I was not able to test it on Ubuntu because I don't have armhf hardware,
but I have just tested it on a Debian porterbox. The only difference
between Debian bookworm and sid versions of Qt is presence of this
patch.
I used this test code and complied it with qmake && make.
mitya57@harris:~/test$ cat test.pro
CONFIG += debug warn_all
QT = core network
SOURCES = test.cpp
mitya57@harris:~/test$ cat test.cpp
#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
#include <QtNetwork/QSslConfiguration>
#include <QtNetwork/QSslSocket>
int main(int argc, char **argv) {
QCoreApplication app(argc, argv);
QSslSocket s;
QSslConfiguration cfg = s.sslConfiguration();
cfg.setProtocol(QSsl::TlsV1_3OrLater);
s.setSslConfiguration(cfg);
s.connectToHostEncrypted("www.ubuntu.com", 443);
s.waitForConnected();
qDebug() << s.sessionProtocol();
return 0;
}
Without patch:
(bookworm_armhf-dchroot)mitya57@harris:~/test$ ./test
-1
With patch:
(sid_armhf-dchroot)mitya57@harris:~/test$ ./test
15
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Touch seeded packages, which is subscribed to qtbase-opensource-src in
Ubuntu.
https://bugs.launchpad.net/bugs/1981807
Title:
qt5-network openssl3 armhf does not support tls1.3
Status in qtbase-opensource-src package in Ubuntu:
Fix Released
Status in qtbase-opensource-src source package in Jammy:
Confirmed
Bug description:
lsb_release
Description: Ubuntu 22.04 LTS
Release: 22.04
libqt5network5/jammy,now 5.15.3+dfsg-2 armhf
libssl3/jammy-updates,jammy-security,now 3.0.2-0ubuntu1.6 armhf
the qt5 armhf version shipped with ubuntu jammy has a regression in
tls1.3 support (simply missing in runtime).
openssl supports tls1.3, so the underlying library works.
x86_64 is obviously not affected
the short sample applications writes -1 on armhf, 15 on x86_64 (unknown
protocol vs tls1.3)
QSslSocket* s = new QSslSocket();
QSslConfiguration cfg = s->sslConfiguration();
cfg.setProtocol(QSsl::TlsV1_3OrLater);
s->setSslConfiguration(cfg);
s->connectToHostEncrypted("tls13-enabled.server",443);
s->waitForConnected();
printf("%d\n",s->sessionProtocol());
marking it as security since the most secure tls protocol is not used
on some platforms
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https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1981807/+subscriptions
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