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QMessageAuthenticationCode: apply the QCryptographicHash::hash() optimization

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... of creating a Private instead of the public class on the stack.

This avoids its memory-allocation, as well as the overhead of the mutex
in finalize().

Task-number: QTBUG-111347
Change-Id: I4d144fcfadc0b8c9ba78d395ff7279b2d5d7b050
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
(cherry picked from commit d32d2137b7d513f38450d3a5e07a997c3bc90aa1)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Marc Mutz 2023-02-21 09:15:45 +01:00 committed by Qt Cherry-pick Bot
parent 2f7e6b3448
commit 9a289b7271
1 changed files with 6 additions and 4 deletions
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10
src/corelib/tools/qmessageauthenticationcode.cpp
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@ -257,10 +257,12 @@ void QMessageAuthenticationCodePrivate::finalizeUnchecked()
QByteArray QMessageAuthenticationCode::hash(const QByteArray &message, const QByteArray &key, QByteArray QMessageAuthenticationCode::hash(const QByteArray &message, const QByteArray &key,
QCryptographicHash::Algorithm method) QCryptographicHash::Algorithm method)
{ {
QMessageAuthenticationCode mac(method); QMessageAuthenticationCodePrivate mac(method);
mac.setKey(key); mac.key = key;
mac.addData(message); mac.initMessageHash();
return mac.result(); mac.messageHash.addData(message);
mac.finalizeUnchecked();
return mac.result;
} }
QT_END_NAMESPACE QT_END_NAMESPACE