#define MAX_RECORD_BYTES (8 * 1024)
+#define MX6DQ_PU_IROM_MMU_EN_VAR 0x009024a8
+#define MX6SDL_PU_IROM_MMU_EN_VAR 0x00901dd0
+#define MX6SL_PU_IROM_MMU_EN_VAR 0x00900a18
+
struct record {
- uint8_t tag; /* Tag */
- uint8_t len[2]; /* Length */
- uint8_t par; /* Version */
- uint8_t contents[MAX_RECORD_BYTES];/* Record Data */
+ uint8_t tag; /* Tag */
+ uint8_t len[2]; /* Length */
+ uint8_t par; /* Version */
+ uint8_t contents[MAX_RECORD_BYTES]; /* Record Data */
bool any_rec_flag;
};
process_event_record(event_data, bytes);
}
+static uint32_t last_hab_event __attribute__((section(".data")));
+
int get_hab_status(void)
{
- static uint32_t last_hab_event __attribute__((section(".data")));
uint32_t index = last_hab_event; /* Loop index */
uint8_t event_data[128]; /* Event data buffer */
size_t bytes = sizeof(event_data); /* Event size in bytes */
- enum hab_config config;
- enum hab_state state;
+ enum hab_config config = 0;
+ enum hab_state state = 0;
+ static int first = 1;
int ret;
- if (is_hab_enabled())
- puts("Secure boot enabled\n");
- else
- puts("Secure boot disabled\n");
+ if (first) {
+ printf("Secure boot %sabled\n",
+ is_hab_enabled() ? "en" : "dis");
+ }
/* Check HAB status */
enable_ocotp_clk(1);
- config = state = 0; /* ROM code assumes short enums! */
ret = hab_rvt_report_status(&config, &state);
enable_ocotp_clk(0);
- printf("HAB Configuration: 0x%02x, HAB State: 0x%02x\n",
- config, state);
+ if (first)
+ printf("HAB Configuration: 0x%02x, HAB State: 0x%02x\n",
+ config, state);
if (ret != HAB_SUCCESS) {
/* Display HAB Error events */
while (hab_rvt_report_event(HAB_STS_ANY, index, event_data,
- &bytes) == HAB_SUCCESS) {
+ &bytes) == HAB_SUCCESS) {
puts("\n");
printf("--------- HAB Event %d -----------------\n",
index + 1);
puts("No HAB Events Found!\n");
ret = 0;
}
+ first = 0;
return ret;
}
+static inline void hab_clear_events(void)
+{
+ uint32_t index = last_hab_event; /* Loop index */
+ uint8_t event_data[128]; /* Event data buffer */
+ size_t bytes = sizeof(event_data); /* Event size in bytes */
+ enum hab_config config = 0;
+ enum hab_state state = 0;
+ int ret;
+
+ /* Check HAB status */
+ enable_ocotp_clk(1);
+ ret = hab_rvt_report_status(&config, &state);
+ enable_ocotp_clk(0);
+ if (ret != HAB_SUCCESS) {
+ while (hab_rvt_report_event(HAB_STS_ANY, index, event_data,
+ &bytes) == HAB_SUCCESS) {
+ index++;
+ }
+ last_hab_event = index;
+ }
+}
+
static inline enum hab_status hab_init(void)
{
enum hab_status ret;
enable_ocotp_clk(1);
- if (!is_hab_enabled()) {
- puts("hab fuse not enabled\n");
- return HAB_FAILURE;
- }
hab_caam_clock_enable(1);
return CMD_RET_SUCCESS;
}
+/* Get CSF Header length */
+static int get_hab_hdr_len(struct hab_hdr *hdr)
+{
