1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* !! 2 /**
3 * net/tipc/crypto.c: TIPC crypto for key hand 3 * net/tipc/crypto.c: TIPC crypto for key handling & packet en/decryption
4 * 4 *
5 * Copyright (c) 2019, Ericsson AB 5 * Copyright (c) 2019, Ericsson AB
6 * All rights reserved. 6 * All rights reserved.
7 * 7 *
8 * Redistribution and use in source and binary 8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that t 9 * modification, are permitted provided that the following conditions are met:
10 * 10 *
11 * 1. Redistributions of source code must reta 11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the 12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must repr 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials pro 15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holde 16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or p 17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior wri 18 * this software without specific prior written permission.
19 * 19 *
20 * Alternatively, this software may be distrib 20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation. 22 * Software Foundation.
23 * 23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCL 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND F 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYR 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT L 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THE 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUD 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS S 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE. 34 * POSSIBILITY OF SUCH DAMAGE.
35 */ 35 */
36 36
37 #include <crypto/aead.h> 37 #include <crypto/aead.h>
38 #include <crypto/aes.h> 38 #include <crypto/aes.h>
39 #include <crypto/rng.h> 39 #include <crypto/rng.h>
40 #include "crypto.h" 40 #include "crypto.h"
41 #include "msg.h" 41 #include "msg.h"
42 #include "bcast.h" 42 #include "bcast.h"
43 43
44 #define TIPC_TX_GRACE_PERIOD msecs_to_jiffi 44 #define TIPC_TX_GRACE_PERIOD msecs_to_jiffies(5000) /* 5s */
45 #define TIPC_TX_LASTING_TIME msecs_to_jiffi 45 #define TIPC_TX_LASTING_TIME msecs_to_jiffies(10000) /* 10s */
46 #define TIPC_RX_ACTIVE_LIM msecs_to_jiffi 46 #define TIPC_RX_ACTIVE_LIM msecs_to_jiffies(3000) /* 3s */
47 #define TIPC_RX_PASSIVE_LIM msecs_to_jiffi 47 #define TIPC_RX_PASSIVE_LIM msecs_to_jiffies(15000) /* 15s */
48 48
49 #define TIPC_MAX_TFMS_DEF 10 49 #define TIPC_MAX_TFMS_DEF 10
50 #define TIPC_MAX_TFMS_LIM 1000 50 #define TIPC_MAX_TFMS_LIM 1000
51 51
52 #define TIPC_REKEYING_INTV_DEF (60 * 24) /* d 52 #define TIPC_REKEYING_INTV_DEF (60 * 24) /* default: 1 day */
53 53
54 /* !! 54 /**
55 * TIPC Key ids 55 * TIPC Key ids
56 */ 56 */
57 enum { 57 enum {
58 KEY_MASTER = 0, 58 KEY_MASTER = 0,
59 KEY_MIN = KEY_MASTER, 59 KEY_MIN = KEY_MASTER,
60 KEY_1 = 1, 60 KEY_1 = 1,
61 KEY_2, 61 KEY_2,
62 KEY_3, 62 KEY_3,
63 KEY_MAX = KEY_3, 63 KEY_MAX = KEY_3,
64 }; 64 };
65 65
66 /* !! 66 /**
67 * TIPC Crypto statistics 67 * TIPC Crypto statistics
68 */ 68 */
69 enum { 69 enum {
70 STAT_OK, 70 STAT_OK,
71 STAT_NOK, 71 STAT_NOK,
72 STAT_ASYNC, 72 STAT_ASYNC,
73 STAT_ASYNC_OK, 73 STAT_ASYNC_OK,
74 STAT_ASYNC_NOK, 74 STAT_ASYNC_NOK,
75 STAT_BADKEYS, /* tx only */ 75 STAT_BADKEYS, /* tx only */
76 STAT_BADMSGS = STAT_BADKEYS, /* rx onl 76 STAT_BADMSGS = STAT_BADKEYS, /* rx only */
77 STAT_NOKEYS, 77 STAT_NOKEYS,
78 STAT_SWITCHES, 78 STAT_SWITCHES,
79 79
80 MAX_STATS, 80 MAX_STATS,
81 }; 81 };
82 82
83 /* TIPC crypto statistics' header */ 83 /* TIPC crypto statistics' header */
84 static const char *hstats[MAX_STATS] = {"ok", 84 static const char *hstats[MAX_STATS] = {"ok", "nok", "async", "async_ok",
85 "async 85 "async_nok", "badmsgs", "nokeys",
86 "switc 86 "switches"};
87 87
88 /* Max TFMs number per key */ 88 /* Max TFMs number per key */
89 int sysctl_tipc_max_tfms __read_mostly = TIPC_ 89 int sysctl_tipc_max_tfms __read_mostly = TIPC_MAX_TFMS_DEF;
90 /* Key exchange switch, default: on */ 90 /* Key exchange switch, default: on */
91 int sysctl_tipc_key_exchange_enabled __read_mo 91 int sysctl_tipc_key_exchange_enabled __read_mostly = 1;
92 92
93 /* !! 93 /**
94 * struct tipc_key - TIPC keys' status indicat 94 * struct tipc_key - TIPC keys' status indicator
95 * 95 *
96 * 7 6 5 4 3 2 96 * 7 6 5 4 3 2 1 0
97 * +-----+-----+-----+-----+-----+-----+- 97 * +-----+-----+-----+-----+-----+-----+-----+-----+
98 * key: | (reserved)|passive idx| active idx|p 98 * key: | (reserved)|passive idx| active idx|pending idx|
99 * +-----+-----+-----+-----+-----+-----+- 99 * +-----+-----+-----+-----+-----+-----+-----+-----+
100 */ 100 */
101 struct tipc_key { 101 struct tipc_key {
102 #define KEY_BITS (2) 102 #define KEY_BITS (2)
103 #define KEY_MASK ((1 << KEY_BITS) - 1) 103 #define KEY_MASK ((1 << KEY_BITS) - 1)
104 union { 104 union {
105 struct { 105 struct {
106 #if defined(__LITTLE_ENDIAN_BITFIELD) 106 #if defined(__LITTLE_ENDIAN_BITFIELD)
107 u8 pending:2, 107 u8 pending:2,
108 active:2, 108 active:2,
109 passive:2, /* rx on 109 passive:2, /* rx only */
110 reserved:2; 110 reserved:2;
111 #elif defined(__BIG_ENDIAN_BITFIELD) 111 #elif defined(__BIG_ENDIAN_BITFIELD)
112 u8 reserved:2, 112 u8 reserved:2,
113 passive:2, /* rx on 113 passive:2, /* rx only */
114 active:2, 114 active:2,
115 pending:2; 115 pending:2;
116 #else 116 #else
117 #error "Please fix <asm/byteorder.h>" 117 #error "Please fix <asm/byteorder.h>"
118 #endif 118 #endif
119 } __packed; 119 } __packed;
120 u8 keys; 120 u8 keys;
121 }; 121 };
122 }; 122 };
123 123
124 /** 124 /**
125 * struct tipc_tfm - TIPC TFM structure to for 125 * struct tipc_tfm - TIPC TFM structure to form a list of TFMs
126 * @tfm: cipher handle/key <<
127 * @list: linked list of TFMs <<
128 */ 126 */
129 struct tipc_tfm { 127 struct tipc_tfm {
130 struct crypto_aead *tfm; 128 struct crypto_aead *tfm;
131 struct list_head list; 129 struct list_head list;
132 }; 130 };
133 131
134 /** 132 /**
135 * struct tipc_aead - TIPC AEAD key structure 133 * struct tipc_aead - TIPC AEAD key structure
136 * @tfm_entry: per-cpu pointer to one entry in 134 * @tfm_entry: per-cpu pointer to one entry in TFM list
137 * @crypto: TIPC crypto owns this key 135 * @crypto: TIPC crypto owns this key
138 * @cloned: reference to the source key in cas 136 * @cloned: reference to the source key in case cloning
139 * @users: the number of the key users (TX/RX) 137 * @users: the number of the key users (TX/RX)
140 * @salt: the key's SALT value 138 * @salt: the key's SALT value
141 * @authsize: authentication tag size (max = 1 139 * @authsize: authentication tag size (max = 16)
142 * @mode: crypto mode is applied to the key 140 * @mode: crypto mode is applied to the key
143 * @hint: a hint for user key !! 141 * @hint[]: a hint for user key
144 * @rcu: struct rcu_head 142 * @rcu: struct rcu_head
145 * @key: the aead key 143 * @key: the aead key
146 * @gen: the key's generation 144 * @gen: the key's generation
147 * @seqno: the key seqno (cluster scope) 145 * @seqno: the key seqno (cluster scope)
148 * @refcnt: the key reference counter 146 * @refcnt: the key reference counter
149 */ 147 */
150 struct tipc_aead { 148 struct tipc_aead {
151 #define TIPC_AEAD_HINT_LEN (5) 149 #define TIPC_AEAD_HINT_LEN (5)
152 struct tipc_tfm * __percpu *tfm_entry; 150 struct tipc_tfm * __percpu *tfm_entry;
153 struct tipc_crypto *crypto; 151 struct tipc_crypto *crypto;
154 struct tipc_aead *cloned; 152 struct tipc_aead *cloned;
155 atomic_t users; 153 atomic_t users;
156 u32 salt; 154 u32 salt;
157 u8 authsize; 155 u8 authsize;
158 u8 mode; 156 u8 mode;
159 char hint[2 * TIPC_AEAD_HINT_LEN + 1]; 157 char hint[2 * TIPC_AEAD_HINT_LEN + 1];
160 struct rcu_head rcu; 158 struct rcu_head rcu;
161 struct tipc_aead_key *key; 159 struct tipc_aead_key *key;
162 u16 gen; 160 u16 gen;
163 161
164 atomic64_t seqno ____cacheline_aligned 162 atomic64_t seqno ____cacheline_aligned;
165 refcount_t refcnt ____cacheline_aligne 163 refcount_t refcnt ____cacheline_aligned;
166 164
167 } ____cacheline_aligned; 165 } ____cacheline_aligned;
168 166
169 /** 167 /**
170 * struct tipc_crypto_stats - TIPC Crypto stat 168 * struct tipc_crypto_stats - TIPC Crypto statistics
171 * @stat: array of crypto statistics <<
172 */ 169 */
173 struct tipc_crypto_stats { 170 struct tipc_crypto_stats {
174 unsigned int stat[MAX_STATS]; 171 unsigned int stat[MAX_STATS];
175 }; 172 };
176 173
177 /** 174 /**
178 * struct tipc_crypto - TIPC TX/RX crypto stru 175 * struct tipc_crypto - TIPC TX/RX crypto structure
179 * @net: struct net 176 * @net: struct net
180 * @node: TIPC node (RX) 177 * @node: TIPC node (RX)
181 * @aead: array of pointers to AEAD keys for e 178 * @aead: array of pointers to AEAD keys for encryption/decryption
182 * @peer_rx_active: replicated peer RX active 179 * @peer_rx_active: replicated peer RX active key index
183 * @key_gen: TX/RX key generation 180 * @key_gen: TX/RX key generation
184 * @key: the key states 181 * @key: the key states
185 * @skey_mode: session key's mode 182 * @skey_mode: session key's mode
186 * @skey: received session key 183 * @skey: received session key
187 * @wq: common workqueue on TX crypto 184 * @wq: common workqueue on TX crypto
188 * @work: delayed work sched for TX/RX 185 * @work: delayed work sched for TX/RX
189 * @key_distr: key distributing state 186 * @key_distr: key distributing state
190 * @rekeying_intv: rekeying interval (in minut 187 * @rekeying_intv: rekeying interval (in minutes)
191 * @stats: the crypto statistics 188 * @stats: the crypto statistics
192 * @name: the crypto name 189 * @name: the crypto name
193 * @sndnxt: the per-peer sndnxt (TX) 190 * @sndnxt: the per-peer sndnxt (TX)
194 * @timer1: general timer 1 (jiffies) 191 * @timer1: general timer 1 (jiffies)
195 * @timer2: general timer 2 (jiffies) 192 * @timer2: general timer 2 (jiffies)
196 * @working: the crypto is working or not 193 * @working: the crypto is working or not
197 * @key_master: flag indicates if master key e 194 * @key_master: flag indicates if master key exists
198 * @legacy_user: flag indicates if a peer join 195 * @legacy_user: flag indicates if a peer joins w/o master key (for bwd comp.)
199 * @nokey: no key indication 196 * @nokey: no key indication
200 * @flags: combined flags field <<
201 * @lock: tipc_key lock 197 * @lock: tipc_key lock
202 */ 198 */
203 struct tipc_crypto { 199 struct tipc_crypto {
204 struct net *net; 200 struct net *net;
205 struct tipc_node *node; 201 struct tipc_node *node;
206 struct tipc_aead __rcu *aead[KEY_MAX + 202 struct tipc_aead __rcu *aead[KEY_MAX + 1];
207 atomic_t peer_rx_active; 203 atomic_t peer_rx_active;
208 u16 key_gen; 204 u16 key_gen;
209 struct tipc_key key; 205 struct tipc_key key;
210 u8 skey_mode; 206 u8 skey_mode;
211 struct tipc_aead_key *skey; 207 struct tipc_aead_key *skey;
212 struct workqueue_struct *wq; 208 struct workqueue_struct *wq;
213 struct delayed_work work; 209 struct delayed_work work;
214 #define KEY_DISTR_SCHED 1 210 #define KEY_DISTR_SCHED 1
215 #define KEY_DISTR_COMPL 2 211 #define KEY_DISTR_COMPL 2
216 atomic_t key_distr; 212 atomic_t key_distr;
217 u32 rekeying_intv; 213 u32 rekeying_intv;
218 214
219 struct tipc_crypto_stats __percpu *sta 215 struct tipc_crypto_stats __percpu *stats;
220 char name[48]; 216 char name[48];
221 217
222 atomic64_t sndnxt ____cacheline_aligne 218 atomic64_t sndnxt ____cacheline_aligned;
223 unsigned long timer1; 219 unsigned long timer1;
224 unsigned long timer2; 220 unsigned long timer2;
225 union { 221 union {
226 struct { 222 struct {
227 u8 working:1; 223 u8 working:1;
228 u8 key_master:1; 224 u8 key_master:1;
229 u8 legacy_user:1; 225 u8 legacy_user:1;
230 u8 nokey: 1; 226 u8 nokey: 1;
231 }; 227 };
232 u8 flags; 228 u8 flags;
233 }; 229 };
234 spinlock_t lock; /* crypto lock */ 230 spinlock_t lock; /* crypto lock */
235 231
236 } ____cacheline_aligned; 232 } ____cacheline_aligned;
237 233
238 /* struct tipc_crypto_tx_ctx - TX context for 234 /* struct tipc_crypto_tx_ctx - TX context for callbacks */
239 struct tipc_crypto_tx_ctx { 235 struct tipc_crypto_tx_ctx {
240 struct tipc_aead *aead; 236 struct tipc_aead *aead;
241 struct tipc_bearer *bearer; 237 struct tipc_bearer *bearer;
242 struct tipc_media_addr dst; 238 struct tipc_media_addr dst;
243 }; 239 };
244 240
245 /* struct tipc_crypto_rx_ctx - RX context for 241 /* struct tipc_crypto_rx_ctx - RX context for callbacks */
246 struct tipc_crypto_rx_ctx { 242 struct tipc_crypto_rx_ctx {
247 struct tipc_aead *aead; 243 struct tipc_aead *aead;
248 struct tipc_bearer *bearer; 244 struct tipc_bearer *bearer;
249 }; 245 };
250 246
251 static struct tipc_aead *tipc_aead_get(struct 247 static struct tipc_aead *tipc_aead_get(struct tipc_aead __rcu *aead);
252 static inline void tipc_aead_put(struct tipc_a 248 static inline void tipc_aead_put(struct tipc_aead *aead);
253 static void tipc_aead_free(struct rcu_head *rp 249 static void tipc_aead_free(struct rcu_head *rp);
254 static int tipc_aead_users(struct tipc_aead __ 250 static int tipc_aead_users(struct tipc_aead __rcu *aead);
255 static void tipc_aead_users_inc(struct tipc_ae 251 static void tipc_aead_users_inc(struct tipc_aead __rcu *aead, int lim);
256 static void tipc_aead_users_dec(struct tipc_ae 252 static void tipc_aead_users_dec(struct tipc_aead __rcu *aead, int lim);
257 static void tipc_aead_users_set(struct tipc_ae 253 static void tipc_aead_users_set(struct tipc_aead __rcu *aead, int val);
258 static struct crypto_aead *tipc_aead_tfm_next( 254 static struct crypto_aead *tipc_aead_tfm_next(struct tipc_aead *aead);
259 static int tipc_aead_init(struct tipc_aead **a 255 static int tipc_aead_init(struct tipc_aead **aead, struct tipc_aead_key *ukey,
260 u8 mode); 256 u8 mode);
261 static int tipc_aead_clone(struct tipc_aead ** 257 static int tipc_aead_clone(struct tipc_aead **dst, struct tipc_aead *src);
262 static void *tipc_aead_mem_alloc(struct crypto 258 static void *tipc_aead_mem_alloc(struct crypto_aead *tfm,
263 unsigned int 259 unsigned int crypto_ctx_size,
264 u8 **iv, stru 260 u8 **iv, struct aead_request **req,
265 struct scatte 261 struct scatterlist **sg, int nsg);
266 static int tipc_aead_encrypt(struct tipc_aead 262 static int tipc_aead_encrypt(struct tipc_aead *aead, struct sk_buff *skb,
267 struct tipc_beare 263 struct tipc_bearer *b,
268 struct tipc_media 264 struct tipc_media_addr *dst,
269 struct tipc_node 265 struct tipc_node *__dnode);
270 static void tipc_aead_encrypt_done(void *data, !! 266 static void tipc_aead_encrypt_done(struct crypto_async_request *base, int err);
271 static int tipc_aead_decrypt(struct net *net, 267 static int tipc_aead_decrypt(struct net *net, struct tipc_aead *aead,
272 struct sk_buff *s 268 struct sk_buff *skb, struct tipc_bearer *b);
273 static void tipc_aead_decrypt_done(void *data, !! 269 static void tipc_aead_decrypt_done(struct crypto_async_request *base, int err);
274 static inline int tipc_ehdr_size(struct tipc_e 270 static inline int tipc_ehdr_size(struct tipc_ehdr *ehdr);
275 static int tipc_ehdr_build(struct net *net, st 271 static int tipc_ehdr_build(struct net *net, struct tipc_aead *aead,
276 u8 tx_key, struct s 272 u8 tx_key, struct sk_buff *skb,
277 struct tipc_crypto 273 struct tipc_crypto *__rx);
278 static inline void tipc_crypto_key_set_state(s 274 static inline void tipc_crypto_key_set_state(struct tipc_crypto *c,
279 u 275 u8 new_passive,
280 u 276 u8 new_active,
281 u 277 u8 new_pending);
282 static int tipc_crypto_key_attach(struct tipc_ 278 static int tipc_crypto_key_attach(struct tipc_crypto *c,
283 struct tipc_ 279 struct tipc_aead *aead, u8 pos,
284 bool master_ 280 bool master_key);
285 static bool tipc_crypto_key_try_align(struct t 281 static bool tipc_crypto_key_try_align(struct tipc_crypto *rx, u8 new_pending);
286 static struct tipc_aead *tipc_crypto_key_pick_ 282 static struct tipc_aead *tipc_crypto_key_pick_tx(struct tipc_crypto *tx,
287 283 struct tipc_crypto *rx,
288 284 struct sk_buff *skb,
289 285 u8 tx_key);
290 static void tipc_crypto_key_synch(struct tipc_ 286 static void tipc_crypto_key_synch(struct tipc_crypto *rx, struct sk_buff *skb);
291 static int tipc_crypto_key_revoke(struct net * 287 static int tipc_crypto_key_revoke(struct net *net, u8 tx_key);
292 static inline void tipc_crypto_clone_msg(struc 288 static inline void tipc_crypto_clone_msg(struct net *net, struct sk_buff *_skb,
293 struc 289 struct tipc_bearer *b,
294 struc 290 struct tipc_media_addr *dst,
295 struc 291 struct tipc_node *__dnode, u8 type);
296 static void tipc_crypto_rcv_complete(struct ne 292 static void tipc_crypto_rcv_complete(struct net *net, struct tipc_aead *aead,
297 struct ti 293 struct tipc_bearer *b,
298 struct sk 294 struct sk_buff **skb, int err);
