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gnutls_x509_crt_get_issuer_alt_name(3)	      gnutls	   gnutls_x509_crt_get_issuer_alt_name(3)

NAME
       gnutls_x509_crt_get_issuer_alt_name - API function

SYNOPSIS
       #include <gnutls/x509.h>

       int  gnutls_x509_crt_get_issuer_alt_name(gnutls_x509_crt_t  cert, unsigned int seq, void *
       ian, size_t * ian_size, unsigned int * critical);

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 * ian  is the place where the alternative name will be copied to

       size_t * ian_size
		   holds the size of ian.

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

DESCRIPTION
       This  function  retrieves  the Issuer Alternative Name (2.5.29.18), contained in the given
       certificate in the X509v3 Certificate Extensions.

       When the SAN type is otherName, it will extract the data in the otherName's  value  field,
       and  GNUTLS_SAN_OTHERNAME is returned.  You may use gnutls_x509_crt_get_subject_alt_other-
       name_oid() to get the corresponding OID and the "virtual" SAN types (e.g., GNUTLS_SAN_OTH-
       ERNAME_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 yourself.  Currently,  only  the	RFC  3920
       id-on-xmppAddr Issuer AltName is recognized.

RETURNS
       the  alternative  issuer  name  type  on  success,  one of the enumerated gnutls_x509_sub-
       ject_alt_name_t.  It will return GNUTLS_E_SHORT_MEMORY_BUFFER if  ian_size  is  not  large
       enough  to hold the value.  In that case  ian_size will be updated with the required size.
       If the certificate does not have an Alternative name with the  specified  sequence  number
       then GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.

SINCE
       2.10.0

REPORTING BUGS
       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
       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.

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.	As an alternative you may obtain the man-
       ual from:

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

gnutls					      3.1.15	   gnutls_x509_crt_get_issuer_alt_name(3)
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