1 /* Copyright (c) 2013 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 * Display functions used in kernel selection.
6 */
7
8 #include "sysincludes.h"
9
10 #include "bmpblk_font.h"
11 #include "gbb_access.h"
12 #include "gbb_header.h"
13 #include "region.h"
14 #include "utility.h"
15 #include "vboot_api.h"
16 #include "vboot_common.h"
17 #include "vboot_display.h"
18 #include "vboot_nvstorage.h"
19
20 static uint32_t disp_current_screen = VB_SCREEN_BLANK;
21 static uint32_t disp_width = 0, disp_height = 0;
22
VbGetLocalizationCount(VbCommonParams * cparams,uint32_t * count)23 VbError_t VbGetLocalizationCount(VbCommonParams *cparams, uint32_t *count)
24 {
25 BmpBlockHeader hdr;
26 VbError_t ret;
27
28 /* Default to 0 on error */
29 *count = 0;
30
31 ret = VbGbbReadBmpHeader(cparams, &hdr);
32 if (ret)
33 return ret;
34
35 *count = hdr.number_of_localizations;
36 return VBERROR_SUCCESS;
37 }
38
39 /*
40 * TODO: We could cache the font info to speed things up, by making the
41 * in-memory font structure distinct from the in-flash version. We'll do that
42 * Real Soon Now. Until then, we just repeat the same linear search every time.
43 */
44
VbInternalizeFontData(FontArrayHeader * fonthdr)45 VbFont_t *VbInternalizeFontData(FontArrayHeader *fonthdr)
46 {
47 /* Just return the raw data pointer for now. */
48 return (VbFont_t *)fonthdr;
49 }
50
VbDoneWithFontForNow(VbFont_t * ptr)51 void VbDoneWithFontForNow(VbFont_t *ptr)
52 {
53 /* Nothing. */
54 }
55
VbFindFontGlyph(VbFont_t * font,uint32_t ascii,void ** bufferptr,uint32_t * buffersize)56 ImageInfo *VbFindFontGlyph(VbFont_t *font, uint32_t ascii,
57 void **bufferptr, uint32_t *buffersize)
58 {
59 uint8_t *ptr, *firstptr;
60 uint32_t max;
61 uint32_t i;
62 FontArrayEntryHeader *entry;
63
64 ptr = (uint8_t *)font;
65 max = ((FontArrayHeader *)ptr)->num_entries;
66 ptr += sizeof(FontArrayHeader);
67 firstptr = ptr;
68
69 /*
70 * Simple linear search.
71 *
72 * Note: We're assuming glpyhs are uncompressed. That's true because
73 * the bmpblk_font tool doesn't compress anything. The bmpblk_utility
74 * does, but it compresses the entire font blob at once, and we've
75 * already uncompressed that before we got here.
76 */
77 for(i=0; i<max; i++) {
78 entry = (FontArrayEntryHeader *)ptr;
79 if (entry->ascii == ascii) {
80 *bufferptr = ptr + sizeof(FontArrayEntryHeader);
81 *buffersize = entry->info.original_size;
82 return &(entry->info);
83 }
84 ptr += sizeof(FontArrayEntryHeader)+entry->info.compressed_size;
85 }
86
87 /*
88 * We must return something valid. We'll just use the first glyph in
89 * the font structure (so it should be something distinct).
