Commit | Line | Data |
---|---|---|
eb492e01 AB |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License version 2 as | |
7 | published by the Free Software Foundation; | |
8 | ||
9 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
10 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
11 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
12 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
13 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
14 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
15 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
16 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
17 | ||
18 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
19 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
20 | SOFTWARE IS DISCLAIMED. | |
21 | */ | |
22 | ||
23 | #include <net/bluetooth/bluetooth.h> | |
24 | #include <net/bluetooth/hci_core.h> | |
25 | #include <net/bluetooth/l2cap.h> | |
26 | #include <net/bluetooth/smp.h> | |
d22ef0bc | 27 | #include <linux/crypto.h> |
f70490e6 | 28 | #include <linux/scatterlist.h> |
d22ef0bc AB |
29 | #include <crypto/b128ops.h> |
30 | ||
5d3de7df VCG |
31 | #define SMP_TIMEOUT 30000 /* 30 seconds */ |
32 | ||
d22ef0bc AB |
33 | static inline void swap128(u8 src[16], u8 dst[16]) |
34 | { | |
35 | int i; | |
36 | for (i = 0; i < 16; i++) | |
37 | dst[15 - i] = src[i]; | |
38 | } | |
39 | ||
40 | static inline void swap56(u8 src[7], u8 dst[7]) | |
41 | { | |
42 | int i; | |
43 | for (i = 0; i < 7; i++) | |
44 | dst[6 - i] = src[i]; | |
45 | } | |
46 | ||
47 | static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r) | |
48 | { | |
49 | struct blkcipher_desc desc; | |
50 | struct scatterlist sg; | |
51 | int err, iv_len; | |
52 | unsigned char iv[128]; | |
53 | ||
54 | if (tfm == NULL) { | |
55 | BT_ERR("tfm %p", tfm); | |
56 | return -EINVAL; | |
57 | } | |
58 | ||
59 | desc.tfm = tfm; | |
60 | desc.flags = 0; | |
61 | ||
62 | err = crypto_blkcipher_setkey(tfm, k, 16); | |
63 | if (err) { | |
64 | BT_ERR("cipher setkey failed: %d", err); | |
65 | return err; | |
66 | } | |
67 | ||
68 | sg_init_one(&sg, r, 16); | |
69 | ||
70 | iv_len = crypto_blkcipher_ivsize(tfm); | |
71 | if (iv_len) { | |
72 | memset(&iv, 0xff, iv_len); | |
73 | crypto_blkcipher_set_iv(tfm, iv, iv_len); | |
74 | } | |
75 | ||
76 | err = crypto_blkcipher_encrypt(&desc, &sg, &sg, 16); | |
77 | if (err) | |
78 | BT_ERR("Encrypt data error %d", err); | |
79 | ||
80 | return err; | |
81 | } | |
82 | ||
83 | static int smp_c1(struct crypto_blkcipher *tfm, u8 k[16], u8 r[16], | |
84 | u8 preq[7], u8 pres[7], u8 _iat, bdaddr_t *ia, | |
85 | u8 _rat, bdaddr_t *ra, u8 res[16]) | |
86 | { | |
87 | u8 p1[16], p2[16]; | |
88 | int err; | |
89 | ||
90 | memset(p1, 0, 16); | |
91 | ||
92 | /* p1 = pres || preq || _rat || _iat */ | |
93 | swap56(pres, p1); | |
94 | swap56(preq, p1 + 7); | |
95 | p1[14] = _rat; | |
96 | p1[15] = _iat; | |
97 | ||
98 | memset(p2, 0, 16); | |
99 | ||
100 | /* p2 = padding || ia || ra */ | |
