| 1 | /* |
| 2 | * S/390 Secure IPL |
| 3 | * |
| 4 | * Functions to support IPL in secure boot mode (DIAG 320, DIAG 508, |
| 5 | * signature verification, and certificate handling). |
| 6 | * |
| 7 | * For secure IPL overview: docs/system/s390x/secure-ipl.rst |
| 8 | * For secure IPL technical: docs/specs/s390x-secure-ipl.rst |
| 9 | * |
| 10 | * Copyright 2025 IBM Corp. |
| 11 | * Author(s): Zhuoying Cai <zycai@linux.ibm.com> |
| 12 | * |
| 13 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 14 | */ |
| 15 | |
| 16 | #include <stdlib.h> |
| 17 | #include <string.h> |
| 18 | #include <stdio.h> |
| 19 | #include "s390-ccw.h" |
| 20 | #include "sclp.h" |
| 21 | #include "secure-ipl.h" |
| 22 | |
| 23 | static VCStorageSizeBlock vcssb __attribute__((__aligned__(8))); |
| 24 | |
| 25 | #define for_each_rb_entry(entry, list) \ |
| 26 | for (entry = (void *)(list) + sizeof((list)->ipl_info_header); \ |
| 27 | (void *)(entry) + sizeof(*(entry)) <= \ |
| 28 | (void *)(list) + (list)->ipl_info_header.len; \ |
| 29 | entry++) |
| 30 | |
| 31 | int zipl_secure_get_vcssb(void) |
| 32 | { |
| 33 | /* avoid retrieving vcssb multiple times */ |
| 34 | if (vcssb.length == VCSSB_LEN_VALID) { |
| 35 | goto out; |
| 36 | } |
| 37 | |
| 38 | vcssb.length = VCSSB_LEN_VALID; |
| 39 | if (_diag320(&vcssb, DIAG_320_SUBC_QUERY_VCSI) != DIAG_320_RC_OK) { |
| 40 | vcssb.length = 0; |
| 41 | } |
| 42 | |
| 43 | out: |
| 44 | return vcssb.length; |
| 45 | } |
| 46 | |
| 47 | static uint32_t request_certificate(uint8_t *cert_buf, uint8_t index) |
| 48 | { |
| 49 | VCEntryHeader *vce_hdr; |
| 50 | struct vcb { |
| 51 | VCBlockHeader vcb_hdr; |
| 52 | struct vce { |
| 53 | VCEntryHeader vce_hdr; |
| 54 | uint8_t cert_buf[CERT_BUF_MAX_LEN]; |
| 55 | } vce; |
| 56 | } __attribute__((__aligned__(PAGE_SIZE))) vcb = { 0 }; |
| 57 | |
| 58 | /* |
| 59 | * Request single entry |
| 60 | * Fill input fields of single-entry VCB |
| 61 | * |
| 62 | * First and last index must be equal because only one |
| 63 | * VCE per VCB is currently supported |
| 64 | */ |
| 65 | vcb.vcb_hdr.in_len = ROUND_UP(vcssb.max_single_vcb_len, PAGE_SIZE); |
| 66 | vcb.vcb_hdr.first_vc_index = index; |
| 67 | vcb.vcb_hdr.last_vc_index = index; |
| 68 | |
| 69 | if (_diag320(&vcb, DIAG_320_SUBC_STORE_VC) != DIAG_320_RC_OK) { |
| 70 | puts("Could not get certificate"); |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | if (vcb.vcb_hdr.out_len == sizeof(VCBlockHeader)) { |
| 75 | puts("No certificate entry"); |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | if (vcb.vcb_hdr.remain_ct != 0) { |
| 80 | panic("Not enough memory to store requested certificate"); |
| 81 | } |
| 82 | |
| 83 | vce_hdr = &vcb.vce.vce_hdr; |
| 84 | if (!(vce_hdr->flags & DIAG_320_VCE_FLAGS_VALID)) { |
| 85 | puts("Invalid certificate"); |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | memcpy(cert_buf, (uint8_t *)&vcb.vce + vce_hdr->cert_offset, vce_hdr->cert_len); |
| 90 | |
| 91 | return vce_hdr->cert_len; |
| 92 | } |
| 93 | |
| 94 | static int cert_list_add(IplSignatureCertificateList *cert_list, |
| 95 | IplSignatureCertificateEntry cert_entry) |
| 96 | { |
| 97 | int cert_entry_idx; |
| 98 | |
| 99 | cert_entry_idx = (cert_list->ipl_info_header.len - sizeof(IplInfoBlockHeader)) / |
| 100 | sizeof(IplSignatureCertificateEntry); |
| 101 | |
| 102 | cert_list->cert_entries[cert_entry_idx] = cert_entry; |
| 103 | cert_list->ipl_info_header.len += sizeof(IplSignatureCertificateEntry); |
| 104 | |
| 105 | return cert_entry_idx; |
| 106 | } |
| 107 | |
| 108 | static void comp_list_add(IplDeviceComponentList *comp_list, |
| 109 | IplDeviceComponentEntry comp_entry) |
| 110 | { |
| 111 | int comp_entry_idx; |
| 112 | |
| 113 | comp_entry_idx = (comp_list->ipl_info_header.len - sizeof(IplInfoBlockHeader)) / |
| 114 | sizeof(IplDeviceComponentEntry); |
| 115 | if (comp_entry_idx > MAX_COMP_ENTRIES - 1) { |
| 116 | printf("Warning: only %d component entries are supported\n", |
| 117 | MAX_COMP_ENTRIES); |
| 118 | panic("The device component list has reached its maximum capacity"); |
| 119 | } |
| 120 | |
| 121 | comp_list->device_entries[comp_entry_idx] = comp_entry; |
| 122 | comp_list->ipl_info_header.len += sizeof(IplDeviceComponentEntry); |
| 123 | } |
| 124 | |
| 125 | void update_iirb(IplDeviceComponentList *comp_list, |
| 126 | IplSignatureCertificateList *cert_list) |
| 127 | { |
| 128 | IplInfoReportBlock *iirb; |
| 129 | IplDeviceComponentList *iirb_comps; |
| 130 | IplSignatureCertificateList *iirb_certs; |
| 131 | uint32_t iirb_hdr_len; |
| 132 | uint32_t comps_len; |
| 133 | uint32_t certs_len; |
| 134 | |
| 135 | if (iplb->len % 8 != 0) { |
| 136 | panic("IPL parameter block length field value is not multiple of 8 bytes"); |
| 137 | } |
| 138 | |
| 139 | iirb_hdr_len = sizeof(IplInfoReportBlockHeader); |
| 140 | comps_len = comp_list->ipl_info_header.len; |
| 141 | certs_len = cert_list->ipl_info_header.len; |
| 142 | if ((comps_len + certs_len + iirb_hdr_len) > sizeof(IplInfoReportBlock)) { |
| 143 | panic("Not enough space to hold all components and certificates in IIRB"); |
| 144 | } |
| 145 | |
| 146 | /* IIRB immediately follows IPLB */ |
| 147 | iirb = &ipl_blocks.iirb; |
| 148 | iirb->hdr.len = iirb_hdr_len; |
| 149 | |
| 150 | /* Copy IPL device component list after IIRB Header */ |
| 151 | iirb_comps = (IplDeviceComponentList *) iirb->info_blks; |
| 152 | memcpy(iirb_comps, comp_list, comps_len); |
| 153 | |
| 154 | /* Update IIRB length */ |
| 155 | iirb->hdr.len += comps_len; |
| 156 | |
| 157 | /* Copy IPL sig cert list after IPL device component list */ |
| 158 | iirb_certs = (IplSignatureCertificateList *) (iirb->info_blks + |
| 159 | iirb_comps->ipl_info_header.len); |
| 160 | memcpy(iirb_certs, cert_list, certs_len); |
| 161 | |
| 162 | /* Update IIRB length */ |
| 163 | iirb->hdr.len += certs_len; |
| 164 | } |
| 165 | |
| 166 | bool secure_ipl_supported(void) |
| 167 | { |
| 168 | if (!sclp_is_fac_ipl_flag_on(SCCB_FAC_IPL_SIPL_BIT)) { |
| 169 | puts("Secure IPL Facility is not supported by the hypervisor!"); |
| 170 | return false; |
| 171 | } |
| 172 | |
| 173 | if (!is_signature_verif_supported()) { |
| 174 | puts("Secure IPL extensions are not supported by the hypervisor!"); |
| 175 | return false; |
| 176 | } |
| 177 | |
| 178 | if (!is_cert_store_facility_supported()) { |
| 179 | puts("Certificate Store Facility is not supported by the hypervisor!"); |
| 180 | return false; |
| 181 | } |
| 182 | |
| 183 | if (!sclp_is_fac_ipl_flag_on(SCCB_FAC_IPL_SCLAF_BIT)) { |
| 184 | puts("Secure IPL Code Loading Attributes Facility is not supported by" |
| 185 | " the hypervisor!"); |
| 186 | return false; |
| 187 | } |
| 188 | |
| 189 | return true; |
| 190 | } |
| 191 | |
| 192 | static void init_lists(IplDeviceComponentList *comp_list, |
| 193 | IplSignatureCertificateList *cert_list) |
| 194 | { |
| 195 | comp_list->ipl_info_header.type = IPL_INFO_BLOCK_TYPE_COMPONENTS; |
| 196 | comp_list->ipl_info_header.len = sizeof(IplInfoBlockHeader); |
| 197 | |
| 198 | cert_list->ipl_info_header.type = IPL_INFO_BLOCK_TYPE_CERTIFICATES; |
| 199 | cert_list->ipl_info_header.len = sizeof(IplInfoBlockHeader); |
| 200 | } |
| 201 | |
| 202 | static void check_comp_overlap(IplDeviceComponentList *comp_list, |
| 203 | IplDeviceComponentEntry comp_entry) |
| 204 | { |
| 205 | IplDeviceComponentEntry *comp; |
| 206 | |
| 207 | /* |
| 208 | * Check component's address range does not overlap with any |
| 209 | * signed component's address range. |
| 210 | */ |
| 211 | for_each_rb_entry(comp, comp_list) { |
| 212 | if (comp->flags & S390_IPL_DEV_COMP_FLAG_SC && |
| 213 | intersects(comp->addr, comp->len, comp_entry.addr, comp_entry.len)) { |
| 214 | zipl_secure_error("Component addresses overlap"); |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | static bool is_psw_valid(uint64_t psw, IplDeviceComponentEntry *comp) |
| 220 | { |
| 221 | uint32_t addr = psw & 0x7fffffff; |
| 222 | |
| 223 | /* |
| 224 | * PSW points within a signed binary code component |
| 225 | * |
| 226 | * Check addr falls within [comp->addr, comp->addr + comp->len - 2], |
| 227 | * ensuring at least 2 bytes (minimum instruction length) remain. |
| 228 | */ |
| 229 | return intersects(addr, 1, comp->addr, comp->len - 1); |
| 230 | } |
| 231 | |
| 232 | void check_global_sclab(const SclaBlock *global_sclab, |
| 233 | IplDeviceComponentEntry *comp_entry, |
| 234 | IplDeviceComponentList *comp_list) |
| 235 | { |
| 236 | bool psw_valid = false; |
| 237 | bool global_psw_valid = false; |
| 238 | int signed_count = 0; |
| 239 | int unsigned_count = 0; |
| 240 | IplDeviceComponentEntry *comp; |
| 241 | |
| 242 | if (!global_sclab) { |
| 243 | comp_list->ipl_info_header.iiei |= S390_IIEI_NO_GLOBAL_SCLAB; |
| 244 | zipl_secure_error("Global SCLAB does not exist"); |
| 245 | return; |
| 246 | } |
| 247 | |
| 248 | for_each_rb_entry(comp, comp_list) { |
| 249 | if (comp->flags & S390_IPL_DEV_COMP_FLAG_SC) { |
| 250 | psw_valid |= is_psw_valid(comp_entry->addr, comp); |
| 251 | global_psw_valid |= is_psw_valid(global_sclab->load_psw, comp); |
| 252 | signed_count += 1; |
| 253 | } else { |
| 254 | unsigned_count += 1; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | /* validate load PSW with PSW specified in the final entry */ |
| 259 | zipl_secure_validate(psw_valid && global_psw_valid, &comp_entry->cei, |
| 260 | S390_CEI_INVALID_LOAD_PSW, "Invalid PSW"); |
| 261 | |
| 262 | /* compare load PSW with the PSW specified in component */ |
| 263 | zipl_secure_validate(global_sclab->load_psw == comp_entry->addr, |
| 264 | &comp_entry->cei, S390_CEI_UNMATCHED_SCLAB_LOAD_PSW, |
| 265 | "Load PSW does not match with PSW in component"); |
| 266 | |
| 267 | /* Unsigned components are not allowed if NUC flag is set in the global SCLAB */ |
| 268 | if ((global_sclab->flags & S390_SCLAB_NUC) && unsigned_count > 0) { |
| 269 | comp_list->ipl_info_header.iiei |= S390_IIEI_FOUND_UNSIGNED_COMP; |
| 270 | zipl_secure_error("Unsigned components are not allowed"); |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * Only one signed component is allowed if SC flag is set in the global SCLAB |
| 275 | * More than one component in the component table is not allowed |
| 276 | */ |
| 277 | if ((global_sclab->flags & S390_SCLAB_SC) && |
| 278 | (signed_count != 1 || unsigned_count != 0)) { |
| 279 | comp_list->ipl_info_header.iiei |= S390_IIEI_MORE_SIGNED_COMP; |
| 280 | zipl_secure_error("Only one signed component is allowed"); |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | static void check_sclab(SclaBlock **global_sclab, |
| 285 | IplDeviceComponentEntry *comp_entry, |
| 286 | IplInfoBlockHeader *comp_list_hdr) |
| 287 | { |
| 288 | SclabOriginLocator *sclab_locator; |
| 289 | SclaBlock *sclab; |
| 290 | |
| 291 | /* must be large enough to locate the sclab locator, else implies invalid SCLAB */ |
| 292 | zipl_secure_validate(comp_entry->len >= 8, &comp_entry->cei, |
| 293 | S390_CEI_INVALID_SCLAB, |
| 294 | "Signed component too short to contain SCLAB locator"); |
| 295 | |
| 296 | if (comp_entry->cei & S390_CEI_INVALID_SCLAB) { |
| 297 | return; |
| 298 | } |
| 299 | |
| 300 | /* sclab locator is located at the last 8 bytes of the signed comp */ |
| 301 | sclab_locator = (SclabOriginLocator *)(comp_entry->addr + |
| 302 | comp_entry->len - 8); |
| 303 | |
| 304 | /* return early if sclab does not exist */ |
| 305 | zipl_secure_validate(magic_match(sclab_locator->magic, ZIPL_MAGIC), |
| 306 | &comp_entry->cei, S390_CEI_INVALID_SCLAB, |
| 307 | "Magic does not match. SCLAB does not exist"); |
| 308 | |
| 309 | if (comp_entry->cei & S390_CEI_INVALID_SCLAB) { |
| 310 | return; |
| 311 | } |
| 312 | |
| 313 | zipl_secure_validate(sclab_locator->len >= S390_SCLAB_MIN_LEN, &comp_entry->cei, |
| 314 | S390_CEI_INVALID_SCLAB_LEN | S390_CEI_INVALID_SCLAB, |
| 315 | "Invalid SCLAB length"); |
| 316 | |
| 317 | /* return early if sclab is invalid */ |
| 318 | if (comp_entry->cei & S390_CEI_INVALID_SCLAB) { |
| 319 | return; |
| 320 | } |
| 321 | |
| 322 | sclab = (SclaBlock *)(comp_entry->addr + comp_entry->len - |
| 323 | sclab_locator->len); |
| 324 | |
