1 /*
2  *  SHA-512 implementation with hardware ESP32 support added.
3  *  Uses mbedTLS software implementation for failover when concurrent
4  *  SHA operations are in use.
5  *
6  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
7  *  Additions Copyright (C) 2016, Espressif Systems (Shanghai) PTE LTD
8  *  SPDX-License-Identifier: Apache-2.0
9  *
10  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
11  *  not use this file except in compliance with the License.
12  *  You may obtain a copy of the License at
13  *
14  *  http://www.apache.org/licenses/LICENSE-2.0
15  *
16  *  Unless required by applicable law or agreed to in writing, software
17  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
18  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19  *  See the License for the specific language governing permissions and
20  *  limitations under the License.
21  *
22  */
23 #ifndef _SHA512_ALT_H_
24 #define _SHA512_ALT_H_
25 
26 #if defined(MBEDTLS_SHA512_ALT)
27 
28 #include "hal/sha_types.h"
29 #include "soc/soc_caps.h"
30 
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34 
35 
36 #if SOC_SHA_SUPPORT_PARALLEL_ENG
37 
38 typedef enum {
39     ESP_MBEDTLS_SHA512_UNUSED, /* first block hasn't been processed yet */
40     ESP_MBEDTLS_SHA512_HARDWARE, /* using hardware SHA engine */
41     ESP_MBEDTLS_SHA512_SOFTWARE, /* using software SHA */
42 } esp_mbedtls_sha512_mode;
43 
44 /**
45  * \brief          SHA-512 context structure
46  */
47 typedef struct {
48     uint64_t total[2];          /*!< number of bytes processed  */
49     uint64_t state[8];          /*!< intermediate digest state  */
50     unsigned char buffer[128];  /*!< data block being processed */
51     int is384;                  /*!< 0 => SHA-512, else SHA-384 */
52     esp_mbedtls_sha512_mode mode;
53 } mbedtls_sha512_context;
54 
55 #elif SOC_SHA_SUPPORT_DMA || SOC_SHA_SUPPORT_RESUME
56 
57 typedef enum {
58     ESP_SHA512_STATE_INIT,
59     ESP_SHA512_STATE_IN_PROCESS
60 } esp_sha512_state;
61 
62 /**
63  * \brief          SHA-512 context structure
64  */
65 typedef struct {
66     uint64_t total[2];          /*!< number of bytes processed  */
67     uint64_t state[8];          /*!< intermediate digest state  */
68     unsigned char buffer[128];  /*!< data block being processed */
69     int first_block;
70     esp_sha_type mode;
71     uint32_t t_val;             /*!< t_val for 512/t mode */
72     esp_sha512_state sha_state;
73 } mbedtls_sha512_context;
74 
75 /**
76  * @brief Sets the specfic algorithm for SHA512
77  *
78  * @param ctx The mbedtls sha512 context
79  *
80  * @param type The mode, used for setting SHA2_512224 and SHA2_512256:
81  *
82  */
83 void esp_sha512_set_mode(mbedtls_sha512_context *ctx, esp_sha_type type);
84 
85 /* For SHA512/t mode the intial hash value will depend on t */
86 void esp_sha512_set_t( mbedtls_sha512_context *ctx, uint16_t t_val);
87 
88 
89 #endif
90 
91 #endif
92 
93 #ifdef __cplusplus
94 }
95 #endif
96 
97 #endif
98