1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>LCOV - skiboot.info - libstb/secvar/storage/secboot_tpm.c</title>
<link rel="stylesheet" type="text/css" href="../../../gcov.css">
</head>
<body>
<table width="100%" border=0 cellspacing=0 cellpadding=0>
<tr><td class="title">LCOV - code coverage report</td></tr>
<tr><td class="ruler"><img src="../../../glass.png" width=3 height=3 alt=""></td></tr>
<tr>
<td width="100%">
<table cellpadding=1 border=0 width="100%">
<tr>
<td width="10%" class="headerItem">Current view:</td>
<td width="35%" class="headerValue"><a href="../../../index.html">top level</a> - <a href="index.html">libstb/secvar/storage</a> - secboot_tpm.c<span style="font-size: 80%;"> (source / <a href="secboot_tpm.c.func-sort-c.html">functions</a>)</span></td>
<td width="5%"></td>
<td width="15%"></td>
<td width="10%" class="headerCovTableHead">Hit</td>
<td width="10%" class="headerCovTableHead">Total</td>
<td width="15%" class="headerCovTableHead">Coverage</td>
</tr>
<tr>
<td class="headerItem">Test:</td>
<td class="headerValue">skiboot.info</td>
<td></td>
<td class="headerItem">Lines:</td>
<td class="headerCovTableEntry">162</td>
<td class="headerCovTableEntry">357</td>
<td class="headerCovTableEntryLo">45.4 %</td>
</tr>
<tr>
<td class="headerItem">Date:</td>
<td class="headerValue">2023-06-06 19:00:36</td>
<td></td>
<td class="headerItem">Functions:</td>
<td class="headerCovTableEntry">13</td>
<td class="headerCovTableEntry">19</td>
<td class="headerCovTableEntryLo">68.4 %</td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td class="headerItem">Branches:</td>
<td class="headerCovTableEntry">0</td>
<td class="headerCovTableEntry">0</td>
<td class="headerCovTableEntryHi">-</td>
</tr>
<tr><td><img src="../../../glass.png" width=3 height=3 alt=""></td></tr>
</table>
</td>
</tr>
<tr><td class="ruler"><img src="../../../glass.png" width=3 height=3 alt=""></td></tr>
</table>
<table cellpadding=0 cellspacing=0 border=0>
<tr>
<td><br></td>
</tr>
<tr>
<td>
<pre class="sourceHeading"> Branch data Line data Source code</pre>
<pre class="source">
<a name="1"><span class="lineNum"> 1 </span> : : // SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later</a>
<a name="2"><span class="lineNum"> 2 </span> : : /* Copyright 2020 IBM Corp. */</a>
<a name="3"><span class="lineNum"> 3 </span> : : #ifndef pr_fmt</a>
<a name="4"><span class="lineNum"> 4 </span> : : #define pr_fmt(fmt) "SECBOOT_TPM: " fmt</a>
<a name="5"><span class="lineNum"> 5 </span> : : #endif</a>
<a name="6"><span class="lineNum"> 6 </span> : : </a>
<a name="7"><span class="lineNum"> 7 </span> : : #include <stdlib.h></a>
<a name="8"><span class="lineNum"> 8 </span> : : #include <skiboot.h></a>
<a name="9"><span class="lineNum"> 9 </span> : : #include <opal.h></a>
<a name="10"><span class="lineNum"> 10 </span> : : #include <mbedtls/sha256.h></a>
<a name="11"><span class="lineNum"> 11 </span> : : #include "../secvar.h"</a>
<a name="12"><span class="lineNum"> 12 </span> : : #include "../secvar_devtree.h"</a>
<a name="13"><span class="lineNum"> 13 </span> : : #include "secboot_tpm.h"</a>
<a name="14"><span class="lineNum"> 14 </span> : : #include <tssskiboot.h></a>
<a name="15"><span class="lineNum"> 15 </span> : : #include <ibmtss/TPM_Types.h></a>
<a name="16"><span class="lineNum"> 16 </span> : : </a>
<a name="17"><span class="lineNum"> 17 </span> : : #define CYCLE_BIT(b) (b^0x1)</a>
<a name="18"><span class="lineNum"> 18 </span> : : </a>
<a name="19"><span class="lineNum"> 19 </span> : : #define SECBOOT_TPM_MAX_VAR_SIZE 8192</a>
<a name="20"><span class="lineNum"> 20 </span> : : </a>
<a name="21"><span class="lineNum"> 21 </span> : : struct secboot *secboot_image = NULL;</a>
<a name="22"><span class="lineNum"> 22 </span> : : struct tpmnv_vars *tpmnv_vars_image = NULL;</a>
<a name="23"><span class="lineNum"> 23 </span> : : struct tpmnv_control *tpmnv_control_image = NULL;</a>
<a name="24"><span class="lineNum"> 24 </span> : : </a>
<a name="25"><span class="lineNum"> 25 </span> : : const size_t tpmnv_vars_size = 2048;</a>
<a name="26"><span class="lineNum"> 26 </span> : : </a>
<a name="27"><span class="lineNum"> 27 </span> : : /* Expected TPM NV index name field from NV_ReadPublic given our known</a>
<a name="28"><span class="lineNum"> 28 </span> : : * set of attributes (see tss_nv_define_space).</a>
<a name="29"><span class="lineNum"> 29 </span> : : * See Part 1 Section 16, and Part 2 Section 13.5 of the TPM Specification</a>
<a name="30"><span class="lineNum"> 30 </span> : : * for how this is calculated</a>
<a name="31"><span class="lineNum"> 31 </span> : : *</a>
<a name="32"><span class="lineNum"> 32 </span> : : * These hashes are calculated and checked BEFORE TPM2_NV_WriteLock is called,</a>
<a name="33"><span class="lineNum"> 33 </span> : : * which alters the hash slightly as it sets TPMA_NV_WRITELOCKED</a>
<a name="34"><span class="lineNum"> 34 </span> : : */</a>
<a name="35"><span class="lineNum"> 35 </span> : : const uint8_t tpmnv_vars_name[] = {</a>
<a name="36"><span class="lineNum"> 36 </span> : : 0x00, 0x0b, 0x7a, 0xdb, 0x70, 0xdd, 0x27, 0x94, 0x93, 0x26, 0x11, 0xe2, 0x97,</a>
<a name="37"><span class="lineNum"> 37 </span> : : 0x00, 0x77, 0x22, 0x4d, 0x5a, 0x74, 0xf8, 0x91, 0x6f, 0xbf, 0xf8, 0x51, 0x4a,</a>
<a name="38"><span class="lineNum"> 38 </span> : : 0x67, 0x6f, 0xd9, 0xa8, 0xc3, 0xfc, 0x39, 0xed,</a>
<a name="39"><span class="lineNum"> 39 </span> : : };</a>
<a name="40"><span class="lineNum"> 40 </span> : : </a>
<a name="41"><span class="lineNum"> 41 </span> : : const uint8_t tpmnv_control_name[] = {</a>
<a name="42"><span class="lineNum"> 42 </span> : : 0x00, 0x0b, 0xad, 0x47, 0x6b, 0xa5, 0xdf, 0xb1, 0xe2, 0x18, 0x50, 0xf6, 0x05,</a>
<a name="43"><span class="lineNum"> 43 </span> : : 0x67, 0xe8, 0x8b, 0xa9, 0x0f, 0x86, 0x1f, 0x06, 0xab, 0x43, 0x96, 0x7f, 0x6e,</a>
<a name="44"><span class="lineNum"> 44 </span> : : 0x85, 0x33, 0x5b, 0xa6, 0xf0, 0x63, 0x73, 0xd0,</a>
<a name="45"><span class="lineNum"> 45 </span> : : };</a>
<a name="46"><span class="lineNum"> 46 </span> : : </a>
<a name="47"><span class="lineNum"> 47 </span> : : const uint8_t tpmnv_vars_prov_name[] = {</a>
<a name="48"><span class="lineNum"> 48 </span> : : 0x00, 0x0b, 0x58, 0x36, 0x2c, 0xbf, 0xec, 0x0e, 0xcc, 0xbf, 0xa9, 0x41, 0x94,</a>
<a name="49"><span class="lineNum"> 49 </span> : : 0xe9, 0x95, 0xe8, 0x3b, 0xd7, 0x8b, 0x52, 0xac, 0x61, 0x6f, 0xe6, 0x42, 0x93,</a>
<a name="50"><span class="lineNum"> 50 </span> : : 0xbb, 0x5a, 0x79, 0x9f, 0xcc, 0x60, 0x5e, 0x8d,</a>
<a name="51"><span class="lineNum"> 51 </span> : : };</a>
<a name="52"><span class="lineNum"> 52 </span> : : </a>
<a name="53"><span class="lineNum"> 53 </span> : : const uint8_t tpmnv_control_prov_name[] = {</a>
<a name="54"><span class="lineNum"> 54 </span> : : 0x00, 0x0b, 0x7b, 0xd6, 0x02, 0xac, 0xf5, 0x34, 0x54, 0x5c, 0x3e, 0xda, 0xe5,</a>
<a name="55"><span class="lineNum"> 55 </span> : : 0xb2, 0xe4, 0x93, 0x4f, 0x36, 0xfb, 0x7f, 0xea, 0xbe, 0xfa, 0x3c, 0xfe, 0xed,</a>
<a name="56"><span class="lineNum"> 56 </span> : : 0x6a, 0x12, 0xfb, 0xc8, 0xf7, 0x92, 0x0e, 0xd3,</a>
<a name="57"><span class="lineNum"> 57 </span> : : };</a>
<a name="58"><span class="lineNum"> 58 </span> : : </a>
<a name="59"><span class="lineNum"> 59 </span> : : /* Calculate a SHA256 hash over the supplied buffer */</a>
<a name="60"><span class="lineNum"> 60 </span> :<span class="lineCov"> 3 : static int calc_bank_hash(char *target_hash, const char *source_buf, uint64_t size)</span></a>
<a name="61"><span class="lineNum"> 61 </span> : : {</a>
<a name="62"><span class="lineNum"> 62 </span> : : mbedtls_sha256_context ctx;</a>
<a name="63"><span class="lineNum"> 63 </span> : : int rc;</a>
<a name="64"><span class="lineNum"> 64 </span> : : </a>
<a name="65"><span class="lineNum"> 65 </span> :<span class="lineCov"> 3 : mbedtls_sha256_init(&ctx);</span></a>
<a name="66"><span class="lineNum"> 66 </span> : : </a>
<a name="67"><span class="lineNum"> 67 </span> :<span class="lineCov"> 3 : rc = mbedtls_sha256_update_ret(&ctx, source_buf, size);</span></a>
<a name="68"><span class="lineNum"> 68 </span> :<span class="lineCov"> 3 : if (rc)</span></a>
<a name="69"><span class="lineNum"> 69 </span> :<span class="lineNoCov"> 0 : goto out;</span></a>
<a name="70"><span class="lineNum"> 70 </span> : : </a>
<a name="71"><span class="lineNum"> 71 </span> :<span class="lineCov"> 3 : mbedtls_sha256_finish_ret(&ctx, target_hash);</span></a>
<a name="72"><span class="lineNum"> 72 </span> :<span class="lineCov"> 3 : if (rc)</span></a>
<a name="73"><span class="lineNum"> 73 </span> :<span class="lineNoCov"> 0 : goto out;</span></a>
<a name="74"><span class="lineNum"> 74 </span> : : </a>
<a name="75"><span class="lineNum"> 75 </span> :<span class="lineCov"> 3 : out:</span></a>
<a name="76"><span class="lineNum"> 76 </span> :<span class="lineCov"> 3 : mbedtls_sha256_free(&ctx);</span></a>
<a name="77"><span class="lineNum"> 77 </span> :<span class="lineCov"> 3 : return rc;</span></a>
<a name="78"><span class="lineNum"> 78 </span> : : }</a>
<a name="79"><span class="lineNum"> 79 </span> : : </a>
<a name="80"><span class="lineNum"> 80 </span> : : /* Reformat the TPMNV space */</a>
<a name="81"><span class="lineNum"> 81 </span> :<span class="lineCov"> 1 : static int tpmnv_format(void)</span></a>
<a name="82"><span class="lineNum"> 82 </span> : : {</a>
<a name="83"><span class="lineNum"> 83 </span> : : int rc;</a>
<a name="84"><span class="lineNum"> 84 </span> : : </a>
<a name="85"><span class="lineNum"> 85 </span> :<span class="lineCov"> 1 : memset(tpmnv_vars_image, 0x00, tpmnv_vars_size);</span></a>