101 | baswap((bdaddr_t *) (p2 + 4), ia); | |
102 | baswap((bdaddr_t *) (p2 + 10), ra); | |
103 | ||
104 | /* res = r XOR p1 */ | |
105 | u128_xor((u128 *) res, (u128 *) r, (u128 *) p1); | |
106 | ||
107 | /* res = e(k, res) */ | |
108 | err = smp_e(tfm, k, res); | |
109 | if (err) { | |
110 | BT_ERR("Encrypt data error"); | |
111 | return err; | |
112 | } | |
113 | ||
114 | /* res = res XOR p2 */ | |
115 | u128_xor((u128 *) res, (u128 *) res, (u128 *) p2); | |
116 | ||
117 | /* res = e(k, res) */ | |
118 | err = smp_e(tfm, k, res); | |
119 | if (err) | |
120 | BT_ERR("Encrypt data error"); | |
121 | ||
122 | return err; | |
123 | } | |
124 | ||
125 | static int smp_s1(struct crypto_blkcipher *tfm, u8 k[16], | |
126 | u8 r1[16], u8 r2[16], u8 _r[16]) | |
127 | { | |
128 | int err; | |
129 | ||
130 | /* Just least significant octets from r1 and r2 are considered */ | |
131 | memcpy(_r, r1 + 8, 8); | |
132 | memcpy(_r + 8, r2 + 8, 8); | |
133 | ||
134 | err = smp_e(tfm, k, _r); | |
135 | if (err) | |
136 | BT_ERR("Encrypt data error"); | |
137 | ||
138 | return err; | |
139 | } | |
140 | ||
141 | static int smp_rand(u8 *buf) | |
142 | { | |
143 | get_random_bytes(buf, 16); | |
144 | ||
145 | return 0; | |
146 | } | |
eb492e01 AB |
147 | |
148 | static struct sk_buff *smp_build_cmd(struct l2cap_conn *conn, u8 code, | |
149 | u16 dlen, void *data) | |
150 | { | |
151 | struct sk_buff *skb; | |
152 | struct l2cap_hdr *lh; | |
153 | int len; | |
154 | ||
155 | len = L2CAP_HDR_SIZE + sizeof(code) + dlen; | |
156 | ||
157 | if (len > conn->mtu) | |
158 | return NULL; | |
159 | ||
160 | skb = bt_skb_alloc(len, GFP_ATOMIC); | |
161 | if (!skb) | |
162 | return NULL; | |
163 | ||
164 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); | |
165 | lh->len = cpu_to_le16(sizeof(code) + dlen); | |
166 | lh->cid = cpu_to_le16(L2CAP_CID_SMP); | |
167 | ||
168 | memcpy(skb_put(skb, sizeof(code)), &code, sizeof(code)); | |
169 | ||
170 | memcpy(skb_put(skb, dlen), data, dlen); | |
171 | ||
172 | return skb; | |
173 | } | |
174 | ||
175 | static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data) | |
176 | { | |
177 | struct sk_buff *skb = smp_build_cmd(conn, code, len, data); | |
178 | ||
179 | BT_DBG("code 0x%2.2x", code); | |
180 | ||
181 | if (!skb) | |
182 | return; | |
183 | ||
184 | hci_send_acl(conn->hcon, skb, 0); | |
185 | } | |
186 | ||
da85e5e5 VCG |
187 | static __u8 seclevel_to_authreq(__u8 level) |
188 | { | |
189 | switch (level) { | |
190 | case BT_SECURITY_HIGH: | |
191 | /* Right now we don't support bonding */ | |
192 | return SMP_AUTH_MITM; | |
193 | ||
194 | default: | |
195 | return SMP_AUTH_NONE; | |
196 | } | |
197 | } | |
198 | ||
b8e66eac VCG |
199 | static void build_pairing_cmd(struct l2cap_conn *conn, |
200 | struct smp_cmd_pairing *cmd, __u8 authreq) | |
201 | { | |
202 | cmd->io_capability = conn->hcon->io_capability; | |
203 | cmd->oob_flag = SMP_OOB_NOT_PRESENT; | |
3158c50c | 204 | cmd->max_key_size = SMP_MAX_ENC_KEY_SIZE; |
b8e66eac VCG |
