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23 .TH CURLOPT_PROXY_SSLVERSION 3 "August 12, 2017" "libcurl 7.56.1" "curl_easy_setopt options"
26 CURLOPT_PROXY_SSLVERSION \- set preferred proxy TLS/SSL version
28 #include <curl/curl.h>
30 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLVERSION, long version);
32 Pass a long as parameter to control which version of SSL/TLS to attempt to use
33 when connecting to an HTTPS proxy.
35 Use one of the available defines for this purpose. The available options are:
37 .IP CURL_SSLVERSION_DEFAULT
38 The default action. This will attempt to figure out the remote SSL protocol
40 .IP CURL_SSLVERSION_TLSv1
42 .IP CURL_SSLVERSION_TLSv1_0
44 .IP CURL_SSLVERSION_TLSv1_1
46 .IP CURL_SSLVERSION_TLSv1_2
48 .IP CURL_SSLVERSION_TLSv1_3
50 .IP CURL_SSLVERSION_MAX_DEFAULT
51 The flag defines the maximum supported TLS version as TLSv1.2, or the default
52 value from the SSL library. Only the NSS library currently allows one to get
53 the maximum supported TLS version.
55 .IP CURL_SSLVERSION_MAX_TLSv1_0
56 The flag defines maximum supported TLS version as TLSv1.0.
58 .IP CURL_SSLVERSION_MAX_TLSv1_1
59 The flag defines maximum supported TLS version as TLSv1.1.
61 .IP CURL_SSLVERSION_MAX_TLSv1_2
62 The flag defines maximum supported TLS version as TLSv1.2.
64 .IP CURL_SSLVERSION_MAX_TLSv1_3
65 The flag defines maximum supported TLS version as TLSv1.3.
69 CURL_SSLVERSION_DEFAULT
74 CURL *curl = curl_easy_init();
76 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
78 /* ask libcurl to use TLS version 1.0 or later */
79 curl_easy_setopt(curl, CURLOPT_PROXY_SSLVERSION, CURL_SSLVERSION_TLSv1_1 |
80 CURL_SSLVERSION_MAX_DEFAULT);
82 /* Perform the request */
83 curl_easy_perform(curl);
89 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
91 .BR CURLOPT_USE_SSL "(3), " CURLOPT_HTTP_VERSION "(3), "
92 .BR CURLOPT_IPRESOLVE "(3) " CURLOPT_SSLVERSION "(3), "