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);
64 #endif /* HWAES_CAPABLE */
68 stream_enc = bsaes_xts_encrypt;
69 stream_dec = bsaes_xts_decrypt;
71 #endif /* BSAES_CAPABLE */
74 XTS_SET_KEY_FN(vpaes_set_encrypt_key, vpaes_set_decrypt_key,
75 vpaes_encrypt, vpaes_decrypt, stream_enc, stream_dec);
78 #endif /* VPAES_CAPABLE */
83 XTS_SET_KEY_FN(AES_set_encrypt_key, AES_set_decrypt_key,
84 AES_encrypt, AES_decrypt, stream_enc, stream_dec);
89 static void cipher_hw_aes_xts_copyctx(PROV_CIPHER_CTX *dst,
90 const PROV_CIPHER_CTX *src)
92 PROV_AES_XTS_CTX *sctx = (PROV_AES_XTS_CTX *)src;
93 PROV_AES_XTS_CTX *dctx = (PROV_AES_XTS_CTX *)dst;
96 dctx->xts.key1 = &dctx->ks1.ks;
97 dctx->xts.key2 = &dctx->ks2.ks;
100 #if defined(AESNI_CAPABLE)
102 static int cipher_hw_aesni_xts_initkey(PROV_CIPHER_CTX *ctx,
103 const unsigned char *key, size_t keylen)
105 PROV_AES_XTS_CTX *xctx = (PROV_AES_XTS_CTX *)ctx;
107 XTS_SET_KEY_FN(aesni_set_encrypt_key, aesni_set_decrypt_key,
108 aesni_encrypt, aesni_decrypt,
109 aesni_xts_encrypt, aesni_xts_decrypt);
113 # define PROV_CIPHER_HW_declare_xts() \
114 static const PROV_CIPHER_HW aesni_xts = { \
115 cipher_hw_aesni_xts_initkey, \
117 cipher_hw_aes_xts_copyctx \
119 # define PROV_CIPHER_HW_select_xts() \
123 # elif defined(SPARC_AES_CAPABLE)
125 static int cipher_hw_aes_xts_t4_initkey(PROV_CIPHER_CTX *ctx,
126 const unsigned char *key, size_t keylen)
128 PROV_AES_XTS_CTX *xctx = (PROV_AES_XTS_CTX *)ctx;
129 OSSL_xts_stream_fn stream_enc = NULL;
130 OSSL_xts_stream_fn stream_dec = NULL;
132 /* Note: keylen is the size of 2 keys */
135 stream_enc = aes128_t4_xts_encrypt;
136 stream_dec = aes128_t4_xts_decrypt;
139 stream_enc = aes256_t4_xts_encrypt;
140 stream_dec = aes256_t4_xts_decrypt;
146 XTS_SET_KEY_FN(aes_t4_set_encrypt_key, aes_t4_set_decrypt_key,
147 aes_t4_encrypt, aes_t4_decrypt,
148 stream_enc, stream_dec);
152 # define PROV_CIPHER_HW_declare_xts() \
153 static const PROV_CIPHER_HW aes_xts_t4 = { \
154 cipher_hw_aes_xts_t4_initkey, \
156 cipher_hw_aes_xts_copyctx \
158 # define PROV_CIPHER_HW_select_xts() \
159 if (SPARC_AES_CAPABLE) \
162 /* The generic case */
163 # define PROV_CIPHER_HW_declare_xts()
164 # define PROV_CIPHER_HW_select_xts()
167 static const PROV_CIPHER_HW aes_generic_xts = {
168 cipher_hw_aes_xts_generic_initkey,
170 cipher_hw_aes_xts_copyctx
172 PROV_CIPHER_HW_declare_xts()
173 const PROV_CIPHER_HW *ossl_prov_cipher_hw_aes_xts(size_t keybits)
175 PROV_CIPHER_HW_select_xts()
176 return &aes_generic_xts;