| 325 | zipl_secure_validate(sclab->format == 0, &comp_entry->cei, |
| 326 | S390_CEI_INVALID_SCLAB_FORMAT, |
| 327 | "Format-0 SCLAB is not being used"); |
| 328 | |
| 329 | if (!(sclab->flags & S390_SCLAB_OPSW)) { |
| 330 | /* OPSW = 0 - Load PSW field in SCLAB must contain zeros */ |
| 331 | zipl_secure_validate(sclab->load_psw == 0, &comp_entry->cei, |
| 332 | S390_CEI_SCLAB_LOAD_PSW_NOT_ZERO, |
| 333 | "Load PSW is not zero when Override PSW bit is zero"); |
| 334 | } else { |
| 335 | /* OPSW = 1 indicating global SCLAB */ |
| 336 | if (*global_sclab) { |
| 337 | comp_list_hdr->iiei |= S390_IIEI_MORE_GLOBAL_SCLAB; |
| 338 | zipl_secure_error("More than one global SCLAB"); |
| 339 | } |
| 340 | *global_sclab = sclab; |
| 341 | |
| 342 | /* override load address flag must set to one */ |
| 343 | zipl_secure_validate(sclab->flags & S390_SCLAB_OLA, &comp_entry->cei, |
| 344 | S390_CEI_SCLAB_OLA_NOT_ONE, |
| 345 | "OLA flag is not set to one in the global SCLAB"); |
| 346 | } |
| 347 | |
| 348 | if (!(sclab->flags & S390_SCLAB_OLA)) { |
| 349 | /* OLA = 0 - Load address field in SCLAB must contain zeros */ |
| 350 | zipl_secure_validate(sclab->load_addr == 0, &comp_entry->cei, |
| 351 | S390_CEI_SCLAB_LOAD_ADDR_NOT_ZERO, |
| 352 | "Load Address is not zero when OLA flag is zero"); |
| 353 | } else { |
| 354 | /* OLA = 1 - Load address field must match storage address of the component */ |
| 355 | zipl_secure_validate(sclab->load_addr == comp_entry->addr, &comp_entry->cei, |
| 356 | S390_CEI_UNMATCHED_SCLAB_LOAD_ADDR, |
| 357 | "Load Address does not match with component load address"); |
| 358 | } |
| 359 | |
| 360 | zipl_secure_validate(~sclab->flags & S390_SCLAB_NUC || sclab->flags & S390_SCLAB_OPSW, |
| 361 | &comp_entry->cei, S390_CEI_NUC_NOT_IN_GLOBAL_SCLAB, |
| 362 | "NUC bit is set, but not in the global SCLAB"); |
| 363 | |
| 364 | zipl_secure_validate(~sclab->flags & S390_SCLAB_SC || sclab->flags & S390_SCLAB_OPSW, |
| 365 | &comp_entry->cei, S390_CEI_SC_NOT_IN_GLOBAL_SCLAB, |
| 366 | "SC bit is set, but not in the global SCLAB"); |
| 367 | } |
| 368 | |
| 369 | static int zipl_load_signature(ComponentEntry *entry, uint64_t sig) |
| 370 | { |
| 371 | if (entry->compdat.sig_info.format != DER_SIGNATURE_FORMAT) { |
| 372 | puts("Signature is not in DER format"); |
| 373 | return -1; |
| 374 | } |
| 375 | |
| 376 | if (zipl_load_segment(entry->data.blockno, sig) < 0) { |
| 377 | return -1; |
| 378 | } |
| 379 | |
| 380 | return entry->compdat.sig_info.sig_len; |
| 381 | } |
| 382 | |
| 383 | void update_cert_list(IplSignatureCertificateList *cert_list) |
| 384 | { |
| 385 | IplSignatureCertificateEntry *cert_entry; |
| 386 | uint8_t *cert_buf; |
| 387 | |
| 388 | /* |
| 389 | * Recover the original base address of ipl_data for cert storage. |
| 390 | * |
| 391 | * The IplParameterBlocks stored in ipl_data will no longer be needed |
| 392 | * after this point. Reuse this region to store certificates from the |
| 393 | * BIOS heap into stable memory. |
| 394 | */ |
| 395 | cert_buf = (uint8_t *)qipl.ipl_data - qipl.index * sizeof(IplParameterBlock); |
