1 /*
2 * Copyright 2019-2023 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 /*
11 * AES low level APIs are deprecated for public use, but still ok for internal
12 * use where we're using them to implement the higher level EVP interface, as is
13 * the case here.
14 */
15 #include "internal/deprecated.h"
16
17 /* Dispatch functions for AES CCM mode */
18
19 #include "cipher_aes_ccm.h"
20 #include "prov/implementations.h"
21 #include "prov/providercommon.h"
22
aes_ccm_newctx(void * provctx,size_t keybits)23 static void *aes_ccm_newctx(void *provctx, size_t keybits)
24 {
25 PROV_AES_CCM_CTX *ctx;
26
27 if (!ossl_prov_is_running())
28 return NULL;
29
30 ctx = OPENSSL_zalloc(sizeof(*ctx));
31 if (ctx != NULL)
32 ossl_ccm_initctx(&ctx->base, keybits, ossl_prov_aes_hw_ccm(keybits));
33 return ctx;
34 }
35
aes_ccm_dupctx(void * provctx)36 static void *aes_ccm_dupctx(void *provctx)
37 {
38 PROV_AES_CCM_CTX *ctx = provctx;
39 PROV_AES_CCM_CTX *dupctx = NULL;
40
41 if (!ossl_prov_is_running())
42 return NULL;
43
44 if (ctx == NULL)
45 return NULL;
46 dupctx = OPENSSL_memdup(provctx, sizeof(*ctx));
47 if (dupctx == NULL)
48 return NULL;
49 /*
50 * ossl_cm_initctx, via the ossl_prov_aes_hw_ccm functions assign a
51 * provctx->ccm.ks.ks to the ccm context key so we need to point it to
52 * the memduped copy
53 */
54 dupctx->base.ccm_ctx.key = &dupctx->ccm.ks.ks;
55
56 return dupctx;
57 }
58
59 static OSSL_FUNC_cipher_freectx_fn aes_ccm_freectx;
aes_ccm_freectx(void * vctx)60 static void aes_ccm_freectx(void *vctx)
61 {
62 PROV_AES_CCM_CTX *ctx = (PROV_AES_CCM_CTX *)vctx;
63
64 OPENSSL_clear_free(ctx, sizeof(*ctx));
65 }
66
67 /* ossl_aes128ccm_functions */
68 IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 128, 8, 96);
69 /* ossl_aes192ccm_functions */
70 IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 192, 8, 96);
71 /* ossl_aes256ccm_functions */
72 IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 256, 8, 96);
73
