aboutsummaryrefslogtreecommitdiff
path: root/tools/image-host.c
blob: e32cc642579ede6591e0bda065525673c66d3ee7 (plain)
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
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2013, Google Inc.
 *
 * (C) Copyright 2008 Semihalf
 *
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 */

#include "mkimage.h"
#include <bootm.h>
#include <fdt_region.h>
#include <image.h>
#include <version.h>

/**
 * fit_set_hash_value - set hash value in requested has node
 * @fit: pointer to the FIT format image header
 * @noffset: hash node offset
 * @value: hash value to be set
 * @value_len: hash value length
 *
 * fit_set_hash_value() attempts to set hash value in a node at offset
 * given and returns operation status to the caller.
 *
 * returns
 *     0, on success
 *     -1, on failure
 */
static int fit_set_hash_value(void *fit, int noffset, uint8_t *value,
				int value_len)
{
	int ret;

	ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len);
	if (ret) {
		printf("Can't set hash '%s' property for '%s' node(%s)\n",
		       FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL),
		       fdt_strerror(ret));
		return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
	}

	return 0;
}

/**
 * fit_image_process_hash - Process a single subnode of the images/ node
 *
 * Check each subnode and process accordingly. For hash nodes we generate
 * a hash of the supplised data and store it in the node.
 *
 * @fit:	pointer to the FIT format image header
 * @image_name:	name of image being processes (used to display errors)
 * @noffset:	subnode offset
 * @data:	data to process
 * @size:	size of data in bytes
 * @return 0 if ok, -1 on error
 */
static int fit_image_process_hash(void *fit, const char *image_name,
		int noffset, const void *data, size_t size)
{
	uint8_t value[FIT_MAX_HASH_LEN];
	const char *node_name;
	int value_len;
	char *algo;
	int ret;

	node_name = fit_get_name(fit, noffset, NULL);

	if (fit_image_hash_get_algo(fit, noffset, &algo)) {
		printf("Can't get hash algo property for '%s' hash node in '%s' image node\n",
		       node_name, image_name);
		return -ENOENT;
	}

	if (calculate_hash(data, size, algo, value, &value_len)) {
		printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n",
		       algo, node_name, image_name);
		return -EPROTONOSUPPORT;
	}

	ret = fit_set_hash_value(fit, noffset, value, value_len);
	if (ret) {
		printf("Can't set hash value for '%s' hash node in '%s' image node\n",
		       node_name, image_name);
		return ret;
	}

	return 0;
}

/**
 * fit_image_write_sig() - write the signature to a FIT
 *
 * This writes the signature and signer data to the FIT.
 *
 * @fit: pointer to the FIT format image header
 * @noffset: hash node offset
 * @value: signature value to be set
 * @value_len: signature value length
 * @comment: Text comment to write (NULL for none)
 *
 * returns
 *     0, on success
 *     -FDT_ERR_..., on failure
 */
static int fit_image_write_sig(void *fit, int noffset, uint8_t *value,
		int value_len, const char *comment, const char *region_prop,
		int region_proplen, const char *cmdname)
{
	int string_size;
	int ret;

	/*
	 * Get the current string size, before we update the FIT and add
	 * more
	 */
	string_size = fdt_size_dt_strings(fit);

	ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len);
	if (!ret) {
		ret = fdt_setprop_string(fit, noffset, "signer-name",
					 "mkimage");
	}
	if (!ret) {
		ret = fdt_setprop_string(fit, noffset, "signer-version",
				  PLAIN_VERSION);
	}
	if (comment && !ret)
		ret = fdt_setprop_string(fit, noffset, "comment", comment);
	if (!ret) {
		time_t timestamp = imagetool_get_source_date(cmdname,
							     time(NULL));

		ret = fit_set_timestamp(fit, noffset, timestamp);
	}
	if (region_prop && !ret) {
		uint32_t strdata[2];

