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 CCM mode */ 18 19 #include "cipher_aes_ccm.h" 20 #include "prov/implementations.h" 21 #include "prov/providercommon.h" 22 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 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 (ctx == NULL) 42 return NULL; 43 dupctx = OPENSSL_memdup(provctx, sizeof(*ctx)); 44 if (dupctx == NULL) 45 return NULL; 46 /* 47 * ossl_cm_initctx, via the ossl_prov_aes_hw_ccm functions assign a 48 * provctx->ccm.ks.ks to the ccm context key so we need to point it to 49 * the memduped copy 50 */ 51 dupctx->base.ccm_ctx.key = &dupctx->ccm.ks.ks; 52 53 return dupctx; 54 } 55 56 static OSSL_FUNC_cipher_freectx_fn aes_ccm_freectx; 57 static void aes_ccm_freectx(void *vctx) 58 { 59 PROV_AES_CCM_CTX *ctx = (PROV_AES_CCM_CTX *)vctx; 60 61 OPENSSL_clear_free(ctx, sizeof(*ctx)); 62 } 63 64 /* ossl_aes128ccm_functions */ 65 IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 128, 8, 96); 66 /* ossl_aes192ccm_functions */ 67 IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 192, 8, 96); 68 /* ossl_aes256ccm_functions */ 69 IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 256, 8, 96); 70