]> git.ipfire.org Git - people/ms/u-boot.git/blame - board/freescale/common/fsl_validate.c
projects / people / ms / u-boot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
armv8: LS1012ARDB: Add QSPI Secure Boot target
[people/ms/u-boot.git] / board / freescale / common / fsl_validate.c
CommitLineData
47151e4b 1/*
2 * Copyright 2015 Freescale Semiconductor, Inc.
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7#include <common.h>
8#include <fsl_validate.h>
9#include <fsl_secboot_err.h>
10#include <fsl_sfp.h>
11#include <fsl_sec.h>
12#include <command.h>
13#include <malloc.h>
14#include <dm/uclass.h>
15#include <u-boot/rsa-mod-exp.h>
16#include <hash.h>
17#include <fsl_secboot_err.h>
9711f528 18#ifdef CONFIG_LS102XA
47151e4b 19#include <asm/arch/immap_ls102xa.h>
20#endif
21
22#define SHA256_BITS 256
23#define SHA256_BYTES (256/8)
24#define SHA256_NIBBLES (256/4)
25#define NUM_HEX_CHARS (sizeof(ulong) * 2)
26
94ba5e41
AB		 27#define CHECK_KEY_LEN(key_len) (((key_len) == 2 * KEY_SIZE_BYTES / 4) || \
28 ((key_len) == 2 * KEY_SIZE_BYTES / 2) || \
29 ((key_len) == 2 * KEY_SIZE_BYTES))
ac55dadb
UA		 30#if defined(CONFIG_FSL_ISBC_KEY_EXT)
31/* Global data structure */
32static struct fsl_secboot_glb glb;
33#endif
94ba5e41 34
47151e4b 35/* This array contains DER value for SHA-256 */
36static const u8 hash_identifier[] = { 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60,
37 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00,
38 0x04, 0x20
39 };
40
41static u8 hash_val[SHA256_BYTES];
fd6dbc98
SJ		 42
43#ifdef CONFIG_ESBC_HDR_LS
44/* New Barker Code for LS ESBC Header */
45static const u8 barker_code[ESBC_BARKER_LEN] = { 0x12, 0x19, 0x20, 0x01 };
46#else
47151e4b 47static const u8 barker_code[ESBC_BARKER_LEN] = { 0x68, 0x39, 0x27, 0x81 };
fd6dbc98 48#endif
47151e4b 49
50void branch_to_self(void) __attribute__ ((noreturn));
51
52/*
53 * This function will put core in infinite loop.
54 * This will be called when the ESBC can not proceed further due
55 * to some unknown errors.
56 */
57void branch_to_self(void)
58{
59 printf("Core is in infinite loop due to errors.\n");
60self:
61 goto self;
62}
63
64#if defined(CONFIG_FSL_ISBC_KEY_EXT)
65static u32 check_ie(struct fsl_secboot_img_priv *img)
66{
ac55dadb 67 if (img->hdr.ie_flag & IE_FLAG_MASK)
47151e4b 68 return 1;
69
70 return 0;
71}
72
73/* This function returns the CSF Header Address of uboot
74 * For MPC85xx based platforms, the LAW mapping for NOR
75 * flash changes in uboot code. Hence the offset needs
76 * to be calculated and added to the new NOR flash base
77 * address
78 */
79#if defined(CONFIG_MPC85xx)
7bcb0eb2 80int get_csf_base_addr(u32 *csf_addr, u32 *flash_base_addr)
47151e4b 81{
82 struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
83 u32 csf_hdr_addr = in_be32(&gur->scratchrw[0]);
84 u32 csf_flash_offset = csf_hdr_addr & ~(CONFIG_SYS_PBI_FLASH_BASE);
7bcb0eb2 85 u32 flash_addr, addr;
47151e4b 86 int found = 0;
87 int i = 0;
88
89 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
90 flash_addr = flash_info[i].start[0];
91 addr = flash_info[i].start[0] + csf_flash_offset;
92 if (memcmp((u8 *)addr, barker_code, ESBC_BARKER_LEN) == 0) {
7bcb0eb2 93 debug("Barker found on addr %x\n", addr);
47151e4b 94 found = 1;
95 break;
96 }
97 }
98
99 if (!found)
100 return -1;
101
102 *csf_addr = addr;
103 *flash_base_addr = flash_addr;
104
105 return 0;
106}
107#else
108/* For platforms like LS1020, correct flash address is present in
109 * the header. So the function reqturns flash base address as 0
110 */
7bcb0eb2 111int get_csf_base_addr(u32 *csf_addr, u32 *flash_base_addr)
47151e4b 112{
113 struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
114 u32 csf_hdr_addr = in_be32(&gur->scratchrw[0]);
115
9711f528
AB		 116 if (memcmp((u8 *)(uintptr_t)csf_hdr_addr,
117 barker_code, ESBC_BARKER_LEN))
47151e4b 118 return -1;
119
120 *csf_addr = csf_hdr_addr;
121 *flash_base_addr = 0;
122 return 0;
123}
124#endif
125
ac55dadb
UA		 126#if defined(CONFIG_ESBC_HDR_LS)
127static int get_ie_info_addr(uintptr_t *ie_addr)
128{
129 struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
130 /* For LS-CH3, the address of IE Table is
131 * stated in Scratch13 and scratch14 of DCFG.
