diff options
Diffstat (limited to 'tools/mxsimage.c')
| -rw-r--r-- | tools/mxsimage.c | 2347 |
1 files changed, 2347 insertions, 0 deletions
diff --git a/tools/mxsimage.c b/tools/mxsimage.c new file mode 100644 index 0000000..5db19b2 --- /dev/null +++ b/tools/mxsimage.c @@ -0,0 +1,2347 @@ +/* + * Freescale i.MX23/i.MX28 SB image generator + * + * Copyright (C) 2012-2013 Marek Vasut <marex@denx.de> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifdef CONFIG_MXS + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <limits.h> + +#include <openssl/evp.h> + +#include "mkimage.h" +#include "mxsimage.h" +#include <image.h> + + +/* + * DCD block + * |-Write to address command block + * | 0xf00 == 0xf33d + * | 0xba2 == 0xb33f + * |-ORR address with mask command block + * | 0xf00 |= 0x1337 + * |-Write to address command block + * | 0xba2 == 0xd00d + * : + */ +#define SB_HAB_DCD_WRITE 0xccUL +#define SB_HAB_DCD_CHECK 0xcfUL +#define SB_HAB_DCD_NOOP 0xc0UL +#define SB_HAB_DCD_MASK_BIT (1 << 3) +#define SB_HAB_DCD_SET_BIT (1 << 4) + +/* Addr.n = Value.n */ +#define SB_DCD_WRITE \ + (SB_HAB_DCD_WRITE << 24) +/* Addr.n &= ~Value.n */ +#define SB_DCD_ANDC \ + ((SB_HAB_DCD_WRITE << 24) | SB_HAB_DCD_SET_BIT) +/* Addr.n |= Value.n */ +#define SB_DCD_ORR \ + ((SB_HAB_DCD_WRITE << 24) | SB_HAB_DCD_SET_BIT | SB_HAB_DCD_MASK_BIT) +/* (Addr.n & Value.n) == 0 */ +#define SB_DCD_CHK_EQZ \ + (SB_HAB_DCD_CHECK << 24) +/* (Addr.n & Value.n) == Value.n */ +#define SB_DCD_CHK_EQ \ + ((SB_HAB_DCD_CHECK << 24) | SB_HAB_DCD_SET_BIT) +/* (Addr.n & Value.n) != Value.n */ +#define SB_DCD_CHK_NEQ \ + ((SB_HAB_DCD_CHECK << 24) | SB_HAB_DCD_MASK_BIT) +/* (Addr.n & Value.n) != 0 */ +#define SB_DCD_CHK_NEZ \ + ((SB_HAB_DCD_CHECK << 24) | SB_HAB_DCD_SET_BIT | SB_HAB_DCD_MASK_BIT) +/* NOP */ +#define SB_DCD_NOOP \ + (SB_HAB_DCD_NOOP << 24) + +struct sb_dcd_ctx { + struct sb_dcd_ctx *dcd; + + uint32_t id; + + /* The DCD block. */ + uint32_t *payload; + /* Size of the whole DCD block. */ + uint32_t size; + + /* Pointer to previous DCD command block. */ + uint32_t *prev_dcd_head; +}; + +/* + * IMAGE + * |-SECTION + * | |-CMD + * | |-CMD + * | `-CMD + * |-SECTION + * | |-CMD + * : : + */ +struct sb_cmd_list { + char *cmd; + size_t len; + unsigned int lineno; +}; + +struct sb_cmd_ctx { + uint32_t size; + + struct sb_cmd_ctx *cmd; + + uint8_t *data; + uint32_t length; + + struct sb_command payload; + struct sb_command c_payload; +}; + +struct sb_section_ctx { + uint32_t size; + + /* Section flags */ + unsigned int boot:1; + + struct sb_section_ctx *sect; + + struct sb_cmd_ctx *cmd_head; + struct sb_cmd_ctx *cmd_tail; + + struct sb_sections_header payload; +}; + +struct sb_image_ctx { + unsigned int in_section:1; + unsigned int in_dcd:1; + /* Image configuration */ + unsigned int verbose_boot:1; + unsigned int silent_dump:1; + char *input_filename; + char *output_filename; + char *cfg_filename; + uint8_t image_key[16]; + + /* Number of section in the image */ + unsigned int sect_count; + /* Bootable section */ + unsigned int sect_boot; + unsigned int sect_boot_found:1; + + struct sb_section_ctx *sect_head; + struct sb_section_ctx *sect_tail; + + struct sb_dcd_ctx *dcd_head; + struct sb_dcd_ctx *dcd_tail; + + EVP_CIPHER_CTX cipher_ctx; + EVP_MD_CTX md_ctx; + uint8_t digest[32]; + struct sb_key_dictionary_key sb_dict_key; + + struct sb_boot_image_header payload; +}; + +/* + * Instruction semantics: + * NOOP + * TAG [LAST] + * LOAD address file + * LOAD IVT address IVT_entry_point + * FILL address pattern length + * JUMP [HAB] address [r0_arg] + * CALL [HAB] address [r0_arg] + * MODE mode + * For i.MX23, mode = USB/I2C/SPI1_FLASH/SPI2_FLASH/NAND_BCH + * JTAG/SPI3_EEPROM/SD_SSP0/SD_SSP1 + * For i.MX28, mode = USB/I2C/SPI2_FLASH/SPI3_FLASH/NAND_BCH + * JTAG/SPI2_EEPROM/SD_SSP0/SD_SSP1 + */ + +/* + * AES libcrypto + */ +static int sb_aes_init(struct sb_image_ctx *ictx, uint8_t *iv, int enc) +{ + EVP_CIPHER_CTX *ctx = &ictx->cipher_ctx; + int ret; + + /* If there is no init vector, init vector is all zeroes. */ + if (!iv) + iv = ictx->image_key; + + EVP_CIPHER_CTX_init(ctx); + ret = EVP_CipherInit(ctx, EVP_aes_128_cbc(), ictx->image_key, iv, enc); + if (ret == 1) + EVP_CIPHER_CTX_set_padding(ctx, 0); + return ret; +} + +static int sb_aes_crypt(struct sb_image_ctx *ictx, uint8_t *in_data, + uint8_t *out_data, int in_len) +{ + EVP_CIPHER_CTX *ctx = &ictx->cipher_ctx; + int ret, outlen; + uint8_t *outbuf; + + outbuf = malloc(in_len); + if (!outbuf) + return -ENOMEM; + memset(outbuf, 0, sizeof(in_len)); + + ret = EVP_CipherUpdate(ctx, outbuf, &outlen, in_data, in_len); + if (!ret) { + ret = -EINVAL; + goto err; + } + + if (out_data) + memcpy(out_data, outbuf, outlen); + +err: + free(outbuf); + return ret; +} + +static int sb_aes_deinit(EVP_CIPHER_CTX *ctx) +{ + return EVP_CIPHER_CTX_cleanup(ctx); +} + +static int sb_aes_reinit(struct sb_image_ctx *ictx, int enc) +{ + int ret; + EVP_CIPHER_CTX *ctx = &ictx->cipher_ctx; + struct sb_boot_image_header *sb_header = &ictx->payload; + uint8_t *iv = sb_header->iv; + + ret = sb_aes_deinit(ctx); + if (!ret) + return ret; + return sb_aes_init(ictx, iv, enc); +} + +/* + * CRC32 + */ +static uint32_t crc32(uint8_t *data, uint32_t len) +{ + const uint32_t poly = 0x04c11db7; + uint32_t crc32 = 0xffffffff; + unsigned int byte, bit; + + for (byte = 0; byte < len; byte++) { + crc32 ^= data[byte] << 24; + + for (bit = 8; bit > 0; bit--) { + if (crc32 & (1UL << 31)) + crc32 = (crc32 << 1) ^ poly; + else + crc32 = (crc32 << 1); + } + } + + return crc32; +} + +/* + * Debug + */ +static void soprintf(struct sb_image_ctx *ictx, const char *fmt, ...) +{ + va_list ap; + + if (ictx->silent_dump) + return; + + va_start(ap, fmt); + vfprintf(stdout, fmt, ap); + va_end(ap); +} + +/* + * Code + */ +static time_t sb_get_timestamp(void) +{ + struct tm time_2000 = { + .tm_yday = 1, /* Jan. 1st */ + .tm_year = 100, /* 2000 */ + }; + time_t seconds_to_2000 = mktime(&time_2000); + time_t seconds_to_now = time(NULL); + + return seconds_to_now - seconds_to_2000; +} + +static int sb_get_time(time_t time, struct tm *tm) +{ + struct tm time_2000 = { + .tm_yday = 1, /* Jan. 1st */ + .tm_year = 0, /* 1900 */ + }; + const time_t seconds_to_2000 = mktime(&time_2000); + const time_t seconds_to_now = seconds_to_2000 + time; + struct tm *ret; + ret = gmtime_r(&seconds_to_now, tm); + return ret ? 