CURLOPT_PROXY_TLSAUTH_TYPE(3)                         Library Functions Manual

NAME
       CURLOPT_PROXY_TLSAUTH_TYPE - HTTPS proxy TLS authentication methods

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLSAUTH_TYPE,
                                 char *type);

DESCRIPTION
       Pass a pointer to a null-terminated string as parameter. The string
       should be the method of the TLS authentication used for the HTTPS
       connection. Supported method is "SRP".

       Using this option multiple times makes the last set string override the
       previous ones. Set it to NULL to restore to internal default.

       The application does not have to keep the string around after setting
       this option.

       SRP    TLS-SRP authentication. Secure Remote Password authentication
              for TLS is defined in RFC 5054 and provides mutual
              authentication if both sides have a shared secret. To use
              TLS-SRP, you must also set the CURLOPT_PROXY_TLSAUTH_USERNAME(3)
              and CURLOPT_PROXY_TLSAUTH_PASSWORD(3) options.

DEFAULT
       blank

DEPRECATED
       This option was deprecated in 8.22.0.

PROTOCOLS
       This functionality affects  all TLS based protocols: HTTPS, FTPS,
       IMAPS, POP3S, SMTPS etc. only

       This option works only with the following TLS backends: GnuTLS and
       OpenSSL

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode result;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
           curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy.example");
           curl_easy_setopt(curl, CURLOPT_PROXY_TLSAUTH_TYPE, "SRP");
           curl_easy_setopt(curl, CURLOPT_PROXY_TLSAUTH_USERNAME, "user");
           curl_easy_setopt(curl, CURLOPT_PROXY_TLSAUTH_PASSWORD, "secret");
           result = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY
       Added in curl 7.52.0

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK (0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLOPT_PROXY_TLSAUTH_PASSWORD(3), CURLOPT_PROXY_TLSAUTH_USERNAME(3),
       CURLOPT_TLSAUTH_PASSWORD(3), CURLOPT_TLSAUTH_USERNAME(3)

libcurl                           2026-09-02     CURLOPT_PROXY_TLSAUTH_TYPE(3)