Add mkimage support for generating and verifying MXS bootstream. The implementation here is mostly a glue code between MXSSB v0.4 and mkimage, but the long-term goal is to rectify this and merge MXSSB with mkimage more tightly. Once this code is properly in U-Boot, MXSSB shall be deprecated in favor of mkimage-mxsimage support.
Note that the mxsimage generator needs libcrypto from OpenSSL, I therefore enabled the libcrypto/libssl unconditionally.
MXSSB: http://git.denx.de/?p=mxssb.git;a=summary
The code is based on research presented at: http://www.rockbox.org/wiki/SbFileFormat
Signed-off-by: Marek Vasut marex@denx.de Cc: Tom Rini trini@ti.com Cc: Fabio Estevam fabio.estevam@freescale.com Cc: Stefano Babic sbabic@denx.de Cc: Otavio Salvador otavio@ossystems.com.br --- arch/arm/cpu/arm926ejs/mxs/mxsimage.mx23.cfg | 6 + arch/arm/cpu/arm926ejs/mxs/mxsimage.mx28.cfg | 8 + common/image.c | 1 + config.mk | 6 + doc/README.mxsimage | 165 ++ include/image.h | 1 + tools/Makefile | 2 + tools/mkimage.c | 2 + tools/mkimage.h | 1 + tools/mxsimage.c | 2312 ++++++++++++++++++++++++++ tools/mxsimage.h | 203 +++ 11 files changed, 2707 insertions(+) create mode 100644 arch/arm/cpu/arm926ejs/mxs/mxsimage.mx23.cfg create mode 100644 arch/arm/cpu/arm926ejs/mxs/mxsimage.mx28.cfg create mode 100644 doc/README.mxsimage create mode 100644 tools/mxsimage.c create mode 100644 tools/mxsimage.h
V2: Remove the time hack fixing timestamp at certain time Enable -lssl and -lcrypto only if CONFIG_MX23/CONFIG_MX28 is set
diff --git a/arch/arm/cpu/arm926ejs/mxs/mxsimage.mx23.cfg b/arch/arm/cpu/arm926ejs/mxs/mxsimage.mx23.cfg new file mode 100644 index 0000000..8118767 --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mxs/mxsimage.mx23.cfg @@ -0,0 +1,6 @@ +SECTION 0x0 BOOTABLE + TAG LAST + LOAD 0x0 spl/u-boot-spl.bin + CALL 0x14 0x0 + LOAD 0x40000100 u-boot.bin + CALL 0x40000100 0x0 diff --git a/arch/arm/cpu/arm926ejs/mxs/mxsimage.mx28.cfg b/arch/arm/cpu/arm926ejs/mxs/mxsimage.mx28.cfg new file mode 100644 index 0000000..ea772f0 --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mxs/mxsimage.mx28.cfg @@ -0,0 +1,8 @@ +SECTION 0x0 BOOTABLE + TAG LAST + LOAD 0x0 spl/u-boot-spl.bin + LOAD IVT 0x8000 0x14 + CALL HAB 0x8000 0x0 + LOAD 0x40000100 u-boot.bin + LOAD IVT 0x8000 0x40000100 + CALL HAB 0x8000 0x0 diff --git a/common/image.c b/common/image.c index 56a5a62..2c88091 100644 --- a/common/image.c +++ b/common/image.c @@ -135,6 +135,7 @@ static const table_entry_t uimage_type[] = { { IH_TYPE_SCRIPT, "script", "Script", }, { IH_TYPE_STANDALONE, "standalone", "Standalone Program", }, { IH_TYPE_UBLIMAGE, "ublimage", "Davinci UBL image",}, + { IH_TYPE_MXSIMAGE, "mxsimage", "Freescale MXS Boot Image",}, { -1, "", "", }, };
diff --git a/config.mk b/config.mk index 499eed1..58fa8ec 100644 --- a/config.mk +++ b/config.mk @@ -194,6 +194,12 @@ LDFLAGS_FINAL += --gc-sections endif
# TODO(sjg@chromium.org): Is this correct on Mac OS? + +# MXSImage needs LibSSL +ifneq ($(CONFIG_MX23)$(CONFIG_MX28),) +HOSTLIBS += -lssl -lcrypto +endif + ifdef CONFIG_FIT_SIGNATURE HOSTLIBS += -lssl -lcrypto
diff --git a/doc/README.mxsimage b/doc/README.mxsimage new file mode 100644 index 0000000..2cd4bd1 --- /dev/null +++ b/doc/README.mxsimage @@ -0,0 +1,165 @@ +Freescale i.MX233/i.MX28 SB image generator via mkimage +======================================================= + +This tool allows user to produce SB BootStream encrypted with a zero key. +Such a BootStream is then bootable on i.MX23/i.MX28. + +Usage -- producing