299 static void tipc_crypto_do_cmd(struct net *net 295 static void tipc_crypto_do_cmd(struct net *net, int cmd);
300 static char *tipc_crypto_key_dump(struct tipc_ 296 static char *tipc_crypto_key_dump(struct tipc_crypto *c, char *buf);
301 static char *tipc_key_change_dump(struct tipc_ 297 static char *tipc_key_change_dump(struct tipc_key old, struct tipc_key new,
302 char *buf); 298 char *buf);
303 static int tipc_crypto_key_xmit(struct net *ne 299 static int tipc_crypto_key_xmit(struct net *net, struct tipc_aead_key *skey,
304 u16 gen, u8 mo 300 u16 gen, u8 mode, u32 dnode);
305 static bool tipc_crypto_key_rcv(struct tipc_cr 301 static bool tipc_crypto_key_rcv(struct tipc_crypto *rx, struct tipc_msg *hdr);
306 static void tipc_crypto_work_tx(struct work_st 302 static void tipc_crypto_work_tx(struct work_struct *work);
307 static void tipc_crypto_work_rx(struct work_st 303 static void tipc_crypto_work_rx(struct work_struct *work);
308 static int tipc_aead_key_generate(struct tipc_ 304 static int tipc_aead_key_generate(struct tipc_aead_key *skey);
309 305
310 #define is_tx(crypto) (!(crypto)->node) 306 #define is_tx(crypto) (!(crypto)->node)
311 #define is_rx(crypto) (!is_tx(crypto)) 307 #define is_rx(crypto) (!is_tx(crypto))
312 308
313 #define key_next(cur) ((cur) % KEY_MAX + 1) 309 #define key_next(cur) ((cur) % KEY_MAX + 1)
314 310
315 #define tipc_aead_rcu_ptr(rcu_ptr, lock) 311 #define tipc_aead_rcu_ptr(rcu_ptr, lock) \
316 rcu_dereference_protected((rcu_ptr), l 312 rcu_dereference_protected((rcu_ptr), lockdep_is_held(lock))
317 313
318 #define tipc_aead_rcu_replace(rcu_ptr, ptr, lo 314 #define tipc_aead_rcu_replace(rcu_ptr, ptr, lock) \
319 do { 315 do { \
320 struct tipc_aead *__tmp = rcu_derefere !! 316 typeof(rcu_ptr) __tmp = rcu_dereference_protected((rcu_ptr), \
321 317 lockdep_is_held(lock)); \
322 rcu_assign_pointer((rcu_ptr), (ptr)); 318 rcu_assign_pointer((rcu_ptr), (ptr)); \
323 tipc_aead_put(__tmp); 319 tipc_aead_put(__tmp); \
324 } while (0) 320 } while (0)
325 321
326 #define tipc_crypto_key_detach(rcu_ptr, lock) 322 #define tipc_crypto_key_detach(rcu_ptr, lock) \
327 tipc_aead_rcu_replace((rcu_ptr), NULL, 323 tipc_aead_rcu_replace((rcu_ptr), NULL, lock)
328 324
329 /** 325 /**
330 * tipc_aead_key_validate - Validate a AEAD us 326 * tipc_aead_key_validate - Validate a AEAD user key
331 * @ukey: pointer to user key data <<
332 * @info: netlink info pointer <<
333 */ 327 */
334 int tipc_aead_key_validate(struct tipc_aead_ke 328 int tipc_aead_key_validate(struct tipc_aead_key *ukey, struct genl_info *info)
335 { 329 {
336 int keylen; 330 int keylen;
337 331
338 /* Check if algorithm exists */ 332 /* Check if algorithm exists */
339 if (unlikely(!crypto_has_alg(ukey->alg 333 if (unlikely(!crypto_has_alg(ukey->alg_name, 0, 0))) {
340 GENL_SET_ERR_MSG(info, "unable 334 GENL_SET_ERR_MSG(info, "unable to load the algorithm (module existed?)");
341 return -ENODEV; 335 return -ENODEV;
342 } 336 }
343 337
344 /* Currently, we only support the "gcm 338 /* Currently, we only support the "gcm(aes)" cipher algorithm */
345 if (strcmp(ukey->alg_name, "gcm(aes)") 339 if (strcmp(ukey->alg_name, "gcm(aes)")) {
346 GENL_SET_ERR_MSG(info, "not su 340 GENL_SET_ERR_MSG(info, "not supported yet the algorithm");
347 return -ENOTSUPP; 341 return -ENOTSUPP;
348 } 342 }
349 343
350 /* Check if key size is correct */ 344 /* Check if key size is correct */
351 keylen = ukey->keylen - TIPC_AES_GCM_S 345 keylen = ukey->keylen - TIPC_AES_GCM_SALT_SIZE;
352 if (unlikely(keylen != TIPC_AES_GCM_KE 346 if (unlikely(keylen != TIPC_AES_GCM_KEY_SIZE_128 &&
353 keylen != TIPC_AES_GCM_KE 347 keylen != TIPC_AES_GCM_KEY_SIZE_192 &&
354 keylen != TIPC_AES_GCM_KE 348 keylen != TIPC_AES_GCM_KEY_SIZE_256)) {
355 GENL_SET_ERR_MSG(info, "incorr 349 GENL_SET_ERR_MSG(info, "incorrect key length (20, 28 or 36 octets?)");
356 return -EKEYREJECTED; 350 return -EKEYREJECTED;
357 } 351 }
358 352
359 return 0; 353 return 0;
360 } 354 }
361 355
362 /** 356 /**
363 * tipc_aead_key_generate - Generate new sessi 357 * tipc_aead_key_generate - Generate new session key
364 * @skey: input/output key with new content 358 * @skey: input/output key with new content
365 * 359 *
366 * Return: 0 in case of success, otherwise < 0 360 * Return: 0 in case of success, otherwise < 0
367 */ 361 */
368 static int tipc_aead_key_generate(struct tipc_ 362 static int tipc_aead_key_generate(struct tipc_aead_key *skey)
369 { 363 {
370 int rc = 0; 364 int rc = 0;
371 365
372 /* Fill the key's content with a rando 366 /* Fill the key's content with a random value via RNG cipher */
373 rc = crypto_get_default_rng(); 367 rc = crypto_get_default_rng();
374 if (likely(!rc)) { 368 if (likely(!rc)) {
375 rc = crypto_rng_get_bytes(cryp 369 rc = crypto_rng_get_bytes(crypto_default_rng, skey->key,
376 skey 370 skey->keylen);
377 crypto_put_default_rng(); 371 crypto_put_default_rng();
378 } 372 }
379 373
380 return rc; 374 return rc;
381 } 375 }
382 376
383 static struct tipc_aead *tipc_aead_get(struct 377 static struct tipc_aead *tipc_aead_get(struct tipc_aead __rcu *aead)
384 { 378 {
385 struct tipc_aead *tmp; 379 struct tipc_aead *tmp;
386 380
387 rcu_read_lock(); 381 rcu_read_lock();
388 tmp = rcu_dereference(aead); 382 tmp = rcu_dereference(aead);
389 if (unlikely(!tmp || !refcount_inc_not 383 if (unlikely(!tmp || !refcount_inc_not_zero(&tmp->refcnt)))
390 tmp = NULL; 384 tmp = NULL;
391 rcu_read_unlock(); 385 rcu_read_unlock();
392 386
393 return tmp; 387 return tmp;
394 } 388 }
395 389
396 static inline void tipc_aead_put(struct tipc_a 390 static inline void tipc_aead_put(struct tipc_aead *aead)
397 { 391 {
398 if (aead && refcount_dec_and_test(&aea 392 if (aead && refcount_dec_and_test(&aead->refcnt))
399 call_rcu(&aead->rcu, tipc_aead 393 call_rcu(&aead->rcu, tipc_aead_free);
400 } 394 }
401 395
402 /** 396 /**
403 * tipc_aead_free - Release AEAD key incl. all 397 * tipc_aead_free - Release AEAD key incl. all the TFMs in the list
404 * @rp: rcu head pointer 398 * @rp: rcu head pointer
405 */ 399 */
406 static void tipc_aead_free(struct rcu_head *rp 400 static void tipc_aead_free(struct rcu_head *rp)
407 { 401 {
408 struct tipc_aead *aead = container_of( 402 struct tipc_aead *aead = container_of(rp, struct tipc_aead, rcu);
409 struct tipc_tfm *tfm_entry, *head, *tm 403 struct tipc_tfm *tfm_entry, *head, *tmp;
410 404
411 if (aead->cloned) { 405 if (aead->cloned) {
412 tipc_aead_put(aead->cloned); 406 tipc_aead_put(aead->cloned);
413 } else { 407 } else {
414 head = *get_cpu_ptr(aead->tfm_ 408 head = *get_cpu_ptr(aead->tfm_entry);
415 put_cpu_ptr(aead->tfm_entry); 409 put_cpu_ptr(aead->tfm_entry);
416 list_for_each_entry_safe(tfm_e 410 list_for_each_entry_safe(tfm_entry, tmp, &head->list, list) {
417 crypto_free_aead(tfm_e 411 crypto_free_aead(tfm_entry->tfm);
418 list_del(&tfm_entry->l 412 list_del(&tfm_entry->list);
419 kfree(tfm_entry); 413 kfree(tfm_entry);
420 } 414 }
421 /* Free the head */ 415 /* Free the head */
422 crypto_free_aead(head->tfm); 416 crypto_free_aead(head->tfm);
423 list_del(&head->list); 417 list_del(&head->list);
424 kfree(head); 418 kfree(head);
425 } 419 }
426 free_percpu(aead->tfm_entry); 420 free_percpu(aead->tfm_entry);
427 kfree_sensitive(aead->key); 421 kfree_sensitive(aead->key);
428 kfree(aead); 422 kfree(aead);
429 } 423 }
430 424
431 static int tipc_aead_users(struct tipc_aead __ 425 static int tipc_aead_users(struct tipc_aead __rcu *aead)
432 { 426 {
433 struct tipc_aead *tmp; 427 struct tipc_aead *tmp;
434 int users = 0; 428 int users = 0;
435 429
436 rcu_read_lock(); 430 rcu_read_lock();
437 tmp = rcu_dereference(aead); 431 tmp = rcu_dereference(aead);
438 if (tmp) 432 if (tmp)
439 users = atomic_read(&tmp->user 433 users = atomic_read(&tmp->users);
440 rcu_read_unlock(); 434 rcu_read_unlock();
441 435
442 return users; 436 return users;
443 } 437 }
444 438
445 static void tipc_aead_users_inc(struct tipc_ae 439 static void tipc_aead_users_inc(struct tipc_aead __rcu *aead, int lim)
446 { 440 {
447 struct tipc_aead *tmp; 441 struct tipc_aead *tmp;
448 442
449 rcu_read_lock(); 443 rcu_read_lock();
450 tmp = rcu_dereference(aead); 444 tmp = rcu_dereference(aead);
451 if (tmp) 445 if (tmp)
452 atomic_add_unless(&tmp->users, 446 atomic_add_unless(&tmp->users, 1, lim);
453 rcu_read_unlock(); 447 rcu_read_unlock();
454 } 448 }
455 449
456 static void tipc_aead_users_dec(struct tipc_ae 450 static void tipc_aead_users_dec(struct tipc_aead __rcu *aead, int lim)
457 { 451 {
458 struct tipc_aead *tmp; 452 struct tipc_aead *tmp;
459 453
460 rcu_read_lock(); 454 rcu_read_lock();
461 tmp = rcu_dereference(aead); 455 tmp = rcu_dereference(aead);
462 if (tmp) 456 if (tmp)
463 atomic_add_unless(&rcu_derefer 457 atomic_add_unless(&rcu_dereference(aead)->users, -1, lim);
464 rcu_read_unlock(); 458 rcu_read_unlock();
465 } 459 }
466 460
467 static void tipc_aead_users_set(struct tipc_ae 461 static void tipc_aead_users_set(struct tipc_aead __rcu *aead, int val)
468 { 462 {
469 struct tipc_aead *tmp; 463 struct tipc_aead *tmp;
470 int cur; 464 int cur;
471 465
472 rcu_read_lock(); 466 rcu_read_lock();
473 tmp = rcu_dereference(aead); 467 tmp = rcu_dereference(aead);
474 if (tmp) { 468 if (tmp) {
475 do { 469 do {
476 cur = atomic_read(&tmp 470 cur = atomic_read(&tmp->users);
477 if (cur == val) 471 if (cur == val)
478 break; 472 break;
479 } while (atomic_cmpxchg(&tmp-> 473 } while (atomic_cmpxchg(&tmp->users, cur, val) != cur);
480 } 474 }
481 rcu_read_unlock(); 475 rcu_read_unlock();
482 } 476 }
483 477
484 /** 478 /**
485 * tipc_aead_tfm_next - Move TFM entry to the 479 * tipc_aead_tfm_next - Move TFM entry to the next one in list and return it
486 * @aead: the AEAD key pointer <<
487 */ 480 */
488 static struct crypto_aead *tipc_aead_tfm_next( 481 static struct crypto_aead *tipc_aead_tfm_next(struct tipc_aead *aead)
489 { 482 {
490 struct tipc_tfm **tfm_entry; 483 struct tipc_tfm **tfm_entry;
491 struct crypto_aead *tfm; 484 struct crypto_aead *tfm;
492 485
493 tfm_entry = get_cpu_ptr(aead->tfm_entr 486 tfm_entry = get_cpu_ptr(aead->tfm_entry);
494 *tfm_entry = list_next_entry(*tfm_entr 487 *tfm_entry = list_next_entry(*tfm_entry, list);
495 tfm = (*tfm_entry)->tfm; 488 tfm = (*tfm_entry)->tfm;
496 put_cpu_ptr(tfm_entry); 489 put_cpu_ptr(tfm_entry);
497 490
498 return tfm; 491 return tfm;
499 } 492 }
500 493
501 /** 494 /**
502 * tipc_aead_init - Initiate TIPC AEAD 495 * tipc_aead_init - Initiate TIPC AEAD
503 * @aead: returned new TIPC AEAD key handle po 496 * @aead: returned new TIPC AEAD key handle pointer
504 * @ukey: pointer to user key data 497 * @ukey: pointer to user key data
505 * @mode: the key mode 498 * @mode: the key mode
506 * 499 *
507 * Allocate a (list of) new cipher transformat 500 * Allocate a (list of) new cipher transformation (TFM) with the specific user
508 * key data if valid. The number of the alloca 501 * key data if valid. The number of the allocated TFMs can be set via the sysfs
509 * "net/tipc/max_tfms" first. 502 * "net/tipc/max_tfms" first.
510 * Also, all the other AEAD data are also init 503 * Also, all the other AEAD data are also initialized.
511 * 504 *
512 * Return: 0 if the initiation is successful, 505 * Return: 0 if the initiation is successful, otherwise: < 0
513 */ 506 */
514 static int tipc_aead_init(struct tipc_aead **a 507 static int tipc_aead_init(struct tipc_aead **aead, struct tipc_aead_key *ukey,
515 u8 mode) 508 u8 mode)
516 { 509 {
517 struct tipc_tfm *tfm_entry, *head; 510 struct tipc_tfm *tfm_entry, *head;
518 struct crypto_aead *tfm; 511 struct crypto_aead *tfm;
519 struct tipc_aead *tmp; 512 struct tipc_aead *tmp;
520 int keylen, err, cpu; 513 int keylen, err, cpu;
521 int tfm_cnt = 0; 514 int tfm_cnt = 0;
522 515
523 if (unlikely(*aead)) 516 if (unlikely(*aead))
524 return -EEXIST; 517 return -EEXIST;
525 518
526 /* Allocate a new AEAD */ 519 /* Allocate a new AEAD */
527 tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC 520 tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC);
528 if (unlikely(!tmp)) 521 if (unlikely(!tmp))
529 return -ENOMEM; 522 return -ENOMEM;
530 523
531 /* The key consists of two parts: [AES 524 /* The key consists of two parts: [AES-KEY][SALT] */
532 keylen = ukey->keylen - TIPC_AES_GCM_S 525 keylen = ukey->keylen - TIPC_AES_GCM_SALT_SIZE;
533 526
534 /* Allocate per-cpu TFM entry pointer 527 /* Allocate per-cpu TFM entry pointer */
535 tmp->tfm_entry = alloc_percpu(struct t 528 tmp->tfm_entry = alloc_percpu(struct tipc_tfm *);
536 if (!tmp->tfm_entry) { 529 if (!tmp->tfm_entry) {
537 kfree_sensitive(tmp); 530 kfree_sensitive(tmp);
538 return -ENOMEM; 531 return -ENOMEM;
539 } 532 }
540 533
541 /* Make a list of TFMs with the user k 534 /* Make a list of TFMs with the user key data */
542 do { 535 do {
543 tfm = crypto_alloc_aead(ukey-> 536 tfm = crypto_alloc_aead(ukey->alg_name, 0, 0);
544 if (IS_ERR(tfm)) { 537 if (IS_ERR(tfm)) {
545 err = PTR_ERR(tfm); 538 err = PTR_ERR(tfm);
546 break; 539 break;
547 } 540 }
548 541
549 if (unlikely(!tfm_cnt && 542 if (unlikely(!tfm_cnt &&
550 crypto_aead_ivsiz 543 crypto_aead_ivsize(tfm) != TIPC_AES_GCM_IV_SIZE)) {
551 crypto_free_aead(tfm); 544 crypto_free_aead(tfm);
552 err = -ENOTSUPP; 545 err = -ENOTSUPP;
553 break; 546 break;
554 } 547 }
555 548
556 err = crypto_aead_setauthsize( 549 err = crypto_aead_setauthsize(tfm, TIPC_AES_GCM_TAG_SIZE);
557 err |= crypto_aead_setkey(tfm, 550 err |= crypto_aead_setkey(tfm, ukey->key, keylen);
558 if (unlikely(err)) { 551 if (unlikely(err)) {
559 crypto_free_aead(tfm); 552 crypto_free_aead(tfm);
560 break; 553 break;
561 } 554 }
562 555
563 tfm_entry = kmalloc(sizeof(*tf 556 tfm_entry = kmalloc(sizeof(*tfm_entry), GFP_KERNEL);
564 if (unlikely(!tfm_entry)) { 557 if (unlikely(!tfm_entry)) {
565 crypto_free_aead(tfm); 558 crypto_free_aead(tfm);
566 err = -ENOMEM; 559 err = -ENOMEM;
567 break; 560 break;
568 } 561 }
569 INIT_LIST_HEAD(&tfm_entry->lis 562 INIT_LIST_HEAD(&tfm_entry->list);
570 tfm_entry->tfm = tfm; 563 tfm_entry->tfm = tfm;
571 564
572 /* First entry? */ 565 /* First entry? */
573 if (!tfm_cnt) { 566 if (!tfm_cnt) {
574 head = tfm_entry; 567 head = tfm_entry;
575 for_each_possible_cpu( 568 for_each_possible_cpu(cpu) {
576 *per_cpu_ptr(t 569 *per_cpu_ptr(tmp->tfm_entry, cpu) = head;
577 } 570 }
578 } else { 571 } else {
579 list_add_tail(&tfm_ent 572 list_add_tail(&tfm_entry->list, &head->list);
580 } 573 }
581 574
582 } while (++tfm_cnt < sysctl_tipc_max_t 575 } while (++tfm_cnt < sysctl_tipc_max_tfms);
583 576
584 /* Not any TFM is allocated? */ 577 /* Not any TFM is allocated? */
585 if (!tfm_cnt) { 578 if (!tfm_cnt) {
586 free_percpu(tmp->tfm_entry); 579 free_percpu(tmp->tfm_entry);
587 kfree_sensitive(tmp); 580 kfree_sensitive(tmp);
588 return err; 581 return err;
589 } 582 }
590 583
591 /* Form a hex string of some last byte 584 /* Form a hex string of some last bytes as the key's hint */
592 bin2hex(tmp->hint, ukey->key + keylen 585 bin2hex(tmp->hint, ukey->key + keylen - TIPC_AEAD_HINT_LEN,
593 TIPC_AEAD_HINT_LEN); 586 TIPC_AEAD_HINT_LEN);
594 587
595 /* Initialize the other data */ 588 /* Initialize the other data */
596 tmp->mode = mode; 589 tmp->mode = mode;
597 tmp->cloned = NULL; 590 tmp->cloned = NULL;
598 tmp->authsize = TIPC_AES_GCM_TAG_SIZE; 591 tmp->authsize = TIPC_AES_GCM_TAG_SIZE;
599 tmp->key = kmemdup(ukey, tipc_aead_key 592 tmp->key = kmemdup(ukey, tipc_aead_key_size(ukey), GFP_KERNEL);
600 if (!tmp->key) { 593 if (!tmp->key) {
601 tipc_aead_free(&tmp->rcu); 594 tipc_aead_free(&tmp->rcu);
602 return -ENOMEM; 595 return -ENOMEM;
603 } 596 }
604 memcpy(&tmp->salt, ukey->key + keylen, 597 memcpy(&tmp->salt, ukey->key + keylen, TIPC_AES_GCM_SALT_SIZE);
605 atomic_set(&tmp->users, 0); 598 atomic_set(&tmp->users, 0);
606 atomic64_set(&tmp->seqno, 0); 599 atomic64_set(&tmp->seqno, 0);
607 refcount_set(&tmp->refcnt, 1); 600 refcount_set(&tmp->refcnt, 1);
608 601
609 *aead = tmp; 602 *aead = tmp;
610 return 0; 603 return 0;
611 } 604 }
612 605
613 /** 606 /**
614 * tipc_aead_clone - Clone a TIPC AEAD key 607 * tipc_aead_clone - Clone a TIPC AEAD key
615 * @dst: dest key for the cloning 608 * @dst: dest key for the cloning
616 * @src: source key to clone from 609 * @src: source key to clone from
617 * 610 *
618 * Make a "copy" of the source AEAD key data t 611 * Make a "copy" of the source AEAD key data to the dest, the TFMs list is
619 * common for the keys. 612 * common for the keys.
620 * A reference to the source is hold in the "c 613 * A reference to the source is hold in the "cloned" pointer for the later
621 * freeing purposes. 614 * freeing purposes.
622 * 615 *
623 * Note: this must be done in cluster-key mode 616 * Note: this must be done in cluster-key mode only!