90 */
91 entry = (FontArrayEntryHeader *)firstptr;
92 *bufferptr = firstptr + sizeof(FontArrayEntryHeader);
93 *buffersize = entry->info.original_size;
94 return &(entry->info);
95 }
96
VbRenderTextAtPos(const char * text,int right_to_left,uint32_t x,uint32_t y,VbFont_t * font)97 void VbRenderTextAtPos(const char *text, int right_to_left,
98 uint32_t x, uint32_t y, VbFont_t *font)
99 {
100 int i;
101 ImageInfo *image_info = 0;
102 void *buffer;
103 uint32_t buffersize;
104 uint32_t cur_x = x, cur_y = y;
105
106 if (!text || !font) {
107 VBDEBUG((" VbRenderTextAtPos: invalid args\n"));
108 return;
109 }
110
111 for (i=0; text[i]; i++) {
112
113 if (text[i] == '\n') {
114 if (!image_info)
115 image_info = VbFindFontGlyph(font, text[i],
116 &buffer,
117 &buffersize);
118 cur_x = x;
119 cur_y += image_info->height;
120 continue;
121 }
122
123 image_info = VbFindFontGlyph(font, text[i], &buffer,
124 &buffersize);
125
126 if (right_to_left)
127 cur_x -= image_info->width;
128
129 if (VBERROR_SUCCESS != VbExDisplayImage(cur_x, cur_y, buffer,
130 buffersize)) {
131 VBDEBUG((" VbRenderTextAtPos: "
132 "can't display ascii 0x%x\n", text[i]));
133 }
134
135 if (!right_to_left)
136 cur_x += image_info->width;
137 }
138 }
139
VbDisplayScreenFromGBB(VbCommonParams * cparams,uint32_t screen,VbNvContext * vncptr)140 VbError_t VbDisplayScreenFromGBB(VbCommonParams *cparams, uint32_t screen,
141 VbNvContext *vncptr)
142 {
143 char *fullimage = NULL;
144 BmpBlockHeader hdr;
145 uint32_t screen_index;
146 uint32_t localization = 0;
147 VbError_t retval = VBERROR_UNKNOWN; /* Assume error until proven ok */
148 uint32_t inoutsize;
149 uint32_t i;
150 VbFont_t *font;
151 const char *text_to_show;
152 int rtol = 0;
153 VbError_t ret;
154
155 ret = VbGbbReadBmpHeader(cparams, &hdr);
156 if (ret)
157 return ret;
158
159 /*
160 * Translate screen ID into index. Note that not all screens are in
161 * the GBB.
162 *
163 * TODO: ensure screen IDs match indices? Having this translation here
164 * is awful.
165 */
166 switch (screen) {
167 case VB_SCREEN_DEVELOPER_WARNING:
168 screen_index = SCREEN_DEVELOPER_WARNING;
169 break;
170 case VB_SCREEN_RECOVERY_REMOVE:
171 screen_index = SCREEN_RECOVERY_REMOVE;
172 break;
173 case VB_SCREEN_RECOVERY_NO_GOOD:
174 screen_index = SCREEN_RECOVERY_NO_GOOD;
175 break;
176 case VB_SCREEN_RECOVERY_INSERT:
177 screen_index = SCREEN_RECOVERY_INSERT;
178 break;
179 case VB_SCREEN_RECOVERY_TO_DEV:
180 screen_index = SCREEN_RECOVERY_TO_DEV;
181 break;
182 case VB_SCREEN_DEVELOPER_TO_NORM:
183 screen_index = SCREEN_DEVELOPER_TO_NORM;
184 break;
185 case VB_SCREEN_WAIT:
186 screen_index = SCREEN_WAIT;
187 break;
188 case VB_SCREEN_TO_NORM_CONFIRMED:
189 screen_index = SCREEN_TO_NORM_CONFIRMED;
190 break;
191 case VB_SCREEN_BLANK:
192 case VB_SCREEN_DEVELOPER_EGG:
193 default:
194 /* Screens which aren't in the GBB */
195 VBDEBUG(("VbDisplayScreenFromGBB(): screen %d not in the GBB\n",
196 (int)screen));
197 retval = VBERROR_INVALID_SCREEN_INDEX;
198 goto VbDisplayScreenFromGBB_exit;
199 }
200
201 if (screen_index >= hdr.number_of_screenlayouts) {
202 VBDEBUG(("VbDisplayScreenFromGBB(): "
203 "screen %d index %d not in the GBB\n",
204 (int)screen, (int)screen_index));
205 retval = VBERROR_INVALID_SCREEN_INDEX;
206 goto VbDisplayScreenFromGBB_exit;
207 }
208
209 /* Clip localization to number of localizations present in the GBB */
210 VbNvGet(vncptr, VBNV_LOCALIZATION_INDEX, &localization);
211 if (localization >= hdr.number_of_localizations) {
212 localization = 0;
213 VbNvSet(vncptr, VBNV_LOCALIZATION_INDEX, localization);
214 VbNvSet(vncptr, VBNV_BACKUP_NVRAM_REQUEST, 1);
215 }
216
217 /* Display all bitmaps for the image */
218 for (i = 0; i < MAX_IMAGE_IN_LAYOUT; i++) {
219 ScreenLayout layout;
220 ImageInfo image_info;
221 char hwid[256];
222
223 ret = VbGbbReadImage(cparams, localization, screen_index,
224 i, &layout, &image_info,
225 &fullimage, &inoutsize);
226 if (ret == VBERROR_NO_IMAGE_PRESENT) {
227 continue;
228 } else if (ret) {
229 retval = ret;
230 goto VbDisplayScreenFromGBB_exit;
231 }
232
233 switch(image_info.format) {
234 case FORMAT_BMP:
235 if (i == 0) {
236 /**
237 * In current version GBB bitmaps, first image
238 * is always the background.
