From 76c29eadafc2a4df656a6505b58293ef4cfa3288 Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Sat, 12 Oct 2019 07:14:38 -0400
Subject: Add XTS block cipher mode of operation (GH #891, PR #892)

---
 cmac.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'cmac.h')

diff --git a/cmac.h b/cmac.h
index f3bcad48..59a9f020 100644
--- a/cmac.h
+++ b/cmac.h
@@ -10,6 +10,13 @@
 #include "seckey.h"
 #include "secblock.h"
 
+/// \brief Enable CMAC and wide block ciphers
+/// \details CMAC is only defined for AES. The library can support wide
+///  block ciphers like Kaylna and Threefish since we know the polynomials.
+#ifndef CRYPTOPP_CMAC_WIDE_BLOCK_CIPHERS
+# define CRYPTOPP_CMAC_WIDE_BLOCK_CIPHERS 1
+#endif  // CRYPTOPP_CMAC_WIDE_BLOCK_CIPHERS
+
 NAMESPACE_BEGIN(CryptoPP)
 
 /// \brief CMAC base implementation
@@ -19,7 +26,6 @@ class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CMAC_Base : public MessageAuthenticationCo
 public:
 
 	virtual ~CMAC_Base() {}
-
 	CMAC_Base() : m_counter(0) {}
 
 	void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params);
-- 
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