Furquan Shaikh (furquan@google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/14896
-gerrit
commit 0cb1d0543e6a86f9a06acd097967e8e4362fa13b Author: Furquan Shaikh furquan@google.com Date: Thu May 19 16:12:16 2016 -0700
ifwitool: Add new tool for managing IFWI images
- Supports following operations: 1. add raw/dir sub-partition 2. extract raw/dir sub-partition 3. print info 4. delete raw sub-partition 5. replace raw/dir sub-partition
Change-Id: I683a0ab13cc50eb60eecca34db4a8ffefc8dccbd Signed-off-by: Furquan Shaikh furquan@google.com --- util/cbfstool/Makefile | 2 + util/cbfstool/Makefile.inc | 8 + util/cbfstool/ifwitool.c | 1975 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 1985 insertions(+)
diff --git a/util/cbfstool/Makefile b/util/cbfstool/Makefile index 61a1a63..f49da3e 100644 --- a/util/cbfstool/Makefile +++ b/util/cbfstool/Makefile @@ -10,6 +10,7 @@ OBJCOPY ?= objcopy all: $(objutil)/cbfstool/cbfstool \ $(objutil)/cbfstool/fmaptool \ $(objutil)/cbfstool/rmodtool \ + $(objutil)/cbfstool/ifwitool \
.PHONY: clean clean: @@ -17,6 +18,7 @@ clean: $(RM) $(objutil)/cbfstool/cbfstool $(cbfsobj) $(RM) $(objutil)/cbfstool/fmaptool $(fmapobj) $(RM) $(objutil)/cbfstool/rmodtool $(rmodobj) + $(RM) $(objutil)/cbfstool/ifwitool $(ifwiobj)
linux_trampoline.c: linux_trampoline.S rm -f linux_trampoline.c diff --git a/util/cbfstool/Makefile.inc b/util/cbfstool/Makefile.inc index aa42f01..6c2b100 100644 --- a/util/cbfstool/Makefile.inc +++ b/util/cbfstool/Makefile.inc @@ -58,6 +58,10 @@ rmodobj += common.o rmodobj += elfheaders.o rmodobj += xdr.o
+ifwiobj := +ifwiobj += ifwitool.o +ifwiobj += common.o + TOOLCFLAGS ?= -Werror -Wall -Wextra TOOLCFLAGS += -Wcast-qual -Wmissing-prototypes -Wredundant-decls -Wshadow TOOLCFLAGS += -Wstrict-prototypes -Wwrite-strings @@ -132,6 +136,10 @@ $(objutil)/cbfstool/rmodtool: $(addprefix $(objutil)/cbfstool/,$(rmodobj)) printf " HOSTCC $(subst $(objutil)/,,$(@)) (link)\n" $(HOSTCC) $(TOOLLDFLAGS) -o $@ $(addprefix $(objutil)/cbfstool/,$(rmodobj))
+$(objutil)/cbfstool/ifwitool: $(addprefix $(objutil)/cbfstool/,$(ifwiobj)) + printf " HOSTCC $(subst $(objutil)/,,$(@)) (link)\n" + $(HOSTCC) $(TOOLLDFLAGS) -o $@ $(addprefix $(objutil)/cbfstool/,$(ifwiobj)) + # Yacc source is superset of header $(objutil)/cbfstool/fmd.o: TOOLCFLAGS += -Wno-redundant-decls $(objutil)/cbfstool/fmd_parser.o: TOOLCFLAGS += -Wno-redundant-decls diff --git a/util/cbfstool/ifwitool.c b/util/cbfstool/ifwitool.c new file mode 100644 index 0000000..0359bc6 --- /dev/null +++ b/util/cbfstool/ifwitool.c @@ -0,0 +1,1975 @@ +/* + * ifwitool, CLI utility for IFWI manipulation + * + * Copyright 2016 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <commonlib/endian.h> +#include <getopt.h> +#include <stdlib.h> +#include <time.h> + +#include "common.h" + +/* + * BPDT is Boot Partition Descriptor Table. It is located at the start of a + * logical boot partition(LBP). It stores information about the critical + * sub-partitions present within the LBP. + * + * S-BPDT is Secondary Boot Partition Descriptor Table. It is located after the + * critical sub-partitions and contains information about the non-critical + * sub-partitions present within the LBP. + * + * Both tables are identified by BPDT_SIGNATURE stored at the start of the + * table. + */ +#define BPDT_SIGNATURE (0x000055AA) + +/* Parameters passed in by caller. */ +static struct param { + const char *file_name; + const char *subpart_name; + const char *image_name; + bool dir_ops; + const char *dentry_name; +} param; + +struct