624 * Return: 0 in case of success, otherwise < 0 617 * Return: 0 in case of success, otherwise < 0
625 */ 618 */
626 static int tipc_aead_clone(struct tipc_aead ** 619 static int tipc_aead_clone(struct tipc_aead **dst, struct tipc_aead *src)
627 { 620 {
628 struct tipc_aead *aead; 621 struct tipc_aead *aead;
629 int cpu; 622 int cpu;
630 623
631 if (!src) 624 if (!src)
632 return -ENOKEY; 625 return -ENOKEY;
633 626
634 if (src->mode != CLUSTER_KEY) 627 if (src->mode != CLUSTER_KEY)
635 return -EINVAL; 628 return -EINVAL;
636 629
637 if (unlikely(*dst)) 630 if (unlikely(*dst))
638 return -EEXIST; 631 return -EEXIST;
639 632
640 aead = kzalloc(sizeof(*aead), GFP_ATOM 633 aead = kzalloc(sizeof(*aead), GFP_ATOMIC);
641 if (unlikely(!aead)) 634 if (unlikely(!aead))
642 return -ENOMEM; 635 return -ENOMEM;
643 636
644 aead->tfm_entry = alloc_percpu_gfp(str 637 aead->tfm_entry = alloc_percpu_gfp(struct tipc_tfm *, GFP_ATOMIC);
645 if (unlikely(!aead->tfm_entry)) { 638 if (unlikely(!aead->tfm_entry)) {
646 kfree_sensitive(aead); 639 kfree_sensitive(aead);
647 return -ENOMEM; 640 return -ENOMEM;
648 } 641 }
649 642
650 for_each_possible_cpu(cpu) { 643 for_each_possible_cpu(cpu) {
651 *per_cpu_ptr(aead->tfm_entry, 644 *per_cpu_ptr(aead->tfm_entry, cpu) =
652 *per_cpu_ptr(s 645 *per_cpu_ptr(src->tfm_entry, cpu);
653 } 646 }
654 647
655 memcpy(aead->hint, src->hint, sizeof(s 648 memcpy(aead->hint, src->hint, sizeof(src->hint));
656 aead->mode = src->mode; 649 aead->mode = src->mode;
657 aead->salt = src->salt; 650 aead->salt = src->salt;
658 aead->authsize = src->authsize; 651 aead->authsize = src->authsize;
659 atomic_set(&aead->users, 0); 652 atomic_set(&aead->users, 0);
660 atomic64_set(&aead->seqno, 0); 653 atomic64_set(&aead->seqno, 0);
661 refcount_set(&aead->refcnt, 1); 654 refcount_set(&aead->refcnt, 1);
662 655
663 WARN_ON(!refcount_inc_not_zero(&src->r 656 WARN_ON(!refcount_inc_not_zero(&src->refcnt));
664 aead->cloned = src; 657 aead->cloned = src;
665 658
666 *dst = aead; 659 *dst = aead;
667 return 0; 660 return 0;
668 } 661 }
669 662
670 /** 663 /**
671 * tipc_aead_mem_alloc - Allocate memory for A 664 * tipc_aead_mem_alloc - Allocate memory for AEAD request operations
672 * @tfm: cipher handle to be registered with t 665 * @tfm: cipher handle to be registered with the request
673 * @crypto_ctx_size: size of crypto context fo 666 * @crypto_ctx_size: size of crypto context for callback
674 * @iv: returned pointer to IV data 667 * @iv: returned pointer to IV data
675 * @req: returned pointer to AEAD request data 668 * @req: returned pointer to AEAD request data
676 * @sg: returned pointer to SG lists 669 * @sg: returned pointer to SG lists
677 * @nsg: number of SG lists to be allocated 670 * @nsg: number of SG lists to be allocated
678 * 671 *
679 * Allocate memory to store the crypto context 672 * Allocate memory to store the crypto context data, AEAD request, IV and SG
680 * lists, the memory layout is as follows: 673 * lists, the memory layout is as follows:
681 * crypto_ctx || iv || aead_req || sg[] 674 * crypto_ctx || iv || aead_req || sg[]
682 * 675 *
683 * Return: the pointer to the memory areas in 676 * Return: the pointer to the memory areas in case of success, otherwise NULL
684 */ 677 */
685 static void *tipc_aead_mem_alloc(struct crypto 678 static void *tipc_aead_mem_alloc(struct crypto_aead *tfm,
686 unsigned int 679 unsigned int crypto_ctx_size,
687 u8 **iv, stru 680 u8 **iv, struct aead_request **req,
688 struct scatte 681 struct scatterlist **sg, int nsg)
689 { 682 {
690 unsigned int iv_size, req_size; 683 unsigned int iv_size, req_size;
691 unsigned int len; 684 unsigned int len;
692 u8 *mem; 685 u8 *mem;
693 686
694 iv_size = crypto_aead_ivsize(tfm); 687 iv_size = crypto_aead_ivsize(tfm);
695 req_size = sizeof(**req) + crypto_aead 688 req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
696 689
697 len = crypto_ctx_size; 690 len = crypto_ctx_size;
698 len += iv_size; 691 len += iv_size;
699 len += crypto_aead_alignmask(tfm) & ~( 692 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
700 len = ALIGN(len, crypto_tfm_ctx_alignm 693 len = ALIGN(len, crypto_tfm_ctx_alignment());
701 len += req_size; 694 len += req_size;
702 len = ALIGN(len, __alignof__(struct sc 695 len = ALIGN(len, __alignof__(struct scatterlist));
703 len += nsg * sizeof(**sg); 696 len += nsg * sizeof(**sg);
704 697
705 mem = kmalloc(len, GFP_ATOMIC); 698 mem = kmalloc(len, GFP_ATOMIC);
706 if (!mem) 699 if (!mem)
707 return NULL; 700 return NULL;
708 701
709 *iv = (u8 *)PTR_ALIGN(mem + crypto_ctx 702 *iv = (u8 *)PTR_ALIGN(mem + crypto_ctx_size,
710 crypto_aead_alig 703 crypto_aead_alignmask(tfm) + 1);
711 *req = (struct aead_request *)PTR_ALIG 704 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
712 705 crypto_tfm_ctx_alignment());
713 *sg = (struct scatterlist *)PTR_ALIGN( 706 *sg = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
714 707 __alignof__(struct scatterlist));
715 708
716 return (void *)mem; 709 return (void *)mem;
717 } 710 }
718 711
719 /** 712 /**
720 * tipc_aead_encrypt - Encrypt a message 713 * tipc_aead_encrypt - Encrypt a message
721 * @aead: TIPC AEAD key for the message encryp 714 * @aead: TIPC AEAD key for the message encryption
722 * @skb: the input/output skb 715 * @skb: the input/output skb
723 * @b: TIPC bearer where the message will be d 716 * @b: TIPC bearer where the message will be delivered after the encryption
724 * @dst: the destination media address 717 * @dst: the destination media address
725 * @__dnode: TIPC dest node if "known" 718 * @__dnode: TIPC dest node if "known"
726 * 719 *
727 * Return: 720 * Return:
728 * * 0 : if the encryption h !! 721 * 0 : if the encryption has completed
729 * * -EINPROGRESS/-EBUSY : if a callback will !! 722 * -EINPROGRESS/-EBUSY : if a callback will be performed
730 * * < 0 : the encryption has !! 723 * < 0 : the encryption has failed
731 */ 724 */
732 static int tipc_aead_encrypt(struct tipc_aead 725 static int tipc_aead_encrypt(struct tipc_aead *aead, struct sk_buff *skb,
733 struct tipc_beare 726 struct tipc_bearer *b,
734 struct tipc_media 727 struct tipc_media_addr *dst,
735 struct tipc_node 728 struct tipc_node *__dnode)
736 { 729 {
737 struct crypto_aead *tfm = tipc_aead_tf 730 struct crypto_aead *tfm = tipc_aead_tfm_next(aead);
738 struct tipc_crypto_tx_ctx *tx_ctx; 731 struct tipc_crypto_tx_ctx *tx_ctx;
739 struct aead_request *req; 732 struct aead_request *req;
740 struct sk_buff *trailer; 733 struct sk_buff *trailer;
741 struct scatterlist *sg; 734 struct scatterlist *sg;
742 struct tipc_ehdr *ehdr; 735 struct tipc_ehdr *ehdr;
743 int ehsz, len, tailen, nsg, rc; 736 int ehsz, len, tailen, nsg, rc;
744 void *ctx; 737 void *ctx;
745 u32 salt; 738 u32 salt;
746 u8 *iv; 739 u8 *iv;
747 740
748 /* Make sure message len at least 4-by 741 /* Make sure message len at least 4-byte aligned */
749 len = ALIGN(skb->len, 4); 742 len = ALIGN(skb->len, 4);
750 tailen = len - skb->len + aead->authsi 743 tailen = len - skb->len + aead->authsize;
751 744
752 /* Expand skb tail for authentication 745 /* Expand skb tail for authentication tag:
753 * As for simplicity, we'd have made s 746 * As for simplicity, we'd have made sure skb having enough tailroom
754 * for authentication tag @skb allocat 747 * for authentication tag @skb allocation. Even when skb is nonlinear
755 * but there is no frag_list, it shoul 748 * but there is no frag_list, it should be still fine!
756 * Otherwise, we must cow it to be a w 749 * Otherwise, we must cow it to be a writable buffer with the tailroom.
757 */ 750 */
758 SKB_LINEAR_ASSERT(skb); 751 SKB_LINEAR_ASSERT(skb);
759 if (tailen > skb_tailroom(skb)) { 752 if (tailen > skb_tailroom(skb)) {
760 pr_debug("TX(): skb tailroom i 753 pr_debug("TX(): skb tailroom is not enough: %d, requires: %d\n",
761 skb_tailroom(skb), ta 754 skb_tailroom(skb), tailen);
762 } 755 }
763 756
764 nsg = skb_cow_data(skb, tailen, &trail !! 757 if (unlikely(!skb_cloned(skb) && tailen <= skb_tailroom(skb))) {
765 if (unlikely(nsg < 0)) { !! 758 nsg = 1;
766 pr_err("TX: skb_cow_data() ret !! 759 trailer = skb;
767 return nsg; !! 760 } else {
>> 761 /* TODO: We could avoid skb_cow_data() if skb has no frag_list
>> 762 * e.g. by skb_fill_page_desc() to add another page to the skb
>> 763 * with the wanted tailen... However, page skbs look not often,
>> 764 * so take it easy now!
>> 765 * Cloned skbs e.g. from link_xmit() seems no choice though :(
>> 766 */
>> 767 nsg = skb_cow_data(skb, tailen, &trailer);
>> 768 if (unlikely(nsg < 0)) {
>> 769 pr_err("TX: skb_cow_data() returned %d\n", nsg);
>> 770 return nsg;
>> 771 }
768 } 772 }
769 773
770 pskb_put(skb, trailer, tailen); 774 pskb_put(skb, trailer, tailen);
771 775
772 /* Allocate memory for the AEAD operat 776 /* Allocate memory for the AEAD operation */
773 ctx = tipc_aead_mem_alloc(tfm, sizeof( 777 ctx = tipc_aead_mem_alloc(tfm, sizeof(*tx_ctx), &iv, &req, &sg, nsg);
774 if (unlikely(!ctx)) 778 if (unlikely(!ctx))
775 return -ENOMEM; 779 return -ENOMEM;
776 TIPC_SKB_CB(skb)->crypto_ctx = ctx; 780 TIPC_SKB_CB(skb)->crypto_ctx = ctx;
777 781
778 /* Map skb to the sg lists */ 782 /* Map skb to the sg lists */
779 sg_init_table(sg, nsg); 783 sg_init_table(sg, nsg);
780 rc = skb_to_sgvec(skb, sg, 0, skb->len 784 rc = skb_to_sgvec(skb, sg, 0, skb->len);
781 if (unlikely(rc < 0)) { 785 if (unlikely(rc < 0)) {
782 pr_err("TX: skb_to_sgvec() ret 786 pr_err("TX: skb_to_sgvec() returned %d, nsg %d!\n", rc, nsg);
783 goto exit; 787 goto exit;
784 } 788 }
785 789
786 /* Prepare IV: [SALT (4 octets)][SEQNO 790 /* Prepare IV: [SALT (4 octets)][SEQNO (8 octets)]
787 * In case we're in cluster-key mode, 791 * In case we're in cluster-key mode, SALT is varied by xor-ing with
788 * the source address (or w0 of id), o 792 * the source address (or w0 of id), otherwise with the dest address
789 * if dest is known. 793 * if dest is known.
790 */ 794 */
791 ehdr = (struct tipc_ehdr *)skb->data; 795 ehdr = (struct tipc_ehdr *)skb->data;
792 salt = aead->salt; 796 salt = aead->salt;
793 if (aead->mode == CLUSTER_KEY) 797 if (aead->mode == CLUSTER_KEY)
794 salt ^= __be32_to_cpu(ehdr->ad !! 798 salt ^= ehdr->addr; /* __be32 */
795 else if (__dnode) 799 else if (__dnode)
796 salt ^= tipc_node_get_addr(__d 800 salt ^= tipc_node_get_addr(__dnode);
797 memcpy(iv, &salt, 4); 801 memcpy(iv, &salt, 4);
798 memcpy(iv + 4, (u8 *)&ehdr->seqno, 8); 802 memcpy(iv + 4, (u8 *)&ehdr->seqno, 8);
799 803
800 /* Prepare request */ 804 /* Prepare request */
801 ehsz = tipc_ehdr_size(ehdr); 805 ehsz = tipc_ehdr_size(ehdr);
802 aead_request_set_tfm(req, tfm); 806 aead_request_set_tfm(req, tfm);
803 aead_request_set_ad(req, ehsz); 807 aead_request_set_ad(req, ehsz);
804 aead_request_set_crypt(req, sg, sg, le 808 aead_request_set_crypt(req, sg, sg, len - ehsz, iv);
805 809
806 /* Set callback function & data */ 810 /* Set callback function & data */
807 aead_request_set_callback(req, CRYPTO_ 811 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
808 tipc_aead_en 812 tipc_aead_encrypt_done, skb);
809 tx_ctx = (struct tipc_crypto_tx_ctx *) 813 tx_ctx = (struct tipc_crypto_tx_ctx *)ctx;
810 tx_ctx->aead = aead; 814 tx_ctx->aead = aead;
811 tx_ctx->bearer = b; 815 tx_ctx->bearer = b;
812 memcpy(&tx_ctx->dst, dst, sizeof(*dst) 816 memcpy(&tx_ctx->dst, dst, sizeof(*dst));
813 817
814 /* Hold bearer */ 818 /* Hold bearer */
815 if (unlikely(!tipc_bearer_hold(b))) { 819 if (unlikely(!tipc_bearer_hold(b))) {
816 rc = -ENODEV; 820 rc = -ENODEV;
817 goto exit; 821 goto exit;
818 } 822 }
819 823
820 /* Now, do encrypt */ 824 /* Now, do encrypt */
821 rc = crypto_aead_encrypt(req); 825 rc = crypto_aead_encrypt(req);
822 if (rc == -EINPROGRESS || rc == -EBUSY 826 if (rc == -EINPROGRESS || rc == -EBUSY)
823 return rc; 827 return rc;
824 828
825 tipc_bearer_put(b); 829 tipc_bearer_put(b);
826 830
827 exit: 831 exit:
828 kfree(ctx); 832 kfree(ctx);
829 TIPC_SKB_CB(skb)->crypto_ctx = NULL; 833 TIPC_SKB_CB(skb)->crypto_ctx = NULL;
830 return rc; 834 return rc;
831 } 835 }
832 836
833 static void tipc_aead_encrypt_done(void *data, !! 837 static void tipc_aead_encrypt_done(struct crypto_async_request *base, int err)
834 { 838 {
835 struct sk_buff *skb = data; !! 839 struct sk_buff *skb = base->data;
836 struct tipc_crypto_tx_ctx *tx_ctx = TI 840 struct tipc_crypto_tx_ctx *tx_ctx = TIPC_SKB_CB(skb)->crypto_ctx;
837 struct tipc_bearer *b = tx_ctx->bearer 841 struct tipc_bearer *b = tx_ctx->bearer;
838 struct tipc_aead *aead = tx_ctx->aead; 842 struct tipc_aead *aead = tx_ctx->aead;
839 struct tipc_crypto *tx = aead->crypto; 843 struct tipc_crypto *tx = aead->crypto;
840 struct net *net = tx->net; 844 struct net *net = tx->net;
841 845
842 switch (err) { 846 switch (err) {
843 case 0: 847 case 0:
844 this_cpu_inc(tx->stats->stat[S 848 this_cpu_inc(tx->stats->stat[STAT_ASYNC_OK]);
845 rcu_read_lock(); 849 rcu_read_lock();
846 if (likely(test_bit(0, &b->up) 850 if (likely(test_bit(0, &b->up)))
847 b->media->send_msg(net 851 b->media->send_msg(net, skb, b, &tx_ctx->dst);
848 else 852 else
849 kfree_skb(skb); 853 kfree_skb(skb);
850 rcu_read_unlock(); 854 rcu_read_unlock();
851 break; 855 break;
852 case -EINPROGRESS: 856 case -EINPROGRESS:
853 return; 857 return;
854 default: 858 default:
855 this_cpu_inc(tx->stats->stat[S 859 this_cpu_inc(tx->stats->stat[STAT_ASYNC_NOK]);
856 kfree_skb(skb); 860 kfree_skb(skb);
857 break; 861 break;
858 } 862 }
859 863
860 kfree(tx_ctx); 864 kfree(tx_ctx);
861 tipc_bearer_put(b); 865 tipc_bearer_put(b);
862 tipc_aead_put(aead); 866 tipc_aead_put(aead);
863 } 867 }
864 868
865 /** 869 /**
866 * tipc_aead_decrypt - Decrypt an encrypted me 870 * tipc_aead_decrypt - Decrypt an encrypted message
867 * @net: struct net 871 * @net: struct net
868 * @aead: TIPC AEAD for the message decryption 872 * @aead: TIPC AEAD for the message decryption
869 * @skb: the input/output skb 873 * @skb: the input/output skb
870 * @b: TIPC bearer where the message has been 874 * @b: TIPC bearer where the message has been received
871 * 875 *
872 * Return: 876 * Return:
873 * * 0 : if the decryption h !! 877 * 0 : if the decryption has completed
874 * * -EINPROGRESS/-EBUSY : if a callback will !! 878 * -EINPROGRESS/-EBUSY : if a callback will be performed
875 * * < 0 : the decryption has !! 879 * < 0 : the decryption has failed
876 */ 880 */
877 static int tipc_aead_decrypt(struct net *net, 881 static int tipc_aead_decrypt(struct net *net, struct tipc_aead *aead,
878 struct sk_buff *s 882 struct sk_buff *skb, struct tipc_bearer *b)
879 { 883 {
880 struct tipc_crypto_rx_ctx *rx_ctx; 884 struct tipc_crypto_rx_ctx *rx_ctx;
881 struct aead_request *req; 885 struct aead_request *req;
882 struct crypto_aead *tfm; 886 struct crypto_aead *tfm;
883 struct sk_buff *unused; 887 struct sk_buff *unused;
884 struct scatterlist *sg; 888 struct scatterlist *sg;
885 struct tipc_ehdr *ehdr; 889 struct tipc_ehdr *ehdr;
886 int ehsz, nsg, rc; 890 int ehsz, nsg, rc;
887 void *ctx; 891 void *ctx;
888 u32 salt; 892 u32 salt;
889 u8 *iv; 893 u8 *iv;
890 894
891 if (unlikely(!aead)) 895 if (unlikely(!aead))
892 return -ENOKEY; 896 return -ENOKEY;
893 897
894 nsg = skb_cow_data(skb, 0, &unused); 898 nsg = skb_cow_data(skb, 0, &unused);
895 if (unlikely(nsg < 0)) { 899 if (unlikely(nsg < 0)) {
896 pr_err("RX: skb_cow_data() ret 900 pr_err("RX: skb_cow_data() returned %d\n", nsg);
897 return nsg; 901 return nsg;
898 } 902 }
899 903
900 /* Allocate memory for the AEAD operat 904 /* Allocate memory for the AEAD operation */
901 tfm = tipc_aead_tfm_next(aead); 905 tfm = tipc_aead_tfm_next(aead);
902 ctx = tipc_aead_mem_alloc(tfm, sizeof( 906 ctx = tipc_aead_mem_alloc(tfm, sizeof(*rx_ctx), &iv, &req, &sg, nsg);
903 if (unlikely(!ctx)) 907 if (unlikely(!ctx))
904 return -ENOMEM; 908 return -ENOMEM;
905 TIPC_SKB_CB(skb)->crypto_ctx = ctx; 909 TIPC_SKB_CB(skb)->crypto_ctx = ctx;
906 910
907 /* Map skb to the sg lists */ 911 /* Map skb to the sg lists */
908 sg_init_table(sg, nsg); 912 sg_init_table(sg, nsg);
909 rc = skb_to_sgvec(skb, sg, 0, skb->len 913 rc = skb_to_sgvec(skb, sg, 0, skb->len);
910 if (unlikely(rc < 0)) { 914 if (unlikely(rc < 0)) {
911 pr_err("RX: skb_to_sgvec() ret 915 pr_err("RX: skb_to_sgvec() returned %d, nsg %d\n", rc, nsg);
912 goto exit; 916 goto exit;
913 } 917 }
914 918
915 /* Reconstruct IV: */ 919 /* Reconstruct IV: */
916 ehdr = (struct tipc_ehdr *)skb->data; 920 ehdr = (struct tipc_ehdr *)skb->data;
917 salt = aead->salt; 921 salt = aead->salt;
918 if (aead->mode == CLUSTER_KEY) 922 if (aead->mode == CLUSTER_KEY)
919 salt ^= __be32_to_cpu(ehdr->ad !! 923 salt ^= ehdr->addr; /* __be32 */
920 else if (ehdr->destined) 924 else if (ehdr->destined)
921 salt ^= tipc_own_addr(net); 925 salt ^= tipc_own_addr(net);
922 memcpy(iv, &salt, 4); 926 memcpy(iv, &salt, 4);
923 memcpy(iv + 4, (u8 *)&ehdr->seqno, 8); 927 memcpy(iv + 4, (u8 *)&ehdr->seqno, 8);
924 928
925 /* Prepare request */ 929 /* Prepare request */
926 ehsz = tipc_ehdr_size(ehdr); 930 ehsz = tipc_ehdr_size(ehdr);
