CURLOPT_KEYPASSWD(3) Library Functions Manual CURLOPT_KEYPASSWD(3) NAME CURLOPT_KEYPASSWD - passphrase to private key SYNOPSIS #include CURLcode curl_easy_setopt(CURL *handle, CURLOPT_KEYPASSWD, char *pwd); DESCRIPTION Pass a pointer to a null-terminated string as parameter. It is used as the password required to use the CURLOPT_SSLKEY(3) or CURLOPT_SSH_PRIVATE_KEYFILE(3) private key. You never need a pass phrase to load a certificate but you need one to load your private key. The application does not have to keep the string around after setting this option. DEFAULT NULL PROTOCOLS All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc. This option works only with the following TLS backends: OpenSSL, Schannel, mbedTLS and wolfSSL EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode res; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin"); curl_easy_setopt(curl, CURLOPT_SSLCERT, "client.pem"); curl_easy_setopt(curl, CURLOPT_SSLKEY, "key.pem"); curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "superman"); res = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY This option was known as CURLOPT_SSLKEYPASSWD up to 7.16.4 and CURLOPT_SSLCERTPASSWD up to 7.9.2. RETURN VALUE Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space. SEE ALSO CURLOPT_SSH_PRIVATE_KEYFILE(3), CURLOPT_SSLKEY(3) libcurl April 26 2024 CURLOPT_KEYPASSWD(3)