		ret = fdt_setprop(fit, noffset, "hashed-nodes",
				   region_prop, region_proplen);
		/* This is a legacy offset, it is unused, and must remain 0. */
		strdata[0] = 0;
		strdata[1] = cpu_to_fdt32(string_size);
		if (!ret) {
			ret = fdt_setprop(fit, noffset, "hashed-strings",
					  strdata, sizeof(strdata));
		}
	}

	return ret;
}

static int fit_image_setup_sig(struct image_sign_info *info,
		const char *keydir, void *fit, const char *image_name,
		int noffset, const char *require_keys, const char *engine_id)
{
	const char *node_name;
	char *algo_name;
	const char *padding_name;

	node_name = fit_get_name(fit, noffset, NULL);
	if (fit_image_hash_get_algo(fit, noffset, &algo_name)) {
		printf("Can't get algo property for '%s' signature node in '%s' image node\n",
		       node_name, image_name);
		return -1;
	}

	padding_name = fdt_getprop(fit, noffset, "padding", NULL);

	memset(info, '\0', sizeof(*info));
	info->keydir = keydir;
	info->keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);
	info->fit = fit;
	info->node_offset = noffset;
	info->name = strdup(algo_name);
	info->checksum = image_get_checksum_algo(algo_name);
	info->crypto = image_get_crypto_algo(algo_name);
	info->padding = image_get_padding_algo(padding_name);
	info->require_keys = require_keys;
	info->engine_id = engine_id;
	if (!info->checksum || !info->crypto) {
		printf("Unsupported signature algorithm (%s) for '%s' signature node in '%s' image node\n",
		       algo_name, node_name, image_name);
		return -1;
	}

	return 0;
}

/**
 * fit_image_process_sig- Process a single subnode of the images/ node
 *
 * Check each subnode and process accordingly. For signature nodes we
 * generate a signed hash of the supplised data and store it in the node.
 *
 * @keydir:	Directory containing keys to use for signing
 * @keydest:	Destination FDT blob to write public keys into
 * @fit:	pointer to the FIT format image header
 * @image_name:	name of image being processes (used to display errors)
 * @noffset:	subnode offset
 * @data:	data to process
 * @size:	size of data in bytes
 * @comment:	Comment to add to signature nodes
 * @require_keys: Mark all keys as 'required'
 * @engine_id:	Engine to use for signing
 * @return 0 if ok, -1 on error
 */
static int fit_image_process_sig(const char *keydir, void *keydest,
		void *fit, const char *image_name,
		int noffset, const void *data, size_t size,
		const char *comment, int require_keys, const char *engine_id,
		const char *cmdname)
{
	struct image_sign_info info;
	struct image_region region;
	const char *node_name;
	uint8_t *value;
	uint value_len;
	int ret;

	if (fit_image_setup_sig(&info, keydir, fit, image_name, noffset,
				require_keys ? "image" : NULL, engine_id))
		return -1;

	node_name = fit_get_name(fit, noffset, NULL);
	region.data = data;
	region.size = size;
	ret = info.crypto->sign(&info, &region, 1, &value, &value_len);
	if (ret) {
		printf("Failed to sign '%s' signature node in '%s' image node: %d\n",
		       node_name, image_name, ret);

		/* We allow keys to be missing */
		if (ret == -ENOENT)
			return 0;
		return -1;
	}

	ret = fit_image_write_sig(fit, noffset, value, value_len, comment,
			NULL, 0, cmdname);
	if (ret) {
		if (ret == -FDT_ERR_NOSPACE)
			return -ENOSPC;
		printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
		       node_name, image_name, fdt_strerror(ret));
		return -1;
	}
	free(value);

	/* Get keyname again, as FDT has changed and invalidated our pointer */
	info.keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);

	/*
	 * Write the public key into the supplied FDT file; this might fail
	 * several times, since we try signing with successively increasing
	 * size values
	 */
	if (keydest) {
		ret = info.crypto->add_verify_data(&info, keydest);
		if (ret) {
			printf("Failed to add verification data for '%s' signature node in '%s' image node\n",
			       node_name, image_name);
			return ret;
		}
	}

	return 0;
}

static int fit_image_read_data(char *filename, unsigned char *data,
			       int expected_size)
{
	struct stat sbuf;
	int fd, ret = -1;
	ssize_t n;