239 */
240 ret = VbExDisplaySetDimension(
241 image_info.width,
242 image_info.height);
243 if (ret) {
244 VBDEBUG(("VbExDisplaySetDimension"
245 "(%d,%d): failed (%#x).\n",
246 image_info.width,
247 image_info.height, ret));
248 }
249 }
250
251 retval = VbExDisplayImage(layout.images[i].x,
252 layout.images[i].y,
253 fullimage, inoutsize);
254 break;
255
256 case FORMAT_FONT:
257 /*
258 * The uncompressed blob is our font structure. Cache
259 * it as needed.
260 */
261 font = VbInternalizeFontData(
262 (FontArrayHeader *)fullimage);
263
264 /* TODO: handle text in general here */
265 if (TAG_HWID == image_info.tag ||
266 TAG_HWID_RTOL == image_info.tag) {
267 VbRegionReadHWID(cparams, hwid, sizeof(hwid));
268 text_to_show = hwid;
269 rtol = (TAG_HWID_RTOL == image_info.tag);
270 } else {
271 text_to_show = "";
272 rtol = 0;
273 }
274
275 VbRenderTextAtPos(text_to_show, rtol,
276 layout.images[i].x,
277 layout.images[i].y, font);
278
279 VbDoneWithFontForNow(font);
280 break;
281
282 default:
283 VBDEBUG(("VbDisplayScreenFromGBB(): "
284 "unsupported ImageFormat %d\n",
285 image_info.format));
286 retval = VBERROR_INVALID_GBB;
287 }
288
289 VbExFree(fullimage);
290
291 if (VBERROR_SUCCESS != retval)
292 goto VbDisplayScreenFromGBB_exit;
293 }
294
295 /* Successful if all bitmaps displayed */
296 retval = VBERROR_SUCCESS;
297
298 VbRegionCheckVersion(cparams);
299
300 VbDisplayScreenFromGBB_exit:
301 VBDEBUG(("leaving VbDisplayScreenFromGBB() with %d\n",retval));
302 return retval;
303 }
304
VbDisplayScreen(VbCommonParams * cparams,uint32_t screen,int force,VbNvContext * vncptr)305 VbError_t VbDisplayScreen(VbCommonParams *cparams, uint32_t screen,
306 int force, VbNvContext *vncptr)
307 {
308 VbError_t retval;
309
310 /* Initialize display if necessary */
311 if (!disp_width) {
312 retval = VbExDisplayInit(&disp_width, &disp_height);
313 if (VBERROR_SUCCESS != retval)
314 return retval;
315 }
316
317 /* If requested screen is the same as the current one, we're done. */
318 if (disp_current_screen == screen && 0 == force)
319 return VBERROR_SUCCESS;
320
321 /* If the screen is blank, turn off the backlight; else turn it on. */
322 VbExDisplayBacklight(VB_SCREEN_BLANK == screen ? 0 : 1);
323
324 /* Request the screen */
325 disp_current_screen = screen;
326
327 /* Look in the GBB first */
328 if (VBERROR_SUCCESS == VbDisplayScreenFromGBB(cparams, screen,
329 vncptr))
330 return VBERROR_SUCCESS;
331
332 /* If screen wasn't in the GBB bitmaps, fall back to a default */
333 return VbExDisplayScreen(screen);
334 }
335
Uint8ToString(char * buf,uint8_t val)336 static void Uint8ToString(char *buf, uint8_t val)
337 {
338 const char *trans = "0123456789abcdef";
339 *buf++ = trans[val >> 4];
340 *buf = trans[val & 0xF];
341 }
342
FillInSha1Sum(char * outbuf,VbPublicKey * key)343 static void FillInSha1Sum(char *outbuf, VbPublicKey *key)
344 {
345 uint8_t *buf = ((uint8_t *)key) + key->key_offset;
346 uint64_t buflen = key->key_size;
347 uint8_t *digest = DigestBuf(buf, buflen, SHA1_DIGEST_ALGORITHM);
348 int i;
349 for (i = 0; i < SHA1_DIGEST_SIZE; i++) {
350 Uint8ToString(outbuf, digest[i]);
351 outbuf += 2;
352 }
353 *outbuf = '\0';
354 VbExFree(digest);
355 }
356
RecoveryReasonString(uint8_t code)357 const char *RecoveryReasonString(uint8_t code)
