Tribblix: manual page: CURLOPT_SSLKEY

CURLOPT_SSLKEY_BLOB(3) Introduction to Library Functions

NAME

CURLOPT_SSLKEY_BLOB - private key for client cert from memory blob

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLKEY_BLOB,
struct curl_blob *blob);

DESCRIPTION

Pass a pointer to a curl_blob structure, which contains information
(pointer and size) for a private key. Compatible with OpenSSL. The
format (like "PEM") must be specified with CURLOPT_SSLKEYTYPE(3).

If the blob is initialized with the flags member of struct curl_blob
set to CURL_BLOB_COPY, the application does not have to keep the
buffer around after setting this.

This option is an alternative to CURLOPT_SSLKEY(3) which instead
expects a filename as input.

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 and
wolfSSL

EXAMPLE

extern char *certificateData; /* point to cert */
extern size_t filesize; /* size of cert */

extern char *privateKeyData; /* point to key */
extern size_t privateKeySize; /* size of key */

int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
struct curl_blob blob;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
blob.data = certificateData;
blob.len = filesize;
blob.flags = CURL_BLOB_COPY;
curl_easy_setopt(curl, CURLOPT_SSLCERT_BLOB, &blob);
curl_easy_setopt(curl, CURLOPT_SSLCERTTYPE, "PEM");

blob.data = privateKeyData;
blob.len = privateKeySize;
curl_easy_setopt(curl, CURLOPT_SSLKEY_BLOB, &blob);
curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "s3cret");
curl_easy_setopt(curl, CURLOPT_SSLKEYTYPE, "PEM");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}

AVAILABILITY

Added in curl 7.71.0

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).