Please convert to use the system's crypto policy for SSL and TLS: https://fedoraproject.org/wiki/Packaging:CryptoPolicies If this program is compiled against gnutls, change the default priority string to be "@SYSTEM" or to use gnutls_set_default_priority(). If this program is compiled against openssl, and there is no default cipher list specified, you don't need to modify it. Otherwise replace the default cipher list with "PROFILE=SYSTEM". In both cases please verify that the application uses the system's crypto policies. If the package is already using the system-wide crypto policies, or it does not use SSL or TLS, no action is required, the bug can simply be closed.
In latest aqbanking-5.5.1-1.fc23 package neither SSL_CTX_set_cipher_list nor gnutls_priority_set_direct, gnutls_priority_init or gnutls_set_default_priority are present. According to the spec file neither OpenSSL nor GnuTLS are directly consumed, but xmlsec1-gnutls-devel. Looking however to gwenhywfar, gnutls_set_default_priority() is being called before gnutls_protocol_set_priority().
(In reply to Robert Scheck from comment #1) > Looking however to gwenhywfar, gnutls_set_default_priority() is being called > before gnutls_protocol_set_priority(). In that case, the gnutls_set_default_priority() is not used at all. It is overriden by the second call, so you may need to apply the default policies by removing the second call, or by the other methods indicated.
From following the code, AFAICT (removing lots of extraneous lines) ... #if 1 /* old code */ rv=gnutls_set_default_priority(xio->session); if (rv) { gnutls_deinit(xio->session); return GWEN_ERROR_GENERIC; } /* possibly force protocol priority */ if (lflags & GWEN_SYNCIO_TLS_FLAGS_FORCE_SSL_V3) { const int proto_prio[2] = { GNUTLS_SSL3, 0 }; rv=gnutls_protocol_set_priority(xio->session, proto_prio); if (rv) { gnutls_deinit(xio->session); return GWEN_ERROR_GENERIC; } } #else /* new code */ ... lots of other stuff ... #endif So, for now, it looks like we do the right thing out of the box. GWEN_SYNCIO_TLS_FLAGS_FORCE_SSL_V3 is a caller-set flag, that is plumbed through aqbanking as an account specific setting. It's not on by default.
Closing as WORKSFORME - AFAICT it's doing the right thing.