205 | cmd->init_key_dist = 0x00; |
206 | cmd->resp_key_dist = 0x00; | |
207 | cmd->auth_req = authreq; | |
208 | } | |
209 | ||
3158c50c VCG |
210 | static u8 check_enc_key_size(struct l2cap_conn *conn, __u8 max_key_size) |
211 | { | |
212 | if ((max_key_size > SMP_MAX_ENC_KEY_SIZE) || | |
213 | (max_key_size < SMP_MIN_ENC_KEY_SIZE)) | |
214 | return SMP_ENC_KEY_SIZE; | |
215 | ||
216 | conn->smp_key_size = max_key_size; | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
da85e5e5 | 221 | static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb) |
88ba43b6 | 222 | { |
3158c50c VCG |
223 | struct smp_cmd_pairing rsp, *req = (void *) skb->data; |
224 | u8 key_size; | |
88ba43b6 AB |
225 | |
226 | BT_DBG("conn %p", conn); | |
227 | ||
f01ead31 | 228 | conn->preq[0] = SMP_CMD_PAIRING_REQ; |
3158c50c VCG |
229 | memcpy(&conn->preq[1], req, sizeof(*req)); |
230 | skb_pull(skb, sizeof(*req)); | |
88ba43b6 | 231 | |
3158c50c | 232 | if (req->oob_flag) |
da85e5e5 VCG |
233 | return SMP_OOB_NOT_AVAIL; |
234 | ||
235 | /* We didn't start the pairing, so no requirements */ | |
3158c50c VCG |
236 | build_pairing_cmd(conn, &rsp, SMP_AUTH_NONE); |
237 | ||
238 | key_size = min(req->max_key_size, rsp.max_key_size); | |
239 | if (check_enc_key_size(conn, key_size)) | |
240 | return SMP_ENC_KEY_SIZE; | |
88ba43b6 | 241 | |
7d24ddcc AB |
242 | /* Just works */ |
243 | memset(conn->tk, 0, sizeof(conn->tk)); | |
244 | ||
f01ead31 | 245 | conn->prsp[0] = SMP_CMD_PAIRING_RSP; |
3158c50c | 246 | memcpy(&conn->prsp[1], &rsp, sizeof(rsp)); |
f01ead31 | 247 | |
3158c50c | 248 | smp_send_cmd(conn, SMP_CMD_PAIRING_RSP, sizeof(rsp), &rsp); |
da85e5e5 | 249 | |
5d3de7df VCG |
250 | mod_timer(&conn->security_timer, jiffies + |
251 | msecs_to_jiffies(SMP_TIMEOUT)); | |
252 | ||
da85e5e5 | 253 | return 0; |
88ba43b6 AB |
254 | } |
255 | ||
da85e5e5 | 256 | static u8 smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb) |
88ba43b6 | 257 | { |
3158c50c | 258 | struct smp_cmd_pairing *req, *rsp = (void *) skb->data; |
88ba43b6 | 259 | struct smp_cmd_pairing_confirm cp; |
7d24ddcc AB |
260 | struct crypto_blkcipher *tfm = conn->hcon->hdev->tfm; |
261 | int ret; | |
3158c50c | 262 | u8 res[16], key_size; |
88ba43b6 AB |
263 | |
264 | BT_DBG("conn %p", conn); | |
265 | ||
3158c50c VCG |
266 | skb_pull(skb, sizeof(*rsp)); |
267 | ||
268 | req = (void *) &conn->preq[1]; | |
da85e5e5 | 269 | |
3158c50c VCG |
270 | key_size = min(req->max_key_size, rsp->max_key_size); |
271 | if (check_enc_key_size(conn, key_size)) | |
272 | return SMP_ENC_KEY_SIZE; | |
273 | ||
274 | if (rsp->oob_flag) | |
da85e5e5 VCG |
275 | return SMP_OOB_NOT_AVAIL; |
276 | ||
7d24ddcc AB |
277 | /* Just works */ |
278 | memset(conn->tk, 0, sizeof(conn->tk)); | |
88ba43b6 | 279 | |
f01ead31 | 280 | conn->prsp[0] = SMP_CMD_PAIRING_RSP; |
3158c50c | 281 | memcpy(&conn->prsp[1], rsp, sizeof(*rsp)); |
f01ead31 | 282 | |
7d24ddcc AB |
283 | ret = smp_rand(conn->prnd); |
284 | if (ret) | |
da85e5e5 | 285 | return SMP_UNSPECIFIED; |
