1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | |
4 | Copyright (C) 2014 Intel Corporation |
5 | |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License version 2 as |
8 | published by the Free Software Foundation; |
9 | |
10 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
11 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
12 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
13 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
14 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
15 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
16 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
17 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
18 | |
19 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
20 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
21 | SOFTWARE IS DISCLAIMED. |
22 | */ |
23 | |
24 | #include <linux/debugfs.h> |
25 | |
26 | #include <net/bluetooth/bluetooth.h> |
27 | #include <net/bluetooth/hci_core.h> |
28 | |
29 | #include "ecdh_helper.h" |
30 | #include "smp.h" |
31 | #include "selftest.h" |
32 | |
33 | #if IS_ENABLED(CONFIG_BT_SELFTEST_ECDH) |
34 | |
35 | static const u8 priv_a_1[32] __initconst = { |
36 | 0xbd, 0x1a, 0x3c, 0xcd, 0xa6, 0xb8, 0x99, 0x58, |
37 | 0x99, 0xb7, 0x40, 0xeb, 0x7b, 0x60, 0xff, 0x4a, |
38 | 0x50, 0x3f, 0x10, 0xd2, 0xe3, 0xb3, 0xc9, 0x74, |
39 | 0x38, 0x5f, 0xc5, 0xa3, 0xd4, 0xf6, 0x49, 0x3f, |
40 | }; |
41 | static const u8 priv_b_1[32] __initconst = { |
42 | 0xfd, 0xc5, 0x7f, 0xf4, 0x49, 0xdd, 0x4f, 0x6b, |
43 | 0xfb, 0x7c, 0x9d, 0xf1, 0xc2, 0x9a, 0xcb, 0x59, |
44 | 0x2a, 0xe7, 0xd4, 0xee, 0xfb, 0xfc, 0x0a, 0x90, |
45 | 0x9a, 0xbb, 0xf6, 0x32, 0x3d, 0x8b, 0x18, 0x55, |
46 | }; |
47 | static const u8 pub_a_1[64] __initconst = { |
48 | 0xe6, 0x9d, 0x35, 0x0e, 0x48, 0x01, 0x03, 0xcc, |
49 | 0xdb, 0xfd, 0xf4, 0xac, 0x11, 0x91, 0xf4, 0xef, |
50 | 0xb9, 0xa5, 0xf9, 0xe9, 0xa7, 0x83, 0x2c, 0x5e, |
51 | 0x2c, 0xbe, 0x97, 0xf2, 0xd2, 0x03, 0xb0, 0x20, |
52 | |
53 | 0x8b, 0xd2, 0x89, 0x15, 0xd0, 0x8e, 0x1c, 0x74, |
54 | 0x24, 0x30, 0xed, 0x8f, 0xc2, 0x45, 0x63, 0x76, |
55 | 0x5c, 0x15, 0x52, 0x5a, 0xbf, 0x9a, 0x32, 0x63, |
56 | 0x6d, 0xeb, 0x2a, 0x65, 0x49, 0x9c, 0x80, 0xdc, |
57 | }; |
58 | static const u8 pub_b_1[64] __initconst = { |
59 | 0x90, 0xa1, 0xaa, 0x2f, 0xb2, 0x77, 0x90, 0x55, |
60 | 0x9f, 0xa6, 0x15, 0x86, 0xfd, 0x8a, 0xb5, 0x47, |
61 | 0x00, 0x4c, 0x9e, 0xf1, 0x84, 0x22, 0x59, 0x09, |
62 | 0x96, 0x1d, 0xaf, 0x1f, 0xf0, 0xf0, 0xa1, 0x1e, |
63 | |
64 | 0x4a, 0x21, 0xb1, 0x15, 0xf9, 0xaf, 0x89, 0x5f, |
65 | 0x76, 0x36, 0x8e, 0xe2, 0x30, 0x11, 0x2d, 0x47, |
66 | 0x60, 0x51, 0xb8, 0x9a, 0x3a, 0x70, 0x56, 0x73, |
67 | 0x37, 0xad, 0x9d, 0x42, 0x3e, 0xf3, 0x55, 0x4c, |
