1 /* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 *
5 * Tests for api library, new style structs
6 */
7
8 #include <stdio.h>
9
10 #include "2sysincludes.h"
11 #include "2api.h"
12 #include "2common.h"
13 #include "2misc.h"
14 #include "2nvstorage.h"
15 #include "2rsa.h"
16 #include "2secdata.h"
17
18 #include "vb2_common.h"
19
20 #include "host_key2.h"
21 #include "host_signature2.h"
22
23 #include "test_common.h"
24
25 /* Common context for tests */
26 static uint8_t workbuf[VB2_WORKBUF_RECOMMENDED_SIZE]
27 __attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
28 static struct vb2_context ctx;
29 static struct vb2_shared_data *sd;
30
31 static const uint8_t mock_body[320] = "Mock body";
32 static const int mock_body_size = sizeof(mock_body);
33 static const int mock_hash_alg = VB2_HASH_SHA256;
34 static int mock_sig_size;
35
36 static const struct vb2_guid test_guid[4] = {
37 {.raw = {0x11}},
38 {.raw = {0x22}},
39 {.raw = {0x33}},
40 {.raw = {0x44}},
41 };
42
43 /* Mocked function data */
44
45 static enum {
46 HWCRYPTO_DISABLED,
47 HWCRYPTO_ENABLED,
48 HWCRYPTO_FORBIDDEN,
49 } hwcrypto_state;
50
51 static struct vb2_digest_context hwcrypto_emulation_dc;
52
53 static int retval_hwcrypto;
54 static int retval_vb2_load_fw_keyblock;
55 static int retval_vb2_load_fw_preamble;
56
57 /* Type of test to reset for */
58 enum reset_type {
59 FOR_MISC,
60 FOR_EXTEND_HASH,
61 FOR_CHECK_HASH,
62 };
63
reset_common_data(enum reset_type t)64 static void reset_common_data(enum reset_type t)
65 {
66 const struct vb2_private_key *hash_key;
67 struct vb2_fw_preamble *pre;
68 struct vb2_signature *sig;
69 uint32_t sig_offset;
70
71 int i;
72
73 memset(workbuf, 0xaa, sizeof(workbuf));
74
75 memset(&ctx, 0, sizeof(ctx));
76 ctx.workbuf = workbuf;
77 ctx.workbuf_size = sizeof(workbuf);
78
79 vb2_init_context(&ctx);
80 sd = vb2_get_sd(&ctx);
81
82 vb2_nv_init(&ctx);
83
84 vb2_secdata_create(&ctx);
85 vb2_secdata_init(&ctx);
86
87 memset(&hwcrypto_emulation_dc, 0, sizeof(hwcrypto_emulation_dc));
88 retval_hwcrypto = VB2_SUCCESS;
89 retval_vb2_load_fw_keyblock = VB2_SUCCESS;
90 retval_vb2_load_fw_preamble = VB2_SUCCESS;
91
92 vb2_private_key_hash(&hash_key, mock_hash_alg);
93
94 sd->workbuf_preamble_offset = ctx.workbuf_used;
95 pre = (struct vb2_fw_preamble *)
96 (ctx.workbuf + sd->workbuf_preamble_offset);
97 pre->hash_count = 3;
98 pre->hash_offset = sig_offset = sizeof(*pre);
99 if (hwcrypto_state == HWCRYPTO_FORBIDDEN)
100 pre->flags = VB2_FIRMWARE_PREAMBLE_DISALLOW_HWCRYPTO;
101 else
102 pre->flags = 0;
103
104 for (i = 0; i < 3; i++) {
105 vb2_sign_data(&sig, mock_body, mock_body_size - 16 * i,
106 hash_key, NULL);
107 memcpy(&sig->guid, test_guid + i, sizeof(sig->guid));
108 memcpy((uint8_t *)pre + sig_offset, sig, sig->c.total_size);
109 sig_offset += sig->c.total_size;
110 mock_sig_size = sig->c.total_size;
111 free(sig);
112 }
113
114 sd->workbuf_preamble_size = sig_offset;
115 ctx.workbuf_used = sd->workbuf_preamble_offset
116 + sd->workbuf_preamble_size;
