--- /dev/null
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <fsl_validate.h>
+#include <fsl_secboot_err.h>
+#include <fsl_sfp.h>
+#include <fsl_sec.h>
+#include <command.h>
+#include <malloc.h>
+#include <dm/uclass.h>
+#include <u-boot/rsa-mod-exp.h>
+#include <hash.h>
+#include <fsl_secboot_err.h>
+#ifndef CONFIG_MPC85xx
+#include <asm/arch/immap_ls102xa.h>
+#endif
+
+#define SHA256_BITS 256
+#define SHA256_BYTES (256/8)
+#define SHA256_NIBBLES (256/4)
+#define NUM_HEX_CHARS (sizeof(ulong) * 2)
+
+/* This array contains DER value for SHA-256 */
+static const u8 hash_identifier[] = { 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60,
+ 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00,
+ 0x04, 0x20
+ };
+
+static u8 hash_val[SHA256_BYTES];
+static const u8 barker_code[ESBC_BARKER_LEN] = { 0x68, 0x39, 0x27, 0x81 };
+
+void branch_to_self(void) __attribute__ ((noreturn));
+
+/*
+ * This function will put core in infinite loop.
+ * This will be called when the ESBC can not proceed further due
+ * to some unknown errors.
+ */
+void branch_to_self(void)
+{
+ printf("Core is in infinite loop due to errors.\n");
+self:
+ goto self;
+}
+
+#if defined(CONFIG_FSL_ISBC_KEY_EXT)
+static u32 check_ie(struct fsl_secboot_img_priv *img)
+{
+ if (img->hdr.ie_flag)
+ return 1;
+
+ return 0;
+}
+
+/* This function returns the CSF Header Address of uboot
+ * For MPC85xx based platforms, the LAW mapping for NOR
+ * flash changes in uboot code. Hence the offset needs
+ * to be calculated and added to the new NOR flash base
+ * address
+ */
+#if defined(CONFIG_MPC85xx)
+int get_csf_base_addr(ulong *csf_addr, ulong *flash_base_addr)
+{
+ struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+ u32 csf_hdr_addr = in_be32(&gur->scratchrw[0]);
+ u32 csf_flash_offset = csf_hdr_addr & ~(CONFIG_SYS_PBI_FLASH_BASE);
+ ulong flash_addr, addr;
+ int found = 0;
+ int i = 0;
+
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ flash_addr = flash_info[i].start[0];
+ addr = flash_info[i].start[0] + csf_flash_offset;
+ if (memcmp((u8 *)addr, barker_code, ESBC_BARKER_LEN) == 0) {
+ debug("Barker found on addr %lx\n", addr);
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found)
+ return -1;
+
+ *csf_addr = addr;
+ *flash_base_addr = flash_addr;
+
+ return 0;
+}
+#else
+/* For platforms like LS1020, correct flash address is present in
+ * the header. So the function reqturns flash base address as 0
+ */
+int get_csf_base_addr(ulong *csf_addr, ulong *flash_base_addr)
+{
+ struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
+ u32 csf_hdr_addr = in_be32(&gur->scratchrw[0]);
+
+ if (memcmp((u8 *)csf_hdr_addr, barker_code, ESBC_BARKER_LEN))
+ return -1;
+
+ *csf_addr = csf_hdr_addr;
+ *flash_base_addr = 0;
+ return 0;
+}
+#endif
+
+static int get_ie_info_addr(ulong *ie_addr)
+{
+ struct fsl_secboot_img_hdr *hdr;
+ struct fsl_secboot_sg_table *sg_tbl;
+ ulong flash_base_addr, csf_addr;
+
+ if (get_csf_base_addr(&csf_addr, &flash_base_addr))
+ return -1;
+
+ hdr = (struct fsl_secboot_img_hdr *)csf_addr;
+
+ /* For SoC's with Trust Architecture v1 with corenet bus
+ * the sg table field in CSF header has absolute address
+ * for sg table in memory. In other Trust Architecture,
+ * this field specifies the offset of sg table from the
+ * base address of CSF Header
+ */
+#if defined(CONFIG_FSL_TRUST_ARCH_v1) && defined(CONFIG_FSL_CORENET)
+ sg_tbl = (struct fsl_secboot_sg_table *)
+ (((ulong)hdr->psgtable & ~(CONFIG_SYS_PBI_FLASH_BASE)) +
+ flash_base_addr);
+#else
+ sg_tbl = (struct fsl_secboot_sg_table *)(csf_addr +
+ (ulong)hdr->psgtable);
+#endif
+
+ /* IE Key Table is the first entry in the SG Table */
+#if defined(CONFIG_MPC85xx)
+ *ie_addr = (sg_tbl->src_addr & ~(CONFIG_SYS_PBI_FLASH_BASE)) +
+ flash_base_addr;
+#else
+ *ie_addr = sg_tbl->src_addr;
+#endif
+
+ debug("IE Table address is %lx\n", *ie_addr);
+ return 0;
+}
+
+#endif
+
+#ifdef CONFIG_KEY_REVOCATION
+/* This function checks srk_table_flag in header and set/reset srk_flag.*/
+static u32 check_srk(struct fsl_secboot_img_priv *img)
+{
+ if (img->hdr.len_kr.srk_table_flag & SRK_FLAG)
+ return 1;
+
+ return 0;
+}
+
+/* This function returns ospr's key_revoc values.*/
+static u32 get_key_revoc(void)
+{
+ struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
+ return (sfp_in32(&sfp_regs->ospr) & OSPR_KEY_REVOC_MASK) >>
+ OSPR_KEY_REVOC_SHIFT;
+}
+
+/* This function checks if selected key is revoked or not.*/
+static u32 is_key_revoked(u32 keynum, u32 rev_flag)
+{
+ if (keynum == UNREVOCABLE_KEY)
+ return 0;
+
+ if ((u32)(1 << (ALIGN_REVOC_KEY - keynum)) & rev_flag)
+ return 1;
+
+ return 0;
+}
+
+/* It validates srk_table key lengths.*/
+static u32 validate_srk_tbl(struct srk_table *tbl, u32 num_entries)
+{
+ int i = 0;
+ for (i = 0; i < num_entries; i++) {
+ if (!((tbl[i].key_len == 2 * KEY_SIZE_BYTES/4) ||
+ (tbl[i].key_len == 2 * KEY_SIZE_BYTES/2) ||
+ (tbl[i].key_len == 2 * KEY_SIZE_BYTES)))
+ return ERROR_ESBC_CLIENT_HEADER_INV_SRK_ENTRY_KEYLEN;
+ }
+ return 0;
+}
+#endif
+
+/* This function return length of public key.*/
+static inline u32 get_key_len(struct fsl_secboot_img_priv *img)
+{
+ return img->key_len;
+}
+
+/*
+ * Handles the ESBC uboot client header verification failure.
+ * This function handles all the errors which might occur in the
+ * parsing and checking of ESBC uboot client header. It will also
+ * set the error bits in the SEC_MON.
+ */
+static void fsl_secboot_header_verification_failure(void)
+{
+ struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
+ (CONFIG_SYS_SEC_MON_ADDR);
+ struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
+ u32 sts = sec_mon_in32(&sec_mon_regs->hp_stat);
+
+ /* 29th bit of OSPR is ITS */
+ u32 its = sfp_in32(&sfp_regs->ospr) >> 2;
+
+ /*
+ * Read the SEC_MON status register
+ * Read SSM_ST field
+ */
+ sts = sec_mon_in32(&sec_mon_regs->hp_stat);
+ if ((sts & HPSR_SSM_ST_MASK) == HPSR_SSM_ST_TRUST) {
+ if (its == 1)
+ change_sec_mon_state(HPSR_SSM_ST_TRUST,
+ HPSR_SSM_ST_SOFT_FAIL);
+ else
+ change_sec_mon_state(HPSR_SSM_ST_TRUST,
+ HPSR_SSM_ST_NON_SECURE);
+ }
+
+ printf("Generating reset request\n");
+ do_reset(NULL, 0, 0, NULL);
+}
+
+/*
+ * Handles the ESBC uboot client image verification failure.
+ * This function handles all the errors which might occur in the
+ * public key hash comparison and signature verification of
+ * ESBC uboot client image. It will also
+ * set the error bits in the SEC_MON.
+ */
+static void fsl_secboot_image_verification_failure(void)
+{
+ struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
+ (CONFIG_SYS_SEC_MON_ADDR);
+ struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
+ u32 sts = sec_mon_in32(&sec_mon_regs->hp_stat);
+
+ u32 its = sfp_in32(&sfp_regs->ospr) & ITS_MASK >> ITS_BIT;
+
+ /*
+ * Read the SEC_MON status register
+ * Read SSM_ST field
+ */
+ sts = sec_mon_in32(&sec_mon_regs->hp_stat);
+ if ((sts & HPSR_SSM_ST_MASK) == HPSR_SSM_ST_TRUST) {
+ if (its == 1) {
+ change_sec_mon_state(HPSR_SSM_ST_TRUST,
+ HPSR_SSM_ST_SOFT_FAIL);
+
+ printf("Generating reset request\n");
+ do_reset(NULL, 0, 0, NULL);
+ } else {
+ change_sec_mon_state(HPSR_SSM_ST_TRUST,
+ HPSR_SSM_ST_NON_SECURE);
+ }
+ }
+}
+
+static void fsl_secboot_bootscript_parse_failure(void)
+{
+ fsl_secboot_header_verification_failure();
+}
+
+/*
+ * Handles the errors in esbc boot.
+ * This function handles all the errors which might occur in the
+ * esbc boot phase. It will call the appropriate api to log the
+ * errors and set the error bits in the SEC_MON.
+ */
+void fsl_secboot_handle_error(int error)
+{
+ const struct fsl_secboot_errcode *e;
+
+ for (e = fsl_secboot_errcodes; e->errcode != ERROR_ESBC_CLIENT_MAX;
+ e++) {
+ if (e->errcode == error)
+ printf("ERROR :: %x :: %s\n", error, e->name);
+ }
+
+ switch (error) {
+ case ERROR_ESBC_CLIENT_HEADER_BARKER:
+ case ERROR_ESBC_CLIENT_HEADER_IMG_SIZE:
+ case ERROR_ESBC_CLIENT_HEADER_KEY_LEN:
+ case ERROR_ESBC_CLIENT_HEADER_SIG_LEN:
+ case ERROR_ESBC_CLIENT_HEADER_KEY_LEN_NOT_TWICE_SIG_LEN:
+ case ERROR_ESBC_CLIENT_HEADER_KEY_MOD_1:
+ case ERROR_ESBC_CLIENT_HEADER_KEY_MOD_2:
+ case ERROR_ESBC_CLIENT_HEADER_SIG_KEY_MOD:
+ case ERROR_ESBC_CLIENT_HEADER_SG_ESBC_EP:
+ case ERROR_ESBC_CLIENT_HEADER_SG_ENTIRES_BAD:
+#ifdef CONFIG_KEY_REVOCATION
+ case ERROR_ESBC_CLIENT_HEADER_KEY_REVOKED:
+ case ERROR_ESBC_CLIENT_HEADER_INVALID_SRK_NUM_ENTRY:
+ case ERROR_ESBC_CLIENT_HEADER_INVALID_KEY_NUM:
+ case ERROR_ESBC_CLIENT_HEADER_INV_SRK_ENTRY_KEYLEN:
+#endif
+#if defined(CONFIG_FSL_ISBC_KEY_EXT)
+ /*@fallthrough@*/
+ case ERROR_ESBC_CLIENT_HEADER_IE_KEY_REVOKED:
+ case ERROR_ESBC_CLIENT_HEADER_INVALID_IE_NUM_ENTRY:
+ case ERROR_ESBC_CLIENT_HEADER_INVALID_IE_KEY_NUM:
+ case ERROR_ESBC_CLIENT_HEADER_INV_IE_ENTRY_KEYLEN:
+ case ERROR_IE_TABLE_NOT_FOUND:
+#endif
+ fsl_secboot_header_verification_failure();
+ break;
+ case ERROR_ESBC_SEC_RESET:
+ case ERROR_ESBC_SEC_DEQ:
+ case ERROR_ESBC_SEC_ENQ:
+ case ERROR_ESBC_SEC_DEQ_TO:
+ case ERROR_ESBC_SEC_JOBQ_STATUS:
+ case ERROR_ESBC_CLIENT_HASH_COMPARE_KEY:
+ case ERROR_ESBC_CLIENT_HASH_COMPARE_EM:
+ fsl_secboot_image_verification_failure();
+ break;
+ case ERROR_ESBC_MISSING_BOOTM:
+ fsl_secboot_bootscript_parse_failure();
+ break;
+ case ERROR_ESBC_WRONG_CMD:
+ default:
+ branch_to_self();
+ break;
+ }
+}
+
+static void fsl_secblk_handle_error(int error)
+{
+ switch (error) {
+ case ERROR_ESBC_SEC_ENQ:
+ fsl_secboot_handle_error(ERROR_ESBC_SEC_ENQ);
+ break;
+ case ERROR_ESBC_SEC_DEQ:
+ fsl_secboot_handle_error(ERROR_ESBC_SEC_DEQ);
+ break;
+ case ERROR_ESBC_SEC_DEQ_TO:
+ fsl_secboot_handle_error(ERROR_ESBC_SEC_DEQ_TO);
+ break;
+ default:
+ printf("Job Queue Output status %x\n", error);
+ fsl_secboot_handle_error(ERROR_ESBC_SEC_JOBQ_STATUS);
+ break;
+ }
+}
+
+/*
+ * Calculate hash of key obtained via offset present in ESBC uboot
+ * client hdr. This function calculates the hash of key which is obtained
+ * through offset present in ESBC uboot client header.
+ */
+static int calc_img_key_hash(struct fsl_secboot_img_priv *img)
+{
+ struct hash_algo *algo;
+ void *ctx;
+ int i, srk = 0;
+ int ret = 0;
+ const char *algo_name = "sha256";
+
+ /* Calculate hash of the esbc key */
+ ret = hash_progressive_lookup_algo(algo_name, &algo);
+ if (ret)
+ return ret;
+
+ ret = algo->hash_init(algo, &ctx);
+ if (ret)
+ return ret;
+
+ /* Update hash for ESBC key */
+#ifdef CONFIG_KEY_REVOCATION
+ if (check_srk(img)) {
+ ret = algo->hash_update(algo, ctx,
+ (u8 *)(img->ehdrloc + img->hdr.srk_tbl_off),
+ img->hdr.len_kr.num_srk * sizeof(struct srk_table), 1);
+ srk = 1;
+ }
+#endif
+ if (!srk)
+ ret = algo->hash_update(algo, ctx,
+ img->img_key, img->key_len, 1);
+ if (ret)
+ return ret;
+
+ /* Copy hash at destination buffer */
+ ret = algo->hash_finish(algo, ctx, hash_val, algo->digest_size);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < SHA256_BYTES; i++)
+ img->img_key_hash[i] = hash_val[i];
+
+ return 0;
+}
+
+/*
+ * Calculate hash of ESBC hdr and ESBC. This function calculates the
+ * single hash of ESBC header and ESBC image. If SG flag is on, all
+ * SG entries are also hashed alongwith the complete SG table.
