1 /*
2 * SHA-1 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 _SHA1_ALT_H_
24 #define _SHA1_ALT_H_
25
26 #if defined(MBEDTLS_SHA1_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 #if SOC_SHA_SUPPORT_PARALLEL_ENG
36
37 typedef enum {
38 ESP_MBEDTLS_SHA1_UNUSED, /* first block hasn't been processed yet */
39 ESP_MBEDTLS_SHA1_HARDWARE, /* using hardware SHA engine */
40 ESP_MBEDTLS_SHA1_SOFTWARE, /* using software SHA */
41 } esp_mbedtls_sha1_mode;
42
43 /**
44 * \brief SHA-1 context structure
45 */
46 typedef struct {
47 uint32_t total[2]; /*!< number of bytes processed */
48 uint32_t state[5]; /*!< intermediate digest state */
49 unsigned char buffer[64]; /*!< data block being processed */
50 esp_mbedtls_sha1_mode mode;
51 } mbedtls_sha1_context;
52
53 /**
54 * \brief Set the SHA-1 mode for a mbedtls_sha1_context.
55 *
56 * \param ctx The SHA-1 context structure.
57 * \param mode The SHA-1 mode to be set. It can be one of the following:
58 * - ESP_MBEDTLS_SHA1_UNUSED: Indicates that the first block hasn't been processed yet.
59 * - ESP_MBEDTLS_SHA1_HARDWARE: Specifies the use of hardware SHA engine for SHA-1 calculations.
60 * - ESP_MBEDTLS_SHA1_SOFTWARE: Specifies the use of software-based SHA-1 calculations.
61 *
62 * \return None.
63 */
esp_mbedtls_set_sha1_mode(mbedtls_sha1_context * ctx,esp_mbedtls_sha1_mode mode)64 static inline void esp_mbedtls_set_sha1_mode(mbedtls_sha1_context *ctx, esp_mbedtls_sha1_mode mode)
65 {
66 if (ctx) {
67 ctx->mode = mode;
68 }
69 }
70
71 #elif SOC_SHA_SUPPORT_DMA || SOC_SHA_SUPPORT_RESUME
72
73 typedef enum {
74 ESP_SHA1_STATE_INIT,
75 ESP_SHA1_STATE_IN_PROCESS
76 } esp_sha1_state;
77
78 /**
79 * \brief SHA-1 context structure
80 */
81 typedef struct {
82 uint32_t total[2]; /*!< number of bytes processed */
83 uint32_t state[5]; /*!< intermediate digest state */
84 unsigned char buffer[64]; /*!< data block being processed */
85 int first_block; /*!< if first then true else false */
86 esp_sha_type mode;
87 esp_sha1_state sha_state;
88 } mbedtls_sha1_context;
89
90 #endif
91
92 #endif
93
94 #ifdef __cplusplus
95 }
96 #endif
97
98 #endif
99