<a name="86"><span class="lineNum"> 86 </span> :<span class="lineCov"> 1 : memset(tpmnv_control_image, 0x00, sizeof(struct tpmnv_control));</span></a>
<a name="87"><span class="lineNum"> 87 </span> : : </a>
<a name="88"><span class="lineNum"> 88 </span> :<span class="lineCov"> 1 : tpmnv_vars_image->header.magic_number = SECBOOT_MAGIC_NUMBER;</span></a>
<a name="89"><span class="lineNum"> 89 </span> :<span class="lineCov"> 1 : tpmnv_vars_image->header.version = SECBOOT_VERSION;</span></a>
<a name="90"><span class="lineNum"> 90 </span> :<span class="lineCov"> 1 : tpmnv_control_image->header.magic_number = SECBOOT_MAGIC_NUMBER;</span></a>
<a name="91"><span class="lineNum"> 91 </span> :<span class="lineCov"> 1 : tpmnv_control_image->header.version = SECBOOT_VERSION;</span></a>
<a name="92"><span class="lineNum"> 92 </span> : : </a>
<a name="93"><span class="lineNum"> 93 </span> : : /* Counts as first write to the TPM NV, which sets the</a>
<a name="94"><span class="lineNum"> 94 </span> : : * TPMA_NVA_WRITTEN attribute */</a>
<a name="95"><span class="lineNum"> 95 </span> :<span class="lineCov"> 1 : rc = tpmnv_ops.write(SECBOOT_TPMNV_VARS_INDEX,</span></a>
<a name="96"><span class="lineNum"> 96 </span> : : tpmnv_vars_image,</a>
<a name="97"><span class="lineNum"> 97 </span> : : tpmnv_vars_size, 0);</a>
<a name="98"><span class="lineNum"> 98 </span> :<span class="lineCov"> 1 : if (rc) {</span></a>
<a name="99"><span class="lineNum"> 99 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Could not write new formatted data to VARS index, rc=%d\n", rc);</span></a>
<a name="100"><span class="lineNum"> 100 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="101"><span class="lineNum"> 101 </span> : : }</a>
<a name="102"><span class="lineNum"> 102 </span> : : </a>
<a name="103"><span class="lineNum"> 103 </span> :<span class="lineCov"> 1 : rc = tpmnv_ops.write(SECBOOT_TPMNV_CONTROL_INDEX,</span></a>
<a name="104"><span class="lineNum"> 104 </span> : : tpmnv_control_image,</a>
<a name="105"><span class="lineNum"> 105 </span> : : sizeof(struct tpmnv_control), 0);</a>
<a name="106"><span class="lineNum"> 106 </span> :<span class="lineCov"> 1 : if (rc)</span></a>
<a name="107"><span class="lineNum"> 107 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Could not write new formatted data to CONTROL index, rc=%d\n", rc);</span></a>
<a name="108"><span class="lineNum"> 108 </span> : : </a>
<a name="109"><span class="lineNum"> 109 </span> :<span class="lineCov"> 1 : return rc;</span></a>
<a name="110"><span class="lineNum"> 110 </span> : : }</a>
<a name="111"><span class="lineNum"> 111 </span> : : </a>
<a name="112"><span class="lineNum"> 112 </span> : : /* Reformat the secboot PNOR space */</a>
<a name="113"><span class="lineNum"> 113 </span> :<span class="lineCov"> 1 : static int secboot_format(void)</span></a>
<a name="114"><span class="lineNum"> 114 </span> : : {</a>
<a name="115"><span class="lineNum"> 115 </span> : : int rc;</a>
<a name="116"><span class="lineNum"> 116 </span> : : </a>
<a name="117"><span class="lineNum"> 117 </span> :<span class="lineCov"> 1 : memset(secboot_image, 0x00, sizeof(struct secboot));</span></a>
<a name="118"><span class="lineNum"> 118 </span> : : </a>
<a name="119"><span class="lineNum"> 119 </span> :<span class="lineCov"> 1 : secboot_image->header.magic_number = SECBOOT_MAGIC_NUMBER;</span></a>
<a name="120"><span class="lineNum"> 120 </span> :<span class="lineCov"> 1 : secboot_image->header.version = SECBOOT_VERSION;</span></a>
<a name="121"><span class="lineNum"> 121 </span> : : </a>
<a name="122"><span class="lineNum"> 122 </span> : : /* Write the hash of the empty bank to the tpm so future loads work */</a>
<a name="123"><span class="lineNum"> 123 </span> :<span class="lineCov"> 1 : rc = calc_bank_hash(tpmnv_control_image->bank_hash[0],</span></a>
<a name="124"><span class="lineNum"> 124 </span> :<span class="lineCov"> 1 : secboot_image->bank[0],</span></a>
<a name="125"><span class="lineNum"> 125 </span> : : SECBOOT_VARIABLE_BANK_SIZE);</a>
<a name="126"><span class="lineNum"> 126 </span> :<span class="lineCov"> 1 : if (rc) {</span></a>
<a name="127"><span class="lineNum"> 127 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Bank hash failed to calculate somehow\n");</span></a>
<a name="128"><span class="lineNum"> 128 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="129"><span class="lineNum"> 129 </span> : : }</a>
<a name="130"><span class="lineNum"> 130 </span> : : /* Clear bank_hash[1] anyway, to match initial zeroed bank hash state */</a>
<a name="131"><span class="lineNum"> 131 </span> :<span class="lineCov"> 1 : memset(tpmnv_control_image->bank_hash[1], 0x00, sizeof(tpmnv_control_image->bank_hash[1]));</span></a>
<a name="132"><span class="lineNum"> 132 </span> : : </a>
<a name="133"><span class="lineNum"> 133 </span> :<span class="lineCov"> 1 : tpmnv_control_image->active_bit = 0;</span></a>
<a name="134"><span class="lineNum"> 134 </span> : : </a>
<a name="135"><span class="lineNum"> 135 </span> :<span class="lineCov"> 1 : rc = tpmnv_ops.write(SECBOOT_TPMNV_CONTROL_INDEX,</span></a>
<a name="136"><span class="lineNum"> 136 </span> : : tpmnv_control_image,</a>
<a name="137"><span class="lineNum"> 137 </span> : : sizeof(struct tpmnv_control),</a>
<a name="138"><span class="lineNum"> 138 </span> : : 0);</a>
<a name="139"><span class="lineNum"> 139 </span> :<span class="lineCov"> 1 : if (rc) {</span></a>
<a name="140"><span class="lineNum"> 140 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Could not write fresh formatted bank hashes to CONTROL index, rc=%d\n", rc);</span></a>
<a name="141"><span class="lineNum"> 141 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="142"><span class="lineNum"> 142 </span> : : }</a>
<a name="143"><span class="lineNum"> 143 </span> : : </a>
<a name="144"><span class="lineNum"> 144 </span> :<span class="lineCov"> 1 : rc = flash_secboot_write(0, secboot_image, sizeof(struct secboot));</span></a>
<a name="145"><span class="lineNum"> 145 </span> :<span class="lineCov"> 1 : if (rc)</span></a>
<a name="146"><span class="lineNum"> 146 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Could not write formatted data to PNOR, rc=%d\n", rc);</span></a>
<a name="147"><span class="lineNum"> 147 </span> : : </a>
<a name="148"><span class="lineNum"> 148 </span> :<span class="lineCov"> 1 : return rc;</span></a>
<a name="149"><span class="lineNum"> 149 </span> : : }</a>
<a name="150"><span class="lineNum"> 150 </span> : : </a>
<a name="151"><span class="lineNum"> 151 </span> : : </a>
<a name="152"><span class="lineNum"> 152 </span> : : /*</a>
<a name="153"><span class="lineNum"> 153 </span> : : * Serialize one variable to a target memory location.</a>
<a name="154"><span class="lineNum"> 154 </span> : : * Returns the advanced target pointer,</a>
<a name="155"><span class="lineNum"> 155 </span> : : * NULL if advanced pointer would exceed the supplied bound</a>
<a name="156"><span class="lineNum"> 156 </span> : : */</a>
<a name="157"><span class="lineNum"> 157 </span> :<span class="lineCov"> 8 : static char *secboot_serialize_secvar(char *target, const struct secvar *var, const char *end)</span></a>
<a name="158"><span class="lineNum"> 158 </span> : : {</a>
<a name="159"><span class="lineNum"> 159 </span> :<span class="lineCov"> 8 : if ((target + sizeof(uint64_t) + sizeof(uint64_t)</span></a>
<a name="160"><span class="lineNum"> 160 </span> :<span class="lineCov"> 8 : + var->key_len + var->data_size) > end)</span></a>
<a name="161"><span class="lineNum"> 161 </span> :<span class="lineNoCov"> 0 : return NULL;</span></a>
<a name="162"><span class="lineNum"> 162 </span> : : </a>
<a name="163"><span class="lineNum"> 163 </span> :<span class="lineCov"> 8 : *((uint64_t*) target) = cpu_to_be64(var->key_len);</span></a>
<a name="164"><span class="lineNum"> 164 </span> :<span class="lineCov"> 8 : target += sizeof(var->key_len);</span></a>
<a name="165"><span class="lineNum"> 165 </span> :<span class="lineCov"> 8 : *((uint64_t*) target) = cpu_to_be64(var->data_size);</span></a>
<a name="166"><span class="lineNum"> 166 </span> :<span class="lineCov"> 8 : target += sizeof(var->data_size);</span></a>
<a name="167"><span class="lineNum"> 167 </span> :<span class="lineCov"> 8 : memcpy(target, var->key, var->key_len);</span></a>
<a name="168"><span class="lineNum"> 168 </span> :<span class="lineCov"> 8 : target += var->key_len;</span></a>
<a name="169"><span class="lineNum"> 169 </span> :<span class="lineCov"> 8 : memcpy(target, var->data, var->data_size);</span></a>
<a name="170"><span class="lineNum"> 170 </span> :<span class="lineCov"> 8 : target += var->data_size;</span></a>
<a name="171"><span class="lineNum"> 171 </span> : : </a>
<a name="172"><span class="lineNum"> 172 </span> :<span class="lineCov"> 8 : return target;</span></a>
<a name="173"><span class="lineNum"> 173 </span> : : }</a>
<a name="174"><span class="lineNum"> 174 </span> : : </a>
<a name="175"><span class="lineNum"> 175 </span> : : </a>
<a name="176"><span class="lineNum"> 176 </span> : : /* Flattens a linked-list bank into a contiguous buffer for writing */</a>
<a name="177"><span class="lineNum"> 177 </span> :<span class="lineCov"> 4 : static int secboot_serialize_bank(const struct list_head *bank, char *target,</span></a>
<a name="178"><span class="lineNum"> 178 </span> : : size_t target_size, int flags)</a>
<a name="179"><span class="lineNum"> 179 </span> : : {</a>
<a name="180"><span class="lineNum"> 180 </span> : : struct secvar *var;</a>
<a name="181"><span class="lineNum"> 181 </span> :<span class="lineCov"> 4 : char *end = target + target_size;</span></a>