132 * Bootrom validates this table while validating uboot.
133 * DCFG is LE*/
134 *ie_addr = in_le32(&gur->scratchrw[SCRATCH_IE_HIGH_ADR - 1]);
135 *ie_addr = *ie_addr << 32;
136 *ie_addr |= in_le32(&gur->scratchrw[SCRATCH_IE_LOW_ADR - 1]);
137 return 0;
138}
139#else /* CONFIG_ESBC_HDR_LS */
140static int get_ie_info_addr(uintptr_t *ie_addr)
47151e4b 141{
142 struct fsl_secboot_img_hdr *hdr;
143 struct fsl_secboot_sg_table *sg_tbl;
7bcb0eb2 144 u32 flash_base_addr, csf_addr;
47151e4b 145
146 if (get_csf_base_addr(&csf_addr, &flash_base_addr))
147 return -1;
148
9711f528 149 hdr = (struct fsl_secboot_img_hdr *)(uintptr_t)csf_addr;
47151e4b 150
151 /* For SoC's with Trust Architecture v1 with corenet bus
152 * the sg table field in CSF header has absolute address
153 * for sg table in memory. In other Trust Architecture,
154 * this field specifies the offset of sg table from the
155 * base address of CSF Header
156 */
157#if defined(CONFIG_FSL_TRUST_ARCH_v1) && defined(CONFIG_FSL_CORENET)
158 sg_tbl = (struct fsl_secboot_sg_table *)
7bcb0eb2 159 (((u32)hdr->psgtable & ~(CONFIG_SYS_PBI_FLASH_BASE)) +
47151e4b 160 flash_base_addr);
161#else
9711f528 162 sg_tbl = (struct fsl_secboot_sg_table *)(uintptr_t)(csf_addr +
7bcb0eb2 163 (u32)hdr->psgtable);
47151e4b 164#endif
165
166 /* IE Key Table is the first entry in the SG Table */
167#if defined(CONFIG_MPC85xx)
ac55dadb
UA		 168 *ie_addr = (uintptr_t)((sg_tbl->src_addr &
169 ~(CONFIG_SYS_PBI_FLASH_BASE)) +
170 flash_base_addr);
47151e4b 171#else
ac55dadb 172 *ie_addr = (uintptr_t)sg_tbl->src_addr;
47151e4b 173#endif
174
ac55dadb 175 debug("IE Table address is %lx\n", *ie_addr);
47151e4b 176 return 0;
177}
ac55dadb 178#endif /* CONFIG_ESBC_HDR_LS */
47151e4b 179#endif
180
181#ifdef CONFIG_KEY_REVOCATION
182/* This function checks srk_table_flag in header and set/reset srk_flag.*/
183static u32 check_srk(struct fsl_secboot_img_priv *img)
184{
fd6dbc98 185#ifdef CONFIG_ESBC_HDR_LS
ac55dadb
UA		 186 /* In LS, No SRK Flag as SRK is always present if IE not present*/
187#if defined(CONFIG_FSL_ISBC_KEY_EXT)
188 return !check_ie(img);
189#endif
fd6dbc98
SJ		 190 return 1;
191#else
47151e4b 192 if (img->hdr.len_kr.srk_table_flag & SRK_FLAG)
193 return 1;
194
195 return 0;
fd6dbc98 196#endif
47151e4b 197}
198
199/* This function returns ospr's key_revoc values.*/
200static u32 get_key_revoc(void)
201{
202 struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
203 return (sfp_in32(&sfp_regs->ospr) & OSPR_KEY_REVOC_MASK) >>
204 OSPR_KEY_REVOC_SHIFT;
205}
206
207/* This function checks if selected key is revoked or not.*/
208static u32 is_key_revoked(u32 keynum, u32 rev_flag)
209{
210 if (keynum == UNREVOCABLE_KEY)
211 return 0;
212
213 if ((u32)(1 << (ALIGN_REVOC_KEY - keynum)) & rev_flag)
214 return 1;
215
216 return 0;
217}
218
94ba5e41
AB		 219/* It read validates srk_table key lengths.*/
220static u32 read_validate_srk_tbl(struct fsl_secboot_img_priv *img)
47151e4b 221{
222 int i = 0;
94ba5e41
AB		 223 u32 ret, key_num, key_revoc_flag, size;
224 struct fsl_secboot_img_hdr *hdr = &img->hdr;
225 void *esbc = (u8 *)(uintptr_t)img->ehdrloc;
226
227 if ((hdr->len_kr.num_srk == 0) ||
228 (hdr->len_kr.num_srk > MAX_KEY_ENTRIES))
229 return ERROR_ESBC_CLIENT_HEADER_INVALID_SRK_NUM_ENTRY;
230
