Beispiel #1
0
    def generate(self, state):
        if self.version is None:
            self.version = state.client_version
        if self.random:
            state.client_random = self.random
        if self.session_id is None:
            self.session_id = state.session_id
        if not state.client_random:
            state.client_random = bytearray(32)

        extensions = None
        if self.extensions is not None:
            extensions = self._generate_extensions(state)

        clnt_hello = ClientHello(self.ssl2).create(self.version,
                                                   state.client_random,
                                                   self.session_id,
                                                   self.ciphers,
                                                   extensions=extensions)
        clnt_hello.compression_methods = self.compression
        state.client_version = self.version

        self.msg = clnt_hello

        return clnt_hello
Beispiel #2
0
    def generate(self, state):
        if self.version is None:
            self.version = state.client_version
        if self.random:
            state.client_random = self.random
        if self.session_id is None:
            self.session_id = state.session_id
        if not state.client_random:
            state.client_random = bytearray(32)

        extensions = None
        if self.extensions is not None:
            extensions = self._generate_extensions(state)

        clnt_hello = ClientHello().create(self.version,
                                          state.client_random,
                                          self.session_id,
                                          self.ciphers,
                                          extensions=extensions)
        clnt_hello.compression_methods = self.compression
        state.client_version = self.version

        self.msg = clnt_hello

        return clnt_hello
Beispiel #3
0
    def __call__(self, hostname):
        """Generate a client hello object, use hostname in SNI extension."""
        # SNI is special in that we don't want to send it if it is empty
        if self.extensions:
            sni = next((x for x in self.extensions
                        if isinstance(x, SNIExtension)),
                       None)
            if sni:
                if hostname is not None:
                    if sni.serverNames is None:
                        sni.serverNames = []
                    sni.hostNames = [hostname]
                else:
                    # but if we were not provided with a host name, we want
                    # to remove empty extension
                    if sni.serverNames is None:
                        self.extensions = [x for x in self.extensions
                                           if not isinstance(x, SNIExtension)]

        if self.random:
            rand = self.random
        else:
            # we're not doing any crypto with it, just need "something"
            # TODO: place unix time at the beginning
            rand = numberToByteArray(random.getrandbits(256), 32)

        ch = ClientHello(self.ssl2).create(self.version, rand, self.session_id,
                                           self.ciphers,
                                           extensions=self.extensions)
        ch.compression_methods = self.compression_methods
        for cb in self.callbacks:
            ch = cb(ch)
        return ch
Beispiel #4
0
    def __call__(self, hostname):
        """Generate a client hello object, use hostname in SNI extension."""
        # SNI is special in that we don't want to send it if it is empty
        if self.extensions:
            sni = next(
                (x for x in self.extensions if isinstance(x, SNIExtension)),
                None)
            if sni:
                if hostname is not None:
                    if sni.serverNames is None:
                        sni.serverNames = []
                    sni.hostNames = [hostname]
                else:
                    # but if we were not provided with a host name, we want
                    # to remove empty extension
                    if sni.serverNames is None:
                        self.extensions = [
                            x for x in self.extensions
                            if not isinstance(x, SNIExtension)
                        ]

        if self.random:
            rand = self.random
        else:
            # we're not doing any crypto with it, just need "something"
            # TODO: place unix time at the beginning
            rand = numberToByteArray(random.getrandbits(256), 32)

        ch = ClientHello(self.ssl2).create(self.version,
                                           rand,
                                           self.session_id,
                                           self.ciphers,
                                           extensions=self.extensions)
        ch.compression_methods = self.compression_methods
        for cb in self.callbacks:
            ch = cb(ch)
        return ch