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  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.

       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

       #include <string.h>

       int main(void)
       {
         char *strpem; /* strpem must point to a PEM string */
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           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);
           res = 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), rustls (since 7.82.0),
       wolfSSL (since 8.2.0), 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), CURLOPT_SSL_VERIFYHOST(3)