how to use SSL in C++ gSOAP generated classes

Question

i need to use gsoap library in C++ and i need to use https. documentation says how to work with HTTPS in C, but not in C++ (http://www.cs.fsu.edu/~engelen/soapdoc2.html#tth_sEc1

Answer 1

I have experienced the same problem today. I was using Ubuntu 14.04 on VirtualBox and Gsoap 2.8.21.

I generated C++ proxy classes with command:

soapcpp2 -1 -I/opt/libraries/gsoap/build/2.8.21/share/gsoap/import -C -j temporary.h 

At a first place, I used the aforementioned solution and set ssl_flags to SOAP_SSL_NO_AUTHENTICATION. Thanks to this error disappeared.

Moreover I observed that while changing flags to SOAP_TLSv1, it also makes the errors disappear. The flag that causes headaches was SOAP_SSL_REQUIRE_SERVER_AUTHENTICATION which is by default set inside SOAP_SSL_DEFAULT flag.

Everything seemed fine, until I recompiled gsoap from source with flag --enable-debug. Soon after I started to see something like:

SSL verify error or warning with certificate at depth 1: unable to get local issuer certificate

The best solution I found so far is to download the cacerts.pem file from gsoap site https://www.cs.fsu.edu/~engelen/cacerts.pem.zip and unzip them next to your executable.

And of course in your code you should have something similar to:

soap *soap = soap_new();
soap->ssl_flags = SOAP_SSL_DEFAULT;

soap_register_plugin(soap, soap_wsse);
soap->cafile = "cacerts.pem";

Then all the warning and error messages disappear.