0 : -EINVAL; +} + +static void sb_encrypt_sb_header(struct sb_image_ctx *ictx) +{ + EVP_MD_CTX *md_ctx = &ictx->md_ctx; + struct sb_boot_image_header *sb_header = &ictx->payload; + uint8_t *sb_header_ptr = (uint8_t *)sb_header; + + /* Encrypt the header, compute the digest. */ + sb_aes_crypt(ictx, sb_header_ptr, NULL, sizeof(*sb_header)); + EVP_DigestUpdate(md_ctx, sb_header_ptr, sizeof(*sb_header)); +} + +static void sb_encrypt_sb_sections_header(struct sb_image_ctx *ictx) +{ + EVP_MD_CTX *md_ctx = &ictx->md_ctx; + struct sb_section_ctx *sctx = ictx->sect_head; + struct sb_sections_header *shdr; + uint8_t *sb_sections_header_ptr; + const int size = sizeof(*shdr); + + while (sctx) { + shdr = &sctx->payload; + sb_sections_header_ptr = (uint8_t *)shdr; + + sb_aes_crypt(ictx, sb_sections_header_ptr, + ictx->sb_dict_key.cbc_mac, size); + EVP_DigestUpdate(md_ctx, sb_sections_header_ptr, size); + + sctx = sctx->sect; + }; +} + +static void sb_encrypt_key_dictionary_key(struct sb_image_ctx *ictx) +{ + EVP_MD_CTX *md_ctx = &ictx->md_ctx; + + sb_aes_crypt(ictx, ictx->image_key, ictx->sb_dict_key.key, + sizeof(ictx->sb_dict_key.key)); + EVP_DigestUpdate(md_ctx, &ictx->sb_dict_key, sizeof(ictx->sb_dict_key)); +} + +static void sb_decrypt_key_dictionary_key(struct sb_image_ctx *ictx) +{ + EVP_MD_CTX *md_ctx = &ictx->md_ctx; + + EVP_DigestUpdate(md_ctx, &ictx->sb_dict_key, sizeof(ictx->sb_dict_key)); + sb_aes_crypt(ictx, ictx->sb_dict_key.key, ictx->image_key, + sizeof(ictx->sb_dict_key.key)); +} + +static void sb_encrypt_tag(struct sb_image_ctx *ictx, + struct sb_cmd_ctx *cctx) +{ + EVP_MD_CTX *md_ctx = &ictx->md_ctx; + struct sb_command *cmd = &cctx->payload; + + sb_aes_crypt(ictx, (uint8_t *)cmd, + (uint8_t *)&cctx->c_payload, sizeof(*cmd)); + EVP_DigestUpdate(md_ctx, &cctx->c_payload, sizeof(*cmd)); +} + +static int sb_encrypt_image(struct sb_image_ctx *ictx) +{ + /* Start image-wide crypto. */ + EVP_MD_CTX_init(&ictx->md_ctx); + EVP_DigestInit(&ictx->md_ctx, EVP_sha1()); + + /* + * SB image header. + */ + sb_aes_init(ictx, NULL, 1); + sb_encrypt_sb_header(ictx); + + /* + * SB sections header. + */ + sb_encrypt_sb_sections_header(ictx); + + /* + * Key dictionary. + */ + sb_aes_reinit(ictx, 1); + sb_encrypt_key_dictionary_key(ictx); + + /* + * Section tags. + */ + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + struct sb_section_ctx *sctx = ictx->sect_head; + + while (sctx) { + cctx = sctx->cmd_head; + + sb_aes_reinit(ictx, 1); + + while (cctx) { + ccmd = &cctx->payload; + + sb_encrypt_tag(ictx, cctx); + + if (ccmd->header.tag == ROM_TAG_CMD) { + sb_aes_reinit(ictx, 1); + } else if (ccmd->header.tag == ROM_LOAD_CMD) { + sb_aes_crypt(ictx, cctx->data, cctx->data, + cctx->length); + EVP_DigestUpdate(&ictx->md_ctx, cctx->data, + cctx->length); + } + + cctx = cctx->cmd; + } + + sctx = sctx->sect; + }; + + /* + * Dump the SHA1 of the whole image. + */ + sb_aes_reinit(ictx, 1); + + EVP_DigestFinal(&ictx->md_ctx, ictx->digest, NULL); + sb_aes_crypt(ictx, ictx->digest, ictx->digest, sizeof(ictx->digest)); + + /* Stop the encryption session. */ + sb_aes_deinit(&ictx->cipher_ctx); + + return 0; +} + +static int sb_load_file(struct sb_cmd_ctx *cctx, char *filename) +{ + long real_size, roundup_size; + uint8_t *data; + long ret; + unsigned long size; + FILE *fp; + + if (!filename) { + fprintf(stderr, "ERR: Missing filename!\n"); + return -EINVAL; + } + + fp = fopen(filename, "r"); + if (!fp) + goto err_open; + + ret = fseek(fp, 0, SEEK_END); + if (ret < 0) + goto err_file; + + real_size = ftell(fp); + if (real_size < 0) + goto err_file; + + ret = fseek(fp, 0, SEEK_SET); + if (ret < 0) + goto err_file; + + roundup_size = roundup(real_size, SB_BLOCK_SIZE); + data = calloc(1, roundup_size); + if (!data) + goto err_file; + + size = fread(data, 1, real_size, fp); + if (size != (unsigned long)real_size) + goto err_alloc; + + cctx->data = data; + cctx->length = roundup_size; + + fclose(fp); + return 0; + +err_alloc: + free(data); +err_file: + fclose(fp); +err_open: + fprintf(stderr, "ERR: Failed to load file \"%s\"\n", filename); + return -EINVAL; +} + +static uint8_t sb_command_checksum(struct sb_command *inst) +{ + uint8_t *inst_ptr = (uint8_t *)inst; + uint8_t csum = 0; + unsigned int i; + + for (i = 0; i < sizeof(struct sb_command); i++) + csum += inst_ptr[i]; + + return csum; +} + +static int sb_token_to_long(char *tok, uint32_t *rid) +{ + char *endptr; + unsigned long id; + + if (tok[0] != '0' || tok[1] != 'x') { + fprintf(stderr, "ERR: Invalid hexadecimal number!\n"); + return -EINVAL; + } + + tok += 2; + + id = strtoul(tok, &endptr, 16); + if ((errno == ERANGE && id == ULONG_MAX) || (errno != 0 && id == 0)) { + fprintf(stderr, "ERR: Value can't be decoded!\n"); + return -EINVAL; + } + + /* Check for 32-bit overflow. */ + if (id > 0xffffffff) { + fprintf(stderr, "ERR: Value too big!\n"); + return -EINVAL; + } + + if (endptr == tok) { + fprintf(stderr, "ERR: Deformed value!\n"); + return -EINVAL; + } + + *rid = (uint32_t)id; + return 0; +} + +static int sb_grow_dcd(struct sb_dcd_ctx *dctx, unsigned int inc_size) +{ + uint32_t *tmp; + + if (!inc_size) + return 0; + + dctx->size += inc_size; + tmp = realloc(dctx->payload, dctx->size); + if (!tmp) + return -ENOMEM; + + dctx->payload = tmp; + + /* Assemble and update the HAB DCD header. */ + dctx->payload[0] = htonl((SB_HAB_DCD_TAG << 24) | + (dctx->size << 8) | + SB_HAB_VERSION); + + return 0; +} + +static int sb_build_dcd(struct sb_image_ctx *ictx, struct sb_cmd_list *cmd) +{ + struct sb_dcd_ctx *dctx; + + char *tok; + uint32_t id; + int ret; + + dctx = calloc(1, sizeof(*dctx)); + if (!dctx) + return -ENOMEM; + + ret = sb_grow_dcd(dctx, 4); + if (ret) + goto err_dcd; + + /* Read DCD block number. */ + tok = strtok(cmd->cmd, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: DCD block without number!\n", + cmd->lineno); + ret = -EINVAL; + goto err_dcd; + } + + /* Parse the DCD block number. */ + ret = sb_token_to_long(tok, &id); + if (ret) { + fprintf(stderr, "#%i ERR: Malformed DCD block number!