image: +========================= +The mxsimage tool is targetted to be a simple replacement for the elftosb2 . +To generate an image, write an image configuration file and run: + + mkimage -A arm -O u-boot -T mxsimage -n <path to configuration file> \ + <output bootstream file> + +The output bootstream file is usually using the .sb file extension. Note +that the example configuration files for producing bootable BootStream with +the U-Boot bootloader can be found under arch/arm/boot/cpu/arm926ejs/mxs/ +directory. See the following files: + + mxsimage.mx23.cfg -- This is an example configuration for i.MX23 + mxsimage.mx28.cfg -- This is an example configuration for i.MX28 + +Each configuration file uses very simple instruction semantics and a few +additional rules have to be followed so that a useful image can be produced. +These semantics and rules will be outlined now. + +- Each line of the configuration file contains exactly one instruction. +- Every numeric value must be encoded in hexadecimal and in format 0xabcdef12 . +- The configuration file is a concatenation of blocks called "sections" and + optionally "DCD blocks" (see below). + - Each "section" is started by the "SECTION" instruction. + - The "SECTION" instruction has the following semantics: + + SECTION u32_section_number [BOOTABLE] + - u32_section_number :: User-selected ID of the section + - BOOTABLE :: Sets the section as bootable + + - A bootable section is one from which the BootROM starts executing + subsequent instructions or code. Exactly one section must be selected + as bootable, usually the one containing the instructions and data to + load the bootloader. + + - A "SECTION" must be immediatelly followed by a "TAG" instruction. + - The "TAG" instruction has the following semantics: + + TAG [LAST] + - LAST :: Flag denoting the last section in the file + + - After a "TAG" unstruction, any of the following instructions may follow + in any order and any quantity: + + NOOP + - This instruction does nothing + + LOAD u32_address string_filename + - Instructs the BootROM to load file pointed by "string_filename" onto + address "u32_address". + + LOAD IVT u32_address u32_IVT_entry_point + - Crafts and loads IVT onto address "u32_address" with the entry point + of u32_IVT_entry_point. + - i.MX28-specific instruction! + + LOAD DCD u32_address u32_DCD_block_ID + - Loads the DCD block with ID "u32_DCD_block_ID" onto address + "u32_address" and executes the contents of this DCD block + - i.MX28-specific instruction! + + FILL u32_address u32_pattern u32_length + - Starts to write memory from addres "u32_address" with a pattern + specified by "u32_pattern". Writes exactly "u32_length" bytes of the + pattern. + + JUMP [HAB] u32_address [u32_r0_arg] + - Jumps onto memory address specified by "u32_address" by setting this + address in PT. The BootROM will pass the "u32_r0_arg" value in ARM + register "r0" to the executed code if this option is specified. + Otherwise, ARM register "r0" will default to value 0x00000000. The + optional "HAB" flag is i.MX28-specific flag turning on the HAB boot. + + CALL [HAB] u32_address [u32_r0_arg] + - See JUMP instruction above, as the operation is exactly the same with + one difference. The CALL instruction does allow returning into the + BootROM from the executed code. U-Boot makes use of this in it's SPL + code. + + MODE string_mode + - Restart the CPU and start booting from device specified by the + "string_mode" argument. The "string_mode" differs for each CPU + and can