NAME

       gnutls_x509_crt_get_issuer_unique_id - API function

SYNOPSIS

       #include <gnutls/x509.h>

       int  gnutls_x509_crt_get_issuer_unique_id(gnutls_x509_crt_t  crt,  char  *  buf,  size_t *
       buf_size);

ARGUMENTS

       gnutls_x509_crt_t crt
                   Holds the certificate

       char * buf  user allocated memory buffer, will hold the unique id

       size_t * buf_size
                   size of user allocated memory buffer (on input), will hold actual size of  the
                   unique ID on return.

DESCRIPTION

       This   function  will  extract  the  issuerUniqueID  value  (if  present)  for  the  given
       certificate.

       If the user allocated memory buffer is not large enough to hold the full  subjectUniqueID,
       then  a  GNUTLS_E_SHORT_MEMORY_BUFFER  error will be returned, and buf_size will be set to
       the actual length.

       This function had a bug prior to 3.4.8 that prevented the setting of NULL  buf to discover
       the   buf_size  .  To  use this function safely with the older versions the  buf must be a
       valid buffer that can hold at least a single byte if  buf_size is zero.

RETURNS

       GNUTLS_E_SUCCESS on success, otherwise a negative error code.

SINCE

       2.12.0

REPORTING BUGS

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

COPYRIGHT

       Copyright © 2001- 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

       https://www.gnutls.org/manual/