\n", + cmd->lineno); + goto err_dcd; + } + + dctx->id = id; + + /* + * The DCD block is now constructed. Append it to the list. + * WARNING: The DCD size is still not computed and will be + * updated while parsing it's commands. + */ + if (!ictx->dcd_head) { + ictx->dcd_head = dctx; + ictx->dcd_tail = dctx; + } else { + ictx->dcd_tail->dcd = dctx; + ictx->dcd_tail = dctx; + } + + return 0; + +err_dcd: + free(dctx->payload); + free(dctx); + return ret; +} + +static int sb_build_dcd_block(struct sb_image_ctx *ictx, + struct sb_cmd_list *cmd, + uint32_t type) +{ + char *tok; + uint32_t address, value, length; + int ret; + + struct sb_dcd_ctx *dctx = ictx->dcd_tail; + uint32_t *dcd; + + if (dctx->prev_dcd_head && (type != SB_DCD_NOOP) && + ((dctx->prev_dcd_head[0] & 0xff0000ff) == type)) { + /* Same instruction as before, just append it. */ + ret = sb_grow_dcd(dctx, 8); + if (ret) + return ret; + } else if (type == SB_DCD_NOOP) { + ret = sb_grow_dcd(dctx, 4); + if (ret) + return ret; + + /* Update DCD command block pointer. */ + dctx->prev_dcd_head = dctx->payload + + dctx->size / sizeof(*dctx->payload) - 1; + + /* NOOP has only 4 bytes and no payload. */ + goto noop; + } else { + /* + * Either a different instruction block started now + * or this is the first instruction block. + */ + ret = sb_grow_dcd(dctx, 12); + if (ret) + return ret; + + /* Update DCD command block pointer. */ + dctx->prev_dcd_head = dctx->payload + + dctx->size / sizeof(*dctx->payload) - 3; + } + + dcd = dctx->payload + dctx->size / sizeof(*dctx->payload) - 2; + + /* + * Prepare the command. + */ + tok = strtok(cmd->cmd, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing DCD address!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + /* Read DCD destination address. */ + ret = sb_token_to_long(tok, &address); + if (ret) { + fprintf(stderr, "#%i ERR: Incorrect DCD address!\n", + cmd->lineno); + goto err; + } + + tok = strtok(NULL, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing DCD value!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + /* Read DCD operation value. */ + ret = sb_token_to_long(tok, &value); + if (ret) { + fprintf(stderr, "#%i ERR: Incorrect DCD value!\n", + cmd->lineno); + goto err; + } + + /* Fill in the new DCD entry. */ + dcd[0] = htonl(address); + dcd[1] = htonl(value); + +noop: + /* Update the DCD command block. */ + length = dctx->size - + ((dctx->prev_dcd_head - dctx->payload) * + sizeof(*dctx->payload)); + dctx->prev_dcd_head[0] = htonl(type | (length << 8)); + +err: + return ret; +} + +static int sb_build_section(struct sb_image_ctx *ictx, struct sb_cmd_list *cmd) +{ + struct sb_section_ctx *sctx; + struct sb_sections_header *shdr; + char *tok; + uint32_t bootable = 0; + uint32_t id; + int ret; + + sctx = calloc(1, sizeof(*sctx)); + if (!sctx) + return -ENOMEM; + + /* Read section number. */ + tok = strtok(cmd->cmd, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Section without number!\n", + cmd->lineno); + ret = -EINVAL; + goto err_sect; + } + + /* Parse the section number. */ + ret = sb_token_to_long(tok, &id); + if (ret) { + fprintf(stderr, "#%i ERR: Malformed section number!\n", + cmd->lineno); + goto err_sect; + } + + /* Read section's BOOTABLE flag. */ + tok = strtok(NULL, " "); + if (tok && (strlen(tok) == 8) && !strncmp(tok, "BOOTABLE", 8)) + bootable = SB_SECTION_FLAG_BOOTABLE; + + sctx->boot = bootable; + + shdr = &sctx->payload; + shdr->section_number = id; + shdr->section_flags = bootable; + + /* + * The section is now constructed. Append it to the list. + * WARNING: The section size is still not computed and will + * be updated while parsing it's commands. + */ + ictx->sect_count++; + + /* Mark that this section is bootable one. */ + if (bootable) { + if (ictx->sect_boot_found) { + fprintf(stderr, + "#%i WARN: Multiple bootable section!\n", + cmd->lineno); + } else { + ictx->sect_boot = id; + ictx->sect_boot_found = 1; + } + } + + if (!ictx->sect_head) { + ictx->sect_head = sctx; + ictx->sect_tail = sctx; + } else { + ictx->sect_tail->sect = sctx; + ictx->sect_tail = sctx; + } + + return 0; + +err_sect: + free(sctx); + return ret; +} + +static int sb_build_command_nop(struct sb_image_ctx *ictx) +{ + struct sb_section_ctx *sctx = ictx->sect_tail; + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + + cctx = calloc(1, sizeof(*cctx)); + if (!cctx) + return -ENOMEM; + + ccmd = &cctx->payload; + + /* + * Construct the command. + */ + ccmd->header.checksum = 0x5a; + ccmd->header.tag = ROM_NOP_CMD; + + cctx->size = sizeof(*ccmd); + + /* + * Append the command to the last section. + */ + if (!sctx->cmd_head) { + sctx->cmd_head = cctx; + sctx->cmd_tail = cctx; + } else { + sctx->cmd_tail->cmd = cctx; + sctx->cmd_tail = cctx; + } + + return 0; +} + +static int sb_build_command_tag(struct sb_image_ctx *ictx, + struct sb_cmd_list *cmd) +{ + struct sb_section_ctx *sctx = ictx->sect_tail; + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + char *tok; + + cctx = calloc(1, sizeof(*cctx)); + if (!cctx) + return -ENOMEM; + + ccmd = &cctx->payload; + + /* + * Prepare the command. + */ + /* Check for the LAST keyword. */ + tok = strtok(cmd->cmd, " "); + if (tok && !strcmp(tok, "LAST")) + ccmd->header.flags = ROM_TAG_CMD_FLAG_ROM_LAST_TAG; + + /* + * Construct the command. + */ + ccmd->header.checksum = 0x5a; + ccmd->header.tag = ROM_TAG_CMD; + + cctx->size = sizeof(*ccmd); + + /* + * Append the command to the last section. + */ + if (!sctx->cmd_head) { + sctx->cmd_head = cctx; + sctx->cmd_tail = cctx; + } else { + sctx->cmd_tail->cmd = cctx; + sctx->cmd_tail = cctx; + } + + return 0; +} + +static int sb_build_command_load(struct sb_image_ctx *ictx, + struct sb_cmd_list *cmd) +{ + struct sb_section_ctx *sctx = ictx->sect_tail; + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + char *tok; + int ret, is_ivt = 0, is_dcd = 0; + uint32_t dest, dcd = 0; + + cctx = calloc(1, sizeof(*cctx)); + if (!cctx) + return -ENOMEM; + + ccmd = &cctx->payload; + + /* + * Prepare the command. + */ + tok = strtok(cmd->cmd, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing LOAD address or 'IVT'!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + /* Check for "IVT" flag. */ + if (!strcmp(tok, "IVT")) + is_ivt = 1; + if (!strcmp(tok, "DCD")) + is_dcd = 1; + if (is_ivt || is_dcd) { + tok = strtok(NULL, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing LOAD address!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + } + + /* Read load destination address. */ + ret = sb_token_to_long(tok, &dest); + if (ret) { + fprintf(stderr, "#%i ERR: Incorrect LOAD address!\n", + cmd->lineno); + goto err; + } + + /* Read filename or IVT entrypoint or DCD block ID. */ + tok = strtok(NULL, " "); + if (!tok) { + fprintf(stderr, + "#%i ERR: Missing LOAD filename or IVT ep or DCD block ID!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + if (is_ivt) { + /* Handle IVT. */ + struct sb_ivt_header *ivt; + uint32_t ivtep; + ret = sb_token_to_long(tok, &ivtep); + + if (ret) { + fprintf(stderr, + "#%i ERR: Incorrect IVT entry point!