be: + i.MX23, string_mode = USB/I2C/SPI1_FLASH/SPI2_FLASH/NAND_BCH + JTAG/SPI3_EEPROM/SD_SSP0/SD_SSP1 + i.MX28, string_mode = USB/I2C/SPI2_FLASH/SPI3_FLASH/NAND_BCH + JTAG/SPI2_EEPROM/SD_SSP0/SD_SSP1 + + - An optional "DCD" blocks can be added at the begining of the configuration + file. Note that the DCD is only supported on i.MX28. + - The DCD blocks must be inserted before the first "section" in the + configuration file. + - The DCD block has the following semantics: + + DCD u32_DCD_block_ID + - u32_DCD_block_ID :: The ID number of the DCD block, must match + the ID number used by "LOAD DCD" instruction. + + - The DCD block must be followed by one of the following instructions. All + of the instructions operate either on 1, 2 or 4 bytes. This is selected by + the 'n' suffix of the instruction: + + WRITE.n u32_address u32_value + - Write the "u32_value" to the "u32_address" address. + + ORR.n u32_address u32_value + - Read the "u32_address", perform a bitwise-OR with the "u32_value" and + write the result back to "u32_address". + + ANDC.n u32_address u32_value + - Read the "u32_address", perform a bitwise-AND with the complement of + "u32_value" and write the result back to "u32_address". + + EQZ.n u32_address u32_count + - Read the "u32_address" at most "u32_count" times and test if the value + read is zero. If it is, break the loop earlier. + + NEZ.n u32_address u32_count + - Read the "u32_address" at most "u32_count" times and test if the value + read is non-zero. If it is, break the loop earlier. + + EQ.n u32_address u32_mask + - Read the "u32_address" in a loop and test if the result masked with + "u32_mask" equals the "u32_mask". If the values are equal, break the + reading loop. + + NEQ.n u32_address u32_mask + - Read the "u32_address" in a loop and test if the result masked with + "u32_mask" does not equal the "u32_mask". If the values are not equal, + break the reading loop. + + NOOP + - This instruction does nothing. + +- If the verbose output from the BootROM is enabled, the BootROM will produce a + letter on the Debug UART for each instruction it started processing. Here is a + mapping between the above instructions and the BootROM verbose output: + + H -- SB Image header loaded + T -- TAG instruction + N -- NOOP instruction + L -- LOAD instruction + F -- FILL instruction + J -- JUMP instruction + C -- CALL instruction + M -- MODE instruction + +Usage -- verifying image: +========================= + +The mxsimage can also verify and dump contents of an image. Use the following +syntax to verify and dump contents of an image: + + mkimage -l <input bootstream file> + +This will output all the information from the SB image header and all the +instructions contained in the SB image. It will also check if the various +checksums in the SB image are correct. diff --git a/include/image.h b/include/image.h index f93a393..ee6eb8d 100644 --- a/include/image.h +++ b/include/image.h @@ -212,6 +212,7 @@ struct lmb; #define IH_TYPE_AISIMAGE 13 /* TI Davinci AIS Image */ #define IH_TYPE_KERNEL_NOLOAD 14 /* OS Kernel Image, can run from any load address */ #define IH_TYPE_PBLIMAGE 15 /* Freescale PBL Boot Image */ +#define IH_TYPE_MXSIMAGE 16 /* Freescale MXSBoot Image */
