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// Copyright 2024 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <Arduino.h>
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#if ESP_IDF_VERSION_MAJOR < 5
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#include <Stream.h>
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#include <WString.h>
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#define SHA1_HASH_SIZE 20
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class SHA1Builder {
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private:
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uint32_t total[2]; /* number of bytes processed */
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uint32_t state[5]; /* intermediate digest state */
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unsigned char buffer[64]; /* data block being processed */
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uint8_t hash[SHA1_HASH_SIZE]; /* SHA-1 result */
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void process(const uint8_t *data);
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public:
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void begin();
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void add(const uint8_t *data, size_t len);
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void calculate();
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void getBytes(uint8_t *output);
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};
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#endif // ESP_IDF_VERSION_MAJOR < 5
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