\n", + cmd->lineno); + goto err; + } + + ivt = calloc(1, sizeof(*ivt)); + if (!ivt) { + ret = -ENOMEM; + goto err; + } + + ivt->header = sb_hab_ivt_header(); + ivt->entry = ivtep; + ivt->self = dest; + + cctx->data = (uint8_t *)ivt; + cctx->length = sizeof(*ivt); + } else if (is_dcd) { + struct sb_dcd_ctx *dctx = ictx->dcd_head; + uint32_t dcdid; + uint8_t *payload; + uint32_t asize; + ret = sb_token_to_long(tok, &dcdid); + + if (ret) { + fprintf(stderr, + "#%i ERR: Incorrect DCD block ID!\n", + cmd->lineno); + goto err; + } + + while (dctx) { + if (dctx->id == dcdid) + break; + dctx = dctx->dcd; + } + + if (!dctx) { + fprintf(stderr, "#%i ERR: DCD block %08x not found!\n", + cmd->lineno, dcdid); + goto err; + } + + asize = roundup(dctx->size, SB_BLOCK_SIZE); + payload = calloc(1, asize); + if (!payload) { + ret = -ENOMEM; + goto err; + } + + memcpy(payload, dctx->payload, dctx->size); + + cctx->data = payload; + cctx->length = asize; + + /* Set the Load DCD flag. */ + dcd = ROM_LOAD_CMD_FLAG_DCD_LOAD; + } else { + /* Regular LOAD of a file. */ + ret = sb_load_file(cctx, tok); + if (ret) { + fprintf(stderr, "#%i ERR: Cannot load '%s'!\n", + cmd->lineno, tok); + goto err; + } + } + + if (cctx->length & (SB_BLOCK_SIZE - 1)) { + fprintf(stderr, "#%i ERR: Unaligned payload!\n", + cmd->lineno); + } + + /* + * Construct the command. + */ + ccmd->header.checksum = 0x5a; + ccmd->header.tag = ROM_LOAD_CMD; + ccmd->header.flags = dcd; + + ccmd->load.address = dest; + ccmd->load.count = cctx->length; + ccmd->load.crc32 = crc32(cctx->data, cctx->length); + + cctx->size = sizeof(*ccmd) + cctx->length; + + /* + * Append the command to the last section. + */ + if (!sctx->cmd_head) { + sctx->cmd_head = cctx; + sctx->cmd_tail = cctx; + } else { + sctx->cmd_tail->cmd = cctx; + sctx->cmd_tail = cctx; + } + + return 0; + +err: + free(cctx); + return ret; +} + +static int sb_build_command_fill(struct sb_image_ctx *ictx, + struct sb_cmd_list *cmd) +{ + struct sb_section_ctx *sctx = ictx->sect_tail; + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + char *tok; + uint32_t address, pattern, length; + int ret; + + cctx = calloc(1, sizeof(*cctx)); + if (!cctx) + return -ENOMEM; + + ccmd = &cctx->payload; + + /* + * Prepare the command. + */ + tok = strtok(cmd->cmd, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing FILL address!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + /* Read fill destination address. */ + ret = sb_token_to_long(tok, &address); + if (ret) { + fprintf(stderr, "#%i ERR: Incorrect FILL address!\n", + cmd->lineno); + goto err; + } + + tok = strtok(NULL, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing FILL pattern!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + /* Read fill pattern address. */ + ret = sb_token_to_long(tok, &pattern); + if (ret) { + fprintf(stderr, "#%i ERR: Incorrect FILL pattern!\n", + cmd->lineno); + goto err; + } + + tok = strtok(NULL, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing FILL length!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + /* Read fill pattern address. */ + ret = sb_token_to_long(tok, &length); + if (ret) { + fprintf(stderr, "#%i ERR: Incorrect FILL length!\n", + cmd->lineno); + goto err; + } + + /* + * Construct the command. + */ + ccmd->header.checksum = 0x5a; + ccmd->header.tag = ROM_FILL_CMD; + + ccmd->fill.address = address; + ccmd->fill.count = length; + ccmd->fill.pattern = pattern; + + cctx->size = sizeof(*ccmd); + + /* + * Append the command to the last section. + */ + if (!sctx->cmd_head) { + sctx->cmd_head = cctx; + sctx->cmd_tail = cctx; + } else { + sctx->cmd_tail->cmd = cctx; + sctx->cmd_tail = cctx; + } + + return 0; + +err: + free(cctx); + return ret; +} + +static int sb_build_command_jump_call(struct sb_image_ctx *ictx, + struct sb_cmd_list *cmd, + unsigned int is_call) +{ + struct sb_section_ctx *sctx = ictx->sect_tail; + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + char *tok; + uint32_t dest, arg = 0x0; + uint32_t hab = 0; + int ret; + const char *cmdname = is_call ? "CALL" : "JUMP"; + + cctx = calloc(1, sizeof(*cctx)); + if (!cctx) + return -ENOMEM; + + ccmd = &cctx->payload; + + /* + * Prepare the command. + */ + tok = strtok(cmd->cmd, " "); + if (!tok) { + fprintf(stderr, + "#%i ERR: Missing %s address or 'HAB'!\n", + cmd->lineno, cmdname); + ret = -EINVAL; + goto err; + } + + /* Check for "HAB" flag. */ + if (!strcmp(tok, "HAB")) { + hab = is_call ? ROM_CALL_CMD_FLAG_HAB : ROM_JUMP_CMD_FLAG_HAB; + tok = strtok(NULL, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing %s address!\n", + cmd->lineno, cmdname); + ret = -EINVAL; + goto err; + } + } + /* Read load destination address. */ + ret = sb_token_to_long(tok, &dest); + if (ret) { + fprintf(stderr, "#%i ERR: Incorrect %s address!\n", + cmd->lineno, cmdname); + goto err; + } + + tok = strtok(NULL, " "); + if (tok) { + ret = sb_token_to_long(tok, &arg); + if (ret) { + fprintf(stderr, + "#%i ERR: Incorrect %s argument!\n", + cmd->lineno, cmdname); + goto err; + } + } + + /* + * Construct the command. + */ + ccmd->header.checksum = 0x5a; + ccmd->header.tag = is_call ? ROM_CALL_CMD : ROM_JUMP_CMD; + ccmd->header.flags = hab; + + ccmd->call.address = dest; + ccmd->call.argument = arg; + + cctx->size = sizeof(*ccmd); + + /* + * Append the command to the last section. + */ + if (!sctx->cmd_head) { + sctx->cmd_head = cctx; + sctx->cmd_tail = cctx; + } else { + sctx->cmd_tail->cmd = cctx; + sctx->cmd_tail = cctx; + } + + return 0; + +err: + free(cctx); + return ret; +} + +static int sb_build_command_jump(struct sb_image_ctx *ictx, + struct sb_cmd_list *cmd) +{ + return sb_build_command_jump_call(ictx, cmd, 0); +} + +static int sb_build_command_call(struct sb_image_ctx *ictx, + struct sb_cmd_list *cmd) +{ + return sb_build_command_jump_call(ictx, cmd, 1); +} + +static int sb_build_command_mode(struct sb_image_ctx *ictx, + struct sb_cmd_list *cmd) +{ + struct sb_section_ctx *sctx = ictx->sect_tail; + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + char *tok; + int ret; + unsigned int i; + uint32_t mode = 0xffffffff; + + cctx = calloc(1, sizeof(*cctx)); + if (!cctx) + return -ENOMEM; + + ccmd = &cctx->payload; + + /* + * Prepare the command. + */ + tok = strtok(cmd->cmd, " "); + if (!tok) { + fprintf(stderr, "#%i ERR: Missing MODE boot mode argument!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + for (i = 0; i < ARRAY_SIZE(modetable); i++) { + if (!strcmp(tok, modetable[i].name)) { + mode = modetable[i].mode; + break; + } + + if (!modetable[i].altname) + continue; + + if (!strcmp(tok, modetable[i].altname)) { + mode = modetable[i].mode; + break; + } + } + + if (mode == 0xffffffff) { + fprintf(stderr, "#%i ERR: Invalid MODE boot mode argument!