Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 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 misc library |
| 6 | */ |
| 7 | |
| 8 | #include <stdio.h> |
| 9 | |
| 10 | #include "2sysincludes.h" |
| 11 | #include "2api.h" |
| 12 | #include "2misc.h" |
| 13 | #include "2nvstorage.h" |
| 14 | #include "2rsa.h" |
| 15 | #include "2secdata.h" |
| 16 | #include "vb2_common.h" |
| 17 | #include "test_common.h" |
| 18 | |
| 19 | /* Common context for tests */ |
| 20 | static uint8_t workbuf[VB2_WORKBUF_RECOMMENDED_SIZE] |
Bill Richardson | 73e5eb3 | 2015-01-26 12:18:25 -0800 | [diff] [blame] | 21 | __attribute__ ((aligned (VB2_WORKBUF_ALIGN))); |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 22 | static struct vb2_context cc; |
| 23 | static struct vb2_shared_data *sd; |
| 24 | |
| 25 | const char mock_body[320] = "Mock body"; |
| 26 | const int mock_body_size = sizeof(mock_body); |
| 27 | const int mock_algorithm = VB2_ALG_RSA2048_SHA256; |
| 28 | const int mock_hash_alg = VB2_HASH_SHA256; |
| 29 | const int mock_sig_size = 64; |
| 30 | |
| 31 | /* Mocked function data */ |
| 32 | |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 33 | static enum { |
| 34 | HWCRYPTO_DISABLED, |
| 35 | HWCRYPTO_ENABLED, |
| 36 | HWCRYPTO_FORBIDDEN, |
| 37 | } hwcrypto_state; |
| 38 | |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 39 | static int retval_vb2_load_fw_keyblock; |
| 40 | static int retval_vb2_load_fw_preamble; |
| 41 | static int retval_vb2_digest_finalize; |
| 42 | static int retval_vb2_verify_digest; |
| 43 | |
| 44 | /* Type of test to reset for */ |
| 45 | enum reset_type { |
| 46 | FOR_MISC, |
| 47 | FOR_EXTEND_HASH, |
| 48 | FOR_CHECK_HASH, |
| 49 | }; |
| 50 | |
| 51 | static void reset_common_data(enum reset_type t) |
| 52 | { |
| 53 | struct vb2_fw_preamble *pre; |
| 54 | struct vb2_packed_key *k; |
| 55 | |
| 56 | memset(workbuf, 0xaa, sizeof(workbuf)); |
| 57 | |
| 58 | memset(&cc, 0, sizeof(cc)); |
| 59 | cc.workbuf = workbuf; |
| 60 | cc.workbuf_size = sizeof(workbuf); |
| 61 | |
| 62 | vb2_init_context(&cc); |
| 63 | sd = vb2_get_sd(&cc); |
| 64 | |
| 65 | vb2_nv_init(&cc); |
| 66 | |
| 67 | vb2_secdata_create(&cc); |
| 68 | vb2_secdata_init(&cc); |
| 69 | |
| 70 | retval_vb2_load_fw_keyblock = VB2_SUCCESS; |
| 71 | retval_vb2_load_fw_preamble = VB2_SUCCESS; |
| 72 | retval_vb2_digest_finalize = VB2_SUCCESS; |
| 73 | retval_vb2_verify_digest = VB2_SUCCESS; |
| 74 | |
| 75 | sd->workbuf_preamble_offset = cc.workbuf_used; |
| 76 | sd->workbuf_preamble_size = sizeof(*pre); |
| 77 | cc.workbuf_used = sd->workbuf_preamble_offset |
| 78 | + sd->workbuf_preamble_size; |
| 79 | pre = (struct vb2_fw_preamble *) |
| 80 | (cc.workbuf + sd->workbuf_preamble_offset); |
| 81 | pre->body_signature.data_size = mock_body_size; |
| 82 | pre->body_signature.sig_size = mock_sig_size; |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 83 | if (hwcrypto_state == HWCRYPTO_FORBIDDEN) |
| 84 | pre->flags = VB2_FIRMWARE_PREAMBLE_DISALLOW_HWCRYPTO; |
| 85 | else |
| 86 | pre->flags = 0; |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 87 | |
| 88 | sd->workbuf_data_key_offset = cc.workbuf_used; |
| 89 | sd->workbuf_data_key_size = sizeof(*k) + 8; |
