1 /*
2 * Copyright 2019-2024 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 GCM mode */
18
19 #include "cipher_aes_gcm.h"
20 #include "prov/implementations.h"
21 #include "prov/providercommon.h"
22
aes_gcm_newctx(void * provctx,size_t keybits)23 static void *aes_gcm_newctx(void *provctx, size_t keybits)
24 {
25 PROV_AES_GCM_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_gcm_initctx(provctx, &ctx->base, keybits,
33 ossl_prov_aes_hw_gcm(keybits));
34 return ctx;
35 }
36
aes_gcm_dupctx(void * provctx)37 static void *aes_gcm_dupctx(void *provctx)
38 {
39 PROV_AES_GCM_CTX *ctx = provctx;
40 PROV_AES_GCM_CTX *dctx = NULL;
41
42 if (ctx == NULL)
43 return NULL;
44
45 dctx = OPENSSL_memdup(ctx, sizeof(*ctx));
46 if (dctx != NULL && dctx->base.gcm.key != NULL)
47 dctx->base.gcm.key = &dctx->ks.ks;
48
49 return dctx;
50 }
51
52 static OSSL_FUNC_cipher_freectx_fn aes_gcm_freectx;
aes_gcm_freectx(void * vctx)53 static void aes_gcm_freectx(void *vctx)
54 {
55 PROV_AES_GCM_CTX *ctx = (PROV_AES_GCM_CTX *)vctx;
56
57 OPENSSL_clear_free(ctx, sizeof(*ctx));
58 }
59
60 /* ossl_aes128gcm_functions */
61 IMPLEMENT_aead_cipher(aes, gcm, GCM, AEAD_FLAGS, 128, 8, 96);
62 /* ossl_aes192gcm_functions */
63 IMPLEMENT_aead_cipher(aes, gcm, GCM, AEAD_FLAGS, 192, 8, 96);
64 /* ossl_aes256gcm_functions */
65 IMPLEMENT_aead_cipher(aes, gcm, GCM, AEAD_FLAGS, 256, 8, 96);
66