\n", + cmd->lineno); + ret = -EINVAL; + goto err; + } + + /* + * Construct the command. + */ + ccmd->header.checksum = 0x5a; + ccmd->header.tag = ROM_MODE_CMD; + + ccmd->mode.mode = mode; + + cctx->size = sizeof(*ccmd); + + /* + * Append the command to the last section. + */ + if (!sctx->cmd_head) { + sctx->cmd_head = cctx; + sctx->cmd_tail = cctx; + } else { + sctx->cmd_tail->cmd = cctx; + sctx->cmd_tail = cctx; + } + + return 0; + +err: + free(cctx); + return ret; +} + +static int sb_prefill_image_header(struct sb_image_ctx *ictx) +{ + struct sb_boot_image_header *hdr = &ictx->payload; + + /* Fill signatures */ + memcpy(hdr->signature1, "STMP", 4); + memcpy(hdr->signature2, "sgtl", 4); + + /* SB Image version 1.1 */ + hdr->major_version = SB_VERSION_MAJOR; + hdr->minor_version = SB_VERSION_MINOR; + + /* Boot image major version */ + hdr->product_version.major = htons(0x999); + hdr->product_version.minor = htons(0x999); + hdr->product_version.revision = htons(0x999); + /* Boot image major version */ + hdr->component_version.major = htons(0x999); + hdr->component_version.minor = htons(0x999); + hdr->component_version.revision = htons(0x999); + + /* Drive tag must be 0x0 for i.MX23 */ + hdr->drive_tag = 0; + + hdr->header_blocks = + sizeof(struct sb_boot_image_header) / SB_BLOCK_SIZE; + hdr->section_header_size = + sizeof(struct sb_sections_header) / SB_BLOCK_SIZE; + hdr->timestamp_us = sb_get_timestamp() * 1000000; + + /* FIXME -- add proper config option */ + hdr->flags = ictx->verbose_boot ? SB_IMAGE_FLAG_VERBOSE : 0, + + /* FIXME -- We support only default key */ + hdr->key_count = 1; + + return 0; +} + +static int sb_postfill_image_header(struct sb_image_ctx *ictx) +{ + struct sb_boot_image_header *hdr = &ictx->payload; + struct sb_section_ctx *sctx = ictx->sect_head; + uint32_t kd_size, sections_blocks; + EVP_MD_CTX md_ctx; + + /* The main SB header size in blocks. */ + hdr->image_blocks = hdr->header_blocks; + + /* Size of the key dictionary, which has single zero entry. */ + kd_size = hdr->key_count * sizeof(struct sb_key_dictionary_key); + hdr->image_blocks += kd_size / SB_BLOCK_SIZE; + + /* Now count the payloads. */ + hdr->section_count = ictx->sect_count; + while (sctx) { + hdr->image_blocks += sctx->size / SB_BLOCK_SIZE; + sctx = sctx->sect; + } + + if (!ictx->sect_boot_found) { + fprintf(stderr, "ERR: No bootable section selected!\n"); + return -EINVAL; + } + hdr->first_boot_section_id = ictx->sect_boot; + + /* The n * SB section size in blocks. */ + sections_blocks = hdr->section_count * hdr->section_header_size; + hdr->image_blocks += sections_blocks; + + /* Key dictionary offset. */ + hdr->key_dictionary_block = hdr->header_blocks + sections_blocks; + + /* Digest of the whole image. */ + hdr->image_blocks += 2; + + /* Pointer past the dictionary. */ + hdr->first_boot_tag_block = + hdr->key_dictionary_block + kd_size / SB_BLOCK_SIZE; + + /* Compute header digest. */ + EVP_MD_CTX_init(&md_ctx); + + EVP_DigestInit(&md_ctx, EVP_sha1()); + EVP_DigestUpdate(&md_ctx, hdr->signature1, + sizeof(struct sb_boot_image_header) - + sizeof(hdr->digest)); + EVP_DigestFinal(&md_ctx, hdr->digest, NULL); + + return 0; +} + +static int sb_fixup_sections_and_tags(struct sb_image_ctx *ictx) +{ + /* Fixup the placement of sections. */ + struct sb_boot_image_header *ihdr = &ictx->payload; + struct sb_section_ctx *sctx = ictx->sect_head; + struct sb_sections_header *shdr; + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + uint32_t offset = ihdr->first_boot_tag_block; + + while (sctx) { + shdr = &sctx->payload; + + /* Fill in the section TAG offset. */ + shdr->section_offset = offset + 1; + offset += shdr->section_size; + + /* Section length is measured from the TAG block. */ + shdr->section_size--; + + /* Fixup the TAG command. */ + cctx = sctx->cmd_head; + while (cctx) { + ccmd = &cctx->payload; + if (ccmd->header.tag == ROM_TAG_CMD) { + ccmd->tag.section_number = shdr->section_number; + ccmd->tag.section_length = shdr->section_size; + ccmd->tag.section_flags = shdr->section_flags; + } + + /* Update the command checksum. */ + ccmd->header.checksum = sb_command_checksum(ccmd); + + cctx = cctx->cmd; + } + + sctx = sctx->sect; + } + + return 0; +} + +static int sb_parse_line(struct sb_image_ctx *ictx, struct sb_cmd_list *cmd) +{ + char *tok; + char *line = cmd->cmd; + char *rptr; + int ret; + + /* Analyze the identifier on this line first. */ + tok = strtok_r(line, " ", &rptr); + if (!tok || (strlen(tok) == 0)) { + fprintf(stderr, "#%i ERR: Invalid line!\n", cmd->lineno); + return -EINVAL; + } + + cmd->cmd = rptr; + + /* DCD */ + if (!strcmp(tok, "DCD")) { + ictx->in_section = 0; + ictx->in_dcd = 1; + sb_build_dcd(ictx, cmd); + return 0; + } + + /* Section */ + if (!strcmp(tok, "SECTION")) { + ictx->in_section = 1; + ictx->in_dcd = 0; + sb_build_section(ictx, cmd); + return 0; + } + + if (!ictx->in_section && !ictx->in_dcd) { + fprintf(stderr, "#%i ERR: Data outside of a section!\n", + cmd->lineno); + return -EINVAL; + } + + if (ictx->in_section) { + /* Section commands */ + if (!strcmp(tok, "NOP")) { + ret = sb_build_command_nop(ictx); + } else if (!strcmp(tok, "TAG")) { + ret = sb_build_command_tag(ictx, cmd); + } else if (!strcmp(tok, "LOAD")) { + ret = sb_build_command_load(ictx, cmd); + } else if (!strcmp(tok, "FILL")) { + ret = sb_build_command_fill(ictx, cmd); + } else if (!strcmp(tok, "JUMP")) { + ret = sb_build_command_jump(ictx, cmd); + } else if (!strcmp(tok, "CALL")) { + ret = sb_build_command_call(ictx, cmd); + } else if (!strcmp(tok, "MODE")) { + ret = sb_build_command_mode(ictx, cmd); + } else { + fprintf(stderr, + "#%i ERR: Unsupported instruction '%s'!\n", + cmd->lineno, tok); + return -ENOTSUP; + } + } else if (ictx->in_dcd) { + char *lptr; + uint32_t ilen = '1'; + + tok = strtok_r(tok, ".", &lptr); + if (!tok || (strlen(tok) == 0) || (lptr && strlen(lptr) != 1)) { + fprintf(stderr, "#%i ERR: Invalid line!\n", + cmd->lineno); + return -EINVAL; + } + + if (lptr && + (lptr[0] != '1' && lptr[0] != '2' && lptr[0] != '4')) { + fprintf(stderr, "#%i ERR: Invalid instruction width!