DragonFly On-Line Manual Pages
CURLOPT_USE_SSL(3) curl_easy_setopt options CURLOPT_USE_SSL(3)
CURLOPT_USE_SSL - request using SSL / TLS for the transfer
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USE_SSL, long level);
Pass a long using one of the values from below, to make libcurl use
your desired level of SSL for the transfer.
These are all protocols that start out plain text and get "upgraded" to
SSL using the STARTTLS command.
This is for enabling SSL/TLS when you use FTP, SMTP, POP3, IMAP etc.
do not attempt to use SSL.
Try using SSL, proceed as normal otherwise. Note that server may
close the connection if the negotiation does not succeed.
Require SSL for the control connection or fail with
Require SSL for all communication or fail with
FTP, SMTP, POP3, IMAP, LDAP
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/file.ext");
/* require use of SSL for this, or fail */
curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_ALL);
/* Perform the request */
Added in 7.11.0. This option was known as CURLOPT_FTP_SSL up to 7.16.4,
and the constants were known as CURLFTPSSL_* Handled by LDAP since
7.81.0. Fully supported by the OpenLDAP backend only.
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
libcurl 7.87.0 October 22, 2022 CURLOPT_USE_SSL(3)