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gnutls_x509_crt_get_extension_info(3)	      gnutls	    gnutls_x509_crt_get_extension_info(3)

       gnutls_x509_crt_get_extension_info - API function

       #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);

       gnutls_x509_crt_t cert
		   should contain a gnutls_x509_crt_t structure

       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.

       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_data() 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.

       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.

       Report bugs to <bug-gnutls@gnu.org>.
       General guidelines for reporting bugs: http://www.gnu.org/gethelp/
       GnuTLS home page: http://www.gnu.org/software/gnutls/

       Copyright (C) 2012 Free Software Foundation, Inc..
       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.

       The  full  documentation  for  gnutls  is maintained as a Texinfo manual.  If the info and
       gnutls programs are properly installed at your site, the command

	      info gnutls

       should give you access to the complete manual.  As an alternative you may obtain the  man-
       ual from:


gnutls					      3.1.15	    gnutls_x509_crt_get_extension_info(3)
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