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

       This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

       This option works only with the following TLS backends: BearSSL, OpenSSL, Schannel, Secure
       Transport, mbedTLS, rustls and wolfSSL

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);
         }
       }

HISTORY

       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.

AVAILABILITY

       Added in curl 7.77.0

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_VERIFYHOST(3), CURLOPT_SSL_VERIFYPEER(3)