927 aead_request_set_tfm(req, tfm); 931 aead_request_set_tfm(req, tfm);
928 aead_request_set_ad(req, ehsz); 932 aead_request_set_ad(req, ehsz);
929 aead_request_set_crypt(req, sg, sg, sk 933 aead_request_set_crypt(req, sg, sg, skb->len - ehsz, iv);
930 934
931 /* Set callback function & data */ 935 /* Set callback function & data */
932 aead_request_set_callback(req, CRYPTO_ 936 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
933 tipc_aead_de 937 tipc_aead_decrypt_done, skb);
934 rx_ctx = (struct tipc_crypto_rx_ctx *) 938 rx_ctx = (struct tipc_crypto_rx_ctx *)ctx;
935 rx_ctx->aead = aead; 939 rx_ctx->aead = aead;
936 rx_ctx->bearer = b; 940 rx_ctx->bearer = b;
937 941
938 /* Hold bearer */ 942 /* Hold bearer */
939 if (unlikely(!tipc_bearer_hold(b))) { 943 if (unlikely(!tipc_bearer_hold(b))) {
940 rc = -ENODEV; 944 rc = -ENODEV;
941 goto exit; 945 goto exit;
942 } 946 }
943 947
944 /* Now, do decrypt */ 948 /* Now, do decrypt */
945 rc = crypto_aead_decrypt(req); 949 rc = crypto_aead_decrypt(req);
946 if (rc == -EINPROGRESS || rc == -EBUSY 950 if (rc == -EINPROGRESS || rc == -EBUSY)
947 return rc; 951 return rc;
948 952
949 tipc_bearer_put(b); 953 tipc_bearer_put(b);
950 954
951 exit: 955 exit:
952 kfree(ctx); 956 kfree(ctx);
953 TIPC_SKB_CB(skb)->crypto_ctx = NULL; 957 TIPC_SKB_CB(skb)->crypto_ctx = NULL;
954 return rc; 958 return rc;
955 } 959 }
956 960
957 static void tipc_aead_decrypt_done(void *data, !! 961 static void tipc_aead_decrypt_done(struct crypto_async_request *base, int err)
958 { 962 {
959 struct sk_buff *skb = data; !! 963 struct sk_buff *skb = base->data;
960 struct tipc_crypto_rx_ctx *rx_ctx = TI 964 struct tipc_crypto_rx_ctx *rx_ctx = TIPC_SKB_CB(skb)->crypto_ctx;
961 struct tipc_bearer *b = rx_ctx->bearer 965 struct tipc_bearer *b = rx_ctx->bearer;
962 struct tipc_aead *aead = rx_ctx->aead; 966 struct tipc_aead *aead = rx_ctx->aead;
963 struct tipc_crypto_stats __percpu *sta 967 struct tipc_crypto_stats __percpu *stats = aead->crypto->stats;
964 struct net *net = aead->crypto->net; 968 struct net *net = aead->crypto->net;
965 969
966 switch (err) { 970 switch (err) {
967 case 0: 971 case 0:
968 this_cpu_inc(stats->stat[STAT_ 972 this_cpu_inc(stats->stat[STAT_ASYNC_OK]);
969 break; 973 break;
970 case -EINPROGRESS: 974 case -EINPROGRESS:
971 return; 975 return;
972 default: 976 default:
973 this_cpu_inc(stats->stat[STAT_ 977 this_cpu_inc(stats->stat[STAT_ASYNC_NOK]);
974 break; 978 break;
975 } 979 }
976 980
977 kfree(rx_ctx); 981 kfree(rx_ctx);
978 tipc_crypto_rcv_complete(net, aead, b, 982 tipc_crypto_rcv_complete(net, aead, b, &skb, err);
979 if (likely(skb)) { 983 if (likely(skb)) {
980 if (likely(test_bit(0, &b->up) 984 if (likely(test_bit(0, &b->up)))
981 tipc_rcv(net, skb, b); 985 tipc_rcv(net, skb, b);
982 else 986 else
983 kfree_skb(skb); 987 kfree_skb(skb);
984 } 988 }
985 989
986 tipc_bearer_put(b); 990 tipc_bearer_put(b);
987 } 991 }
988 992
989 static inline int tipc_ehdr_size(struct tipc_e 993 static inline int tipc_ehdr_size(struct tipc_ehdr *ehdr)
990 { 994 {
991 return (ehdr->user != LINK_CONFIG) ? E 995 return (ehdr->user != LINK_CONFIG) ? EHDR_SIZE : EHDR_CFG_SIZE;
992 } 996 }
993 997
994 /** 998 /**
995 * tipc_ehdr_validate - Validate an encryption 999 * tipc_ehdr_validate - Validate an encryption message
996 * @skb: the message buffer 1000 * @skb: the message buffer
997 * 1001 *
998 * Return: "true" if this is a valid encryptio !! 1002 * Returns "true" if this is a valid encryption message, otherwise "false"
999 */ 1003 */
1000 bool tipc_ehdr_validate(struct sk_buff *skb) 1004 bool tipc_ehdr_validate(struct sk_buff *skb)
1001 { 1005 {
1002 struct tipc_ehdr *ehdr; 1006 struct tipc_ehdr *ehdr;
1003 int ehsz; 1007 int ehsz;
1004 1008
1005 if (unlikely(!pskb_may_pull(skb, EHDR 1009 if (unlikely(!pskb_may_pull(skb, EHDR_MIN_SIZE)))
1006 return false; 1010 return false;
1007 1011
1008 ehdr = (struct tipc_ehdr *)skb->data; 1012 ehdr = (struct tipc_ehdr *)skb->data;
1009 if (unlikely(ehdr->version != TIPC_EV 1013 if (unlikely(ehdr->version != TIPC_EVERSION))
1010 return false; 1014 return false;
1011 ehsz = tipc_ehdr_size(ehdr); 1015 ehsz = tipc_ehdr_size(ehdr);
1012 if (unlikely(!pskb_may_pull(skb, ehsz 1016 if (unlikely(!pskb_may_pull(skb, ehsz)))
1013 return false; 1017 return false;
1014 if (unlikely(skb->len <= ehsz + TIPC_ 1018 if (unlikely(skb->len <= ehsz + TIPC_AES_GCM_TAG_SIZE))
1015 return false; 1019 return false;
1016 1020
1017 return true; 1021 return true;
1018 } 1022 }
1019 1023
1020 /** 1024 /**
1021 * tipc_ehdr_build - Build TIPC encryption me 1025 * tipc_ehdr_build - Build TIPC encryption message header
1022 * @net: struct net 1026 * @net: struct net
1023 * @aead: TX AEAD key to be used for the mess 1027 * @aead: TX AEAD key to be used for the message encryption
1024 * @tx_key: key id used for the message encry 1028 * @tx_key: key id used for the message encryption
1025 * @skb: input/output message skb 1029 * @skb: input/output message skb
1026 * @__rx: RX crypto handle if dest is "known" 1030 * @__rx: RX crypto handle if dest is "known"
1027 * 1031 *
1028 * Return: the header size if the building is 1032 * Return: the header size if the building is successful, otherwise < 0
1029 */ 1033 */
1030 static int tipc_ehdr_build(struct net *net, s 1034 static int tipc_ehdr_build(struct net *net, struct tipc_aead *aead,
1031 u8 tx_key, struct 1035 u8 tx_key, struct sk_buff *skb,
1032 struct tipc_crypto 1036 struct tipc_crypto *__rx)
1033 { 1037 {
1034 struct tipc_msg *hdr = buf_msg(skb); 1038 struct tipc_msg *hdr = buf_msg(skb);
1035 struct tipc_ehdr *ehdr; 1039 struct tipc_ehdr *ehdr;
1036 u32 user = msg_user(hdr); 1040 u32 user = msg_user(hdr);
1037 u64 seqno; 1041 u64 seqno;
1038 int ehsz; 1042 int ehsz;
1039 1043
1040 /* Make room for encryption header */ 1044 /* Make room for encryption header */
1041 ehsz = (user != LINK_CONFIG) ? EHDR_S 1045 ehsz = (user != LINK_CONFIG) ? EHDR_SIZE : EHDR_CFG_SIZE;
1042 WARN_ON(skb_headroom(skb) < ehsz); 1046 WARN_ON(skb_headroom(skb) < ehsz);
1043 ehdr = (struct tipc_ehdr *)skb_push(s 1047 ehdr = (struct tipc_ehdr *)skb_push(skb, ehsz);
1044 1048
1045 /* Obtain a seqno first: 1049 /* Obtain a seqno first:
1046 * Use the key seqno (= cluster wise) 1050 * Use the key seqno (= cluster wise) if dest is unknown or we're in
1047 * cluster key mode, otherwise it's b 1051 * cluster key mode, otherwise it's better for a per-peer seqno!
1048 */ 1052 */
1049 if (!__rx || aead->mode == CLUSTER_KE 1053 if (!__rx || aead->mode == CLUSTER_KEY)
1050 seqno = atomic64_inc_return(& 1054 seqno = atomic64_inc_return(&aead->seqno);
1051 else 1055 else
1052 seqno = atomic64_inc_return(& 1056 seqno = atomic64_inc_return(&__rx->sndnxt);
1053 1057
1054 /* Revoke the key if seqno is wrapped 1058 /* Revoke the key if seqno is wrapped around */
1055 if (unlikely(!seqno)) 1059 if (unlikely(!seqno))
1056 return tipc_crypto_key_revoke 1060 return tipc_crypto_key_revoke(net, tx_key);
1057 1061
1058 /* Word 1-2 */ 1062 /* Word 1-2 */
1059 ehdr->seqno = cpu_to_be64(seqno); 1063 ehdr->seqno = cpu_to_be64(seqno);
1060 1064
1061 /* Words 0, 3- */ 1065 /* Words 0, 3- */
1062 ehdr->version = TIPC_EVERSION; 1066 ehdr->version = TIPC_EVERSION;
1063 ehdr->user = 0; 1067 ehdr->user = 0;
1064 ehdr->keepalive = 0; 1068 ehdr->keepalive = 0;
1065 ehdr->tx_key = tx_key; 1069 ehdr->tx_key = tx_key;
1066 ehdr->destined = (__rx) ? 1 : 0; 1070 ehdr->destined = (__rx) ? 1 : 0;
1067 ehdr->rx_key_active = (__rx) ? __rx-> 1071 ehdr->rx_key_active = (__rx) ? __rx->key.active : 0;
1068 ehdr->rx_nokey = (__rx) ? __rx->nokey 1072 ehdr->rx_nokey = (__rx) ? __rx->nokey : 0;
1069 ehdr->master_key = aead->crypto->key_ 1073 ehdr->master_key = aead->crypto->key_master;
1070 ehdr->reserved_1 = 0; 1074 ehdr->reserved_1 = 0;
1071 ehdr->reserved_2 = 0; 1075 ehdr->reserved_2 = 0;
1072 1076
1073 switch (user) { 1077 switch (user) {
1074 case LINK_CONFIG: 1078 case LINK_CONFIG:
1075 ehdr->user = LINK_CONFIG; 1079 ehdr->user = LINK_CONFIG;
1076 memcpy(ehdr->id, tipc_own_id( 1080 memcpy(ehdr->id, tipc_own_id(net), NODE_ID_LEN);
1077 break; 1081 break;
1078 default: 1082 default:
1079 if (user == LINK_PROTOCOL && 1083 if (user == LINK_PROTOCOL && msg_type(hdr) == STATE_MSG) {
1080 ehdr->user = LINK_PRO 1084 ehdr->user = LINK_PROTOCOL;
1081 ehdr->keepalive = msg 1085 ehdr->keepalive = msg_is_keepalive(hdr);
1082 } 1086 }
1083 ehdr->addr = hdr->hdr[3]; 1087 ehdr->addr = hdr->hdr[3];
1084 break; 1088 break;
1085 } 1089 }
1086 1090
1087 return ehsz; 1091 return ehsz;
1088 } 1092 }
1089 1093
1090 static inline void tipc_crypto_key_set_state( 1094 static inline void tipc_crypto_key_set_state(struct tipc_crypto *c,
1091 1095 u8 new_passive,
1092 1096 u8 new_active,
1093 1097 u8 new_pending)
1094 { 1098 {
1095 struct tipc_key old = c->key; 1099 struct tipc_key old = c->key;
1096 char buf[32]; 1100 char buf[32];
1097 1101
1098 c->key.keys = ((new_passive & KEY_MAS 1102 c->key.keys = ((new_passive & KEY_MASK) << (KEY_BITS * 2)) |
1099 ((new_active & KEY_MAS 1103 ((new_active & KEY_MASK) << (KEY_BITS)) |
1100 ((new_pending & KEY_MAS 1104 ((new_pending & KEY_MASK));
1101 1105
1102 pr_debug("%s: key changing %s ::%pS\n 1106 pr_debug("%s: key changing %s ::%pS\n", c->name,
1103 tipc_key_change_dump(old, c- 1107 tipc_key_change_dump(old, c->key, buf),
1104 __builtin_return_address(0)) 1108 __builtin_return_address(0));
1105 } 1109 }
1106 1110
1107 /** 1111 /**
1108 * tipc_crypto_key_init - Initiate a new user 1112 * tipc_crypto_key_init - Initiate a new user / AEAD key
1109 * @c: TIPC crypto to which new key is attach 1113 * @c: TIPC crypto to which new key is attached
1110 * @ukey: the user key 1114 * @ukey: the user key
1111 * @mode: the key mode (CLUSTER_KEY or PER_NO 1115 * @mode: the key mode (CLUSTER_KEY or PER_NODE_KEY)
1112 * @master_key: specify this is a cluster mas 1116 * @master_key: specify this is a cluster master key
1113 * 1117 *
1114 * A new TIPC AEAD key will be allocated and 1118 * A new TIPC AEAD key will be allocated and initiated with the specified user
1115 * key, then attached to the TIPC crypto. 1119 * key, then attached to the TIPC crypto.
1116 * 1120 *
1117 * Return: new key id in case of success, oth 1121 * Return: new key id in case of success, otherwise: < 0
1118 */ 1122 */
1119 int tipc_crypto_key_init(struct tipc_crypto * 1123 int tipc_crypto_key_init(struct tipc_crypto *c, struct tipc_aead_key *ukey,
1120 u8 mode, bool master 1124 u8 mode, bool master_key)
1121 { 1125 {
1122 struct tipc_aead *aead = NULL; 1126 struct tipc_aead *aead = NULL;
1123 int rc = 0; 1127 int rc = 0;
1124 1128
1125 /* Initiate with the new user key */ 1129 /* Initiate with the new user key */
1126 rc = tipc_aead_init(&aead, ukey, mode 1130 rc = tipc_aead_init(&aead, ukey, mode);
1127 1131
1128 /* Attach it to the crypto */ 1132 /* Attach it to the crypto */
1129 if (likely(!rc)) { 1133 if (likely(!rc)) {
1130 rc = tipc_crypto_key_attach(c 1134 rc = tipc_crypto_key_attach(c, aead, 0, master_key);
1131 if (rc < 0) 1135 if (rc < 0)
1132 tipc_aead_free(&aead- 1136 tipc_aead_free(&aead->rcu);
1133 } 1137 }
1134 1138
1135 return rc; 1139 return rc;
1136 } 1140 }
1137 1141
1138 /** 1142 /**
1139 * tipc_crypto_key_attach - Attach a new AEAD 1143 * tipc_crypto_key_attach - Attach a new AEAD key to TIPC crypto
1140 * @c: TIPC crypto to which the new AEAD key 1144 * @c: TIPC crypto to which the new AEAD key is attached
1141 * @aead: the new AEAD key pointer 1145 * @aead: the new AEAD key pointer
1142 * @pos: desired slot in the crypto key array 1146 * @pos: desired slot in the crypto key array, = 0 if any!
1143 * @master_key: specify this is a cluster mas 1147 * @master_key: specify this is a cluster master key
1144 * 1148 *
1145 * Return: new key id in case of success, oth 1149 * Return: new key id in case of success, otherwise: -EBUSY
1146 */ 1150 */
1147 static int tipc_crypto_key_attach(struct tipc 1151 static int tipc_crypto_key_attach(struct tipc_crypto *c,
1148 struct tipc 1152 struct tipc_aead *aead, u8 pos,
1149 bool master 1153 bool master_key)
1150 { 1154 {
1151 struct tipc_key key; 1155 struct tipc_key key;
1152 int rc = -EBUSY; 1156 int rc = -EBUSY;
1153 u8 new_key; 1157 u8 new_key;
1154 1158
1155 spin_lock_bh(&c->lock); 1159 spin_lock_bh(&c->lock);
1156 key = c->key; 1160 key = c->key;
1157 if (master_key) { 1161 if (master_key) {
1158 new_key = KEY_MASTER; 1162 new_key = KEY_MASTER;
1159 goto attach; 1163 goto attach;
1160 } 1164 }
1161 if (key.active && key.passive) 1165 if (key.active && key.passive)
1162 goto exit; 1166 goto exit;
1163 if (key.pending) { 1167 if (key.pending) {
1164 if (tipc_aead_users(c->aead[k 1168 if (tipc_aead_users(c->aead[key.pending]) > 0)
1165 goto exit; 1169 goto exit;
1166 /* if (pos): ok with replacin 1170 /* if (pos): ok with replacing, will be aligned when needed */
1167 /* Replace it */ 1171 /* Replace it */
1168 new_key = key.pending; 1172 new_key = key.pending;
1169 } else { 1173 } else {
1170 if (pos) { 1174 if (pos) {
1171 if (key.active && pos 1175 if (key.active && pos != key_next(key.active)) {
1172 key.passive = 1176 key.passive = pos;
1173 new_key = pos 1177 new_key = pos;
1174 goto attach; 1178 goto attach;
1175 } else if (!key.activ 1179 } else if (!key.active && !key.passive) {
1176 key.pending = 1180 key.pending = pos;
1177 new_key = pos 1181 new_key = pos;
1178 goto attach; 1182 goto attach;
1179 } 1183 }
1180 } 1184 }
1181 key.pending = key_next(key.ac 1185 key.pending = key_next(key.active ?: key.passive);
1182 new_key = key.pending; 1186 new_key = key.pending;
1183 } 1187 }
1184 1188
1185 attach: 1189 attach:
1186 aead->crypto = c; 1190 aead->crypto = c;
1187 aead->gen = (is_tx(c)) ? ++c->key_gen 1191 aead->gen = (is_tx(c)) ? ++c->key_gen : c->key_gen;
1188 tipc_aead_rcu_replace(c->aead[new_key 1192 tipc_aead_rcu_replace(c->aead[new_key], aead, &c->lock);
1189 if (likely(c->key.keys != key.keys)) 1193 if (likely(c->key.keys != key.keys))
1190 tipc_crypto_key_set_state(c, 1194 tipc_crypto_key_set_state(c, key.passive, key.active,
1191 key 1195 key.pending);
1192 c->working = 1; 1196 c->working = 1;
1193 c->nokey = 0; 1197 c->nokey = 0;
1194 c->key_master |= master_key; 1198 c->key_master |= master_key;
1195 rc = new_key; 1199 rc = new_key;
1196 1200
1197 exit: 1201 exit:
1198 spin_unlock_bh(&c->lock); 1202 spin_unlock_bh(&c->lock);
1199 return rc; 1203 return rc;
1200 } 1204 }
1201 1205
1202 void tipc_crypto_key_flush(struct tipc_crypto 1206 void tipc_crypto_key_flush(struct tipc_crypto *c)
1203 { 1207 {
1204 struct tipc_crypto *tx, *rx; 1208 struct tipc_crypto *tx, *rx;
1205 int k; 1209 int k;
1206 1210
1207 spin_lock_bh(&c->lock); 1211 spin_lock_bh(&c->lock);
1208 if (is_rx(c)) { 1212 if (is_rx(c)) {
1209 /* Try to cancel pending work 1213 /* Try to cancel pending work */
1210 rx = c; 1214 rx = c;
1211 tx = tipc_net(rx->net)->crypt 1215 tx = tipc_net(rx->net)->crypto_tx;
1212 if (cancel_delayed_work(&rx-> 1216 if (cancel_delayed_work(&rx->work)) {
1213 kfree(rx->skey); 1217 kfree(rx->skey);
1214 rx->skey = NULL; 1218 rx->skey = NULL;
1215 atomic_xchg(&rx->key_ 1219 atomic_xchg(&rx->key_distr, 0);
1216 tipc_node_put(rx->nod 1220 tipc_node_put(rx->node);
1217 } 1221 }
1218 /* RX stopping => decrease TX 1222 /* RX stopping => decrease TX key users if any */
1219 k = atomic_xchg(&rx->peer_rx_ 1223 k = atomic_xchg(&rx->peer_rx_active, 0);
1220 if (k) { 1224 if (k) {
1221 tipc_aead_users_dec(t 1225 tipc_aead_users_dec(tx->aead[k], 0);
1222 /* Mark the point TX 1226 /* Mark the point TX key users changed */
1223 tx->timer1 = jiffies; 1227 tx->timer1 = jiffies;
1224 } 1228 }
1225 } 1229 }
1226 1230
1227 c->flags = 0; 1231 c->flags = 0;
1228 tipc_crypto_key_set_state(c, 0, 0, 0) 1232 tipc_crypto_key_set_state(c, 0, 0, 0);
1229 for (k = KEY_MIN; k <= KEY_MAX; k++) 1233 for (k = KEY_MIN; k <= KEY_MAX; k++)
1230 tipc_crypto_key_detach(c->aea 1234 tipc_crypto_key_detach(c->aead[k], &c->lock);
1231 atomic64_set(&c->sndnxt, 0); 1235 atomic64_set(&c->sndnxt, 0);
1232 spin_unlock_bh(&c->lock); 1236 spin_unlock_bh(&c->lock);
1233 } 1237 }
1234 1238
1235 /** 1239 /**
1236 * tipc_crypto_key_try_align - Align RX keys 1240 * tipc_crypto_key_try_align - Align RX keys if possible
1237 * @rx: RX crypto handle 1241 * @rx: RX crypto handle
1238 * @new_pending: new pending slot if aligned 1242 * @new_pending: new pending slot if aligned (= TX key from peer)
1239 * 1243 *
1240 * Peer has used an unknown key slot, this on 1244 * Peer has used an unknown key slot, this only happens when peer has left and
1241 * rejoned, or we are newcomer. 1245 * rejoned, or we are newcomer.
1242 * That means, there must be no active key bu 1246 * That means, there must be no active key but a pending key at unaligned slot.
1243 * If so, we try to move the pending key to t 1247 * If so, we try to move the pending key to the new slot.
1244 * Note: A potential passive key can exist, i 1248 * Note: A potential passive key can exist, it will be shifted correspondingly!
