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int gnutls_x509_crt_get_issuer_alt_name(gnutls_x509_crt_t cert,
unsigned int seq, void * ian, size_t * ian_size, unsigned int * criti-
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)
This function retrieves the Issuer Alternative Name (188.8.131.52), con-
tained 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 Issuer AltName is
the alternative issuer name type on success, one of the enumerated
gnutls_x509_subject_alt_name_t. It will return GNUTLS_E_SHORT_MEM-
ORY_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 certifi-
cate does not have an Alternative name with the specified sequence num-
ber then GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.
Report bugs to <email@example.com>.
Home page: http://www.gnutls.org