Merge branch 'master' into feature/bn254-curve-support

Author: Jim8y

benchmarks/Neo.Benchmarks/Benchmarks.Hash.cs

@@ -25,14 +25,6 @@ public class Benchmarks_Hash
 
         static readonly byte[] hash = "9182abedfbb9b18d81a05d8bcb45489e7daa2858".HexToBytes();
 
-        [Benchmark]
-        public void RIPEMD160_ComputeHash()
-        {
-            using var ripemd160 = new RIPEMD160Managed();
-            var result = ripemd160.ComputeHash(data);
-            Debug.Assert(result.SequenceEqual(hash));
-        }
-
         [Benchmark]
         public void XxHash32_HashToUInt32()
         {

src/Neo/Cryptography/Helper.cs

@@ -42,8 +42,11 @@ public static class Helper
         /// <returns>The computed hash code.</returns>
         public static byte[] RIPEMD160(this byte[] value)
         {
-            using var ripemd160 = new RIPEMD160Managed();
-            return ripemd160.ComputeHash(value);
+            var digest = new RipeMD160Digest();
+            var buffer = new byte[digest.GetDigestSize()];
+            digest.BlockUpdate(value, 0, value.Length);
+            digest.DoFinal(buffer, 0);
+            return buffer;
         }
 
         /// <summary>
@@ -53,12 +56,11 @@ public static byte[] RIPEMD160(this byte[] value)
         /// <returns>The computed hash code.</returns>
         public static byte[] RIPEMD160(this ReadOnlySpan<byte> value)
         {
-            using var ripemd160 = new RIPEMD160Managed();
-
-            var output = new byte[ripemd160.HashSize / 8];
-            if (!ripemd160.TryComputeHash(value, output.AsSpan(), out _))
-                throw new CryptographicException("Failed to compute RIPEMD160 hash. The hash computation operation could not be completed.");
-            return output;
+            var digest = new RipeMD160Digest();
+            var buffer = new byte[digest.GetDigestSize()];
+            digest.BlockUpdate(value);
+            digest.DoFinal(buffer, 0);
+            return buffer;
         }
 
         /// <summary>