From f962d703ace5e9af29676311b443d3ca0bfb201d Mon Sep 17 00:00:00 2001
From: barton26 <barton2526@gmail.com>
Date: Tue, 31 Aug 2021 16:45:39 -0400
Subject: [PATCH] ParseHash: Fail when length is not 64

---
 src/rpc/server.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
index 988ca7a10d..7ef750531b 100644
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -130,6 +130,8 @@ uint256 ParseHashV(const UniValue& v, string strName)
         strHex = v.get_str();
     if (!IsHex(strHex)) // Note: IsHex("") is false
         throw JSONRPCError(RPC_INVALID_PARAMETER, strName+" must be hexadecimal string (not '"+strHex+"')");
+    if (64 != strHex.length())
+        throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("%s must be of length %d (not %d)", strName, 64, strHex.length()));
     uint256 result;
     result.SetHex(strHex);
     return result;