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

       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO

       CURLOPT_CAINFO(3), CURLOPT_CAPATH(3), CURLOPT_SSL_VERIFYHOST(3), CURLOPT_SSL_VERIFYPEER(3)

libcurl                                            2025-03-05                             CURLOPT_CAINFO_BLOB(3)