CURLINFO_HTTPAUTH_USED(3)  Library Functions Manual  CURLINFO_HTTPAUTH_USED(3)

NAME
       CURLINFO_HTTPAUTH_USED - get used HTTP authentication method

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTPAUTH_USED, long *authp);

DESCRIPTION
       Pass a pointer to a long to receive a bitmask indicating the
       authentication method that was used in the previous HTTP request. The
       meaning of the possible bits is explained in the CURLOPT_HTTPAUTH(3)
       option for curl_easy_setopt(3).

       The returned value has zero or one bit set.

PROTOCOLS
       This functionality affects http only

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
           curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC | CURLAUTH_DIGEST);
           curl_easy_setopt(curl, CURLOPT_USERNAME, "shrek");
           curl_easy_setopt(curl, CURLOPT_PASSWORD, "swamp");

           res = curl_easy_perform(curl);

           if(!res) {
             long auth;
             res = curl_easy_getinfo(curl, CURLINFO_HTTPAUTH_USED, &auth);
             if(!res) {
               if(!auth)
                 printf("No auth used\n");
               else {
                 if(auth == CURLAUTH_DIGEST)
                   printf("Used Digest authentication\n");
                 else
                   printf("Used Basic authentication\n");
               }
             }
           }
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY
       Added in curl 8.12.0

RETURN VALUE
       curl_easy_getinfo(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
       CURLINFO_HTTPAUTH_AVAIL(3), CURLINFO_PROXYAUTH_USED(3),
       CURLOPT_HTTPAUTH(3)

libcurl                           2025-02-13         CURLINFO_HTTPAUTH_USED(3)