231 key_num = hdr->len_kr.srk_sel;
232 if (key_num == 0 || key_num > hdr->len_kr.num_srk)
233 return ERROR_ESBC_CLIENT_HEADER_INVALID_KEY_NUM;
234
235 /* Get revoc key from sfp */
236 key_revoc_flag = get_key_revoc();
237 ret = is_key_revoked(key_num, key_revoc_flag);
238 if (ret)
239 return ERROR_ESBC_CLIENT_HEADER_KEY_REVOKED;
240
241 size = hdr->len_kr.num_srk * sizeof(struct srk_table);
242
243 memcpy(&img->srk_tbl, esbc + hdr->srk_tbl_off, size);
244
245 for (i = 0; i < hdr->len_kr.num_srk; i++) {
246 if (!CHECK_KEY_LEN(img->srk_tbl[i].key_len))
47151e4b 247 return ERROR_ESBC_CLIENT_HEADER_INV_SRK_ENTRY_KEYLEN;
248 }
94ba5e41
AB		 249
250 img->key_len = img->srk_tbl[key_num - 1].key_len;
251
252 memcpy(&img->img_key, &(img->srk_tbl[key_num - 1].pkey),
253 img->key_len);
254
47151e4b 255 return 0;
256}
257#endif
258
fd6dbc98 259#ifndef CONFIG_ESBC_HDR_LS
94ba5e41
AB		 260static u32 read_validate_single_key(struct fsl_secboot_img_priv *img)
261{
262 struct fsl_secboot_img_hdr *hdr = &img->hdr;
263 void *esbc = (u8 *)(uintptr_t)img->ehdrloc;
264
265 /* check key length */
266 if (!CHECK_KEY_LEN(hdr->key_len))
267 return ERROR_ESBC_CLIENT_HEADER_KEY_LEN;
268
269 memcpy(&img->img_key, esbc + hdr->pkey, hdr->key_len);
270
271 img->key_len = hdr->key_len;
272
273 return 0;
274}
fd6dbc98 275#endif /* CONFIG_ESBC_HDR_LS */
94ba5e41
AB		 276
277#if defined(CONFIG_FSL_ISBC_KEY_EXT)
ac55dadb
UA		 278
279static void install_ie_tbl(uintptr_t ie_tbl_addr,
280 struct fsl_secboot_img_priv *img)
281{
282 /* Copy IE tbl to Global Data */
283 memcpy(&glb.ie_tbl, (u8 *)ie_tbl_addr, sizeof(struct ie_key_info));
284 img->ie_addr = (uintptr_t)&glb.ie_tbl;
285 glb.ie_addr = img->ie_addr;
286}
287
94ba5e41
AB		 288static u32 read_validate_ie_tbl(struct fsl_secboot_img_priv *img)
289{
290 struct fsl_secboot_img_hdr *hdr = &img->hdr;
291 u32 ie_key_len, ie_revoc_flag, ie_num;
292 struct ie_key_info *ie_info;
293
ac55dadb
UA		 294 if (!img->ie_addr) {
295 if (get_ie_info_addr(&img->ie_addr))
296 return ERROR_IE_TABLE_NOT_FOUND;
297 else
298 install_ie_tbl(img->ie_addr, img);
299 }
300
94ba5e41
AB		 301 ie_info = (struct ie_key_info *)(uintptr_t)img->ie_addr;
302 if (ie_info->num_keys == 0 || ie_info->num_keys > 32)
303 return ERROR_ESBC_CLIENT_HEADER_INVALID_IE_NUM_ENTRY;
304
305 ie_num = hdr->ie_key_sel;
306 if (ie_num == 0 || ie_num > ie_info->num_keys)
307 return ERROR_ESBC_CLIENT_HEADER_INVALID_IE_KEY_NUM;
308
309 ie_revoc_flag = ie_info->key_revok;
310 if ((u32)(1 << (ie_num - 1)) & ie_revoc_flag)
311 return ERROR_ESBC_CLIENT_HEADER_IE_KEY_REVOKED;
312
313 ie_key_len = ie_info->ie_key_tbl[ie_num - 1].key_len;
314
315 if (!CHECK_KEY_LEN(ie_key_len))
316 return ERROR_ESBC_CLIENT_HEADER_INV_IE_ENTRY_KEYLEN;
317
318 memcpy(&img->img_key, &(ie_info->ie_key_tbl[ie_num - 1].pkey),
319 ie_key_len);
320
321 img->key_len = ie_key_len;
322 return 0;
323}
324#endif
325
326
47151e4b 327/* This function return length of public key.*/
328static inline u32 get_key_len(struct fsl_secboot_img_priv *img)
329{
330 return img->key_len;
331}
332
333/*
334 * Handles the ESBC uboot client header verification failure.
335 * This function handles all the errors which might occur in the
336 * parsing and checking of ESBC uboot client header. It will also
337 * set the error bits in the SEC_MON.
