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8048b5e47c
Modern CPUs have special instructions to accelerate computing SHA hashes. The Qt QCryptographicHash code is standard C, so not taking advantage of those though. Outsource the hashing to OpenSSL that does. Shaves off some seconds during verification stage.
37 lines
953 B
C++
37 lines
953 B
C++
/*
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* Use OpenSSL for hashing as their code is more optimized than Qt's
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*
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* SPDX-License-Identifier: Apache-2.0
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* Copyright (C) 2020 Raspberry Pi (Trading) Limited
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*/
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#include "acceleratedcryptographichash.h"
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AcceleratedCryptographicHash::AcceleratedCryptographicHash(QCryptographicHash::Algorithm method)
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{
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if (method != QCryptographicHash::Sha256)
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throw std::runtime_error("Only sha256 implemented");
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SHA256_Init(&_sha256);
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}
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AcceleratedCryptographicHash::~AcceleratedCryptographicHash()
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{
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}
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void AcceleratedCryptographicHash::addData(const char *data, int length)
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{
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SHA256_Update(&_sha256, data, length);
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}
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void AcceleratedCryptographicHash::addData(const QByteArray &data)
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{
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addData(data.constData(), data.size());
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}
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QByteArray AcceleratedCryptographicHash::result()
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{
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unsigned char binhash[SHA256_DIGEST_LENGTH];
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SHA256_Final(binhash, &_sha256);
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return QByteArray((char *) binhash, sizeof binhash);
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}
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