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¶

Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO¶

CURLOPT_SSLKEY(3), CURLOPT_SSLKEYTYPE(3)