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, 9 insertions, 0 deletions

diff --git a/rijndael.cpp b/rijndael.cpp
index 3c2a2cad..5a354cfa 100644
--- a/rijndael.cpp
+++ b/rijndael.cpp
@@ -220,6 +220,15 @@ void Rijndael::Base::FillDecTable()
 	s_TdFilled = true;

 }

 

+unsigned int Rijndael::Base::OptimalDataAlignment() const

+{

+#if CRYPTOPP_BOOL_ALIGN16

+	return 16;

+#else

+	return GetAlignmentOf<word32>();

+#endif

+}

+

 #if (CRYPTOPP_AESNI_AVAILABLE)

 extern void Rijndael_UncheckedSetKey_SSE4_AESNI(const byte *userKey, size_t keyLen, word32* rk);

 extern void Rijndael_UncheckedSetKeyRev_AESNI(word32 *key, unsigned int rounds);