             for (int i = 0; i < 10; i++)
             {
-                Thread t = new Thread(new ThreadStart(RunSingleSodiumEncryptionThread));
+                Thread t = new Thread(new ThreadStart(RunSingleNativeEncryptionThread));
                 threads.Add(t);
                 t.Start();
             }
@@ -167,18 +103,17 @@ namespace Shadowsocks.Test
             Assert.IsFalse(encryptionFailed);
         }
 
-        private void RunSingleSodiumEncryptionThread()
+        private void RunSingleNativeEncryptionThread()
         {
             try
             {
                 for (int i = 0; i < 100; i++)
                 {
-                    var random = new Random();
-                    IEncryptor encryptor;
-                    IEncryptor decryptor;
-                    encryptor = new StreamSodiumEncryptor("salsa20", "barfoo!");
-                    decryptor = new StreamSodiumEncryptor("salsa20", "barfoo!");
-                    RunEncryptionRound(encryptor, decryptor);
+                    IEncryptor encryptorN;
+                    IEncryptor decryptorN;
+                    encryptorN = new StreamNativeEncryptor("rc4-md5", "barfoo!");
+                    decryptorN = new StreamNativeEncryptor("rc4-md5", "barfoo!");
+                    RunEncryptionRound(encryptorN, decryptorN);
                 }
             }
             catch
@@ -188,28 +123,7 @@ namespace Shadowsocks.Test
             }
         }
 
-        [TestMethod]
-        public void TestOpenSSLEncryption()
-        {
-            encryptionFailed = false;
-            // run it once before the multi-threading test to initialize global tables
-            RunSingleOpenSSLEncryptionThread();
-            List<Thread> threads = new List<Thread>();
-            for (int i = 0; i < 10; i++)
-            {
-                Thread t = new Thread(new ThreadStart(RunSingleOpenSSLEncryptionThread));
-                threads.Add(t);
-                t.Start();
-            }
-            foreach (Thread t in threads)
-            {
-                t.Join();
-            }
-            RNG.Close();
-            Assert.IsFalse(encryptionFailed);
-        }
-
-        private void RunSingleOpenSSLEncryptionThread()
+        private void RunSingleBouncyCastleAEADEncryptionThread()
         {
             try
             {
@@ -218,8 +132,10 @@ namespace Shadowsocks.Test
                     var random = new Random();
                     IEncryptor encryptor;
                     IEncryptor decryptor;
-                    encryptor = new StreamOpenSSLEncryptor("aes-256-cfb", "barfoo!");
-                    decryptor = new StreamOpenSSLEncryptor("aes-256-cfb", "barfoo!");
+                    encryptor = new Encryption.AEAD.AEADBouncyCastleEncryptor("aes-256-gcm", "barfoo!");
+                    encryptor.AddrBufLength = 1 + 4 + 2;// ADDR_ATYP_LEN + 4 + ADDR_PORT_LEN;
+                    decryptor = new Encryption.AEAD.AEADBouncyCastleEncryptor("aes-256-gcm", "barfoo!");
+                    decryptor.AddrBufLength = 1 + 4 + 2;// ADDR_ATYP_LEN + 4 + ADDR_PORT_LEN;
                     RunEncryptionRound(encryptor, decryptor);
                 }
             }
@@ -230,4 +146,4 @@ namespace Shadowsocks.Test
             }
         }
     }
-}
+}

test/ShadowsocksTest.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>netcoreapp3.1</TargetFramework>