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@deftypefun {int} {gnutls_certificate_set_x509_trust_file} (gnutls_certificate_credentials_t @var{cred}, const char * @var{cafile}, gnutls_x509_crt_fmt_t @var{type})
@var{cred}: is a @code{gnutls_certificate_credentials_t} structure.
@var{cafile}: is a file containing the list of trusted CAs (DER or PEM list)
@var{type}: is PEM or DER
This function adds the trusted CAs in order to verify client or
server certificates. In case of a client this is not required to
be called if the certificates are not verified using
@code{gnutls_certificate_verify_peers2()} . This function may be called
multiple times.
In case of a server the names of the CAs set here will be sent to
the client if a certificate request is sent. This can be disabled
using @code{gnutls_certificate_send_x509_rdn_sequence()} .
This function can also accept URLs. In that case it
will import all certificates that are marked as trusted. Note
that the supported URLs are the ones indicated by @code{gnutls_url_is_supported()} .
@strong{Returns:} the number of certificates processed
@end deftypefun
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