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CURLOPT_TLSAUTH_USERNAME(3) Library Functions Manual CURLOPT_TLSAUTH_USERNAME(3) NAME CURLOPT_TLSAUTH_USERNAME - username to use for TLS authentication SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TLSAUTH_USERNAME, char *user); DESCRIPTION Pass a char pointer as parameter, which should point to the null-terminated username to use for the TLS authentication method specified with the CUR- LOPT_TLSAUTH_TYPE(3) option. Requires that the CURLOPT_TLSAUTH_PASSWORD(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. DEFAULT NULL PROTOCOLS 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 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_TLSAUTH_TYPE, "SRP"); curl_easy_setopt(curl, CURLOPT_TLSAUTH_USERNAME, "user"); curl_easy_setopt(curl, CURLOPT_TLSAUTH_PASSWORD, "secret"); result = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.21.4 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_TLSAUTH_PASSWORD(3), CURLOPT_TLSAUTH_TYPE(3) libcurl 2026-06-11 CURLOPT_TLSAUTH_USERNAME(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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