	/* Open file */
	fd = open(filename, O_RDONLY | O_BINARY);
	if (fd < 0) {
		printf("Can't open file %s (err=%d => %s)\n",
		       filename, errno, strerror(errno));
		return -1;
	}

	/* Compute file size */
	if (fstat(fd, &sbuf) < 0) {
		printf("Can't fstat file %s (err=%d => %s)\n",
		       filename, errno, strerror(errno));
		goto err;
	}

	/* Check file size */
	if (sbuf.st_size != expected_size) {
		printf("File %s don't have the expected size (size=%lld, expected=%d)\n",
		       filename, (long long)sbuf.st_size, expected_size);
		goto err;
	}

	/* Read data */
	n = read(fd, data, sbuf.st_size);
	if (n < 0) {
		printf("Can't read file %s (err=%d => %s)\n",
		       filename, errno, strerror(errno));
		goto err;
	}

	/* Check that we have read all the file */
	if (n != sbuf.st_size) {
		printf("Can't read all file %s (read %zd bytes, expexted %lld)\n",
		       filename, n, (long long)sbuf.st_size);
		goto err;
	}

	ret = 0;

err:
	close(fd);
	return ret;
}

static int get_random_data(void *data, int size)
{
	unsigned char *tmp = data;
	struct timespec date;
	int i, ret = 0;

	if (!tmp) {
		printf("%s: pointer data is NULL\n", __func__);
		ret = -1;
		goto out;
	}

	ret = clock_gettime(CLOCK_MONOTONIC, &date);
	if (ret < 0) {
		printf("%s: clock_gettime has failed (err=%d, str=%s)\n",
		       __func__, ret, strerror(errno));
		goto out;
	}

	srandom(date.tv_nsec);

	for (i = 0; i < size; i++) {
		*tmp = random() & 0xff;
		tmp++;
	}

 out:
	return ret;
}

static int fit_image_setup_cipher(struct image_cipher_info *info,
				  const char *keydir, void *fit,
				  const char *image_name, int image_noffset,
				  int noffset)
{
	char *algo_name;
	char filename[128];
	int ret = -1;

	if (fit_image_cipher_get_algo(fit, noffset, &algo_name)) {
		printf("Can't get algo name for cipher in image '%s'\n",
		       image_name);
		goto out;
	}

	info->keydir = keydir;

	/* Read the key name */
	info->keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);
	if (!info->keyname) {
		printf("Can't get key name for cipher in image '%s'\n",
		       image_name);
		goto out;
	}

	/*
	 * Read the IV name
	 *
	 * If this property is not provided then mkimage will generate
	 * a random IV and store it in the FIT image
	 */
	info->ivname = fdt_getprop(fit, noffset, "iv-name-hint", NULL);

	info->fit = fit;
	info->node_noffset = noffset;
	info->name = algo_name;

	info->cipher = image_get_cipher_algo(algo_name);
	if (!info->cipher) {
		printf("Can't get algo for cipher '%s'\n", image_name);
		goto out;
	}

	/* Read the key in the file */
	snprintf(filename, sizeof(filename), "%s/%s%s",
		 info->keydir, info->keyname, ".bin");
	info->key = malloc(info->cipher->key_len);
	if (!info->key) {
		printf("Can't allocate memory for key\n");
		ret = -1;
		goto out;
	}
	ret = fit_image_read_data(filename, (unsigned char *)info->key,
				  info->cipher->key_len);
	if (ret < 0)
		goto out;

	info->iv = malloc(info->cipher->iv_len);
	if (!info->iv) {
		printf("Can't allocate memory for iv\n");
		ret = -1;
		goto out;
	}

	if (info->ivname) {
		/* Read the IV in the file */
		snprintf(filename, sizeof(filename), "%s/%s%s",
			 info->keydir, info->ivname, ".bin");
		ret = fit_image_read_data(filename, (unsigned char *)info->iv,
					  info->cipher->iv_len);
	} else {
		/* Generate an ramdom IV */
		ret = get_random_data((void *)info->iv, info->cipher->iv_len);
	}

 out:
	return ret;
}

int fit_image_write_cipher(void *fit, int image_noffset, int noffset,
			   const void *data, size_t size,
			   unsigned char *data_ciphered, int data_ciphered_len)
{
	int ret = -1;

