QNetwork problems with SSL, any fix or alternatives?

Leon

Hi.

I am revisiting an old application i was developing, and it seems that QNetwork is broken (code used to work). Now i get a lot of SSL problems. I only need to download the html code of https webpages and also be able fetch images..

I am not sure whether i should try and fix these problems or search for an alternative lightweight library that i could include and would work with both Linux and WIndows, considering GNU Licence 3

Windows:
To fix i had to add libcrypto-1_1-x64.dll and libssl-1_1-x64.dll on the debug folder

Ubuntu 22:04:
Qt 5.11.3 (doesn't find OpenSSL installed)

qt.network.ssl: QSslSocket: cannot resolve CRYPTO_num_locks
qt.network.ssl: QSslSocket: cannot resolve CRYPTO_set_id_callback
qt.network.ssl: QSslSocket: cannot resolve CRYPTO_set_locking_callback
qt.network.ssl: QSslSocket: cannot resolve ERR_free_strings
qt.network.ssl: QSslSocket: cannot resolve EVP_CIPHER_CTX_cleanup
qt.network.ssl: QSslSocket: cannot resolve EVP_CIPHER_CTX_init
qt.network.ssl: QSslSocket: cannot resolve sk_new_null
qt.network.ssl: QSslSocket: cannot resolve sk_push
qt.network.ssl: QSslSocket: cannot resolve sk_free
qt.network.ssl: QSslSocket: cannot resolve sk_num
qt.network.ssl: QSslSocket: cannot resolve sk_pop_free
qt.network.ssl: QSslSocket: cannot resolve sk_value
qt.network.ssl: QSslSocket: cannot resolve SSL_library_init
qt.network.ssl: QSslSocket: cannot resolve SSL_load_error_strings
qt.network.ssl: QSslSocket: cannot resolve SSL_get_ex_new_index
qt.network.ssl: QSslSocket: cannot resolve SSLv3_client_method
qt.network.ssl: QSslSocket: cannot resolve SSLv23_client_method
qt.network.ssl: QSslSocket: cannot resolve SSLv3_server_method
qt.network.ssl: QSslSocket: cannot resolve SSLv23_server_method
qt.network.ssl: QSslSocket: cannot resolve X509_STORE_CTX_get_chain
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_add_all_algorithms_noconf
qt.network.ssl: QSslSocket: cannot resolve OPENSSL_add_all_algorithms_conf
qt.network.ssl: QSslSocket: cannot resolve SSLeay
qt.network.ssl: Incompatible version of OpenSSL

Qt 5.15.2 (finds OpenSSL 3.0.2 installed)

qt.network.ssl: QSslSocket: cannot resolve EVP_PKEY_base_id
qt.network.ssl: QSslSocket: cannot resolve SSL_get_peer_certificate

SGaist

Hi,

5.11 was released before OpenSSL 3 even existed.

AFAIR, the support for OpenSSL 3 might have been backported to Qt 5.15 but after 5.15.2.

If you want to use Qt 5, I would recommend you use the version provided with your distribution. It should have everything needed to work with the OpenSSL version distributed.

Leon

@SGaist

Thank you very much!
I see, "Qt6 supports OpenSSL 3 since Qt 6.2.0"

What to do you suggest me to do, since Ubuntu 22.04 comes with OpenSSL 3? Should i start thinking about migrating to Qt 6.2 or should i build OpenSSL 1?

SGaist

@SGaist said in QNetwork problems with SSL, any fix or alternatives?:

If you want to use Qt 5, I would recommend you use the version provided with your distribution. It should have everything needed to work with the OpenSSL version distributed.

Leon

@SGaist

So you recommend that i build openSSL (since my distribution has openSSL 3). Let me know if i understand something wrong.

SGaist

I am suggesting that you install the Qt development packages from your distribution and use that version of Qt to build your application.

You don't have to build anything (beside your application).