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fc1b6d6de2
This commit offers an option to encrypt and authenticate all messaging,
including the neighbor discovery messages. The currently most advanced
algorithm supported is the AEAD AES-GCM (like IPSec or TLS). All
encryption/decryption is done at the bearer layer, just before leaving
or after entering TIPC.
Supported features:
- Encryption & authentication of all TIPC messages (header + data);
- Two symmetric-key modes: Cluster and Per-node;
- Automatic key switching;
- Key-expired revoking (sequence number wrapped);
- Lock-free encryption/decryption (RCU);
- Asynchronous crypto, Intel AES-NI supported;
- Multiple cipher transforms;
- Logs & statistics;
Two key modes:
- Cluster key mode: One single key is used for both TX & RX in all
nodes in the cluster.
- Per-node key mode: Each nodes in the cluster has one specific TX key.
For RX, a node requires its peers' TX key to be able to decrypt the
messages from those peers.
Key setting from user-space is performed via netlink by a user program
(e.g. the iproute2 'tipc' tool).
Internal key state machine:
Attach Align(RX)
+-+ +-+
| V | V
+---------+ Attach +---------+
| IDLE |---------------->| PENDING |(user = 0)
+---------+ +---------+
A A Switch| A
| | | |
| | Free(switch/revoked) | |
(Free)| +----------------------+ | |Timeout
| (TX) | | |(RX)
| | | |
| | v |
+---------+ Switch +---------+
| PASSIVE |<----------------| ACTIVE |
+---------+ (RX) +---------+
(user = 1) (user >= 1)
The number of TFMs is 10 by default and can be changed via the procfs
'net/tipc/max_tfms'. At this moment, as for simplicity, this file is
also used to print the crypto statistics at runtime:
echo 0xfff1 > /proc/sys/net/tipc/max_tfms
The patch defines a new TIPC version (v7) for the encryption message (-
backward compatibility as well). The message is basically encapsulated
as follows:
+----------------------------------------------------------+
| TIPCv7 encryption | Original TIPCv2 | Authentication |
| header | packet (encrypted) | Tag |
+----------------------------------------------------------+
The throughput is about ~40% for small messages (compared with non-
encryption) and ~9% for large messages. With the support from hardware
crypto i.e. the Intel AES-NI CPU instructions, the throughput increases
upto ~85% for small messages and ~55% for large messages.
By default, the new feature is inactive (i.e. no encryption) until user
sets a key for TIPC. There is however also a new option - "TIPC_CRYPTO"
in the kernel configuration to enable/disable the new code when needed.
MAINTAINERS | add two new files 'crypto.h' & 'crypto.c' in tipc
Acked-by: Ying Xue <ying.xue@windreiver.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
124 lines
5.5 KiB
C
124 lines
5.5 KiB
C
/*
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* net/tipc/node.h: Include file for TIPC node management routines
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*
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* Copyright (c) 2000-2006, 2014-2016, Ericsson AB
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* Copyright (c) 2005, 2010-2014, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TIPC_NODE_H
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#define _TIPC_NODE_H
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#include "addr.h"
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#include "net.h"
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#include "bearer.h"
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#include "msg.h"
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/* Optional capabilities supported by this code version
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*/
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enum {
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TIPC_SYN_BIT = (1),
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TIPC_BCAST_SYNCH = (1 << 1),
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TIPC_BCAST_STATE_NACK = (1 << 2),
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TIPC_BLOCK_FLOWCTL = (1 << 3),
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TIPC_BCAST_RCAST = (1 << 4),
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TIPC_NODE_ID128 = (1 << 5),
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TIPC_LINK_PROTO_SEQNO = (1 << 6),
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TIPC_MCAST_RBCTL = (1 << 7),
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TIPC_GAP_ACK_BLOCK = (1 << 8),
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TIPC_TUNNEL_ENHANCED = (1 << 9),
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TIPC_NAGLE = (1 << 10)
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};
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#define TIPC_NODE_CAPABILITIES (TIPC_SYN_BIT | \
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TIPC_BCAST_SYNCH | \
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TIPC_BCAST_STATE_NACK | \
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TIPC_BCAST_RCAST | \
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TIPC_BLOCK_FLOWCTL | \
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TIPC_NODE_ID128 | \
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TIPC_LINK_PROTO_SEQNO | \
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TIPC_MCAST_RBCTL | \
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TIPC_GAP_ACK_BLOCK | \
