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.TH CURLOPT_SSLCERT 3 "November 04, 2020" "libcurl 7.78.0" "curl_easy_setopt options"

.SH NAME
CURLOPT_SSLCERT \- set SSL client certificate
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLCERT, char *cert);
.SH DESCRIPTION
Pass a pointer to a null-terminated string as parameter. The string should be
the file name of your client certificate. The default format is "P12" on
Secure Transport and "PEM" on other engines, and can be changed with
\fICURLOPT_SSLCERTTYPE(3)\fP.

With NSS or Secure Transport, this can also be the nickname of the certificate
you wish to authenticate with as it is named in the security database. If you
want to use a file from the current directory, please precede it with "./"
prefix, in order to avoid confusion with a nickname.

(Schannel only) Client certificates can be specified by a path expression to
a certificate store. (You can import PFX to a store first). You can use
"<store location>\\<store name>\\<thumbprint>" to refer to a certificate
in the system certificates store, for example,
"CurrentUser\\MY\\934a7ac6f8a5d579285a74fa61e19f23ddfe8d7a". Thumbprint is
usually a SHA-1 hex string which you can see in certificate details. Following
store locations are supported: CurrentUser, LocalMachine, CurrentService,
Services, CurrentUserGroupPolicy, LocalMachineGroupPolicy,
LocalMachineEnterprise.
Schannel also support P12 certificate file, with the string "P12" specified
with \fICURLOPT_SSLCERTTYPE(3)\fP.

When using a client certificate, you most likely also need to provide a
private key with \fICURLOPT_SSLKEY(3)\fP.

The application does not have to keep the string around after setting this
option.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
  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");
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}
.fi
.SH AVAILABILITY
If built TLS enabled.
.SH RETURN VALUE
Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_SSLCERTTYPE "(3), " CURLOPT_SSLKEY "(3), "