PRELIMINARY
SYNOPSIS
        mixed *tls_check_certificate(object obj);
        mixed *tls_check_certificate(object obj, int extra);

DESCRIPTION
        tls_check_certificate() checks the certificate of the secured
        connection bound to <obj> (default is the current object).  If
        <obj> is not interactive, or if TLS is not available, an error
        is thrown.

        If <obj> doesn't have a secure connection up and running, an
        error is thrown.
        Otherwise, the result is an array with these values:

          int [0]      : Result code of SSL_get_verify_result (see man 1 verify
                         subsection DIAGNOSTICS for possible values)
          array [1]    : array with 3*n entries of extra x509 data.
                         structure is:
                            3*i    : numerical form of object name,
                                     e.g. "2.5.4.3"
                            3*i + 1: long or short name if available,
                                     e.g. "commonName"
                            3*i + 2: value
          array [2]    : if extra is set:
                            array with 3*n entries of x509 extension data
                            data structure is:
                            3*i    : numerical form of extension name
                            3*i + 1: long or short name of extension
                                     name if available
                            3*i + 2: array of strings with the data
                                     structure of [1]

        Note: a x509 certificate can have more than one object with
        the same name

BUGS
        Not supported when using GnuTLS.

HISTORY
        Introduced in LDMud 3.3.672/3.2.11.
        LDMud 3.3.711/3.2.12 modified the behaviour to return the
        low-level API result value, and to throw an error if the connection
        is not secure.

SEE ALSO
        tls_init_connection(E), tls_deinit_connection(E), tls_error(E),
        tls_query_connection_state(E), tls_query_connection_info(E),
        tls_available(E), tls_refresh_certs(E), mudlib/psyc-tls.c