117
118 if (t == FOR_EXTEND_HASH || t == FOR_CHECK_HASH)
119 vb2api_init_hash2(&ctx, test_guid, NULL);
120
121 if (t == FOR_CHECK_HASH)
122 vb2api_extend_hash(&ctx, mock_body, mock_body_size);
123 };
124
125 /* Mocked functions */
126
vb2_load_fw_keyblock(struct vb2_context * ctx)127 int vb2_load_fw_keyblock(struct vb2_context *ctx)
128 {
129 return retval_vb2_load_fw_keyblock;
130 }
131
vb2_load_fw_preamble(struct vb2_context * ctx)132 int vb2_load_fw_preamble(struct vb2_context *ctx)
133 {
134 return retval_vb2_load_fw_preamble;
135 }
136
vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg,uint32_t data_size)137 int vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg,
138 uint32_t data_size)
139 {
140 vb2_digest_init(&hwcrypto_emulation_dc, hash_alg);
141
142 switch (hwcrypto_state) {
143 case HWCRYPTO_DISABLED:
144 return VB2_ERROR_EX_HWCRYPTO_UNSUPPORTED;
145 case HWCRYPTO_ENABLED:
146 if (hash_alg != mock_hash_alg)
147 return VB2_ERROR_SHA_INIT_ALGORITHM;
148 else
149 return retval_hwcrypto;
150 case HWCRYPTO_FORBIDDEN:
151 default:
152 return VB2_ERROR_UNKNOWN;
153 }
154 }
155
vb2ex_hwcrypto_digest_extend(const uint8_t * buf,uint32_t size)156 int vb2ex_hwcrypto_digest_extend(const uint8_t *buf,
157 uint32_t size)
158 {
159 vb2_digest_extend(&hwcrypto_emulation_dc, buf, size);
160
161 if (hwcrypto_state != HWCRYPTO_ENABLED)
162 return VB2_ERROR_UNKNOWN;
163
164 return retval_hwcrypto;
165 }
166
vb2ex_hwcrypto_digest_finalize(uint8_t * digest,uint32_t digest_size)167 int vb2ex_hwcrypto_digest_finalize(uint8_t *digest,
168 uint32_t digest_size)
169 {
170 vb2_digest_finalize(&hwcrypto_emulation_dc, digest, digest_size);
171
172 if (hwcrypto_state != HWCRYPTO_ENABLED)
173 return VB2_ERROR_UNKNOWN;
174
175 return retval_hwcrypto;
176 }
177
178 /* Tests */
179
phase3_tests(void)180 static void phase3_tests(void)
181 {
182 reset_common_data(FOR_MISC);
183 TEST_SUCC(vb2api_fw_phase3(&ctx), "phase3 good");
184
185 reset_common_data(FOR_MISC);
186 retval_vb2_load_fw_keyblock = VB2_ERROR_MOCK;
187 TEST_EQ(vb2api_fw_phase3(&ctx), VB2_ERROR_MOCK, "phase3 keyblock");
188 TEST_EQ(vb2_nv_get(&ctx, VB2_NV_RECOVERY_REQUEST),
189 VB2_RECOVERY_RO_INVALID_RW, " recovery reason");
190
191 reset_common_data(FOR_MISC);
192 retval_vb2_load_fw_preamble = VB2_ERROR_MOCK;
193 TEST_EQ(vb2api_fw_phase3(&ctx), VB2_ERROR_MOCK, "phase3 keyblock");
194 TEST_EQ(vb2_nv_get(&ctx, VB2_NV_RECOVERY_REQUEST),
195 VB2_RECOVERY_RO_INVALID_RW, " recovery reason");
196 }
197
init_hash_tests(void)198 static void init_hash_tests(void)
199 {
200 struct vb2_fw_preamble *pre;
201 struct vb2_signature *sig;
202 int wb_used_before;
203 uint32_t size;
204
205 reset_common_data(FOR_MISC);
206 pre = (struct vb2_fw_preamble *)
207 (ctx.workbuf + sd->workbuf_preamble_offset);
208 sig = (struct vb2_signature *)((uint8_t *)pre + pre->hash_offset);
209
210 wb_used_before = ctx.workbuf_used;
211 TEST_SUCC(vb2api_init_hash2(&ctx, test_guid, &size),
212 "init hash good");
