rijndael: split AES-NI functions to separate file

* cipher/Makefile.in: Add 'rijndael-aesni.c'.
* cipher/rijndael-aesni.c: New.
* cipher/rijndael-internal.h: New.
* cipher/rijndael.c (MAXKC, MAXROUNDS, BLOCKSIZE, ATTR_ALIGNED_16)
(USE_AMD64_ASM, USE_ARM_ASM, USE_PADLOCK, USE_AESNI, RIJNDAEL_context)
(keyschenc, keyschdec, padlockkey): Move to 'rijndael-internal.h'.
(u128_s, aesni_prepare, aesni_cleanup, aesni_cleanup_2_6)
(aesni_do_setkey, do_aesni_enc, do_aesni_dec, do_aesni_enc_vec4)
(do_aesni_dec_vec4, do_aesni_cfb, do_aesni_ctr, do_aesni_ctr_4): Move
to 'rijndael-aesni.c'.
(prepare_decryption, rijndael_encrypt, _gcry_aes_cfb_enc)
(_gcry_aes_cbc_enc, _gcry_aes_ctr_enc, rijndael_decrypt)
(_gcry_aes_cfb_dec, _gcry_aes_cbc_dec) [USE_AESNI]: Move to functions
in 'rijdael-aesni.c'.
* configure.ac [mpi_cpu_arch=x86]: Add 'rijndael-aesni.lo'.
--

Clean-up rijndael.c before new new hardware acceleration support gets added.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>

1 files changed, 118 insertions, 0 deletions

diff --git a/cipher/rijndael-internal.h b/cipher/rijndael-internal.h
new file mode 100644
index 00000000..762ea767
--- /dev/null
+++ b/cipher/rijndael-internal.h
@@ -0,0 +1,118 @@
+/* Rijndael (AES) for GnuPG
+ * Copyright (C) 2000, 2001, 2002, 2003, 2007,
+ *               2008, 2011, 2012 Free Software Foundation, Inc.
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef G10_RIJNDAEL_INTERNAL_H
+#define G10_RIJNDAEL_INTERNAL_H
+
+#include "types.h"  /* for byte and u32 typedefs */
+
+
+#define MAXKC                   (256/32)
+#define MAXROUNDS               14
+#define BLOCKSIZE               (128/8)
+
+
+/* Helper macro to force alignment to 16 bytes.  */
+#ifdef HAVE_GCC_ATTRIBUTE_ALIGNED
+# define ATTR_ALIGNED_16  __attribute__ ((aligned (16)))
+#else
+# define ATTR_ALIGNED_16
+#endif
+
+
+/* USE_AMD64_ASM indicates whether to use AMD64 assembly code. */
+#undef USE_AMD64_ASM
+#if defined(__x86_64__) && defined(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS)
+# define USE_AMD64_ASM 1
+#endif
+
+/* USE_ARM_ASM indicates whether to use ARM assembly code. */
+#undef USE_ARM_ASM
+#if defined(__ARMEL__)
+# ifdef HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS
+#  define USE_ARM_ASM 1
+# endif
+#endif
+
+/* USE_PADLOCK indicates whether to compile the padlock specific
+   code.  */
+#undef USE_PADLOCK
+#ifdef ENABLE_PADLOCK_SUPPORT
+# ifdef HAVE_GCC_ATTRIBUTE_ALIGNED
+#  if (defined (__i386__) && SIZEOF_UNSIGNED_LONG == 4) || defined(__x86_64__)
+#   define USE_PADLOCK 1
+#  endif
+# endif
+#endif /*ENABLE_PADLOCK_SUPPORT*/
+
+/* USE_AESNI inidicates whether to compile with Intel AES-NI code.  We
+   need the vector-size attribute which seems to be available since
+   gcc 3.  However, to be on the safe side we require at least gcc 4.  */
+#undef USE_AESNI
+#ifdef ENABLE_AESNI_SUPPORT
+# if ((defined (__i386__) && SIZEOF_UNSIGNED_LONG == 4) || defined(__x86_64__))
+#  if __GNUC__ >= 4
+#   define USE_AESNI 1
+#  endif
+# endif
+#endif /* ENABLE_AESNI_SUPPORT */
+
+
+/* Our context object.  */
+typedef struct
+{
+  /* The first fields are the keyschedule arrays.  This is so that
+     they are aligned on a 16 byte boundary if using gcc.  This
+     alignment is required for the AES-NI code and a good idea in any
+     case.  The alignment is guaranteed due to the way cipher.c
+     allocates the space for the context.  The PROPERLY_ALIGNED_TYPE
+     hack is used to force a minimal alignment if not using gcc of if
+     the alignment requirement is higher that 16 bytes.  */
+  union
+  {
+    PROPERLY_ALIGNED_TYPE dummy;
+    byte keyschedule[MAXROUNDS+1][4][4];
+#ifdef USE_PADLOCK
+    /* The key as passed to the padlock engine.  It is only used if
+       the padlock engine is used (USE_PADLOCK, below).  */
+    unsigned char padlock_key[16] __attribute__ ((aligned (16)));
+#endif /*USE_PADLOCK*/
+  } u1;
+  union
+  {
+    PROPERLY_ALIGNED_TYPE dummy;
+    byte keyschedule[MAXROUNDS+1][4][4];
+  } u2;
+  int rounds;                /* Key-length-dependent number of rounds.  */
+  unsigned int decryption_prepared:1; /* The decryption key schedule is available.  */
+#ifdef USE_PADLOCK
+  unsigned int use_padlock:1;         /* Padlock shall be used.  */
+#endif /*USE_PADLOCK*/
+#ifdef USE_AESNI
+  unsigned int use_aesni:1;           /* AES-NI shall be used.  */
+#endif /*USE_AESNI*/
+} RIJNDAEL_context ATTR_ALIGNED_16;
+
+/* Macros defining alias for the keyschedules.  */
+#define keyschenc  u1.keyschedule
+#define keyschdec  u2.keyschedule
+#define padlockkey u1.padlock_key
+
+#endif /* G10_RIJNDAEL_INTERNAL_H */