.\" generated by cd2nroff 0.1 from CURLOPT_SSLCERTTYPE.md
.TH CURLOPT_SSLCERTTYPE 3 "April 26 2024" libcurl
.SH NAME
CURLOPT_SSLCERTTYPE \- type of client SSL certificate
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLCERTTYPE, char *type);
.fi
.SH DESCRIPTION
Pass a pointer to a null\-terminated string as parameter. The string should be
the format of your certificate.

Supported formats are "PEM" and "DER", except with Secure Transport or
Schannel. OpenSSL (versions 0.9.3 and later), Secure Transport (on iOS 5 or
later, or OS X 10.7 or later) and Schannel support "P12" for PKCS#12\-encoded
files.

The application does not have to keep the string around after setting this
option.
.SH DEFAULT
\&"PEM"
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

This option works only with the following TLS backends:
GnuTLS, OpenSSL, Schannel, Secure Transport, mbedTLS and wolfSSL
.SH EXAMPLE
.nf
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_SSLCERTTYPE, "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);
  }
}
.fi
.SH AVAILABILITY
If built TLS enabled. Added in 7.9.3
.SH RETURN VALUE
Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH SEE ALSO
.BR CURLOPT_SSLCERT (3),
.BR CURLOPT_SSLKEY (3)