338 */
339static void fsl_secboot_header_verification_failure(void)
340{
47151e4b 341 struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
47151e4b 342
343 /* 29th bit of OSPR is ITS */
344 u32 its = sfp_in32(&sfp_regs->ospr) >> 2;
345
b259732d
SG		 346 if (its == 1)
347 set_sec_mon_state(HPSR_SSM_ST_SOFT_FAIL);
348 else
349 set_sec_mon_state(HPSR_SSM_ST_NON_SECURE);
47151e4b 350
351 printf("Generating reset request\n");
352 do_reset(NULL, 0, 0, NULL);
c4666cf6
SJ		 353 /* If reset doesn't coocur, halt execution */
354 do_esbc_halt(NULL, 0, 0, NULL);
47151e4b 355}
356
357/*
358 * Handles the ESBC uboot client image verification failure.
359 * This function handles all the errors which might occur in the
360 * public key hash comparison and signature verification of
361 * ESBC uboot client image. It will also
362 * set the error bits in the SEC_MON.
363 */
364static void fsl_secboot_image_verification_failure(void)
365{
47151e4b 366 struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
47151e4b 367
6ec9aef2 368 u32 its = (sfp_in32(&sfp_regs->ospr) & ITS_MASK) >> ITS_BIT;
47151e4b 369
b259732d
SG		 370 if (its == 1) {
371 set_sec_mon_state(HPSR_SSM_ST_SOFT_FAIL);
372
373 printf("Generating reset request\n");
374 do_reset(NULL, 0, 0, NULL);
375 /* If reset doesn't coocur, halt execution */
376 do_esbc_halt(NULL, 0, 0, NULL);
377
378 } else {
379 set_sec_mon_state(HPSR_SSM_ST_NON_SECURE);
47151e4b 380 }
381}
382
383static void fsl_secboot_bootscript_parse_failure(void)
384{
385 fsl_secboot_header_verification_failure();
386}
387
388/*
389 * Handles the errors in esbc boot.
390 * This function handles all the errors which might occur in the
391 * esbc boot phase. It will call the appropriate api to log the
392 * errors and set the error bits in the SEC_MON.
393 */
394void fsl_secboot_handle_error(int error)
395{
396 const struct fsl_secboot_errcode *e;
397
398 for (e = fsl_secboot_errcodes; e->errcode != ERROR_ESBC_CLIENT_MAX;
399 e++) {
400 if (e->errcode == error)
401 printf("ERROR :: %x :: %s\n", error, e->name);
402 }
403
856b2846
AB		 404 /* If Boot Mode is secure, transition the SNVS state and issue
405 * reset based on type of failure and ITS setting.
406 * If Boot mode is non-secure, return from this function.
407 */
408 if (fsl_check_boot_mode_secure() == 0)
409 return;
410
47151e4b 411 switch (error) {
412 case ERROR_ESBC_CLIENT_HEADER_BARKER:
413 case ERROR_ESBC_CLIENT_HEADER_IMG_SIZE:
414 case ERROR_ESBC_CLIENT_HEADER_KEY_LEN:
415 case ERROR_ESBC_CLIENT_HEADER_SIG_LEN:
416 case ERROR_ESBC_CLIENT_HEADER_KEY_LEN_NOT_TWICE_SIG_LEN:
417 case ERROR_ESBC_CLIENT_HEADER_KEY_MOD_1:
418 case ERROR_ESBC_CLIENT_HEADER_KEY_MOD_2:
419 case ERROR_ESBC_CLIENT_HEADER_SIG_KEY_MOD:
420 case ERROR_ESBC_CLIENT_HEADER_SG_ESBC_EP:
421 case ERROR_ESBC_CLIENT_HEADER_SG_ENTIRES_BAD:
fd6dbc98 422 case ERROR_KEY_TABLE_NOT_FOUND:
47151e4b 423#ifdef CONFIG_KEY_REVOCATION
424 case ERROR_ESBC_CLIENT_HEADER_KEY_REVOKED:
425 case ERROR_ESBC_CLIENT_HEADER_INVALID_SRK_NUM_ENTRY:
426 case ERROR_ESBC_CLIENT_HEADER_INVALID_KEY_NUM:
427 case ERROR_ESBC_CLIENT_HEADER_INV_SRK_ENTRY_KEYLEN:
428#endif
429#if defined(CONFIG_FSL_ISBC_KEY_EXT)
430 /*@fallthrough@*/
431 case ERROR_ESBC_CLIENT_HEADER_IE_KEY_REVOKED:
432 case ERROR_ESBC_CLIENT_HEADER_INVALID_IE_NUM_ENTRY:
433 case ERROR_ESBC_CLIENT_HEADER_INVALID_IE_KEY_NUM:
434 case ERROR_ESBC_CLIENT_HEADER_INV_IE_ENTRY_KEYLEN:
435 case ERROR_IE_TABLE_NOT_FOUND:
436#endif
437 fsl_secboot_header_verification_failure();
438 break;
439 case ERROR_ESBC_SEC_RESET:
440 case ERROR_ESBC_SEC_DEQ:
441 case ERROR_ESBC_SEC_ENQ:
442 case ERROR_ESBC_SEC_DEQ_TO:
443 case ERROR_ESBC_SEC_JOBQ_STATUS:
444 case ERROR_ESBC_CLIENT_HASH_COMPARE_KEY:
445 case ERROR_ESBC_CLIENT_HASH_COMPARE_EM:
446 fsl_secboot_image_verification_failure();
447 break;
448 case ERROR_ESBC_MISSING_BOOTM:
449 fsl_secboot_bootscript_parse_failure();
450 break;
451 case ERROR_ESBC_WRONG_CMD:
452 default:
453 branch_to_self();
454 break;
455 }
456}
457
458static void fsl_secblk_handle_error(int error)
459{
460 switch (error) {
461 case ERROR_ESBC_SEC_ENQ:
