gnutls_x509_crt_get_subject_alt_name man page on Archlinux

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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 - API function

SYNOPSIS
       #include <gnutls/x509.h>

       int     gnutls_x509_crt_get_subject_alt_name(gnutls_x509_crt_t	 cert,
       unsigned int seq, void * san, size_t * san_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 * san  is the place where the alternative name will be copied to

       size_t * san_size
		   holds the size of san.

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

DESCRIPTION
       This  function retrieves the Alternative Name (2.5.29.17), contained in
       the given certificate in the X509v3 Certificate Extensions.

       When the SAN type is otherName, it will extract the data in the	other‐
       Name's  value field, and GNUTLS_SAN_OTHERNAME is returned.  You may use
       gnutls_x509_crt_get_subject_alt_othername_oid() to get the  correspond‐
       ing OID and the "virtual" SAN types (e.g., GNUTLS_SAN_OTHERNAME_XMPP).

       If  an otherName OID is known, the data will be decoded.	 Otherwise the
       returned data will be DER encoded, and you will have to decode it your‐
       self.  Currently, only the RFC 3920 id-on-xmppAddr SAN is recognized.

RETURNS
       the  alternative	 subject  name	type on success, one of the enumerated
       gnutls_x509_subject_alt_name_t.	 It  will  return  GNUTLS_E_SHORT_MEM‐
       ORY_BUFFER if  san_size is not large enough to hold the value.  In that
       case  san_size will be updated with the required size.  If the certifi‐
       cate does not have an Alternative name with the specified sequence num‐
       ber then GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.

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

COPYRIGHT
       Copyright © 2001-2014 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.

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/

gnutls				     3.gnutls_x509_crt_get_subject_alt_name(3)
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