<a name="182"><span class="lineNum"> 182 </span> : : </a>
<a name="183"><span class="lineNum"> 183 </span> :<span class="lineCov"> 4 : assert(bank);</span></a>
<a name="184"><span class="lineNum"> 184 </span> :<span class="lineCov"> 4 : assert(target);</span></a>
<a name="185"><span class="lineNum"> 185 </span> : : </a>
<a name="186"><span class="lineNum"> 186 </span> :<span class="lineCov"> 4 : memset(target, 0x00, target_size);</span></a>
<a name="187"><span class="lineNum"> 187 </span> : : </a>
<a name="188"><span class="lineNum"> 188 </span> :<span class="lineCov"> 20 : list_for_each(bank, var, link) {</span></a>
<a name="189"><span class="lineNum"> 189 </span> :<span class="lineCov"> 16 : if (var->flags != flags)</span></a>
<a name="190"><span class="lineNum"> 190 </span> :<span class="lineCov"> 8 : continue;</span></a>
<a name="191"><span class="lineNum"> 191 </span> : : </a>
<a name="192"><span class="lineNum"> 192 </span> :<span class="lineCov"> 8 : target = secboot_serialize_secvar(target, var, end);</span></a>
<a name="193"><span class="lineNum"> 193 </span> :<span class="lineCov"> 8 : if (!target) {</span></a>
<a name="194"><span class="lineNum"> 194 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Ran out of %s space, giving up!",</span></a>
<a name="195"><span class="lineNum"> 195 </span> : : (flags & SECVAR_FLAG_PROTECTED) ? "TPMNV" : "PNOR");</a>
<a name="196"><span class="lineNum"> 196 </span> :<span class="lineNoCov"> 0 : return OPAL_EMPTY;</span></a>
<a name="197"><span class="lineNum"> 197 </span> : : }</a>
<a name="198"><span class="lineNum"> 198 </span> : : }</a>
<a name="199"><span class="lineNum"> 199 </span> : : </a>
<a name="200"><span class="lineNum"> 200 </span> :<span class="lineCov"> 4 : return OPAL_SUCCESS;</span></a>
<a name="201"><span class="lineNum"> 201 </span> : : }</a>
<a name="202"><span class="lineNum"> 202 </span> : : </a>
<a name="203"><span class="lineNum"> 203 </span> : : /* Helper for the variable-bank specific writing logic */</a>
<a name="204"><span class="lineNum"> 204 </span> :<span class="lineCov"> 2 : static int secboot_tpm_write_variable_bank(const struct list_head *bank)</span></a>
<a name="205"><span class="lineNum"> 205 </span> : : {</a>
<a name="206"><span class="lineNum"> 206 </span> : : int rc;</a>
<a name="207"><span class="lineNum"> 207 </span> : : uint64_t bit;</a>
<a name="208"><span class="lineNum"> 208 </span> : : </a>
<a name="209"><span class="lineNum"> 209 </span> :<span class="lineCov"> 2 : bit = CYCLE_BIT(tpmnv_control_image->active_bit);</span></a>
<a name="210"><span class="lineNum"> 210 </span> : : /* Serialize TPMNV variables */</a>
<a name="211"><span class="lineNum"> 211 </span> :<span class="lineCov"> 2 : rc = secboot_serialize_bank(bank, tpmnv_vars_image->vars, tpmnv_vars_size - sizeof(struct tpmnv_vars), SECVAR_FLAG_PROTECTED);</span></a>
<a name="212"><span class="lineNum"> 212 </span> :<span class="lineCov"> 2 : if (rc)</span></a>
<a name="213"><span class="lineNum"> 213 </span> :<span class="lineNoCov"> 0 : goto out;</span></a>
<a name="214"><span class="lineNum"> 214 </span> : : </a>
<a name="215"><span class="lineNum"> 215 </span> : : </a>
<a name="216"><span class="lineNum"> 216 </span> : : /* Write TPMNV variables to actual NV */</a>
<a name="217"><span class="lineNum"> 217 </span> :<span class="lineCov"> 2 : rc = tpmnv_ops.write(SECBOOT_TPMNV_VARS_INDEX, tpmnv_vars_image, tpmnv_vars_size, 0);</span></a>
<a name="218"><span class="lineNum"> 218 </span> :<span class="lineCov"> 2 : if (rc)</span></a>
<a name="219"><span class="lineNum"> 219 </span> :<span class="lineNoCov"> 0 : goto out;</span></a>
<a name="220"><span class="lineNum"> 220 </span> : : </a>
<a name="221"><span class="lineNum"> 221 </span> : : /* Serialize the PNOR variables, but don't write to flash until after the bank hash */</a>
<a name="222"><span class="lineNum"> 222 </span> :<span class="lineCov"> 2 : rc = secboot_serialize_bank(bank, secboot_image->bank[bit], SECBOOT_VARIABLE_BANK_SIZE, 0);</span></a>
<a name="223"><span class="lineNum"> 223 </span> :<span class="lineCov"> 2 : if (rc)</span></a>
<a name="224"><span class="lineNum"> 224 </span> :<span class="lineNoCov"> 0 : goto out;</span></a>
<a name="225"><span class="lineNum"> 225 </span> : : </a>
<a name="226"><span class="lineNum"> 226 </span> : : /* Calculate the bank hash, and write to TPM NV */</a>
<a name="227"><span class="lineNum"> 227 </span> :<span class="lineCov"> 2 : rc = calc_bank_hash(tpmnv_control_image->bank_hash[bit], secboot_image->bank[bit], SECBOOT_VARIABLE_BANK_SIZE);</span></a>
<a name="228"><span class="lineNum"> 228 </span> :<span class="lineCov"> 2 : if (rc)</span></a>
<a name="229"><span class="lineNum"> 229 </span> :<span class="lineNoCov"> 0 : goto out;</span></a>
<a name="230"><span class="lineNum"> 230 </span> : : </a>
<a name="231"><span class="lineNum"> 231 </span> :<span class="lineCov"> 2 : rc = tpmnv_ops.write(SECBOOT_TPMNV_CONTROL_INDEX, tpmnv_control_image->bank_hash[bit],</span></a>
<a name="232"><span class="lineNum"> 232 </span> : : SHA256_DIGEST_LENGTH, offsetof(struct tpmnv_control, bank_hash[bit]));</a>
<a name="233"><span class="lineNum"> 233 </span> :<span class="lineCov"> 2 : if (rc)</span></a>
<a name="234"><span class="lineNum"> 234 </span> :<span class="lineNoCov"> 0 : goto out;</span></a>
<a name="235"><span class="lineNum"> 235 </span> : : </a>
<a name="236"><span class="lineNum"> 236 </span> : : /* Write new variable bank to pnor */</a>
<a name="237"><span class="lineNum"> 237 </span> :<span class="lineCov"> 2 : rc = flash_secboot_write(0, secboot_image, sizeof(struct secboot));</span></a>
<a name="238"><span class="lineNum"> 238 </span> :<span class="lineCov"> 2 : if (rc)</span></a>
<a name="239"><span class="lineNum"> 239 </span> :<span class="lineNoCov"> 0 : goto out;</span></a>
<a name="240"><span class="lineNum"> 240 </span> : : </a>
<a name="241"><span class="lineNum"> 241 </span> : : /* Flip the bit, and write to TPM NV */</a>
<a name="242"><span class="lineNum"> 242 </span> :<span class="lineCov"> 2 : tpmnv_control_image->active_bit = bit;</span></a>
<a name="243"><span class="lineNum"> 243 </span> :<span class="lineCov"> 2 : rc = tpmnv_ops.write(SECBOOT_TPMNV_CONTROL_INDEX,</span></a>
<a name="244"><span class="lineNum"> 244 </span> :<span class="lineCov"> 2 : &tpmnv_control_image->active_bit,</span></a>
<a name="245"><span class="lineNum"> 245 </span> : : sizeof(tpmnv_control_image->active_bit),</a>
<a name="246"><span class="lineNum"> 246 </span> : : offsetof(struct tpmnv_control, active_bit));</a>
<a name="247"><span class="lineNum"> 247 </span> :<span class="lineCov"> 2 : out:</span></a>
<a name="248"><span class="lineNum"> 248 </span> : : </a>
<a name="249"><span class="lineNum"> 249 </span> :<span class="lineCov"> 2 : return rc;</span></a>
<a name="250"><span class="lineNum"> 250 </span> : : }</a>
<a name="251"><span class="lineNum"> 251 </span> : : </a>
<a name="252"><span class="lineNum"> 252 </span> :<span class="lineCov"> 2 : static int secboot_tpm_write_bank(struct list_head *bank, int section)</span></a>
<a name="253"><span class="lineNum"> 253 </span> : : {</a>
<a name="254"><span class="lineNum"> 254 </span> : : int rc;</a>
<a name="255"><span class="lineNum"> 255 </span> : : </a>
<a name="256"><span class="lineNum"> 256 </span> :<span class="lineCov"> 2 : switch (section) {</span></a>
<a name="257"><span class="lineNum"> 257 </span> :<span class="lineCov"> 2 : case SECVAR_VARIABLE_BANK:</span></a>
<a name="258"><span class="lineNum"> 258 </span> :<span class="lineCov"> 2 : rc = secboot_tpm_write_variable_bank(bank);</span></a>
<a name="259"><span class="lineNum"> 259 </span> :<span class="lineCov"> 2 : break;</span></a>
<a name="260"><span class="lineNum"> 260 </span> :<span class="lineNoCov"> 0 : case SECVAR_UPDATE_BANK:</span></a>
<a name="261"><span class="lineNum"> 261 </span> :<span class="lineNoCov"> 0 : memset(secboot_image->update, 0, SECBOOT_UPDATE_BANK_SIZE);</span></a>
<a name="262"><span class="lineNum"> 262 </span> :<span class="lineNoCov"> 0 : rc = secboot_serialize_bank(bank, secboot_image->update,</span></a>
<a name="263"><span class="lineNum"> 263 </span> : : SECBOOT_UPDATE_BANK_SIZE, 0);</a>
<a name="264"><span class="lineNum"> 264 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="265"><span class="lineNum"> 265 </span> :<span class="lineNoCov"> 0 : break;</span></a>
<a name="266"><span class="lineNum"> 266 </span> : : </a>
<a name="267"><span class="lineNum"> 267 </span> :<span class="lineNoCov"> 0 : rc = flash_secboot_write(0, secboot_image,</span></a>
<a name="268"><span class="lineNum"> 268 </span> : : sizeof(struct secboot));</a>
<a name="269"><span class="lineNum"> 269 </span> :<span class="lineNoCov"> 0 : break;</span></a>
<a name="270"><span class="lineNum"> 270 </span> :<span class="lineNoCov"> 0 : default:</span></a>
<a name="271"><span class="lineNum"> 271 </span> :<span class="lineNoCov"> 0 : rc = OPAL_HARDWARE;</span></a>
<a name="272"><span class="lineNum"> 272 </span> : : }</a>
<a name="273"><span class="lineNum"> 273 </span> : : </a>
<a name="274"><span class="lineNum"> 274 </span> :<span class="lineCov"> 2 : return rc;</span></a>
<a name="275"><span class="lineNum"> 275 </span> : : }</a>
<a name="276"><span class="lineNum"> 276 </span> : : </a>
<a name="277"><span class="lineNum"> 277 </span> : : </a>
<a name="278"><span class="lineNum"> 278 </span> : : /*</a>
<a name="279"><span class="lineNum"> 279 </span> : : * Deserialize a single secvar from a buffer.</a>