462 fsl_secboot_handle_error(ERROR_ESBC_SEC_ENQ);
463 break;
464 case ERROR_ESBC_SEC_DEQ:
465 fsl_secboot_handle_error(ERROR_ESBC_SEC_DEQ);
466 break;
467 case ERROR_ESBC_SEC_DEQ_TO:
468 fsl_secboot_handle_error(ERROR_ESBC_SEC_DEQ_TO);
469 break;
470 default:
471 printf("Job Queue Output status %x\n", error);
472 fsl_secboot_handle_error(ERROR_ESBC_SEC_JOBQ_STATUS);
473 break;
474 }
475}
476
477/*
478 * Calculate hash of key obtained via offset present in ESBC uboot
479 * client hdr. This function calculates the hash of key which is obtained
480 * through offset present in ESBC uboot client header.
481 */
482static int calc_img_key_hash(struct fsl_secboot_img_priv *img)
483{
484 struct hash_algo *algo;
485 void *ctx;
486 int i, srk = 0;
487 int ret = 0;
488 const char *algo_name = "sha256";
489
490 /* Calculate hash of the esbc key */
491 ret = hash_progressive_lookup_algo(algo_name, &algo);
492 if (ret)
493 return ret;
494
495 ret = algo->hash_init(algo, &ctx);
496 if (ret)
497 return ret;
498
499 /* Update hash for ESBC key */
500#ifdef CONFIG_KEY_REVOCATION
501 if (check_srk(img)) {
502 ret = algo->hash_update(algo, ctx,
9711f528
AB		 503 (u8 *)(uintptr_t)(img->ehdrloc + img->hdr.srk_tbl_off),
504 img->hdr.len_kr.num_srk * sizeof(struct srk_table), 1);
47151e4b 505 srk = 1;
506 }
507#endif
508 if (!srk)
509 ret = algo->hash_update(algo, ctx,
510 img->img_key, img->key_len, 1);
511 if (ret)
512 return ret;
513
514 /* Copy hash at destination buffer */
515 ret = algo->hash_finish(algo, ctx, hash_val, algo->digest_size);
516 if (ret)
517 return ret;
518
519 for (i = 0; i < SHA256_BYTES; i++)
520 img->img_key_hash[i] = hash_val[i];
521
522 return 0;
523}
524
525/*
526 * Calculate hash of ESBC hdr and ESBC. This function calculates the
527 * single hash of ESBC header and ESBC image. If SG flag is on, all
528 * SG entries are also hashed alongwith the complete SG table.
529 */
530static int calc_esbchdr_esbc_hash(struct fsl_secboot_img_priv *img)
531{
532 struct hash_algo *algo;
533 void *ctx;
534 int ret = 0;
535 int key_hash = 0;
536 const char *algo_name = "sha256";
537
538 /* Calculate the hash of the ESBC */
539 ret = hash_progressive_lookup_algo(algo_name, &algo);
540 if (ret)
541 return ret;
542
543 ret = algo->hash_init(algo, &ctx);
544 /* Copy hash at destination buffer */
545 if (ret)
546 return ret;
547
548 /* Update hash for CSF Header */
549 ret = algo->hash_update(algo, ctx,
550 (u8 *)&img->hdr, sizeof(struct fsl_secboot_img_hdr), 0);
551 if (ret)
552 return ret;
553
554 /* Update the hash with that of srk table if srk flag is 1
555 * If IE Table is selected, key is not added in the hash
556 * If neither srk table nor IE key table available, add key
557 * from header in the hash calculation
558 */
559#ifdef CONFIG_KEY_REVOCATION
560 if (check_srk(img)) {
561 ret = algo->hash_update(algo, ctx,
9711f528
AB		 562 (u8 *)(uintptr_t)(img->ehdrloc + img->hdr.srk_tbl_off),
563 img->hdr.len_kr.num_srk * sizeof(struct srk_table), 0);
47151e4b 564 key_hash = 1;
565 }
566#endif
567#if defined(CONFIG_FSL_ISBC_KEY_EXT)
568 if (!key_hash && check_ie(img))
569 key_hash = 1;
570#endif
fd6dbc98
SJ		 571#ifndef CONFIG_ESBC_HDR_LS
572/* No single key support in LS ESBC header */
573 if (!key_hash) {
47151e4b 574 ret = algo->hash_update(algo, ctx,
575 img->img_key, img->hdr.key_len, 0);
fd6dbc98
SJ		 576 key_hash = 1;
577 }
578#endif
47151e4b 579 if (ret)
580 return ret;
fd6dbc98
SJ		 581 if (!key_hash)
582 return ERROR_KEY_TABLE_NOT_FOUND;
47151e4b 583
584 /* Update hash for actual Image */
585 ret = algo->hash_update(algo, ctx,
85bb3896 586 (u8 *)(*(img->img_addr_ptr)), img->img_size, 1);
47151e4b 587 if (ret)
588 return ret;
589
590 /* Copy hash at destination buffer */
591 ret = algo->hash_finish(algo, ctx, hash_val, algo->digest_size);
592 if (ret)
593 return ret;
594
595 return 0;
596}
597
598/*
599 * Construct encoded hash EM' wrt PKCSv1.5. This function calculates the
600 * pointers for padding, DER value and hash. And finally, constructs EM'
601 * which includes hash of complete CSF header and ESBC image. If SG flag
602 * is on, hash of SG table and entries is also included.
