lib/crypto/aesni.h

   1 /*
   2  * Copyright (C) 2008, Intel Corp.
   3  *    Author: Huang Ying <ying.huang@intel.com>
   4  *            Vinodh Gopal <vinodh.gopal@intel.com>
   5  *            Kahraman Akdemir
   6  *
   7  * Ported x86_64 version to x86:
   8  *    Author: Mathias Krause <minipli@googlemail.com>
   9  *
  10  * Modified for use in Samba by Justin Maggard <jmaggard@netgear.com>
  11  * and Jeremy Allison <jra@samba.org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  */
  18
  19 #ifndef LIB_CRYPTO_AESNI_H
  20 #define LIB_CRYPTO_AESNI_H 1
  21
  22 #if defined(HAVE_AESNI_INTEL)
  23
  24 #define AES_MAX_KEYLENGTH      (15 * 16)
  25 #define AES_MAX_KEYLENGTH_U32  (AES_MAX_KEYLENGTH / sizeof(uint32_t))
  26
  27 /*
  28  * Please ensure that the first two fields are 16-byte aligned
  29  * relative to the start of the structure, i.e., don't move them!
  30  */
  31 struct crypto_aes_ctx {
  32         uint32_t key_enc[AES_MAX_KEYLENGTH_U32];
  33         uint32_t key_dec[AES_MAX_KEYLENGTH_U32];
  34         uint32_t key_length;
  35 };
  36
  37 struct crypto_aesni_ctx {
  38         uint8_t _acc_ctx[sizeof(struct crypto_aes_ctx) + 16];
  39         struct crypto_aes_ctx *acc_ctx;
  40 };
  41
  42 /*
  43  * These next 4 functions are actually implemented
  44  * in the assembly language file:
  45  * third_party/aesni-intel/aesni-intel_asm.c
  46  */
  47
  48 int aesni_set_key(struct crypto_aes_ctx *ctx,
  49                 const uint8_t *in_key,
  50                 unsigned int key_len);
  51 void aesni_enc(struct crypto_aes_ctx *ctx, uint8_t *dst, const uint8_t *src);
  52 void aesni_dec(struct crypto_aes_ctx *ctx, uint8_t *dst, const uint8_t *src);
  53
  54 #else /* #if defined(HAVE_AESNI_INTEL) */
  55
  56 /*
  57  * We need a dummy definition of struct crypto_aesni_ctx to allow compiles.
  58  */
  59
  60 struct crypto_aesni_ctx {
  61         int dummy;
  62 };
  63
  64 #endif /* #if defined(HAVE_AESNI_INTEL) */
  65
  66 #endif /* LIB_CRYPTO_AESNI_H */