gnutls_x509_crt_get_subject_alt_name — Get certificate's alternative name, if any
#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 * | critical); |
should contain a gnutls_x509_crt_t structure
specifies the sequence number of the alt name (0 for the first one, 1 for the second etc.)
is the place where the alternative name will be copied to
holds the size of ret.
will be non zero if the extension is marked as critical (may be null)
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.
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_othername_oid()
to get the corresponding 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 yourself. Currently, only the RFC 3920 id−on−xmppAddr SAN is recognized.
Returns the alternative subject name type on success. The
type is one of the enumerated gnutls_x509_subject_alt_name_t.
It will return GNUTLS_E_SHORT_MEMORY_BUFFER if ret_size is not large enough to
hold the value. In that case ret_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.
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.
| COPYRIGHT |
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Copyright © 2008 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. |