1245 * 1249 *
1246 * Return: "true" if key is successfully alig 1250 * Return: "true" if key is successfully aligned, otherwise "false"
1247 */ 1251 */
1248 static bool tipc_crypto_key_try_align(struct 1252 static bool tipc_crypto_key_try_align(struct tipc_crypto *rx, u8 new_pending)
1249 { 1253 {
1250 struct tipc_aead *tmp1, *tmp2 = NULL; 1254 struct tipc_aead *tmp1, *tmp2 = NULL;
1251 struct tipc_key key; 1255 struct tipc_key key;
1252 bool aligned = false; 1256 bool aligned = false;
1253 u8 new_passive = 0; 1257 u8 new_passive = 0;
1254 int x; 1258 int x;
1255 1259
1256 spin_lock(&rx->lock); 1260 spin_lock(&rx->lock);
1257 key = rx->key; 1261 key = rx->key;
1258 if (key.pending == new_pending) { 1262 if (key.pending == new_pending) {
1259 aligned = true; 1263 aligned = true;
1260 goto exit; 1264 goto exit;
1261 } 1265 }
1262 if (key.active) 1266 if (key.active)
1263 goto exit; 1267 goto exit;
1264 if (!key.pending) 1268 if (!key.pending)
1265 goto exit; 1269 goto exit;
1266 if (tipc_aead_users(rx->aead[key.pend 1270 if (tipc_aead_users(rx->aead[key.pending]) > 0)
1267 goto exit; 1271 goto exit;
1268 1272
1269 /* Try to "isolate" this pending key 1273 /* Try to "isolate" this pending key first */
1270 tmp1 = tipc_aead_rcu_ptr(rx->aead[key 1274 tmp1 = tipc_aead_rcu_ptr(rx->aead[key.pending], &rx->lock);
1271 if (!refcount_dec_if_one(&tmp1->refcn 1275 if (!refcount_dec_if_one(&tmp1->refcnt))
1272 goto exit; 1276 goto exit;
1273 rcu_assign_pointer(rx->aead[key.pendi 1277 rcu_assign_pointer(rx->aead[key.pending], NULL);
1274 1278
1275 /* Move passive key if any */ 1279 /* Move passive key if any */
1276 if (key.passive) { 1280 if (key.passive) {
1277 tmp2 = rcu_replace_pointer(rx 1281 tmp2 = rcu_replace_pointer(rx->aead[key.passive], tmp2, lockdep_is_held(&rx->lock));
1278 x = (key.passive - key.pendin 1282 x = (key.passive - key.pending + new_pending) % KEY_MAX;
1279 new_passive = (x <= 0) ? x + 1283 new_passive = (x <= 0) ? x + KEY_MAX : x;
1280 } 1284 }
1281 1285
1282 /* Re-allocate the key(s) */ 1286 /* Re-allocate the key(s) */
1283 tipc_crypto_key_set_state(rx, new_pas 1287 tipc_crypto_key_set_state(rx, new_passive, 0, new_pending);
1284 rcu_assign_pointer(rx->aead[new_pendi 1288 rcu_assign_pointer(rx->aead[new_pending], tmp1);
1285 if (new_passive) 1289 if (new_passive)
1286 rcu_assign_pointer(rx->aead[n 1290 rcu_assign_pointer(rx->aead[new_passive], tmp2);
1287 refcount_set(&tmp1->refcnt, 1); 1291 refcount_set(&tmp1->refcnt, 1);
1288 aligned = true; 1292 aligned = true;
1289 pr_info_ratelimited("%s: key[%d] -> k 1293 pr_info_ratelimited("%s: key[%d] -> key[%d]\n", rx->name, key.pending,
1290 new_pending); 1294 new_pending);
1291 1295
1292 exit: 1296 exit:
1293 spin_unlock(&rx->lock); 1297 spin_unlock(&rx->lock);
1294 return aligned; 1298 return aligned;
1295 } 1299 }
1296 1300
1297 /** 1301 /**
1298 * tipc_crypto_key_pick_tx - Pick one TX key 1302 * tipc_crypto_key_pick_tx - Pick one TX key for message decryption
1299 * @tx: TX crypto handle 1303 * @tx: TX crypto handle
1300 * @rx: RX crypto handle (can be NULL) 1304 * @rx: RX crypto handle (can be NULL)
1301 * @skb: the message skb which will be decryp 1305 * @skb: the message skb which will be decrypted later
1302 * @tx_key: peer TX key id 1306 * @tx_key: peer TX key id
1303 * 1307 *
1304 * This function looks up the existing TX key 1308 * This function looks up the existing TX keys and pick one which is suitable
1305 * for the message decryption, that must be a 1309 * for the message decryption, that must be a cluster key and not used before
1306 * on the same message (i.e. recursive). 1310 * on the same message (i.e. recursive).
1307 * 1311 *
1308 * Return: the TX AEAD key handle in case of 1312 * Return: the TX AEAD key handle in case of success, otherwise NULL
1309 */ 1313 */
1310 static struct tipc_aead *tipc_crypto_key_pick 1314 static struct tipc_aead *tipc_crypto_key_pick_tx(struct tipc_crypto *tx,
1311 1315 struct tipc_crypto *rx,
1312 1316 struct sk_buff *skb,
1313 1317 u8 tx_key)
1314 { 1318 {
1315 struct tipc_skb_cb *skb_cb = TIPC_SKB 1319 struct tipc_skb_cb *skb_cb = TIPC_SKB_CB(skb);
1316 struct tipc_aead *aead = NULL; 1320 struct tipc_aead *aead = NULL;
1317 struct tipc_key key = tx->key; 1321 struct tipc_key key = tx->key;
1318 u8 k, i = 0; 1322 u8 k, i = 0;
1319 1323
1320 /* Initialize data if not yet */ 1324 /* Initialize data if not yet */
1321 if (!skb_cb->tx_clone_deferred) { 1325 if (!skb_cb->tx_clone_deferred) {
1322 skb_cb->tx_clone_deferred = 1 1326 skb_cb->tx_clone_deferred = 1;
1323 memset(&skb_cb->tx_clone_ctx, 1327 memset(&skb_cb->tx_clone_ctx, 0, sizeof(skb_cb->tx_clone_ctx));
1324 } 1328 }
1325 1329
1326 skb_cb->tx_clone_ctx.rx = rx; 1330 skb_cb->tx_clone_ctx.rx = rx;
1327 if (++skb_cb->tx_clone_ctx.recurs > 2 1331 if (++skb_cb->tx_clone_ctx.recurs > 2)
1328 return NULL; 1332 return NULL;
1329 1333
1330 /* Pick one TX key */ 1334 /* Pick one TX key */
1331 spin_lock(&tx->lock); 1335 spin_lock(&tx->lock);
1332 if (tx_key == KEY_MASTER) { 1336 if (tx_key == KEY_MASTER) {
1333 aead = tipc_aead_rcu_ptr(tx-> 1337 aead = tipc_aead_rcu_ptr(tx->aead[KEY_MASTER], &tx->lock);
1334 goto done; 1338 goto done;
1335 } 1339 }
1336 do { 1340 do {
1337 k = (i == 0) ? key.pending : 1341 k = (i == 0) ? key.pending :
1338 ((i == 1) ? key.activ 1342 ((i == 1) ? key.active : key.passive);
1339 if (!k) 1343 if (!k)
1340 continue; 1344 continue;
1341 aead = tipc_aead_rcu_ptr(tx-> 1345 aead = tipc_aead_rcu_ptr(tx->aead[k], &tx->lock);
1342 if (!aead) 1346 if (!aead)
1343 continue; 1347 continue;
1344 if (aead->mode != CLUSTER_KEY 1348 if (aead->mode != CLUSTER_KEY ||
1345 aead == skb_cb->tx_clone_ 1349 aead == skb_cb->tx_clone_ctx.last) {
1346 aead = NULL; 1350 aead = NULL;
1347 continue; 1351 continue;
1348 } 1352 }
1349 /* Ok, found one cluster key 1353 /* Ok, found one cluster key */
1350 skb_cb->tx_clone_ctx.last = a 1354 skb_cb->tx_clone_ctx.last = aead;
1351 WARN_ON(skb->next); 1355 WARN_ON(skb->next);
1352 skb->next = skb_clone(skb, GF 1356 skb->next = skb_clone(skb, GFP_ATOMIC);
1353 if (unlikely(!skb->next)) 1357 if (unlikely(!skb->next))
1354 pr_warn("Failed to cl 1358 pr_warn("Failed to clone skb for next round if any\n");
1355 break; 1359 break;
1356 } while (++i < 3); 1360 } while (++i < 3);
1357 1361
1358 done: 1362 done:
1359 if (likely(aead)) 1363 if (likely(aead))
1360 WARN_ON(!refcount_inc_not_zer 1364 WARN_ON(!refcount_inc_not_zero(&aead->refcnt));
1361 spin_unlock(&tx->lock); 1365 spin_unlock(&tx->lock);
1362 1366
1363 return aead; 1367 return aead;
1364 } 1368 }
1365 1369
1366 /** 1370 /**
1367 * tipc_crypto_key_synch: Synch own key data 1371 * tipc_crypto_key_synch: Synch own key data according to peer key status
1368 * @rx: RX crypto handle 1372 * @rx: RX crypto handle
1369 * @skb: TIPCv2 message buffer (incl. the ehd 1373 * @skb: TIPCv2 message buffer (incl. the ehdr from peer)
1370 * 1374 *
1371 * This function updates the peer node relate 1375 * This function updates the peer node related data as the peer RX active key
1372 * has changed, so the number of TX keys' use 1376 * has changed, so the number of TX keys' users on this node are increased and
1373 * decreased correspondingly. 1377 * decreased correspondingly.
1374 * 1378 *
1375 * It also considers if peer has no key, then 1379 * It also considers if peer has no key, then we need to make own master key
1376 * (if any) taking over i.e. starting grace p 1380 * (if any) taking over i.e. starting grace period and also trigger key
1377 * distributing process. 1381 * distributing process.
1378 * 1382 *
1379 * The "per-peer" sndnxt is also reset when t 1383 * The "per-peer" sndnxt is also reset when the peer key has switched.
1380 */ 1384 */
1381 static void tipc_crypto_key_synch(struct tipc 1385 static void tipc_crypto_key_synch(struct tipc_crypto *rx, struct sk_buff *skb)
1382 { 1386 {
1383 struct tipc_ehdr *ehdr = (struct tipc 1387 struct tipc_ehdr *ehdr = (struct tipc_ehdr *)skb_network_header(skb);
1384 struct tipc_crypto *tx = tipc_net(rx- 1388 struct tipc_crypto *tx = tipc_net(rx->net)->crypto_tx;
1385 struct tipc_msg *hdr = buf_msg(skb); 1389 struct tipc_msg *hdr = buf_msg(skb);
1386 u32 self = tipc_own_addr(rx->net); 1390 u32 self = tipc_own_addr(rx->net);
1387 u8 cur, new; 1391 u8 cur, new;
1388 unsigned long delay; 1392 unsigned long delay;
1389 1393
1390 /* Update RX 'key_master' flag accord 1394 /* Update RX 'key_master' flag according to peer, also mark "legacy" if
1391 * a peer has no master key. 1395 * a peer has no master key.
1392 */ 1396 */
1393 rx->key_master = ehdr->master_key; 1397 rx->key_master = ehdr->master_key;
1394 if (!rx->key_master) 1398 if (!rx->key_master)
1395 tx->legacy_user = 1; 1399 tx->legacy_user = 1;
1396 1400
1397 /* For later cases, apply only if mes 1401 /* For later cases, apply only if message is destined to this node */
1398 if (!ehdr->destined || msg_short(hdr) 1402 if (!ehdr->destined || msg_short(hdr) || msg_destnode(hdr) != self)
1399 return; 1403 return;
1400 1404
1401 /* Case 1: Peer has no keys, let's ma 1405 /* Case 1: Peer has no keys, let's make master key take over */
1402 if (ehdr->rx_nokey) { 1406 if (ehdr->rx_nokey) {
1403 /* Set or extend grace period 1407 /* Set or extend grace period */
1404 tx->timer2 = jiffies; 1408 tx->timer2 = jiffies;
1405 /* Schedule key distributing 1409 /* Schedule key distributing for the peer if not yet */
1406 if (tx->key.keys && 1410 if (tx->key.keys &&
1407 !atomic_cmpxchg(&rx->key_ 1411 !atomic_cmpxchg(&rx->key_distr, 0, KEY_DISTR_SCHED)) {
1408 get_random_bytes(&del 1412 get_random_bytes(&delay, 2);
1409 delay %= 5; 1413 delay %= 5;
1410 delay = msecs_to_jiff 1414 delay = msecs_to_jiffies(500 * ++delay);
1411 if (queue_delayed_wor 1415 if (queue_delayed_work(tx->wq, &rx->work, delay))
1412 tipc_node_get 1416 tipc_node_get(rx->node);
1413 } 1417 }
1414 } else { 1418 } else {
1415 /* Cancel a pending key distr 1419 /* Cancel a pending key distributing if any */
1416 atomic_xchg(&rx->key_distr, 0 1420 atomic_xchg(&rx->key_distr, 0);
1417 } 1421 }
1418 1422
1419 /* Case 2: Peer RX active key has cha 1423 /* Case 2: Peer RX active key has changed, let's update own TX users */
1420 cur = atomic_read(&rx->peer_rx_active 1424 cur = atomic_read(&rx->peer_rx_active);
1421 new = ehdr->rx_key_active; 1425 new = ehdr->rx_key_active;
1422 if (tx->key.keys && 1426 if (tx->key.keys &&
1423 cur != new && 1427 cur != new &&
1424 atomic_cmpxchg(&rx->peer_rx_activ 1428 atomic_cmpxchg(&rx->peer_rx_active, cur, new) == cur) {
1425 if (new) 1429 if (new)
1426 tipc_aead_users_inc(t 1430 tipc_aead_users_inc(tx->aead[new], INT_MAX);
1427 if (cur) 1431 if (cur)
1428 tipc_aead_users_dec(t 1432 tipc_aead_users_dec(tx->aead[cur], 0);
1429 1433
1430 atomic64_set(&rx->sndnxt, 0); 1434 atomic64_set(&rx->sndnxt, 0);
1431 /* Mark the point TX key user 1435 /* Mark the point TX key users changed */
1432 tx->timer1 = jiffies; 1436 tx->timer1 = jiffies;
1433 1437
1434 pr_debug("%s: key users chang 1438 pr_debug("%s: key users changed %d-- %d++, peer %s\n",
1435 tx->name, cur, new, 1439 tx->name, cur, new, rx->name);
1436 } 1440 }
1437 } 1441 }
1438 1442
1439 static int tipc_crypto_key_revoke(struct net 1443 static int tipc_crypto_key_revoke(struct net *net, u8 tx_key)
1440 { 1444 {
1441 struct tipc_crypto *tx = tipc_net(net 1445 struct tipc_crypto *tx = tipc_net(net)->crypto_tx;
1442 struct tipc_key key; 1446 struct tipc_key key;
1443 1447
1444 spin_lock_bh(&tx->lock); 1448 spin_lock_bh(&tx->lock);
1445 key = tx->key; 1449 key = tx->key;
1446 WARN_ON(!key.active || tx_key != key. 1450 WARN_ON(!key.active || tx_key != key.active);
1447 1451
1448 /* Free the active key */ 1452 /* Free the active key */
1449 tipc_crypto_key_set_state(tx, key.pas 1453 tipc_crypto_key_set_state(tx, key.passive, 0, key.pending);
1450 tipc_crypto_key_detach(tx->aead[key.a 1454 tipc_crypto_key_detach(tx->aead[key.active], &tx->lock);
1451 spin_unlock_bh(&tx->lock); 1455 spin_unlock_bh(&tx->lock);
1452 1456
1453 pr_warn("%s: key is revoked\n", tx->n 1457 pr_warn("%s: key is revoked\n", tx->name);
1454 return -EKEYREVOKED; 1458 return -EKEYREVOKED;
1455 } 1459 }
1456 1460
1457 int tipc_crypto_start(struct tipc_crypto **cr 1461 int tipc_crypto_start(struct tipc_crypto **crypto, struct net *net,
1458 struct tipc_node *node) 1462 struct tipc_node *node)
1459 { 1463 {
1460 struct tipc_crypto *c; 1464 struct tipc_crypto *c;
1461 1465
1462 if (*crypto) 1466 if (*crypto)
1463 return -EEXIST; 1467 return -EEXIST;
1464 1468
1465 /* Allocate crypto */ 1469 /* Allocate crypto */
1466 c = kzalloc(sizeof(*c), GFP_ATOMIC); 1470 c = kzalloc(sizeof(*c), GFP_ATOMIC);
1467 if (!c) 1471 if (!c)
1468 return -ENOMEM; 1472 return -ENOMEM;
1469 1473
1470 /* Allocate workqueue on TX */ 1474 /* Allocate workqueue on TX */
1471 if (!node) { 1475 if (!node) {
1472 c->wq = alloc_ordered_workque 1476 c->wq = alloc_ordered_workqueue("tipc_crypto", 0);
1473 if (!c->wq) { 1477 if (!c->wq) {
1474 kfree(c); 1478 kfree(c);
1475 return -ENOMEM; 1479 return -ENOMEM;
1476 } 1480 }
1477 } 1481 }
1478 1482
1479 /* Allocate statistic structure */ 1483 /* Allocate statistic structure */
1480 c->stats = alloc_percpu_gfp(struct ti 1484 c->stats = alloc_percpu_gfp(struct tipc_crypto_stats, GFP_ATOMIC);
1481 if (!c->stats) { 1485 if (!c->stats) {
1482 if (c->wq) 1486 if (c->wq)
1483 destroy_workqueue(c-> 1487 destroy_workqueue(c->wq);
1484 kfree_sensitive(c); 1488 kfree_sensitive(c);
1485 return -ENOMEM; 1489 return -ENOMEM;
1486 } 1490 }
1487 1491
1488 c->flags = 0; 1492 c->flags = 0;
1489 c->net = net; 1493 c->net = net;
1490 c->node = node; 1494 c->node = node;
1491 get_random_bytes(&c->key_gen, 2); 1495 get_random_bytes(&c->key_gen, 2);
1492 tipc_crypto_key_set_state(c, 0, 0, 0) 1496 tipc_crypto_key_set_state(c, 0, 0, 0);
1493 atomic_set(&c->key_distr, 0); 1497 atomic_set(&c->key_distr, 0);
1494 atomic_set(&c->peer_rx_active, 0); 1498 atomic_set(&c->peer_rx_active, 0);
1495 atomic64_set(&c->sndnxt, 0); 1499 atomic64_set(&c->sndnxt, 0);
1496 c->timer1 = jiffies; 1500 c->timer1 = jiffies;
1497 c->timer2 = jiffies; 1501 c->timer2 = jiffies;
1498 c->rekeying_intv = TIPC_REKEYING_INTV 1502 c->rekeying_intv = TIPC_REKEYING_INTV_DEF;
1499 spin_lock_init(&c->lock); 1503 spin_lock_init(&c->lock);
1500 scnprintf(c->name, 48, "%s(%s)", (is_ 1504 scnprintf(c->name, 48, "%s(%s)", (is_rx(c)) ? "RX" : "TX",
1501 (is_rx(c)) ? tipc_node_get_ 1505 (is_rx(c)) ? tipc_node_get_id_str(c->node) :
1502 tipc_own_id_st 1506 tipc_own_id_string(c->net));
1503 1507
1504 if (is_rx(c)) 1508 if (is_rx(c))
1505 INIT_DELAYED_WORK(&c->work, t 1509 INIT_DELAYED_WORK(&c->work, tipc_crypto_work_rx);
1506 else 1510 else
1507 INIT_DELAYED_WORK(&c->work, t 1511 INIT_DELAYED_WORK(&c->work, tipc_crypto_work_tx);
1508 1512
1509 *crypto = c; 1513 *crypto = c;
1510 return 0; 1514 return 0;
1511 } 1515 }
1512 1516
1513 void tipc_crypto_stop(struct tipc_crypto **cr 1517 void tipc_crypto_stop(struct tipc_crypto **crypto)
1514 { 1518 {
1515 struct tipc_crypto *c = *crypto; 1519 struct tipc_crypto *c = *crypto;
1516 u8 k; 1520 u8 k;
1517 1521
1518 if (!c) 1522 if (!c)
1519 return; 1523 return;
1520 1524
1521 /* Flush any queued works & destroy w 1525 /* Flush any queued works & destroy wq */
1522 if (is_tx(c)) { 1526 if (is_tx(c)) {
1523 c->rekeying_intv = 0; 1527 c->rekeying_intv = 0;
1524 cancel_delayed_work_sync(&c-> 1528 cancel_delayed_work_sync(&c->work);
1525 destroy_workqueue(c->wq); 1529 destroy_workqueue(c->wq);
1526 } 1530 }
1527 1531
1528 /* Release AEAD keys */ 1532 /* Release AEAD keys */
1529 rcu_read_lock(); 1533 rcu_read_lock();
1530 for (k = KEY_MIN; k <= KEY_MAX; k++) 1534 for (k = KEY_MIN; k <= KEY_MAX; k++)
1531 tipc_aead_put(rcu_dereference 1535 tipc_aead_put(rcu_dereference(c->aead[k]));
1532 rcu_read_unlock(); 1536 rcu_read_unlock();
1533 pr_debug("%s: has been stopped\n", c- 1537 pr_debug("%s: has been stopped\n", c->name);
1534 1538
1535 /* Free this crypto statistics */ 1539 /* Free this crypto statistics */
1536 free_percpu(c->stats); 1540 free_percpu(c->stats);
1537 1541
1538 *crypto = NULL; 1542 *crypto = NULL;
1539 kfree_sensitive(c); 1543 kfree_sensitive(c);
1540 } 1544 }
1541 1545
1542 void tipc_crypto_timeout(struct tipc_crypto * 1546 void tipc_crypto_timeout(struct tipc_crypto *rx)
1543 { 1547 {
1544 struct tipc_net *tn = tipc_net(rx->ne 1548 struct tipc_net *tn = tipc_net(rx->net);
1545 struct tipc_crypto *tx = tn->crypto_t 1549 struct tipc_crypto *tx = tn->crypto_tx;
1546 struct tipc_key key; 1550 struct tipc_key key;
1547 int cmd; 1551 int cmd;
1548 1552
1549 /* TX pending: taking all users & sta 1553 /* TX pending: taking all users & stable -> active */
1550 spin_lock(&tx->lock); 1554 spin_lock(&tx->lock);
1551 key = tx->key; 1555 key = tx->key;
1552 if (key.active && tipc_aead_users(tx- 1556 if (key.active && tipc_aead_users(tx->aead[key.active]) > 0)
1553 goto s1; 1557 goto s1;
1554 if (!key.pending || tipc_aead_users(t 1558 if (!key.pending || tipc_aead_users(tx->aead[key.pending]) <= 0)
1555 goto s1; 1559 goto s1;
1556 if (time_before(jiffies, tx->timer1 + 1560 if (time_before(jiffies, tx->timer1 + TIPC_TX_LASTING_TIME))
1557 goto s1; 1561 goto s1;
1558 1562
1559 tipc_crypto_key_set_state(tx, key.pas 1563 tipc_crypto_key_set_state(tx, key.passive, key.pending, 0);
1560 if (key.active) 1564 if (key.active)
1561 tipc_crypto_key_detach(tx->ae 1565 tipc_crypto_key_detach(tx->aead[key.active], &tx->lock);
1562 this_cpu_inc(tx->stats->stat[STAT_SWI 1566 this_cpu_inc(tx->stats->stat[STAT_SWITCHES]);
1563 pr_info("%s: key[%d] is activated\n", 1567 pr_info("%s: key[%d] is activated\n", tx->name, key.pending);
1564 1568
1565 s1: 1569 s1:
1566 spin_unlock(&tx->lock); 1570 spin_unlock(&tx->lock);
1567 1571
1568 /* RX pending: having user -> active 1572 /* RX pending: having user -> active */
1569 spin_lock(&rx->lock); 1573 spin_lock(&rx->lock);
1570 key = rx->key; 1574 key = rx->key;
1571 if (!key.pending || tipc_aead_users(r 1575 if (!key.pending || tipc_aead_users(rx->aead[key.pending]) <= 0)
1572 goto s2; 1576 goto s2;
1573 1577
1574 if (key.active) 1578 if (key.active)
1575 key.passive = key.active; 1579 key.passive = key.active;
1576 key.active = key.pending; 1580 key.active = key.pending;
1577 rx->timer2 = jiffies; 1581 rx->timer2 = jiffies;
1578 tipc_crypto_key_set_state(rx, key.pas 1582 tipc_crypto_key_set_state(rx, key.passive, key.active, 0);
1579 this_cpu_inc(rx->stats->stat[STAT_SWI 1583 this_cpu_inc(rx->stats->stat[STAT_SWITCHES]);
1580 pr_info("%s: key[%d] is activated\n", 1584 pr_info("%s: key[%d] is activated\n", rx->name, key.pending);
1581 goto s5; 1585 goto s5;
1582 1586
1583 s2: 1587 s2:
1584 /* RX pending: not working -> remove 1588 /* RX pending: not working -> remove */
1585 if (!key.pending || tipc_aead_users(r 1589 if (!key.pending || tipc_aead_users(rx->aead[key.pending]) > -10)
1586 goto s3; 1590 goto s3;
1587 1591
1588 tipc_crypto_key_set_state(rx, key.pas 1592 tipc_crypto_key_set_state(rx, key.passive, key.active, 0);
1589 tipc_crypto_key_detach(rx->aead[key.p 1593 tipc_crypto_key_detach(rx->aead[key.pending], &rx->lock);
1590 pr_debug("%s: key[%d] is removed\n", 1594 pr_debug("%s: key[%d] is removed\n", rx->name, key.pending);
1591 goto s5; 1595 goto s5;
1592 1596
1593 s3: 1597 s3:
1594 /* RX active: timed out or no user -> 1598 /* RX active: timed out or no user -> pending */
1595 if (!key.active) 1599 if (!key.active)
1596 goto s4; 1600 goto s4;
1597 if (time_before(jiffies, rx->timer1 + 1601 if (time_before(jiffies, rx->timer1 + TIPC_RX_ACTIVE_LIM) &&
1598 tipc_aead_users(rx->aead[key.acti 1602 tipc_aead_users(rx->aead[key.active]) > 0)
1599 goto s4; 1603 goto s4;
1600 1604
1601 if (key.pending) 1605 if (key.pending)
1602 key.passive = key.active; 1606 key.passive = key.active;
1603 else 1607 else
1604 key.pending = key.active; 1608 key.pending = key.active;
1605 rx->timer2 = jiffies; 1609 rx->timer2 = jiffies;
1606 tipc_crypto_key_set_state(rx, key.pas 1610 tipc_crypto_key_set_state(rx, key.passive, 0, key.pending);
1607 tipc_aead_users_set(rx->aead[key.pend 1611 tipc_aead_users_set(rx->aead[key.pending], 0);
1608 pr_debug("%s: key[%d] is deactivated\ 1612 pr_debug("%s: key[%d] is deactivated\n", rx->name, key.active);
1609 goto s5; 1613 goto s5;
1610 1614
1611 s4: 1615 s4:
1612 /* RX passive: outdated or not workin 1616 /* RX passive: outdated or not working -> free */
1613 if (!key.passive) 1617 if (!key.passive)
1614 goto s5; 1618 goto s5;
1615 if (time_before(jiffies, rx->timer2 + 1619 if (time_before(jiffies, rx->timer2 + TIPC_RX_PASSIVE_LIM) &&
1616 tipc_aead_users(rx->aead[key.pass 1620 tipc_aead_users(rx->aead[key.passive]) > -10)
1617 goto s5; 1621 goto s5;
1618 1622
1619 tipc_crypto_key_set_state(rx, 0, key. 1623 tipc_crypto_key_set_state(rx, 0, key.active, key.pending);
1620 tipc_crypto_key_detach(rx->aead[key.p 1624 tipc_crypto_key_detach(rx->aead[key.passive], &rx->lock);
1621 pr_debug("%s: key[%d] is freed\n", rx 1625 pr_debug("%s: key[%d] is freed\n", rx->name, key.passive);
1622 1626
1623 s5: 1627 s5:
1624 spin_unlock(&rx->lock); 1628 spin_unlock(&rx->lock);
1625 1629
1626 /* Relax it here, the flag will be se 1630 /* Relax it here, the flag will be set again if it really is, but only
1627 * when we are not in grace period fo 1631 * when we are not in grace period for safety!