| 90 | cc.workbuf_used = sd->workbuf_data_key_offset + |
| 91 | sd->workbuf_data_key_size; |
| 92 | k = (struct vb2_packed_key *) |
| 93 | (cc.workbuf + sd->workbuf_data_key_offset); |
| 94 | k->algorithm = mock_algorithm; |
| 95 | |
| 96 | if (t == FOR_EXTEND_HASH || t == FOR_CHECK_HASH) |
| 97 | vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, NULL); |
| 98 | |
| 99 | if (t == FOR_CHECK_HASH) |
| 100 | vb2api_extend_hash(&cc, mock_body, mock_body_size); |
| 101 | }; |
| 102 | |
| 103 | /* Mocked functions */ |
| 104 | |
| 105 | int vb2_load_fw_keyblock(struct vb2_context *ctx) |
| 106 | { |
| 107 | return retval_vb2_load_fw_keyblock; |
| 108 | } |
| 109 | |
| 110 | int vb2_load_fw_preamble(struct vb2_context *ctx) |
| 111 | { |
| 112 | return retval_vb2_load_fw_preamble; |
| 113 | } |
| 114 | |
| 115 | int vb2_unpack_key(struct vb2_public_key *key, |
| 116 | const uint8_t *buf, |
| 117 | uint32_t size) |
| 118 | { |
| 119 | struct vb2_packed_key *k = (struct vb2_packed_key *)buf; |
| 120 | |
| 121 | if (size != sizeof(*k) + 8) |
| 122 | return VB2_ERROR_UNPACK_KEY_SIZE; |
| 123 | |
| 124 | key->sig_alg = vb2_crypto_to_signature(k->algorithm); |
| 125 | key->hash_alg = vb2_crypto_to_hash(k->algorithm); |
| 126 | |
| 127 | return VB2_SUCCESS; |
| 128 | } |
| 129 | |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 130 | int vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg, |
| 131 | uint32_t data_size) |
| 132 | { |
| 133 | switch (hwcrypto_state) { |
| 134 | case HWCRYPTO_DISABLED: |
| 135 | return VB2_ERROR_EX_HWCRYPTO_UNSUPPORTED; |
| 136 | case HWCRYPTO_ENABLED: |
| 137 | if (hash_alg != mock_hash_alg) |
| 138 | return VB2_ERROR_SHA_INIT_ALGORITHM; |
| 139 | else |
| 140 | return VB2_SUCCESS; |
| 141 | case HWCRYPTO_FORBIDDEN: |
| 142 | default: |
| 143 | return VB2_ERROR_UNKNOWN; |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | int vb2ex_hwcrypto_digest_extend(const uint8_t *buf, |
| 148 | uint32_t size) |
| 149 | { |
| 150 | if (hwcrypto_state != HWCRYPTO_ENABLED) |
| 151 | return VB2_ERROR_UNKNOWN; |
| 152 | |
| 153 | return VB2_SUCCESS; |
| 154 | } |
| 155 | |
| 156 | int vb2ex_hwcrypto_digest_finalize(uint8_t *digest, |
| 157 | uint32_t digest_size) |
| 158 | { |
| 159 | if (hwcrypto_state != HWCRYPTO_ENABLED) |
| 160 | return VB2_ERROR_UNKNOWN; |
| 161 | |
| 162 | return retval_vb2_digest_finalize; |
| 163 | } |
| 164 | |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 165 | int vb2_digest_init(struct vb2_digest_context *dc, |
| 166 | enum vb2_hash_algorithm hash_alg) |
| 167 | { |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 168 | if (hwcrypto_state == HWCRYPTO_ENABLED) |
| 169 | return VB2_ERROR_UNKNOWN; |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 170 | if (hash_alg != mock_hash_alg) |
| 171 | return VB2_ERROR_SHA_INIT_ALGORITHM; |
| 172 | |
| 173 | dc->hash_alg = hash_alg; |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 174 | dc->using_hwcrypto = 0; |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 175 | |
| 176 | return VB2_SUCCESS; |
| 177 | } |
| 178 | |
| 179 | int vb2_digest_extend(struct vb2_digest_context *dc, |
| 180 | const uint8_t *buf, |
| 181 | uint32_t size) |
| 182 | { |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 183 | if (hwcrypto_state == HWCRYPTO_ENABLED) |
