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Packages/com.tivadar.best.http/Runtime/Shared/TLS/Crypto/Impl/FastTlsBlockCipherImpl.cs

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+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Tls.Crypto.Impl;
+
+namespace Best.HTTP.Shared.TLS.Crypto.Impl
+{
+    internal sealed class FastTlsBlockCipherImpl
+        : TlsBlockCipherImpl
+    {
+        private readonly bool m_isEncrypting;
+        private readonly IBlockCipher m_cipher;
+
+        private KeyParameter key;
+
+        internal FastTlsBlockCipherImpl(IBlockCipher cipher, bool isEncrypting)
+        {
+            this.m_cipher = cipher;
+            this.m_isEncrypting = isEncrypting;
+        }
+
+        public void SetKey(byte[] key, int keyOff, int keyLen)
+        {
+            this.key = new KeyParameter(key, keyOff, keyLen);
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public void SetKey(ReadOnlySpan<byte> key)
+        {
+            this.key = new KeyParameter(key);
+        }
+#endif
+
+        public void Init(byte[] iv, int ivOff, int ivLen)
+        {
+            m_cipher.Init(m_isEncrypting, new ParametersWithIV(key, iv, ivOff, ivLen));
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public void Init(ReadOnlySpan<byte> iv)
+        {
+            m_cipher.Init(m_isEncrypting, new ParametersWithIV(key, iv));
+        }
+#endif
+
+        public int DoFinal(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset)
+        {
+            int blockSize = m_cipher.GetBlockSize();
+
+            for (int i = 0; i < inputLength; i += blockSize)
+            {
+                m_cipher.ProcessBlock(input, inputOffset + i, output, outputOffset + i);
+            }
+
+            return inputLength;
+        }
+
+        public int GetBlockSize()
+        {
+            return m_cipher.GetBlockSize();
+        }
+    }
+}
+#pragma warning restore
+#endif