Fixup under-aligned buffers when using AES on AltiVec and Power8

This commit supports the upcoming AltiVec and Power8 processor. This commit affects a number of classes due to the ubiquitous use of AES. The commit provides the data alignment requirements.

1 files changed, 3 insertions, 0 deletions

diff --git a/rijndael.h b/rijndael.h
index 483eab5a..2a1c44e8 100644
--- a/rijndael.h
+++ b/rijndael.h
@@ -39,6 +39,9 @@ class CRYPTOPP_DLL Rijndael : public Rijndael_Info, public BlockCipherDocumentat
 	class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Rijndael_Info>

 	{

 	public:

+		// Intel and ARM SIMD units can handle unaligned loads, but AltiVec and Power8 cannot.

+		unsigned int OptimalDataAlignment() const;

+

 		void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);

 

 	protected: