@deftypefun {int} {gnutls_certificate_verify_peers2} (gnutls_session_t @var{session}, unsigned int * @var{status})

@var{session}: is a gnutls session

@var{status}: is the output of the verification

This function will verify the peer's certificate and store

the status in the  @code{status} variable as a bitwise OR of gnutls_certificate_status_t

values or zero if the certificate is trusted. Note that value in  @code{status} is set only when the return value of this function is success (i.e, failure 

to trust a certificate does not imply a negative return value).

The default verification flags used by this function can be overridden

using @code{gnutls_certificate_set_verify_flags()} .

This function will take into account the stapled OCSP responses sent by the server,

as well as the following X.509 certificate extensions: Name Constraints,

Key Usage, and Basic Constraints (pathlen).

Note that you must also check the peer's name in order to check if

the verified certificate belongs to the actual peer, see @code{gnutls_x509_crt_check_hostname()} ,

or use @code{gnutls_certificate_verify_peers3()} .

To avoid denial of service attacks some

default upper limits regarding the certificate key size and chain

size are set. To override them use @code{gnutls_certificate_set_verify_limits()} .

Note that when using raw public-keys verification will not work because there is

no corresponding certificate body belonging to the raw key that can be verified. In that

case this function will return @code{GNUTLS_E_INVALID_REQUEST} .

@strong{Returns:} @code{GNUTLS_E_SUCCESS}  (0) when the validation is performed, or a negative error code otherwise.

A successful error code means that the  @code{status} parameter must be checked to obtain the validation status.

@end deftypefun