Классы Secure Sockets Layer (SSL).
See the General Qt Requirements page for information about the versions of OpenSSL that are known to work with Qt.
Note: Due to import and export restrictions in some parts of the world, we are unable to supply the OpenSSL Toolkit with Qt packages. Developers wishing to use SSL communication in their deployed applications should either ensure that their users have the appropriate libraries installed, or they should consult a suitably qualified legal professional to ensure that applications using code from the OpenSSL project are correctly certified for import and export in relevant regions of the world.
When the QtNetwork module is built with SSL support, the library is linked against OpenSSL in a way that requires OpenSSL license compliance. Developers using Qt licensed under the GNU General Public License (either version 2 or version 3) can redistribute their applications and libraries under the terms of the GPL or any of the licenses listed in the Trolltech GPL Exception Version 1.2 and may additionally invoke the Additional Exception for OpenSSL to redistribute code which uses OpenSSL. However, please note that this exception only grants additional permissions with respect to the license under which Qt is provided; it does not exempt developers from the import/export restrictions mentioned above.
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