CURLOPT_SSLKEY(3) Library Functions Manual CURLOPT_SSLKEY(3)
NAME
CURLOPT_SSLKEY - private key file for TLS and SSL client cert
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLKEY, char *keyfile);
DESCRIPTION
Pass a pointer to a null-terminated string as parameter. The string
should be the filename of your private key. The default format is "PEM"
and can be changed with CURLOPT_SSLKEYTYPE(3).
(Windows, iOS and macOS) This option is ignored by Secure Transport and
Schannel SSL backends because they expect the private key to be already
present in the key-chain or PKCS#12 file containing the certificate.
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.
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: 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/");
curl_easy_setopt(curl, CURLOPT_SSLCERT, "client.pem");
curl_easy_setopt(curl, CURLOPT_SSLKEY, "key.pem");
curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "s3cret");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
AVAILABILITY
Added in curl 7.9.3
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_SSLCERT(3), CURLOPT_SSLKEYTYPE(3), CURLOPT_SSLKEY_BLOB(3)
libcurl 2025-02-08 CURLOPT_SSLKEY(3)
curl 8.12.0 - Generated Wed Feb 19 08:31:04 CST 2025