68 | }; |
69 | static const u8 dhkey_1[32] __initconst = { |
70 | 0x98, 0xa6, 0xbf, 0x73, 0xf3, 0x34, 0x8d, 0x86, |
71 | 0xf1, 0x66, 0xf8, 0xb4, 0x13, 0x6b, 0x79, 0x99, |
72 | 0x9b, 0x7d, 0x39, 0x0a, 0xa6, 0x10, 0x10, 0x34, |
73 | 0x05, 0xad, 0xc8, 0x57, 0xa3, 0x34, 0x02, 0xec, |
74 | }; |
75 | |
76 | static const u8 priv_a_2[32] __initconst = { |
77 | 0x63, 0x76, 0x45, 0xd0, 0xf7, 0x73, 0xac, 0xb7, |
78 | 0xff, 0xdd, 0x03, 0x72, 0xb9, 0x72, 0x85, 0xb4, |
79 | 0x41, 0xb6, 0x5d, 0x0c, 0x5d, 0x54, 0x84, 0x60, |
80 | 0x1a, 0xa3, 0x9a, 0x3c, 0x69, 0x16, 0xa5, 0x06, |
81 | }; |
82 | static const u8 priv_b_2[32] __initconst = { |
83 | 0xba, 0x30, 0x55, 0x50, 0x19, 0xa2, 0xca, 0xa3, |
84 | 0xa5, 0x29, 0x08, 0xc6, 0xb5, 0x03, 0x88, 0x7e, |
85 | 0x03, 0x2b, 0x50, 0x73, 0xd4, 0x2e, 0x50, 0x97, |
86 | 0x64, 0xcd, 0x72, 0x0d, 0x67, 0xa0, 0x9a, 0x52, |
87 | }; |
88 | static const u8 pub_a_2[64] __initconst = { |
89 | 0xdd, 0x78, 0x5c, 0x74, 0x03, 0x9b, 0x7e, 0x98, |
90 | 0xcb, 0x94, 0x87, 0x4a, 0xad, 0xfa, 0xf8, 0xd5, |
91 | 0x43, 0x3e, 0x5c, 0xaf, 0xea, 0xb5, 0x4c, 0xf4, |
92 | 0x9e, 0x80, 0x79, 0x57, 0x7b, 0xa4, 0x31, 0x2c, |
93 | |
94 | 0x4f, 0x5d, 0x71, 0x43, 0x77, 0x43, 0xf8, 0xea, |
95 | 0xd4, 0x3e, 0xbd, 0x17, 0x91, 0x10, 0x21, 0xd0, |
96 | 0x1f, 0x87, 0x43, 0x8e, 0x40, 0xe2, 0x52, 0xcd, |
97 | 0xbe, 0xdf, 0x98, 0x38, 0x18, 0x12, 0x95, 0x91, |
98 | }; |
99 | static const u8 pub_b_2[64] __initconst = { |
100 | 0xcc, 0x00, 0x65, 0xe1, 0xf5, 0x6c, 0x0d, 0xcf, |
101 | 0xec, 0x96, 0x47, 0x20, 0x66, 0xc9, 0xdb, 0x84, |
102 | 0x81, 0x75, 0xa8, 0x4d, 0xc0, 0xdf, 0xc7, 0x9d, |
103 | 0x1b, 0x3f, 0x3d, 0xf2, 0x3f, 0xe4, 0x65, 0xf4, |
104 | |
105 | 0x79, 0xb2, 0xec, 0xd8, 0xca, 0x55, 0xa1, 0xa8, |
106 | 0x43, 0x4d, 0x6b, 0xca, 0x10, 0xb0, 0xc2, 0x01, |
107 | 0xc2, 0x33, 0x4e, 0x16, 0x24, 0xc4, 0xef, 0xee, |
108 | 0x99, 0xd8, 0xbb, 0xbc, 0x48, 0xd0, 0x01, 0x02, |
109 | }; |
110 | static const u8 dhkey_2[32] __initconst = { |
111 | 0x69, 0xeb, 0x21, 0x32, 0xf2, 0xc6, 0x05, 0x41, |
112 | 0x60, 0x19, 0xcd, 0x5e, 0x94, 0xe1, 0xe6, 0x5f, |
113 | 0x33, 0x07, 0xe3, 0x38, 0x4b, 0x68, 0xe5, 0x62, |
114 | 0x3f, 0x88, 0x6d, 0x2f, 0x3a, 0x84, 0x85, 0xab, |
115 | }; |
116 | |
117 | static const u8 priv_a_3[32] __initconst = { |
118 | 0xbd, 0x1a, 0x3c, 0xcd, 0xa6, 0xb8, 0x99, 0x58, |
119 | 0x99, 0xb7, 0x40, 0xeb, 0x7b, 0x60, 0xff, 0x4a, |
120 | 0x50, 0x3f, 0x10, 0xd2, 0xe3, 0xb3, 0xc9, 0x74, |
121 | 0x38, 0x5f, 0xc5, 0xa3, 0xd4, 0xf6, 0x49, 0x3f, |
122 | }; |
123 | static const u8 pub_a_3[64] __initconst = { |
124 | 0xe6, 0x9d, 0x35, 0x0e, 0x48, 0x01, 0x03, 0xcc, |
125 | 0xdb, 0xfd, 0xf4, 0xac, 0x11, 0x91, 0xf4, 0xef, |
126 | 0xb9, 0xa5, 0xf9, 0xe9, 0xa7, 0x83, 0x2c, 0x5e, |