| 184 | return VB2_ERROR_UNKNOWN; |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 185 | if (dc->hash_alg != mock_hash_alg) |
| 186 | return VB2_ERROR_SHA_EXTEND_ALGORITHM; |
| 187 | |
| 188 | return VB2_SUCCESS; |
| 189 | } |
| 190 | |
| 191 | int vb2_digest_finalize(struct vb2_digest_context *dc, |
| 192 | uint8_t *digest, |
| 193 | uint32_t digest_size) |
| 194 | { |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 195 | if (hwcrypto_state == HWCRYPTO_ENABLED) |
| 196 | return VB2_ERROR_UNKNOWN; |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 197 | return retval_vb2_digest_finalize; |
| 198 | } |
| 199 | |
| 200 | uint32_t vb2_rsa_sig_size(enum vb2_signature_algorithm sig_alg) |
| 201 | { |
| 202 | return mock_sig_size; |
| 203 | } |
| 204 | |
| 205 | int vb2_rsa_verify_digest(const struct vb2_public_key *key, |
| 206 | uint8_t *sig, |
| 207 | const uint8_t *digest, |
| 208 | const struct vb2_workbuf *wb) |
| 209 | { |
| 210 | return retval_vb2_verify_digest; |
| 211 | } |
| 212 | |
| 213 | /* Tests */ |
| 214 | |
| 215 | static void phase3_tests(void) |
| 216 | { |
| 217 | reset_common_data(FOR_MISC); |
| 218 | TEST_SUCC(vb2api_fw_phase3(&cc), "phase3 good"); |
| 219 | |
| 220 | reset_common_data(FOR_MISC); |
| 221 | retval_vb2_load_fw_keyblock = VB2_ERROR_MOCK; |
| 222 | TEST_EQ(vb2api_fw_phase3(&cc), VB2_ERROR_MOCK, "phase3 keyblock"); |
| 223 | TEST_EQ(vb2_nv_get(&cc, VB2_NV_RECOVERY_REQUEST), |
| 224 | VB2_RECOVERY_RO_INVALID_RW, " recovery reason"); |
| 225 | |
| 226 | reset_common_data(FOR_MISC); |
| 227 | retval_vb2_load_fw_preamble = VB2_ERROR_MOCK; |
| 228 | TEST_EQ(vb2api_fw_phase3(&cc), VB2_ERROR_MOCK, "phase3 keyblock"); |
| 229 | TEST_EQ(vb2_nv_get(&cc, VB2_NV_RECOVERY_REQUEST), |
| 230 | VB2_RECOVERY_RO_INVALID_RW, " recovery reason"); |
| 231 | } |
| 232 | |
| 233 | static void init_hash_tests(void) |
| 234 | { |
| 235 | struct vb2_packed_key *k; |
| 236 | int wb_used_before; |
| 237 | uint32_t size; |
| 238 | |
| 239 | /* For now, all we support is body signature hash */ |
| 240 | reset_common_data(FOR_MISC); |
| 241 | wb_used_before = cc.workbuf_used; |
| 242 | TEST_SUCC(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size), |
| 243 | "init hash good"); |
| 244 | TEST_EQ(sd->workbuf_hash_offset, |
| 245 | (wb_used_before + (VB2_WORKBUF_ALIGN - 1)) & |
| 246 | ~(VB2_WORKBUF_ALIGN - 1), |
| 247 | "hash context offset"); |
| 248 | TEST_EQ(sd->workbuf_hash_size, sizeof(struct vb2_digest_context), |
| 249 | "hash context size"); |
| 250 | TEST_EQ(cc.workbuf_used, |
| 251 | sd->workbuf_hash_offset + sd->workbuf_hash_size, |
| 252 | "hash uses workbuf"); |
| 253 | TEST_EQ(sd->hash_tag, VB2_HASH_TAG_FW_BODY, "hash tag"); |
| 254 | TEST_EQ(sd->hash_remaining_size, mock_body_size, "hash remaining"); |
| 255 | |
| 256 | wb_used_before = cc.workbuf_used; |
| 257 | TEST_SUCC(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, NULL), |
| 258 | "init hash again"); |
| 259 | TEST_EQ(cc.workbuf_used, wb_used_before, "init hash reuses context"); |
| 260 | |
| 261 | reset_common_data(FOR_MISC); |
| 262 | TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_INVALID, &size), |
