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)
23extern "C" {
24#endif
25
26
27#if !defined(OPENSSL_NO_ASM)
28
29#if defined(OPENSSL_X86_64)
30#define HWAES
31#define HWAES_ECB
32
33static int hwaes_capable(void) {
34  return (OPENSSL_ia32cap_P[1] & (1 << (57 - 32))) != 0;
35}
36#elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
37#define HWAES
38
39static int hwaes_capable(void) {
40  return CRYPTO_is_ARMv8_AES_capable();
41}
42#elif defined(OPENSSL_PPC64LE)
43#define HWAES
44
45static int hwaes_capable(void) {
46  return CRYPTO_is_PPC64LE_vcrypto_capable();
47}
48#endif
49
50#endif  // !NO_ASM
51
52
53#if defined(HWAES)
54
55int aes_hw_set_encrypt_key(const uint8_t *user_key, const int bits,
56                           AES_KEY *key);
57int aes_hw_set_decrypt_key(const uint8_t *user_key, const int bits,
58                           AES_KEY *key);
59void aes_hw_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
60void aes_hw_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
61void aes_hw_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
62                        const AES_KEY *key, uint8_t *ivec, const int enc);
63void aes_hw_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out, size_t len,
64                                 const AES_KEY *key, const uint8_t ivec[16]);
65
66#else
67
68// If HWAES isn't defined then we provide dummy functions for each of the hwaes
69// functions.
70static int hwaes_capable(void) { return 0; }
71
72static int aes_hw_set_encrypt_key(const uint8_t *user_key, int bits,
73                                  AES_KEY *key) {
74  abort();
75}
76
77static int aes_hw_set_decrypt_key(const uint8_t *user_key, int bits,
78                                  AES_KEY *key) {
79  abort();
80}
81
82static void aes_hw_encrypt(const uint8_t *in, uint8_t *out,
83                           const AES_KEY *key) {
84  abort();
85}
86
87static void aes_hw_decrypt(const uint8_t *in, uint8_t *out,
88                           const AES_KEY *key) {
89  abort();
90}
91
92static void aes_hw_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
93                               const AES_KEY *key, uint8_t *ivec, int enc) {
94  abort();
95}
96
97static void aes_hw_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out,
98                                        size_t len, const AES_KEY *key,
99                                        const uint8_t ivec[16]) {
100  abort();
101}
102
103#endif  // !HWAES
104
105
106#if defined(HWAES_ECB)
107void aes_hw_ecb_encrypt(const uint8_t *in, uint8_t *out, size_t length,
108                        const AES_KEY *key, const int enc);
109#endif
110
111#if defined(__cplusplus)
112}  // extern C
113#endif
114
115#endif  // OPENSSL_HEADER_AES_INTERNAL_H
116