+ */
+static int calc_esbchdr_esbc_hash(struct fsl_secboot_img_priv *img)
+{
+ struct hash_algo *algo;
+ void *ctx;
+ int ret = 0;
+ int key_hash = 0;
+ const char *algo_name = "sha256";
+
+ /* Calculate the hash of the ESBC */
+ ret = hash_progressive_lookup_algo(algo_name, &algo);
+ if (ret)
+ return ret;
+
+ ret = algo->hash_init(algo, &ctx);
+ /* Copy hash at destination buffer */
+ if (ret)
+ return ret;
+
+ /* Update hash for CSF Header */
+ ret = algo->hash_update(algo, ctx,
+ (u8 *)&img->hdr, sizeof(struct fsl_secboot_img_hdr), 0);
+ if (ret)
+ return ret;
+
+ /* Update the hash with that of srk table if srk flag is 1
+ * If IE Table is selected, key is not added in the hash
+ * If neither srk table nor IE key table available, add key
+ * from header in the hash calculation
+ */
+#ifdef CONFIG_KEY_REVOCATION
+ if (check_srk(img)) {
+ ret = algo->hash_update(algo, ctx,
+ (u8 *)(img->ehdrloc + img->hdr.srk_tbl_off),
+ img->hdr.len_kr.num_srk * sizeof(struct srk_table), 0);
+ key_hash = 1;
+ }
+#endif
+#if defined(CONFIG_FSL_ISBC_KEY_EXT)
+ if (!key_hash && check_ie(img))
+ key_hash = 1;
+#endif
+ if (!key_hash)
+ ret = algo->hash_update(algo, ctx,
+ img->img_key, img->hdr.key_len, 0);
+ if (ret)
+ return ret;
+
+ /* Update hash for actual Image */
+ ret = algo->hash_update(algo, ctx,
+ (u8 *)img->hdr.pimg, img->hdr.img_size, 1);
+ if (ret)
+ return ret;
+
+ /* Copy hash at destination buffer */
+ ret = algo->hash_finish(algo, ctx, hash_val, algo->digest_size);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * Construct encoded hash EM' wrt PKCSv1.5. This function calculates the
+ * pointers for padding, DER value and hash. And finally, constructs EM'
+ * which includes hash of complete CSF header and ESBC image. If SG flag
+ * is on, hash of SG table and entries is also included.
+ */
+static void construct_img_encoded_hash_second(struct fsl_secboot_img_priv *img)
+{
+ /*
+ * RSA PKCSv1.5 encoding format for encoded message is below
+ * EM = 0x0 || 0x1 || PS || 0x0 || DER || Hash
+ * PS is Padding String
+ * DER is DER value for SHA-256
+ * Hash is SHA-256 hash
+ * *********************************************************
+ * representative points to first byte of EM initially and is
+ * filled with 0x0
+ * representative is incremented by 1 and second byte is filled
+ * with 0x1
+ * padding points to third byte of EM
+ * digest points to full length of EM - 32 bytes
+ * hash_id (DER value) points to 19 bytes before pDigest
+ * separator is one byte which separates padding and DER
+ */
+
+ size_t len;
+ u8 *representative;
+ u8 *padding, *digest;
+ u8 *hash_id, *separator;
+ int i;
+
+ len = (get_key_len(img) / 2) - 1;
+ representative = img->img_encoded_hash_second;
+ representative[0] = 0;
+ representative[1] = 1; /* block type 1 */
+
+ padding = &representative[2];
+ digest = &representative[1] + len - 32;
+ hash_id = digest - sizeof(hash_identifier);
+ separator = hash_id - 1;
+
+ /* fill padding area pointed by padding with 0xff */
+ memset(padding, 0xff, separator - padding);
+
+ /* fill byte pointed by separator */
+ *separator = 0;
+
+ /* fill SHA-256 DER value pointed by HashId */
+ memcpy(hash_id, hash_identifier, sizeof(hash_identifier));
+
+ /* fill hash pointed by Digest */
+ for (i = 0; i < SHA256_BYTES; i++)
+ digest[i] = hash_val[i];
+}
+
+/*
+ * Reads and validates the ESBC client header.
+ * This function reads key and signature from the ESBC client header.
+ * If Scatter/Gather flag is on, lengths and offsets of images
+ * present as SG entries are also read. This function also checks
+ * whether the header is valid or not.
