1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/**
******************************************************************************
* @file chacha.h
* @author MCD Application Team
* @version V3.0.0
* @date 05-June-2015
* @brief ChaCha20 header file
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2015 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Image SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __CHACHA_H__
#define __CHACHA_H__
#ifdef __cplusplus
extern "C"
{
#endif
/** @addtogroup CHACHA
* @{
*/
/* Includes ------------------------------------------------------------------*/
#include <stdint.h>
/* Exported types ------------------------------------------------------------*/
typedef struct
{
uint32_t mContextId; /*!< Unique ID of this context. \b Not \b used in current implementation. */
SKflags_et mFlags; /*!< 32 bit mFlags, used to perform keyschedule and future use */
const uint8_t *pmKey; /*!< Pointer to original Key buffer */
const uint8_t *pmIv; /*!< Pointer to original Initialization Vector buffer */
int32_t mIvSize; /*!< Size of the Initialization Vector in bytes */
int32_t mKeySize; /*!< Key length in bytes */
uint64_t mCounter; /*!< Value for counter, will allow to process not contiguous data. Set flag E_SK_SET_COUNTER to use it, otherwise it's ignored */
uint32_t amState[16]; /*!< ChaCha Internal State */
}
CHACHActx_stt; /*!< Chacha context structure */
/* Exported constants --------------------------------------------------------*/
#define CRL_CHACHA128_KEY 16 /*!< Number of bytes (uint8_t) necessary to store a ChaCha key of 128 bits. */
#define CRL_CHACHA256_KEY 32 /*!< Number of bytes (uint8_t) necessary to store a Chacha key of 256 bits. */
#define CRL_CHACHA_NONCE 8 /*!< Number of bytes (uint8_t) necessary to store a Chacha Nonce of 64 bits. */
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
int32_t CHACHA_Encrypt_Init(CHACHActx_stt *P_pCHACHActx, const uint8_t *P_pKey, const uint8_t *P_pIv);
int32_t CHACHA_Encrypt_Append(CHACHActx_stt *P_pCHACHActx,
const uint8_t *P_pInputBuffer,
int32_t P_inputSize,
uint8_t *P_pOutputBuffer,
int32_t *P_pOutputSize);
int32_t CHACHA_Encrypt_Finish(CHACHActx_stt *P_pCHACHActx,
uint8_t *P_pOutputBuffer,
int32_t *P_pOutputSize);
int32_t CHACHA_Decrypt_Init(CHACHActx_stt *P_pCHACHActx, const uint8_t *P_pKey, const uint8_t *P_pIv);
int32_t CHACHA_Decrypt_Append(CHACHActx_stt *P_pCHACHActx,
const uint8_t *P_pInputBuffer,
int32_t P_inputSize,
uint8_t *P_pOutputBuffer,
int32_t *P_pOutputSize);
int32_t CHACHA_Decrypt_Finish(CHACHActx_stt *P_pCHACHActx,
uint8_t *P_pOutputBuffer,
int32_t *P_pOutputSize);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* __CHACHA_H__ */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|
