CURLOPT_CAINFO_BLOB(3) curl_easy_setopt options CURLOPT_CAINFO_BLOB(3)
NAME
CURLOPT_CAINFO_BLOB - Certificate Authority (CA) bundle in PEM format
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAINFO_BLOB,
struct curl_blob *stblob);
DESCRIPTION
Pass a pointer to a curl_blob structure, which contains information
(pointer and size) about a memory block with binary data of PEM encoded
content holding one or more certificates to verify the HTTPS server
with.
If CURLOPT_SSL_VERIFYPEER(3) is zero and you avoid verifying the
server's certificate, CURLOPT_CAINFO_BLOB(3) is not needed.
This option overrides CURLOPT_CAINFO(3).
DEFAULT
NULL
PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
EXAMPLE
char *strpem; /* strpem must point to a PEM string */
CURL *curl = curl_easy_init();
if(curl) {
struct curl_blob blob;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
blob.data = strpem;
blob.len = strlen(strpem);
blob.flags = CURL_BLOB_COPY;
curl_easy_setopt(curl, CURLOPT_CAINFO_BLOB, &blob);
ret = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
AVAILABILITY
Added in 7.77.0.
This option is supported by the BearSSL (since 7.79.0), mbedTLS (since
7.81.0), OpenSSL, Secure Transport and Schannel backends.
RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if
not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.
SEE ALSO
CURLOPT_CAINFO(3), CURLOPT_CAPATH(3), CURLOPT_SSL_VERIFYPEER(3), CUR-
LOPT_SSL_VERIFYHOST(3),
libcurl 7.81.0 November 29, 2021 CURLOPT_CAINFO_BLOB(3)
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