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 /* 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 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 37 static OSSL_FUNC_cipher_freectx_fn aes_gcm_freectx; 38 static void aes_gcm_freectx(void *vctx) 39 { 40 PROV_AES_GCM_CTX *ctx = (PROV_AES_GCM_CTX *)vctx; 41 42 OPENSSL_clear_free(ctx, sizeof(*ctx)); 43 } 44 45 /* ossl_aes128gcm_functions */ 46 IMPLEMENT_aead_cipher(aes, gcm, GCM, AEAD_FLAGS, 128, 8, 96); 47 /* ossl_aes192gcm_functions */ 48 IMPLEMENT_aead_cipher(aes, gcm, GCM, AEAD_FLAGS, 192, 8, 96); 49 /* ossl_aes256gcm_functions */ 50 IMPLEMENT_aead_cipher(aes, gcm, GCM, AEAD_FLAGS, 256, 8, 96); 51