7d24ddcc AB |
286 | |
287 | ret = smp_c1(tfm, conn->tk, conn->prnd, conn->preq, conn->prsp, 0, | |
288 | conn->src, conn->hcon->dst_type, conn->dst, res); | |
289 | if (ret) | |
da85e5e5 | 290 | return SMP_UNSPECIFIED; |
7d24ddcc AB |
291 | |
292 | swap128(res, cp.confirm_val); | |
293 | ||
88ba43b6 | 294 | smp_send_cmd(conn, SMP_CMD_PAIRING_CONFIRM, sizeof(cp), &cp); |
da85e5e5 VCG |
295 | |
296 | return 0; | |
88ba43b6 AB |
297 | } |
298 | ||
da85e5e5 | 299 | static u8 smp_cmd_pairing_confirm(struct l2cap_conn *conn, struct sk_buff *skb) |
88ba43b6 | 300 | { |
7d24ddcc AB |
301 | struct crypto_blkcipher *tfm = conn->hcon->hdev->tfm; |
302 | ||
88ba43b6 AB |
303 | BT_DBG("conn %p %s", conn, conn->hcon->out ? "master" : "slave"); |
304 | ||
7d24ddcc AB |
305 | memcpy(conn->pcnf, skb->data, sizeof(conn->pcnf)); |
306 | skb_pull(skb, sizeof(conn->pcnf)); | |
88ba43b6 | 307 | |
7d24ddcc AB |
308 | if (conn->hcon->out) { |
309 | u8 random[16]; | |
88ba43b6 | 310 | |
7d24ddcc | 311 | swap128(conn->prnd, random); |
88ba43b6 | 312 | smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(random), |
7d24ddcc | 313 | random); |
88ba43b6 | 314 | } else { |
7d24ddcc AB |
315 | struct smp_cmd_pairing_confirm cp; |
316 | int ret; | |
317 | u8 res[16]; | |
88ba43b6 | 318 | |
7d24ddcc AB |
319 | ret = smp_rand(conn->prnd); |
320 | if (ret) | |
da85e5e5 | 321 | return SMP_UNSPECIFIED; |
88ba43b6 | 322 | |
7d24ddcc AB |
323 | ret = smp_c1(tfm, conn->tk, conn->prnd, conn->preq, conn->prsp, |
324 | conn->hcon->dst_type, conn->dst, | |
325 | 0, conn->src, res); | |
326 | if (ret) | |
da85e5e5 | 327 | return SMP_CONFIRM_FAILED; |
7d24ddcc AB |
328 | |
329 | swap128(res, cp.confirm_val); | |
330 | ||
331 | smp_send_cmd(conn, SMP_CMD_PAIRING_CONFIRM, sizeof(cp), &cp); | |
88ba43b6 | 332 | } |
da85e5e5 | 333 | |
5d3de7df VCG |
334 | mod_timer(&conn->security_timer, jiffies + |
335 | msecs_to_jiffies(SMP_TIMEOUT)); | |
336 | ||
da85e5e5 | 337 | return 0; |
88ba43b6 AB |
338 | } |
339 | ||
da85e5e5 | 340 | static u8 smp_cmd_pairing_random(struct l2cap_conn *conn, struct sk_buff *skb) |
88ba43b6 | 341 | { |
a7a595f6 VCG |
342 | struct hci_conn *hcon = conn->hcon; |
343 | struct crypto_blkcipher *tfm = hcon->hdev->tfm; | |
7d24ddcc | 344 | int ret; |
9b3d6740 | 345 | u8 key[16], res[16], random[16], confirm[16]; |
7d24ddcc AB |
346 | |
347 | swap128(skb->data, random); | |
348 | skb_pull(skb, sizeof(random)); | |
349 | ||
a7a595f6 VCG |
350 | memset(hcon->ltk, 0, sizeof(hcon->ltk)); |
351 | ||
7d24ddcc AB |
352 | if (conn->hcon->out) |
353 | ret = smp_c1(tfm, conn->tk, random, conn->preq, conn->prsp, 0, | |
354 | conn->src, conn->hcon->dst_type, conn->dst, | |
355 | res); | |
356 | else | |
357 | ret = smp_c1(tfm, conn->tk, random, conn->preq, conn->prsp, | |
358 | conn->hcon->dst_type, conn->dst, 0, conn->src, | |
359 | res); | |
360 | if (ret) | |
da85e5e5 | 361 | return SMP_UNSPECIFIED; |
88ba43b6 AB |
362 | |
363 | BT_DBG("conn %p %s", conn, conn->hcon->out ? "master" : "slave"); | |
364 | ||
