2 * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * This file uses the low level AES functions (which are deprecated for
12 * non-internal use) in order to implement provider AES ciphers.
14 #include "internal/deprecated.h"
16 #include "cipher_aes_xts.h"
18 #define XTS_SET_KEY_FN(fn_set_enc_key, fn_set_dec_key, \
19 fn_block_enc, fn_block_dec, \
20 fn_stream_enc, fn_stream_dec) { \
21 size_t bytes = keylen / 2; \
22 size_t bits = bytes * 8; \
25 fn_set_enc_key(key, bits, &xctx->ks1.ks); \
26 xctx->xts.block1 = (block128_f)fn_block_enc; \
28 fn_set_dec_key(key, bits, &xctx->ks1.ks); \
29 xctx->xts.block1 = (block128_f)fn_block_dec; \
31 fn_set_enc_key(key + bytes, bits, &xctx->ks2.ks); \
32 xctx->xts.block2 = (block128_f)fn_block_enc; \
33 xctx->xts.key1 = &xctx->ks1; \
34 xctx->xts.key2 = &xctx->ks2; \
35 xctx->stream = ctx->enc ? fn_stream_enc : fn_stream_dec; \
38 static int cipher_hw_aes_xts_generic_initkey(PROV_CIPHER_CTX *ctx,
39 const unsigned char *key,
42 PROV_AES_XTS_CTX *xctx = (PROV_AES_XTS_CTX *)ctx;
43 OSSL_xts_stream_fn stream_enc = NULL;
44 OSSL_xts_stream_fn stream_dec = NULL;
47 stream_enc = AES_xts_encrypt;
48 stream_dec = AES_xts_decrypt;
49 #endif /* AES_XTS_ASM */
53 # ifdef HWAES_xts_encrypt
54 stream_enc = HWAES_xts_encrypt;
55 # endif /* HWAES_xts_encrypt */
56 # ifdef HWAES_xts_decrypt
57 stream_dec = HWAES_xts_decrypt;
58 # endif /* HWAES_xts_decrypt */
59 XTS_SET_KEY_FN(HWAES_set_encrypt_key, HWAES_set_decrypt_key,
60 HWAES_encrypt, HWAES_decrypt,
61 stream_enc, stream_dec);
63 #endif /* HWAES_CAPABLE */
67 stream_enc = bsaes_xts_encrypt;
68 stream_dec = bsaes_xts_decrypt;
70 #endif /* BSAES_CAPABLE */
73 XTS_SET_KEY_FN(vpaes_set_encrypt_key, vpaes_set_decrypt_key,
74 vpaes_encrypt, vpaes_decrypt, stream_enc, stream_dec);
77 #endif /* VPAES_CAPABLE */
82 XTS_SET_KEY_FN(AES_set_encrypt_key, AES_set_decrypt_key,
83 AES_encrypt, AES_decrypt, stream_enc, stream_dec);
88 static void cipher_hw_aes_xts_copyctx(PROV_CIPHER_CTX *dst,
89 const PROV_CIPHER_CTX *src)
91 PROV_AES_XTS_CTX *sctx = (PROV_AES_XTS_CTX *)src;
92 PROV_AES_XTS_CTX *dctx = (PROV_AES_XTS_CTX *)dst;
95 dctx->xts.key1 = &dctx->ks1.ks;
96 dctx->xts.key2 = &dctx->ks2.ks;
99 #if defined(AESNI_CAPABLE)
101 static int cipher_hw_aesni_xts_initkey(PROV_CIPHER_CTX *ctx,
102 const unsigned char *key, size_t keylen)
104 PROV_AES_XTS_CTX *xctx = (PROV_AES_XTS_CTX *)ctx;
106 XTS_SET_KEY_FN(aesni_set_encrypt_key, aesni_set_decrypt_key,
107 aesni_encrypt, aesni_decrypt,
108 aesni_xts_encrypt, aesni_xts_decrypt);
112 # define PROV_CIPHER_HW_declare_xts() \
113 static const PROV_CIPHER_HW aesni_xts = { \
114 cipher_hw_aesni_xts_initkey, \
116 cipher_hw_aes_xts_copyctx \
118 # define PROV_CIPHER_HW_select_xts() \
122 # elif defined(SPARC_AES_CAPABLE)
124 static int cipher_hw_aes_xts_t4_initkey(PROV_CIPHER_CTX *ctx,
125 const unsigned char *key, size_t keylen)
127 PROV_AES_XTS_CTX *xctx = (PROV_AES_XTS_CTX *)ctx;
128 OSSL_xts_stream_fn stream_enc = NULL;
129 OSSL_xts_stream_fn stream_dec = NULL;
131 /* Note: keylen is the size of 2 keys */
134 stream_enc = aes128_t4_xts_encrypt;
135 stream_dec = aes128_t4_xts_decrypt;
138 stream_enc = aes256_t4_xts_encrypt;
139 stream_dec = aes256_t4_xts_decrypt;
145 XTS_SET_KEY_FN(aes_t4_set_encrypt_key, aes_t4_set_decrypt_key,
146 aes_t4_encrypt, aes_t4_decrypt,
147 stream_enc, stream_dec);
151 # define PROV_CIPHER_HW_declare_xts() \
152 static const PROV_CIPHER_HW aes_xts_t4 = { \
153 cipher_hw_aes_xts_t4_initkey, \
155 cipher_hw_aes_xts_copyctx \
157 # define PROV_CIPHER_HW_select_xts() \
158 if (SPARC_AES_CAPABLE) \
161 /* The generic case */
162 # define PROV_CIPHER_HW_declare_xts()
163 # define PROV_CIPHER_HW_select_xts()
166 static const PROV_CIPHER_HW aes_generic_xts = {
167 cipher_hw_aes_xts_generic_initkey,
169 cipher_hw_aes_xts_copyctx
171 PROV_CIPHER_HW_declare_xts()
172 const PROV_CIPHER_HW *PROV_CIPHER_HW_aes_xts(size_t keybits)
174 PROV_CIPHER_HW_select_xts()
175 return &aes_generic_xts;