NAME

       gnutls_x509_crt_get_extension_info - API function

SYNOPSIS

       #include <gnutls/x509.h>

       int  gnutls_x509_crt_get_extension_info(gnutls_x509_crt_t  cert,  int  indx,  void  * oid,
       size_t * oid_size, unsigned int * critical);

ARGUMENTS

       gnutls_x509_crt_t cert
                   should contain a gnutls_x509_crt_t type

       int indx    Specifies which extension OID to send. Use (0) to get the first one.

       void * oid  a pointer to a structure to hold the OID

       size_t * oid_size
                   initially holds the maximum size of  oid , on return holds actual size of  oid
                   .

       unsigned int * critical
                   output variable with critical flag, may be NULL.

DESCRIPTION

       This function will return the requested extension OID in the certificate, and the critical
       flag for it.  The extension OID will be stored as a string in the  provided  buffer.   Use
       gnutls_x509_crt_get_extension() to extract the data.

       If the buffer provided is not long enough to hold the output, then
        oid_size  is updated and GNUTLS_E_SHORT_MEMORY_BUFFER will be returned. The  oid returned
       will be null terminated, although
        oid_size will not account for the trailing null.

RETURNS

       On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error code is returned.
       If  you  have  reached  the last extension available GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE
       will be returned.

REPORTING BUGS

       Report bugs to <bugs@gnutls.org>.
       Home page: http://www.gnutls.org

COPYRIGHT

       Copyright © 2001-2021 Free Software Foundation, Inc., and others.
       Copying and distribution of this file, with or without modification, are permitted in  any
       medium without royalty provided the copyright notice and this notice are preserved.

SEE ALSO

       The   full   documentation  for  gnutls  is  maintained  as  a  Texinfo  manual.   If  the
       /usr/share/doc/gnutls/ directory does not contain the HTML form visit

       http://www.gnutls.org/manual/