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// Copyright 2024 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.
#include <Arduino.h>
#if ESP_IDF_VERSION_MAJOR < 5
#ifndef SHA1Builder_h
#define SHA1Builder_h
#include <Stream.h>
#include <WString.h>
#define SHA1_HASH_SIZE 20
class SHA1Builder {
private:
uint32_t total[2]; /* number of bytes processed */
uint32_t state[5]; /* intermediate digest state */
unsigned char buffer[64]; /* data block being processed */
uint8_t hash[SHA1_HASH_SIZE]; /* SHA-1 result */
void process(const uint8_t *data);
public:
void begin();
void add(const uint8_t *data, size_t len);
void calculate();
void getBytes(uint8_t *output);
};
#endif // SHA1Builder_h
#endif // ESP_IDF_VERSION_MAJOR < 5
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