| 1 | /* |
| 2 | * EIF (Enclave Image Format) related helpers |
| 3 | * |
| 4 | * Copyright (c) 2024 Dorjoy Chowdhury <dorjoychy111@gmail.com> |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU GPL, version 2 or |
| 7 | * (at your option) any later version. See the COPYING file in the |
| 8 | * top-level directory. |
| 9 | */ |
| 10 | |
| 11 | #include "qemu/osdep.h" |
| 12 | #include "qemu/bswap.h" |
| 13 | #include "qapi/error.h" |
| 14 | #include "crypto/hash.h" |
| 15 | #include "crypto/x509-utils.h" |
| 16 | #include <zlib.h> /* for crc32 */ |
| 17 | #include <cbor.h> |
| 18 | |
| 19 | #include "hw/core/eif.h" |
| 20 | |
| 21 | static const char *section_type_to_string(uint16_t type) |
| 22 | { |
| 23 | const char *str; |
| 24 | switch (type) { |
| 25 | case EIF_SECTION_INVALID: |
| 26 | str = "invalid"; |
| 27 | break; |
| 28 | case EIF_SECTION_KERNEL: |
| 29 | str = "kernel"; |
| 30 | break; |
| 31 | case EIF_SECTION_CMDLINE: |
| 32 | str = "cmdline"; |
| 33 | break; |
| 34 | case EIF_SECTION_RAMDISK: |
| 35 | str = "ramdisk"; |
| 36 | break; |
| 37 | case EIF_SECTION_SIGNATURE: |
| 38 | str = "signature"; |
| 39 | break; |
| 40 | case EIF_SECTION_METADATA: |
| 41 | str = "metadata"; |
| 42 | break; |
| 43 | default: |
| 44 | str = "unknown"; |
| 45 | break; |
| 46 | } |
| 47 | |
| 48 | return str; |
| 49 | } |
| 50 | |
| 51 | static bool read_eif_header(FILE *f, EifHeader *header, uint32_t *crc, |
| 52 | Error **errp) |
| 53 | { |
| 54 | size_t got; |
| 55 | size_t header_size = sizeof(*header); |
| 56 | |
| 57 | got = fread(header, 1, header_size, f); |
| 58 | if (got != header_size) { |
| 59 | error_setg(errp, "Failed to read EIF header"); |
| 60 | return false; |
| 61 | } |
| 62 | |
| 63 | if (memcmp(header->magic, ".eif", 4) != 0) { |
| 64 | error_setg(errp, "Invalid EIF image. Magic mismatch."); |
| 65 | return false; |
| 66 | } |
| 67 | |
| 68 | /* Exclude header->eif_crc32 field from CRC calculation */ |
| 69 | *crc = crc32(*crc, (uint8_t *)header, header_size - 4); |
| 70 | |
| 71 | header->version = be16_to_cpu(header->version); |
| 72 | header->flags = be16_to_cpu(header->flags); |
| 73 | header->default_memory = be64_to_cpu(header->default_memory); |
| 74 | header->default_cpus = be64_to_cpu(header->default_cpus); |
| 75 | header->reserved = be16_to_cpu(header->reserved); |
| 76 | header->section_cnt = be16_to_cpu(header->section_cnt); |
| 77 | |
| 78 | for (int i = 0; i < MAX_SECTIONS; ++i) { |
| 79 | header->section_offsets[i] = be64_to_cpu(header->section_offsets[i]); |
| 80 | } |
| 81 | |
| 82 | for (int i = 0; i < MAX_SECTIONS; ++i) { |
| 83 | header->section_sizes[i] = be64_to_cpu(header->section_sizes[i]); |
| 84 | if (header->section_sizes[i] > SSIZE_MAX) { |
| 85 | error_setg(errp, "Invalid EIF image. Section size out of bounds"); |
| 86 | return false; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | header->unused = be32_to_cpu(header->unused); |
| 91 | header->eif_crc32 = be32_to_cpu(header->eif_crc32); |
| 92 | return true; |
| 93 | } |
| 94 | |
| 95 | static bool read_eif_section_header(FILE *f, EifSectionHeader *section_header, |
| 96 | uint32_t *crc, Error **errp) |
| 97 | { |
| 98 | size_t got; |
| 99 | size_t section_header_size = sizeof(*section_header); |
| 100 | |
| 101 | got = fread(section_header, 1, section_header_size, f); |
| 102 | if (got != section_header_size) { |
| 103 | error_setg(errp, "Failed to read EIF section header"); |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | *crc = crc32(*crc, (uint8_t *)section_header, section_header_size); |
| 108 | |
| 109 | section_header->section_type = be16_to_cpu(section_header->section_type); |
| 110 | section_header->flags = be16_to_cpu(section_header->flags); |
| 111 | section_header->section_size = be64_to_cpu(section_header->section_size); |
| 112 | return true; |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * Upon success, the caller is responsible for unlinking and freeing *tmp_path. |
| 117 | */ |
| 118 | static bool get_tmp_file(const char *template, char **tmp_path, Error **errp) |
| 119 | { |
| 120 | int tmp_fd; |
| 121 | |
| 122 | *tmp_path = NULL; |
| 123 | tmp_fd = g_file_open_tmp(template, tmp_path, NULL); |
| 124 | if (tmp_fd < 0 || *tmp_path == NULL) { |
| 125 | error_setg(errp, "Failed to create temporary file for template %s", |
| 126 | template); |
| 127 | return false; |
| 128 | } |
| 129 | |
| 130 | close(tmp_fd); |
| 131 | return true; |
| 132 | } |
| 133 | |
| 134 | static void safe_fclose(FILE *f) |
| 135 | { |
| 136 | if (f) { |
| 137 | fclose(f); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static void safe_unlink(char *f) |
| 142 | { |
| 143 | if (f) { |
| 144 | unlink(f); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * Upon success, the caller is reponsible for unlinking and freeing *kernel_path |
| 150 | */ |
| 151 | static bool read_eif_kernel(FILE *f, uint64_t size, char **kernel_path, |
| 152 | QCryptoHash *hash0, QCryptoHash *hash1, |
| 153 | uint32_t *crc, Error **errp) |
| 154 | { |
| 155 | size_t got; |
| 156 | FILE *tmp_file = NULL; |
| 157 | uint8_t *kernel = g_try_malloc(size); |
| 158 | if (!kernel) { |
| 159 | error_setg(errp, "Out of memory reading kernel section"); |
| 160 | goto cleanup; |
| 161 | } |
| 162 | |
| 163 | *kernel_path = NULL; |
| 164 | if (!get_tmp_file("eif-kernel-XXXXXX", kernel_path, errp)) { |
| 165 | goto cleanup; |
| 166 | } |
| 167 | |
| 168 | tmp_file = fopen(*kernel_path, "wb"); |
| 169 | if (tmp_file == NULL) { |
| 170 | error_setg_errno(errp, errno, "Failed to open temporary file %s", |
| 171 | *kernel_path); |
| 172 | goto cleanup; |
| 173 | } |
| 174 | |
| 175 | got = fread(kernel, 1, size, f); |
| 176 | if ((uint64_t) got != size) { |
| 177 | error_setg(errp, "Failed to read EIF kernel section data"); |
| 178 | goto cleanup; |
| 179 | } |
| 180 | |
| 181 | got = fwrite(kernel, 1, size, tmp_file); |
| 182 | if ((uint64_t) got != size) { |
| 183 | error_setg(errp, "Failed to write EIF kernel section data to temporary" |
| 184 | " file"); |
| 185 | goto cleanup; |
| 186 | } |
| 187 | |
| 188 | *crc = crc32(*crc, kernel, size); |
| 189 | if (qcrypto_hash_update(hash0, (char *)kernel, size, errp) != 0 || |
| 190 | qcrypto_hash_update(hash1, (char *)kernel, size, errp) != 0) { |
| 191 | goto cleanup; |
| 192 | } |
| 193 | g_free(kernel); |
| 194 | fclose(tmp_file); |
| 195 | |
| 196 | return true; |
| 197 | |
| 198 | cleanup: |
| 199 | safe_fclose(tmp_file); |
| 200 | |
| 201 | safe_unlink(*kernel_path); |
| 202 | g_free(*kernel_path); |
| 203 | *kernel_path = NULL; |
| 204 | |
| 205 | g_free(kernel); |
| 206 | return false; |
| 207 | } |
| 208 | |
| 209 | static bool read_eif_cmdline(FILE *f, uint64_t size, char *cmdline, |
| 210 | QCryptoHash *hash0, QCryptoHash *hash1, |
| 211 | uint32_t *crc, Error **errp) |
| 212 | { |
| 213 | size_t got = fread(cmdline, 1, size, f); |
| 214 | if ((uint64_t) got != size) { |
| 215 | error_setg(errp, "Failed to read EIF cmdline section data"); |
| 216 | return false; |
| 217 | } |
| 218 | |
| 219 | *crc = crc32(*crc, (uint8_t *)cmdline, size); |
| 220 | if (qcrypto_hash_update(hash0, cmdline, size, errp) != 0 || |
| 221 | qcrypto_hash_update(hash1, cmdline, size, errp) != 0) { |
| 222 | return false; |
| 223 | } |
| 224 | return true; |
| 225 | } |
| 226 | |
| 227 | static bool read_eif_ramdisk(FILE *eif, FILE *initrd, uint64_t size, |
| 228 | QCryptoHash *hash0, QCryptoHash *h, uint32_t *crc, |
| 229 | Error **errp) |
| 230 | { |
| 231 | size_t got; |
| 232 | bool ret = false; |
| 233 | uint8_t *ramdisk = g_try_malloc(size); |
| 234 | if (!ramdisk) { |
| 235 | error_setg(errp, "Out of memory reading initrd section"); |
| 236 | goto cleanup; |
| 237 | } |
| 238 | |
| 239 | got = fread(ramdisk, 1, size, eif); |
| 240 | if ((uint64_t) got != size) { |
| 241 | error_setg(errp, "Failed to read EIF ramdisk section data"); |
| 242 | goto cleanup; |
| 243 | } |
| 244 | |
| 245 | got = fwrite(ramdisk, 1, size, initrd); |
| 246 | if ((uint64_t) got != size) { |
| 247 | error_setg(errp, "Failed to write EIF ramdisk data to temporary file"); |
| 248 | goto cleanup; |
| 249 | } |
| 250 | |
| 251 | *crc = crc32(*crc, ramdisk, size); |
| 252 | if (qcrypto_hash_update(hash0, (char *)ramdisk, size, errp) != 0 || |
| 253 | qcrypto_hash_update(h, (char *)ramdisk, size, errp) != 0) { |
| 254 | goto cleanup; |
| 255 | } |
| 256 | ret = true; |
| 257 | |
| 258 | cleanup: |
| 259 | g_free(ramdisk); |
| 260 | return ret; |
| 261 | } |
| 262 | |
| 263 | static bool get_signature_fingerprint_sha384(FILE *eif, uint64_t size, |
| 264 | uint8_t *sha384, |
| 265 | uint32_t *crc, |
| 266 | Error **errp) |
| 267 | { |
| 268 | size_t got; |
| 269 | g_autofree uint8_t *sig = NULL; |
| 270 | g_autofree uint8_t *cert = NULL; |
| 271 | cbor_item_t *item = NULL; |
| 272 | cbor_item_t *pcr0 = NULL; |
| 273 | size_t len; |
| 274 | size_t hash_len = QCRYPTO_HASH_DIGEST_LEN_SHA384; |
| 275 | struct cbor_pair *pair; |
| 276 | struct cbor_load_result result; |
| 277 | bool ret = false; |
| 278 | |
| 279 | sig = g_try_malloc(size); |
| 280 | if (!sig) { |
| 281 | error_setg(errp, "Out of memory reading signature section"); |
| 282 | goto cleanup; |
| 283 | } |
| 284 | |
| 285 | got = fread(sig, 1, size, eif); |
| 286 | if ((uint64_t) got != size) { |
| 287 | error_setg(errp, "Failed to read EIF signature section data"); |
| 288 | goto cleanup; |
| 289 | } |
| 290 | |
| 291 | *crc = crc32(*crc, sig, size); |
| 292 | |
| 293 | item = cbor_load(sig, size, &result); |
| 294 | if (!item || result.error.code != CBOR_ERR_NONE) { |
| 295 | error_setg(errp, "Failed to load signature section data as CBOR"); |
| 296 | goto cleanup; |
| 297 | } |
| 298 | if (!cbor_isa_array(item) || cbor_array_size(item) < 1) { |
| 299 | error_setg(errp, "Invalid signature CBOR"); |
| 300 | goto cleanup; |
| 301 | } |
| 302 | pcr0 = cbor_array_get(item, 0); |
| 303 | if (!pcr0) { |
| 304 | error_setg(errp, "Failed to get PCR0 signature"); |
| 305 | goto cleanup; |
| 306 | } |
| 307 | if (!cbor_isa_map(pcr0) || cbor_map_size(pcr0) != 2) { |
| 308 | error_setg(errp, "Invalid signature CBOR"); |
| 309 | goto cleanup; |
| 310 | } |
| 311 | pair = cbor_map_handle(pcr0); |
| 312 | if (!cbor_isa_string(pair->key) || cbor_string_length(pair->key) != 19 || |
| 313 | memcmp(cbor_string_handle(pair->key), "signing_certificate", 19) != 0) { |
| 314 | error_setg(errp, "Invalid signautre CBOR"); |
| 315 | goto cleanup; |
| 316 | } |
| 317 | if (!cbor_isa_array(pair->value)) { |
| 318 | error_setg(errp, "Invalid signature CBOR"); |
| 319 | goto cleanup; |
| 320 | } |
| 321 | len = cbor_array_size(pair->value); |
| 322 | if (len == 0) { |
| 323 | error_setg(errp, "Invalid signature CBOR"); |
| 324 | goto cleanup; |
| 325 | } |
| 326 | cert = g_try_malloc(len); |
| 327 | if (!cert) { |
| 328 | error_setg(errp, "Out of memory reading signature section"); |
| 329 | goto cleanup; |
| 330 | } |
| 331 | |
| 332 | for (int i = 0; i < len; ++i) { |
| 333 | cbor_item_t *tmp = cbor_array_get(pair->value, i); |
| 334 | if (!tmp) { |
| 335 | error_setg(errp, "Invalid signature CBOR"); |
| 336 | goto cleanup; |
| 337 | } |
| 338 | if (!cbor_isa_uint(tmp) || cbor_int_get_width(tmp) != CBOR_INT_8) { |
| 339 | cbor_decref(&tmp); |
| 340 | error_setg(errp, "Invalid signature CBOR"); |
| 341 | goto cleanup; |
| 342 | } |
| 343 | cert[i] = cbor_get_uint8(tmp); |
| 344 | cbor_decref(&tmp); |
| 345 | } |
| 346 | |
| 347 | if (qcrypto_get_x509_cert_fingerprint(cert, len, QCRYPTO_HASH_ALGO_SHA384, |
| 348 | sha384, &hash_len, errp)) { |
| 349 | goto cleanup; |
| 350 | } |
| 351 | |
| 352 | ret = true; |
| 353 | |
| 354 | cleanup: |
| 355 | if (pcr0) { |
| 356 | cbor_decref(&pcr0); |
| 357 | } |
| 358 | if (item) { |
| 359 | cbor_decref(&item); |
| 360 | } |
| 361 | return ret; |
| 362 | } |
| 363 | |
| 364 | /* Expects file to have offset 0 before this function is called */ |
| 365 | static long get_file_size(FILE *f, Error **errp) |
| 366 | { |
| 367 | long size; |
| 368 | |
| 369 | if (fseek(f, 0, SEEK_END) != 0) { |
| 370 | error_setg_errno(errp, errno, "Failed to seek to the end of file"); |
| 371 | return -1; |
| 372 | } |
| 373 | |
| 374 | size = ftell(f); |
| 375 | if (size == -1) { |
| 376 | error_setg_errno(errp, errno, "Failed to get offset"); |
| 377 | return -1; |
| 378 | } |
| 379 | |
| 380 | if (fseek(f, 0, SEEK_SET) != 0) { |
| 381 | error_setg_errno(errp, errno, "Failed to seek back to the start"); |
| 382 | return -1; |
| 383 | } |
| 384 | |
| 385 | return size; |
| 386 | } |
| 387 | |
