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      1 /* Copyright (c) 2017, Google Inc.
      2  *
      3  * Permission to use, copy, modify, and/or distribute this software for any
      4  * purpose with or without fee is hereby granted, provided that the above
      5  * copyright notice and this permission notice appear in all copies.
      6  *
      7  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      8  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      9  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     10  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     11  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
     12  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
     13  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
     14 
     15 #ifndef OPENSSL_HEADER_AES_INTERNAL_H
     16 #define OPENSSL_HEADER_AES_INTERNAL_H
     17 
     18 #include <stdlib.h>
     19 
     20 #include <openssl/cpu.h>
     21 
     22 #if defined(__cplusplus)
     23 extern "C" {
     24 #endif
     25 
     26 
     27 #if !defined(OPENSSL_NO_ASM) && (defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64))
     28 #define HWAES
     29 
     30 static int hwaes_capable(void) {
     31   return CRYPTO_is_ARMv8_AES_capable();
     32 }
     33 #endif  // !NO_ASM && (AES || AARCH64)
     34 
     35 #if !defined(OPENSSL_NO_ASM) && defined(OPENSSL_PPC64LE)
     36 #define HWAES
     37 
     38 static int hwaes_capable(void) {
     39   return CRYPTO_is_PPC64LE_vcrypto_capable();
     40 }
     41 #endif  // !NO_ASM && PPC64LE
     42 
     43 
     44 #if defined(HWAES)
     45 
     46 int aes_hw_set_encrypt_key(const uint8_t *user_key, const int bits,
     47                            AES_KEY *key);
     48 int aes_hw_set_decrypt_key(const uint8_t *user_key, const int bits,
     49                            AES_KEY *key);
     50 void aes_hw_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
     51 void aes_hw_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
     52 void aes_hw_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
     53                         const AES_KEY *key, uint8_t *ivec, const int enc);
     54 void aes_hw_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out, size_t len,
     55                                  const AES_KEY *key, const uint8_t ivec[16]);
     56 
     57 #else
     58 
     59 // If HWAES isn't defined then we provide dummy functions for each of the hwaes
     60 // functions.
     61 static int hwaes_capable(void) { return 0; }
     62 
     63 static int aes_hw_set_encrypt_key(const uint8_t *user_key, int bits,
     64                                   AES_KEY *key) {
     65   abort();
     66 }
     67 
     68 static int aes_hw_set_decrypt_key(const uint8_t *user_key, int bits,
     69                                   AES_KEY *key) {
     70   abort();
     71 }
     72 
     73 static void aes_hw_encrypt(const uint8_t *in, uint8_t *out,
     74                            const AES_KEY *key) {
     75   abort();
     76 }
     77 
     78 static void aes_hw_decrypt(const uint8_t *in, uint8_t *out,
     79                            const AES_KEY *key) {
     80   abort();
     81 }
     82 
     83 static void aes_hw_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
     84                                const AES_KEY *key, uint8_t *ivec, int enc) {
     85   abort();
     86 }
     87 
     88 static void aes_hw_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out,
     89                                         size_t len, const AES_KEY *key,
     90                                         const uint8_t ivec[16]) {
     91   abort();
     92 }
     93 
     94 #endif  // !HWAES
     95 
     96 #if defined(__cplusplus)
     97 }  // extern C
     98 #endif
     99 
    100 #endif  // OPENSSL_HEADER_AES_INTERNAL_H
    101