+ return (size_t)((hdr->len[0] << 8) + (hdr->len[1]));
+}
+
+/* Check whether addr lies between start and
+ * end and is within the length of the image
+ */
+static int chk_bounds(u8 *addr, size_t bytes, u8 *start, u8 *end)
+{
+ size_t csf_size = (size_t)((end + 1) - addr);
+
+ return addr && (addr >= start) && (addr <= end) &&
+ (csf_size >= bytes);
+}
+
+/* Get Length of each command in CSF */
+static int get_csf_cmd_hdr_len(u8 *csf_hdr)
+{
+ if (*csf_hdr == HAB_CMD_HDR)
+ return sizeof(struct hab_hdr);
+
+ return get_hab_hdr_len((struct hab_hdr *)csf_hdr);
+}
+
+/* Check if CSF is valid */
+static inline bool csf_is_valid(struct ivt *ivt, void *addr, size_t bytes)
+{
+ u8 *start = addr;
+ u8 *csf_hdr;
+ u8 *end;
+
+ size_t csf_hdr_len;
+ size_t cmd_hdr_len;
+ size_t offset = 0;
+
+ if (bytes != 0)
+ end = start + bytes - 1;
+ else
+ end = start;
+
+ /* Verify if CSF pointer content is zero */
+ if (!ivt->csf) {
+ puts("Error: CSF pointer is NULL\n");
+ return false;
+ }
+
+ csf_hdr = (u8 *)(uintptr_t)ivt->csf;
+
+ /* Verify if CSF Header exist */
+ if (*csf_hdr != HAB_CMD_HDR) {
+ puts("Error: CSF header command not found\n");
+ return false;
+ }
+
+ csf_hdr_len = get_hab_hdr_len((struct hab_hdr *)csf_hdr);
+
+ /* Check if the CSF lies within the image bounds */
+ if (!chk_bounds(csf_hdr, csf_hdr_len, start, end)) {
+ puts("Error: CSF lies outside the image bounds\n");
+ return false;
+ }
+
+ do {
+ struct hab_hdr *cmd;
+
+ cmd = (struct hab_hdr *)&csf_hdr[offset];
+
+ switch (cmd->tag) {
+ case (HAB_CMD_WRT_DAT):
+ puts("Error: Deprecated write command found\n");
+ return false;
+ case (HAB_CMD_CHK_DAT):
+ puts("Error: Deprecated check command found\n");
+ return false;
+ case (HAB_CMD_SET):
+ if (cmd->par == HAB_PAR_MID) {
+ puts("Error: Deprecated Set MID command found\n");
+ return false;
+ }
+ default:
+ break;
+ }
+
+ cmd_hdr_len = get_csf_cmd_hdr_len(&csf_hdr[offset]);
+ if (!cmd_hdr_len) {
+ puts("Error: Invalid command length\n");
+ return false;
+ }
+ offset += cmd_hdr_len;
+
+ } while (offset < csf_hdr_len);
+
+ return true;
+}
+
+static int ivt_header_error(const char *err_str, struct ivt_header *ivt_hdr)
+{
+ printf("%s magic=0x%x length=0x%02x version=0x%x\n", err_str,
+ ivt_hdr->magic, ivt_hdr->length, ivt_hdr->version);
+
+ return 1;
+}
+
+static int verify_ivt_header(struct ivt_header *ivt_hdr)
+{
+ if (ivt_hdr->magic != IVT_HEADER_MAGIC)
+ return ivt_header_error("bad IVT magic", ivt_hdr);
+
+ if (be16_to_cpu(ivt_hdr->length) != IVT_TOTAL_LENGTH)
+ return ivt_header_error("bad IVT length", ivt_hdr);
+
+ if (ivt_hdr->version != IVT_HEADER_V1 &&
+ ivt_hdr->version != IVT_HEADER_V2)
+ return ivt_header_error("bad IVT version", ivt_hdr);
+
+ return 0;
+}
+
+/*