603 */
604static void construct_img_encoded_hash_second(struct fsl_secboot_img_priv *img)
605{
606 /*
607 * RSA PKCSv1.5 encoding format for encoded message is below
608 * EM = 0x0 || 0x1 || PS || 0x0 || DER || Hash
609 * PS is Padding String
610 * DER is DER value for SHA-256
611 * Hash is SHA-256 hash
612 * *********************************************************
613 * representative points to first byte of EM initially and is
614 * filled with 0x0
615 * representative is incremented by 1 and second byte is filled
616 * with 0x1
617 * padding points to third byte of EM
618 * digest points to full length of EM - 32 bytes
619 * hash_id (DER value) points to 19 bytes before pDigest
620 * separator is one byte which separates padding and DER
621 */
622
623 size_t len;
624 u8 *representative;
625 u8 *padding, *digest;
626 u8 *hash_id, *separator;
627 int i;
628
629 len = (get_key_len(img) / 2) - 1;
630 representative = img->img_encoded_hash_second;
631 representative[0] = 0;
632 representative[1] = 1; /* block type 1 */
633
634 padding = &representative[2];
635 digest = &representative[1] + len - 32;
636 hash_id = digest - sizeof(hash_identifier);
637 separator = hash_id - 1;
638
639 /* fill padding area pointed by padding with 0xff */
640 memset(padding, 0xff, separator - padding);
641
642 /* fill byte pointed by separator */
643 *separator = 0;
644
645 /* fill SHA-256 DER value pointed by HashId */
646 memcpy(hash_id, hash_identifier, sizeof(hash_identifier));
647
648 /* fill hash pointed by Digest */
649 for (i = 0; i < SHA256_BYTES; i++)
650 digest[i] = hash_val[i];
651}
652
653/*
654 * Reads and validates the ESBC client header.
655 * This function reads key and signature from the ESBC client header.
656 * If Scatter/Gather flag is on, lengths and offsets of images
657 * present as SG entries are also read. This function also checks
658 * whether the header is valid or not.
659 */
660static int read_validate_esbc_client_header(struct fsl_secboot_img_priv *img)
661{
47151e4b 662 struct fsl_secboot_img_hdr *hdr = &img->hdr;
9711f528 663 void *esbc = (u8 *)(uintptr_t)img->ehdrloc;
47151e4b 664 u8 *k, *s;
94ba5e41
AB		 665 u32 ret = 0;
666
47151e4b 667 int key_found = 0;
668
669 /* check barker code */
670 if (memcmp(hdr->barker, barker_code, ESBC_BARKER_LEN))
671 return ERROR_ESBC_CLIENT_HEADER_BARKER;
672
b055a0fd
AB		 673 /* If Image Address is not passed as argument to function,
674 * then Address and Size must be read from the Header.