358 {
359 switch(code) {
360 case VBNV_RECOVERY_NOT_REQUESTED:
361 return "Recovery not requested";
362 case VBNV_RECOVERY_LEGACY:
363 return "Recovery requested from legacy utility";
364 case VBNV_RECOVERY_RO_MANUAL:
365 return "recovery button pressed";
366 case VBNV_RECOVERY_RO_INVALID_RW:
367 return "RW firmware failed signature check";
368 case VBNV_RECOVERY_RO_S3_RESUME:
369 return "S3 resume failed";
370 case VBNV_RECOVERY_DEP_RO_TPM_ERROR:
371 return "TPM error in read-only firmware";
372 case VBNV_RECOVERY_RO_SHARED_DATA:
373 return "Shared data error in read-only firmware";
374 case VBNV_RECOVERY_RO_TEST_S3:
375 return "Test error from S3Resume()";
376 case VBNV_RECOVERY_RO_TEST_LFS:
377 return "Test error from LoadFirmwareSetup()";
378 case VBNV_RECOVERY_RO_TEST_LF:
379 return "Test error from LoadFirmware()";
380 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN + VBSD_LF_CHECK_NOT_DONE:
381 return "RW firmware check not done";
382 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN + VBSD_LF_CHECK_DEV_MISMATCH:
383 return "RW firmware developer flag mismatch";
384 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN + VBSD_LF_CHECK_REC_MISMATCH:
385 return "RW firmware recovery flag mismatch";
386 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN +
387 VBSD_LF_CHECK_VERIFY_KEYBLOCK:
388 return "RW firmware unable to verify key block";
389 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN + VBSD_LF_CHECK_KEY_ROLLBACK:
390 return "RW firmware key version rollback detected";
391 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN +
392 VBSD_LF_CHECK_DATA_KEY_PARSE:
393 return "RW firmware unable to parse data key";
394 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN +
395 VBSD_LF_CHECK_VERIFY_PREAMBLE:
396 return "RW firmware unable to verify preamble";
397 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN + VBSD_LF_CHECK_FW_ROLLBACK:
398 return "RW firmware version rollback detected";
399 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN + VBSD_LF_CHECK_GET_FW_BODY:
400 return "RW firmware unable to get firmware body";
401 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN +
402 VBSD_LF_CHECK_HASH_WRONG_SIZE:
403 return "RW firmware hash is wrong size";
404 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN + VBSD_LF_CHECK_VERIFY_BODY:
405 return "RW firmware unable to verify firmware body";
406 case VBNV_RECOVERY_RO_INVALID_RW_CHECK_MIN + VBSD_LF_CHECK_NO_RO_NORMAL:
407 return "RW firmware read-only normal path is not supported";
408 case VBNV_RECOVERY_RO_FIRMWARE:
409 return "Firmware problem outside of verified boot";
410 case VBNV_RECOVERY_RO_TPM_REBOOT:
411 return "TPM requires a system reboot (should be transient)";
412 case VBNV_RECOVERY_EC_SOFTWARE_SYNC:
413 return "EC software sync error";
414 case VBNV_RECOVERY_EC_UNKNOWN_IMAGE:
415 return "EC software sync unable to determine active EC image";
416 case VBNV_RECOVERY_DEP_EC_HASH:
417 return "EC software sync error obtaining EC image hash";
418 case VBNV_RECOVERY_EC_EXPECTED_IMAGE:
419 return "EC software sync error "
420 "obtaining expected EC image from BIOS";
421 case VBNV_RECOVERY_EC_EXPECTED_HASH:
422 return "EC software sync error "
423 "obtaining expected EC hash from BIOS";
