Clear Clang finding in CMAC

1 files changed, 3 insertions, 1 deletions

diff --git a/cmac.cpp b/cmac.cpp
index 7a71236f..3ff57f1e 100644
--- a/cmac.cpp
+++ b/cmac.cpp
@@ -151,7 +151,9 @@ void CMAC_Base::TruncatedFinal(byte *mac, size_t size)
 	else

 		cipher.AdvancedProcessBlocks(m_reg, m_reg+blockSize, m_reg, blockSize, BlockTransformation::BT_DontIncrementInOutPointers|BlockTransformation::BT_XorInput);

 

-	memcpy(mac, m_reg, size);

+	// UBsan finding

+	if (mac)

+		memcpy(mac, m_reg, size);

 

 	m_counter = 0;

 	memset(m_reg, 0, blockSize);