	/* Replace data with ciphered data */
	ret = fdt_setprop(fit, image_noffset, FIT_DATA_PROP,
			  data_ciphered, data_ciphered_len);
	if (ret == -FDT_ERR_NOSPACE) {
		ret = -ENOSPC;
		goto out;
	}
	if (ret) {
		printf("Can't replace data with ciphered data (err = %d)\n", ret);
		goto out;
	}

	/* add non ciphered data size */
	ret = fdt_setprop_u32(fit, image_noffset, "data-size-unciphered", size);
	if (ret == -FDT_ERR_NOSPACE) {
		ret = -ENOSPC;
		goto out;
	}
	if (ret) {
		printf("Can't add unciphered data size (err = %d)\n", ret);
		goto out;
	}

 out:
	return ret;
}

static int
fit_image_process_cipher(const char *keydir, void *keydest, void *fit,
			 const char *image_name, int image_noffset,
			 int node_noffset, const void *data, size_t size,
			 const char *cmdname)
{
	struct image_cipher_info info;
	unsigned char *data_ciphered = NULL;
	int data_ciphered_len;
	int ret;

	memset(&info, 0, sizeof(info));

	ret = fit_image_setup_cipher(&info, keydir, fit, image_name,
				     image_noffset, node_noffset);
	if (ret)
		goto out;

	ret = info.cipher->encrypt(&info, data, size,
				    &data_ciphered, &data_ciphered_len);
	if (ret)
		goto out;

	/*
	 * Write the public key into the supplied FDT file; this might fail
	 * several times, since we try signing with successively increasing
	 * size values
	 * And, if needed, write the iv in the FIT file
	 */
	if (keydest) {
		ret = info.cipher->add_cipher_data(&info, keydest, fit, node_noffset);
		if (ret) {
			printf("Failed to add verification data for cipher '%s' in image '%s'\n",
			       info.keyname, image_name);
			goto out;
		}
	}

	ret = fit_image_write_cipher(fit, image_noffset, node_noffset,
				     data, size,
				     data_ciphered, data_ciphered_len);

 out:
	free(data_ciphered);
	free((void *)info.key);
	free((void *)info.iv);
	return ret;
}

int fit_image_cipher_data(const char *keydir, void *keydest,
			  void *fit, int image_noffset, const char *comment,
			  int require_keys, const char *engine_id,
			  const char *cmdname)
{
	const char *image_name;
	const void *data;
	size_t size;
	int cipher_node_offset, len;

	/* Get image name */
	image_name = fit_get_name(fit, image_noffset, NULL);
	if (!image_name) {
		printf("Can't get image name\n");
		return -1;
	}

	/* Get image data and data length */
	if (fit_image_get_data(fit, image_noffset, &data, &size)) {
		printf("Can't get image data/size\n");
		return -1;
	}

	/*
	 * Don't cipher ciphered data.
	 *
	 * If the data-size-unciphered property is present the data for this
	 * image is already encrypted. This is important as 'mkimage -F' can be
	 * run multiple times on a FIT image.
	 */
	if (fdt_getprop(fit, image_noffset, "data-size-unciphered", &len))
		return 0;
	if (len != -FDT_ERR_NOTFOUND) {
		printf("Failure testing for data-size-unciphered\n");
		return -1;
	}

	/* Process cipher node if present */
	cipher_node_offset = fdt_subnode_offset(fit, image_noffset,
						FIT_CIPHER_NODENAME);
	if (cipher_node_offset == -FDT_ERR_NOTFOUND)
		return 0;
	if (cipher_node_offset < 0) {
		printf("Failure getting cipher node\n");
		return -1;
	}
	if (!IMAGE_ENABLE_ENCRYPT || !keydir)
		return 0;
	return fit_image_process_cipher(keydir, keydest, fit, image_name,
		image_noffset, cipher_node_offset, data, size, cmdname);
}