\n", + cmd->lineno); + return -EINVAL; + } + + if (lptr) + ilen = lptr[0] - '1'; + + /* DCD commands */ + if (!strcmp(tok, "WRITE")) { + ret = sb_build_dcd_block(ictx, cmd, + SB_DCD_WRITE | ilen); + } else if (!strcmp(tok, "ANDC")) { + ret = sb_build_dcd_block(ictx, cmd, + SB_DCD_ANDC | ilen); + } else if (!strcmp(tok, "ORR")) { + ret = sb_build_dcd_block(ictx, cmd, + SB_DCD_ORR | ilen); + } else if (!strcmp(tok, "EQZ")) { + ret = sb_build_dcd_block(ictx, cmd, + SB_DCD_CHK_EQZ | ilen); + } else if (!strcmp(tok, "EQ")) { + ret = sb_build_dcd_block(ictx, cmd, + SB_DCD_CHK_EQ | ilen); + } else if (!strcmp(tok, "NEQ")) { + ret = sb_build_dcd_block(ictx, cmd, + SB_DCD_CHK_NEQ | ilen); + } else if (!strcmp(tok, "NEZ")) { + ret = sb_build_dcd_block(ictx, cmd, + SB_DCD_CHK_NEZ | ilen); + } else if (!strcmp(tok, "NOOP")) { + ret = sb_build_dcd_block(ictx, cmd, SB_DCD_NOOP); + } else { + fprintf(stderr, + "#%i ERR: Unsupported instruction '%s'!\n", + cmd->lineno, tok); + return -ENOTSUP; + } + } else { + fprintf(stderr, "#%i ERR: Unsupported instruction '%s'!\n", + cmd->lineno, tok); + return -ENOTSUP; + } + + /* + * Here we have at least one section with one command, otherwise we + * would have failed already higher above. + * + * FIXME -- should the updating happen here ? + */ + if (ictx->in_section && !ret) { + ictx->sect_tail->size += ictx->sect_tail->cmd_tail->size; + ictx->sect_tail->payload.section_size = + ictx->sect_tail->size / SB_BLOCK_SIZE; + } + + return ret; +} + +static int sb_load_cmdfile(struct sb_image_ctx *ictx) +{ + struct sb_cmd_list cmd; + int lineno = 1; + FILE *fp; + char *line = NULL; + ssize_t rlen; + size_t len; + + fp = fopen(ictx->cfg_filename, "r"); + if (!fp) + goto err_file; + + while ((rlen = getline(&line, &len, fp)) > 0) { + memset(&cmd, 0, sizeof(cmd)); + + /* Strip the trailing newline. */ + line[rlen - 1] = '\0'; + + cmd.cmd = line; + cmd.len = rlen; + cmd.lineno = lineno++; + + sb_parse_line(ictx, &cmd); + } + + free(line); + + fclose(fp); + + return 0; + +err_file: + fclose(fp); + fprintf(stderr, "ERR: Failed to load file \"%s\"\n", + ictx->cfg_filename); + return -EINVAL; +} + +static int sb_build_tree_from_cfg(struct sb_image_ctx *ictx) +{ + int ret; + + ret = sb_load_cmdfile(ictx); + if (ret) + return ret; + + ret = sb_prefill_image_header(ictx); + if (ret) + return ret; + + ret = sb_postfill_image_header(ictx); + if (ret) + return ret; + + ret = sb_fixup_sections_and_tags(ictx); + if (ret) + return ret; + + return 0; +} + +static int sb_verify_image_header(struct sb_image_ctx *ictx, + FILE *fp, long fsize) +{ + /* Verify static fields in the image header. */ + struct sb_boot_image_header *hdr = &ictx->payload; + const char *stat[2] = { "[PASS]", "[FAIL]" }; + struct tm tm; + int sz, ret = 0; + unsigned char digest[20]; + EVP_MD_CTX md_ctx; + unsigned long size; + + /* Start image-wide crypto. */ + EVP_MD_CTX_init(&ictx->md_ctx); + EVP_DigestInit(&ictx->md_ctx, EVP_sha1()); + + soprintf(ictx, "---------- Verifying SB Image Header ----------\n"); + + size = fread(&ictx->payload, 1, sizeof(ictx->payload), fp); + if (size != sizeof(ictx->payload)) { + fprintf(stderr, "ERR: SB image header too short!\n"); + return -EINVAL; + } + + /* Compute header digest. */ + EVP_MD_CTX_init(&md_ctx); + EVP_DigestInit(&md_ctx, EVP_sha1()); + EVP_DigestUpdate(&md_ctx, hdr->signature1, + sizeof(struct sb_boot_image_header) - + sizeof(hdr->digest)); + EVP_DigestFinal(&md_ctx, digest, NULL); + + sb_aes_init(ictx, NULL, 1); + sb_encrypt_sb_header(ictx); + + if (memcmp(digest, hdr->digest, 20)) + ret = -EINVAL; + soprintf(ictx, "%s Image header checksum: %s\n", stat[!!ret], + ret ? "BAD" : "OK"); + if (ret) + return ret; + + if (memcmp(hdr->signature1, "STMP", 4) || + memcmp(hdr->signature2, "sgtl", 4)) + ret = -EINVAL; + soprintf(ictx, "%s Signatures: '%.4s' '%.4s'\n", + stat[!!ret], hdr->signature1, hdr->signature2); + if (ret) + return ret; + + if ((hdr->major_version != SB_VERSION_MAJOR) || + ((hdr->minor_version != 1) && (hdr->minor_version != 2))) + ret = -EINVAL; + soprintf(ictx, "%s Image version: v%i.%i\n", stat[!!ret], + hdr->major_version, hdr->minor_version); + if (ret) + return ret; + + ret = sb_get_time(hdr->timestamp_us / 1000000, &tm); + soprintf(ictx, + "%s Creation time: %02i:%02i:%02i %02i/%02i/%04i\n", + stat[!!ret], tm.tm_hour, tm.tm_min, tm.tm_sec, + tm.tm_mday, tm.tm_mon, tm.tm_year + 2000); + if (ret) + return ret; + + soprintf(ictx, "%s Product version: %x.%x.%x\n", stat[0], + ntohs(hdr->product_version.major), + ntohs(hdr->product_version.minor), + ntohs(hdr->product_version.revision)); + soprintf(ictx, "%s Component version: %x.%x.%x\n", stat[0], + ntohs(hdr->component_version.major), + ntohs(hdr->component_version.minor), + ntohs(hdr->component_version.revision)); + + if (hdr->flags & ~SB_IMAGE_FLAG_VERBOSE) + ret = -EINVAL; + soprintf(ictx, "%s Image flags: %s\n", stat[!!ret], + hdr->flags & SB_IMAGE_FLAG_VERBOSE ? "Verbose_boot" : ""); + if (ret) + return ret; + + if (hdr->drive_tag != 0) + ret = -EINVAL; + soprintf(ictx, "%s Drive tag: %i\n", stat[!!ret], + hdr->drive_tag); + if (ret) + return ret; + + sz = sizeof(struct sb_boot_image_header) / SB_BLOCK_SIZE; + if (hdr->header_blocks != sz) + ret = -EINVAL; + soprintf(ictx, "%s Image header size (blocks): %i\n", stat[!!ret], + hdr->header_blocks); + if (ret) + return ret; + + sz = sizeof(struct sb_sections_header) / SB_BLOCK_SIZE; + if (hdr->section_header_size != sz) + ret = -EINVAL; + soprintf(ictx, "%s Section header size (blocks): %i\n", stat[!!ret], + hdr->section_header_size); + if (ret) + return ret; + + soprintf(ictx, "%s Sections count: %i\n", stat[!!ret], + hdr->section_count); + soprintf(ictx, "%s First bootable section %i\n", stat[!!ret], + hdr->first_boot_section_id); + + if (hdr->image_blocks != fsize / SB_BLOCK_SIZE) + ret = -EINVAL; + soprintf(ictx, "%s Image size (blocks): %i\n", stat[!!ret], + hdr->image_blocks); + if (ret) + return ret; + + sz = hdr->header_blocks + hdr->section_header_size * hdr->section_count; + if (hdr->key_dictionary_block != sz) + ret = -EINVAL; + soprintf(ictx, "%s Key dict offset (blocks): %i\n", stat[!!ret], + hdr->key_dictionary_block); + if (ret) + return ret; + + if (hdr->key_count != 1) + ret = -EINVAL; + soprintf(ictx, "%s Number of encryption keys: %i\n", stat[!!ret], + hdr->key_count); + if (ret) + return ret; + + sz = hdr->header_blocks + hdr->section_header_size * hdr->section_count; + sz += hdr->key_count * + sizeof(struct sb_key_dictionary_key) / SB_BLOCK_SIZE; + if (hdr->first_boot_tag_block != (unsigned)sz) + ret = -EINVAL; + soprintf(ictx, "%s First TAG block (blocks): %i\n", stat[!!ret], + hdr->first_boot_tag_block); + if (ret) + return ret; + + return 0; +} + +static void sb_decrypt_tag(struct sb_image_ctx *ictx, + struct sb_cmd_ctx *cctx) +{ + EVP_MD_CTX *md_ctx = &ictx->md_ctx; + struct