xts.h
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1 /**
2  * @file xts.h
3  * @brief XEX-based tweaked-codebook mode with ciphertext stealing (XTS)
4  *
5  * @section License
6  *
7  * SPDX-License-Identifier: GPL-2.0-or-later
8  *
9  * Copyright (C) 2010-2024 Oryx Embedded SARL. All rights reserved.
10  *
11  * This file is part of CycloneCRYPTO Open.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License
15  * as published by the Free Software Foundation; either version 2
16  * of the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software Foundation,
25  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
26  *
27  * @author Oryx Embedded SARL (www.oryx-embedded.com)
28  * @version 2.4.0
29  **/
30 
31 #ifndef _XTS_H
32 #define _XTS_H
33 
34 //Dependencies
35 #include "core/crypto.h"
37 
38 //C++ guard
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
42 
43 
44 /**
45  * @brief XTS context
46  **/
47 
48 typedef struct
49 {
53 } XtsContext;
54 
55 
56 //XTS related functions
57 error_t xtsInit(XtsContext *context, const CipherAlgo *cipherAlgo,
58  const void *key, size_t keyLen);
59 
60 error_t xtsEncrypt(XtsContext *context, const uint8_t *i, const uint8_t *p,
61  uint8_t *c, size_t length);
62 
63 error_t xtsDecrypt(XtsContext *context, const uint8_t *i, const uint8_t *c,
64  uint8_t *p, size_t length);
65 
66 void xtsMul(uint8_t *x, const uint8_t *a);
67 void xtsXorBlock(uint8_t *x, const uint8_t *a, const uint8_t *b);
68 
69 //C++ guard
70 #ifdef __cplusplus
71 }
72 #endif
73 
74 #endif
Collection of AEAD algorithms.
General definitions for cryptographic algorithms.
error_t
Error codes.
Definition: error.h:43
uint8_t x
Definition: lldp_ext_med.h:211
uint8_t b
Definition: nbns_common.h:104
uint8_t c
Definition: ndp.h:514
uint8_t p
Definition: ndp.h:300
uint8_t a
Definition: ndp.h:411
Common interface for encryption algorithms.
Definition: crypto.h:1036
XTS context.
Definition: xts.h:49
CipherContext cipherContext2
Definition: xts.h:52
const CipherAlgo * cipherAlgo
Definition: xts.h:50
CipherContext cipherContext1
Definition: xts.h:51
uint8_t length
Definition: tcp.h:368
Generic cipher algorithm context.
error_t xtsDecrypt(XtsContext *context, const uint8_t *i, const uint8_t *c, uint8_t *p, size_t length)
Decrypt a data unit using XTS.
Definition: xts.c:171
void xtsXorBlock(uint8_t *x, const uint8_t *a, const uint8_t *b)
XOR operation.
Definition: xts.c:282
error_t xtsEncrypt(XtsContext *context, const uint8_t *i, const uint8_t *p, uint8_t *c, size_t length)
Encrypt a data unit using XTS.
Definition: xts.c:106
error_t xtsInit(XtsContext *context, const CipherAlgo *cipherAlgo, const void *key, size_t keyLen)
Initialize XTS context.
Definition: xts.c:57
void xtsMul(uint8_t *x, const uint8_t *a)
Multiplication by x in GF(2^128)
Definition: xts.c:252