+ */
+static int read_validate_esbc_client_header(struct fsl_secboot_img_priv *img)
+{
+ char buf[20];
+ struct fsl_secboot_img_hdr *hdr = &img->hdr;
+ void *esbc = (u8 *)img->ehdrloc;
+ u8 *k, *s;
+#ifdef CONFIG_KEY_REVOCATION
+ u32 ret;
+ u32 key_num, key_revoc_flag, size;
+#endif
+#if defined(CONFIG_FSL_ISBC_KEY_EXT)
+ struct ie_key_info *ie_info;
+ u32 ie_num, ie_revoc_flag, ie_key_len;
+#endif
+ int key_found = 0;
+
+ /* check barker code */
+ if (memcmp(hdr->barker, barker_code, ESBC_BARKER_LEN))
+ return ERROR_ESBC_CLIENT_HEADER_BARKER;
+
+ sprintf(buf, "%p", hdr->pimg);
+ setenv("img_addr", buf);
+
+ if (!hdr->img_size)
+ return ERROR_ESBC_CLIENT_HEADER_IMG_SIZE;
+
+ /* Key checking*/
+#ifdef CONFIG_KEY_REVOCATION
+ if (check_srk(img)) {
+ if ((hdr->len_kr.num_srk == 0) ||
+ (hdr->len_kr.num_srk > MAX_KEY_ENTRIES))
+ return ERROR_ESBC_CLIENT_HEADER_INVALID_SRK_NUM_ENTRY;
+
+ key_num = hdr->len_kr.srk_sel;
+ if (key_num == 0 || key_num > hdr->len_kr.num_srk)
+ return ERROR_ESBC_CLIENT_HEADER_INVALID_KEY_NUM;
+
+ /* Get revoc key from sfp */
+ key_revoc_flag = get_key_revoc();
+ ret = is_key_revoked(key_num, key_revoc_flag);
+ if (ret)
+ return ERROR_ESBC_CLIENT_HEADER_KEY_REVOKED;
+
+ size = hdr->len_kr.num_srk * sizeof(struct srk_table);
+
+ memcpy(&img->srk_tbl, esbc + hdr->srk_tbl_off, size);
+
+ ret = validate_srk_tbl(img->srk_tbl, hdr->len_kr.num_srk);
+
+ if (ret != 0)
+ return ret;
+
+ img->key_len = img->srk_tbl[key_num - 1].key_len;
+
+ memcpy(&img->img_key, &(img->srk_tbl[key_num - 1].pkey),
+ img->key_len);
+
+ key_found = 1;
+ }
+#endif
+
+#if defined(CONFIG_FSL_ISBC_KEY_EXT)
+ if (!key_found && check_ie(img)) {
+ if (get_ie_info_addr(&img->ie_addr))
+ return ERROR_IE_TABLE_NOT_FOUND;
+ ie_info = (struct ie_key_info *)img->ie_addr;
+ if (ie_info->num_keys == 0 || ie_info->num_keys > 32)
+ return ERROR_ESBC_CLIENT_HEADER_INVALID_IE_NUM_ENTRY;
+
+ ie_num = hdr->ie_key_sel;
+ if (ie_num == 0 || ie_num > ie_info->num_keys)
+ return ERROR_ESBC_CLIENT_HEADER_INVALID_IE_KEY_NUM;
+
+ ie_revoc_flag = ie_info->key_revok;
+ if ((u32)(1 << (ie_num - 1)) & ie_revoc_flag)
+ return ERROR_ESBC_CLIENT_HEADER_IE_KEY_REVOKED;
+
+ ie_key_len = ie_info->ie_key_tbl[ie_num - 1].key_len;
+
+ if (!((ie_key_len == 2 * KEY_SIZE_BYTES / 4) ||
+ (ie_key_len == 2 * KEY_SIZE_BYTES / 2) ||
+ (ie_key_len == 2 * KEY_SIZE_BYTES)))
+ return ERROR_ESBC_CLIENT_HEADER_INV_IE_ENTRY_KEYLEN;
+
+ memcpy(&img->img_key, &(ie_info->ie_key_tbl[ie_num - 1].pkey),
+ ie_key_len);
+
+ img->key_len = ie_key_len;
+ key_found = 1;
+ }
+#endif
+
+ if (key_found == 0) {
+ /* check key length */
+ if (!((hdr->key_len == 2 * KEY_SIZE_BYTES / 4) ||
+ (hdr->key_len == 2 * KEY_SIZE_BYTES / 2) ||
+ (hdr->key_len == 2 * KEY_SIZE_BYTES)))
+ return ERROR_ESBC_CLIENT_HEADER_KEY_LEN;
+
+ memcpy(&img->img_key, esbc + hdr->pkey, hdr->key_len);
+
+ img->key_len = hdr->key_len;
+
+ key_found = 1;
+ }
+
+ /* check signaure */
+ if (get_key_len(img) == 2 * hdr->sign_len) {
+ /* check signature length */
+ if (!((hdr->sign_len == KEY_SIZE_BYTES / 4) ||
+ (hdr->sign_len == KEY_SIZE_BYTES / 2) ||
+ (hdr->sign_len == KEY_SIZE_BYTES)))
