CURLOPT_USE_SSL - request using SSL / TLS for the transfer
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USE_SSL, long level);
CURLOPT_USE_SSL(3) curl_easy_setopt options CURLOPT_USE_SSL(3)
NAME
CURLOPT_USE_SSL - request using SSL / TLS for the transfer
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USE_SSL, long level);
DESCRIPTION
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.
CURLUSESSL_NONE
do not attempt to use SSL.
CURLUSESSL_TRY
Try using SSL, proceed as normal otherwise. Note that server may
close the connection if the negotiation does not succeed.
CURLUSESSL_CONTROL
Require SSL for the control connection or fail with
CURLE_USE_SSL_FAILED.
CURLUSESSL_ALL
Require SSL for all communication or fail with
CURLE_USE_SSL_FAILED.
DEFAULT
CURLUSESSL_NONE
PROTOCOLS
FTP, SMTP, POP3, IMAP, LDAP
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
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 */
curl_easy_perform(curl);
}
AVAILABILITY
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.
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
if not.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | web/curl |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
CURLOPT_SSLVERSION(3), CURLOPT_PROXY_SSLVERSION(3), CUR-
LOPT_SSL_OPTIONS(3),
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://curl.se/down-
load/curl-7.83.1.tar.bz2.
Further information about this software can be found on the open source
community website at http://curl.haxx.se/.
libcurl 7.83.1 November 30, 2021 CURLOPT_USE_SSL(3)