gnutls_x509_crt_get_subject_alt_name man page on aLinux

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gnutls_x509_crt_get_subject_alt_namegnugnutls_x509_crt_get_subject_alt_name(3)

NAME
       gnutls_x509_crt_get_subject_alt_name  -	This function returns the cer‐
       tificate's alternative name, if any

SYNOPSIS
       #include <gnutls/x509.h>

       int    gnutls_x509_crt_get_subject_alt_name(gnutls_x509_crt_t	 cert,
       unsigned	 int seq, void * ret, size_t * ret_size, unsigned int * criti‐
       cal);

ARGUMENTS
       gnutls_x509_crt_t cert
		   should contain a gnutls_x509_crt_t structure

       unsigned int seq
		   specifies the sequence number of the alt name  (0  for  the
		   first one, 1 for the second etc.)

       void * ret  is the place where the alternative name will be copied to

       size_t * ret_size
		   holds the size of ret.

       unsigned int * critical
		   will	 be  non  zero	if the extension is marked as critical
		   (may be null)

DESCRIPTION
       This function will return the alternative names, contained in the given
       certificate.

       This is specified in X509v3 Certificate Extensions.  GNUTLS will return
       the Alternative name (2.5.29.17), or a negative error code.

       Returns GNUTLS_E_SHORT_MEMORY_BUFFER if &ret_size is not enough to hold
       the alternative name. In that case &ret_size will be updated. If every‐
       thing was ok the type of alternative name is returned. The type is  one
       of the enumerated gnutls_x509_subject_alt_name_t.

       If the certificate does not have an Alternative name with the specified
       sequence number then returns GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;

REPORTING BUGS
       Report bugs to <bug-gnutls@gnu.org>.

COPYRIGHT
       Copyright © 2004 Free Software Foundation.
       Permission is granted to make and distribute verbatim  copies  of  this
       manual  provided	 the  copyright	 notice and this permission notice are
       preserved on all copies.

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				     1.gnutls_x509_crt_get_subject_alt_name(3)
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