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)