+ return ERROR_ESBC_CLIENT_HEADER_SIG_LEN;
+ } else {
+ return ERROR_ESBC_CLIENT_HEADER_KEY_LEN_NOT_TWICE_SIG_LEN;
+ }
+
+ memcpy(&img->img_sign, esbc + hdr->psign, hdr->sign_len);
+
+ /* No SG support */
+ if (hdr->sg_flag)
+ return ERROR_ESBC_CLIENT_HEADER_SG;
+
+ /* modulus most significant bit should be set */
+ k = (u8 *)&img->img_key;
+
+ if ((k[0] & 0x80) == 0)
+ return ERROR_ESBC_CLIENT_HEADER_KEY_MOD_1;
+
+ /* modulus value should be odd */
+ if ((k[get_key_len(img) / 2 - 1] & 0x1) == 0)
+ return ERROR_ESBC_CLIENT_HEADER_KEY_MOD_2;
+
+ /* Check signature value < modulus value */
+ s = (u8 *)&img->img_sign;
+
+ if (!(memcmp(s, k, hdr->sign_len) < 0))
+ return ERROR_ESBC_CLIENT_HEADER_SIG_KEY_MOD;
+
+ return ESBC_VALID_HDR;
+}
+
+static inline int str2longbe(const char *p, ulong *num)
+{
+ char *endptr;
+ ulong tmp;
+
+ if (!p) {
+ return 0;
+ } else {
+ tmp = simple_strtoul(p, &endptr, 16);
+ if (sizeof(ulong) == 4)
+ *num = cpu_to_be32(tmp);
+ else
+ *num = cpu_to_be64(tmp);
+ }
+
+ return *p != '\0' && *endptr == '\0';
+}
+
+int fsl_secboot_validate(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
+ ulong hash[SHA256_BYTES/sizeof(ulong)];
+ char hash_str[NUM_HEX_CHARS + 1];
+ ulong addr = simple_strtoul(argv[1], NULL, 16);
+ struct fsl_secboot_img_priv *img;
+ struct fsl_secboot_img_hdr *hdr;
+ void *esbc;
+ int ret, i, hash_cmd = 0;
+ u32 srk_hash[8];
+ uint32_t key_len;
+ struct key_prop prop;
+#if !defined(USE_HOSTCC)
+ struct udevice *mod_exp_dev;
+#endif
+
+ if (argc == 3) {
+ char *cp = argv[2];
+ int i = 0;
+
+ if (*cp == '0' && *(cp + 1) == 'x')
+ cp += 2;
+
+ /* The input string expected is in hex, where
+ * each 4 bits would be represented by a hex
+ * sha256 hash is 256 bits long, which would mean
+ * num of characters = 256 / 4
+ */
+ if (strlen(cp) != SHA256_NIBBLES) {
+ printf("%s is not a 256 bits hex string as expected\n",
+ argv[2]);
+ return -1;
+ }
+
+ for (i = 0; i < sizeof(hash)/sizeof(ulong); i++) {
+ strncpy(hash_str, cp + (i * NUM_HEX_CHARS),
+ NUM_HEX_CHARS);
+ hash_str[NUM_HEX_CHARS] = '\0';
+ if (!str2longbe(hash_str, &hash[i])) {
+ printf("%s is not a 256 bits hex string ",
+ argv[2]);
+ return -1;
+ }
+ }
+
+ hash_cmd = 1;
+ }
+
+ img = malloc(sizeof(struct fsl_secboot_img_priv));
+
+ if (!img)
+ return -1;
+
+ memset(img, 0, sizeof(struct fsl_secboot_img_priv));
+
+ hdr = &img->hdr;
+ img->ehdrloc = addr;
+ esbc = (u8 *)img->ehdrloc;
+
+ memcpy(hdr, esbc, sizeof(struct fsl_secboot_img_hdr));
+
+ /* read and validate esbc header */
+ ret = read_validate_esbc_client_header(img);
+
+ if (ret != ESBC_VALID_HDR) {
+ fsl_secboot_handle_error(ret);
+ goto exit;
+ }
+
+ /* SRKH present in SFP */
+ for (i = 0; i < NUM_SRKH_REGS; i++)
+ srk_hash[i] = srk_in32(&sfp_regs->srk_hash[i]);
+
+ /*
+ * Calculate hash of key obtained via offset present in
+ * ESBC uboot client hdr
+ */
+ ret = calc_img_key_hash(img);
+ if (ret) {
+ fsl_secblk_handle_error(ret);
+ goto exit;
+ }
+
+ /* Compare hash obtained above with SRK hash present in SFP */
+ if (hash_cmd)
+ ret = memcmp(&hash, &img->img_key_hash, SHA256_BYTES);
+ else