675 */
85bb3896 676 if (*(img->img_addr_ptr) == 0) {
b055a0fd 677 #ifdef CONFIG_ESBC_ADDR_64BIT
85bb3896 678 *(img->img_addr_ptr) = hdr->pimg64;
b055a0fd 679 #else
85bb3896 680 *(img->img_addr_ptr) = hdr->pimg;
b055a0fd
AB		 681 #endif
682 }
683
47151e4b 684 if (!hdr->img_size)
685 return ERROR_ESBC_CLIENT_HEADER_IMG_SIZE;
686
b055a0fd
AB		 687 img->img_size = hdr->img_size;
688
47151e4b 689 /* Key checking*/
690#ifdef CONFIG_KEY_REVOCATION
691 if (check_srk(img)) {
94ba5e41 692 ret = read_validate_srk_tbl(img);
47151e4b 693 if (ret != 0)
694 return ret;
47151e4b 695 key_found = 1;
696 }
697#endif
698
699#if defined(CONFIG_FSL_ISBC_KEY_EXT)
700 if (!key_found && check_ie(img)) {
94ba5e41
AB		 701 ret = read_validate_ie_tbl(img);
702 if (ret != 0)
703 return ret;
47151e4b 704 key_found = 1;
705 }
706#endif
fd6dbc98
SJ		 707#ifndef CONFIG_ESBC_HDR_LS
708/* Single Key Feature not available in LS ESBC Header */
47151e4b 709 if (key_found == 0) {
94ba5e41
AB		 710 ret = read_validate_single_key(img);
711 if (ret != 0)
712 return ret;
47151e4b 713 key_found = 1;
714 }
fd6dbc98
SJ		 715#endif
716 if (!key_found)
717 return ERROR_KEY_TABLE_NOT_FOUND;
47151e4b 718
719 /* check signaure */
720 if (get_key_len(img) == 2 * hdr->sign_len) {
721 /* check signature length */
722 if (!((hdr->sign_len == KEY_SIZE_BYTES / 4) ||
723 (hdr->sign_len == KEY_SIZE_BYTES / 2) ||
724 (hdr->sign_len == KEY_SIZE_BYTES)))
725 return ERROR_ESBC_CLIENT_HEADER_SIG_LEN;
726 } else {
727 return ERROR_ESBC_CLIENT_HEADER_KEY_LEN_NOT_TWICE_SIG_LEN;
728 }
729
730 memcpy(&img->img_sign, esbc + hdr->psign, hdr->sign_len);
fd6dbc98
SJ		 731/* No SG support in LS-CH3 */
732#ifndef CONFIG_ESBC_HDR_LS
47151e4b 733 /* No SG support */
734 if (hdr->sg_flag)
735 return ERROR_ESBC_CLIENT_HEADER_SG;
fd6dbc98 736#endif
47151e4b 737
738 /* modulus most significant bit should be set */
739 k = (u8 *)&img->img_key;
740
741 if ((k[0] & 0x80) == 0)
742 return ERROR_ESBC_CLIENT_HEADER_KEY_MOD_1;
743
744 /* modulus value should be odd */
745 if ((k[get_key_len(img) / 2 - 1] & 0x1) == 0)
746 return ERROR_ESBC_CLIENT_HEADER_KEY_MOD_2;
747
748 /* Check signature value < modulus value */
749 s = (u8 *)&img->img_sign;
750
751 if (!(memcmp(s, k, hdr->sign_len) < 0))
752 return ERROR_ESBC_CLIENT_HEADER_SIG_KEY_MOD;
753
754 return ESBC_VALID_HDR;
755}
756
757static inline int str2longbe(const char *p, ulong *num)
758{
759 char *endptr;
760 ulong tmp;
761
762 if (!p) {
763 return 0;
764 } else {
765 tmp = simple_strtoul(p, &endptr, 16);
766 if (sizeof(ulong) == 4)
767 *num = cpu_to_be32(tmp);
768 else
769 *num = cpu_to_be64(tmp);
770 }
771
772 return *p != '\0' && *endptr == '\0';
773}
6629261d
AB		 774/* Function to calculate the ESBC Image Hash
775 * and hash from Digital signature.
776 * The Two hash's are compared to yield the
777 * result of signature validation.
778 */
779static int calculate_cmp_img_sig(struct fsl_secboot_img_priv *img)
780{
781 int ret;
782 uint32_t key_len;
783 struct key_prop prop;
784#if !defined(USE_HOSTCC)
785 struct udevice *mod_exp_dev;
786#endif
787 ret = calc_esbchdr_esbc_hash(img);
788 if (ret)
789 return ret;
790
791 /* Construct encoded hash EM' wrt PKCSv1.5 */
792 construct_img_encoded_hash_second(img);
793
794 /* Fill prop structure for public key */
795 memset(&prop, 0, sizeof(struct key_prop));
796 key_len = get_key_len(img) / 2;
797 prop.modulus = img->img_key;
798 prop.public_exponent = img->img_key + key_len;
799 prop.num_bits = key_len * 8;
800 prop.exp_len = key_len;
801
802 ret = uclass_get_device(UCLASS_MOD_EXP, 0, &mod_exp_dev);
803 if (ret) {
804 printf("RSA: Can't find Modular Exp implementation\n");
805 return -EINVAL;
806 }
807
808 ret = rsa_mod_exp(mod_exp_dev, img->img_sign, img->hdr.sign_len,
809 &prop, img->img_encoded_hash);
810 if (ret)
811 return ret;
812
813 /*
814 * compare the encoded messages EM' and EM wrt RSA PKCSv1.5
815 * memcmp returns zero on success
816 * memcmp returns non-zero on failure
817 */
818 ret = memcmp(&img->img_encoded_hash_second, &img->img_encoded_hash,
819 img->hdr.sign_len);
820
821 if (ret)
822 return ERROR_ESBC_CLIENT_HASH_COMPARE_EM;
823
824 return 0;
825}
ac55dadb
UA		 826/* Function to initialize img priv and global data structure
827 */
828static int secboot_init(struct fsl_secboot_img_priv **img_ptr)
829{
830 *img_ptr = malloc(sizeof(struct fsl_secboot_img_priv));
831
832 struct fsl_secboot_img_priv *img = *img_ptr;
833
834 if (!img)
835 return -ENOMEM;
836 memset(img, 0, sizeof(struct fsl_secboot_img_priv));
837
838#if defined(CONFIG_FSL_ISBC_KEY_EXT)
839 if (glb.ie_addr)
840 img->ie_addr = glb.ie_addr;
841#endif
842 return 0;
843}
844
845
85bb3896
SJ		 846/* haddr - Address of the header of image to be validated.