213 TEST_EQ(sd->workbuf_hash_offset,
214 (wb_used_before + (VB2_WORKBUF_ALIGN - 1)) &
215 ~(VB2_WORKBUF_ALIGN - 1),
216 "hash context offset");
217 TEST_EQ(sd->workbuf_hash_size, sizeof(struct vb2_digest_context),
218 "hash context size");
219 TEST_EQ(ctx.workbuf_used,
220 sd->workbuf_hash_offset + sd->workbuf_hash_size,
221 "hash uses workbuf");
222 TEST_EQ(sd->hash_tag,
223 sd->workbuf_preamble_offset + pre->hash_offset,
224 "hash signature offset");
225 TEST_EQ(sd->hash_remaining_size, mock_body_size, "hash remaining");
226
227 wb_used_before = ctx.workbuf_used;
228 TEST_SUCC(vb2api_init_hash2(&ctx, test_guid + 2, NULL),
229 "init hash again");
230 TEST_EQ(ctx.workbuf_used, wb_used_before, "init hash reuses context");
231 TEST_EQ(sd->hash_tag,
232 sd->workbuf_preamble_offset + pre->hash_offset +
233 2 * mock_sig_size,
234 "hash signature offset 2");
235
236 reset_common_data(FOR_MISC);
237 TEST_EQ(vb2api_init_hash2(&ctx, test_guid + 3, &size),
238 VB2_ERROR_API_INIT_HASH_GUID, "init hash invalid guid");
239
240 reset_common_data(FOR_MISC);
241 sd->workbuf_preamble_size = 0;
242 TEST_EQ(vb2api_init_hash2(&ctx, test_guid, &size),
243 VB2_ERROR_API_INIT_HASH_PREAMBLE, "init hash preamble");
244
245 reset_common_data(FOR_MISC);
246 ctx.workbuf_used =
247 ctx.workbuf_size - sizeof(struct vb2_digest_context) + 8;
248 TEST_EQ(vb2api_init_hash2(&ctx, test_guid, &size),
249 VB2_ERROR_API_INIT_HASH_WORKBUF, "init hash workbuf");
250
251 reset_common_data(FOR_MISC);
252 sig->hash_alg = VB2_HASH_INVALID;
253 TEST_EQ(vb2api_init_hash2(&ctx, test_guid, &size),
254 VB2_ERROR_SHA_INIT_ALGORITHM, "init hash algorithm");
255
256 if (hwcrypto_state == HWCRYPTO_ENABLED) {
257 reset_common_data(FOR_MISC);
258 retval_hwcrypto = VB2_ERROR_MOCK;
259 TEST_EQ(vb2api_init_hash2(&ctx, test_guid, &size),
260 VB2_ERROR_MOCK, "init hash use hwcrypto");
261 }
262 }
263
extend_hash_tests(void)264 static void extend_hash_tests(void)
265 {
266 struct vb2_digest_context *dc;
267
268 reset_common_data(FOR_EXTEND_HASH);
269 TEST_SUCC(vb2api_extend_hash(&ctx, mock_body, 32),
270 "hash extend good");
271 TEST_EQ(sd->hash_remaining_size, mock_body_size - 32,
272 "hash extend remaining");
273 TEST_SUCC(vb2api_extend_hash(&ctx, mock_body, mock_body_size - 32),
274 "hash extend again");
275 TEST_EQ(sd->hash_remaining_size, 0, "hash extend remaining 2");
276
277 reset_common_data(FOR_EXTEND_HASH);
278 sd->workbuf_hash_size = 0;
279 TEST_EQ(vb2api_extend_hash(&ctx, mock_body, mock_body_size),
280 VB2_ERROR_API_EXTEND_HASH_WORKBUF, "hash extend no workbuf");
281
282 reset_common_data(FOR_EXTEND_HASH);
283 TEST_EQ(vb2api_extend_hash(&ctx, mock_body, mock_body_size + 1),
284 VB2_ERROR_API_EXTEND_HASH_SIZE, "hash extend too much");
285
286 reset_common_data(FOR_EXTEND_HASH);
287 TEST_EQ(vb2api_extend_hash(&ctx, mock_body, 0),
288 VB2_ERROR_API_EXTEND_HASH_SIZE, "hash extend empty");
289
290 if (hwcrypto_state == HWCRYPTO_ENABLED) {
291 reset_common_data(FOR_EXTEND_HASH);
292 retval_hwcrypto = VB2_ERROR_MOCK;
