CURLOPT_SSLKEYTYPE(3)

CURLOPT_SSLKEYTYPE3

Type of the private key file

Usage

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLKEYTYPE, char *type);

Overview

Pass a pointer to a null-terminated string as parameter. The string should be the format of your private key. Supported formats are "PEM", "DER" and "ENG".

The format "ENG" enables you to load the private key from a crypto engine. In this case CURLOPT_SSLKEY(3) is used as an identifier passed to the engine. You have to set the crypto engine with CURLOPT_SSLENGINE(3). "DER" format key file currently does not work because of a bug in OpenSSL.

The application does not have to keep the string around after setting this option.

Default

"PEM"

Protocols

All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

Examples

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_SSLKEYTYPE, "PEM");
    curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "s3cret");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

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.

Releases

79 releases since OS X 10.10; the text changed 13 times.

  1. 10.10–10.11.6
  2. 10.12–10.12.5
  3. 10.12.6–10.14.6
  4. 10.15–11.5
  5. 12.0.1–12.2
  6. 12.3–12.5
  7. 13.0
  8. 13.1
  9. 13.2
  10. 13.3
  11. 13.4
  12. 13.5–14.1
  13. 14.2–14.4
  14. 14.5–26.5

Availability

If built TLS enabled.

From curl 166.0.0.0.1 in macOS 26.5. Parsed by carta from the page's man source.