curl/docs/libcurl/opts/CURLOPT_SOCKS5_AUTH.3
Kamil Dudka 8924f58c37 CURLOPT_SOCKS5_AUTH: allowed methods for SOCKS5 proxy auth
If libcurl was built with GSS-API support, it unconditionally advertised
GSS-API authentication while connecting to a SOCKS5 proxy.  This caused
problems in environments with improperly configured Kerberos: a stock
libcurl failed to connect, despite libcurl built without GSS-API
connected fine using username and password.

This commit introduces the CURLOPT_SOCKS5_AUTH option to control the
allowed methods for SOCKS5 authentication at run time.

Note that a new option was preferred over reusing CURLOPT_PROXYAUTH
for compatibility reasons because the set of authentication methods
allowed by default was different for HTTP and SOCKS5 proxies.

Bug: https://curl.haxx.se/mail/lib-2017-01/0005.html
Closes https://github.com/curl/curl/pull/1454
2017-06-28 08:02:58 +02:00

64 lines
2.5 KiB
Groff

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.TH CURLOPT_SOCKS5_AUTH 3 "27 April 2017" "libcurl 7.55.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_SOCKS5_AUTH \- set allowed methods for SOCKS5 proxy authentication
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKS5_AUTH, long bitmask);
.SH DESCRIPTION
Pass a long as parameter, which is set to a bitmask, to tell libcurl which
authentication method(s) are allowed for SOCKS5 proxy authentication. The only
supported flags are \fICURLAUTH_BASIC\fP, which allows username/password
authentication, \fICURLAUTH_GSSAPI\fP, which allows GSS-API authentication, and
\fICURLAUTH_NONE\fP, which allows no authentication. Set the actual user name
and password with the \fICURLOPT_PROXYUSERPWD(3)\fP option.
.SH DEFAULT
CURLAUTH_BASIC|CURLAUTH_GSSAPI
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* request to use a SOCKS5 proxy */
curl_easy_setopt(curl, CURLOPT_PROXY, "socks5://user:pass@myproxy.com");
/* enable username/password authentication only */
curl_easy_setopt(curl, CURLOPT_SOCKS5_AUTH, CURLAUTH_BASIC);
/* Perform the request */
curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Added in 7.55.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_NOT_BUILT_IN if the bitmask contains unsupported flags.
.SH "SEE ALSO"
.BR CURLOPT_PROXY "(3), " CURLOPT_PROXYTYPE "(3)"