Provided by: gnutls-doc_3.4.10-4ubuntu1.9_all 
NAME
gnutls_x509_crt_get_authority_info_access - API function
SYNOPSIS
#include <gnutls/x509.h>
int gnutls_x509_crt_get_authority_info_access(gnutls_x509_crt_t crt, unsigned int seq, int
what, gnutls_datum_t * data, unsigned int * critical);
ARGUMENTS
gnutls_x509_crt_t crt
Holds the certificate
unsigned int seq
specifies the sequence number of the access descriptor (0 for the first one, 1
for the second etc.)
int what what data to get, a gnutls_info_access_what_t type.
gnutls_datum_t * data
output data to be freed with gnutls_free().
unsigned int * critical
pointer to output integer that is set to non-zero if the extension is marked
as critical (may be NULL)
DESCRIPTION
Note that a simpler API to access the authority info data is provided by
gnutls_x509_aia_get() and gnutls_x509_ext_import_aia().
This function extracts the Authority Information Access (AIA) extension, see RFC 5280
section 4.2.2.1 for more information. The AIA extension holds a sequence of
AccessDescription (AD) data.
The seq input parameter is used to indicate which member of the sequence the caller is
interested in. The first member is 0, the second member 1 and so on. When the seq value
is out of bounds, GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.
The type of data returned in data is specified via what which should be
gnutls_info_access_what_t values.
If what is GNUTLS_IA_ACCESSMETHOD_OID then data will hold the accessMethod OID (e.g.,
"1.3.6.1.5.5.7.48.1").
If what is GNUTLS_IA_ACCESSLOCATION_GENERALNAME_TYPE, data will hold the accessLocation
GeneralName type (e.g., "uniformResourceIdentifier").
If what is GNUTLS_IA_URI, data will hold the accessLocation URI data. Requesting this
what value leads to an error if the accessLocation is not of the
"uniformResourceIdentifier" type.
If what is GNUTLS_IA_OCSP_URI, data will hold the OCSP URI. Requesting this what value
leads to an error if the accessMethod is not 1.3.6.1.5.5.7.48.1 aka OSCP, or if
accessLocation is not of the "uniformResourceIdentifier" type. In that case
GNUTLS_E_UNKNOWN_ALGORITHM will be returned, and seq should be increased and this
function called again.
If what is GNUTLS_IA_CAISSUERS_URI, data will hold the caIssuers URI. Requesting this
what value leads to an error if the accessMethod is not 1.3.6.1.5.5.7.48.2 aka caIssuers,
or if accessLocation is not of the "uniformResourceIdentifier" type. In that case handle
as in GNUTLS_IA_OCSP_URI.
More what values may be allocated in the future as needed.
If data is NULL, the function does the same without storing the output data, that is, it
will set critical and do error checking as usual.
The value of the critical flag is returned in * critical . Supply a NULL critical if you
want the function to make sure the extension is non-critical, as required by RFC 5280.
RETURNS
GNUTLS_E_SUCCESS on success, GNUTLS_E_INVALID_REQUEST on invalid crt ,
GNUTLS_E_CONSTRAINT_ERROR if the extension is incorrectly marked as critical (use a
non-NULL critical to override), GNUTLS_E_UNKNOWN_ALGORITHM if the requested OID does not
match (e.g., when using GNUTLS_IA_OCSP_URI), otherwise a negative error code.
SINCE
3.0
REPORTING BUGS
Report bugs to <bugs@gnutls.org>.
Home page: http://www.gnutls.org
COPYRIGHT
Copyright © 2001-2021 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/