| 263 | VB2_ERROR_API_INIT_HASH_TAG, "init hash invalid tag"); |
| 264 | |
| 265 | reset_common_data(FOR_MISC); |
| 266 | sd->workbuf_preamble_size = 0; |
| 267 | TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size), |
| 268 | VB2_ERROR_API_INIT_HASH_PREAMBLE, "init hash preamble"); |
| 269 | |
| 270 | reset_common_data(FOR_MISC); |
| 271 | TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY + 1, &size), |
| 272 | VB2_ERROR_API_INIT_HASH_TAG, "init hash unknown tag"); |
| 273 | |
| 274 | reset_common_data(FOR_MISC); |
| 275 | cc.workbuf_used = |
| 276 | cc.workbuf_size - sizeof(struct vb2_digest_context) + 8; |
| 277 | TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size), |
| 278 | VB2_ERROR_API_INIT_HASH_WORKBUF, "init hash workbuf"); |
| 279 | |
| 280 | reset_common_data(FOR_MISC); |
| 281 | sd->workbuf_data_key_size = 0; |
| 282 | TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size), |
| 283 | VB2_ERROR_API_INIT_HASH_DATA_KEY, "init hash data key"); |
| 284 | |
| 285 | reset_common_data(FOR_MISC); |
| 286 | sd->workbuf_data_key_size--; |
| 287 | TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size), |
| 288 | VB2_ERROR_UNPACK_KEY_SIZE, "init hash data key size"); |
| 289 | |
| 290 | reset_common_data(FOR_MISC); |
| 291 | k = (struct vb2_packed_key *)(cc.workbuf + sd->workbuf_data_key_offset); |
| 292 | k->algorithm--; |
| 293 | TEST_EQ(vb2api_init_hash(&cc, VB2_HASH_TAG_FW_BODY, &size), |
| 294 | VB2_ERROR_SHA_INIT_ALGORITHM, "init hash algorithm"); |
| 295 | } |
| 296 | |
| 297 | static void extend_hash_tests(void) |
| 298 | { |
| 299 | struct vb2_digest_context *dc; |
| 300 | |
| 301 | reset_common_data(FOR_EXTEND_HASH); |
| 302 | TEST_SUCC(vb2api_extend_hash(&cc, mock_body, 32), |
| 303 | "hash extend good"); |
| 304 | TEST_EQ(sd->hash_remaining_size, mock_body_size - 32, |
| 305 | "hash extend remaining"); |
| 306 | TEST_SUCC(vb2api_extend_hash(&cc, mock_body, mock_body_size - 32), |
| 307 | "hash extend again"); |
| 308 | TEST_EQ(sd->hash_remaining_size, 0, "hash extend remaining 2"); |
| 309 | |
| 310 | reset_common_data(FOR_EXTEND_HASH); |
| 311 | sd->workbuf_hash_size = 0; |
| 312 | TEST_EQ(vb2api_extend_hash(&cc, mock_body, mock_body_size), |
| 313 | VB2_ERROR_API_EXTEND_HASH_WORKBUF, "hash extend no workbuf"); |
| 314 | |
| 315 | reset_common_data(FOR_EXTEND_HASH); |
| 316 | TEST_EQ(vb2api_extend_hash(&cc, mock_body, mock_body_size + 1), |
| 317 | VB2_ERROR_API_EXTEND_HASH_SIZE, "hash extend too much"); |
| 318 | |
| 319 | reset_common_data(FOR_EXTEND_HASH); |
| 320 | TEST_EQ(vb2api_extend_hash(&cc, mock_body, 0), |
| 321 | VB2_ERROR_API_EXTEND_HASH_SIZE, "hash extend empty"); |
| 322 | |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 323 | if (hwcrypto_state != HWCRYPTO_ENABLED) { |
| 324 | reset_common_data(FOR_EXTEND_HASH); |
| 325 | dc = (struct vb2_digest_context *) |
| 326 | (cc.workbuf + sd->workbuf_hash_offset); |
| 327 | dc->hash_alg = mock_hash_alg + 1; |
| 328 | TEST_EQ(vb2api_extend_hash(&cc, mock_body, mock_body_size), |
| 329 | VB2_ERROR_SHA_EXTEND_ALGORITHM, "hash extend fail"); |
| 330 | } |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | static void check_hash_tests(void) |
| 334 | { |
| 335 | struct vb2_fw_preamble *pre; |
| 336 | |