| 396 | |
| 397 | for_each_rb_entry(cert_entry, cert_list) { |
| 398 | memcpy(cert_buf, (uint8_t *)cert_entry->addr, cert_entry->len); |
| 399 | cert_entry->addr = (uint64_t)cert_buf; |
| 400 | cert_buf += cert_entry->len; |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | int zipl_run_secure(ComponentEntry **entry_ptr, const uint8_t *tmp_sec, |
| 405 | IplDeviceComponentList *comp_list, |
| 406 | IplSignatureCertificateList *cert_list, |
| 407 | uint8_t **tmp_cert_buf) |
| 408 | { |
| 409 | /* |
| 410 | * Keep track of which certificate store indices correspond to the |
| 411 | * certificate data entries within the IplSignatureCertificateList to |
| 412 | * prevent allocating space for the same certificate multiple times. |
| 413 | * |
| 414 | * The array index corresponds to the certificate's cert-store index. |
| 415 | * |
| 416 | * The array value corresponds to the certificate's entry within the |
| 417 | * IplSignatureCertificateList (with a value of -1 denoting no entry |
| 418 | * exists for the certificate). |
| 419 | */ |
| 420 | int cert_list_table[vcssb.total_vc_ct + 1]; |
| 421 | IplSignatureCertificateEntry sig_entry = { 0 }; |
| 422 | IplSignatureCertificateEntry cert_entry; |
| 423 | IplDeviceComponentEntry comp_entry; |
| 424 | ComponentEntry *entry = *entry_ptr; |
| 425 | int rc = -1; |
| 426 | int sig_len = 0; |
| 427 | int comp_len; |
| 428 | int cert_entry_idx; |
| 429 | uint64_t comp_addr; |
| 430 | uint8_t cert_table_idx; |
| 431 | uint8_t *tmp_buf; |
| 432 | bool verified; |
| 433 | bool signed_found = false; |
| 434 | bool sclab_found = false; |
| 435 | SclaBlock *global_sclab = NULL; |
| 436 | |
| 437 | if ((MAX_SIGNED_COMP * CERT_BUF_MAX_LEN) > CERT_BUF_SIZE) { |
| 438 | panic("Not enough memory to store certificates"); |
| 439 | } |
| 440 | *tmp_cert_buf = malloc(CERT_BUF_SIZE); |
| 441 | tmp_buf = *tmp_cert_buf; |
| 442 | |
| 443 | init_lists(comp_list, cert_list); |
| 444 | sig_entry.addr = (uint64_t)malloc(MAX_SECTOR_SIZE); |
| 445 | memset(cert_list_table, -1, sizeof(cert_list_table)); |
| 446 | |
| 447 | while (entry->component_type != ZIPL_COMP_ENTRY_EXEC) { |
| 448 | switch (entry->component_type) { |
| 449 | case ZIPL_COMP_ENTRY_SIGNATURE: |
| 450 | if (sig_entry.len) { |
| 451 | goto error; |
| 452 | } |
| 453 | |
| 454 | sig_len = zipl_load_signature(entry, sig_entry.addr); |
| 455 | if (sig_len < 0) { |
| 456 | goto error; |
| 457 | } |
| 458 | |
| 459 | sig_entry.len = sig_len; |
| 460 | break; |
| 461 | case ZIPL_COMP_ENTRY_LOAD: |
| 462 | comp_addr = entry->compdat.load_addr; |
| 463 | comp_len = zipl_load_segment(entry->data.blockno, comp_addr); |
| 464 | if (comp_len < 0) { |
| 465 | goto error; |
| 466 | } |
| 467 | |
| 468 | comp_entry = (IplDeviceComponentEntry){ 0 }; |
| 469 | comp_entry.addr = comp_addr; |
| 470 | comp_entry.len = (uint64_t)comp_len; |
| 471 | |
| 472 | check_comp_overlap(comp_list, comp_entry); |
| 473 | |
| 474 | /* no signature present (unsigned component) */ |
| 475 | if (!sig_entry.len) { |