<a name="280"><span class="lineNum"> 280 </span> : : * Returns an advanced pointer, and an allocated secvar in *var.</a>
<a name="281"><span class="lineNum"> 281 </span> : : * Returns NULL if out of bounds reached, or out of memory.</a>
<a name="282"><span class="lineNum"> 282 </span> : : */</a>
<a name="283"><span class="lineNum"> 283 </span> :<span class="lineCov"> 8 : static int secboot_deserialize_secvar(struct secvar **var, char **src, const char *end)</span></a>
<a name="284"><span class="lineNum"> 284 </span> : : {</a>
<a name="285"><span class="lineNum"> 285 </span> : : uint64_t key_len;</a>
<a name="286"><span class="lineNum"> 286 </span> : : uint64_t data_size;</a>
<a name="287"><span class="lineNum"> 287 </span> : : struct secvar *ret;</a>
<a name="288"><span class="lineNum"> 288 </span> : : </a>
<a name="289"><span class="lineNum"> 289 </span> :<span class="lineCov"> 8 : assert(var);</span></a>
<a name="290"><span class="lineNum"> 290 </span> : : </a>
<a name="291"><span class="lineNum"> 291 </span> : : /* Load in the two header values */</a>
<a name="292"><span class="lineNum"> 292 </span> :<span class="lineCov"> 8 : key_len = be64_to_cpu(*((uint64_t *) *src));</span></a>
<a name="293"><span class="lineNum"> 293 </span> :<span class="lineCov"> 8 : *src += sizeof(uint64_t);</span></a>
<a name="294"><span class="lineNum"> 294 </span> :<span class="lineCov"> 8 : data_size = be64_to_cpu(*((uint64_t *) *src));</span></a>
<a name="295"><span class="lineNum"> 295 </span> :<span class="lineCov"> 8 : *src += sizeof(uint64_t);</span></a>
<a name="296"><span class="lineNum"> 296 </span> : : </a>
<a name="297"><span class="lineNum"> 297 </span> : : /* Check if we've reached the last var to deserialize */</a>
<a name="298"><span class="lineNum"> 298 </span> :<span class="lineCov"> 8 : if ((key_len == 0) && (data_size == 0)) {</span></a>
<a name="299"><span class="lineNum"> 299 </span> :<span class="lineCov"> 4 : return OPAL_EMPTY;</span></a>
<a name="300"><span class="lineNum"> 300 </span> : : }</a>
<a name="301"><span class="lineNum"> 301 </span> : : </a>
<a name="302"><span class="lineNum"> 302 </span> :<span class="lineCov"> 4 : if (key_len > SECVAR_MAX_KEY_LEN) {</span></a>
<a name="303"><span class="lineNum"> 303 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Deserialization failed: key length exceeded maximum value"</span></a>
<a name="304"><span class="lineNum"> 304 </span> : : "%llu > %u", key_len, SECVAR_MAX_KEY_LEN);</a>
<a name="305"><span class="lineNum"> 305 </span> :<span class="lineNoCov"> 0 : return OPAL_RESOURCE;</span></a>
<a name="306"><span class="lineNum"> 306 </span> : : }</a>
<a name="307"><span class="lineNum"> 307 </span> :<span class="lineCov"> 4 : if (data_size > SECBOOT_TPM_MAX_VAR_SIZE) {</span></a>
<a name="308"><span class="lineNum"> 308 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Deserialization failed: data size exceeded maximum value"</span></a>
<a name="309"><span class="lineNum"> 309 </span> : : "%llu > %u", key_len, SECBOOT_TPM_MAX_VAR_SIZE);</a>
<a name="310"><span class="lineNum"> 310 </span> :<span class="lineNoCov"> 0 : return OPAL_RESOURCE;</span></a>
<a name="311"><span class="lineNum"> 311 </span> : : }</a>
<a name="312"><span class="lineNum"> 312 </span> : : </a>
<a name="313"><span class="lineNum"> 313 </span> : : /* Make sure these fields aren't oversized... */</a>
<a name="314"><span class="lineNum"> 314 </span> :<span class="lineCov"> 4 : if ((*src + key_len + data_size) > end) {</span></a>
<a name="315"><span class="lineNum"> 315 </span> :<span class="lineNoCov"> 0 : *var = NULL;</span></a>
<a name="316"><span class="lineNum"> 316 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "key_len or data_size exceeded the expected bounds");</span></a>
<a name="317"><span class="lineNum"> 317 </span> :<span class="lineNoCov"> 0 : return OPAL_RESOURCE;</span></a>
<a name="318"><span class="lineNum"> 318 </span> : : }</a>
<a name="319"><span class="lineNum"> 319 </span> : : </a>
<a name="320"><span class="lineNum"> 320 </span> :<span class="lineCov"> 4 : ret = alloc_secvar(key_len, data_size);</span></a>
<a name="321"><span class="lineNum"> 321 </span> :<span class="lineCov"> 4 : if (!ret) {</span></a>
<a name="322"><span class="lineNum"> 322 </span> :<span class="lineNoCov"> 0 : *var = NULL;</span></a>
<a name="323"><span class="lineNum"> 323 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Out of memory, could not allocate new secvar");</span></a>
<a name="324"><span class="lineNum"> 324 </span> :<span class="lineNoCov"> 0 : return OPAL_NO_MEM;</span></a>
<a name="325"><span class="lineNum"> 325 </span> : : }</a>
<a name="326"><span class="lineNum"> 326 </span> : : </a>
<a name="327"><span class="lineNum"> 327 </span> : : /* Load in variable-sized data */</a>
<a name="328"><span class="lineNum"> 328 </span> :<span class="lineCov"> 4 : memcpy(ret->key, *src, ret->key_len);</span></a>
<a name="329"><span class="lineNum"> 329 </span> :<span class="lineCov"> 4 : *src += ret->key_len;</span></a>
<a name="330"><span class="lineNum"> 330 </span> :<span class="lineCov"> 4 : memcpy(ret->data, *src, ret->data_size);</span></a>
<a name="331"><span class="lineNum"> 331 </span> :<span class="lineCov"> 4 : *src += ret->data_size;</span></a>
<a name="332"><span class="lineNum"> 332 </span> : : </a>
<a name="333"><span class="lineNum"> 333 </span> :<span class="lineCov"> 4 : *var = ret;</span></a>
<a name="334"><span class="lineNum"> 334 </span> : : </a>
<a name="335"><span class="lineNum"> 335 </span> :<span class="lineCov"> 4 : return OPAL_SUCCESS;</span></a>
<a name="336"><span class="lineNum"> 336 </span> : : }</a>
<a name="337"><span class="lineNum"> 337 </span> : : </a>
<a name="338"><span class="lineNum"> 338 </span> : : </a>
<a name="339"><span class="lineNum"> 339 </span> : : /* Load variables from a flattened buffer into a bank list */</a>
<a name="340"><span class="lineNum"> 340 </span> :<span class="lineCov"> 4 : static int secboot_tpm_deserialize_from_buffer(struct list_head *bank, char *src,</span></a>
<a name="341"><span class="lineNum"> 341 </span> : : uint64_t size, uint64_t flags)</a>
<a name="342"><span class="lineNum"> 342 </span> : : {</a>
<a name="343"><span class="lineNum"> 343 </span> : : struct secvar *var;</a>
<a name="344"><span class="lineNum"> 344 </span> : : char *cur;</a>
<a name="345"><span class="lineNum"> 345 </span> : : char *end;</a>
<a name="346"><span class="lineNum"> 346 </span> :<span class="lineCov"> 4 : int rc = 0;</span></a>
<a name="347"><span class="lineNum"> 347 </span> : : </a>
<a name="348"><span class="lineNum"> 348 </span> :<span class="lineCov"> 4 : cur = src;</span></a>
<a name="349"><span class="lineNum"> 349 </span> :<span class="lineCov"> 4 : end = src + size;</span></a>
<a name="350"><span class="lineNum"> 350 </span> : : </a>
<a name="351"><span class="lineNum"> 351 </span> :<span class="lineCov"> 8 : while (cur < end) {</span></a>
<a name="352"><span class="lineNum"> 352 </span> : : /* Ensure there is enough space to even check for another var header */</a>
<a name="353"><span class="lineNum"> 353 </span> :<span class="lineCov"> 8 : if ((end - cur) < (sizeof(uint64_t) * 2))</span></a>
<a name="354"><span class="lineNum"> 354 </span> :<span class="lineNoCov"> 0 : break;</span></a>
<a name="355"><span class="lineNum"> 355 </span> : : </a>
<a name="356"><span class="lineNum"> 356 </span> :<span class="lineCov"> 8 : rc = secboot_deserialize_secvar(&var, &cur, end);</span></a>
<a name="357"><span class="lineNum"> 357 </span> :<span class="lineCov"> 8 : switch (rc) {</span></a>
<a name="358"><span class="lineNum"> 358 </span> :<span class="lineNoCov"> 0 : case OPAL_RESOURCE:</span></a>
<a name="359"><span class="lineNum"> 359 </span> : : case OPAL_NO_MEM:</a>
<a name="360"><span class="lineNum"> 360 </span> :<span class="lineNoCov"> 0 : goto fail;</span></a>
<a name="361"><span class="lineNum"> 361 </span> :<span class="lineCov"> 4 : case OPAL_EMPTY:</span></a>
<a name="362"><span class="lineNum"> 362 </span> :<span class="lineCov"> 4 : goto done;</span></a>
<a name="363"><span class="lineNum"> 363 </span> :<span class="lineCov"> 4 : default: assert(1);</span></a>
<a name="364"><span class="lineNum"> 364 </span> : : }</a>
<a name="365"><span class="lineNum"> 365 </span> : : </a>
<a name="366"><span class="lineNum"> 366 </span> :<span class="lineCov"> 4 : var->flags |= flags;</span></a>
<a name="367"><span class="lineNum"> 367 </span> : : </a>
<a name="368"><span class="lineNum"> 368 </span> :<span class="lineCov"> 4 : list_add_tail(bank, &var->link);</span></a>
<a name="369"><span class="lineNum"> 369 </span> : : }</a>
<a name="370"><span class="lineNum"> 370 </span> :<span class="lineNoCov"> 0 : done:</span></a>
<a name="371"><span class="lineNum"> 371 </span> :<span class="lineCov"> 4 : return OPAL_SUCCESS;</span></a>
<a name="372"><span class="lineNum"> 372 </span> :<span class="lineNoCov"> 0 : fail:</span></a>
<a name="373"><span class="lineNum"> 373 </span> :<span class="lineNoCov"> 0 : clear_bank_list(bank);</span></a>
<a name="374"><span class="lineNum"> 374 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="375"><span class="lineNum"> 375 </span> : : }</a>
<a name="376"><span class="lineNum"> 376 </span> : : </a>
<a name="377"><span class="lineNum"> 377 </span> : : </a>
<a name="378"><span class="lineNum"> 378 </span> : : /* Helper to validate the current active SECBOOT bank's data against the hash stored in the TPM */</a>
<a name="379"><span class="lineNum"> 379 </span> :<span class="lineNoCov"> 0 : static int compare_bank_hash(void)</span></a>
<a name="380"><span class="lineNum"> 380 </span> : : {</a>