| 388 | static bool get_SHA384_hash(QCryptoHash *h, uint8_t *hash, Error **errp) |
| 389 | { |
| 390 | size_t hash_len = QCRYPTO_HASH_DIGEST_LEN_SHA384; |
| 391 | return qcrypto_hash_finalize_bytes(h, &hash, &hash_len, errp) == 0; |
| 392 | } |
| 393 | |
| 394 | /* |
| 395 | * Upon success, the caller is reponsible for unlinking and freeing |
| 396 | * *kernel_path, *initrd_path and freeing *cmdline. |
| 397 | */ |
| 398 | bool read_eif_file(const char *eif_path, const char *machine_initrd, |
| 399 | char **kernel_path, char **initrd_path, char **cmdline, |
| 400 | uint8_t *image_hash, uint8_t *bootstrap_hash, |
| 401 | uint8_t *app_hash, uint8_t *fingerprint_hash, |
| 402 | bool *signature_found, Error **errp) |
| 403 | { |
| 404 | FILE *f = NULL; |
| 405 | FILE *machine_initrd_f = NULL; |
| 406 | FILE *initrd_path_f = NULL; |
| 407 | long machine_initrd_size; |
| 408 | uint32_t crc = 0; |
| 409 | EifHeader eif_header; |
| 410 | bool seen_sections[EIF_SECTION_MAX] = {false}; |
| 411 | /* kernel + ramdisks + cmdline SHA384 hash */ |
| 412 | g_autoptr(QCryptoHash) hash0 = NULL; |
| 413 | /* kernel + boot ramdisk + cmdline SHA384 hash */ |
| 414 | g_autoptr(QCryptoHash) hash1 = NULL; |
| 415 | /* application ramdisk(s) SHA384 hash */ |
| 416 | g_autoptr(QCryptoHash) hash2 = NULL; |
| 417 | |
| 418 | *signature_found = false; |
| 419 | *kernel_path = *initrd_path = *cmdline = NULL; |
| 420 | |
| 421 | hash0 = qcrypto_hash_new(QCRYPTO_HASH_ALGO_SHA384, errp); |
| 422 | if (!hash0) { |
| 423 | goto cleanup; |
| 424 | } |
| 425 | hash1 = qcrypto_hash_new(QCRYPTO_HASH_ALGO_SHA384, errp); |
| 426 | if (!hash1) { |
| 427 | goto cleanup; |
| 428 | } |
| 429 | hash2 = qcrypto_hash_new(QCRYPTO_HASH_ALGO_SHA384, errp); |
| 430 | if (!hash2) { |
| 431 | goto cleanup; |
| 432 | } |
| 433 | |
| 434 | f = fopen(eif_path, "rb"); |
| 435 | if (f == NULL) { |
| 436 | error_setg_errno(errp, errno, "Failed to open %s", eif_path); |
| 437 | goto cleanup; |
| 438 | } |
| 439 | |
| 440 | if (!read_eif_header(f, &eif_header, &crc, errp)) { |
| 441 | goto cleanup; |
| 442 | } |
| 443 | |
| 444 | if (eif_header.version < 4) { |
| 445 | error_setg(errp, "Expected EIF version 4 or greater"); |
| 446 | goto cleanup; |
| 447 | } |
| 448 | |
| 449 | if (eif_header.flags != 0) { |
| 450 | error_setg(errp, "Expected EIF flags to be 0"); |
| 451 | goto cleanup; |
| 452 | } |
| 453 | |
| 454 | if (eif_header.section_cnt > MAX_SECTIONS) { |
| 455 | error_setg(errp, "EIF header section count must not be greater than " |
| 456 | "%d but found %d", MAX_SECTIONS, eif_header.section_cnt); |
| 457 | goto cleanup; |
| 458 | } |
| 459 | |
| 460 | for (int i = 0; i < eif_header.section_cnt; ++i) { |
| 461 | EifSectionHeader hdr; |
| 462 | uint16_t section_type; |
| 463 | |
| 464 | if (eif_header.section_offsets[i] > OFF_MAX) { |
| 465 | error_setg(errp, "Invalid EIF image. Section offset out of bounds"); |
| 466 | goto cleanup; |
| 467 | } |
| 468 | if (fseek(f, eif_header.section_offsets[i], SEEK_SET) != 0) { |
| 469 | error_setg_errno(errp, errno, "Failed to offset to %" PRIu64 " in EIF file", |
| 470 | eif_header.section_offsets[i]); |
| 471 | goto cleanup; |
