1/*
2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10/* AES CCM mode */
11
12/*
13 * This file uses the low level AES functions (which are deprecated for
14 * non-internal use) in order to implement provider AES ciphers.
15 */
16#include "internal/deprecated.h"
17
18#include "cipher_aes_ccm.h"
19
20#define AES_HW_CCM_SET_KEY_FN(fn_set_enc_key, fn_blk, fn_ccm_enc, fn_ccm_dec)  \
21    fn_set_enc_key(key, keylen * 8, &actx->ccm.ks.ks);                         \
22    CRYPTO_ccm128_init(&ctx->ccm_ctx, ctx->m, ctx->l, &actx->ccm.ks.ks,        \
23                       (block128_f)fn_blk);                                    \
24    ctx->str = ctx->enc ? (ccm128_f)fn_ccm_enc : (ccm128_f)fn_ccm_dec;         \
25    ctx->key_set = 1;
26
27static int ccm_generic_aes_initkey(PROV_CCM_CTX *ctx, const unsigned char *key,
28                                   size_t keylen)
29{
30    PROV_AES_CCM_CTX *actx = (PROV_AES_CCM_CTX *)ctx;
31
32#ifdef HWAES_CAPABLE
33    if (HWAES_CAPABLE) {
34        AES_HW_CCM_SET_KEY_FN(HWAES_set_encrypt_key, HWAES_encrypt, NULL, NULL);
35    } else
36#endif /* HWAES_CAPABLE */
37
38#ifdef VPAES_CAPABLE
39    if (VPAES_CAPABLE) {
40        AES_HW_CCM_SET_KEY_FN(vpaes_set_encrypt_key, vpaes_encrypt, NULL, NULL);
41    } else
42#endif
43    {
44        AES_HW_CCM_SET_KEY_FN(AES_set_encrypt_key, AES_encrypt, NULL, NULL)
45    }
46    return 1;
47}
48
49static const PROV_CCM_HW aes_ccm = {
50    ccm_generic_aes_initkey,
51    ossl_ccm_generic_setiv,
52    ossl_ccm_generic_setaad,
53    ossl_ccm_generic_auth_encrypt,
54    ossl_ccm_generic_auth_decrypt,
55    ossl_ccm_generic_gettag
56};
57
58#if defined(S390X_aes_128_CAPABLE)
59# include "cipher_aes_ccm_hw_s390x.inc"
60#elif defined(AESNI_CAPABLE)
61# include "cipher_aes_ccm_hw_aesni.inc"
62#elif defined(SPARC_AES_CAPABLE)
63# include "cipher_aes_ccm_hw_t4.inc"
64#else
65const PROV_CCM_HW *ossl_prov_aes_hw_ccm(size_t keybits)
66{
67    return &aes_ccm;
68}
69#endif
70