gnutls_x509_crt_get_key_id man page on FreeBSD

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gnutls_x509_crt_get_key_id(3)	    gnutls	 gnutls_x509_crt_get_key_id(3)

NAME
       gnutls_x509_crt_get_key_id  -  Return unique ID of public key's parame‐
       ters

SYNOPSIS
       #include <gnutls/x509.h>

       int  gnutls_x509_crt_get_key_id(gnutls_x509_crt_t  crt,	unsigned   int
       flags, unsigned char * output_data, size_t * output_data_size);

ARGUMENTS
       gnutls_x509_crt_t crt
		   Holds the certificate

       unsigned int flags
		   should be 0 for now

       unsigned char * output_data
		   will contain the key ID

       size_t * output_data_size
		   holds  the size of output_data (and will be replaced by the
		   actual size of parameters)

DESCRIPTION
       This function will return a unique ID the depends  on  the  public  key
       parameters.  This ID can be used in checking whether a certificate cor‐
       responds to the given private key.

       If the buffer provided is not long enough  to  hold  the	 output,  then
       *output_data_size  is  updated and GNUTLS_E_SHORT_MEMORY_BUFFER will be
       returned.  The output will normally be a SHA-1 hash output, which is 20
       bytes.

RETURN VALUE
       In case of failure a negative value will be returned, and 0 on success.

REPORTING BUGS
       Report	 bugs	 to    <bug-gnutls@gnu.org>.	 GnuTLS	  home	 page:
       http://www.gnu.org/software/gnutls/ General help	 using	GNU  software:
       http://www.gnu.org/gethelp/

COPYRIGHT
       Copyright © 2008 Free Software Foundation.
       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 info and gnutls programs are properly installed  at  your	 site,
       the command

	      info gnutls

       should give you access to the complete manual.

gnutls				     2.8.6	 gnutls_x509_crt_get_key_id(3)
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