+ ret = memcmp(srk_hash, img->img_key_hash, SHA256_BYTES);
+
+#if defined(CONFIG_FSL_ISBC_KEY_EXT)
+ if (!hash_cmd && check_ie(img))
+ ret = 0;
+#endif
+
+ if (ret != 0) {
+ fsl_secboot_handle_error(ERROR_ESBC_CLIENT_HASH_COMPARE_KEY);
+ goto exit;
+ }
+
+ ret = calc_esbchdr_esbc_hash(img);
+ if (ret) {
+ fsl_secblk_handle_error(ret);
+ goto exit;
+ }
+
+ /* Construct encoded hash EM' wrt PKCSv1.5 */
+ construct_img_encoded_hash_second(img);
+
+ /* Fill prop structure for public key */
+ memset(&prop, 0, sizeof(struct key_prop));
+ key_len = get_key_len(img) / 2;
+ prop.modulus = img->img_key;
+ prop.public_exponent = img->img_key + key_len;
+ prop.num_bits = key_len * 8;
+ prop.exp_len = key_len;
+
+ ret = uclass_get_device(UCLASS_MOD_EXP, 0, &mod_exp_dev);
+ if (ret) {
+ printf("RSA: Can't find Modular Exp implementation\n");
+ return -EINVAL;
+ }
+
+ ret = rsa_mod_exp(mod_exp_dev, img->img_sign, img->hdr.sign_len,
+ &prop, img->img_encoded_hash);
+ if (ret) {
+ fsl_secblk_handle_error(ret);
+ goto exit;
+ }
+
+ /*
+ * compare the encoded messages EM' and EM wrt RSA PKCSv1.5
+ * memcmp returns zero on success
+ * memcmp returns non-zero on failure
+ */
+ ret = memcmp(&img->img_encoded_hash_second, &img->img_encoded_hash,
+ img->hdr.sign_len);
+
+ if (ret) {
+ fsl_secboot_handle_error(ERROR_ESBC_CLIENT_HASH_COMPARE_EM);
+ goto exit;
+ }
+
+ printf("esbc_validate command successful\n");
+
+exit:
+ return 0;
+}
--- /dev/null
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _FSL_SECBOOT_ERR_H
+#define _FSL_SECBOOT_ERR_H
+
+#define ERROR_ESBC_PAMU_INIT 0x100000
+#define ERROR_ESBC_SEC_RESET 0x200000
+#define ERROR_ESBC_SEC_INIT 0x400000
+#define ERROR_ESBC_SEC_DEQ 0x800000
+#define ERROR_ESBC_SEC_DEQ_TO 0x1000000
+#define ERROR_ESBC_SEC_ENQ 0x2000000
+#define ERROR_ESBC_SEC_JOBQ_STATUS 0x4000000
+#define ERROR_ESBC_CLIENT_CPUID_NO_MATCH 0x1
+#define ERROR_ESBC_CLIENT_HDR_LOC 0x2
+#define ERROR_ESBC_CLIENT_HEADER_BARKER 0x4
+#define ERROR_ESBC_CLIENT_HEADER_KEY_LEN 0x8
+#define ERROR_ESBC_CLIENT_HEADER_SIG_LEN 0x10
+#define ERROR_ESBC_CLIENT_HEADER_KEY_REVOKED 0x11
+#define ERROR_ESBC_CLIENT_HEADER_INVALID_SRK_NUM_ENTRY 0x12
+#define ERROR_ESBC_CLIENT_HEADER_INVALID_KEY_NUM 0x13
+#define ERROR_ESBC_CLIENT_HEADER_INV_SRK_ENTRY_KEYLEN 0x14
+#define ERROR_ESBC_CLIENT_HEADER_IE_KEY_REVOKED 0x15
+#define ERROR_ESBC_CLIENT_HEADER_INVALID_IE_NUM_ENTRY 0x16
+#define ERROR_ESBC_CLIENT_HEADER_INVALID_IE_KEY_NUM 0x17
+#define ERROR_ESBC_CLIENT_HEADER_INV_IE_ENTRY_KEYLEN 0x18
+#define ERROR_IE_TABLE_NOT_FOUND 0x19
+#define ERROR_ESBC_CLIENT_HEADER_KEY_LEN_NOT_TWICE_SIG_LEN 0x20
+#define ERROR_ESBC_CLIENT_HEADER_KEY_MOD_1 0x40
+#define ERROR_ESBC_CLIENT_HEADER_KEY_MOD_2 0x80
+#define ERROR_ESBC_CLIENT_HEADER_SIG_KEY_MOD 0x100
+#define ERROR_ESBC_CLIENT_HEADER_SG_ESBC_EP 0x200
+#define ERROR_ESBC_CLIENT_HASH_COMPARE_KEY 0x400
+#define ERROR_ESBC_CLIENT_HASH_COMPARE_EM 0x800
+#define ERROR_ESBC_CLIENT_SSM_TRUSTSTS 0x1000
+#define ERROR_ESBC_CLIENT_BAD_ADDRESS 0x2000
+#define ERROR_ESBC_CLIENT_MISC 0x4000
+#define ERROR_ESBC_CLIENT_HEADER_SG_ENTIRES_BAD 0x8000
+#define ERROR_ESBC_CLIENT_HEADER_SG 0x10000