+ * Validate IVT structure of the image being authenticated
+ */
+static int validate_ivt(struct ivt *ivt)
+{
+ struct ivt_header *ivt_hdr = &ivt->hdr;
+
+ if ((uintptr_t)ivt & 0x3) {
+ puts("Error: IVT address is not 4 byte aligned\n");
+ return 0;
+ }
+
+ /* Check IVT fields before allowing authentication */
+ if ((!verify_ivt_header(ivt_hdr)) &&
+ (ivt->entry != 0x0) &&
+ (ivt->reserved1 == 0x0) &&
+ (ivt->self == (uint32_t)ivt) &&
+ (ivt->csf != 0x0) &&
+ (ivt->reserved2 == 0x0) &&
+ (ivt->dcd == 0x0)) {
+ return 1;
+ }
+
+ puts("Error: Invalid IVT structure\n");
+ if (ivt->entry == 0x0)
+ printf("entry address must not be NULL\n");
+ if (ivt->reserved1 != 0x0)
+ printf("reserved word at offset 0x%02x should be NULL\n",
+ offsetof(struct ivt, reserved1));
+ if (ivt->dcd != 0x0)
+ puts("Error: DCD pointer must be 0\n");
+ if (ivt->self != (uint32_t)ivt)
+ printf("SELF pointer does not point to IVT\n");
+ if (ivt->csf == 0x0)
+ printf("CSF address must not be NULL\n");
+ if (ivt->reserved2 != 0x0)
+ printf("reserved word at offset 0x%02x should be NULL\n",
+ offsetof(struct ivt, reserved2));
+ puts("\nAllowed IVT structure:\n");
+ printf("IVT HDR = 0x4X2000D1 (0x%08x)\n", *((u32 *)&ivt->hdr));
+ printf("IVT ENTRY = 0xXXXXXXXX (0x%08x)\n", ivt->entry);
+ printf("IVT RSV1 = 0x00000000 (0x%08x)\n", ivt->reserved1);
+ printf("IVT DCD = 0x00000000 (0x%08x)\n", ivt->dcd);
+ printf("IVT BOOT_DATA = 0xXXXXXXXX (0x%08x)\n", ivt->boot);
+ printf("IVT SELF = 0xXXXXXXXX (0x%08x)\n", ivt->self);
+ printf("IVT CSF = 0xXXXXXXXX (0x%08x)\n", ivt->csf);
+ printf("IVT RSV2 = 0x00000000 (0x%08x)\n", ivt->reserved2);
+
+ /* Invalid IVT structure */
+ return 0;
+}
+
+bool imx_hab_authenticate_image(void *addr, size_t len, size_t ivt_offset)
+{
+ struct ivt *ivt;
+ enum hab_status status;
+
+ if (len <= sizeof(ivt)) {
+ printf("Invalid image size %08x\n", len);
+ return false;
+ }
+ if (ivt_offset >= len - sizeof(*ivt)) {
+ printf("IVT offset must be smaller than image size - %u\n",
+ sizeof(*ivt));
+ return false;
+ }
+
+ ivt = addr + ivt_offset;
+ /* Verify IVT header bugging out on error */
+ if (!validate_ivt(ivt)) {
+ print_buffer((ulong)ivt, ivt, 4, 0x8, 0);
+ return false;
+ }
+
+ if (!csf_is_valid(ivt, addr, len)) {
+ print_buffer(ivt->csf, (void *)(ivt->csf), 4, 0x10, 0);
+ return false;
+ }
+
+ status = hab_init();
+ if (status != HAB_SUCCESS)
+ goto hab_auth_error;
+
+ hab_clear_events();
+
+ status = hab_rvt_check_target(HAB_TGT_MEMORY, addr, len);
+ if (status != HAB_SUCCESS) {
+ printf("HAB check target 0x%p-0x%p failed\n",
+ addr, addr + len);
+ goto hab_auth_error;
+ }
+ get_hab_status();
+
+ /*
+ * If the MMU is enabled, we have to notify the ROM
+ * code, or it won't flush the caches when needed.