/**
 * fit_image_add_verification_data() - calculate/set verig. data for image node
 *
 * This adds hash and signature values for an component image node.
 *
 * All existing hash subnodes are checked, if algorithm property is set to
 * one of the supported hash algorithms, hash value is computed and
 * corresponding hash node property is set, for example:
 *
 * Input component image node structure:
 *
 * o image-1 (at image_noffset)
 *   | - data = [binary data]
 *   o hash-1
 *     |- algo = "sha1"
 *
 * Output component image node structure:
 *
 * o image-1 (at image_noffset)
 *   | - data = [binary data]
 *   o hash-1
 *     |- algo = "sha1"
 *     |- value = sha1(data)
 *
 * For signature details, please see doc/uImage.FIT/signature.txt
 *
 * @keydir	Directory containing *.key and *.crt files (or NULL)
 * @keydest	FDT Blob to write public keys into (NULL if none)
 * @fit:	Pointer to the FIT format image header
 * @image_noffset: Requested component image node
 * @comment:	Comment to add to signature nodes
 * @require_keys: Mark all keys as 'required'
 * @engine_id:	Engine to use for signing
 * @return: 0 on success, <0 on failure
 */
int fit_image_add_verification_data(const char *keydir, void *keydest,
		void *fit, int image_noffset, const char *comment,
		int require_keys, const char *engine_id, const char *cmdname)
{
	const char *image_name;
	const void *data;
	size_t size;
	int noffset;

	/* Get image data and data length */
	if (fit_image_get_data(fit, image_noffset, &data, &size)) {
		printf("Can't get image data/size\n");
		return -1;
	}

	image_name = fit_get_name(fit, image_noffset, NULL);

	/* Process all hash subnodes of the component image node */
	for (noffset = fdt_first_subnode(fit, image_noffset);
	     noffset >= 0;
	     noffset = fdt_next_subnode(fit, noffset)) {
		const char *node_name;
		int ret = 0;

		/*
		 * Check subnode name, must be equal to "hash" or "signature".
		 * Multiple hash nodes require unique unit node
		 * names, e.g. hash-1, hash-2, signature-1, etc.
		 */
		node_name = fit_get_name(fit, noffset, NULL);
		if (!strncmp(node_name, FIT_HASH_NODENAME,
			     strlen(FIT_HASH_NODENAME))) {
			ret = fit_image_process_hash(fit, image_name, noffset,
						data, size);
		} else if (IMAGE_ENABLE_SIGN && keydir &&
			   !strncmp(node_name, FIT_SIG_NODENAME,
				strlen(FIT_SIG_NODENAME))) {
			ret = fit_image_process_sig(keydir, keydest,
				fit, image_name, noffset, data, size,
				comment, require_keys, engine_id, cmdname);
		}
		if (ret)
			return ret;
	}

	return 0;
}

struct strlist {
	int count;
	char **strings;
};

static void strlist_init(struct strlist *list)
{
	memset(list, '\0', sizeof(*list));
}

static void strlist_free(struct strlist *list)
{
	int i;

	for (i = 0; i < list->count; i++)
		free(list->strings[i]);
	free(list->strings);
}

static int strlist_add(struct strlist *list, const char *str)
{
	char *dup;

	dup = strdup(str);
	list->strings = realloc(list->strings,
				(list->count + 1) * sizeof(char *));
	if (!list || !str)
		return -1;
	list->strings[list->count++] = dup;

	return 0;
}

static const char *fit_config_get_image_list(void *fit, int noffset,
		int *lenp, int *allow_missingp)
{
	static const char default_list[] = FIT_KERNEL_PROP "\0"
			FIT_FDT_PROP;
	const char *prop;

	/* If there is an "image" property, use that */
	prop = fdt_getprop(fit, noffset, "sign-images", lenp);
	if (prop) {
		*allow_missingp = 0;
		return *lenp ? prop : NULL;
	}