+#define ERROR_ESBC_CLIENT_HEADER_IMG_SIZE 0x20000
+#define ERROR_ESBC_WRONG_CMD 0x40000
+#define ERROR_ESBC_MISSING_BOOTM 0x80000
+#define ERROR_ESBC_CLIENT_MAX 0x0
+
+struct fsl_secboot_errcode {
+ int errcode;
+ const char *name;
+};
+
+static const struct fsl_secboot_errcode fsl_secboot_errcodes[] = {
+ { ERROR_ESBC_PAMU_INIT,
+ "Error in initializing PAMU"},
+ { ERROR_ESBC_SEC_RESET,
+ "Error in resetting Job ring of SEC"},
+ { ERROR_ESBC_SEC_INIT,
+ "Error in initializing SEC"},
+ { ERROR_ESBC_SEC_ENQ,
+ "Error in enqueue operation by SEC"},
+ { ERROR_ESBC_SEC_DEQ_TO,
+ "Dequeue operation by SEC is timed out"},
+ { ERROR_ESBC_SEC_DEQ,
+ "Error in dequeue operation by SEC"},
+ { ERROR_ESBC_SEC_JOBQ_STATUS,
+ "Error in status of the job submitted to SEC"},
+ { ERROR_ESBC_CLIENT_CPUID_NO_MATCH,
+ "Current core is not boot core i.e core0" },
+ { ERROR_ESBC_CLIENT_HDR_LOC,
+ "Header address not in allowed memory range" },
+ { ERROR_ESBC_CLIENT_HEADER_BARKER,
+ "Wrong barker code in header" },
+ { ERROR_ESBC_CLIENT_HEADER_KEY_LEN,
+ "Wrong public key length in header" },
+ { ERROR_ESBC_CLIENT_HEADER_SIG_LEN,
+ "Wrong signature length in header" },
+ { ERROR_ESBC_CLIENT_HEADER_KEY_LEN_NOT_TWICE_SIG_LEN,
+ "Public key length not twice of signature length" },
+ { ERROR_ESBC_CLIENT_HEADER_KEY_MOD_1,
+ "Public key Modulus most significant bit not set" },
+ { ERROR_ESBC_CLIENT_HEADER_KEY_MOD_2,
+ "Public key Modulus in header not odd" },
+ { ERROR_ESBC_CLIENT_HEADER_SIG_KEY_MOD,
+ "Signature not less than modulus" },
+ { ERROR_ESBC_CLIENT_HEADER_SG_ESBC_EP,
+ "Entry point not in allowed space or one of the SG entries" },
+ { ERROR_ESBC_CLIENT_HASH_COMPARE_KEY,
+ "Public key hash comparison failed" },
+ { ERROR_ESBC_CLIENT_HASH_COMPARE_EM,
+ "RSA verification failed" },
+ { ERROR_ESBC_CLIENT_SSM_TRUSTSTS,
+ "SNVS not in TRUSTED state" },
+ { ERROR_ESBC_CLIENT_BAD_ADDRESS,
+ "Bad address error" },
+ { ERROR_ESBC_CLIENT_MISC,
+ "Miscallaneous error" },
+ { ERROR_ESBC_CLIENT_HEADER_SG,
+ "No SG support" },
+ { ERROR_ESBC_CLIENT_HEADER_IMG_SIZE,
+ "Invalid Image size" },
+ { ERROR_ESBC_WRONG_CMD,
+ "Unknown cmd/Wrong arguments. Core in infinite loop"},
+ { ERROR_ESBC_MISSING_BOOTM,
+ "Bootm command missing from bootscript" },
+ { ERROR_ESBC_CLIENT_HEADER_KEY_REVOKED,
+ "Selected key is revoked" },
+ { ERROR_ESBC_CLIENT_HEADER_INVALID_SRK_NUM_ENTRY,
+ "Wrong key entry" },
+ { ERROR_ESBC_CLIENT_HEADER_INVALID_KEY_NUM,
+ "Wrong key is selected" },
+ { ERROR_ESBC_CLIENT_HEADER_INV_SRK_ENTRY_KEYLEN,
+ "Wrong srk public key len in header" },
+ { ERROR_ESBC_CLIENT_HEADER_IE_KEY_REVOKED,
+ "Selected IE key is revoked" },
+ { ERROR_ESBC_CLIENT_HEADER_INVALID_IE_NUM_ENTRY,
+ "Wrong key entry in IE Table" },
+ { ERROR_ESBC_CLIENT_HEADER_INVALID_IE_KEY_NUM,
+ "Wrong IE key is selected" },
+ { ERROR_ESBC_CLIENT_HEADER_INV_IE_ENTRY_KEYLEN,
+ "Wrong IE public key len in header" },
+ { ERROR_IE_TABLE_NOT_FOUND,
+ "Information about IE Table missing" },
+ { ERROR_ESBC_CLIENT_MAX, "NULL" }
+};
+
+void fsl_secboot_handle_error(int error);
+#endif
projects / u-boot / commitdiff