| 472 | } |
| 473 | |
| 474 | if (!read_eif_section_header(f, &hdr, &crc, errp)) { |
| 475 | goto cleanup; |
| 476 | } |
| 477 | |
| 478 | if (hdr.flags != 0) { |
| 479 | error_setg(errp, "Expected EIF section header flags to be 0"); |
| 480 | goto cleanup; |
| 481 | } |
| 482 | |
| 483 | if (eif_header.section_sizes[i] != hdr.section_size) { |
| 484 | error_setg(errp, "EIF section size mismatch between header and " |
| 485 | "section header: header %" PRIu64 ", section header %" PRIu64, |
| 486 | eif_header.section_sizes[i], |
| 487 | hdr.section_size); |
| 488 | goto cleanup; |
| 489 | } |
| 490 | |
| 491 | section_type = hdr.section_type; |
| 492 | |
| 493 | switch (section_type) { |
| 494 | case EIF_SECTION_KERNEL: |
| 495 | if (seen_sections[EIF_SECTION_KERNEL]) { |
| 496 | error_setg(errp, "Invalid EIF image. More than 1 kernel " |
| 497 | "section"); |
| 498 | goto cleanup; |
| 499 | } |
| 500 | |
| 501 | if (!read_eif_kernel(f, hdr.section_size, kernel_path, hash0, |
| 502 | hash1, &crc, errp)) { |
| 503 | goto cleanup; |
| 504 | } |
| 505 | |
| 506 | break; |
| 507 | case EIF_SECTION_CMDLINE: |
| 508 | { |
| 509 | uint64_t size; |
| 510 | if (seen_sections[EIF_SECTION_CMDLINE]) { |
| 511 | error_setg(errp, "Invalid EIF image. More than 1 cmdline " |
| 512 | "section"); |
| 513 | goto cleanup; |
| 514 | } |
| 515 | size = hdr.section_size; |
| 516 | *cmdline = g_try_malloc(size + 1); |
| 517 | if (!*cmdline) { |
| 518 | error_setg(errp, "Out of memory reading command line section"); |
| 519 | goto cleanup; |
| 520 | } |
| 521 | if (!read_eif_cmdline(f, size, *cmdline, hash0, hash1, &crc, |
| 522 | errp)) { |
| 523 | goto cleanup; |
| 524 | } |
| 525 | (*cmdline)[size] = '\0'; |
| 526 | |
| 527 | break; |
| 528 | } |
| 529 | case EIF_SECTION_RAMDISK: |
| 530 | { |
| 531 | QCryptoHash *h = hash2; |
| 532 | if (!seen_sections[EIF_SECTION_RAMDISK]) { |
| 533 | /* |
| 534 | * If this is the first time we are seeing a ramdisk section, |
| 535 | * we need to: |
| 536 | * 1) hash it into bootstrap (hash1) instead of app (hash2) |
| 537 | * along with image (hash0) |
| 538 | * 2) create the initrd temporary file. |
| 539 | */ |
| 540 | h = hash1; |
| 541 | if (!get_tmp_file("eif-initrd-XXXXXX", initrd_path, errp)) { |
| 542 | goto cleanup; |
| 543 | } |
| 544 | initrd_path_f = fopen(*initrd_path, "wb"); |
| 545 | if (initrd_path_f == NULL) { |
| 546 | error_setg_errno(errp, errno, "Failed to open file %s", |
| 547 | *initrd_path); |
| 548 | goto cleanup; |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | if (!read_eif_ramdisk(f, initrd_path_f, hdr.section_size, hash0, h, |
| 553 | &crc, errp)) { |
| 554 | goto cleanup; |
| 555 | } |
| 556 | |
| 557 | break; |
| 558 | } |
| 559 | case EIF_SECTION_SIGNATURE: |
| 560 | *signature_found = true; |
| 561 | if (!get_signature_fingerprint_sha384(f, hdr.section_size, |
| 562 | fingerprint_hash, &crc, |
| 563 | errp)) { |
| 564 | goto cleanup; |
| 565 | } |
| 566 | break; |
| 567 | default: |
| 568 | /* other sections including invalid or unknown sections */ |
| 569 | { |
| 570 | uint8_t *buf; |
| 571 | size_t got; |
| 572 | uint64_t size = hdr.section_size; |
