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CURLOPT_SSLCERT_BLOB(3)	   Library Functions Manual    CURLOPT_SSLCERT_BLOB(3)

NAME
       CURLOPT_SSLCERT_BLOB - SSL client certificate from memory blob

SYNOPSIS
       #include	<curl/curl.h>

       CURLcode	curl_easy_setopt(CURL *handle, CURLOPT_SSLCERT_BLOB,
				 struct	curl_blob *stblob);

DESCRIPTION
       Pass  a	pointer	 to a curl_blob	structure, which contains (pointer and
       size) a client certificate. The format must be "P12" on	Secure	Trans-
       port  or	 Schannel.  The	 format	must be	"P12" or "PEM" on OpenSSL. The
       format must be "DER" or "PEM" on	mbedTLS. The format must be  specified
       with CURLOPT_SSLCERTTYPE(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_SSLCERT(3) which  instead  ex-
       pects 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,	Schan-
       nel, Secure Transport, mbedTLS and wolfSSL

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

       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   CURLcode res;
	   struct curl_blob stblob;
	   stblob.data = certificateData;
	   stblob.len =	filesize;
	   stblob.flags	= CURL_BLOB_COPY;
	   curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
	   curl_easy_setopt(curl, CURLOPT_SSLCERT_BLOB,	&stblob);
	   curl_easy_setopt(curl, CURLOPT_SSLCERTTYPE, "P12");
	   curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "s3cret");
	   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).

SEE ALSO
       CURLOPT_KEYPASSWD(3), CURLOPT_SSLCERTTYPE(3), CURLOPT_SSLKEY(3)

libcurl				  2025-06-03	       CURLOPT_SSLCERT_BLOB(3)

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