424 case VBNV_RECOVERY_EC_HASH_MISMATCH:
425 return "EC software sync error "
426 "comparing expected EC hash and image";
427 case VBNV_RECOVERY_EC_UPDATE:
428 return "EC software sync error updating EC";
429 case VBNV_RECOVERY_EC_JUMP_RW:
430 return "EC software sync unable to jump to EC-RW";
431 case VBNV_RECOVERY_EC_PROTECT:
432 return "EC software sync protection error";
433 case VBNV_RECOVERY_VB2_SECDATA_INIT:
434 return "Secure NVRAM (TPM) initialization error";
435 case VBNV_RECOVERY_VB2_GBB_HEADER:
436 return "Error parsing GBB header";
437 case VBNV_RECOVERY_VB2_TPM_CLEAR_OWNER:
438 return "Error trying to clear TPM owner";
439 case VBNV_RECOVERY_VB2_DEV_SWITCH:
440 return "Error reading or updating developer switch";
441 case VBNV_RECOVERY_VB2_FW_SLOT:
442 return "Error selecting RW firmware slot";
443 case VBNV_RECOVERY_RO_UNSPECIFIED:
444 return "Unspecified/unknown error in RO firmware";
445 case VBNV_RECOVERY_RW_DEV_SCREEN:
446 return "User requested recovery from dev-mode warning screen";
447 case VBNV_RECOVERY_RW_NO_OS:
448 return "No OS kernel detected (or kernel rollback attempt?)";
449 case VBNV_RECOVERY_RW_INVALID_OS:
450 return "OS kernel failed signature check";
451 case VBNV_RECOVERY_DEP_RW_TPM_ERROR:
452 return "TPM error in rewritable firmware";
453 case VBNV_RECOVERY_RW_DEV_MISMATCH:
454 return "RW firmware in dev mode, but dev switch is off";
455 case VBNV_RECOVERY_RW_SHARED_DATA:
456 return "Shared data error in rewritable firmware";
457 case VBNV_RECOVERY_RW_TEST_LK:
458 return "Test error from LoadKernel()";
459 case VBNV_RECOVERY_DEP_RW_NO_DISK:
460 return "No bootable disk found";
461 case VBNV_RECOVERY_TPM_E_FAIL:
462 return "TPM error that was not fixed by reboot";
463 case VBNV_RECOVERY_RO_TPM_S_ERROR:
464 return "TPM setup error in read-only firmware";
465 case VBNV_RECOVERY_RO_TPM_W_ERROR:
466 return "TPM write error in read-only firmware";
467 case VBNV_RECOVERY_RO_TPM_L_ERROR:
468 return "TPM lock error in read-only firmware";
469 case VBNV_RECOVERY_RO_TPM_U_ERROR:
470 return "TPM update error in read-only firmware";
471 case VBNV_RECOVERY_RW_TPM_R_ERROR:
472 return "TPM read error in rewritable firmware";
473 case VBNV_RECOVERY_RW_TPM_W_ERROR:
474 return "TPM write error in rewritable firmware";
475 case VBNV_RECOVERY_RW_TPM_L_ERROR:
476 return "TPM lock error in rewritable firmware";
477 case VBNV_RECOVERY_EC_HASH_FAILED:
478 return "EC software sync unable to get EC image hash";
479 case VBNV_RECOVERY_EC_HASH_SIZE:
480 return "EC software sync invalid image hash size";
481 case VBNV_RECOVERY_LK_UNSPECIFIED:
482 return "Unspecified error while trying to load kernel";
483 case VBNV_RECOVERY_RW_NO_DISK:
484 return "No bootable storage device in system";
485 case VBNV_RECOVERY_RW_NO_KERNEL:
486 return "No bootable kernel found on disk";
487 case VBNV_RECOVERY_RW_UNSPECIFIED:
488 return "Unspecified/unknown error in RW firmware";
489 case VBNV_RECOVERY_KE_DM_VERITY:
490 return "DM-verity error";
491 case VBNV_RECOVERY_KE_UNSPECIFIED:
492 return "Unspecified/unknown error in kernel";
493 case VBNV_RECOVERY_US_TEST:
494 return "Recovery mode test from user-mode";
495 case VBNV_RECOVERY_US_UNSPECIFIED:
496 return "Unspecified/unknown error in user-mode";
497 }
498 return "We have no idea what this means";
