87 lines
1.8 KiB
Markdown
87 lines
1.8 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLOPT_USE_SSL
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLOPT_PROXY_SSLVERSION (3)
|
||
|
|
- CURLOPT_SSLVERSION (3)
|
||
|
|
- CURLOPT_SSL_OPTIONS (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLOPT_USE_SSL - request using SSL / TLS for the transfer
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#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
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
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, (long)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.
|