| 476 | zipl_secure_validate(comp_entry.addr >= S390_UNSIGNED_MIN_ADDR, |
| 477 | &comp_entry.cei, S390_CEI_INVALID_UNSIGNED_ADDR, |
| 478 | "Load address for unsigned component is less than 0x2000"); |
| 479 | |
| 480 | comp_list_add(comp_list, comp_entry); |
| 481 | break; |
| 482 | } |
| 483 | |
| 484 | /* |
| 485 | * Initialize with SC flag (signed component) |
| 486 | * CSV flag set upon successful verification |
| 487 | */ |
| 488 | comp_entry.flags = S390_IPL_DEV_COMP_FLAG_SC; |
| 489 | signed_found = true; |
| 490 | |
| 491 | check_sclab(&global_sclab, &comp_entry, &comp_list->ipl_info_header); |
| 492 | sclab_found |= !(comp_entry.cei & S390_CEI_INVALID_SCLAB); |
| 493 | |
| 494 | cert_entry = (IplSignatureCertificateEntry) { 0 }; |
| 495 | verified = verify_signature(comp_entry, sig_entry, |
| 496 | &cert_entry.len, &cert_table_idx); |
| 497 | |
| 498 | if (verified) { |
| 499 | if (cert_list_table[cert_table_idx] == -1) { |
| 500 | if (!request_certificate(tmp_buf, cert_table_idx)) { |
| 501 | puts("Could not get certificate"); |
| 502 | goto error; |
| 503 | } |
| 504 | |
| 505 | cert_entry.addr = (uint64_t)tmp_buf; |
| 506 | cert_entry_idx = cert_list_add(cert_list, cert_entry); |
| 507 | /* map cert-store index to cert-list entry index */ |
| 508 | cert_list_table[cert_table_idx] = cert_entry_idx; |
| 509 | /* increment for the next certificate */ |
| 510 | tmp_buf += cert_entry.len; |
| 511 | } |
| 512 | |
| 513 | comp_entry.cert_index = cert_list_table[cert_table_idx]; |
| 514 | comp_entry.flags |= S390_IPL_DEV_COMP_FLAG_CSV; |
| 515 | puts("Verified component"); |
| 516 | } else { |
| 517 | zipl_secure_error("Could not verify component"); |
| 518 | } |
| 519 | |
| 520 | comp_list_add(comp_list, comp_entry); |
| 521 | |
| 522 | /* After a signature is used another new one can be accepted */ |
| 523 | sig_entry.len = 0; |
| 524 | break; |
| 525 | default: |
| 526 | puts("Unknown component entry type"); |
| 527 | goto error; |
| 528 | } |
| 529 | |
| 530 | entry++; |
| 531 | |
| 532 | if ((uint8_t *)(&entry[1]) > tmp_sec + MAX_SECTOR_SIZE) { |
| 533 | puts("Wrong entry value"); |
| 534 | rc = -EINVAL; |
| 535 | goto error; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | zipl_secure_validate(signed_found, &comp_list->ipl_info_header.iiei, |
| 540 | S390_IIEI_NO_SIGNED_COMP, |
| 541 | "Secure boot is on, but components are not signed"); |
| 542 | |
| 543 | zipl_secure_validate(sclab_found, &comp_list->ipl_info_header.iiei, |
| 544 | S390_IIEI_NO_SCLAB, "No recognizable SCLAB"); |
| 545 | |
| 546 | comp_entry = (IplDeviceComponentEntry){ 0 }; |
| 547 | comp_entry.addr = entry->compdat.load_psw; |
| 548 | check_global_sclab(global_sclab, &comp_entry, comp_list); |
| 549 | comp_list_add(comp_list, comp_entry); |
| 550 | |
| 551 | *entry_ptr = entry; |
| 552 | free((void *)sig_entry.addr); |
| 553 | |
| 554 | return 0; |
| 555 | error: |
| 556 | free(*tmp_cert_buf); |
| 557 | *tmp_cert_buf = NULL; |
| 558 | free((void *)sig_entry.addr); |
| 559 | |
| 560 | return rc; |
| 561 | } |