Initializing SSL and libcurl and getting “out of memory”

Question

I intend to do https requests with libcurl and openssl with a C++ program.

I initialized libcurl with curl_global_init(CURL_GLOBAL_ALL) as described in the

Answer 1

I'm not aware of any problem in libcurl that would cause this error code to get returned if indeed a memory allocation function doesn't fail. Using OpenSSL in multiple modules does not cause such a failure. (I am the lead developer of libcurl.)

So, run your app with VERBOSE set to libcurl, or even strace to see which syscall that fails and it should give you more clues.

Answer 2

As the descibed in this answer, you might need to disable SSLv3 if you are on Ubuntu 16.04 like so

curl_easy_setopt(curl_, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2));

It was disabled on Ubuntu 16.04 for security reasons, see more here.