90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
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// Copyright 2025 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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#ifndef SHA3Builder_h
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#define SHA3Builder_h
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#include <WString.h>
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#include <Stream.h>
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#include "HashBuilder.h"
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// SHA3 constants
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#define SHA3_224_HASH_SIZE 28
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#define SHA3_256_HASH_SIZE 32
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#define SHA3_384_HASH_SIZE 48
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#define SHA3_512_HASH_SIZE 64
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#define SHA3_224_RATE 144
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#define SHA3_256_RATE 136
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#define SHA3_384_RATE 104
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#define SHA3_512_RATE 72
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#define SHA3_STATE_SIZE 200 // 1600 bits = 200 bytes
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class SHA3Builder : public HashBuilder {
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protected:
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uint64_t state[25]; // SHA3 state (1600 bits)
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uint8_t buffer[200]; // Input buffer
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size_t rate; // Rate (block size)
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size_t hash_size; // Output hash size
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size_t buffer_size; // Current buffer size
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bool finalized; // Whether hash has been finalized
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uint8_t hash[64]; // Hash result
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void keccak_f(uint64_t state[25]);
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void process_block(const uint8_t *data);
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void pad();
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public:
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using HashBuilder::add;
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SHA3Builder(size_t hash_size = SHA3_256_HASH_SIZE);
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virtual ~SHA3Builder() {}
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void begin() override;
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void add(const uint8_t *data, size_t len) override;
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bool addStream(Stream &stream, const size_t maxLen) override;
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void calculate() override;
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void getBytes(uint8_t *output) override;
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void getChars(char *output) override;
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String toString() override;
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size_t getHashSize() const override {
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return hash_size;
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}
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};
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class SHA3_224Builder : public SHA3Builder {
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public:
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SHA3_224Builder() : SHA3Builder(SHA3_224_HASH_SIZE) {}
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};
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class SHA3_256Builder : public SHA3Builder {
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public:
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SHA3_256Builder() : SHA3Builder(SHA3_256_HASH_SIZE) {}
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};
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class SHA3_384Builder : public SHA3Builder {
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public:
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SHA3_384Builder() : SHA3Builder(SHA3_384_HASH_SIZE) {}
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};
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class SHA3_512Builder : public SHA3Builder {
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public:
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SHA3_512Builder() : SHA3Builder(SHA3_512_HASH_SIZE) {}
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};
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#endif
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