293 TEST_EQ(vb2api_extend_hash(&ctx, mock_body, mock_body_size),
294 VB2_ERROR_MOCK, "hash extend use hwcrypto");
295 } else {
296 reset_common_data(FOR_EXTEND_HASH);
297 dc = (struct vb2_digest_context *)
298 (ctx.workbuf + sd->workbuf_hash_offset);
299 dc->hash_alg = VB2_HASH_INVALID;
300 TEST_EQ(vb2api_extend_hash(&ctx, mock_body, mock_body_size),
301 VB2_ERROR_SHA_EXTEND_ALGORITHM, "hash extend fail");
302 }
303 }
304
check_hash_tests(void)305 static void check_hash_tests(void)
306 {
307 struct vb2_fw_preamble *pre;
308 struct vb2_signature *sig;
309 struct vb2_digest_context *dc;
310
311 reset_common_data(FOR_CHECK_HASH);
312 pre = (struct vb2_fw_preamble *)
313 (ctx.workbuf + sd->workbuf_preamble_offset);
314 sig = (struct vb2_signature *)((uint8_t *)pre + pre->hash_offset);
315 dc = (struct vb2_digest_context *)
316 (ctx.workbuf + sd->workbuf_hash_offset);
317
318 TEST_SUCC(vb2api_check_hash(&ctx), "check hash good");
319
320 reset_common_data(FOR_CHECK_HASH);
321 sd->hash_tag = 0;
322 TEST_EQ(vb2api_check_hash(&ctx),
323 VB2_ERROR_API_CHECK_HASH_TAG, "check hash tag");
324
325 reset_common_data(FOR_CHECK_HASH);
326 sd->workbuf_hash_size = 0;
327 TEST_EQ(vb2api_check_hash(&ctx),
328 VB2_ERROR_API_CHECK_HASH_WORKBUF, "check hash no workbuf");
329
330 reset_common_data(FOR_CHECK_HASH);
331 sd->hash_remaining_size = 1;
332 TEST_EQ(vb2api_check_hash(&ctx),
333 VB2_ERROR_API_CHECK_HASH_SIZE, "check hash size");
334
335 reset_common_data(FOR_CHECK_HASH);
336 ctx.workbuf_used = ctx.workbuf_size;
337 TEST_EQ(vb2api_check_hash(&ctx),
338 VB2_ERROR_API_CHECK_HASH_WORKBUF_DIGEST, "check hash workbuf");
339
340 reset_common_data(FOR_CHECK_HASH);
341 *((uint8_t *)sig + sig->sig_offset) ^= 0x55;
342 TEST_EQ(vb2api_check_hash(&ctx),
343 VB2_ERROR_API_CHECK_HASH_SIG, "check hash sig");
344
345 if (hwcrypto_state == HWCRYPTO_ENABLED) {
346 reset_common_data(FOR_CHECK_HASH);
347 retval_hwcrypto = VB2_ERROR_MOCK;
348 TEST_EQ(vb2api_check_hash(&ctx),
349 VB2_ERROR_MOCK, "check hash use hwcrypto");
350 } else {
351 reset_common_data(FOR_CHECK_HASH);
352 dc->hash_alg = VB2_HASH_INVALID;
353 *((uint8_t *)sig + sig->sig_offset) ^= 0x55;
354 TEST_EQ(vb2api_check_hash(&ctx),
355 VB2_ERROR_SHA_FINALIZE_ALGORITHM, "check hash finaliz");
356 }
357 }
358
main(int argc,char * argv[])359 int main(int argc, char* argv[])
360 {
361 phase3_tests();
362
363 fprintf(stderr, "Running hash API tests without hwcrypto support...\n");
364 hwcrypto_state = HWCRYPTO_DISABLED;
365 init_hash_tests();
366 extend_hash_tests();
367 check_hash_tests();
368
369 fprintf(stderr, "Running hash API tests with hwcrypto support...\n");
370 hwcrypto_state = HWCRYPTO_ENABLED;
371 init_hash_tests();
372 extend_hash_tests();
373 check_hash_tests();
374
375 fprintf(stderr, "Running hash API tests with forbidden hwcrypto...\n");
376 hwcrypto_state = HWCRYPTO_FORBIDDEN;
377 init_hash_tests();
378 extend_hash_tests();
379 check_hash_tests();
380
381 return gTestSuccess ? 0 : 255;
382 }
383