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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 type

       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 (C) 2001-2017 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

       http://www.gnutls.org/manual/

gnutls				    3.5gnutls_x509_crt_get_subject_alt_name(3)

NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURNS | REPORTING BUGS | COPYRIGHT | SEE ALSO

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