NAME

       CURLOPT_PROXY_CAINFO_BLOB - proxy Certificate Authority (CA) bundle in PEM format

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAINFO_BLOB,
                                 struct curl_blob *stblob);

DESCRIPTION

       This option is for connecting to an HTTPS proxy, not an HTTPS server.

       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 proxy 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_PROXY_SSL_VERIFYPEER(3)   is  zero  and  you  avoid  verifying  the  server's
       certificate, CURLOPT_PROXY_CAINFO_BLOB(3) is not needed.

       This option overrides CURLOPT_PROXY_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:  OpenSSL,  Schannel,  Secure
       Transport and rustls

EXAMPLE

       #include <string.h> /* for strlen */

       extern char *strpem; /* strpem must point to a PEM string */
       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/");
           /* using an HTTPS proxy */
           curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:443");
           blob.data = strpem;
           blob.len = strlen(strpem);
           blob.flags = CURL_BLOB_COPY;
           curl_easy_setopt(curl, CURLOPT_PROXY_CAINFO_BLOB, &blob);
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

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_CAINFO_BLOB(3),  CURLOPT_CAPATH(3),   CURLOPT_PROXY_CAINFO(3),
       CURLOPT_PROXY_CAPATH(3), CURLOPT_PROXY_SSL_VERIFYHOST(3), CURLOPT_PROXY_SSL_VERIFYPEER(3),
       CURLOPT_SSL_VERIFYHOST(3), CURLOPT_SSL_VERIFYPEER(3)