bpdt_header { + /* + * This is used to identify start of BPDT. It should always be + * BPDT_SIGNATURE. + */ + uint32_t signature; + /* Count of BPDT entries present. */ + uint16_t descriptor_count; + /* Version - Currently supported = 1. */ + uint16_t bpdt_version; + /* Unused - Should be 0. */ + uint32_t xor_redundant_block; + /* Version of IFWI build. */ + uint32_t ifwi_version; + /* Version of FIT tool used to create IFWI. */ + uint64_t fit_tool_version; +} __attribute__((packed)); +#define BPDT_HEADER_SIZE (sizeof(struct bpdt_header)) + +struct bpdt_entry { + /* Type of sub-partition. */ + uint16_t type; + /* Attributes of sub-partition. */ + uint16_t flags; + /* Offset of sub-partition from beginning of LBP. */ + uint32_t offset; + /* Size in bytes of sub-partition. */ + uint32_t size; +} __attribute__((packed)); +#define BPDT_ENTRY_SIZE (sizeof(struct bpdt_entry)) + +struct bpdt { + struct bpdt_header h; + /* In practice, this could be an array of 0 to n entries. */ + struct bpdt_entry e[0]; +} __attribute__((packed)); + +static inline size_t bpdt_size(struct bpdt_header *h) +{ + return (sizeof(*h) + BPDT_ENTRY_SIZE * h->descriptor_count); +} + +/* Minimum size in bytes allocated to BPDT in IFWI. */ +#define BPDT_MIN_SIZE (512) + +/* Header to define directory header for sub-partition. */ +struct subpart_dir_header { + /* Should be SUBPART_DIR_MARKER. */ + uint32_t marker; + /* Number of directory entries in the sub-partition. */ + uint32_t num_entries; + /* Currenty supported - 1. */ + uint8_t header_version; + /* Currenty supported - 1. */ + uint8_t entry_version; + /* Length of directory header in bytes. */ + uint8_t header_length; + /* + * 8-bit XOR checksum from first byte of header to last byte of + * directory entry. + */ + uint8_t checksum; + /* ASCII short name of sub-partition. */ + uint8_t name[4]; +} __attribute__((packed)); +#define SUBPART_DIR_HEADER_SIZE \ + (sizeof(struct subpart_dir_header)) +#define SUBPART_DIR_MARKER 0x44504324 +#define SUBPART_DIR_HEADER_VERSION_SUPPORTED 1 +#define SUBPART_DIR_ENTRY_VERSION_SUPPORTED 1 + +/* Structure for each directory entry for sub-partition. */ +struct subpart_dir_entry { + /* Name of directory entry - Not guaranteed to be NULL-terminated. */ + uint8_t name[12]; + /* Offset of entry from beginning of sub-partition. */ + uint32_t offset; + /* Length in bytes of sub-directory entry. */ + uint32_t length; + /* Must be zero. */ + uint32_t rsvd; +} __attribute__((packed)); +#define SUBPART_DIR_ENTRY_SIZE \ + (sizeof(struct subpart_dir_entry)) + +struct subpart_dir { + struct subpart_dir_header h; + /* In practice, this could be an array of 0 to n entries. */ + struct subpart_dir_entry e[0]; +} __attribute__((packed)); + +static inline size_t subpart_dir_size(struct subpart_dir_header *h) +{ + return (sizeof(*h) + SUBPART_DIR_ENTRY_SIZE * h->num_entries); +} + +struct manifest_header { + uint32_t header_type; + uint32_t header_length; + uint32_t header_version; + uint32_t flags; + uint32_t vendor; + uint32_t date; + uint32_t size; + uint32_t id; + uint32_t rsvd; + uint64_t version; + uint32_t svn; + uint64_t rsvd1; + uint8_t rsvd2[64]; + uint32_t modulus_size; + uint32_t exponent_size; + uint8_t public_key[256]; + uint32_t exponent; + uint8_t signature[256]; +} __attribute__((packed)); + +#define DWORD_SIZE 4 +#define MANIFEST_HDR_SIZE (sizeof(struct manifest_header)) +#define MANIFEST_ID_MAGIC (0x324e4d24) + +struct module { + uint8_t name[12]; + uint8_t type; + uint8_t hash_alg; + uint16_t