7d24ddcc AB |
365 | swap128(res, confirm); |
366 | ||
367 | if (memcmp(conn->pcnf, confirm, sizeof(conn->pcnf)) != 0) { | |
7d24ddcc | 368 | BT_ERR("Pairing failed (confirmation values mismatch)"); |
da85e5e5 | 369 | return SMP_CONFIRM_FAILED; |
7d24ddcc | 370 | } |
88ba43b6 AB |
371 | |
372 | if (conn->hcon->out) { | |
a7a595f6 VCG |
373 | __le16 ediv; |
374 | u8 rand[8]; | |
375 | ||
7d24ddcc | 376 | smp_s1(tfm, conn->tk, random, conn->prnd, key); |
a7a595f6 | 377 | swap128(key, hcon->ltk); |
7d24ddcc | 378 | |
3158c50c VCG |
379 | memset(hcon->ltk + conn->smp_key_size, 0, |
380 | SMP_MAX_ENC_KEY_SIZE - conn->smp_key_size); | |
381 | ||
a7a595f6 VCG |
382 | memset(rand, 0, sizeof(rand)); |
383 | ediv = 0; | |
384 | hci_le_start_enc(hcon, ediv, rand, hcon->ltk); | |
88ba43b6 | 385 | } else { |
7d24ddcc AB |
386 | u8 r[16]; |
387 | ||
388 | swap128(conn->prnd, r); | |
389 | smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(r), r); | |
390 | ||
391 | smp_s1(tfm, conn->tk, conn->prnd, random, key); | |
a7a595f6 | 392 | swap128(key, hcon->ltk); |
3158c50c VCG |
393 | |
394 | memset(hcon->ltk + conn->smp_key_size, 0, | |
395 | SMP_MAX_ENC_KEY_SIZE - conn->smp_key_size); | |
88ba43b6 | 396 | } |
da85e5e5 VCG |
397 | |
398 | return 0; | |
88ba43b6 AB |
399 | } |
400 | ||
da85e5e5 | 401 | static u8 smp_cmd_security_req(struct l2cap_conn *conn, struct sk_buff *skb) |
88ba43b6 AB |
402 | { |
403 | struct smp_cmd_security_req *rp = (void *) skb->data; | |
404 | struct smp_cmd_pairing cp; | |
f1cb9af5 | 405 | struct hci_conn *hcon = conn->hcon; |
88ba43b6 AB |
406 | |
407 | BT_DBG("conn %p", conn); | |
408 | ||
f1cb9af5 | 409 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &hcon->pend)) |
da85e5e5 | 410 | return 0; |
f1cb9af5 | 411 | |
88ba43b6 | 412 | skb_pull(skb, sizeof(*rp)); |
88ba43b6 | 413 | |
da85e5e5 VCG |
414 | memset(&cp, 0, sizeof(cp)); |
415 | build_pairing_cmd(conn, &cp, rp->auth_req); | |
88ba43b6 | 416 | |
f01ead31 AB |
417 | conn->preq[0] = SMP_CMD_PAIRING_REQ; |
418 | memcpy(&conn->preq[1], &cp, sizeof(cp)); | |
419 | ||
88ba43b6 | 420 | smp_send_cmd(conn, SMP_CMD_PAIRING_REQ, sizeof(cp), &cp); |
f1cb9af5 | 421 | |
5d3de7df VCG |
422 | mod_timer(&conn->security_timer, jiffies + |
423 | msecs_to_jiffies(SMP_TIMEOUT)); | |
424 | ||
f1cb9af5 | 425 | set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->pend); |
f1cb9af5 | 426 | |
da85e5e5 | 427 | return 0; |
88ba43b6 AB |
428 | } |
429 | ||
eb492e01 AB |
430 | int smp_conn_security(struct l2cap_conn *conn, __u8 sec_level) |
431 | { | |
3a0259bb | 432 | struct hci_conn *hcon = conn->hcon; |
eb492e01 AB |
433 | __u8 authreq; |
434 | ||
3a0259bb VCG |
435 | BT_DBG("conn %p hcon %p level 0x%2.2x", conn, hcon, sec_level); |
436 | ||
437 | if (IS_ERR(hcon->hdev->tfm)) | |
438 | return 1; | |
eb492e01 | 439 | |
f1cb9af5 VCG |
440 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &hcon->pend)) |
441 | return 0; | |
eb492e01 | 442 | |
f1cb9af5 VCG |
443 | if (sec_level == BT_SECURITY_LOW) |
