Runtime Configuration for CA Certificates for AVS Device SDK

By default libcurl is built with paths to a CA bundle and a directory containing CA certificates. You can direct the AVS Device SDK for C++ to configure libcurl to use an additional path to directories containing CA certificates via the CURLOPT_CAPATH setting. This is done by adding a "libcurlUtils/CURLOPT_CAPATH" entry to the AlexaClientSDKConfig.json file. Here is an example:

{
  "authDelegate" : {
    "clientId" : "INSERT_YOUR_CLIENT_ID_HERE",
    "refreshToken" : "INSERT_YOUR_REFRESH_TOKEN_HERE",
    "clientSecret" : "INSERT_YOUR_CLIENT_SECRET_HERE"
  },
  "libcurlUtils" : {
    "CURLOPT_CAPATH" : "INSERT_YOUR_CA_CERTIFICATE_PATH_HERE"
  }
}

NOTE: If you want to assure that libcurl is only using CA certificates from this path you may need to reconfigure libcurl with the --without-ca-bundle and --without-ca-path options and rebuild it to suppress the default paths. See The libcurl documention for more information.