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CURLOPT_SSLKEYTYPE(3) curl_easy_setopt options CURLOPT_SSLKEYTYPE(3)
CURLOPT_SSLKEYTYPE - type of the private key file
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLKEYTYPE, char *type);
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
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
CURL *curl = curl_easy_init();
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");
ret = curl_easy_perform(curl);
If built TLS enabled.
Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
libcurl 7.86.0 May 17, 2022 CURLOPT_SSLKEYTYPE(3)