1628 */ 1632 */
1629 if (time_after(jiffies, tx->timer2 + 1633 if (time_after(jiffies, tx->timer2 + TIPC_TX_GRACE_PERIOD))
1630 tx->legacy_user = 0; 1634 tx->legacy_user = 0;
1631 1635
1632 /* Limit max_tfms & do debug commands 1636 /* Limit max_tfms & do debug commands if needed */
1633 if (likely(sysctl_tipc_max_tfms <= TI 1637 if (likely(sysctl_tipc_max_tfms <= TIPC_MAX_TFMS_LIM))
1634 return; 1638 return;
1635 1639
1636 cmd = sysctl_tipc_max_tfms; 1640 cmd = sysctl_tipc_max_tfms;
1637 sysctl_tipc_max_tfms = TIPC_MAX_TFMS_ 1641 sysctl_tipc_max_tfms = TIPC_MAX_TFMS_DEF;
1638 tipc_crypto_do_cmd(rx->net, cmd); 1642 tipc_crypto_do_cmd(rx->net, cmd);
1639 } 1643 }
1640 1644
1641 static inline void tipc_crypto_clone_msg(stru 1645 static inline void tipc_crypto_clone_msg(struct net *net, struct sk_buff *_skb,
1642 stru 1646 struct tipc_bearer *b,
1643 stru 1647 struct tipc_media_addr *dst,
1644 stru 1648 struct tipc_node *__dnode, u8 type)
1645 { 1649 {
1646 struct sk_buff *skb; 1650 struct sk_buff *skb;
1647 1651
1648 skb = skb_clone(_skb, GFP_ATOMIC); 1652 skb = skb_clone(_skb, GFP_ATOMIC);
1649 if (skb) { 1653 if (skb) {
1650 TIPC_SKB_CB(skb)->xmit_type = 1654 TIPC_SKB_CB(skb)->xmit_type = type;
1651 tipc_crypto_xmit(net, &skb, b 1655 tipc_crypto_xmit(net, &skb, b, dst, __dnode);
1652 if (skb) 1656 if (skb)
1653 b->media->send_msg(ne 1657 b->media->send_msg(net, skb, b, dst);
1654 } 1658 }
1655 } 1659 }
1656 1660
1657 /** 1661 /**
1658 * tipc_crypto_xmit - Build & encrypt TIPC me 1662 * tipc_crypto_xmit - Build & encrypt TIPC message for xmit
1659 * @net: struct net 1663 * @net: struct net
1660 * @skb: input/output message skb pointer 1664 * @skb: input/output message skb pointer
1661 * @b: bearer used for xmit later 1665 * @b: bearer used for xmit later
1662 * @dst: destination media address 1666 * @dst: destination media address
1663 * @__dnode: destination node for reference i 1667 * @__dnode: destination node for reference if any
1664 * 1668 *
1665 * First, build an encryption message header 1669 * First, build an encryption message header on the top of the message, then
1666 * encrypt the original TIPC message by using 1670 * encrypt the original TIPC message by using the pending, master or active
1667 * key with this preference order. 1671 * key with this preference order.
1668 * If the encryption is successful, the encry 1672 * If the encryption is successful, the encrypted skb is returned directly or
1669 * via the callback. 1673 * via the callback.
1670 * Otherwise, the skb is freed! 1674 * Otherwise, the skb is freed!
1671 * 1675 *
1672 * Return: 1676 * Return:
1673 * * 0 : the encryption has !! 1677 * 0 : the encryption has succeeded (or no encryption)
1674 * * -EINPROGRESS/-EBUSY : the encryption is !! 1678 * -EINPROGRESS/-EBUSY : the encryption is ongoing, a callback will be made
1675 * * -ENOKEK : the encryption has !! 1679 * -ENOKEK : the encryption has failed due to no key
1676 * * -EKEYREVOKED : the encryption has !! 1680 * -EKEYREVOKED : the encryption has failed due to key revoked
1677 * * -ENOMEM : the encryption has !! 1681 * -ENOMEM : the encryption has failed due to no memory
1678 * * < 0 : the encryption has !! 1682 * < 0 : the encryption has failed due to other reasons
1679 */ 1683 */
1680 int tipc_crypto_xmit(struct net *net, struct 1684 int tipc_crypto_xmit(struct net *net, struct sk_buff **skb,
1681 struct tipc_bearer *b, s 1685 struct tipc_bearer *b, struct tipc_media_addr *dst,
1682 struct tipc_node *__dnod 1686 struct tipc_node *__dnode)
1683 { 1687 {
1684 struct tipc_crypto *__rx = tipc_node_ 1688 struct tipc_crypto *__rx = tipc_node_crypto_rx(__dnode);
1685 struct tipc_crypto *tx = tipc_net(net 1689 struct tipc_crypto *tx = tipc_net(net)->crypto_tx;
1686 struct tipc_crypto_stats __percpu *st 1690 struct tipc_crypto_stats __percpu *stats = tx->stats;
1687 struct tipc_msg *hdr = buf_msg(*skb); 1691 struct tipc_msg *hdr = buf_msg(*skb);
1688 struct tipc_key key = tx->key; 1692 struct tipc_key key = tx->key;
1689 struct tipc_aead *aead = NULL; 1693 struct tipc_aead *aead = NULL;
1690 u32 user = msg_user(hdr); 1694 u32 user = msg_user(hdr);
1691 u32 type = msg_type(hdr); 1695 u32 type = msg_type(hdr);
1692 int rc = -ENOKEY; 1696 int rc = -ENOKEY;
1693 u8 tx_key = 0; 1697 u8 tx_key = 0;
1694 1698
1695 /* No encryption? */ 1699 /* No encryption? */
1696 if (!tx->working) 1700 if (!tx->working)
1697 return 0; 1701 return 0;
1698 1702
1699 /* Pending key if peer has active on 1703 /* Pending key if peer has active on it or probing time */
1700 if (unlikely(key.pending)) { 1704 if (unlikely(key.pending)) {
1701 tx_key = key.pending; 1705 tx_key = key.pending;
1702 if (!tx->key_master && !key.a 1706 if (!tx->key_master && !key.active)
1703 goto encrypt; 1707 goto encrypt;
1704 if (__rx && atomic_read(&__rx 1708 if (__rx && atomic_read(&__rx->peer_rx_active) == tx_key)
1705 goto encrypt; 1709 goto encrypt;
1706 if (TIPC_SKB_CB(*skb)->xmit_t 1710 if (TIPC_SKB_CB(*skb)->xmit_type == SKB_PROBING) {
1707 pr_debug("%s: probing 1711 pr_debug("%s: probing for key[%d]\n", tx->name,
1708 key.pending) 1712 key.pending);
1709 goto encrypt; 1713 goto encrypt;
1710 } 1714 }
1711 if (user == LINK_CONFIG || us 1715 if (user == LINK_CONFIG || user == LINK_PROTOCOL)
1712 tipc_crypto_clone_msg 1716 tipc_crypto_clone_msg(net, *skb, b, dst, __dnode,
1713 1717 SKB_PROBING);
1714 } 1718 }
1715 1719
1716 /* Master key if this is a *vital* me 1720 /* Master key if this is a *vital* message or in grace period */
1717 if (tx->key_master) { 1721 if (tx->key_master) {
1718 tx_key = KEY_MASTER; 1722 tx_key = KEY_MASTER;
1719 if (!key.active) 1723 if (!key.active)
1720 goto encrypt; 1724 goto encrypt;
1721 if (TIPC_SKB_CB(*skb)->xmit_t 1725 if (TIPC_SKB_CB(*skb)->xmit_type == SKB_GRACING) {
1722 pr_debug("%s: gracing 1726 pr_debug("%s: gracing for msg (%d %d)\n", tx->name,
1723 user, type); 1727 user, type);
1724 goto encrypt; 1728 goto encrypt;
1725 } 1729 }
1726 if (user == LINK_CONFIG || 1730 if (user == LINK_CONFIG ||
1727 (user == LINK_PROTOCOL && 1731 (user == LINK_PROTOCOL && type == RESET_MSG) ||
1728 (user == MSG_CRYPTO && ty 1732 (user == MSG_CRYPTO && type == KEY_DISTR_MSG) ||
1729 time_before(jiffies, tx-> 1733 time_before(jiffies, tx->timer2 + TIPC_TX_GRACE_PERIOD)) {
1730 if (__rx && __rx->key 1734 if (__rx && __rx->key_master &&
1731 !atomic_read(&__r 1735 !atomic_read(&__rx->peer_rx_active))
1732 goto encrypt; 1736 goto encrypt;
1733 if (!__rx) { 1737 if (!__rx) {
1734 if (likely(!t 1738 if (likely(!tx->legacy_user))
1735 goto 1739 goto encrypt;
1736 tipc_crypto_c 1740 tipc_crypto_clone_msg(net, *skb, b, dst,
1737 1741 __dnode, SKB_GRACING);
1738 } 1742 }
1739 } 1743 }
1740 } 1744 }
1741 1745
1742 /* Else, use the active key if any */ 1746 /* Else, use the active key if any */
1743 if (likely(key.active)) { 1747 if (likely(key.active)) {
1744 tx_key = key.active; 1748 tx_key = key.active;
1745 goto encrypt; 1749 goto encrypt;
1746 } 1750 }
1747 1751
1748 goto exit; 1752 goto exit;
1749 1753
1750 encrypt: 1754 encrypt:
1751 aead = tipc_aead_get(tx->aead[tx_key] 1755 aead = tipc_aead_get(tx->aead[tx_key]);
1752 if (unlikely(!aead)) 1756 if (unlikely(!aead))
1753 goto exit; 1757 goto exit;
1754 rc = tipc_ehdr_build(net, aead, tx_ke 1758 rc = tipc_ehdr_build(net, aead, tx_key, *skb, __rx);
1755 if (likely(rc > 0)) 1759 if (likely(rc > 0))
1756 rc = tipc_aead_encrypt(aead, 1760 rc = tipc_aead_encrypt(aead, *skb, b, dst, __dnode);
1757 1761
1758 exit: 1762 exit:
1759 switch (rc) { 1763 switch (rc) {
1760 case 0: 1764 case 0:
1761 this_cpu_inc(stats->stat[STAT 1765 this_cpu_inc(stats->stat[STAT_OK]);
1762 break; 1766 break;
1763 case -EINPROGRESS: 1767 case -EINPROGRESS:
1764 case -EBUSY: 1768 case -EBUSY:
1765 this_cpu_inc(stats->stat[STAT 1769 this_cpu_inc(stats->stat[STAT_ASYNC]);
1766 *skb = NULL; 1770 *skb = NULL;
1767 return rc; 1771 return rc;
1768 default: 1772 default:
1769 this_cpu_inc(stats->stat[STAT 1773 this_cpu_inc(stats->stat[STAT_NOK]);
1770 if (rc == -ENOKEY) 1774 if (rc == -ENOKEY)
1771 this_cpu_inc(stats->s 1775 this_cpu_inc(stats->stat[STAT_NOKEYS]);
1772 else if (rc == -EKEYREVOKED) 1776 else if (rc == -EKEYREVOKED)
1773 this_cpu_inc(stats->s 1777 this_cpu_inc(stats->stat[STAT_BADKEYS]);
1774 kfree_skb(*skb); 1778 kfree_skb(*skb);
1775 *skb = NULL; 1779 *skb = NULL;
1776 break; 1780 break;
1777 } 1781 }
1778 1782
1779 tipc_aead_put(aead); 1783 tipc_aead_put(aead);
1780 return rc; 1784 return rc;
1781 } 1785 }
1782 1786
1783 /** 1787 /**
1784 * tipc_crypto_rcv - Decrypt an encrypted TIP 1788 * tipc_crypto_rcv - Decrypt an encrypted TIPC message from peer
1785 * @net: struct net 1789 * @net: struct net
1786 * @rx: RX crypto handle 1790 * @rx: RX crypto handle
1787 * @skb: input/output message skb pointer 1791 * @skb: input/output message skb pointer
1788 * @b: bearer where the message has been rece 1792 * @b: bearer where the message has been received
1789 * 1793 *
1790 * If the decryption is successful, the decry 1794 * If the decryption is successful, the decrypted skb is returned directly or
1791 * as the callback, the encryption header and 1795 * as the callback, the encryption header and auth tag will be trimed out
1792 * before forwarding to tipc_rcv() via the ti 1796 * before forwarding to tipc_rcv() via the tipc_crypto_rcv_complete().
1793 * Otherwise, the skb will be freed! 1797 * Otherwise, the skb will be freed!
1794 * Note: RX key(s) can be re-aligned, or in c 1798 * Note: RX key(s) can be re-aligned, or in case of no key suitable, TX
1795 * cluster key(s) can be taken for decryption 1799 * cluster key(s) can be taken for decryption (- recursive).
1796 * 1800 *
1797 * Return: 1801 * Return:
1798 * * 0 : the decryption has !! 1802 * 0 : the decryption has successfully completed
1799 * * -EINPROGRESS/-EBUSY : the decryption is !! 1803 * -EINPROGRESS/-EBUSY : the decryption is ongoing, a callback will be made
1800 * * -ENOKEY : the decryption has !! 1804 * -ENOKEY : the decryption has failed due to no key
1801 * * -EBADMSG : the decryption has !! 1805 * -EBADMSG : the decryption has failed due to bad message
1802 * * -ENOMEM : the decryption has !! 1806 * -ENOMEM : the decryption has failed due to no memory
1803 * * < 0 : the decryption has !! 1807 * < 0 : the decryption has failed due to other reasons
1804 */ 1808 */
1805 int tipc_crypto_rcv(struct net *net, struct t 1809 int tipc_crypto_rcv(struct net *net, struct tipc_crypto *rx,
1806 struct sk_buff **skb, str 1810 struct sk_buff **skb, struct tipc_bearer *b)
1807 { 1811 {
1808 struct tipc_crypto *tx = tipc_net(net 1812 struct tipc_crypto *tx = tipc_net(net)->crypto_tx;
1809 struct tipc_crypto_stats __percpu *st 1813 struct tipc_crypto_stats __percpu *stats;
1810 struct tipc_aead *aead = NULL; 1814 struct tipc_aead *aead = NULL;
1811 struct tipc_key key; 1815 struct tipc_key key;
1812 int rc = -ENOKEY; 1816 int rc = -ENOKEY;
1813 u8 tx_key, n; 1817 u8 tx_key, n;
1814 1818
1815 tx_key = ((struct tipc_ehdr *)(*skb)- 1819 tx_key = ((struct tipc_ehdr *)(*skb)->data)->tx_key;
1816 1820
1817 /* New peer? 1821 /* New peer?
1818 * Let's try with TX key (i.e. cluste 1822 * Let's try with TX key (i.e. cluster mode) & verify the skb first!
1819 */ 1823 */
1820 if (unlikely(!rx || tx_key == KEY_MAS 1824 if (unlikely(!rx || tx_key == KEY_MASTER))
1821 goto pick_tx; 1825 goto pick_tx;
1822 1826
1823 /* Pick RX key according to TX key if 1827 /* Pick RX key according to TX key if any */
1824 key = rx->key; 1828 key = rx->key;
1825 if (tx_key == key.active || tx_key == 1829 if (tx_key == key.active || tx_key == key.pending ||
1826 tx_key == key.passive) 1830 tx_key == key.passive)
1827 goto decrypt; 1831 goto decrypt;
1828 1832
1829 /* Unknown key, let's try to align RX 1833 /* Unknown key, let's try to align RX key(s) */
1830 if (tipc_crypto_key_try_align(rx, tx_ 1834 if (tipc_crypto_key_try_align(rx, tx_key))
1831 goto decrypt; 1835 goto decrypt;
1832 1836
1833 pick_tx: 1837 pick_tx:
1834 /* No key suitable? Try to pick one f 1838 /* No key suitable? Try to pick one from TX... */
1835 aead = tipc_crypto_key_pick_tx(tx, rx 1839 aead = tipc_crypto_key_pick_tx(tx, rx, *skb, tx_key);
1836 if (aead) 1840 if (aead)
1837 goto decrypt; 1841 goto decrypt;
1838 goto exit; 1842 goto exit;
1839 1843
1840 decrypt: 1844 decrypt:
1841 rcu_read_lock(); 1845 rcu_read_lock();
1842 if (!aead) 1846 if (!aead)
1843 aead = tipc_aead_get(rx->aead 1847 aead = tipc_aead_get(rx->aead[tx_key]);
1844 rc = tipc_aead_decrypt(net, aead, *sk 1848 rc = tipc_aead_decrypt(net, aead, *skb, b);
1845 rcu_read_unlock(); 1849 rcu_read_unlock();
1846 1850
1847 exit: 1851 exit:
1848 stats = ((rx) ?: tx)->stats; 1852 stats = ((rx) ?: tx)->stats;
1849 switch (rc) { 1853 switch (rc) {
1850 case 0: 1854 case 0:
1851 this_cpu_inc(stats->stat[STAT 1855 this_cpu_inc(stats->stat[STAT_OK]);
1852 break; 1856 break;
1853 case -EINPROGRESS: 1857 case -EINPROGRESS:
1854 case -EBUSY: 1858 case -EBUSY:
1855 this_cpu_inc(stats->stat[STAT 1859 this_cpu_inc(stats->stat[STAT_ASYNC]);
1856 *skb = NULL; 1860 *skb = NULL;
1857 return rc; 1861 return rc;
1858 default: 1862 default:
1859 this_cpu_inc(stats->stat[STAT 1863 this_cpu_inc(stats->stat[STAT_NOK]);
1860 if (rc == -ENOKEY) { 1864 if (rc == -ENOKEY) {
1861 kfree_skb(*skb); 1865 kfree_skb(*skb);
1862 *skb = NULL; 1866 *skb = NULL;
1863 if (rx) { 1867 if (rx) {
1864 /* Mark rx->n 1868 /* Mark rx->nokey only if we dont have a
1865 * pending re 1869 * pending received session key, nor a newer
1866 * one i.e. i 1870 * one i.e. in the next slot.