	/* Default image list */
	*allow_missingp = 1;
	*lenp = sizeof(default_list);

	return default_list;
}

static int fit_config_get_hash_list(void *fit, int conf_noffset,
				    int sig_offset, struct strlist *node_inc)
{
	int allow_missing;
	const char *prop, *iname, *end;
	const char *conf_name, *sig_name;
	char name[200], path[200];
	int image_count;
	int ret, len;

	conf_name = fit_get_name(fit, conf_noffset, NULL);
	sig_name = fit_get_name(fit, sig_offset, NULL);

	/*
	 * Build a list of nodes we need to hash. We always need the root
	 * node and the configuration.
	 */
	strlist_init(node_inc);
	snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name);
	if (strlist_add(node_inc, "/") ||
	    strlist_add(node_inc, name))
		goto err_mem;

	/* Get a list of images that we intend to sign */
	prop = fit_config_get_image_list(fit, sig_offset, &len,
					&allow_missing);
	if (!prop)
		return 0;

	/* Locate the images */
	end = prop + len;
	image_count = 0;
	for (iname = prop; iname < end; iname += strlen(iname) + 1) {
		int noffset;
		int image_noffset;
		int hash_count;

		image_noffset = fit_conf_get_prop_node(fit, conf_noffset,
						       iname);
		if (image_noffset < 0) {
			printf("Failed to find image '%s' in  configuration '%s/%s'\n",
			       iname, conf_name, sig_name);
			if (allow_missing)
				continue;

			return -ENOENT;
		}

		ret = fdt_get_path(fit, image_noffset, path, sizeof(path));
		if (ret < 0)
			goto err_path;
		if (strlist_add(node_inc, path))
			goto err_mem;

		snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH,
			 conf_name);

		/* Add all this image's hashes */
		hash_count = 0;
		for (noffset = fdt_first_subnode(fit, image_noffset);
		     noffset >= 0;
		     noffset = fdt_next_subnode(fit, noffset)) {
			const char *name = fit_get_name(fit, noffset, NULL);

			if (strncmp(name, FIT_HASH_NODENAME,
				    strlen(FIT_HASH_NODENAME)))
				continue;
			ret = fdt_get_path(fit, noffset, path, sizeof(path));
			if (ret < 0)
				goto err_path;
			if (strlist_add(node_inc, path))
				goto err_mem;
			hash_count++;
		}

		if (!hash_count) {
			printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n",
			       conf_name, sig_name, iname);
			return -ENOMSG;
		}

		/* Add this image's cipher node if present */
		noffset = fdt_subnode_offset(fit, image_noffset,
					     FIT_CIPHER_NODENAME);
		if (noffset != -FDT_ERR_NOTFOUND) {
			if (noffset < 0) {
				printf("Failed to get cipher node in configuration '%s/%s' image '%s': %s\n",
				       conf_name, sig_name, iname,
				       fdt_strerror(noffset));
				return -EIO;
			}
			ret = fdt_get_path(fit, noffset, path, sizeof(path));
			if (ret < 0)
				goto err_path;
			if (strlist_add(node_inc, path))
				goto err_mem;
		}

		image_count++;
	}

	if (!image_count) {
		printf("Failed to find any images for configuration '%s/%s'\n",
		       conf_name, sig_name);
		return -ENOMSG;
	}

	return 0;

err_mem:
	printf("Out of memory processing configuration '%s/%s'\n", conf_name,
	       sig_name);
	return -ENOMEM;

err_path:
	printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n",
	       iname, conf_name, sig_name, fdt_strerror(ret));
	return -ENOENT;
}

static int fit_config_get_data(void *fit, int conf_noffset, int noffset,
		struct image_region **regionp, int *region_countp,
		char **region_propp, int *region_proplen)
{
	char * const exc_prop[] = {"data"};
	struct strlist node_inc;
	struct image_region *region;
	struct fdt_region fdt_regions[100];
	const char *conf_name, *sig_name;
	char path[200];
	int count, i;
	char *region_prop;
	int ret, len;

	conf_name = fit_get_name(fit, conf_noffset, NULL);
	sig_name = fit_get_name(fit, noffset, NULL);
	debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name);