<a name="381"><span class="lineNum"> 381 </span> : : char bank_hash[SHA256_DIGEST_LENGTH];</a>
<a name="382"><span class="lineNum"> 382 </span> :<span class="lineNoCov"> 0 : uint64_t bit = tpmnv_control_image->active_bit;</span></a>
<a name="383"><span class="lineNum"> 383 </span> : : int rc;</a>
<a name="384"><span class="lineNum"> 384 </span> : : </a>
<a name="385"><span class="lineNum"> 385 </span> : : /* Check the hash of the bank we loaded from PNOR</a>
<a name="386"><span class="lineNum"> 386 </span> : : * versus the expected hash in TPM NV */</a>
<a name="387"><span class="lineNum"> 387 </span> :<span class="lineNoCov"> 0 : rc = calc_bank_hash(bank_hash,</span></a>
<a name="388"><span class="lineNum"> 388 </span> :<span class="lineNoCov"> 0 : secboot_image->bank[bit],</span></a>
<a name="389"><span class="lineNum"> 389 </span> : : SECBOOT_VARIABLE_BANK_SIZE);</a>
<a name="390"><span class="lineNum"> 390 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="391"><span class="lineNum"> 391 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="392"><span class="lineNum"> 392 </span> : : </a>
<a name="393"><span class="lineNum"> 393 </span> :<span class="lineNoCov"> 0 : if (memcmp(bank_hash,</span></a>
<a name="394"><span class="lineNum"> 394 </span> :<span class="lineNoCov"> 0 : tpmnv_control_image->bank_hash[bit],</span></a>
<a name="395"><span class="lineNum"> 395 </span> : : SHA256_DIGEST_LENGTH))</a>
<a name="396"><span class="lineNum"> 396 </span> : : /* Tampered pnor space detected, abandon ship */</a>
<a name="397"><span class="lineNum"> 397 </span> :<span class="lineNoCov"> 0 : return OPAL_PERMISSION;</span></a>
<a name="398"><span class="lineNum"> 398 </span> : : </a>
<a name="399"><span class="lineNum"> 399 </span> :<span class="lineNoCov"> 0 : return OPAL_SUCCESS;</span></a>
<a name="400"><span class="lineNum"> 400 </span> : : }</a>
<a name="401"><span class="lineNum"> 401 </span> : : </a>
<a name="402"><span class="lineNum"> 402 </span> : : </a>
<a name="403"><span class="lineNum"> 403 </span> :<span class="lineCov"> 2 : static int secboot_tpm_load_variable_bank(struct list_head *bank)</span></a>
<a name="404"><span class="lineNum"> 404 </span> : : {</a>
<a name="405"><span class="lineNum"> 405 </span> :<span class="lineCov"> 2 : uint64_t bit = tpmnv_control_image->active_bit;</span></a>
<a name="406"><span class="lineNum"> 406 </span> : : int rc;</a>
<a name="407"><span class="lineNum"> 407 </span> : : </a>
<a name="408"><span class="lineNum"> 408 </span> :<span class="lineCov"> 2 : rc = secboot_tpm_deserialize_from_buffer(bank, tpmnv_vars_image->vars, tpmnv_vars_size, SECVAR_FLAG_PROTECTED);</span></a>
<a name="409"><span class="lineNum"> 409 </span> :<span class="lineCov"> 2 : if (rc)</span></a>
<a name="410"><span class="lineNum"> 410 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="411"><span class="lineNum"> 411 </span> : : </a>
<a name="412"><span class="lineNum"> 412 </span> :<span class="lineCov"> 2 : return secboot_tpm_deserialize_from_buffer(bank, secboot_image->bank[bit], SECBOOT_VARIABLE_BANK_SIZE, 0);</span></a>
<a name="413"><span class="lineNum"> 413 </span> : : }</a>
<a name="414"><span class="lineNum"> 414 </span> : : </a>
<a name="415"><span class="lineNum"> 415 </span> : : </a>
<a name="416"><span class="lineNum"> 416 </span> :<span class="lineCov"> 2 : static int secboot_tpm_load_bank(struct list_head *bank, int section)</span></a>
<a name="417"><span class="lineNum"> 417 </span> : : {</a>
<a name="418"><span class="lineNum"> 418 </span> :<span class="lineCov"> 2 : switch (section) {</span></a>
<a name="419"><span class="lineNum"> 419 </span> :<span class="lineCov"> 2 : case SECVAR_VARIABLE_BANK:</span></a>
<a name="420"><span class="lineNum"> 420 </span> :<span class="lineCov"> 2 : return secboot_tpm_load_variable_bank(bank);</span></a>
<a name="421"><span class="lineNum"> 421 </span> :<span class="lineNoCov"> 0 : case SECVAR_UPDATE_BANK:</span></a>
<a name="422"><span class="lineNum"> 422 </span> :<span class="lineNoCov"> 0 : return secboot_tpm_deserialize_from_buffer(bank, secboot_image->update, SECBOOT_UPDATE_BANK_SIZE, 0);</span></a>
<a name="423"><span class="lineNum"> 423 </span> : : }</a>
<a name="424"><span class="lineNum"> 424 </span> : : </a>
<a name="425"><span class="lineNum"> 425 </span> :<span class="lineNoCov"> 0 : return OPAL_HARDWARE;</span></a>
<a name="426"><span class="lineNum"> 426 </span> : : }</a>
<a name="427"><span class="lineNum"> 427 </span> : : </a>
<a name="428"><span class="lineNum"> 428 </span> :<span class="lineNoCov"> 0 : static int secboot_tpm_get_tpmnv_names(char *nv_vars_name, char *nv_control_name)</span></a>
<a name="429"><span class="lineNum"> 429 </span> : : {</a>
<a name="430"><span class="lineNum"> 430 </span> : : TPMS_NV_PUBLIC nv_public; /* Throwaway, we only want the name field */</a>
<a name="431"><span class="lineNum"> 431 </span> : : TPM2B_NAME vars_tmp;</a>
<a name="432"><span class="lineNum"> 432 </span> : : TPM2B_NAME control_tmp;</a>
<a name="433"><span class="lineNum"> 433 </span> : : int rc;</a>
<a name="434"><span class="lineNum"> 434 </span> : : </a>
<a name="435"><span class="lineNum"> 435 </span> :<span class="lineNoCov"> 0 : rc = tpmnv_ops.readpublic(SECBOOT_TPMNV_VARS_INDEX,</span></a>
<a name="436"><span class="lineNum"> 436 </span> : : &nv_public,</a>
<a name="437"><span class="lineNum"> 437 </span> : : &vars_tmp);</a>
<a name="438"><span class="lineNum"> 438 </span> :<span class="lineNoCov"> 0 : if (rc) {</span></a>
<a name="439"><span class="lineNum"> 439 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to readpublic from the VARS index, rc=%d\n", rc);</span></a>
<a name="440"><span class="lineNum"> 440 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="441"><span class="lineNum"> 441 </span> : : }</a>
<a name="442"><span class="lineNum"> 442 </span> :<span class="lineNoCov"> 0 : rc = tpmnv_ops.readpublic(SECBOOT_TPMNV_CONTROL_INDEX,</span></a>
<a name="443"><span class="lineNum"> 443 </span> : : &nv_public,</a>
<a name="444"><span class="lineNum"> 444 </span> : : &control_tmp);</a>
<a name="445"><span class="lineNum"> 445 </span> :<span class="lineNoCov"> 0 : if (rc) {</span></a>
<a name="446"><span class="lineNum"> 446 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to readpublic from the CONTROL index, rc=%d\n", rc);</span></a>
<a name="447"><span class="lineNum"> 447 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="448"><span class="lineNum"> 448 </span> : : }</a>
<a name="449"><span class="lineNum"> 449 </span> : : </a>
<a name="450"><span class="lineNum"> 450 </span> :<span class="lineNoCov"> 0 : memcpy(nv_vars_name, vars_tmp.t.name, MIN(sizeof(tpmnv_vars_name), vars_tmp.t.size));</span></a>
<a name="451"><span class="lineNum"> 451 </span> :<span class="lineNoCov"> 0 : memcpy(nv_control_name, control_tmp.t.name, MIN(sizeof(tpmnv_control_name), control_tmp.t.size));</span></a>
<a name="452"><span class="lineNum"> 452 </span> : : </a>
<a name="453"><span class="lineNum"> 453 </span> :<span class="lineNoCov"> 0 : return OPAL_SUCCESS;</span></a>
<a name="454"><span class="lineNum"> 454 </span> : : }</a>
<a name="455"><span class="lineNum"> 455 </span> : : </a>
<a name="456"><span class="lineNum"> 456 </span> : : </a>
<a name="457"><span class="lineNum"> 457 </span> : : /* Ensure the NV indices were defined with the correct set of attributes */</a>
<a name="458"><span class="lineNum"> 458 </span> :<span class="lineNoCov"> 0 : static int secboot_tpm_check_tpmnv_attrs(char *nv_vars_name, char *nv_control_name)</span></a>
<a name="459"><span class="lineNum"> 459 </span> : : {</a>
<a name="460"><span class="lineNum"> 460 </span> :<span class="lineNoCov"> 0 : if (memcmp(tpmnv_vars_name,</span></a>
<a name="461"><span class="lineNum"> 461 </span> : : nv_vars_name,</a>
<a name="462"><span class="lineNum"> 462 </span> : : sizeof(tpmnv_vars_name))) {</a>
<a name="463"><span class="lineNum"> 463 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "VARS index not defined with the correct attributes\n");</span></a>
<a name="464"><span class="lineNum"> 464 </span> :<span class="lineNoCov"> 0 : return OPAL_RESOURCE;</span></a>
<a name="465"><span class="lineNum"> 465 </span> : : }</a>
<a name="466"><span class="lineNum"> 466 </span> :<span class="lineNoCov"> 0 : if (memcmp(tpmnv_control_name,</span></a>
<a name="467"><span class="lineNum"> 467 </span> : : nv_control_name,</a>
<a name="468"><span class="lineNum"> 468 </span> : : sizeof(tpmnv_control_name))) {</a>
<a name="469"><span class="lineNum"> 469 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "CONTROL index not defined with the correct attributes\n");</span></a>
<a name="470"><span class="lineNum"> 470 </span> :<span class="lineNoCov"> 0 : return OPAL_RESOURCE;</span></a>
<a name="471"><span class="lineNum"> 471 </span> : : }</a>
<a name="472"><span class="lineNum"> 472 </span> : : </a>
<a name="473"><span class="lineNum"> 473 </span> :<span class="lineNoCov"> 0 : return OPAL_SUCCESS;</span></a>
<a name="474"><span class="lineNum"> 474 </span> : : }</a>
<a name="475"><span class="lineNum"> 475 </span> : : </a>
<a name="476"><span class="lineNum"> 476 </span> :<span class="lineNoCov"> 0 : static bool secboot_tpm_check_provisioned_indices(char *nv_vars_name, char *nv_control_name)</span></a>
<a name="477"><span class="lineNum"> 477 </span> : : {</a>
<a name="478"><span class="lineNum"> 478 </span> : : /* Check for provisioned NV indices, redefine them if detected. */</a>
<a name="479"><span class="lineNum"> 479 </span> :<span class="lineNoCov"> 0 : if (!memcmp(tpmnv_vars_prov_name,</span></a>