127 | 0x2c, 0xbe, 0x97, 0xf2, 0xd2, 0x03, 0xb0, 0x20, |
128 | |
129 | 0x8b, 0xd2, 0x89, 0x15, 0xd0, 0x8e, 0x1c, 0x74, |
130 | 0x24, 0x30, 0xed, 0x8f, 0xc2, 0x45, 0x63, 0x76, |
131 | 0x5c, 0x15, 0x52, 0x5a, 0xbf, 0x9a, 0x32, 0x63, |
132 | 0x6d, 0xeb, 0x2a, 0x65, 0x49, 0x9c, 0x80, 0xdc, |
133 | }; |
134 | static const u8 dhkey_3[32] __initconst = { |
135 | 0x2d, 0xab, 0x00, 0x48, 0xcb, 0xb3, 0x7b, 0xda, |
136 | 0x55, 0x7b, 0x8b, 0x72, 0xa8, 0x57, 0x87, 0xc3, |
137 | 0x87, 0x27, 0x99, 0x32, 0xfc, 0x79, 0x5f, 0xae, |
138 | 0x7c, 0x1c, 0xf9, 0x49, 0xe6, 0xd7, 0xaa, 0x70, |
139 | }; |
140 | |
141 | static int __init test_ecdh_sample(struct crypto_kpp *tfm, const u8 priv_a[32], |
142 | const u8 priv_b[32], const u8 pub_a[64], |
143 | const u8 pub_b[64], const u8 dhkey[32]) |
144 | { |
145 | u8 *tmp, *dhkey_a, *dhkey_b; |
146 | int ret; |
147 | |
148 | tmp = kmalloc(size: 64, GFP_KERNEL); |
149 | if (!tmp) |
150 | return -EINVAL; |
151 | |
152 | dhkey_a = &tmp[0]; |
153 | dhkey_b = &tmp[32]; |
154 | |
155 | ret = set_ecdh_privkey(tfm, private_key: priv_a); |
156 | if (ret) |
157 | goto out; |
158 | |
159 | ret = compute_ecdh_secret(tfm, pair_public_key: pub_b, secret: dhkey_a); |
160 | if (ret) |
161 | goto out; |
162 | |
163 | if (memcmp(p: dhkey_a, q: dhkey, size: 32)) { |
164 | ret = -EINVAL; |
165 | goto out; |
166 | } |
167 | |
168 | ret = set_ecdh_privkey(tfm, private_key: priv_b); |
169 | if (ret) |
170 | goto out; |
171 | |
172 | ret = compute_ecdh_secret(tfm, pair_public_key: pub_a, secret: dhkey_b); |
173 | if (ret) |
174 | goto out; |
175 | |
176 | if (memcmp(p: dhkey_b, q: dhkey, size: 32)) |
177 | ret = -EINVAL; |
178 | /* fall through*/ |
179 | out: |
180 | kfree(objp: tmp); |
181 | return ret; |
182 | } |
183 | |
184 | static char test_ecdh_buffer[32]; |
185 | |
186 | static ssize_t test_ecdh_read(struct file *file, char __user *user_buf, |
187 | size_t count, loff_t *ppos) |
188 | { |
189 | return simple_read_from_buffer(to: user_buf, count, ppos, from: test_ecdh_buffer, |
190 | strlen(test_ecdh_buffer)); |
191 | } |
192 | |
193 | static const struct file_operations test_ecdh_fops = { |
194 | .open = simple_open, |
195 | .read = test_ecdh_read, |
196 | .llseek = default_llseek, |
197 | }; |
198 | |
199 | static int __init test_ecdh(void) |
200 | { |
201 | struct crypto_kpp *tfm; |
202 | ktime_t calltime, delta, rettime; |
203 | unsigned long long duration = 0; |
204 | int err; |
205 | |
206 | calltime = ktime_get(); |
207 | |
208 | tfm = crypto_alloc_kpp(alg_name: "ecdh-nist-p256" , type: 0, mask: 0); |
209 | if (IS_ERR(ptr: tfm)) { |
210 | BT_ERR("Unable to create ECDH crypto context" ); |
211 | err = PTR_ERR(ptr: tfm); |
