Make sure that ek and dk are aligned at 16 byte boundaries

ek and dk are used as operands in instructions that require 16 byte alignment.

Thanks to Greg Price for finding this issue.

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>

1 files changed, 4 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 998122e..5269e9d 100644
--- a/setup.py
+++ b/setup.py
@@ -166,6 +166,10 @@ class PCTBuildExt (build_ext):
         if not ac.get("HAVE_WMMINTRIN_H"):
             # AES-NI instrincs not available
             self.__remove_extensions(["Crypto.Cipher._AESNI"])
+        elif not (ac.get("HAVE_POSIX_MEMALIGN") or ac.get("HAVE_ALIGNED_ALLOC")
+                  or ac.get("HAVE__ALIGNED_MALLOC")):
+            # no function to allocate aligned memory is available
+            self.__remove_extensions(["Crypto.Cipher._AESNI"])
         elif ac.get("HAVE_MAES"):
             # -maes has to be passed to the compiler to use the AES-NI instrincs
             self.__add_extension_compile_option(["Crypto.Cipher._AESNI"],