CURLOPT_TLSAUTH_PASSWORD - password to use for TLS authentication

Added in curl 7.21.4

NULL

Pass a char pointer as parameter, which should point to the null-terminated password to use for the TLS authentication method specified with the CURLOPT_TLSAUTH_TYPE(3) option. Requires that the CURLOPT_TLSAUTH_USERNAME(3) option also be set. The application does not have to keep the string around after setting this option. Using this option multiple times makes the last set string override the previous ones. Set it to NULL to disable its use again. This feature relies on TLS SRP which does not work with TLS 1.3.

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_TLSAUTH_TYPE, "SRP"); curl_easy_setopt(curl, CURLOPT_TLSAUTH_USERNAME, "user"); curl_easy_setopt(curl, CURLOPT_TLSAUTH_PASSWORD, "secret"); res = curl_easy_perform(curl); curl_easy_cleanup(curl); } }

CURLOPT_TLSAUTH_PASSWORD - password to use for TLS authentication

This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc. This option works only with the following TLS backends: GnuTLS and OpenSSL

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).

CURLOPT_PROXY_TLSAUTH_PASSWORD(3), CURLOPT_TLSAUTH_TYPE(3), CURLOPT_TLSAUTH_USERNAME(3) libcurl 2025-06-16 CURLOPT_TLSAUTH_PASSWORD(3)

#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TLSAUTH_PASSWORD, char *pwd);