	/* Get a list of nodes we want to hash */
	ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc);
	if (ret)
		return ret;

	/* Get a list of regions to hash */
	count = fdt_find_regions(fit, node_inc.strings, node_inc.count,
			exc_prop, ARRAY_SIZE(exc_prop),
			fdt_regions, ARRAY_SIZE(fdt_regions),
			path, sizeof(path), 1);
	if (count < 0) {
		printf("Failed to hash configuration '%s/%s': %s\n", conf_name,
		       sig_name, fdt_strerror(ret));
		return -EIO;
	}
	if (count == 0) {
		printf("No data to hash for configuration '%s/%s': %s\n",
		       conf_name, sig_name, fdt_strerror(ret));
		return -EINVAL;
	}

	/* Build our list of data blocks */
	region = fit_region_make_list(fit, fdt_regions, count, NULL);
	if (!region) {
		printf("Out of memory hashing configuration '%s/%s'\n",
		       conf_name, sig_name);
		return -ENOMEM;
	}

	/* Create a list of all hashed properties */
	debug("Hash nodes:\n");
	for (i = len = 0; i < node_inc.count; i++) {
		debug("   %s\n", node_inc.strings[i]);
		len += strlen(node_inc.strings[i]) + 1;
	}
	region_prop = malloc(len);
	if (!region_prop) {
		printf("Out of memory setting up regions for configuration '%s/%s'\n",
		       conf_name, sig_name);
		return -ENOMEM;
	}
	for (i = len = 0; i < node_inc.count;
	     len += strlen(node_inc.strings[i]) + 1, i++)
		strcpy(region_prop + len, node_inc.strings[i]);
	strlist_free(&node_inc);

	*region_countp = count;
	*regionp = region;
	*region_propp = region_prop;
	*region_proplen = len;

	return 0;
}

static int fit_config_process_sig(const char *keydir, void *keydest,
		void *fit, const char *conf_name, int conf_noffset,
		int noffset, const char *comment, int require_keys,
		const char *engine_id, const char *cmdname)
{
	struct image_sign_info info;
	const char *node_name;
	struct image_region *region;
	char *region_prop;
	int region_proplen;
	int region_count;
	uint8_t *value;
	uint value_len;
	int ret;

	node_name = fit_get_name(fit, noffset, NULL);
	if (fit_config_get_data(fit, conf_noffset, noffset, &region,
				&region_count, &region_prop, &region_proplen))
		return -1;

	if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset,
				require_keys ? "conf" : NULL, engine_id))
		return -1;

	ret = info.crypto->sign(&info, region, region_count, &value,
				&value_len);
	free(region);
	if (ret) {
		printf("Failed to sign '%s' signature node in '%s' conf node\n",
		       node_name, conf_name);

		/* We allow keys to be missing */
		if (ret == -ENOENT)
			return 0;
		return -1;
	}

	ret = fit_image_write_sig(fit, noffset, value, value_len, comment,
				region_prop, region_proplen, cmdname);
	if (ret) {
		if (ret == -FDT_ERR_NOSPACE)
			return -ENOSPC;
		printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n",
		       node_name, conf_name, fdt_strerror(ret));
		return -1;
	}
	free(value);
	free(region_prop);

	/* Get keyname again, as FDT has changed and invalidated our pointer */
	info.keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);

	/* Write the public key into the supplied FDT file */
	if (keydest) {
		ret = info.crypto->add_verify_data(&info, keydest);
		if (ret) {
			printf("Failed to add verification data for '%s' signature node in '%s' configuration node\n",
			       node_name, conf_name);
		}
		return ret;
	}

	return 0;
}

static int fit_config_add_verification_data(const char *keydir, void *keydest,
		void *fit, int conf_noffset, const char *comment,
		int require_keys, const char *engine_id, const char *cmdname)
{
	const char *conf_name;
	int noffset;

	conf_name = fit_get_name(fit, conf_noffset, NULL);