<a name="480"><span class="lineNum"> 480 </span> : : nv_vars_name,</a>
<a name="481"><span class="lineNum"> 481 </span> :<span class="lineNoCov"> 0 : sizeof(tpmnv_vars_prov_name)) &&</span></a>
<a name="482"><span class="lineNum"> 482 </span> :<span class="lineNoCov"> 0 : !memcmp(tpmnv_control_prov_name,</span></a>
<a name="483"><span class="lineNum"> 483 </span> : : nv_control_name,</a>
<a name="484"><span class="lineNum"> 484 </span> : : sizeof(tpmnv_control_prov_name))) {</a>
<a name="485"><span class="lineNum"> 485 </span> :<span class="lineNoCov"> 0 : return true;</span></a>
<a name="486"><span class="lineNum"> 486 </span> : : }</a>
<a name="487"><span class="lineNum"> 487 </span> : : </a>
<a name="488"><span class="lineNum"> 488 </span> : : /*</a>
<a name="489"><span class="lineNum"> 489 </span> : : * If one matches but the other doesn't, do NOT redefine.</a>
<a name="490"><span class="lineNum"> 490 </span> : : * The next step should detect they don't match the expected values</a>
<a name="491"><span class="lineNum"> 491 </span> : : * and fail the boot.</a>
<a name="492"><span class="lineNum"> 492 </span> : : */</a>
<a name="493"><span class="lineNum"> 493 </span> :<span class="lineNoCov"> 0 : return false;</span></a>
<a name="494"><span class="lineNum"> 494 </span> : : }</a>
<a name="495"><span class="lineNum"> 495 </span> : : </a>
<a name="496"><span class="lineNum"> 496 </span> :<span class="lineCov"> 1 : static int secboot_tpm_define_indices(void)</span></a>
<a name="497"><span class="lineNum"> 497 </span> : : {</a>
<a name="498"><span class="lineNum"> 498 </span> :<span class="lineCov"> 1 : int rc = OPAL_SUCCESS;</span></a>
<a name="499"><span class="lineNum"> 499 </span> : : </a>
<a name="500"><span class="lineNum"> 500 </span> :<span class="lineCov"> 1 : rc = tpmnv_ops.definespace(SECBOOT_TPMNV_VARS_INDEX, tpmnv_vars_size);</span></a>
<a name="501"><span class="lineNum"> 501 </span> :<span class="lineCov"> 1 : if (rc) {</span></a>
<a name="502"><span class="lineNum"> 502 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to define the VARS index, rc=%d\n", rc);</span></a>
<a name="503"><span class="lineNum"> 503 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="504"><span class="lineNum"> 504 </span> : : }</a>
<a name="505"><span class="lineNum"> 505 </span> : : </a>
<a name="506"><span class="lineNum"> 506 </span> :<span class="lineCov"> 1 : rc = tpmnv_ops.definespace(SECBOOT_TPMNV_CONTROL_INDEX, sizeof(struct tpmnv_control));</span></a>
<a name="507"><span class="lineNum"> 507 </span> :<span class="lineCov"> 1 : if (rc) {</span></a>
<a name="508"><span class="lineNum"> 508 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to define the CONTROL index, rc=%d\n", rc);</span></a>
<a name="509"><span class="lineNum"> 509 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="510"><span class="lineNum"> 510 </span> : : }</a>
<a name="511"><span class="lineNum"> 511 </span> : : </a>
<a name="512"><span class="lineNum"> 512 </span> :<span class="lineCov"> 1 : rc = tpmnv_format();</span></a>
<a name="513"><span class="lineNum"> 513 </span> :<span class="lineCov"> 1 : if (rc)</span></a>
<a name="514"><span class="lineNum"> 514 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="515"><span class="lineNum"> 515 </span> : : </a>
<a name="516"><span class="lineNum"> 516 </span> : : /* TPM NV just got redefined, so unconditionally format the SECBOOT partition */</a>
<a name="517"><span class="lineNum"> 517 </span> :<span class="lineCov"> 1 : return secboot_format();</span></a>
<a name="518"><span class="lineNum"> 518 </span> : : }</a>
<a name="519"><span class="lineNum"> 519 </span> : : </a>
<a name="520"><span class="lineNum"> 520 </span> :<span class="lineNoCov"> 0 : static int secboot_tpm_undefine_indices(bool *vars_defined, bool *control_defined)</span></a>
<a name="521"><span class="lineNum"> 521 </span> : : {</a>
<a name="522"><span class="lineNum"> 522 </span> : : int rc;</a>
<a name="523"><span class="lineNum"> 523 </span> : : </a>
<a name="524"><span class="lineNum"> 524 </span> :<span class="lineNoCov"> 0 : if (vars_defined) {</span></a>
<a name="525"><span class="lineNum"> 525 </span> :<span class="lineNoCov"> 0 : rc = tpmnv_ops.undefinespace(SECBOOT_TPMNV_VARS_INDEX);</span></a>
<a name="526"><span class="lineNum"> 526 </span> :<span class="lineNoCov"> 0 : if (rc) {</span></a>
<a name="527"><span class="lineNum"> 527 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to undefine VARS, something is seriously wrong\n");</span></a>
<a name="528"><span class="lineNum"> 528 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="529"><span class="lineNum"> 529 </span> : : }</a>
<a name="530"><span class="lineNum"> 530 </span> : : }</a>
<a name="531"><span class="lineNum"> 531 </span> : : </a>
<a name="532"><span class="lineNum"> 532 </span> :<span class="lineNoCov"> 0 : if (control_defined) {</span></a>
<a name="533"><span class="lineNum"> 533 </span> :<span class="lineNoCov"> 0 : rc = tpmnv_ops.undefinespace(SECBOOT_TPMNV_CONTROL_INDEX);</span></a>
<a name="534"><span class="lineNum"> 534 </span> :<span class="lineNoCov"> 0 : if (rc) {</span></a>
<a name="535"><span class="lineNum"> 535 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to undefine CONTROL, something is seriously wrong\n");</span></a>
<a name="536"><span class="lineNum"> 536 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="537"><span class="lineNum"> 537 </span> : : }</a>
<a name="538"><span class="lineNum"> 538 </span> : : }</a>
<a name="539"><span class="lineNum"> 539 </span> : : </a>
<a name="540"><span class="lineNum"> 540 </span> :<span class="lineNoCov"> 0 : *vars_defined = *control_defined = false;</span></a>
<a name="541"><span class="lineNum"> 541 </span> : : </a>
<a name="542"><span class="lineNum"> 542 </span> :<span class="lineNoCov"> 0 : return OPAL_SUCCESS;</span></a>
<a name="543"><span class="lineNum"> 543 </span> : : }</a>
<a name="544"><span class="lineNum"> 544 </span> : : </a>
<a name="545"><span class="lineNum"> 545 </span> : : </a>
<a name="546"><span class="lineNum"> 546 </span> :<span class="lineCov"> 1 : static int secboot_tpm_store_init(void)</span></a>
<a name="547"><span class="lineNum"> 547 </span> : : {</a>
<a name="548"><span class="lineNum"> 548 </span> : : int rc;</a>
<a name="549"><span class="lineNum"> 549 </span> : : unsigned int secboot_size;</a>
<a name="550"><span class="lineNum"> 550 </span> : : </a>
<a name="551"><span class="lineNum"> 551 </span> :<span class="lineCov"> 1 : TPMI_RH_NV_INDEX *indices = NULL;</span></a>
<a name="552"><span class="lineNum"> 552 </span> : : char nv_vars_name[sizeof(tpmnv_vars_name)];</a>
<a name="553"><span class="lineNum"> 553 </span> : : char nv_control_name[sizeof(tpmnv_control_name)];</a>
<a name="554"><span class="lineNum"> 554 </span> :<span class="lineCov"> 1 : size_t count = 0;</span></a>
<a name="555"><span class="lineNum"> 555 </span> :<span class="lineCov"> 1 : bool control_defined = false;</span></a>
<a name="556"><span class="lineNum"> 556 </span> :<span class="lineCov"> 1 : bool vars_defined = false;</span></a>
<a name="557"><span class="lineNum"> 557 </span> : : int i;</a>
<a name="558"><span class="lineNum"> 558 </span> : : </a>
<a name="559"><span class="lineNum"> 559 </span> :<span class="lineCov"> 1 : if (secboot_image)</span></a>
<a name="560"><span class="lineNum"> 560 </span> :<span class="lineNoCov"> 0 : return OPAL_SUCCESS;</span></a>
<a name="561"><span class="lineNum"> 561 </span> : : </a>
<a name="562"><span class="lineNum"> 562 </span> :<span class="lineCov"> 1 : prlog(PR_DEBUG, "Initializing for pnor+tpm based platform\n");</span></a>
<a name="563"><span class="lineNum"> 563 </span> : : </a>
<a name="564"><span class="lineNum"> 564 </span> : : /* Initialize SECBOOT first, we may need to format this later */</a>
<a name="565"><span class="lineNum"> 565 </span> :<span class="lineCov"> 1 : rc = flash_secboot_info(&secboot_size);</span></a>
<a name="566"><span class="lineNum"> 566 </span> :<span class="lineCov"> 1 : if (rc) {</span></a>
<a name="567"><span class="lineNum"> 567 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "error %d retrieving keystore info\n", rc);</span></a>
<a name="568"><span class="lineNum"> 568 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="569"><span class="lineNum"> 569 </span> : : }</a>
<a name="570"><span class="lineNum"> 570 </span> :<span class="lineCov"> 1 : if (sizeof(struct secboot) > secboot_size) {</span></a>
<a name="571"><span class="lineNum"> 571 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "secboot partition %d KB too small. min=%ld\n",</span></a>
<a name="572"><span class="lineNum"> 572 </span> : : secboot_size >> 10, sizeof(struct secboot));</a>
<a name="573"><span class="lineNum"> 573 </span> :<span class="lineNoCov"> 0 : rc = OPAL_RESOURCE;</span></a>
<a name="574"><span class="lineNum"> 574 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="575"><span class="lineNum"> 575 </span> : : }</a>
<a name="576"><span class="lineNum"> 576 </span> : : </a>
<a name="577"><span class="lineNum"> 577 </span> :<span class="lineCov"> 1 : secboot_image = memalign(0x1000, sizeof(struct secboot));</span></a>
<a name="578"><span class="lineNum"> 578 </span> :<span class="lineCov"> 1 : if (!secboot_image) {</span></a>
<a name="579"><span class="lineNum"> 579 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to allocate space for the secboot image\n");</span></a>
<a name="580"><span class="lineNum"> 580 </span> :<span class="lineNoCov"> 0 : rc = OPAL_NO_MEM;</span></a>
