Add (existing) AESCCM ciphers to the supportedCiphers() list

Marc_Van_Daele

When I run the following code snippet

    qDebug() << QSslSocket::sslLibraryBuildVersionString();
    auto configuration = QSslConfiguration::defaultDtlsConfiguration();
    QList<QSslCipher> all_ciphers;
    all_ciphers = configuration.supportedCiphers();
    for(int i=0;i<all_ciphers.length();i++){
        if(all_ciphers[i].name().contains("CCM")) //TLS_PSK_WITH_AES_128_CCM_8  //PSK-AES128-CCM8
                qDebug() << "Cipher " << all_ciphers[i].name();
    }
    qDebug() << "Ciphers: " << all_ciphers.length();

I get

"OpenSSL 1.1.1c  28 May 2019"
Ciphers:  60

This 60 is exactly the same as I get from openssl ciphers -psk -v | wc

However, I want to use the TLS_PSK_WITH_AES_128_CCM_8 (OpenSSL PSK-AES128-CCM8) Cipher. This one is installed because it is shown by openssl ciphers -psk -v AESCCM but how can I get it in the supportedCiphers() list?

Background: I want to connect using qtcoap to an existing coap server using TLS_PSK_WITH_AES_128_CCM_8

SGaist

Hi,

What OS are you running your application on ?

Marc_Van_Daele

I'm running on Ubuntu 16.04. I've compiled Qt 5.13.0 myself against OpenSsl 1.1
I'm not sure whether I should add some Qt API calls to add support for this AESCCM cipher family (which is mandatory for COAP afaik) or whether I should configure OpenSsl itself somehow.