499 }
500
501 #define DEBUG_INFO_SIZE 512
502
VbDisplayDebugInfo(VbCommonParams * cparams,VbNvContext * vncptr)503 VbError_t VbDisplayDebugInfo(VbCommonParams *cparams, VbNvContext *vncptr)
504 {
505 VbSharedDataHeader *shared =
506 (VbSharedDataHeader *)cparams->shared_data_blob;
507 GoogleBinaryBlockHeader *gbb = cparams->gbb;
508 char buf[DEBUG_INFO_SIZE] = "";
509 char sha1sum[SHA1_DIGEST_SIZE * 2 + 1];
510 char hwid[256];
511 uint32_t used = 0;
512 VbPublicKey *key;
513 VbError_t ret;
514 uint32_t i;
515
516 /* Redisplay current screen to overwrite any previous debug output */
517 VbDisplayScreen(cparams, disp_current_screen, 1, vncptr);
518
519 /* Add hardware ID */
520 VbRegionReadHWID(cparams, hwid, sizeof(hwid));
521 used += StrnAppend(buf + used, "HWID: ", DEBUG_INFO_SIZE - used);
522 used += StrnAppend(buf + used, hwid, DEBUG_INFO_SIZE - used);
523
524 /* Add recovery reason and subcode */
525 VbNvGet(vncptr, VBNV_RECOVERY_SUBCODE, &i);
526 used += StrnAppend(buf + used,
527 "\nrecovery_reason: 0x", DEBUG_INFO_SIZE - used);
528 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used,
529 shared->recovery_reason, 16, 2);
530 used += StrnAppend(buf + used, " / 0x", DEBUG_INFO_SIZE - used);
531 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used, i, 16, 2);
532 used += StrnAppend(buf + used, " ", DEBUG_INFO_SIZE - used);
533 used += StrnAppend(buf + used,
534 RecoveryReasonString(shared->recovery_reason),
535 DEBUG_INFO_SIZE - used);
536
537 /* Add VbSharedData flags */
538 used += StrnAppend(buf + used, "\nVbSD.flags: 0x", DEBUG_INFO_SIZE - used);
539 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used,
540 shared->flags, 16, 8);
541
542 /* Add raw contents of VbNvStorage */
543 used += StrnAppend(buf + used, "\nVbNv.raw:", DEBUG_INFO_SIZE - used);
544 for (i = 0; i < VBNV_BLOCK_SIZE; i++) {
545 used += StrnAppend(buf + used, " ", DEBUG_INFO_SIZE - used);
546 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used,
547 vncptr->raw[i], 16, 2);
548 }
549
550 /* Add dev_boot_usb flag */
551 VbNvGet(vncptr, VBNV_DEV_BOOT_USB, &i);
552 used += StrnAppend(buf + used, "\ndev_boot_usb: ", DEBUG_INFO_SIZE - used);
553 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used, i, 10, 0);
554
555 /* Add dev_boot_legacy flag */
556 VbNvGet(vncptr, VBNV_DEV_BOOT_LEGACY, &i);
557 used += StrnAppend(buf + used,
558 "\ndev_boot_legacy: ", DEBUG_INFO_SIZE - used);
559 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used, i, 10, 0);
560
561 /* Add dev_boot_signed_only flag */
562 VbNvGet(vncptr, VBNV_DEV_BOOT_SIGNED_ONLY, &i);
563 used += StrnAppend(buf + used, "\ndev_boot_signed_only: ",
564 DEBUG_INFO_SIZE - used);
565 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used, i, 10, 0);
566
567 /* Add TPM versions */
568 used += StrnAppend(buf + used, "\nTPM: fwver=0x", DEBUG_INFO_SIZE - used);
569 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used,
570 shared->fw_version_tpm, 16, 8);
571 used += StrnAppend(buf + used, " kernver=0x", DEBUG_INFO_SIZE - used);
572 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used,
573 shared->kernel_version_tpm, 16, 8);
574
575 /* Add GBB flags */
576 used += StrnAppend(buf + used, "\ngbb.flags: 0x", DEBUG_INFO_SIZE - used);
577 if (gbb->major_version == GBB_MAJOR_VER && gbb->minor_version >= 1) {