sb_command *cmd = &cctx->payload; + + sb_aes_crypt(ictx, (uint8_t *)&cctx->c_payload, + (uint8_t *)&cctx->payload, sizeof(*cmd)); + EVP_DigestUpdate(md_ctx, &cctx->c_payload, sizeof(*cmd)); +} + +static int sb_verify_command(struct sb_image_ctx *ictx, + struct sb_cmd_ctx *cctx, FILE *fp, + unsigned long *tsize) +{ + struct sb_command *ccmd = &cctx->payload; + unsigned long size, asize; + char *csum, *flag = ""; + int ret; + unsigned int i; + uint8_t csn, csc = ccmd->header.checksum; + ccmd->header.checksum = 0x5a; + csn = sb_command_checksum(ccmd); + ccmd->header.checksum = csc; + + if (csc == csn) + ret = 0; + else + ret = -EINVAL; + csum = ret ? "checksum BAD" : "checksum OK"; + + switch (ccmd->header.tag) { + case ROM_NOP_CMD: + soprintf(ictx, " NOOP # %s\n", csum); + return ret; + case ROM_TAG_CMD: + if (ccmd->header.flags & ROM_TAG_CMD_FLAG_ROM_LAST_TAG) + flag = "LAST"; + soprintf(ictx, " TAG %s # %s\n", flag, csum); + sb_aes_reinit(ictx, 0); + return ret; + case ROM_LOAD_CMD: + soprintf(ictx, " LOAD addr=0x%08x length=0x%08x # %s\n", + ccmd->load.address, ccmd->load.count, csum); + + cctx->length = ccmd->load.count; + asize = roundup(cctx->length, SB_BLOCK_SIZE); + cctx->data = malloc(asize); + if (!cctx->data) + return -ENOMEM; + + size = fread(cctx->data, 1, asize, fp); + if (size != asize) { + fprintf(stderr, + "ERR: SB LOAD command payload too short!\n"); + return -EINVAL; + } + + *tsize += size; + + EVP_DigestUpdate(&ictx->md_ctx, cctx->data, asize); + sb_aes_crypt(ictx, cctx->data, cctx->data, asize); + + if (ccmd->load.crc32 != crc32(cctx->data, asize)) { + fprintf(stderr, + "ERR: SB LOAD command payload CRC32 invalid!\n"); + return -EINVAL; + } + return 0; + case ROM_FILL_CMD: + soprintf(ictx, + " FILL addr=0x%08x length=0x%08x pattern=0x%08x # %s\n", + ccmd->fill.address, ccmd->fill.count, + ccmd->fill.pattern, csum); + return 0; + case ROM_JUMP_CMD: + if (ccmd->header.flags & ROM_JUMP_CMD_FLAG_HAB) + flag = " HAB"; + soprintf(ictx, + " JUMP%s addr=0x%08x r0_arg=0x%08x # %s\n", + flag, ccmd->fill.address, ccmd->jump.argument, csum); + return 0; + case ROM_CALL_CMD: + if (ccmd->header.flags & ROM_CALL_CMD_FLAG_HAB) + flag = " HAB"; + soprintf(ictx, + " CALL%s addr=0x%08x r0_arg=0x%08x # %s\n", + flag, ccmd->fill.address, ccmd->jump.argument, csum); + return 0; + case ROM_MODE_CMD: + for (i = 0; i < ARRAY_SIZE(modetable); i++) { + if (ccmd->mode.mode == modetable[i].mode) { + soprintf(ictx, " MODE %s # %s\n", + modetable[i].name, csum); + break; + } + } + fprintf(stderr, " MODE !INVALID! # %s\n", csum); + return 0; + } + + return ret; +} + +static int sb_verify_commands(struct sb_image_ctx *ictx, + struct sb_section_ctx *sctx, FILE *fp) +{ + unsigned long size, tsize = 0; + struct sb_cmd_ctx *cctx; + int ret; + + sb_aes_reinit(ictx, 0); + + while (tsize < sctx->size) { + cctx = calloc(1, sizeof(*cctx)); + if (!cctx) + return -ENOMEM; + if (!sctx->cmd_head) { + sctx->cmd_head = cctx; + sctx->cmd_tail = cctx; + } else { + sctx->cmd_tail->cmd = cctx; + sctx->cmd_tail = cctx; + } + + size = fread(&cctx->c_payload, 1, sizeof(cctx->c_payload), fp); + if (size != sizeof(cctx->c_payload)) { + fprintf(stderr, "ERR: SB command header too short!\n"); + return -EINVAL; + } + + tsize += size; + + sb_decrypt_tag(ictx, cctx); + + ret = sb_verify_command(ictx, cctx, fp, &tsize); + if (ret) + return -EINVAL; + } + + return 0; +} + +static int sb_verify_sections_cmds(struct sb_image_ctx *ictx, FILE *fp) +{ + struct sb_boot_image_header *hdr = &ictx->payload; + struct sb_sections_header *shdr; + unsigned int i; + int ret; + struct sb_section_ctx *sctx; + unsigned long size; + char *bootable = ""; + + soprintf(ictx, "----- Verifying SB Sections and Commands -----\n"); + + for (i = 0; i < hdr->section_count; i++) { + sctx = calloc(1, sizeof(*sctx)); + if (!sctx) + return -ENOMEM; + if (!ictx->sect_head) { + ictx->sect_head = sctx; + ictx->sect_tail = sctx; + } else { + ictx->sect_tail->sect = sctx; + ictx->sect_tail = sctx; + } + + size = fread(&sctx->payload, 1, sizeof(sctx->payload), fp); + if (size != sizeof(sctx->payload)) { + fprintf(stderr, "ERR: SB section header too short!\n"); + return -EINVAL; + } + } + + size = fread(&ictx->sb_dict_key, 1, sizeof(ictx->sb_dict_key), fp); + if (size != sizeof(ictx->sb_dict_key)) { + fprintf(stderr, "ERR: SB key dictionary too short!\n"); + return -EINVAL; + } + + sb_encrypt_sb_sections_header(ictx); + sb_aes_reinit(ictx, 0); + sb_decrypt_key_dictionary_key(ictx); + + sb_aes_reinit(ictx, 0); + + sctx = ictx->sect_head; + while (sctx) { + shdr = &sctx->payload; + + if (shdr->section_flags & SB_SECTION_FLAG_BOOTABLE) { + sctx->boot = 1; + bootable = " BOOTABLE"; + } + + sctx->size = (shdr->section_size * SB_BLOCK_SIZE) + + sizeof(struct sb_command); + soprintf(ictx, "SECTION 0x%x%s # size = %i bytes\n", + shdr->section_number, bootable, sctx->size); + + if (shdr->section_flags & ~SB_SECTION_FLAG_BOOTABLE) + fprintf(stderr, " WARN: Unknown section flag(s) %08x\n", + shdr->section_flags); + + if ((shdr->section_flags & SB_SECTION_FLAG_BOOTABLE) && + (hdr->first_boot_section_id != shdr->section_number)) { + fprintf(stderr, + " WARN: Bootable section does ID not match image header ID!\n"); + } + + ret = sb_verify_commands(ictx, sctx, fp); + if (ret) + return ret; + + sctx = sctx->sect; + } + + /* + * FIXME IDEA: + * check if the first TAG command is at sctx->section_offset + */ + return 0; +} + +static int sb_verify_image_end(struct sb_image_ctx *ictx, + FILE *fp, off_t filesz) +{ + uint8_t digest[32]; + unsigned long size; + off_t pos; + int ret; + + soprintf(ictx, "------------- Verifying image end -------------\n"); + + size = fread(digest, 1, sizeof(digest), fp); + if (size != sizeof(digest)) { + fprintf(stderr, "ERR: SB key dictionary too short!\n"); + return -EINVAL; + } + + pos = ftell(fp); + if (pos != filesz) { + fprintf(stderr, "ERR: Trailing data past the image!\n"); + return -EINVAL; + } + + /* Check the image digest. */ + EVP_DigestFinal(&ictx->md_ctx, ictx->digest, NULL); + + /* Decrypt the image digest from the input image. */ + sb_aes_reinit(ictx, 0); + sb_aes_crypt(ictx, digest, digest, sizeof(digest)); + + /* Check all of 20 bytes of the SHA1 hash. */ + ret = memcmp(digest, ictx->digest, 20) ? -EINVAL : 0; + + if (ret) + soprintf(ictx, "[FAIL] Full-image checksum: BAD\n"); + else + soprintf(ictx, "[PASS] Full-image checksum: OK\n"); + + return ret; +} + + +static int sb_build_tree_from_img(struct sb_image_ctx *ictx) +{ + long filesize; + int ret; + FILE *fp; + + if (!ictx->input_filename) { + fprintf(stderr, "ERR: Missing filename!