847 * arg_hash_str - Option hash string. If provided, this
1cc0a9f4 848 * overrides the key hash in the SFP fuses.
85bb3896 849 * img_addr_ptr - Optional pointer to address of image to be validated.
1cc0a9f4 850 * If non zero addr, this overrides the addr of image in header,
85bb3896
SJ		 851 * otherwise updated to image addr in header.
852 * Acts as both input and output of function.
853 * This pointer shouldn't be NULL.
854 */
b055a0fd 855int fsl_secboot_validate(uintptr_t haddr, char *arg_hash_str,
85bb3896 856 uintptr_t *img_addr_ptr)
47151e4b 857{
858 struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
859 ulong hash[SHA256_BYTES/sizeof(ulong)];
860 char hash_str[NUM_HEX_CHARS + 1];
47151e4b 861 struct fsl_secboot_img_priv *img;
862 struct fsl_secboot_img_hdr *hdr;
863 void *esbc;
864 int ret, i, hash_cmd = 0;
865 u32 srk_hash[8];
47151e4b 866
bc71f926
AB		 867 if (arg_hash_str != NULL) {
868 const char *cp = arg_hash_str;
47151e4b 869 int i = 0;
870
871 if (*cp == '0' && *(cp + 1) == 'x')
872 cp += 2;
873
874 /* The input string expected is in hex, where
875 * each 4 bits would be represented by a hex
876 * sha256 hash is 256 bits long, which would mean
877 * num of characters = 256 / 4
878 */
879 if (strlen(cp) != SHA256_NIBBLES) {
880 printf("%s is not a 256 bits hex string as expected\n",
bc71f926 881 arg_hash_str);
47151e4b 882 return -1;
883 }
884
885 for (i = 0; i < sizeof(hash)/sizeof(ulong); i++) {
886 strncpy(hash_str, cp + (i * NUM_HEX_CHARS),
887 NUM_HEX_CHARS);
888 hash_str[NUM_HEX_CHARS] = '\0';
889 if (!str2longbe(hash_str, &hash[i])) {
890 printf("%s is not a 256 bits hex string ",
bc71f926 891 arg_hash_str);
47151e4b 892 return -1;
893 }
894 }
895
896 hash_cmd = 1;
897 }
898
ac55dadb
UA		 899 ret = secboot_init(&img);
900 if (ret)
901 goto exit;
47151e4b 902
b055a0fd 903 /* Update the information in Private Struct */
47151e4b 904 hdr = &img->hdr;
bc71f926 905 img->ehdrloc = haddr;
85bb3896 906 img->img_addr_ptr = img_addr_ptr;
b055a0fd 907 esbc = (u8 *)img->ehdrloc;
47151e4b 908
909 memcpy(hdr, esbc, sizeof(struct fsl_secboot_img_hdr));
910
911 /* read and validate esbc header */
912 ret = read_validate_esbc_client_header(img);
913
914 if (ret != ESBC_VALID_HDR) {
915 fsl_secboot_handle_error(ret);
916 goto exit;
917 }
918
919 /* SRKH present in SFP */
920 for (i = 0; i < NUM_SRKH_REGS; i++)
921 srk_hash[i] = srk_in32(&sfp_regs->srk_hash[i]);
922
923 /*
924 * Calculate hash of key obtained via offset present in
925 * ESBC uboot client hdr
926 */
927 ret = calc_img_key_hash(img);
928 if (ret) {
929 fsl_secblk_handle_error(ret);
930 goto exit;
931 }
932
933 /* Compare hash obtained above with SRK hash present in SFP */
934 if (hash_cmd)
935 ret = memcmp(&hash, &img->img_key_hash, SHA256_BYTES);
936 else
937 ret = memcmp(srk_hash, img->img_key_hash, SHA256_BYTES);
938
939#if defined(CONFIG_FSL_ISBC_KEY_EXT)
940 if (!hash_cmd && check_ie(img))
941 ret = 0;
942#endif
943
944 if (ret != 0) {
945 fsl_secboot_handle_error(ERROR_ESBC_CLIENT_HASH_COMPARE_KEY);
946 goto exit;
947 }
948
6629261d 949 ret = calculate_cmp_img_sig(img);
47151e4b 950 if (ret) {
6629261d 951 fsl_secboot_handle_error(ret);
47151e4b 952 goto exit;
953 }
954
47151e4b 955exit:
ac55dadb
UA		 956 /* Free Img as it was malloc'ed*/
957 free(img);
bc71f926 958 return ret;
47151e4b 959}
"Das U-Boot" Source Tree