| 337 | reset_common_data(FOR_CHECK_HASH); |
| 338 | TEST_SUCC(vb2api_check_hash(&cc), "check hash good"); |
| 339 | |
| 340 | reset_common_data(FOR_CHECK_HASH); |
| 341 | sd->workbuf_preamble_size = 0; |
| 342 | TEST_EQ(vb2api_check_hash(&cc), |
| 343 | VB2_ERROR_API_CHECK_HASH_PREAMBLE, "check hash preamble"); |
| 344 | |
| 345 | reset_common_data(FOR_CHECK_HASH); |
| 346 | sd->workbuf_hash_size = 0; |
| 347 | TEST_EQ(vb2api_check_hash(&cc), |
| 348 | VB2_ERROR_API_CHECK_HASH_WORKBUF, "check hash no workbuf"); |
| 349 | |
| 350 | reset_common_data(FOR_CHECK_HASH); |
| 351 | sd->hash_remaining_size = 1; |
| 352 | TEST_EQ(vb2api_check_hash(&cc), |
| 353 | VB2_ERROR_API_CHECK_HASH_SIZE, "check hash size"); |
| 354 | |
| 355 | reset_common_data(FOR_CHECK_HASH); |
| 356 | cc.workbuf_used = cc.workbuf_size; |
| 357 | TEST_EQ(vb2api_check_hash(&cc), |
| 358 | VB2_ERROR_API_CHECK_HASH_WORKBUF_DIGEST, "check hash workbuf"); |
| 359 | |
| 360 | reset_common_data(FOR_CHECK_HASH); |
| 361 | retval_vb2_digest_finalize = VB2_ERROR_MOCK; |
| 362 | TEST_EQ(vb2api_check_hash(&cc), VB2_ERROR_MOCK, "check hash finalize"); |
| 363 | |
| 364 | reset_common_data(FOR_CHECK_HASH); |
| 365 | sd->hash_tag = VB2_HASH_TAG_INVALID; |
| 366 | TEST_EQ(vb2api_check_hash(&cc), |
| 367 | VB2_ERROR_API_CHECK_HASH_TAG, "check hash tag"); |
| 368 | |
| 369 | reset_common_data(FOR_CHECK_HASH); |
| 370 | sd->workbuf_data_key_size = 0; |
| 371 | TEST_EQ(vb2api_check_hash(&cc), |
| 372 | VB2_ERROR_API_CHECK_HASH_DATA_KEY, "check hash data key"); |
| 373 | |
| 374 | reset_common_data(FOR_CHECK_HASH); |
| 375 | sd->workbuf_data_key_size--; |
| 376 | TEST_EQ(vb2api_check_hash(&cc), |
| 377 | VB2_ERROR_UNPACK_KEY_SIZE, "check hash data key size"); |
| 378 | |
| 379 | reset_common_data(FOR_CHECK_HASH); |
| 380 | pre = (struct vb2_fw_preamble *) |
| 381 | (cc.workbuf + sd->workbuf_preamble_offset); |
| 382 | pre->body_signature.sig_size++; |
| 383 | TEST_EQ(vb2api_check_hash(&cc), |
| 384 | VB2_ERROR_VDATA_SIG_SIZE, "check hash sig size"); |
| 385 | |
| 386 | reset_common_data(FOR_CHECK_HASH); |
| 387 | retval_vb2_digest_finalize = VB2_ERROR_RSA_VERIFY_DIGEST; |
| 388 | TEST_EQ(vb2api_check_hash(&cc), |
| 389 | VB2_ERROR_RSA_VERIFY_DIGEST, "check hash finalize"); |
| 390 | } |
| 391 | |
| 392 | int main(int argc, char* argv[]) |
| 393 | { |
| 394 | phase3_tests(); |
Julius Werner | f10e909 | 2014-12-16 19:24:54 -0800 | [diff] [blame] | 395 | |
| 396 | fprintf(stderr, "Running hash API tests without hwcrypto support...\n"); |
| 397 | hwcrypto_state = HWCRYPTO_DISABLED; |
| 398 | init_hash_tests(); |
| 399 | extend_hash_tests(); |
| 400 | check_hash_tests(); |
| 401 | |
| 402 | fprintf(stderr, "Running hash API tests with hwcrypto support...\n"); |
| 403 | hwcrypto_state = HWCRYPTO_ENABLED; |
| 404 | init_hash_tests(); |
| 405 | extend_hash_tests(); |
| 406 | check_hash_tests(); |
| 407 | |
| 408 | fprintf(stderr, "Running hash API tests with forbidden hwcrypto...\n"); |
| 409 | hwcrypto_state = HWCRYPTO_FORBIDDEN; |
Randall Spangler | 6f1b82a | 2014-12-03 12:29:37 -0800 | [diff] [blame] | 410 | init_hash_tests(); |
| 411 | extend_hash_tests(); |
| 412 | check_hash_tests(); |
| 413 | |
| 414 | return gTestSuccess ? 0 : 255; |
| 415 | } |