578 used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used,
579 gbb->flags, 16, 8);
580 } else {
581 used += StrnAppend(buf + used,
582 "0 (default)", DEBUG_INFO_SIZE - used);
583 }
584
585 /* Add sha1sum for Root & Recovery keys */
586 ret = VbGbbReadRootKey(cparams, &key);
587 if (!ret) {
588 FillInSha1Sum(sha1sum, key);
589 VbExFree(key);
590 used += StrnAppend(buf + used, "\ngbb.rootkey: ",
591 DEBUG_INFO_SIZE - used);
592 used += StrnAppend(buf + used, sha1sum,
593 DEBUG_INFO_SIZE - used);
594 }
595
596 ret = VbGbbReadRecoveryKey(cparams, &key);
597 if (!ret) {
598 FillInSha1Sum(sha1sum, key);
599 VbExFree(key);
600 used += StrnAppend(buf + used, "\ngbb.recovery_key: ",
601 DEBUG_INFO_SIZE - used);
602 used += StrnAppend(buf + used, sha1sum,
603 DEBUG_INFO_SIZE - used);
604 }
605
606 /* If we're in dev-mode, show the kernel subkey that we expect, too. */
607 if (0 == shared->recovery_reason) {
608 FillInSha1Sum(sha1sum, &shared->kernel_subkey);
609 used += StrnAppend(buf + used,
610 "\nkernel_subkey: ", DEBUG_INFO_SIZE - used);
611 used += StrnAppend(buf + used, sha1sum, DEBUG_INFO_SIZE - used);
612 }
613
614 /* Make sure we finish with a newline */
615 used += StrnAppend(buf + used, "\n", DEBUG_INFO_SIZE - used);
616
617 /* TODO: add more interesting data:
618 * - Information on current disks */
619
620 buf[DEBUG_INFO_SIZE - 1] = '\0';
621 return VbExDisplayDebugInfo(buf);
622 }
623
624 #define MAGIC_WORD_LEN 5
625 #define MAGIC_WORD "xyzzy"
626 static uint8_t MagicBuffer[MAGIC_WORD_LEN];
627
VbCheckDisplayKey(VbCommonParams * cparams,uint32_t key,VbNvContext * vncptr)628 VbError_t VbCheckDisplayKey(VbCommonParams *cparams, uint32_t key,
629 VbNvContext *vncptr)
630 {
631 int i;
632
633 /* Update key buffer */
634 for(i = 1; i < MAGIC_WORD_LEN; i++)
635 MagicBuffer[i - 1] = MagicBuffer[i];
636 /* Save as lower-case ASCII */
637 MagicBuffer[MAGIC_WORD_LEN - 1] = (key | 0x20) & 0xFF;
638
639 if ('\t' == key) {
640 /* Tab = display debug info */
641 return VbDisplayDebugInfo(cparams, vncptr);
642 } else if (VB_KEY_LEFT == key || VB_KEY_RIGHT == key ||
643 VB_KEY_DOWN == key || VB_KEY_UP == key) {
644 /* Arrow keys = change localization */
645 uint32_t loc = 0;
646 uint32_t count = 0;
647
648 VbNvGet(vncptr, VBNV_LOCALIZATION_INDEX, &loc);
649 if (VBERROR_SUCCESS != VbGetLocalizationCount(cparams, &count))
650 loc = 0; /* No localization count (bad GBB?) */
651 else if (VB_KEY_RIGHT == key || VB_KEY_UP == key)
652 loc = (loc < count - 1 ? loc + 1 : 0);
653 else
654 loc = (loc > 0 ? loc - 1 : count - 1);
655 VBDEBUG(("VbCheckDisplayKey() - change localization to %d\n",
656 (int)loc));
657 VbNvSet(vncptr, VBNV_LOCALIZATION_INDEX, loc);
658 VbNvSet(vncptr, VBNV_BACKUP_NVRAM_REQUEST, 1);
659
660 #ifdef SAVE_LOCALE_IMMEDIATELY
661 VbNvTeardown(vncptr); /* really only computes checksum */
662 if (vncptr->raw_changed)
663 VbExNvStorageWrite(vncptr->raw);
664 #endif
665
666 /* Force redraw of current screen */
667 return VbDisplayScreen(cparams, disp_current_screen, 1, vncptr);
668 }
669
670 if (0 == Memcmp(MagicBuffer, MAGIC_WORD, MAGIC_WORD_LEN)) {
671 if (VBEASTEREGG)
672 (void)VbDisplayScreen(cparams, disp_current_screen,
673 1, vncptr);
674 }
675
676 return VBERROR_SUCCESS;
677 }
678