+ * This is done, by setting the "pu_irom_mmu_enabled"
+ * word to 1. You can find its address by looking in
+ * the ROM map. This is critical for
+ * authenticate_image(). If MMU is enabled, without
+ * setting this bit, authentication will fail and may
+ * crash.
+ */
+ /* Check MMU enabled */
+ if (get_cr() & CR_M) {
+ if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) {
+ /*
+ * This won't work on Rev 1.0.0 of
+ * i.MX6Q/D, since their ROM doesn't
+ * do cache flushes. don't think any
+ * exist, so we ignore them.
+ */
+ if (!is_mx6dqp())
+ writel(1, MX6DQ_PU_IROM_MMU_EN_VAR);
+ } else if (is_cpu_type(MXC_CPU_MX6SOLO) ||
+ is_cpu_type(MXC_CPU_MX6DL)) {
+ writel(1, MX6SDL_PU_IROM_MMU_EN_VAR);
+ } else if (is_cpu_type(MXC_CPU_MX6SL)) {
+ writel(1, MX6SL_PU_IROM_MMU_EN_VAR);
+ }
+ }
+
+ hab_rvt_authenticate_image(HAB_CID_UBOOT, ivt_offset, &addr,
+ &len, NULL);
+ status = hab_exit();
+ if (status != HAB_SUCCESS)
+ goto hab_auth_error;
+
+ if (get_hab_status() != 0) {
+ printf("ERROR: hab_authenticate_image failed\n");
+ return false;
+ }
+ printf("HAB authentication of image at %p..%p successful\n",
+ addr, addr + len);
+ return true;
+
+ hab_auth_error:
+ printf("ERROR: HAB authentication failure: %02x\n", status);
+ get_hab_status();
+ return false;
+}
+
+static int do_authenticate_image(cmd_tbl_t *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ void *addr;
+ size_t ivt_offset, len;
+
+ if (argc < 4)
+ return CMD_RET_USAGE;
+
+ addr = (void *)simple_strtoul(argv[1], NULL, 16);
+ len = simple_strtoul(argv[2], NULL, 16);
+ ivt_offset = simple_strtoul(argv[3], NULL, 16);
+
+ if (imx_hab_authenticate_image(addr, len, ivt_offset))
+ return CMD_RET_SUCCESS;
+
+ get_hab_status();
+
+ return CMD_RET_FAILURE;
+}
+
+U_BOOT_CMD(
+ hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
+ "display HAB status",
+ ""
+ );
+
U_BOOT_CMD(
- hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status,
- "display HAB status",
- ""
- );
+ hab_check_target, 4, 0, do_hab_check_target,
+ "verify an address range via HAB",
+ "addr len [type]\n"
+ "\t\taddr -\taddress to verify\n"
+ "\t\tlen -\tlength of addr range to verify\n"
+ );
U_BOOT_CMD(
- hab_check_target, 4, 0, do_hab_check_target,
- "verify an address range via HAB",
- "addr len [type]\n"
- "\t\taddr -\taddress to verify\n"
- "\t\tlen -\tlength of addr range to verify\n"
- );
+ hab_assert, 4, 0, do_hab_assert,
+ "Test an assertion against the HAB audit log",
+ "addr len [type]\n"
+ "\t\taddr -\taddress to verify\n"
+ "\t\tlen -\tlength of addr range to verify\n"
+ );
U_BOOT_CMD(
- hab_assert, 4, 0, do_hab_assert,
- "Test an assertion against the HAB audit log",
- "addr len [type]\n"
- "\t\taddr -\taddress to verify\n"
- "\t\tlen -\tlength of addr range to verify\n"
- );
+ hab_auth_img, 4, 0, do_authenticate_image,
+ "authenticate image via HAB",
+ "addr len ivt_offset\n"
+ "addr - image hex address\n"
+ "len - image size (hex)\n"
+ "ivt_offset - hex offset of IVT in the image"
+ );
projects / karo-tx-uboot.git / blobdiff