\n"); + return -EINVAL; + } + + fp = fopen(ictx->input_filename, "r"); + if (!fp) + goto err_open; + + ret = fseek(fp, 0, SEEK_END); + if (ret < 0) + goto err_file; + + filesize = ftell(fp); + if (filesize < 0) + goto err_file; + + ret = fseek(fp, 0, SEEK_SET); + if (ret < 0) + goto err_file; + + if (filesize < (signed)sizeof(ictx->payload)) { + fprintf(stderr, "ERR: File too short!\n"); + goto err_file; + } + + if (filesize & (SB_BLOCK_SIZE - 1)) { + fprintf(stderr, "ERR: The file is not aligned!\n"); + goto err_file; + } + + /* Load and verify image header */ + ret = sb_verify_image_header(ictx, fp, filesize); + if (ret) + goto err_verify; + + /* Load and verify sections and commands */ + ret = sb_verify_sections_cmds(ictx, fp); + if (ret) + goto err_verify; + + ret = sb_verify_image_end(ictx, fp, filesize); + if (ret) + goto err_verify; + + ret = 0; + +err_verify: + soprintf(ictx, "-------------------- Result -------------------\n"); + soprintf(ictx, "Verification %s\n", ret ? "FAILED" : "PASSED"); + + /* Stop the encryption session. */ + sb_aes_deinit(&ictx->cipher_ctx); + + fclose(fp); + return ret; + +err_file: + fclose(fp); +err_open: + fprintf(stderr, "ERR: Failed to load file \"%s\"\n", + ictx->input_filename); + return -EINVAL; +} + +static void sb_free_image(struct sb_image_ctx *ictx) +{ + struct sb_section_ctx *sctx = ictx->sect_head, *s_head; + struct sb_dcd_ctx *dctx = ictx->dcd_head, *d_head; + struct sb_cmd_ctx *cctx, *c_head; + + while (sctx) { + s_head = sctx; + c_head = sctx->cmd_head; + + while (c_head) { + cctx = c_head; + c_head = c_head->cmd; + if (cctx->data) + free(cctx->data); + free(cctx); + } + + sctx = sctx->sect; + free(s_head); + } + + while (dctx) { + d_head = dctx; + dctx = dctx->dcd; + free(d_head->payload); + free(d_head); + } +} + +/* + * MXSSB-MKIMAGE glue code. + */ +static int mxsimage_check_image_types(uint8_t type) +{ + if (type == IH_TYPE_MXSIMAGE) + return EXIT_SUCCESS; + else + return EXIT_FAILURE; +} + +static void mxsimage_set_header(void *ptr, struct stat *sbuf, int ifd, + struct mkimage_params *params) +{ +} + +int mxsimage_check_params(struct mkimage_params *params) +{ + if (!params) + return -1; + if (!strlen(params->imagename)) { + fprintf(stderr, + "Error: %s - Configuration file not specified, it is needed for mxsimage generation\n", + params->cmdname); + return -1; + } + + /* + * Check parameters: + * XIP is not allowed and verify that incompatible + * parameters are not sent at the same time + * For example, if list is required a data image must not be provided + */ + return (params->dflag && (params->fflag || params->lflag)) || + (params->fflag && (params->dflag || params->lflag)) || + (params->lflag && (params->dflag || params->fflag)) || + (params->xflag) || !(strlen(params->imagename)); +} + +static int mxsimage_verify_print_header(char *file, int silent) +{ + int ret; + struct sb_image_ctx ctx; + + memset(&ctx, 0, sizeof(ctx)); + + ctx.input_filename = file; + ctx.silent_dump = silent; + + ret = sb_build_tree_from_img(&ctx); + sb_free_image(&ctx); + + return ret; +} + +char *imagefile; +static int mxsimage_verify_header(unsigned char *ptr, int image_size, + struct mkimage_params *params) +{ + struct sb_boot_image_header *hdr; + + if (!ptr) + return -EINVAL; + + hdr = (struct sb_boot_image_header *)ptr; + + /* + * Check if the header contains the MXS image signatures, + * if so, do a full-image verification. + */ + if (memcmp(hdr->signature1, "STMP", 4) || + memcmp(hdr->signature2, "sgtl", 4)) + return -EINVAL; + + imagefile = params->imagefile; + + return mxsimage_verify_print_header(params->imagefile, 1); +} + +static void mxsimage_print_header(const void *hdr) +{ + if (imagefile) + mxsimage_verify_print_header(imagefile, 0); +} + +static int sb_build_image(struct sb_image_ctx *ictx, + struct image_type_params *tparams) +{ + struct sb_boot_image_header *sb_header = &ictx->payload; + struct sb_section_ctx *sctx; + struct sb_cmd_ctx *cctx; + struct sb_command *ccmd; + struct sb_key_dictionary_key *sb_dict_key = &ictx->sb_dict_key; + + uint8_t *image, *iptr; + + /* Calculate image size. */ + uint32_t size = sizeof(*sb_header) + + ictx->sect_count * sizeof(struct sb_sections_header) + + sizeof(*sb_dict_key) + sizeof(ictx->digest); + + sctx = ictx->sect_head; + while (sctx) { + size += sctx->size; + sctx = sctx->sect; + }; + + image = malloc(size); + if (!image) + return -ENOMEM; + iptr = image; + + memcpy(iptr, sb_header, sizeof(*sb_header)); + iptr += sizeof(*sb_header); + + sctx = ictx->sect_head; + while (sctx) { + memcpy(iptr, &sctx->payload, sizeof(struct sb_sections_header)); + iptr += sizeof(struct sb_sections_header); + sctx = sctx->sect; + }; + + memcpy(iptr, sb_dict_key, sizeof(*sb_dict_key)); + iptr += sizeof(*sb_dict_key); + + sctx = ictx->sect_head; + while (sctx) { + cctx = sctx->cmd_head; + while (cctx) { + ccmd = &cctx->payload; + + memcpy(iptr, &cctx->c_payload, sizeof(cctx->payload)); + iptr += sizeof(cctx->payload); + + if (ccmd->header.tag == ROM_LOAD_CMD) { + memcpy(iptr, cctx->data, cctx->length); + iptr += cctx->length; + } + + cctx = cctx->cmd; + } + + sctx = sctx->sect; + }; + + memcpy(iptr, ictx->digest, sizeof(ictx->digest)); + iptr += sizeof(ictx->digest); + + /* Configure the mkimage */ + tparams->hdr = image; + tparams->header_size = size; + + return 0; +} + +static int mxsimage_generate(struct mkimage_params *params, + struct image_type_params *tparams) +{ + int ret; + struct sb_image_ctx ctx; + + /* Do not copy the U-Boot image! */ + params->skipcpy = 1; + + memset(&ctx, 0, sizeof(ctx)); + + ctx.cfg_filename = params->imagename; + ctx.output_filename = params->imagefile; + ctx.verbose_boot = 1; + + ret = sb_build_tree_from_cfg(&ctx); + if (ret) + goto fail; + + ret = sb_encrypt_image(&ctx); + if (!ret) + ret = sb_build_image(&ctx, tparams); + +fail: + sb_free_image(&ctx); + + return ret; +} + +/* + * mxsimage parameters + */ +static struct image_type_params mxsimage_params = { + .name = "Freescale MXS Boot Image support", + .header_size = 0, + .hdr = NULL, + .check_image_type = mxsimage_check_image_types, + .verify_header = mxsimage_verify_header, + .print_header = mxsimage_print_header, + .set_header = mxsimage_set_header, + .check_params = mxsimage_check_params, + .vrec_header = mxsimage_generate, +}; + +void init_mxs_image_type(void) +{ + mkimage_register(&mxsimage_params); +} + +#else +void init_mxs_image_type(void) +{ +} +#endif |