<a name="581"><span class="lineNum"> 581 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="582"><span class="lineNum"> 582 </span> : : }</a>
<a name="583"><span class="lineNum"> 583 </span> : : </a>
<a name="584"><span class="lineNum"> 584 </span> : : /* Read in the PNOR data, bank hash is checked on call to .load_bank() */</a>
<a name="585"><span class="lineNum"> 585 </span> :<span class="lineCov"> 1 : rc = flash_secboot_read(secboot_image, 0, sizeof(struct secboot));</span></a>
<a name="586"><span class="lineNum"> 586 </span> :<span class="lineCov"> 1 : if (rc) {</span></a>
<a name="587"><span class="lineNum"> 587 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "failed to read the secboot partition, rc=%d\n", rc);</span></a>
<a name="588"><span class="lineNum"> 588 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="589"><span class="lineNum"> 589 </span> : : }</a>
<a name="590"><span class="lineNum"> 590 </span> : : </a>
<a name="591"><span class="lineNum"> 591 </span> : : /* Allocate the tpmnv data buffers */</a>
<a name="592"><span class="lineNum"> 592 </span> :<span class="lineCov"> 1 : tpmnv_vars_image = zalloc(tpmnv_vars_size);</span></a>
<a name="593"><span class="lineNum"> 593 </span> :<span class="lineCov"> 1 : if (!tpmnv_vars_image)</span></a>
<a name="594"><span class="lineNum"> 594 </span> :<span class="lineNoCov"> 0 : return OPAL_NO_MEM;</span></a>
<a name="595"><span class="lineNum"> 595 </span> :<span class="lineCov"> 1 : tpmnv_control_image = zalloc(sizeof(struct tpmnv_control));</span></a>
<a name="596"><span class="lineNum"> 596 </span> :<span class="lineCov"> 1 : if (!tpmnv_control_image)</span></a>
<a name="597"><span class="lineNum"> 597 </span> :<span class="lineNoCov"> 0 : return OPAL_NO_MEM;</span></a>
<a name="598"><span class="lineNum"> 598 </span> : : </a>
<a name="599"><span class="lineNum"> 599 </span> : : /* Check if the NV indices have been defined already */</a>
<a name="600"><span class="lineNum"> 600 </span> :<span class="lineCov"> 1 : rc = tpmnv_ops.getindices(&indices, &count);</span></a>
<a name="601"><span class="lineNum"> 601 </span> :<span class="lineCov"> 1 : if (rc) {</span></a>
<a name="602"><span class="lineNum"> 602 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Could not load defined indicies from TPM, rc=%d\n", rc);</span></a>
<a name="603"><span class="lineNum"> 603 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="604"><span class="lineNum"> 604 </span> : : }</a>
<a name="605"><span class="lineNum"> 605 </span> : : </a>
<a name="606"><span class="lineNum"> 606 </span> :<span class="lineCov"> 1 : for (i = 0; i < count; i++) {</span></a>
<a name="607"><span class="lineNum"> 607 </span> :<span class="lineNoCov"> 0 : if (indices[i] == SECBOOT_TPMNV_VARS_INDEX)</span></a>
<a name="608"><span class="lineNum"> 608 </span> :<span class="lineNoCov"> 0 : vars_defined = true;</span></a>
<a name="609"><span class="lineNum"> 609 </span> :<span class="lineNoCov"> 0 : else if (indices[i] == SECBOOT_TPMNV_CONTROL_INDEX)</span></a>
<a name="610"><span class="lineNum"> 610 </span> :<span class="lineNoCov"> 0 : control_defined = true;</span></a>
<a name="611"><span class="lineNum"> 611 </span> : : }</a>
<a name="612"><span class="lineNum"> 612 </span> :<span class="lineCov"> 1 : free(indices);</span></a>
<a name="613"><span class="lineNum"> 613 </span> : : </a>
<a name="614"><span class="lineNum"> 614 </span> : : /* Undefine the NV indices if physical presence has been asserted */</a>
<a name="615"><span class="lineNum"> 615 </span> :<span class="lineCov"> 1 : if (secvar_check_physical_presence()) {</span></a>
<a name="616"><span class="lineNum"> 616 </span> :<span class="lineNoCov"> 0 : prlog(PR_INFO, "Physical presence asserted, redefining NV indices, and resetting keystore\n");</span></a>
<a name="617"><span class="lineNum"> 617 </span> :<span class="lineNoCov"> 0 : rc = secboot_tpm_undefine_indices(&vars_defined, &control_defined);</span></a>
<a name="618"><span class="lineNum"> 618 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="619"><span class="lineNum"> 619 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="620"><span class="lineNum"> 620 </span> : : </a>
<a name="621"><span class="lineNum"> 621 </span> :<span class="lineNoCov"> 0 : rc = secboot_tpm_define_indices();</span></a>
<a name="622"><span class="lineNum"> 622 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="623"><span class="lineNum"> 623 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="624"><span class="lineNum"> 624 </span> : : </a>
<a name="625"><span class="lineNum"> 625 </span> : : /* Indices got defined and formatted, we're done here */</a>
<a name="626"><span class="lineNum"> 626 </span> :<span class="lineNoCov"> 0 : goto done;</span></a>
<a name="627"><span class="lineNum"> 627 </span> : : }</a>
<a name="628"><span class="lineNum"> 628 </span> : : /* Determine if we need to define the indices. These should BOTH be false or true */</a>
<a name="629"><span class="lineNum"> 629 </span> :<span class="lineCov"> 1 : if (!vars_defined && !control_defined) {</span></a>
<a name="630"><span class="lineNum"> 630 </span> :<span class="lineCov"> 1 : rc = secboot_tpm_define_indices();</span></a>
<a name="631"><span class="lineNum"> 631 </span> :<span class="lineCov"> 1 : if (rc)</span></a>
<a name="632"><span class="lineNum"> 632 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="633"><span class="lineNum"> 633 </span> : : </a>
<a name="634"><span class="lineNum"> 634 </span> : : /* Indices got defined and formatted, we're done here */</a>
<a name="635"><span class="lineNum"> 635 </span> :<span class="lineCov"> 1 : goto done;</span></a>
<a name="636"><span class="lineNum"> 636 </span> : : }</a>
<a name="637"><span class="lineNum"> 637 </span> :<span class="lineNoCov"> 0 : if (vars_defined ^ control_defined) {</span></a>
<a name="638"><span class="lineNum"> 638 </span> : : /* This should never happen. Both indices should be defined at the same</a>
<a name="639"><span class="lineNum"> 639 </span> : : * time. Otherwise something seriously went wrong. */</a>
<a name="640"><span class="lineNum"> 640 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "NV indices defined with unexpected attributes. Assert physical presence to clear\n");</span></a>
<a name="641"><span class="lineNum"> 641 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="642"><span class="lineNum"> 642 </span> : : }</a>
<a name="643"><span class="lineNum"> 643 </span> : : </a>
<a name="644"><span class="lineNum"> 644 </span> : : /* Both indices are defined, now need to validate their contents */</a>
<a name="645"><span class="lineNum"> 645 </span> : : </a>
<a name="646"><span class="lineNum"> 646 </span> :<span class="lineNoCov"> 0 : rc = secboot_tpm_get_tpmnv_names(nv_vars_name, nv_control_name);</span></a>
<a name="647"><span class="lineNum"> 647 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="648"><span class="lineNum"> 648 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="649"><span class="lineNum"> 649 </span> : : </a>
<a name="650"><span class="lineNum"> 650 </span> : : /* Check for provisioned TPMNV indices, redefine them if detected */</a>
<a name="651"><span class="lineNum"> 651 </span> :<span class="lineNoCov"> 0 : if (secboot_tpm_check_provisioned_indices(nv_vars_name, nv_control_name)) {</span></a>
<a name="652"><span class="lineNum"> 652 </span> :<span class="lineNoCov"> 0 : prlog(PR_INFO, "Provisioned TPM NV indices detected, redefining NV indices, and resetting keystore\n");</span></a>
<a name="653"><span class="lineNum"> 653 </span> :<span class="lineNoCov"> 0 : rc = secboot_tpm_undefine_indices(&vars_defined, &control_defined);</span></a>
<a name="654"><span class="lineNum"> 654 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="655"><span class="lineNum"> 655 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="656"><span class="lineNum"> 656 </span> : : </a>
<a name="657"><span class="lineNum"> 657 </span> :<span class="lineNoCov"> 0 : rc = secboot_tpm_define_indices();</span></a>
<a name="658"><span class="lineNum"> 658 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="659"><span class="lineNum"> 659 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="660"><span class="lineNum"> 660 </span> : : </a>
<a name="661"><span class="lineNum"> 661 </span> : : /* Indices got defined and formatted, we're done here */</a>
<a name="662"><span class="lineNum"> 662 </span> :<span class="lineNoCov"> 0 : goto done;</span></a>
<a name="663"><span class="lineNum"> 663 </span> : : }</a>
<a name="664"><span class="lineNum"> 664 </span> : : </a>
<a name="665"><span class="lineNum"> 665 </span> : : /* Otherwise, ensure the NV indices were defined with the correct set of attributes */</a>
<a name="666"><span class="lineNum"> 666 </span> :<span class="lineNoCov"> 0 : rc = secboot_tpm_check_tpmnv_attrs(nv_vars_name, nv_control_name);</span></a>
<a name="667"><span class="lineNum"> 667 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="668"><span class="lineNum"> 668 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="669"><span class="lineNum"> 669 </span> : : </a>
<a name="670"><span class="lineNum"> 670 </span> : : </a>
<a name="671"><span class="lineNum"> 671 </span> : : /* TPMNV indices exist, are correct, and weren't just formatted, so read them in */</a>
<a name="672"><span class="lineNum"> 672 </span> :<span class="lineNoCov"> 0 : rc = tpmnv_ops.read(SECBOOT_TPMNV_VARS_INDEX,</span></a>
<a name="673"><span class="lineNum"> 673 </span> : : tpmnv_vars_image,</a>
<a name="674"><span class="lineNum"> 674 </span> : : tpmnv_vars_size, 0);</a>