1867 */ 1871 */
1868 n = key_next( 1872 n = key_next(tx_key);
1869 rx->nokey = ! 1873 rx->nokey = !(rx->skey ||
1870 1874 rcu_access_pointer(rx->aead[n]));
1871 pr_debug_rate 1875 pr_debug_ratelimited("%s: nokey %d, key %d/%x\n",
1872 1876 rx->name, rx->nokey,
1873 1877 tx_key, rx->key.keys);
1874 tipc_node_put 1878 tipc_node_put(rx->node);
1875 } 1879 }
1876 this_cpu_inc(stats->s 1880 this_cpu_inc(stats->stat[STAT_NOKEYS]);
1877 return rc; 1881 return rc;
1878 } else if (rc == -EBADMSG) { 1882 } else if (rc == -EBADMSG) {
1879 this_cpu_inc(stats->s 1883 this_cpu_inc(stats->stat[STAT_BADMSGS]);
1880 } 1884 }
1881 break; 1885 break;
1882 } 1886 }
1883 1887
1884 tipc_crypto_rcv_complete(net, aead, b 1888 tipc_crypto_rcv_complete(net, aead, b, skb, rc);
1885 return rc; 1889 return rc;
1886 } 1890 }
1887 1891
1888 static void tipc_crypto_rcv_complete(struct n 1892 static void tipc_crypto_rcv_complete(struct net *net, struct tipc_aead *aead,
1889 struct t 1893 struct tipc_bearer *b,
1890 struct s 1894 struct sk_buff **skb, int err)
1891 { 1895 {
1892 struct tipc_skb_cb *skb_cb = TIPC_SKB 1896 struct tipc_skb_cb *skb_cb = TIPC_SKB_CB(*skb);
1893 struct tipc_crypto *rx = aead->crypto 1897 struct tipc_crypto *rx = aead->crypto;
1894 struct tipc_aead *tmp = NULL; 1898 struct tipc_aead *tmp = NULL;
1895 struct tipc_ehdr *ehdr; 1899 struct tipc_ehdr *ehdr;
1896 struct tipc_node *n; 1900 struct tipc_node *n;
1897 1901
1898 /* Is this completed by TX? */ 1902 /* Is this completed by TX? */
1899 if (unlikely(is_tx(aead->crypto))) { 1903 if (unlikely(is_tx(aead->crypto))) {
1900 rx = skb_cb->tx_clone_ctx.rx; 1904 rx = skb_cb->tx_clone_ctx.rx;
1901 pr_debug("TX->RX(%s): err %d, 1905 pr_debug("TX->RX(%s): err %d, aead %p, skb->next %p, flags %x\n",
1902 (rx) ? tipc_node_get 1906 (rx) ? tipc_node_get_id_str(rx->node) : "-", err, aead,
1903 (*skb)->next, skb_cb 1907 (*skb)->next, skb_cb->flags);
1904 pr_debug("skb_cb [recurs %d, 1908 pr_debug("skb_cb [recurs %d, last %p], tx->aead [%p %p %p]\n",
1905 skb_cb->tx_clone_ctx 1909 skb_cb->tx_clone_ctx.recurs, skb_cb->tx_clone_ctx.last,
1906 aead->crypto->aead[1 1910 aead->crypto->aead[1], aead->crypto->aead[2],
1907 aead->crypto->aead[3 1911 aead->crypto->aead[3]);
1908 if (unlikely(err)) { 1912 if (unlikely(err)) {
1909 if (err == -EBADMSG & 1913 if (err == -EBADMSG && (*skb)->next)
1910 tipc_rcv(net, 1914 tipc_rcv(net, (*skb)->next, b);
1911 goto free_skb; 1915 goto free_skb;
1912 } 1916 }
1913 1917
1914 if (likely((*skb)->next)) { 1918 if (likely((*skb)->next)) {
1915 kfree_skb((*skb)->nex 1919 kfree_skb((*skb)->next);
1916 (*skb)->next = NULL; 1920 (*skb)->next = NULL;
1917 } 1921 }
1918 ehdr = (struct tipc_ehdr *)(* 1922 ehdr = (struct tipc_ehdr *)(*skb)->data;
1919 if (!rx) { 1923 if (!rx) {
1920 WARN_ON(ehdr->user != 1924 WARN_ON(ehdr->user != LINK_CONFIG);
1921 n = tipc_node_create( 1925 n = tipc_node_create(net, 0, ehdr->id, 0xffffu, 0,
1922 1926 true);
1923 rx = tipc_node_crypto 1927 rx = tipc_node_crypto_rx(n);
1924 if (unlikely(!rx)) 1928 if (unlikely(!rx))
1925 goto free_skb 1929 goto free_skb;
1926 } 1930 }
1927 1931
1928 /* Ignore cloning if it was T 1932 /* Ignore cloning if it was TX master key */
1929 if (ehdr->tx_key == KEY_MASTE 1933 if (ehdr->tx_key == KEY_MASTER)
1930 goto rcv; 1934 goto rcv;
1931 if (tipc_aead_clone(&tmp, aea 1935 if (tipc_aead_clone(&tmp, aead) < 0)
1932 goto rcv; 1936 goto rcv;
1933 WARN_ON(!refcount_inc_not_zer 1937 WARN_ON(!refcount_inc_not_zero(&tmp->refcnt));
1934 if (tipc_crypto_key_attach(rx 1938 if (tipc_crypto_key_attach(rx, tmp, ehdr->tx_key, false) < 0) {
1935 tipc_aead_free(&tmp-> 1939 tipc_aead_free(&tmp->rcu);
1936 goto rcv; 1940 goto rcv;
1937 } 1941 }
1938 tipc_aead_put(aead); 1942 tipc_aead_put(aead);
1939 aead = tmp; 1943 aead = tmp;
1940 } 1944 }
1941 1945
1942 if (unlikely(err)) { 1946 if (unlikely(err)) {
1943 tipc_aead_users_dec((struct t !! 1947 tipc_aead_users_dec(aead, INT_MIN);
1944 goto free_skb; 1948 goto free_skb;
1945 } 1949 }
1946 1950
1947 /* Set the RX key's user */ 1951 /* Set the RX key's user */
1948 tipc_aead_users_set((struct tipc_aead !! 1952 tipc_aead_users_set(aead, 1);
1949 1953
1950 /* Mark this point, RX works */ 1954 /* Mark this point, RX works */
1951 rx->timer1 = jiffies; 1955 rx->timer1 = jiffies;
1952 1956
1953 rcv: 1957 rcv:
1954 /* Remove ehdr & auth. tag prior to t 1958 /* Remove ehdr & auth. tag prior to tipc_rcv() */
1955 ehdr = (struct tipc_ehdr *)(*skb)->da 1959 ehdr = (struct tipc_ehdr *)(*skb)->data;
1956 1960
1957 /* Mark this point, RX passive still 1961 /* Mark this point, RX passive still works */
1958 if (rx->key.passive && ehdr->tx_key = 1962 if (rx->key.passive && ehdr->tx_key == rx->key.passive)
1959 rx->timer2 = jiffies; 1963 rx->timer2 = jiffies;
1960 1964
1961 skb_reset_network_header(*skb); 1965 skb_reset_network_header(*skb);
1962 skb_pull(*skb, tipc_ehdr_size(ehdr)); 1966 skb_pull(*skb, tipc_ehdr_size(ehdr));
1963 if (pskb_trim(*skb, (*skb)->len - aea 1967 if (pskb_trim(*skb, (*skb)->len - aead->authsize))
1964 goto free_skb; 1968 goto free_skb;
1965 1969
1966 /* Validate TIPCv2 message */ 1970 /* Validate TIPCv2 message */
1967 if (unlikely(!tipc_msg_validate(skb)) 1971 if (unlikely(!tipc_msg_validate(skb))) {
1968 pr_err_ratelimited("Packet dr 1972 pr_err_ratelimited("Packet dropped after decryption!\n");
1969 goto free_skb; 1973 goto free_skb;
1970 } 1974 }
1971 1975
1972 /* Ok, everything's fine, try to sync 1976 /* Ok, everything's fine, try to synch own keys according to peers' */
1973 tipc_crypto_key_synch(rx, *skb); 1977 tipc_crypto_key_synch(rx, *skb);
1974 1978
1975 /* Re-fetch skb cb as skb might be ch 1979 /* Re-fetch skb cb as skb might be changed in tipc_msg_validate */
1976 skb_cb = TIPC_SKB_CB(*skb); 1980 skb_cb = TIPC_SKB_CB(*skb);
1977 1981
1978 /* Mark skb decrypted */ 1982 /* Mark skb decrypted */
1979 skb_cb->decrypted = 1; 1983 skb_cb->decrypted = 1;
1980 1984
1981 /* Clear clone cxt if any */ 1985 /* Clear clone cxt if any */
1982 if (likely(!skb_cb->tx_clone_deferred 1986 if (likely(!skb_cb->tx_clone_deferred))
1983 goto exit; 1987 goto exit;
1984 skb_cb->tx_clone_deferred = 0; 1988 skb_cb->tx_clone_deferred = 0;
1985 memset(&skb_cb->tx_clone_ctx, 0, size 1989 memset(&skb_cb->tx_clone_ctx, 0, sizeof(skb_cb->tx_clone_ctx));
1986 goto exit; 1990 goto exit;
1987 1991
1988 free_skb: 1992 free_skb:
1989 kfree_skb(*skb); 1993 kfree_skb(*skb);
1990 *skb = NULL; 1994 *skb = NULL;
1991 1995
1992 exit: 1996 exit:
1993 tipc_aead_put(aead); 1997 tipc_aead_put(aead);
1994 if (rx) 1998 if (rx)
1995 tipc_node_put(rx->node); 1999 tipc_node_put(rx->node);
1996 } 2000 }
1997 2001
1998 static void tipc_crypto_do_cmd(struct net *ne 2002 static void tipc_crypto_do_cmd(struct net *net, int cmd)
1999 { 2003 {
2000 struct tipc_net *tn = tipc_net(net); 2004 struct tipc_net *tn = tipc_net(net);
2001 struct tipc_crypto *tx = tn->crypto_t 2005 struct tipc_crypto *tx = tn->crypto_tx, *rx;
2002 struct list_head *p; 2006 struct list_head *p;
2003 unsigned int stat; 2007 unsigned int stat;
2004 int i, j, cpu; 2008 int i, j, cpu;
2005 char buf[200]; 2009 char buf[200];
2006 2010
2007 /* Currently only one command is supp 2011 /* Currently only one command is supported */
2008 switch (cmd) { 2012 switch (cmd) {
2009 case 0xfff1: 2013 case 0xfff1:
2010 goto print_stats; 2014 goto print_stats;
2011 default: 2015 default:
2012 return; 2016 return;
2013 } 2017 }
2014 2018
2015 print_stats: 2019 print_stats:
2016 /* Print a header */ 2020 /* Print a header */
2017 pr_info("\n=============== TIPC Crypt 2021 pr_info("\n=============== TIPC Crypto Statistics ===============\n\n");
2018 2022
2019 /* Print key status */ 2023 /* Print key status */
2020 pr_info("Key status:\n"); 2024 pr_info("Key status:\n");
2021 pr_info("TX(%7.7s)\n%s", tipc_own_id_ 2025 pr_info("TX(%7.7s)\n%s", tipc_own_id_string(net),
2022 tipc_crypto_key_dump(tx, buf) 2026 tipc_crypto_key_dump(tx, buf));
2023 2027
2024 rcu_read_lock(); 2028 rcu_read_lock();
2025 for (p = tn->node_list.next; p != &tn 2029 for (p = tn->node_list.next; p != &tn->node_list; p = p->next) {
2026 rx = tipc_node_crypto_rx_by_l 2030 rx = tipc_node_crypto_rx_by_list(p);
2027 pr_info("RX(%7.7s)\n%s", tipc 2031 pr_info("RX(%7.7s)\n%s", tipc_node_get_id_str(rx->node),
2028 tipc_crypto_key_dump( 2032 tipc_crypto_key_dump(rx, buf));
2029 } 2033 }
2030 rcu_read_unlock(); 2034 rcu_read_unlock();
2031 2035
2032 /* Print crypto statistics */ 2036 /* Print crypto statistics */
2033 for (i = 0, j = 0; i < MAX_STATS; i++ 2037 for (i = 0, j = 0; i < MAX_STATS; i++)
2034 j += scnprintf(buf + j, 200 - 2038 j += scnprintf(buf + j, 200 - j, "|%11s ", hstats[i]);
2035 pr_info("Counter %s", buf); 2039 pr_info("Counter %s", buf);
2036 2040
2037 memset(buf, '-', 115); 2041 memset(buf, '-', 115);
2038 buf[115] = '\0'; 2042 buf[115] = '\0';
2039 pr_info("%s\n", buf); 2043 pr_info("%s\n", buf);
2040 2044
2041 j = scnprintf(buf, 200, "TX(%7.7s) ", 2045 j = scnprintf(buf, 200, "TX(%7.7s) ", tipc_own_id_string(net));
2042 for_each_possible_cpu(cpu) { 2046 for_each_possible_cpu(cpu) {
2043 for (i = 0; i < MAX_STATS; i+ 2047 for (i = 0; i < MAX_STATS; i++) {
2044 stat = per_cpu_ptr(tx 2048 stat = per_cpu_ptr(tx->stats, cpu)->stat[i];
2045 j += scnprintf(buf + 2049 j += scnprintf(buf + j, 200 - j, "|%11d ", stat);
2046 } 2050 }
2047 pr_info("%s", buf); 2051 pr_info("%s", buf);
2048 j = scnprintf(buf, 200, "%12s 2052 j = scnprintf(buf, 200, "%12s", " ");
2049 } 2053 }
2050 2054
2051 rcu_read_lock(); 2055 rcu_read_lock();
2052 for (p = tn->node_list.next; p != &tn 2056 for (p = tn->node_list.next; p != &tn->node_list; p = p->next) {
2053 rx = tipc_node_crypto_rx_by_l 2057 rx = tipc_node_crypto_rx_by_list(p);
2054 j = scnprintf(buf, 200, "RX(% 2058 j = scnprintf(buf, 200, "RX(%7.7s) ",
2055 tipc_node_get_i 2059 tipc_node_get_id_str(rx->node));
2056 for_each_possible_cpu(cpu) { 2060 for_each_possible_cpu(cpu) {
2057 for (i = 0; i < MAX_S 2061 for (i = 0; i < MAX_STATS; i++) {
2058 stat = per_cp 2062 stat = per_cpu_ptr(rx->stats, cpu)->stat[i];
2059 j += scnprint 2063 j += scnprintf(buf + j, 200 - j, "|%11d ",
2060 2064 stat);
2061 } 2065 }
2062 pr_info("%s", buf); 2066 pr_info("%s", buf);
2063 j = scnprintf(buf, 20 2067 j = scnprintf(buf, 200, "%12s", " ");
2064 } 2068 }
2065 } 2069 }
2066 rcu_read_unlock(); 2070 rcu_read_unlock();
2067 2071
2068 pr_info("\n======================== D 2072 pr_info("\n======================== Done ========================\n");
2069 } 2073 }
2070 2074
2071 static char *tipc_crypto_key_dump(struct tipc 2075 static char *tipc_crypto_key_dump(struct tipc_crypto *c, char *buf)
2072 { 2076 {
2073 struct tipc_key key = c->key; 2077 struct tipc_key key = c->key;
2074 struct tipc_aead *aead; 2078 struct tipc_aead *aead;
2075 int k, i = 0; 2079 int k, i = 0;
2076 char *s; 2080 char *s;
2077 2081
2078 for (k = KEY_MIN; k <= KEY_MAX; k++) 2082 for (k = KEY_MIN; k <= KEY_MAX; k++) {
2079 if (k == KEY_MASTER) { 2083 if (k == KEY_MASTER) {
2080 if (is_rx(c)) 2084 if (is_rx(c))
2081 continue; 2085 continue;
2082 if (time_before(jiffi 2086 if (time_before(jiffies,
2083 c->ti 2087 c->timer2 + TIPC_TX_GRACE_PERIOD))
2084 s = "ACT"; 2088 s = "ACT";
2085 else 2089 else
2086 s = "PAS"; 2090 s = "PAS";
2087 } else { 2091 } else {
2088 if (k == key.passive) 2092 if (k == key.passive)
2089 s = "PAS"; 2093 s = "PAS";
2090 else if (k == key.act 2094 else if (k == key.active)
2091 s = "ACT"; 2095 s = "ACT";
2092 else if (k == key.pen 2096 else if (k == key.pending)
2093 s = "PEN"; 2097 s = "PEN";
2094 else 2098 else
2095 s = "-"; 2099 s = "-";
2096 } 2100 }
2097 i += scnprintf(buf + i, 200 - 2101 i += scnprintf(buf + i, 200 - i, "\tKey%d: %s", k, s);
2098 2102
2099 rcu_read_lock(); 2103 rcu_read_lock();
2100 aead = rcu_dereference(c->aea 2104 aead = rcu_dereference(c->aead[k]);
2101 if (aead) 2105 if (aead)
2102 i += scnprintf(buf + 2106 i += scnprintf(buf + i, 200 - i,
2103 "{\"0x 2107 "{\"0x...%s\", \"%s\"}/%d:%d",
2104 aead-> 2108 aead->hint,
2105 (aead- 2109 (aead->mode == CLUSTER_KEY) ? "c" : "p",
2106 atomic 2110 atomic_read(&aead->users),
2107 refcou 2111 refcount_read(&aead->refcnt));
2108 rcu_read_unlock(); 2112 rcu_read_unlock();
2109 i += scnprintf(buf + i, 200 - 2113 i += scnprintf(buf + i, 200 - i, "\n");
2110 } 2114 }
2111 2115
2112 if (is_rx(c)) 2116 if (is_rx(c))
2113 i += scnprintf(buf + i, 200 - 2117 i += scnprintf(buf + i, 200 - i, "\tPeer RX active: %d\n",
2114 atomic_read(&c 2118 atomic_read(&c->peer_rx_active));
2115 2119
2116 return buf; 2120 return buf;
2117 } 2121 }
2118 2122
2119 static char *tipc_key_change_dump(struct tipc 2123 static char *tipc_key_change_dump(struct tipc_key old, struct tipc_key new,
2120 char *buf) 2124 char *buf)
2121 { 2125 {
2122 struct tipc_key *key = &old; 2126 struct tipc_key *key = &old;
2123 int k, i = 0; 2127 int k, i = 0;
2124 char *s; 2128 char *s;
2125 2129
2126 /* Output format: "[%s %s %s] -> [%s 2130 /* Output format: "[%s %s %s] -> [%s %s %s]", max len = 32 */
2127 again: 2131 again:
2128 i += scnprintf(buf + i, 32 - i, "["); 2132 i += scnprintf(buf + i, 32 - i, "[");
2129 for (k = KEY_1; k <= KEY_3; k++) { 2133 for (k = KEY_1; k <= KEY_3; k++) {
2130 if (k == key->passive) 2134 if (k == key->passive)
2131 s = "pas"; 2135 s = "pas";
2132 else if (k == key->active) 2136 else if (k == key->active)
2133 s = "act"; 2137 s = "act";
2134 else if (k == key->pending) 2138 else if (k == key->pending)
2135 s = "pen"; 2139 s = "pen";
2136 else 2140 else
2137 s = "-"; 2141 s = "-";
2138 i += scnprintf(buf + i, 32 - 2142 i += scnprintf(buf + i, 32 - i,
2139 (k != KEY_3) ? 2143 (k != KEY_3) ? "%s " : "%s", s);
2140 } 2144 }
2141 if (key != &new) { 2145 if (key != &new) {
2142 i += scnprintf(buf + i, 32 - 2146 i += scnprintf(buf + i, 32 - i, "] -> ");
2143 key = &new; 2147 key = &new;
2144 goto again; 2148 goto again;
2145 } 2149 }
2146 i += scnprintf(buf + i, 32 - i, "]"); 2150 i += scnprintf(buf + i, 32 - i, "]");
2147 return buf; 2151 return buf;
2148 } 2152 }
2149 2153
2150 /** 2154 /**
2151 * tipc_crypto_msg_rcv - Common 'MSG_CRYPTO' 2155 * tipc_crypto_msg_rcv - Common 'MSG_CRYPTO' processing point
2152 * @net: the struct net 2156 * @net: the struct net
2153 * @skb: the receiving message buffer 2157 * @skb: the receiving message buffer
2154 */ 2158 */
2155 void tipc_crypto_msg_rcv(struct net *net, str 2159 void tipc_crypto_msg_rcv(struct net *net, struct sk_buff *skb)
2156 { 2160 {
2157 struct tipc_crypto *rx; 2161 struct tipc_crypto *rx;
2158 struct tipc_msg *hdr; 2162 struct tipc_msg *hdr;
2159 2163
2160 if (unlikely(skb_linearize(skb))) 2164 if (unlikely(skb_linearize(skb)))
2161 goto exit; 2165 goto exit;
2162 2166
2163 hdr = buf_msg(skb); 2167 hdr = buf_msg(skb);
2164 rx = tipc_node_crypto_rx_by_addr(net, 2168 rx = tipc_node_crypto_rx_by_addr(net, msg_prevnode(hdr));
2165 if (unlikely(!rx)) 2169 if (unlikely(!rx))
2166 goto exit; 2170 goto exit;
2167 2171
2168 switch (msg_type(hdr)) { 2172 switch (msg_type(hdr)) {
2169 case KEY_DISTR_MSG: 2173 case KEY_DISTR_MSG:
2170 if (tipc_crypto_key_rcv(rx, h 2174 if (tipc_crypto_key_rcv(rx, hdr))
2171 goto exit; 2175 goto exit;
2172 break; 2176 break;
2173 default: 2177 default:
2174 break; 2178 break;
2175 } 2179 }
2176 2180
2177 tipc_node_put(rx->node); 2181 tipc_node_put(rx->node);
2178 2182
2179 exit: 2183 exit:
2180 kfree_skb(skb); 2184 kfree_skb(skb);
2181 } 2185 }
2182 2186
2183 /** 2187 /**
2184 * tipc_crypto_key_distr - Distribute a TX ke 2188 * tipc_crypto_key_distr - Distribute a TX key
2185 * @tx: the TX crypto 2189 * @tx: the TX crypto
2186 * @key: the key's index 2190 * @key: the key's index
2187 * @dest: the destination tipc node, = NULL i 2191 * @dest: the destination tipc node, = NULL if distributing to all nodes
2188 * 2192 *
2189 * Return: 0 in case of success, otherwise < 2193 * Return: 0 in case of success, otherwise < 0
2190 */ 2194 */
2191 int tipc_crypto_key_distr(struct tipc_crypto 2195 int tipc_crypto_key_distr(struct tipc_crypto *tx, u8 key,
2192 struct tipc_node *d 2196 struct tipc_node *dest)
2193 { 2197 {
2194 struct tipc_aead *aead; 2198 struct tipc_aead *aead;
2195 u32 dnode = tipc_node_get_addr(dest); 2199 u32 dnode = tipc_node_get_addr(dest);
2196 int rc = -ENOKEY; 2200 int rc = -ENOKEY;
2197 2201
2198 if (!sysctl_tipc_key_exchange_enabled 2202 if (!sysctl_tipc_key_exchange_enabled)
2199 return 0; 2203 return 0;
2200 2204
2201 if (key) { 2205 if (key) {
2202 rcu_read_lock(); 2206 rcu_read_lock();
2203 aead = tipc_aead_get(tx->aead 2207 aead = tipc_aead_get(tx->aead[key]);
2204 if (likely(aead)) { 2208 if (likely(aead)) {
2205 rc = tipc_crypto_key_ 2209 rc = tipc_crypto_key_xmit(tx->net, aead->key,
2206 2210 aead->gen, aead->mode,
2207 2211 dnode);
2208 tipc_aead_put(aead); 2212 tipc_aead_put(aead);
2209 } 2213 }
2210 rcu_read_unlock(); 2214 rcu_read_unlock();
2211 } 2215 }
2212 2216
2213 return rc; 2217 return rc;
2214 } 2218 }
2215 2219
2216 /** 2220 /**
2217 * tipc_crypto_key_xmit - Send a session key 2221 * tipc_crypto_key_xmit - Send a session key
2218 * @net: the struct net 2222 * @net: the struct net
2219 * @skey: the session key to be sent 2223 * @skey: the session key to be sent
2220 * @gen: the key's generation 2224 * @gen: the key's generation
2221 * @mode: the key's mode 2225 * @mode: the key's mode
2222 * @dnode: the destination node address, = 0 2226 * @dnode: the destination node address, = 0 if broadcasting to all nodes
2223 * 2227 *
2224 * The session key 'skey' is packed in a TIPC 2228 * The session key 'skey' is packed in a TIPC v2 'MSG_CRYPTO/KEY_DISTR_MSG'
2225 * as its data section, then xmit-ed through 2229 * as its data section, then xmit-ed through the uc/bc link.
