gnutls_x509_crt_get_authority_info_access - API function

       #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 *

       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)

       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 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,

       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., "").

       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 aka OCSP, 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

       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 aka caIssuers, or if accessLocation is not of the
       "uniformResourceIdentifier" type.  In that case handle as in

       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.

       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.


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gnutls                              gnutls3x509_crt_get_authority_info_access(3)