svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
CURLOPT_SSLVERSION(3)
CURLOPT_SSLVERSION(3) curl_easy_setopt options CURLOPT_SSLVERSION(3)
NAME
CURLOPT_SSLVERSION - preferred TLS/SSL version
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLVERSION, long version);
DESCRIPTION
Pass a long as parameter to control which version range of SSL/TLS ver‐
sions to use.
The SSL and TLS versions have typically developed from the most inse‐
cure version to be more and more secure in this order through history:
SSL v2, SSLv3, TLS v1.0, TLS v1.1, TLS v1.2 and the most recent TLS
v1.3.
Use one of the available defines for this purpose. The available
options are:
CURL_SSLVERSION_DEFAULT
The default acceptable version range. The minimum accept‐
able version is by default TLS v1.0 since 7.39.0 (unless
the TLS library has a stricter rule).
CURL_SSLVERSION_TLSv1
TLS v1.0 or later
CURL_SSLVERSION_SSLv2
SSL v2 - refused
CURL_SSLVERSION_SSLv3
SSL v3 - refused
CURL_SSLVERSION_TLSv1_0
TLS v1.0 or later (Added in 7.34.0)
CURL_SSLVERSION_TLSv1_1
TLS v1.1 or later (Added in 7.34.0)
CURL_SSLVERSION_TLSv1_2
TLS v1.2 or later (Added in 7.34.0)
CURL_SSLVERSION_TLSv1_3
TLS v1.3 or later (Added in 7.52.0)
The maximum TLS version can be set by using one of the CURL_SSLVER‐
SION_MAX_ macros below. It is also possible to OR one of the
CURL_SSLVERSION_ macros with one of the CURL_SSLVERSION_MAX_ macros.
The MAX macros are not supported for WolfSSL.
CURL_SSLVERSION_MAX_DEFAULT
The flag defines the maximum supported TLS version by
libcurl, or the default value from the SSL library is
used. libcurl will use a sensible default maximum, which
was TLS v1.2 up to before 7.61.0 and is TLS v1.3 since
then - assuming the TLS library support it. (Added in
7.54.0)
CURL_SSLVERSION_MAX_TLSv1_0
The flag defines maximum supported TLS version as TLS
v1.0. (Added in 7.54.0)
CURL_SSLVERSION_MAX_TLSv1_1
The flag defines maximum supported TLS version as TLS
v1.1. (Added in 7.54.0)
CURL_SSLVERSION_MAX_TLSv1_2
The flag defines maximum supported TLS version as TLS
v1.2. (Added in 7.54.0)
CURL_SSLVERSION_MAX_TLSv1_3
The flag defines maximum supported TLS version as TLS
v1.3. (Added in 7.54.0)
In versions of curl prior to 7.54 the CURL_SSLVERSION_TLS options were
documented to allow only the specified TLS version, but behavior was
inconsistent depending on the TLS library.
DEFAULT
CURL_SSLVERSION_DEFAULT
PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* ask libcurl to use TLS version 1.0 or later */
curl_easy_setopt(curl, CURLOPT_SSLVERSION, (long)CURL_SSLVERSION_TLSv1);
/* Perform the request */
curl_easy_perform(curl);
}
AVAILABILITY
SSLv2 and SSLv3 are refused completely since curl 7.77.0
SSLv2 is disabled by default since 7.18.1. Other SSL versions avail‐
ability may vary depending on which backend libcurl has been built to
use.
SSLv3 is disabled by default since 7.39.0.
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
if not.
SEE ALSO
CURLOPT_USE_SSL(3), CURLOPT_HTTP_VERSION(3), CURLOPT_PROXY_SSLVER‐
SION(3), CURLOPT_IPRESOLVE(3)
libcurl 7.86.0 October 22, 2022 CURLOPT_SSLVERSION(3)