proxylib.py 文件源码

def openssl_set_session_cache_mode(context, mode):
    assert isinstance(context, OpenSSL.SSL.Context)
    try:
        import ctypes
        SSL_CTRL_SET_SESS_CACHE_MODE = 44
        SESS_CACHE_OFF = 0x0
        SESS_CACHE_CLIENT = 0x1
        SESS_CACHE_SERVER = 0x2
        SESS_CACHE_BOTH = 0x3
        c_mode = {'off':SESS_CACHE_OFF, 'client':SESS_CACHE_CLIENT, 'server':SESS_CACHE_SERVER, 'both':SESS_CACHE_BOTH}[mode.lower()]
        if hasattr(context, 'set_session_cache_mode'):
            context.set_session_cache_mode(c_mode)
        elif OpenSSL.__version__ == '0.13':
            # http://bazaar.launchpad.net/~exarkun/pyopenssl/release-0.13/view/head:/OpenSSL/ssl/context.h#L27
            c_context = ctypes.c_void_p.from_address(id(context)+ctypes.sizeof(ctypes.c_int)+ctypes.sizeof(ctypes.c_voidp))
            if os.name == 'nt':
                # https://github.com/openssl/openssl/blob/92c78463720f71e47c251ffa58493e32cd793e13/ssl/ssl.h#L884
                ctypes.c_int.from_address(c_context.value+ctypes.sizeof(ctypes.c_voidp)*7+ctypes.sizeof(ctypes.c_ulong)).value = c_mode
            else:
                import ctypes.util
                # FIXME
                # ctypes.cdll.LoadLibrary(ctypes.util.find_library('ssl')).SSL_CTX_ctrl(c_context, SSL_CTRL_SET_SESS_CACHE_MODE, c_mode, None)
    except Exception as e:
        logging.warning('openssl_set_session_cache_mode failed: %r', e)