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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/paddings/ISO10126d2Padding.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.Security;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Paddings
+{
+
+    /**
+    * A padder that adds ISO10126-2 padding to a block.
+    */
+    public class ISO10126d2Padding: IBlockCipherPadding
+    {
+        private SecureRandom random;
+
+        /**
+        * Initialise the padder.
+        *
+        * @param random a SecureRandom if available.
+        */
+        public void Init(
+			SecureRandom random)
+            //throws ArgumentException
+        {
+            this.random = CryptoServicesRegistrar.GetSecureRandom(random);
+        }
+
+		/**
+        * Return the name of the algorithm the cipher implements.
+        *
+        * @return the name of the algorithm the cipher implements.
+        */
+        public string PaddingName
+        {
+            get { return "ISO10126-2"; }
+        }
+
+        public int AddPadding(byte[] input, int inOff)
+        {
+            int count = input.Length - inOff;
+            if (count > 1)
+            {
+                random.NextBytes(input, inOff, count - 1);
+            }
+            input[input.Length - 1] = (byte)count;
+
+            return count;
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public int AddPadding(Span<byte> block, int position)
+        {
+            int count = block.Length - position;
+            if (count > 1)
+            {
+                random.NextBytes(block[position..(block.Length - 1)]);
+            }
+            block[block.Length - 1] = (byte)count;
+
+            return count;
+        }
+#endif
+
+        public int PadCount(byte[] input)
+        {
+            int count = input[input.Length -1];
+            int position = input.Length - count;
+
+            int failed = (position | (count - 1)) >> 31;
+            if (failed != 0)
+                throw new InvalidCipherTextException("pad block corrupted");
+
+            return count;
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public int PadCount(ReadOnlySpan<byte> block)
+        {
+            int count = block[block.Length - 1];
+            int position = block.Length - count;
+
+            int failed = (position | (count - 1)) >> 31;
+            if (failed != 0)
+                throw new InvalidCipherTextException("pad block corrupted");
+
+            return count;
+        }
+#endif
+    }
+}
+#pragma warning restore
+#endif