2226 * 2230 *
2227 * Return: 0 in case of success, otherwise < 2231 * Return: 0 in case of success, otherwise < 0
2228 */ 2232 */
2229 static int tipc_crypto_key_xmit(struct net *n 2233 static int tipc_crypto_key_xmit(struct net *net, struct tipc_aead_key *skey,
2230 u16 gen, u8 m 2234 u16 gen, u8 mode, u32 dnode)
2231 { 2235 {
2232 struct sk_buff_head pkts; 2236 struct sk_buff_head pkts;
2233 struct tipc_msg *hdr; 2237 struct tipc_msg *hdr;
2234 struct sk_buff *skb; 2238 struct sk_buff *skb;
2235 u16 size, cong_link_cnt; 2239 u16 size, cong_link_cnt;
2236 u8 *data; 2240 u8 *data;
2237 int rc; 2241 int rc;
2238 2242
2239 size = tipc_aead_key_size(skey); 2243 size = tipc_aead_key_size(skey);
2240 skb = tipc_buf_acquire(INT_H_SIZE + s 2244 skb = tipc_buf_acquire(INT_H_SIZE + size, GFP_ATOMIC);
2241 if (!skb) 2245 if (!skb)
2242 return -ENOMEM; 2246 return -ENOMEM;
2243 2247
2244 hdr = buf_msg(skb); 2248 hdr = buf_msg(skb);
2245 tipc_msg_init(tipc_own_addr(net), hdr 2249 tipc_msg_init(tipc_own_addr(net), hdr, MSG_CRYPTO, KEY_DISTR_MSG,
2246 INT_H_SIZE, dnode); 2250 INT_H_SIZE, dnode);
2247 msg_set_size(hdr, INT_H_SIZE + size); 2251 msg_set_size(hdr, INT_H_SIZE + size);
2248 msg_set_key_gen(hdr, gen); 2252 msg_set_key_gen(hdr, gen);
2249 msg_set_key_mode(hdr, mode); 2253 msg_set_key_mode(hdr, mode);
2250 2254
2251 data = msg_data(hdr); 2255 data = msg_data(hdr);
2252 *((__be32 *)(data + TIPC_AEAD_ALG_NAM 2256 *((__be32 *)(data + TIPC_AEAD_ALG_NAME)) = htonl(skey->keylen);
2253 memcpy(data, skey->alg_name, TIPC_AEA 2257 memcpy(data, skey->alg_name, TIPC_AEAD_ALG_NAME);
2254 memcpy(data + TIPC_AEAD_ALG_NAME + si 2258 memcpy(data + TIPC_AEAD_ALG_NAME + sizeof(__be32), skey->key,
2255 skey->keylen); 2259 skey->keylen);
2256 2260
2257 __skb_queue_head_init(&pkts); 2261 __skb_queue_head_init(&pkts);
2258 __skb_queue_tail(&pkts, skb); 2262 __skb_queue_tail(&pkts, skb);
2259 if (dnode) 2263 if (dnode)
2260 rc = tipc_node_xmit(net, &pkt 2264 rc = tipc_node_xmit(net, &pkts, dnode, 0);
2261 else 2265 else
2262 rc = tipc_bcast_xmit(net, &pk 2266 rc = tipc_bcast_xmit(net, &pkts, &cong_link_cnt);
2263 2267
2264 return rc; 2268 return rc;
2265 } 2269 }
2266 2270
2267 /** 2271 /**
2268 * tipc_crypto_key_rcv - Receive a session ke 2272 * tipc_crypto_key_rcv - Receive a session key
2269 * @rx: the RX crypto 2273 * @rx: the RX crypto
2270 * @hdr: the TIPC v2 message incl. the receiv 2274 * @hdr: the TIPC v2 message incl. the receiving session key in its data
2271 * 2275 *
2272 * This function retrieves the session key in 2276 * This function retrieves the session key in the message from peer, then
2273 * schedules a RX work to attach the key to t 2277 * schedules a RX work to attach the key to the corresponding RX crypto.
2274 * 2278 *
2275 * Return: "true" if the key has been schedul 2279 * Return: "true" if the key has been scheduled for attaching, otherwise
2276 * "false". 2280 * "false".
2277 */ 2281 */
2278 static bool tipc_crypto_key_rcv(struct tipc_c 2282 static bool tipc_crypto_key_rcv(struct tipc_crypto *rx, struct tipc_msg *hdr)
2279 { 2283 {
2280 struct tipc_crypto *tx = tipc_net(rx- 2284 struct tipc_crypto *tx = tipc_net(rx->net)->crypto_tx;
2281 struct tipc_aead_key *skey = NULL; 2285 struct tipc_aead_key *skey = NULL;
2282 u16 key_gen = msg_key_gen(hdr); 2286 u16 key_gen = msg_key_gen(hdr);
2283 u32 size = msg_data_sz(hdr); 2287 u32 size = msg_data_sz(hdr);
2284 u8 *data = msg_data(hdr); 2288 u8 *data = msg_data(hdr);
2285 unsigned int keylen; 2289 unsigned int keylen;
2286 2290
2287 /* Verify whether the size can exist 2291 /* Verify whether the size can exist in the packet */
2288 if (unlikely(size < sizeof(struct tip 2292 if (unlikely(size < sizeof(struct tipc_aead_key) + TIPC_AEAD_KEYLEN_MIN)) {
2289 pr_debug("%s: message data si 2293 pr_debug("%s: message data size is too small\n", rx->name);
2290 goto exit; 2294 goto exit;
2291 } 2295 }
2292 2296
2293 keylen = ntohl(*((__be32 *)(data + TI 2297 keylen = ntohl(*((__be32 *)(data + TIPC_AEAD_ALG_NAME)));
2294 2298
2295 /* Verify the supplied size values */ 2299 /* Verify the supplied size values */
2296 if (unlikely(size != keylen + sizeof( 2300 if (unlikely(size != keylen + sizeof(struct tipc_aead_key) ||
2297 keylen > TIPC_AEAD_KEY_S 2301 keylen > TIPC_AEAD_KEY_SIZE_MAX)) {
2298 pr_debug("%s: invalid MSG_CRY 2302 pr_debug("%s: invalid MSG_CRYPTO key size\n", rx->name);
2299 goto exit; 2303 goto exit;
2300 } 2304 }
2301 2305
2302 spin_lock(&rx->lock); 2306 spin_lock(&rx->lock);
2303 if (unlikely(rx->skey || (key_gen == 2307 if (unlikely(rx->skey || (key_gen == rx->key_gen && rx->key.keys))) {
2304 pr_err("%s: key existed <%p>, 2308 pr_err("%s: key existed <%p>, gen %d vs %d\n", rx->name,
2305 rx->skey, key_gen, rx- 2309 rx->skey, key_gen, rx->key_gen);
2306 goto exit_unlock; 2310 goto exit_unlock;
2307 } 2311 }
2308 2312
2309 /* Allocate memory for the key */ 2313 /* Allocate memory for the key */
2310 skey = kmalloc(size, GFP_ATOMIC); 2314 skey = kmalloc(size, GFP_ATOMIC);
2311 if (unlikely(!skey)) { 2315 if (unlikely(!skey)) {
2312 pr_err("%s: unable to allocat 2316 pr_err("%s: unable to allocate memory for skey\n", rx->name);
2313 goto exit_unlock; 2317 goto exit_unlock;
2314 } 2318 }
2315 2319
2316 /* Copy key from msg data */ 2320 /* Copy key from msg data */
2317 skey->keylen = keylen; 2321 skey->keylen = keylen;
2318 memcpy(skey->alg_name, data, TIPC_AEA 2322 memcpy(skey->alg_name, data, TIPC_AEAD_ALG_NAME);
2319 memcpy(skey->key, data + TIPC_AEAD_AL 2323 memcpy(skey->key, data + TIPC_AEAD_ALG_NAME + sizeof(__be32),
2320 skey->keylen); 2324 skey->keylen);
2321 2325
2322 rx->key_gen = key_gen; 2326 rx->key_gen = key_gen;
2323 rx->skey_mode = msg_key_mode(hdr); 2327 rx->skey_mode = msg_key_mode(hdr);
2324 rx->skey = skey; 2328 rx->skey = skey;
2325 rx->nokey = 0; 2329 rx->nokey = 0;
2326 mb(); /* for nokey flag */ 2330 mb(); /* for nokey flag */
2327 2331
2328 exit_unlock: 2332 exit_unlock:
2329 spin_unlock(&rx->lock); 2333 spin_unlock(&rx->lock);
2330 2334
2331 exit: 2335 exit:
2332 /* Schedule the key attaching on this 2336 /* Schedule the key attaching on this crypto */
2333 if (likely(skey && queue_delayed_work 2337 if (likely(skey && queue_delayed_work(tx->wq, &rx->work, 0)))
2334 return true; 2338 return true;
2335 2339
2336 return false; 2340 return false;
2337 } 2341 }
2338 2342
2339 /** 2343 /**
2340 * tipc_crypto_work_rx - Scheduled RX works h 2344 * tipc_crypto_work_rx - Scheduled RX works handler
2341 * @work: the struct RX work 2345 * @work: the struct RX work
2342 * 2346 *
2343 * The function processes the previous schedu 2347 * The function processes the previous scheduled works i.e. distributing TX key
2344 * or attaching a received session key on RX 2348 * or attaching a received session key on RX crypto.
2345 */ 2349 */
2346 static void tipc_crypto_work_rx(struct work_s 2350 static void tipc_crypto_work_rx(struct work_struct *work)
2347 { 2351 {
2348 struct delayed_work *dwork = to_delay 2352 struct delayed_work *dwork = to_delayed_work(work);
2349 struct tipc_crypto *rx = container_of 2353 struct tipc_crypto *rx = container_of(dwork, struct tipc_crypto, work);
2350 struct tipc_crypto *tx = tipc_net(rx- 2354 struct tipc_crypto *tx = tipc_net(rx->net)->crypto_tx;
2351 unsigned long delay = msecs_to_jiffie 2355 unsigned long delay = msecs_to_jiffies(5000);
2352 bool resched = false; 2356 bool resched = false;
2353 u8 key; 2357 u8 key;
2354 int rc; 2358 int rc;
2355 2359
2356 /* Case 1: Distribute TX key to peer 2360 /* Case 1: Distribute TX key to peer if scheduled */
2357 if (atomic_cmpxchg(&rx->key_distr, 2361 if (atomic_cmpxchg(&rx->key_distr,
2358 KEY_DISTR_SCHED, 2362 KEY_DISTR_SCHED,
2359 KEY_DISTR_COMPL) = 2363 KEY_DISTR_COMPL) == KEY_DISTR_SCHED) {
2360 /* Always pick the newest one 2364 /* Always pick the newest one for distributing */
2361 key = tx->key.pending ?: tx-> 2365 key = tx->key.pending ?: tx->key.active;
2362 rc = tipc_crypto_key_distr(tx 2366 rc = tipc_crypto_key_distr(tx, key, rx->node);
2363 if (unlikely(rc)) 2367 if (unlikely(rc))
2364 pr_warn("%s: unable t 2368 pr_warn("%s: unable to distr key[%d] to %s, err %d\n",
2365 tx->name, key 2369 tx->name, key, tipc_node_get_id_str(rx->node),
2366 rc); 2370 rc);
2367 2371
2368 /* Sched for key_distr releas 2372 /* Sched for key_distr releasing */
2369 resched = true; 2373 resched = true;
2370 } else { 2374 } else {
2371 atomic_cmpxchg(&rx->key_distr 2375 atomic_cmpxchg(&rx->key_distr, KEY_DISTR_COMPL, 0);
2372 } 2376 }
2373 2377
2374 /* Case 2: Attach a pending received 2378 /* Case 2: Attach a pending received session key from peer if any */
2375 if (rx->skey) { 2379 if (rx->skey) {
2376 rc = tipc_crypto_key_init(rx, 2380 rc = tipc_crypto_key_init(rx, rx->skey, rx->skey_mode, false);
2377 if (unlikely(rc < 0)) 2381 if (unlikely(rc < 0))
2378 pr_warn("%s: unable t 2382 pr_warn("%s: unable to attach received skey, err %d\n",
2379 rx->name, rc) 2383 rx->name, rc);
2380 switch (rc) { 2384 switch (rc) {
2381 case -EBUSY: 2385 case -EBUSY:
2382 case -ENOMEM: 2386 case -ENOMEM:
2383 /* Resched the key at 2387 /* Resched the key attaching */
2384 resched = true; 2388 resched = true;
2385 break; 2389 break;
2386 default: 2390 default:
2387 synchronize_rcu(); 2391 synchronize_rcu();
2388 kfree(rx->skey); 2392 kfree(rx->skey);
2389 rx->skey = NULL; 2393 rx->skey = NULL;
2390 break; 2394 break;
2391 } 2395 }
2392 } 2396 }
2393 2397
2394 if (resched && queue_delayed_work(tx- 2398 if (resched && queue_delayed_work(tx->wq, &rx->work, delay))
2395 return; 2399 return;
2396 2400
2397 tipc_node_put(rx->node); 2401 tipc_node_put(rx->node);
2398 } 2402 }
2399 2403
2400 /** 2404 /**
2401 * tipc_crypto_rekeying_sched - (Re)schedule 2405 * tipc_crypto_rekeying_sched - (Re)schedule rekeying w/o new interval
2402 * @tx: TX crypto 2406 * @tx: TX crypto
2403 * @changed: if the rekeying needs to be resc 2407 * @changed: if the rekeying needs to be rescheduled with new interval
2404 * @new_intv: new rekeying interval (when "ch 2408 * @new_intv: new rekeying interval (when "changed" = true)
2405 */ 2409 */
2406 void tipc_crypto_rekeying_sched(struct tipc_c 2410 void tipc_crypto_rekeying_sched(struct tipc_crypto *tx, bool changed,
2407 u32 new_intv) 2411 u32 new_intv)
2408 { 2412 {
2409 unsigned long delay; 2413 unsigned long delay;
2410 bool now = false; 2414 bool now = false;
2411 2415
2412 if (changed) { 2416 if (changed) {
2413 if (new_intv == TIPC_REKEYING 2417 if (new_intv == TIPC_REKEYING_NOW)
2414 now = true; 2418 now = true;
2415 else 2419 else
2416 tx->rekeying_intv = n 2420 tx->rekeying_intv = new_intv;
2417 cancel_delayed_work_sync(&tx- 2421 cancel_delayed_work_sync(&tx->work);
2418 } 2422 }
2419 2423
2420 if (tx->rekeying_intv || now) { 2424 if (tx->rekeying_intv || now) {
2421 delay = (now) ? 0 : tx->rekey 2425 delay = (now) ? 0 : tx->rekeying_intv * 60 * 1000;
2422 queue_delayed_work(tx->wq, &t 2426 queue_delayed_work(tx->wq, &tx->work, msecs_to_jiffies(delay));
2423 } 2427 }
2424 } 2428 }
2425 2429
2426 /** 2430 /**
2427 * tipc_crypto_work_tx - Scheduled TX works h 2431 * tipc_crypto_work_tx - Scheduled TX works handler
2428 * @work: the struct TX work 2432 * @work: the struct TX work
2429 * 2433 *
2430 * The function processes the previous schedu 2434 * The function processes the previous scheduled work, i.e. key rekeying, by
2431 * generating a new session key based on curr 2435 * generating a new session key based on current one, then attaching it to the
2432 * TX crypto and finally distributing it to p 2436 * TX crypto and finally distributing it to peers. It also re-schedules the
2433 * rekeying if needed. 2437 * rekeying if needed.
2434 */ 2438 */
2435 static void tipc_crypto_work_tx(struct work_s 2439 static void tipc_crypto_work_tx(struct work_struct *work)
2436 { 2440 {
2437 struct delayed_work *dwork = to_delay 2441 struct delayed_work *dwork = to_delayed_work(work);
2438 struct tipc_crypto *tx = container_of 2442 struct tipc_crypto *tx = container_of(dwork, struct tipc_crypto, work);
2439 struct tipc_aead_key *skey = NULL; 2443 struct tipc_aead_key *skey = NULL;
2440 struct tipc_key key = tx->key; 2444 struct tipc_key key = tx->key;
2441 struct tipc_aead *aead; 2445 struct tipc_aead *aead;
2442 int rc = -ENOMEM; 2446 int rc = -ENOMEM;
2443 2447
2444 if (unlikely(key.pending)) 2448 if (unlikely(key.pending))
2445 goto resched; 2449 goto resched;
2446 2450
2447 /* Take current key as a template */ 2451 /* Take current key as a template */
2448 rcu_read_lock(); 2452 rcu_read_lock();
2449 aead = rcu_dereference(tx->aead[key.a 2453 aead = rcu_dereference(tx->aead[key.active ?: KEY_MASTER]);
2450 if (unlikely(!aead)) { 2454 if (unlikely(!aead)) {
2451 rcu_read_unlock(); 2455 rcu_read_unlock();
2452 /* At least one key should ex 2456 /* At least one key should exist for securing */
2453 return; 2457 return;
2454 } 2458 }
2455 2459
2456 /* Lets duplicate it first */ 2460 /* Lets duplicate it first */
2457 skey = kmemdup(aead->key, tipc_aead_k 2461 skey = kmemdup(aead->key, tipc_aead_key_size(aead->key), GFP_ATOMIC);
2458 rcu_read_unlock(); 2462 rcu_read_unlock();
2459 2463
2460 /* Now, generate new key, initiate & 2464 /* Now, generate new key, initiate & distribute it */
2461 if (likely(skey)) { 2465 if (likely(skey)) {
2462 rc = tipc_aead_key_generate(s 2466 rc = tipc_aead_key_generate(skey) ?:
2463 tipc_crypto_key_init(tx, 2467 tipc_crypto_key_init(tx, skey, PER_NODE_KEY, false);
2464 if (likely(rc > 0)) 2468 if (likely(rc > 0))
2465 rc = tipc_crypto_key_ 2469 rc = tipc_crypto_key_distr(tx, rc, NULL);
2466 kfree_sensitive(skey); 2470 kfree_sensitive(skey);
2467 } 2471 }
2468 2472
2469 if (unlikely(rc)) 2473 if (unlikely(rc))
2470 pr_warn_ratelimited("%s: reke 2474 pr_warn_ratelimited("%s: rekeying returns %d\n", tx->name, rc);
2471 2475
2472 resched: 2476 resched:
2473 /* Re-schedule rekeying if any */ 2477 /* Re-schedule rekeying if any */
2474 tipc_crypto_rekeying_sched(tx, false, 2478 tipc_crypto_rekeying_sched(tx, false, 0);
2475 } 2479 }
2476 2480
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