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511a8d406e
There are two variants of ChaCha20 in use. The original one uses a 64-bit nonce and a 64-bit block counter, while the one used in RFC8439 uses a 96-bit nonce and 32-bit block counter. This commit changes the interface to use the 96/32 split (but automatically incrementing the first 32-bit part of the nonce when the 32-bit block counter overflows, so to retain compatibility with >256 GiB output). Simultaneously, also merge the SetIV and Seek64 functions, as we almost always call both anyway. Co-authored-by: dhruv <856960+dhruv@users.noreply.github.com>
43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
// Copyright (c) 2019-2022 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <bench/bench.h>
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#include <crypto/chacha20.h>
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/* Number of bytes to process per iteration */
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static const uint64_t BUFFER_SIZE_TINY = 64;
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static const uint64_t BUFFER_SIZE_SMALL = 256;
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static const uint64_t BUFFER_SIZE_LARGE = 1024*1024;
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static void CHACHA20(benchmark::Bench& bench, size_t buffersize)
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{
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std::vector<uint8_t> key(32,0);
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ChaCha20 ctx(key.data());
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ctx.Seek64({0, 0}, 0);
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std::vector<uint8_t> in(buffersize,0);
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std::vector<uint8_t> out(buffersize,0);
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bench.batch(in.size()).unit("byte").run([&] {
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ctx.Crypt(in.data(), out.data(), in.size());
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});
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}
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static void CHACHA20_64BYTES(benchmark::Bench& bench)
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{
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CHACHA20(bench, BUFFER_SIZE_TINY);
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}
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static void CHACHA20_256BYTES(benchmark::Bench& bench)
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{
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CHACHA20(bench, BUFFER_SIZE_SMALL);
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}
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static void CHACHA20_1MB(benchmark::Bench& bench)
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{
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CHACHA20(bench, BUFFER_SIZE_LARGE);
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}
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BENCHMARK(CHACHA20_64BYTES, benchmark::PriorityLevel::HIGH);
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BENCHMARK(CHACHA20_256BYTES, benchmark::PriorityLevel::HIGH);
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BENCHMARK(CHACHA20_1MB, benchmark::PriorityLevel::HIGH);
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