/* * Compression Types diff --git a/tools/Makefile b/tools/Makefile index 33fad6b..bbae5a2 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -83,6 +83,7 @@ NOPED_OBJ_FILES-y += aisimage.o NOPED_OBJ_FILES-y += kwbimage.o NOPED_OBJ_FILES-y += pblimage.o NOPED_OBJ_FILES-y += imximage.o +NOPED_OBJ_FILES-y += mxsimage.o NOPED_OBJ_FILES-y += image-host.o NOPED_OBJ_FILES-y += omapimage.o NOPED_OBJ_FILES-y += mkenvimage.o @@ -209,6 +210,7 @@ $(obj)mkimage$(SFX): $(obj)aisimage.o \ $(obj)image-host.o \ $(FIT_SIG_OBJS) \ $(obj)imximage.o \ + $(obj)mxsimage.o \ $(obj)kwbimage.o \ $(obj)pblimage.o \ $(obj)md5.o \ diff --git a/tools/mkimage.c b/tools/mkimage.c index b700b9e..635df02 100644 --- a/tools/mkimage.c +++ b/tools/mkimage.c @@ -144,6 +144,8 @@ main (int argc, char **argv) init_kwb_image_type (); /* Init Freescale imx Boot image generation/list support */ init_imx_image_type (); + /* Init Freescale mxs Boot image generation/list support */ + init_mxs_image_type (); /* Init FIT image generation/list support */ init_fit_image_type (); /* Init TI OMAP Boot image generation/list support */ diff --git a/tools/mkimage.h b/tools/mkimage.h index 950e190..66f7596 100644 --- a/tools/mkimage.h +++ b/tools/mkimage.h @@ -158,6 +158,7 @@ void init_pbl_image_type(void); void init_ais_image_type(void); void init_kwb_image_type (void); void init_imx_image_type (void); +void init_mxs_image_type (void); void init_default_image_type (void); void init_fit_image_type (void); void init_ubl_image_type(void); diff --git a/tools/mxsimage.c b/tools/mxsimage.c new file mode 100644 index 0000000..b42855d --- /dev/null +++ b/tools/mxsimage.c @@ -0,0 +1,2312 @@ +/* + * Freescale i.MX23/i.MX28 SB image generator + * + * Copyright (C) 2012-2013 Marek Vasut marex@denx.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#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; + + 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); +} diff --git a/tools/mxsimage.h b/tools/mxsimage.h new file mode 100644 index 0000000..6d5ce8f --- /dev/null +++ b/tools/mxsimage.h @@ -0,0 +1,203 @@ +/* + * Freescale i.MX28 SB image generator + * + * Copyright (C) 2012 Marek Vasut marex@denx.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __MXSSB_H__ +#define __MXSSB_H__ + +#include <stdint.h> +#include <arpa/inet.h> + +#define SB_BLOCK_SIZE 16 + +#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + +struct sb_boot_image_version { + uint16_t major; + uint16_t pad0; + uint16_t minor; + uint16_t pad1; + uint16_t revision; + uint16_t pad2; +}; + +struct sb_boot_image_header { + union { + uint8_t digest[20]; /* SHA1 of the header. */ + struct { + uint8_t iv[16]; /* CBC-MAC initialization vector. */ + uint8_t extra[4]; + }; + }; + uint8_t signature1[4]; /* 'STMP' */ + uint8_t major_version; /* Major version of the image format. */ + uint8_t minor_version; /* Minor version of the image format. */ + uint16_t flags; /* Flags associated with the image. */ + uint32_t image_blocks; /* Size of the image in 16b blocks. */ + uint32_t first_boot_tag_block; /* Offset of the first tag in 16b blocks. */ + uint32_t first_boot_section_id; /* ID of the section to boot from. */ + uint16_t key_count; /* Amount of crypto keys. */ + uint16_t key_dictionary_block; /* Offset to the key dictionary in 16b blocks. */ + uint16_t header_blocks; /* Size of this header in 16b blocks. */ + uint16_t section_count; /* Amount of section headers. */ + uint16_t section_header_size; /* Section header size in 16b blocks. */ + uint8_t padding0[2]; /* Padding to align timestamp to uint64_t. */ + uint8_t signature2[4]; /* 'sgtl' (since v1.1) */ + uint64_t timestamp_us; /* Image generation date, in microseconds since 1.1.2000 . */ + struct sb_boot_image_version + product_version; /* Product version. */ + struct sb_boot_image_version + component_version; /* Component version. */ + uint16_t drive_tag; /* Drive tag for the system drive. (since v1.1) */ + uint8_t padding1[6]; /* Padding. */ +}; + +#define SB_VERSION_MAJOR 1 +#define SB_VERSION_MINOR 1 + +#define SB_IMAGE_FLAG_VERBOSE (1 << 0) /* Enable to HTLLC verbose boot report. */ + +struct sb_key_dictionary_key { + uint8_t cbc_mac[SB_BLOCK_SIZE]; /* The CBC-MAC of image and sections header. */ + uint8_t key[SB_BLOCK_SIZE]; /* The AES key encrypted by image key (zero). */ +}; + +struct sb_ivt_header { + uint32_t header; + uint32_t entry; + uint32_t reserved1; + uint32_t dcd; + uint32_t boot_data; + uint32_t self; + uint32_t csf; + uint32_t reserved2; +}; + +#define SB_HAB_IVT_TAG 0xd1UL +#define SB_HAB_DCD_TAG 0xd2UL + +#define SB_HAB_VERSION 0x40UL + +/* + * The "size" field in the IVT header is not naturally aligned, + * use this macro to fill first 4 bytes of the IVT header without + * causing issues on some systems (esp. M68k, PPC, MIPS-BE, ARM-BE). + */ +static inline uint32_t sb_hab_ivt_header(void) +{ + uint32_t ret = 0; + ret |= SB_HAB_IVT_TAG << 24; + ret |= sizeof(struct sb_ivt_header) << 16; + ret |= SB_HAB_VERSION; + return htonl(ret); +} + +struct sb_sections_header { + uint32_t section_number; /* Section number. */ + uint32_t section_offset; /* Offset of this sections first instruction after "TAG". */ + uint32_t section_size; /* Size of the section in 16b blocks. */ + uint32_t section_flags; /* Section flags. */ +}; + +#define SB_SECTION_FLAG_BOOTABLE (1 << 0) + +struct sb_command { + struct { + uint8_t checksum; + uint8_t tag; + uint16_t flags; +#define ROM_TAG_CMD_FLAG_ROM_LAST_TAG 0x1 +#define ROM_LOAD_CMD_FLAG_DCD_LOAD 0x1 /* MX28 only */ +#define ROM_JUMP_CMD_FLAG_HAB 0x1 /* MX28 only */ +#define ROM_CALL_CMD_FLAG_HAB 0x1 /* MX28 only */ + } header; + + union { + + struct { + uint32_t reserved[3]; + } nop; + struct { + uint32_t section_number; + uint32_t section_length; + uint32_t section_flags; + } tag; + struct { + uint32_t address; + uint32_t count; + uint32_t crc32; + } load; + struct { + uint32_t address; + uint32_t count; + uint32_t pattern; + } fill; + struct { + uint32_t address; + uint32_t reserved; + /* Passed in register r0 before JUMP */ + uint32_t argument; + } jump; + struct { + uint32_t address; + uint32_t reserved; + /* Passed in register r0 before CALL */ + uint32_t argument; + } call; + struct { + uint32_t reserved1; + uint32_t reserved2; + uint32_t mode; + } mode; + + }; +}; + +/* + * Most of the mode names are same or at least similar + * on i.MX23 and i.MX28, but some of the mode names + * differ. The "name" field represents the mode name + * on i.MX28 as seen in Table 12-2 of the datasheet. + * The "altname" field represents the differently named + * fields on i.MX23 as seen in Table 35-3 of the + * datasheet. + */ +static const struct { + const char *name; + const char *altname; + const uint8_t mode; +} modetable[] = { + { "USB", NULL, 0x00 }, + { "I2C", NULL, 0x01 }, + { "SPI2_FLASH", "SPI1_FLASH", 0x02 }, + { "SPI3_FLASH", "SPI2_FLASH", 0x03 }, + { "NAND_BCH", NULL, 0x04 }, + { "JTAG", NULL, 0x06 }, + { "SPI3_EEPROM", "SPI2_EEPROM", 0x08 }, + { "SD_SSP0", NULL, 0x09 }, + { "SD_SSP1", NULL, 0x0A } +}; + +enum sb_tag { + ROM_NOP_CMD = 0x00, + ROM_TAG_CMD = 0x01, + ROM_LOAD_CMD = 0x02, + ROM_FILL_CMD = 0x03, + ROM_JUMP_CMD = 0x04, + ROM_CALL_CMD = 0x05, + ROM_MODE_CMD = 0x06 +}; + +struct sb_source_entry { + uint8_t tag; + uint32_t address; + uint32_t flags; + char *filename; +}; + +#endif /* __MXSSB_H__ */