How to use the nassl.SslClient.SslClient function in nassl

# Let's try to open the cert and key files
        if args_command_list.cert:
            try:
                open(args_command_list.cert,"r")
            except:
                raise CommandLineParsingError('Could not open the client certificate file "' + str(args_command_list.cert) + '".')

        if args_command_list.key:
            try:
                open(args_command_list.key,"r")
            except:
                raise CommandLineParsingError('Could not open the client private key file "' + str(args_command_list.key) + '"')

            # Try to load the cert and key in OpenSSL
            try:
                sslClient = SslClient()
                sslClient.use_private_key(args_command_list.cert,
                                        args_command_list.certform,
                                        args_command_list.key,
                                        args_command_list.keyform,
                                        args_command_list.keypass)
            except _nassl.OpenSSLError as e:
                if 'bad decrypt' in str(e.args):
                    raise CommandLineParsingError('Could not decrypt the private key. Wrong passphrase ?')
                raise CommandLineParsingError('Could not load the certificate or the private key. Passphrase needed ?')



        # HTTP CONNECT proxy
        shared_settings['https_tunnel_host'] = None
        if args_command_list.https_tunnel:

def process_task(self, target, command, args):

        MAX_THREADS = 30
        sslVersionDict = {'sslv2': SSLV2,
                       'sslv3': SSLV3,
                       'tlsv1': TLSV1,
                       'tlsv1_1': TLSV1_1,
                       'tlsv1_2': TLSV1_2}
        try:
            sslVersion = sslVersionDict[command]
        except KeyError:
            raise Exception("PluginOpenSSLCipherSuites: Unknown command.")

        # Get the list of available cipher suites for the given ssl version
        sslClient = SslClient(sslVersion=sslVersion)
        sslClient.set_cipher_list('ALL:COMPLEMENTOFALL')
        cipher_list = sslClient.get_cipher_list()

        # Create a thread pool
        NB_THREADS = min(len(cipher_list), MAX_THREADS) # One thread per cipher
        thread_pool = ThreadPool()

        # Scan for every available cipher suite
        for cipher in cipher_list:
            thread_pool.add_job((self._test_ciphersuite,
                                 (target, sslVersion, cipher)))

        # Scan for the preferred cipher suite
        thread_pool.add_job((self._pref_ciphersuite,
                             (target, sslVersion)))

def process_task(self, target, command, args):

        MAX_THREADS = 15
        sslVersionDict = {'sslv2': SSLV2,
                       'sslv3': SSLV3,
                       'tlsv1': TLSV1,
                       'tlsv1_1': TLSV1_1,
                       'tlsv1_2': TLSV1_2}
        try:
            sslVersion = sslVersionDict[command]
        except KeyError:
            raise Exception("PluginOpenSSLCipherSuites: Unknown command.")

        # Get the list of available cipher suites for the given ssl version
        sslClient = SslClient(sslVersion=sslVersion)
        sslClient.set_cipher_list('ALL:COMPLEMENTOFALL')
        cipher_list = sslClient.get_cipher_list()

        # Create a thread pool
        NB_THREADS = min(len(cipher_list), MAX_THREADS) # One thread per cipher
        thread_pool = ThreadPool()

        # Scan for every available cipher suite
        for cipher in cipher_list:
            thread_pool.add_job((self._test_ciphersuite,
                                 (target, sslVersion, cipher)))

        # Scan for the preferred cipher suite
        thread_pool.add_job((self._pref_ciphersuite,
                             (target, sslVersion)))

ERROR_MSG = 'Server requested a client certificate signed by one of the ' +\
    'following CAs: {0}; use the --cert and --key options.'
    
    
    def __init__(self, caList):
        self.caList = caList
        
    def __str__(self):
        caListStr = ''
        for ca in self.caList:
            caListStr += ca + ' '
        return self.ERROR_MSG.format(caListStr)



class SSLConnection(SslClient):
    """Base SSL connection class."""

    # The following errors mean that the server explicitly rejected the 
    # handshake. The goal to differentiate rejected handshakes from random 
    # network errors such as the server going offline, etc.
    HANDSHAKE_REJECTED_SOCKET_ERRORS = \
        {'was forcibly closed' : 'Received FIN',
         'reset by peer' : 'Received RST'}
        
    HANDSHAKE_REJECTED_SSL_ERRORS = \
        {'sslv3 alert handshake failure' : 'Alert handshake failure',
         'no ciphers available' : 'No ciphers available',
         'excessive message size' : 'Excessive message size',
         'bad mac decode' : 'Bad mac decode',
         'wrong version number' : 'Wrong version number',
         'no cipher match' : 'No cipher match',