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TIPC_TUNNEL_ENHANCED | \
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TIPC_NAGLE)
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#define INVALID_BEARER_ID -1
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void tipc_node_stop(struct net *net);
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bool tipc_node_get_id(struct net *net, u32 addr, u8 *id);
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u32 tipc_node_get_addr(struct tipc_node *node);
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char *tipc_node_get_id_str(struct tipc_node *node);
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void tipc_node_put(struct tipc_node *node);
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struct tipc_node *tipc_node_create(struct net *net, u32 addr, u8 *peer_id,
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u16 capabilities, u32 hash_mixes,
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bool preliminary);
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#ifdef CONFIG_TIPC_CRYPTO
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struct tipc_crypto *tipc_node_crypto_rx(struct tipc_node *__n);
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struct tipc_crypto *tipc_node_crypto_rx_by_list(struct list_head *pos);
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#endif
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u32 tipc_node_try_addr(struct net *net, u8 *id, u32 addr);
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void tipc_node_check_dest(struct net *net, u32 onode, u8 *peer_id128,
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struct tipc_bearer *bearer,
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u16 capabilities, u32 signature, u32 hash_mixes,
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struct tipc_media_addr *maddr,
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bool *respond, bool *dupl_addr);
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void tipc_node_delete_links(struct net *net, int bearer_id);
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void tipc_node_apply_property(struct net *net, struct tipc_bearer *b, int prop);
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int tipc_node_get_linkname(struct net *net, u32 bearer_id, u32 node,
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char *linkname, size_t len);
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int tipc_node_xmit(struct net *net, struct sk_buff_head *list, u32 dnode,
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int selector);
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int tipc_node_distr_xmit(struct net *net, struct sk_buff_head *list);
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int tipc_node_xmit_skb(struct net *net, struct sk_buff *skb, u32 dest,
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u32 selector);
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void tipc_node_subscribe(struct net *net, struct list_head *subscr, u32 addr);
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void tipc_node_unsubscribe(struct net *net, struct list_head *subscr, u32 addr);
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void tipc_node_broadcast(struct net *net, struct sk_buff *skb);
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int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port);
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void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port);
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int tipc_node_get_mtu(struct net *net, u32 addr, u32 sel, bool connected);
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bool tipc_node_is_up(struct net *net, u32 addr);
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u16 tipc_node_get_capabilities(struct net *net, u32 addr);
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int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb);
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int tipc_nl_node_dump_link(struct sk_buff *skb, struct netlink_callback *cb);
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int tipc_nl_node_reset_link_stats(struct sk_buff *skb, struct genl_info *info);
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int tipc_nl_node_get_link(struct sk_buff *skb, struct genl_info *info);
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int tipc_nl_node_set_link(struct sk_buff *skb, struct genl_info *info);
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int tipc_nl_peer_rm(struct sk_buff *skb, struct genl_info *info);
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int tipc_nl_node_set_monitor(struct sk_buff *skb, struct genl_info *info);
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int tipc_nl_node_get_monitor(struct sk_buff *skb, struct genl_info *info);
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int tipc_nl_node_dump_monitor(struct sk_buff *skb, struct netlink_callback *cb);
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int tipc_nl_node_dump_monitor_peer(struct sk_buff *skb,
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struct netlink_callback *cb);
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void tipc_node_pre_cleanup_net(struct net *exit_net);
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#endif
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