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3837c202 SL |
1 | /* |
2 | * Copyright 2019 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 | #include <openssl/aes.h> | |
11 | #include "internal/ciphers/ciphercommon.h" | |
12 | ||
13 | #define OCB_MAX_TAG_LEN AES_BLOCK_SIZE | |
14 | #define OCB_MAX_DATA_LEN AES_BLOCK_SIZE | |
15 | #define OCB_MAX_AAD_LEN AES_BLOCK_SIZE | |
16 | ||
17 | typedef struct prov_aes_ocb_ctx_st { | |
18 | PROV_CIPHER_CTX base; /* Must be first */ | |
19 | union { | |
20 | OSSL_UNION_ALIGN; | |
21 | AES_KEY ks; | |
22 | } ksenc; /* AES key schedule to use for encryption/aad */ | |
23 | union { | |
24 | OSSL_UNION_ALIGN; | |
25 | AES_KEY ks; | |
26 | } ksdec; /* AES key schedule to use for decryption */ | |
27 | OCB128_CONTEXT ocb; | |
28 | unsigned int iv_state; /* set to one of IV_STATE_XXX */ | |
29 | unsigned int key_set : 1; | |
30 | size_t taglen; | |
31 | size_t data_buf_len; | |
32 | size_t aad_buf_len; | |
33 | unsigned char tag[OCB_MAX_TAG_LEN]; | |
34 | unsigned char data_buf[OCB_MAX_DATA_LEN]; /* Store partial data blocks */ | |
35 | unsigned char aad_buf[OCB_MAX_AAD_LEN]; /* Store partial AAD blocks */ | |
36 | } PROV_AES_OCB_CTX; | |
37 | ||
38 | const PROV_CIPHER_HW *PROV_CIPHER_HW_aes_ocb(size_t keybits); |