libcurl ssl connection problem

[jvdw]

When I try to connect to an HTTP server with TLS, with the following options in the C code:

    curl_easy_setopt(curl, CURLOPT_SSLCERTTYPE, "PEM");
    curl_easy_setopt(curl, CURLOPT_SSLCERT,client_pem);
    curl_easy_setopt(curl, CURLOPT_SSLKEYTYPE, "PEM");
    curl_easy_setopt(curl, CURLOPT_SSLKEY, ssl_key);
    curl_easy_setopt(curl, CURLOPT_CAINFO, ca_file);
    curl_easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER,1L);

I get connection problems. Linking instead with a newer version of libcurl (obtained from Github) doesn't give this error. Also, doing the request by hand (with curl, the binary) with the same keys/certs/etc does not give this error.

System info:

Description: Ubuntu 14.04.1 LTS
Release: 14.04

Package info:

libcurl4-openssl-dev:
  Installed: (none)
  Candidate: 7.35.0-1ubuntu2.3
  Version table:
     7.35.0-1ubuntu2.3 0
        500 http://nl.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     7.35.0-1ubuntu2 0
        500 http://nl.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages