2 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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
10 #include <openssl/aes.h>
11 #include "prov/ciphercommon.h"
12 #include "crypto/aes_platform.h"
14 #define OCB_MAX_TAG_LEN AES_BLOCK_SIZE
15 #define OCB_MAX_DATA_LEN AES_BLOCK_SIZE
16 #define OCB_MAX_AAD_LEN AES_BLOCK_SIZE
18 typedef struct prov_aes_ocb_ctx_st {
19 PROV_CIPHER_CTX base; /* Must be first */
23 } ksenc; /* AES key schedule to use for encryption/aad */
27 } ksdec; /* AES key schedule to use for decryption */
29 unsigned int iv_state; /* set to one of IV_STATE_XXX */
30 unsigned int key_set : 1;
34 unsigned char tag[OCB_MAX_TAG_LEN];
35 unsigned char data_buf[OCB_MAX_DATA_LEN]; /* Store partial data blocks */
36 unsigned char aad_buf[OCB_MAX_AAD_LEN]; /* Store partial AAD blocks */
39 const PROV_CIPHER_HW *PROV_CIPHER_HW_aes_ocb(size_t keybits);