Curl: Reg : How to support both TLS and SSL

From: Deepesh Damodaran <deepesh_at_kerala.cc>
Date: Wed, 23 Sep 2009 05:11:14 -0700

Hi all,

One of our application use LIBCURL to perform FTPS transfer. Intention was to connect using either SSL or TLS.

However the options used are

curl_easy_setopt(curl, CURLOPT_FTP_SSL, (long)CURLFTPSSL_ALL);
curl_easy_setopt(curl, CURLOPT_FTPSSLAUTH, (long)CURLFTPAUTH_SSL);
curl_easy_setopt(curl, CURLOPT_SSLVERSION, (long)CURL_SSLVERSION_SSLv3);

As I referred the URL

http://curl.haxx.se/libcurl/c/curl_easy_setopt.html, it mentions CURLUSESSL_ALL option as "Require SSL for all communication or fail with CURLE_USE_SSL_FAILED.

But CURLFTPAUTH_SSL says - "Try "AUTH SSL" first, and only if that fails try "AUTH TLS".

During our testing we found "AUTH TLS" fails. So I am wondering if the 1st and 2nd options are conflicting forcing the application only to use SSL and fail if it is TLS.

Any opinion would be helpful.

Thanks,

Deepesh

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Received on 2009-09-23

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Reg : How to support both TLS and SSL