esp-idf/components/esp_rom/include/esp32s2/rom/sha.h
2020-01-22 12:14:38 +08:00

75 lines
2.1 KiB
C

/*
ROM functions for hardware SHA support.
It is not recommended to use these functions directly. If using
them from esp-idf then use the esp_sha_lock_engine() and
esp_sha_lock_memory_block() functions in hwcrypto/sha.h to ensure
exclusive access.
*/
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// 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.
#ifndef _ROM_SHA_H_
#define _ROM_SHA_H_
#include <stdint.h>
#include <stdbool.h>
#include "ets_sys.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
SHA1 = 0,
SHA2_224,
SHA2_256,
SHA2_384,
SHA2_512,
SHA2_512224,
SHA2_512256,
SHA2_512T,
SHA_TYPE_MAX
} SHA_TYPE;
typedef struct SHAContext {
bool start;
bool in_hardware; // Is this context currently in peripheral? Needs to be manually cleared if multiple SHAs are interleaved
SHA_TYPE type;
uint32_t state[16]; // For SHA1/SHA224/SHA256, used 8, other used 16
unsigned char buffer[128]; // For SHA1/SHA224/SHA256, used 64, other used 128
uint32_t total_bits[4];
} SHA_CTX;
void ets_sha_enable(void);
void ets_sha_disable(void);
ets_status_t ets_sha_init(SHA_CTX *ctx, SHA_TYPE type);
ets_status_t ets_sha_starts(SHA_CTX *ctx, uint16_t sha512_t);
void ets_sha_get_state(SHA_CTX *ctx);
void ets_sha_process(SHA_CTX *ctx, const unsigned char *input);
void ets_sha_update(SHA_CTX *ctx, const unsigned char *input, uint32_t input_bytes, bool update_ctx);
ets_status_t ets_sha_finish(SHA_CTX *ctx, unsigned char *output);
#ifdef __cplusplus
}
#endif
#endif /* _ROM_SHA_H_ */