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   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

       Used with HTTPS proxy

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/");
         /* 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);
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY

       Added in 7.77.0.

       This option is supported by the rustls  (since  7.82.0),  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_PROXY_CAINFO(3),     CURLOPT_PROXY_CAPATH(3),     CURLOPT_PROXY_SSL_VERIFYPEER(3),
       CURLOPT_PROXY_SSL_VERIFYHOST(3),         CURLOPT_CAINFO(3),        CURLOPT_CAINFO_BLOB(3),
       CURLOPT_CAPATH(3), CURLOPT_SSL_VERIFYPEER(3), CURLOPT_SSL_VERIFYHOST(3),