	/* Process all hash subnodes of the configuration node */
	for (noffset = fdt_first_subnode(fit, conf_noffset);
	     noffset >= 0;
	     noffset = fdt_next_subnode(fit, noffset)) {
		const char *node_name;
		int ret = 0;

		node_name = fit_get_name(fit, noffset, NULL);
		if (!strncmp(node_name, FIT_SIG_NODENAME,
			     strlen(FIT_SIG_NODENAME))) {
			ret = fit_config_process_sig(keydir, keydest,
				fit, conf_name, conf_noffset, noffset, comment,
				require_keys, engine_id, cmdname);
		}
		if (ret)
			return ret;
	}

	return 0;
}

int fit_cipher_data(const char *keydir, void *keydest, void *fit,
		    const char *comment, int require_keys,
		    const char *engine_id, const char *cmdname)
{
	int images_noffset;
	int noffset;
	int ret;

	/* Find images parent node offset */
	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
	if (images_noffset < 0) {
		printf("Can't find images parent node '%s' (%s)\n",
		       FIT_IMAGES_PATH, fdt_strerror(images_noffset));
		return images_noffset;
	}

	/* Process its subnodes, print out component images details */
	for (noffset = fdt_first_subnode(fit, images_noffset);
	     noffset >= 0;
	     noffset = fdt_next_subnode(fit, noffset)) {
		/*
		 * Direct child node of the images parent node,
		 * i.e. component image node.
		 */
		ret = fit_image_cipher_data(keydir, keydest,
					    fit, noffset, comment,
					    require_keys, engine_id,
					    cmdname);
		if (ret)
			return ret;
	}

	return 0;
}

int fit_add_verification_data(const char *keydir, void *keydest, void *fit,
			      const char *comment, int require_keys,
			      const char *engine_id, const char *cmdname)
{
	int images_noffset, confs_noffset;
	int noffset;
	int ret;

	/* Find images parent node offset */
	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
	if (images_noffset < 0) {
		printf("Can't find images parent node '%s' (%s)\n",
		       FIT_IMAGES_PATH, fdt_strerror(images_noffset));
		return images_noffset;
	}

	/* Process its subnodes, print out component images details */
	for (noffset = fdt_first_subnode(fit, images_noffset);
	     noffset >= 0;
	     noffset = fdt_next_subnode(fit, noffset)) {
		/*
		 * Direct child node of the images parent node,
		 * i.e. component image node.
		 */
		ret = fit_image_add_verification_data(keydir, keydest,
				fit, noffset, comment, require_keys, engine_id,
				cmdname);
		if (ret)
			return ret;
	}

	/* If there are no keys, we can't sign configurations */
	if (!IMAGE_ENABLE_SIGN || !keydir)
		return 0;

	/* Find configurations parent node offset */
	confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
	if (confs_noffset < 0) {
		printf("Can't find images parent node '%s' (%s)\n",
		       FIT_CONFS_PATH, fdt_strerror(confs_noffset));
		return -ENOENT;
	}

	/* Process its subnodes, print out component images details */
	for (noffset = fdt_first_subnode(fit, confs_noffset);
	     noffset >= 0;
	     noffset = fdt_next_subnode(fit, noffset)) {
		ret = fit_config_add_verification_data(keydir, keydest,
						       fit, noffset, comment,
						       require_keys,
						       engine_id, cmdname);
		if (ret)
			return ret;
	}

	return 0;
}

#ifdef CONFIG_FIT_SIGNATURE
int fit_check_sign(const void *fit, const void *key,
		   const char *fit_uname_config)
{
	int cfg_noffset;
	int ret;

	cfg_noffset = fit_conf_get_node(fit, fit_uname_config);
	if (!cfg_noffset)
		return -1;

	printf("Verifying Hash Integrity for node '%s'... ",
	       fdt_get_name(fit, cfg_noffset, NULL));
	ret = fit_config_verify(fit, cfg_noffset);
	if (ret)
		return ret;
	printf("Verified OK, loading images\n");
	ret = bootm_host_load_images(fit, cfg_noffset);

	return ret;
}
#endif