From 039db17da7880692ed0e808d9a002fbc9e33f3c5 Mon Sep 17 00:00:00 2001
From: Asen Kovachev <akovachev@users.noreply.github.com>
Date: Fri, 4 May 2018 03:12:34 +0300
Subject: [PATCH] Add CRYPTOPP_ASSERT to match Keccak and SHA3 (#654)

As described in https://github.com/weidai11/cryptopp/issues/652 for consistency we should add assert in all hash transformations. The expectation is to have a good pointer and a non-0 length or a null pointer and 0-length.
---
 iterhash.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/iterhash.cpp b/iterhash.cpp
index bf287164..33a697a5 100644
--- a/iterhash.cpp
+++ b/iterhash.cpp
@@ -12,6 +12,7 @@ NAMESPACE_BEGIN(CryptoPP)
 
 template <class T, class BASE> void IteratedHashBase<T, BASE>::Update(const byte *input, size_t len)
 {
+	CRYPTOPP_ASSERT((input && len) || !(input || len));
 	HashWordType oldCountLo = m_countLo, oldCountHi = m_countHi;
 	if ((m_countLo = oldCountLo + HashWordType(len)) < oldCountLo)
 		m_countHi++;             // carry from low to high