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
FTP, SMTP, POP3, IMAP, LDAP
- 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
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, 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 if not.