<a name="675"><span class="lineNum"> 675 </span> :<span class="lineNoCov"> 0 : if (rc) {</span></a>
<a name="676"><span class="lineNum"> 676 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to read from the VARS index\n");</span></a>
<a name="677"><span class="lineNum"> 677 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="678"><span class="lineNum"> 678 </span> : : }</a>
<a name="679"><span class="lineNum"> 679 </span> : : </a>
<a name="680"><span class="lineNum"> 680 </span> :<span class="lineNoCov"> 0 : rc = tpmnv_ops.read(SECBOOT_TPMNV_CONTROL_INDEX,</span></a>
<a name="681"><span class="lineNum"> 681 </span> : : tpmnv_control_image,</a>
<a name="682"><span class="lineNum"> 682 </span> : : sizeof(struct tpmnv_control), 0);</a>
<a name="683"><span class="lineNum"> 683 </span> :<span class="lineNoCov"> 0 : if (rc) {</span></a>
<a name="684"><span class="lineNum"> 684 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "Failed to read from the CONTROL index\n");</span></a>
<a name="685"><span class="lineNum"> 685 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="686"><span class="lineNum"> 686 </span> : : }</a>
<a name="687"><span class="lineNum"> 687 </span> : : </a>
<a name="688"><span class="lineNum"> 688 </span> : : /* Verify the header information is correct */</a>
<a name="689"><span class="lineNum"> 689 </span> :<span class="lineNoCov"> 0 : if (tpmnv_vars_image->header.magic_number != SECBOOT_MAGIC_NUMBER ||</span></a>
<a name="690"><span class="lineNum"> 690 </span> :<span class="lineNoCov"> 0 : tpmnv_control_image->header.magic_number != SECBOOT_MAGIC_NUMBER ||</span></a>
<a name="691"><span class="lineNum"> 691 </span> :<span class="lineNoCov"> 0 : tpmnv_vars_image->header.version != SECBOOT_VERSION ||</span></a>
<a name="692"><span class="lineNum"> 692 </span> :<span class="lineNoCov"> 0 : tpmnv_control_image->header.version != SECBOOT_VERSION) {</span></a>
<a name="693"><span class="lineNum"> 693 </span> :<span class="lineNoCov"> 0 : prlog(PR_ERR, "TPMNV indices defined, but contain bad data. Assert physical presence to clear\n");</span></a>
<a name="694"><span class="lineNum"> 694 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="695"><span class="lineNum"> 695 </span> : : }</a>
<a name="696"><span class="lineNum"> 696 </span> : : </a>
<a name="697"><span class="lineNum"> 697 </span> : : /* Verify the secboot partition header information,</a>
<a name="698"><span class="lineNum"> 698 </span> : : * reformat if incorrect</a>
<a name="699"><span class="lineNum"> 699 </span> : : * Note: Future variants should attempt to handle older versions safely</a>
<a name="700"><span class="lineNum"> 700 </span> : : */</a>
<a name="701"><span class="lineNum"> 701 </span> :<span class="lineNoCov"> 0 : if (secboot_image->header.magic_number != SECBOOT_MAGIC_NUMBER ||</span></a>
<a name="702"><span class="lineNum"> 702 </span> :<span class="lineNoCov"> 0 : secboot_image->header.version != SECBOOT_VERSION) {</span></a>
<a name="703"><span class="lineNum"> 703 </span> :<span class="lineNoCov"> 0 : rc = secboot_format();</span></a>
<a name="704"><span class="lineNum"> 704 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="705"><span class="lineNum"> 705 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="706"><span class="lineNum"> 706 </span> :<span class="lineNoCov"> 0 : goto done;</span></a>
<a name="707"><span class="lineNum"> 707 </span> : : }</a>
<a name="708"><span class="lineNum"> 708 </span> : : </a>
<a name="709"><span class="lineNum"> 709 </span> : : /* Verify the active bank's integrity by comparing against the hash in TPM.</a>
<a name="710"><span class="lineNum"> 710 </span> : : * Reformat if it does not match -- we do not want to load potentially</a>
<a name="711"><span class="lineNum"> 711 </span> : : * compromised data.</a>
<a name="712"><span class="lineNum"> 712 </span> : : * Ideally, the backend driver should retain secure boot state in</a>
<a name="713"><span class="lineNum"> 713 </span> : : * protected (TPM) storage, so secure boot state should be the same, albeit</a>
<a name="714"><span class="lineNum"> 714 </span> : : * without the data in unprotected (PNOR) storage.</a>
<a name="715"><span class="lineNum"> 715 </span> : : */</a>
<a name="716"><span class="lineNum"> 716 </span> :<span class="lineNoCov"> 0 : rc = compare_bank_hash();</span></a>
<a name="717"><span class="lineNum"> 717 </span> :<span class="lineNoCov"> 0 : if (rc == OPAL_PERMISSION) {</span></a>
<a name="718"><span class="lineNum"> 718 </span> :<span class="lineNoCov"> 0 : rc = secboot_format();</span></a>
<a name="719"><span class="lineNum"> 719 </span> :<span class="lineNoCov"> 0 : if (rc)</span></a>
<a name="720"><span class="lineNum"> 720 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="721"><span class="lineNum"> 721 </span> : : }</a>
<a name="722"><span class="lineNum"> 722 </span> :<span class="lineNoCov"> 0 : else if (rc)</span></a>
<a name="723"><span class="lineNum"> 723 </span> :<span class="lineNoCov"> 0 : goto error;</span></a>
<a name="724"><span class="lineNum"> 724 </span> : : </a>
<a name="725"><span class="lineNum"> 725 </span> :<span class="lineNoCov"> 0 : done:</span></a>
<a name="726"><span class="lineNum"> 726 </span> :<span class="lineCov"> 1 : return OPAL_SUCCESS;</span></a>
<a name="727"><span class="lineNum"> 727 </span> : : </a>
<a name="728"><span class="lineNum"> 728 </span> :<span class="lineNoCov"> 0 : error:</span></a>
<a name="729"><span class="lineNum"> 729 </span> :<span class="lineNoCov"> 0 : free(secboot_image);</span></a>
<a name="730"><span class="lineNum"> 730 </span> :<span class="lineNoCov"> 0 : secboot_image = NULL;</span></a>
<a name="731"><span class="lineNum"> 731 </span> :<span class="lineNoCov"> 0 : free(tpmnv_vars_image);</span></a>
<a name="732"><span class="lineNum"> 732 </span> :<span class="lineNoCov"> 0 : tpmnv_vars_image = NULL;</span></a>
<a name="733"><span class="lineNum"> 733 </span> :<span class="lineNoCov"> 0 : free(tpmnv_control_image);</span></a>
<a name="734"><span class="lineNum"> 734 </span> :<span class="lineNoCov"> 0 : tpmnv_control_image = NULL;</span></a>
<a name="735"><span class="lineNum"> 735 </span> : : </a>
<a name="736"><span class="lineNum"> 736 </span> :<span class="lineNoCov"> 0 : return rc;</span></a>
<a name="737"><span class="lineNum"> 737 </span> : : }</a>
<a name="738"><span class="lineNum"> 738 </span> : : </a>
<a name="739"><span class="lineNum"> 739 </span> : : </a>
<a name="740"><span class="lineNum"> 740 </span> :<span class="lineNoCov"> 0 : static void secboot_tpm_lockdown(void)</span></a>
<a name="741"><span class="lineNum"> 741 </span> : : {</a>
<a name="742"><span class="lineNum"> 742 </span> : : /* Note: While write lock is called here on the two NV indices,</a>
<a name="743"><span class="lineNum"> 743 </span> : : * both indices are also defined on the platform hierarchy.</a>
<a name="744"><span class="lineNum"> 744 </span> : : * The platform hierarchy auth is set later in the skiboot</a>
<a name="745"><span class="lineNum"> 745 </span> : : * initialization process, and not by any secvar-related code.</a>
<a name="746"><span class="lineNum"> 746 </span> : : */</a>
<a name="747"><span class="lineNum"> 747 </span> : : int rc;</a>
<a name="748"><span class="lineNum"> 748 </span> : : </a>
<a name="749"><span class="lineNum"> 749 </span> :<span class="lineNoCov"> 0 : rc = tpmnv_ops.writelock(SECBOOT_TPMNV_VARS_INDEX);</span></a>
<a name="750"><span class="lineNum"> 750 </span> :<span class="lineNoCov"> 0 : if (rc) {</span></a>
<a name="751"><span class="lineNum"> 751 </span> :<span class="lineNoCov"> 0 : prlog(PR_EMERG, "TSS Write Lock failed on VARS index, halting.\n");</span></a>
<a name="752"><span class="lineNum"> 752 </span> :<span class="lineNoCov"> 0 : abort();</span></a>
<a name="753"><span class="lineNum"> 753 </span> : : }</a>
<a name="754"><span class="lineNum"> 754 </span> : : </a>
<a name="755"><span class="lineNum"> 755 </span> :<span class="lineNoCov"> 0 : rc = tpmnv_ops.writelock(SECBOOT_TPMNV_CONTROL_INDEX);</span></a>
<a name="756"><span class="lineNum"> 756 </span> :<span class="lineNoCov"> 0 : if (rc) {</span></a>
<a name="757"><span class="lineNum"> 757 </span> :<span class="lineNoCov"> 0 : prlog(PR_EMERG, "TSS Write Lock failed on CONTROL index, halting.\n");</span></a>
<a name="758"><span class="lineNum"> 758 </span> :<span class="lineNoCov"> 0 : abort();</span></a>
<a name="759"><span class="lineNum"> 759 </span> : : }</a>
<a name="760"><span class="lineNum"> 760 </span> :<span class="lineNoCov"> 0 : }</span></a>
<a name="761"><span class="lineNum"> 761 </span> : : </a>
<a name="762"><span class="lineNum"> 762 </span> : : struct secvar_storage_driver secboot_tpm_driver = {</a>
<a name="763"><span class="lineNum"> 763 </span> : : .load_bank = secboot_tpm_load_bank,</a>
<a name="764"><span class="lineNum"> 764 </span> : : .write_bank = secboot_tpm_write_bank,</a>
<a name="765"><span class="lineNum"> 765 </span> : : .store_init = secboot_tpm_store_init,</a>
<a name="766"><span class="lineNum"> 766 </span> : : .lockdown = secboot_tpm_lockdown,</a>
<a name="767"><span class="lineNum"> 767 </span> : : .max_var_size = SECBOOT_TPM_MAX_VAR_SIZE,</a>
<a name="768"><span class="lineNum"> 768 </span> : : };</a>
</pre>
</td>
</tr>
</table>
<br>
<table width="100%" border=0 cellspacing=0 cellpadding=0>
<tr><td class="ruler"><img src="../../../glass.png" width=3 height=3 alt=""></td></tr>
<tr><td class="versionInfo">Generated by: <a href="http://ltp.sourceforge.net/coverage/lcov.php" target="_parent">LCOV version 1.14</a></td></tr>
</table>
<br>
</body>
</html>
|
