--- c: Copyright (C) Daniel Stenberg, , et al. SPDX-License-Identifier: curl Title: CURLOPT_SSLKEY_BLOB Section: 3 Source: libcurl See-also: - CURLOPT_SSLKEY (3) - CURLOPT_SSLKEYTYPE (3) Protocol: - TLS TLS-backend: - OpenSSL --- # NAME CURLOPT_SSLKEY_BLOB - private key for client cert from memory blob # SYNOPSIS ~~~c #include 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 # EXAMPLE ~~~c 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 7.71.0. This option is supported by the OpenSSL backends. # RETURN VALUE Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.