From 29d1f86b140939880100506555f56dfc3e1a1b0b Mon Sep 17 00:00:00 2001
From: Fernando Diaz Toledano <shargon@gmail.com>
Date: Wed, 8 Jan 2025 10:56:37 +0100
Subject: [PATCH 1/3] Close https://github.com/neo-project/neo/issues/1760

---
 src/Neo/Cryptography/Helper.cs           | 9 +++++++--
 src/Neo/Cryptography/RIPEMD160Managed.cs | 1 -
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/Neo/Cryptography/Helper.cs b/src/Neo/Cryptography/Helper.cs
index c6a3a72ae7..503fde8ae7 100644
--- a/src/Neo/Cryptography/Helper.cs
+++ b/src/Neo/Cryptography/Helper.cs
@@ -51,8 +51,13 @@ public static byte[] RIPEMD160(this byte[] value)
         /// <returns>The computed hash code.</returns>
         public static byte[] RIPEMD160(this ReadOnlySpan<byte> value)
         {
-            byte[] source = value.ToArray();
-            return source.RIPEMD160();
+            using var ripemd160 = new RIPEMD160Managed();
+
+            var output = new Span<byte>(new byte[ripemd160.HashSize]);
+            if (!ripemd160.TryComputeHash(value, output, out _))
+                throw new Exception();
+
+            return output.ToArray();
         }
 
         /// <summary>
diff --git a/src/Neo/Cryptography/RIPEMD160Managed.cs b/src/Neo/Cryptography/RIPEMD160Managed.cs
index 19a406d20f..4175aefffc 100644
--- a/src/Neo/Cryptography/RIPEMD160Managed.cs
+++ b/src/Neo/Cryptography/RIPEMD160Managed.cs
@@ -12,7 +12,6 @@
 using System;
 using System.Runtime.InteropServices;
 using System.Security;
-using System.Security.Cryptography;
 
 namespace Neo.Cryptography
 {

From 77eb24fcc2f0f316c470a851cf87fb1d12636824 Mon Sep 17 00:00:00 2001
From: Shargon <shargon@gmail.com>
Date: Wed, 8 Jan 2025 14:42:52 +0100
Subject: [PATCH 2/3] Update src/Neo/Cryptography/Helper.cs

Co-authored-by: nan01ab <yjcc201374@outlook.com>
---
 src/Neo/Cryptography/Helper.cs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/Neo/Cryptography/Helper.cs b/src/Neo/Cryptography/Helper.cs
index 503fde8ae7..36a0927884 100644
--- a/src/Neo/Cryptography/Helper.cs
+++ b/src/Neo/Cryptography/Helper.cs
@@ -53,11 +53,10 @@ public static byte[] RIPEMD160(this ReadOnlySpan<byte> value)
         {
             using var ripemd160 = new RIPEMD160Managed();
 
-            var output = new Span<byte>(new byte[ripemd160.HashSize]);
-            if (!ripemd160.TryComputeHash(value, output, out _))
+            var output = new byte[ripemd160.HashSize / 8];
+            if (!ripemd160.TryComputeHash(value, output.AsSpan(), out _))
                 throw new Exception();
-
-            return output.ToArray();
+            return output;
         }
 
         /// <summary>

From 8ccdc6952fa1f5b9e858714dae6034cb39df87d6 Mon Sep 17 00:00:00 2001
From: Shargon <shargon@gmail.com>
Date: Sat, 11 Jan 2025 22:21:13 +0100
Subject: [PATCH 3/3] Update src/Neo/Cryptography/Helper.cs

Co-authored-by: Christopher Schuchardt <cschuchardt88@gmail.com>
---
 src/Neo/Cryptography/Helper.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Neo/Cryptography/Helper.cs b/src/Neo/Cryptography/Helper.cs
index 36a0927884..08671380df 100644
--- a/src/Neo/Cryptography/Helper.cs
+++ b/src/Neo/Cryptography/Helper.cs
@@ -55,7 +55,7 @@ public static byte[] RIPEMD160(this ReadOnlySpan<byte> value)
 
             var output = new byte[ripemd160.HashSize / 8];
             if (!ripemd160.TryComputeHash(value, output.AsSpan(), out _))
-                throw new Exception();
+                throw new CryptographicException();
             return output;
         }