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.\" generated by cd2nroff 0.1 from CURLOPT_PROXY_SSLKEY_BLOB.md
.TH CURLOPT_PROXY_SSLKEY_BLOB 3 "2025-06-27" libcurl
.SH NAME
CURLOPT_PROXY_SSLKEY_BLOB \- private key for proxy cert from memory blob
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLKEY_BLOB,
struct curl_blob *blob);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_blob structure that contains information (pointer and
size) about the private key for connecting to the HTTPS proxy. Compatible with
OpenSSL. The format (like "PEM") must be specified with
\fICURLOPT_PROXY_SSLKEYTYPE(3)\fP.
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.
.SH DEFAULT
NULL
.SH PROTOCOLS
This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
This option works only with the following TLS backends:
OpenSSL
.SH EXAMPLE
.nf
extern char *certificateData; /* point to data */
extern size_t filesize; /* size of data */
extern char *privateKeyData; /* point to data */
extern size_t privateKeySize; /* size */
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/");
curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy");
blob.data = certificateData;
blob.len = filesize;
blob.flags = CURL_BLOB_COPY;
curl_easy_setopt(curl, CURLOPT_PROXY_SSLCERT_BLOB, &blob);
curl_easy_setopt(curl, CURLOPT_PROXY_SSLCERTTYPE, "PEM");
blob.data = privateKeyData;
blob.len = privateKeySize;
curl_easy_setopt(curl, CURLOPT_PROXY_SSLKEY_BLOB, &blob);
curl_easy_setopt(curl, CURLOPT_PROXY_KEYPASSWD, "s3cret");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in curl 7.71.0
.SH RETURN VALUE
\fIcurl_easy_setopt(3)\fP returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non\-zero means an error occurred, see
\fIlibcurl\-errors(3)\fP.
.SH SEE ALSO
.BR CURLOPT_SSLKEY (3),
.BR CURLOPT_SSLKEYTYPE (3),
.BR CURLOPT_SSLKEY_BLOB (3)