| 573 | buf = g_try_malloc(size); |
| 574 | if (!buf) { |
| 575 | error_setg(errp, "Out of memory reading unknown section"); |
| 576 | goto cleanup; |
| 577 | } |
| 578 | got = fread(buf, 1, size, f); |
| 579 | if ((uint64_t) got != size) { |
| 580 | g_free(buf); |
| 581 | error_setg(errp, "Failed to read EIF %s section data", |
| 582 | section_type_to_string(section_type)); |
| 583 | goto cleanup; |
| 584 | } |
| 585 | crc = crc32(crc, buf, size); |
| 586 | g_free(buf); |
| 587 | break; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | if (section_type < EIF_SECTION_MAX) { |
| 592 | seen_sections[section_type] = true; |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | if (!seen_sections[EIF_SECTION_KERNEL]) { |
| 597 | error_setg(errp, "Invalid EIF image. No kernel section."); |
| 598 | goto cleanup; |
| 599 | } |
| 600 | if (!seen_sections[EIF_SECTION_CMDLINE]) { |
| 601 | error_setg(errp, "Invalid EIF image. No cmdline section."); |
| 602 | goto cleanup; |
| 603 | } |
| 604 | if (!seen_sections[EIF_SECTION_RAMDISK]) { |
| 605 | error_setg(errp, "Invalid EIF image. No ramdisk section."); |
| 606 | goto cleanup; |
| 607 | } |
| 608 | |
| 609 | if (eif_header.eif_crc32 != crc) { |
| 610 | error_setg(errp, "CRC mismatch. Expected %u but header has %u.", |
| 611 | crc, eif_header.eif_crc32); |
| 612 | goto cleanup; |
| 613 | } |
| 614 | |
| 615 | /* |
| 616 | * Let's append the initrd file from "-initrd" option if any. Although |
| 617 | * we pass the crc pointer to read_eif_ramdisk, it is not useful anymore. |
| 618 | * We have already done the crc mismatch check above this code. |
| 619 | */ |
| 620 | if (machine_initrd) { |
| 621 | machine_initrd_f = fopen(machine_initrd, "rb"); |
| 622 | if (machine_initrd_f == NULL) { |
| 623 | error_setg_errno(errp, errno, "Failed to open initrd file %s", |
| 624 | machine_initrd); |
| 625 | goto cleanup; |
| 626 | } |
| 627 | |
| 628 | machine_initrd_size = get_file_size(machine_initrd_f, errp); |
| 629 | if (machine_initrd_size == -1) { |
| 630 | goto cleanup; |
| 631 | } |
| 632 | |
| 633 | if (!read_eif_ramdisk(machine_initrd_f, initrd_path_f, |
| 634 | machine_initrd_size, hash0, hash2, &crc, errp)) { |
| 635 | goto cleanup; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | if (!get_SHA384_hash(hash0, image_hash, errp)) { |
| 640 | goto cleanup; |
| 641 | } |
| 642 | if (!get_SHA384_hash(hash1, bootstrap_hash, errp)) { |
| 643 | goto cleanup; |
| 644 | } |
| 645 | if (!get_SHA384_hash(hash2, app_hash, errp)) { |
| 646 | goto cleanup; |
| 647 | } |
| 648 | |
| 649 | fclose(f); |
| 650 | fclose(initrd_path_f); |
| 651 | safe_fclose(machine_initrd_f); |
| 652 | return true; |
| 653 | |
| 654 | cleanup: |
| 655 | safe_fclose(f); |
| 656 | safe_fclose(initrd_path_f); |
| 657 | safe_fclose(machine_initrd_f); |
| 658 | |
| 659 | safe_unlink(*kernel_path); |
| 660 | g_free(*kernel_path); |
| 661 | *kernel_path = NULL; |
| 662 | |
| 663 | safe_unlink(*initrd_path); |
| 664 | g_free(*initrd_path); |
| 665 | *initrd_path = NULL; |
| 666 | |
| 667 | g_free(*cmdline); |
| 668 | *cmdline = NULL; |
| 669 | |
| 670 | return false; |
| 671 | } |