444 | return 1; | |
eb492e01 | 445 | |
f1cb9af5 | 446 | if (hcon->sec_level >= sec_level) |
eb492e01 | 447 | return 1; |
f1cb9af5 VCG |
448 | |
449 | authreq = seclevel_to_authreq(sec_level); | |
eb492e01 | 450 | |
3a0259bb | 451 | if (hcon->link_mode & HCI_LM_MASTER) { |
eb492e01 | 452 | struct smp_cmd_pairing cp; |
f01ead31 | 453 | |
da85e5e5 | 454 | build_pairing_cmd(conn, &cp, authreq); |
f01ead31 AB |
455 | conn->preq[0] = SMP_CMD_PAIRING_REQ; |
456 | memcpy(&conn->preq[1], &cp, sizeof(cp)); | |
457 | ||
5d3de7df VCG |
458 | mod_timer(&conn->security_timer, jiffies + |
459 | msecs_to_jiffies(SMP_TIMEOUT)); | |
460 | ||
eb492e01 AB |
461 | smp_send_cmd(conn, SMP_CMD_PAIRING_REQ, sizeof(cp), &cp); |
462 | } else { | |
463 | struct smp_cmd_security_req cp; | |
464 | cp.auth_req = authreq; | |
465 | smp_send_cmd(conn, SMP_CMD_SECURITY_REQ, sizeof(cp), &cp); | |
466 | } | |
467 | ||
f1cb9af5 VCG |
468 | hcon->pending_sec_level = sec_level; |
469 | set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->pend); | |
470 | ||
eb492e01 AB |
471 | return 0; |
472 | } | |
473 | ||
474 | int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) | |
475 | { | |
476 | __u8 code = skb->data[0]; | |
477 | __u8 reason; | |
478 | int err = 0; | |
479 | ||
3a0259bb VCG |
480 | if (IS_ERR(conn->hcon->hdev->tfm)) { |
481 | err = PTR_ERR(conn->hcon->hdev->tfm); | |
482 | reason = SMP_PAIRING_NOTSUPP; | |
483 | goto done; | |
484 | } | |
485 | ||
eb492e01 AB |
486 | skb_pull(skb, sizeof(code)); |
487 | ||
488 | switch (code) { | |
489 | case SMP_CMD_PAIRING_REQ: | |
da85e5e5 | 490 | reason = smp_cmd_pairing_req(conn, skb); |
eb492e01 AB |
491 | break; |
492 | ||
493 | case SMP_CMD_PAIRING_FAIL: | |
da85e5e5 VCG |
494 | reason = 0; |
495 | err = -EPERM; | |
eb492e01 AB |
496 | break; |
497 | ||
498 | case SMP_CMD_PAIRING_RSP: | |
da85e5e5 | 499 | reason = smp_cmd_pairing_rsp(conn, skb); |
88ba43b6 AB |
500 | break; |
501 | ||
502 | case SMP_CMD_SECURITY_REQ: | |
da85e5e5 | 503 | reason = smp_cmd_security_req(conn, skb); |
88ba43b6 AB |
504 | break; |
505 | ||
eb492e01 | 506 | case SMP_CMD_PAIRING_CONFIRM: |
da85e5e5 | 507 | reason = smp_cmd_pairing_confirm(conn, skb); |
88ba43b6 AB |
508 | break; |
509 | ||
eb492e01 | 510 | case SMP_CMD_PAIRING_RANDOM: |
da85e5e5 | 511 | reason = smp_cmd_pairing_random(conn, skb); |
88ba43b6 AB |
512 | break; |
513 | ||
eb492e01 AB |
514 | case SMP_CMD_ENCRYPT_INFO: |
515 | case SMP_CMD_MASTER_IDENT: | |
516 | case SMP_CMD_IDENT_INFO: | |
517 | case SMP_CMD_IDENT_ADDR_INFO: | |
518 | case SMP_CMD_SIGN_INFO: | |
eb492e01 AB |
519 | default: |
520 | BT_DBG("Unknown command code 0x%2.2x", code); | |
521 | ||
522 | reason = SMP_CMD_NOTSUPP; | |
eb492e01 | 523 | err = -EOPNOTSUPP; |
3a0259bb | 524 | goto done; |
eb492e01 AB |
525 | } |
526 | ||
3a0259bb VCG |
527 | done: |
528 | if (reason) | |
529 | smp_send_cmd(conn, SMP_CMD_PAIRING_FAIL, sizeof(reason), | |
530 | &reason); | |
531 | ||
eb492e01 AB |
532 | kfree_skb(skb); |
533 | return err; | |
534 | } |