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QSslSocket cannot resolve errors

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  • ocgltdO Offline
    ocgltdO Offline
    ocgltd
    wrote on last edited by ocgltd
    #1

    I recently started rebuilding old (qt 5.9.8 based) apps on Fedora 34. Upon running the app I get the errors below. I've done some searching that suggests its SSL 1.x related, but the various recommended solutions don't feel right or apply. I use network manager for some HTTP POSTs, but that's all. (So https:// is in the URL)

    Some answers in this forum suggest removing DLL's (but I'm using Linux). I have installed Qt Creator using the web installer (not built from source). This OS has OpenSSL 1.1.1k FIPS installed. I'm hoping I don't have to build Qt Creator from source.

    Can someone explain how to fix this properly?

    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
    
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    • Christian EhrlicherC Online
      Christian EhrlicherC Online
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Qt 5.9 needs openssl 1.0

      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
      Visit the Qt Academy at https://academy.qt.io/catalog

      1 Reply Last reply
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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #3

        Hi,

        To add to @Christian-Ehrlicher, OpenSSL 1.1, while a minor release is not backward compatible with OpenSSL 1.0.

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

        ocgltdO 1 Reply Last reply
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        • SGaistS SGaist

          Hi,

          To add to @Christian-Ehrlicher, OpenSSL 1.1, while a minor release is not backward compatible with OpenSSL 1.0.

          ocgltdO Offline
          ocgltdO Offline
          ocgltd
          wrote on last edited by
          #4

          Is it possible to add OpenSSL 1.0 alongside OpenSSL 1.1 (on Fedora 34) - I realize there may not be any Fedora gurus here...so generic linux question.

          Since I have to build using only features up to Qt 5.9.x for older OS's...what the solution?

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          • Christian EhrlicherC Online
            Christian EhrlicherC Online
            Christian Ehrlicher
            Lifetime Qt Champion
            wrote on last edited by
            #5

            @ocgltd said in QSslSocket cannot resolve errors:

            Is it possible to add OpenSSL 1.0 alongside OpenSSL 1.1

            Try it out. I don't see why you should not be able to install two different library versions.

            Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
            Visit the Qt Academy at https://academy.qt.io/catalog

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