212 | goto done; |
213 | } |
214 | |
215 | err = test_ecdh_sample(tfm, priv_a: priv_a_1, priv_b: priv_b_1, pub_a: pub_a_1, pub_b: pub_b_1, |
216 | dhkey: dhkey_1); |
217 | if (err) { |
218 | BT_ERR("ECDH sample 1 failed" ); |
219 | goto done; |
220 | } |
221 | |
222 | err = test_ecdh_sample(tfm, priv_a: priv_a_2, priv_b: priv_b_2, pub_a: pub_a_2, pub_b: pub_b_2, |
223 | dhkey: dhkey_2); |
224 | if (err) { |
225 | BT_ERR("ECDH sample 2 failed" ); |
226 | goto done; |
227 | } |
228 | |
229 | err = test_ecdh_sample(tfm, priv_a: priv_a_3, priv_b: priv_a_3, pub_a: pub_a_3, pub_b: pub_a_3, |
230 | dhkey: dhkey_3); |
231 | if (err) { |
232 | BT_ERR("ECDH sample 3 failed" ); |
233 | goto done; |
234 | } |
235 | |
236 | crypto_free_kpp(tfm); |
237 | |
238 | rettime = ktime_get(); |
239 | delta = ktime_sub(rettime, calltime); |
240 | duration = (unsigned long long) ktime_to_ns(kt: delta) >> 10; |
241 | |
242 | BT_INFO("ECDH test passed in %llu usecs" , duration); |
243 | |
244 | done: |
245 | if (!err) |
246 | snprintf(buf: test_ecdh_buffer, size: sizeof(test_ecdh_buffer), |
247 | fmt: "PASS (%llu usecs)\n" , duration); |
248 | else |
249 | snprintf(buf: test_ecdh_buffer, size: sizeof(test_ecdh_buffer), fmt: "FAIL\n" ); |
250 | |
251 | debugfs_create_file(name: "selftest_ecdh" , mode: 0444, parent: bt_debugfs, NULL, |
252 | fops: &test_ecdh_fops); |
253 | |
254 | return err; |
255 | } |
256 | |
257 | #else |
258 | |
259 | static inline int test_ecdh(void) |
260 | { |
261 | return 0; |
262 | } |
263 | |
264 | #endif |
265 | |
266 | static int __init run_selftest(void) |
267 | { |
268 | int err; |
269 | |
270 | BT_INFO("Starting self testing" ); |
271 | |
272 | err = test_ecdh(); |
273 | if (err) |
274 | goto done; |
275 | |
276 | err = bt_selftest_smp(); |
277 | |
278 | done: |
279 | BT_INFO("Finished self testing" ); |
280 | |
281 | return err; |
282 | } |
283 | |
284 | #if IS_MODULE(CONFIG_BT) |
285 | |
286 | /* This is run when CONFIG_BT_SELFTEST=y and CONFIG_BT=m and is just a |
287 | * wrapper to allow running this at module init. |
288 | * |
289 | * If CONFIG_BT_SELFTEST=n, then this code is not compiled at all. |
290 | */ |
291 | int __init bt_selftest(void) |
292 | { |
293 | return run_selftest(); |
294 | } |
295 | |
296 | #else |
297 | |
298 | /* This is run when CONFIG_BT_SELFTEST=y and CONFIG_BT=y and is run |
299 | * via late_initcall() as last item in the initialization sequence. |
300 | * |
301 | * If CONFIG_BT_SELFTEST=n, then this code is not compiled at all. |
302 | */ |
303 | static int __init bt_selftest_init(void) |
304 | { |
305 | return run_selftest(); |
306 | } |
307 | late_initcall(bt_selftest_init); |
308 | |
309 | #endif |
310 | |