hash_size; + uint32_t metadata_size; + uint8_t metadata_hash[32]; +} __attribute__((packed)); + +#define MODULE_SIZE (sizeof(struct module)) + +struct signed_pkg_info_ext { + uint32_t ext_type; + uint32_t ext_length; + uint8_t name[4]; + uint32_t vcn; + uint8_t bitmap[16]; + uint32_t svn; + uint8_t rsvd[16]; +} __attribute__((packed)); + +#define SIGNED_PKG_INFO_EXT_TYPE 0x15 +#define SIGNED_PKG_INFO_EXT_SIZE \ + (sizeof(struct signed_pkg_info_ext)) + +/* + * Attributes for various IFWI sub-partitions. + * LIES_WITHIN_BPDT_4K = Sub-Partition should lie within the same 4K block as + * BPDT. + * NON_CRITICAL_SUBPART = Sub-Partition entry should be present in S-BPDT. + * CONTAINS_DIR = Sub-Partition contains directory. + * AUTO_GENERATED = Sub-Partition is generated by the tool. + * MANDATORY_BPDT_ENTRY = Even if sub-partition is deleted, BPDT should contain + * an entry for it with size 0 and offset 0. + */ +enum subpart_attributes { + LIES_WITHIN_BPDT_4K = (1 << 0), + NON_CRITICAL_SUBPART = (1 << 1), + CONTAINS_DIR = (1 << 2), + AUTO_GENERATED = (1 << 3), + MANDATORY_BPDT_ENTRY = (1 << 4), +}; + +/* Type value for various IFWI sub-partitions. */ +enum bpdt_entry_type { + SMIP_TYPE = 0, + CSE_RBE_TYPE = 1, + CSE_BUP_TYPE = 2, + UCODE_TYPE = 3, + IBB_TYPE = 4, + S_BPDT_TYPE = 5, + OBB_TYPE = 6, + CSE_MAIN_TYPE = 7, + ISH_TYPE = 8, + CSE_IDLM_TYPE = 9, + IFP_OVERRIDE_TYPE = 10, + DEBUG_TOKENS_TYPE = 11, + UFS_PHY_TYPE = 12, + UFS_GPP_TYPE = 13, + PMC_TYPE = 14, + IUNIT_TYPE = 15, + NVM_CONFIG_TYPE = 16, + UEP_TYPE = 17, + UFS_RATE_B_TYPE = 18, + MAX_SUBPARTS = 19, +}; + +/* + * There are two order requirements for an IFWI image: + * 1. Order in which the sub-partitions lie within the BPDT entries. + * 2. Order in which the sub-partitions lie within the image. + * + * header_order defines #1 i.e. the order in which the sub-partitions should + * appear in the BPDT entries. pack_order defines #2 i.e. the order in which + * sub-partitions appear in the IFWI image. pack_order controls the offset and + * thus sub-partitions would have increasing offsets as we loop over pack_order. + */ +const enum bpdt_entry_type bpdt_header_order[MAX_SUBPARTS] = { + CSE_IDLM_TYPE, + IFP_OVERRIDE_TYPE, + S_BPDT_TYPE, + CSE_RBE_TYPE, + UFS_PHY_TYPE, + UFS_GPP_TYPE, + CSE_BUP_TYPE, + UEP_TYPE, + NVM_CONFIG_TYPE, + SMIP_TYPE, + PMC_TYPE, + UCODE_TYPE, + IBB_TYPE, + DEBUG_TOKENS_TYPE, + UFS_RATE_B_TYPE, + ISH_TYPE, + CSE_MAIN_TYPE, + OBB_TYPE, + IUNIT_TYPE, +}; + +const enum bpdt_entry_type bpdt_pack_order[MAX_SUBPARTS] = { + CSE_IDLM_TYPE, + UFS_PHY_TYPE, + UFS_GPP_TYPE, + IFP_OVERRIDE_TYPE, + UEP_TYPE, + IBB_TYPE, + NVM_CONFIG_TYPE, + SMIP_TYPE, + CSE_RBE_TYPE, + PMC_TYPE, + CSE_BUP_TYPE, + UCODE_TYPE, + DEBUG_TOKENS_TYPE, + UFS_RATE_B_TYPE, + S_BPDT_TYPE, + ISH_TYPE, + CSE_MAIN_TYPE, + OBB_TYPE, + IUNIT_TYPE, +}; + +/* Utility functions. */ +enum ifwi_ret { + COMMAND_ERR = -1, + NO_ACTION_REQUIRED = 0, + REPACK_REQUIRED = 1, +}; + +struct dir_ops { + enum ifwi_ret (*dir_add)(int); +}; + +static enum ifwi_ret ibbp_dir_add(int); + +const struct subpart_info { + const char *name; + const char *readable_name; + uint32_t attr; + struct dir_ops dir_ops; +} subparts[MAX_SUBPARTS] = { + /* OEM SMIP */ + [SMIP_TYPE] = {"SMIP", "SMIP", CONTAINS_DIR, {NULL}}, + /* CSE RBE */ + [CSE_RBE_TYPE] = {"RBEP", "CSE_RBE", CONTAINS_DIR | + MANDATORY_BPDT_ENTRY, {NULL}}, + /* CSE BUP */ + [CSE_BUP_TYPE] = {"FTPR", "CSE_BUP", CONTAINS_DIR | + MANDATORY_BPDT_ENTRY, {NULL}}, + /* uCode */ + [UCODE_TYPE] = {"UCOD", "Microcode", CONTAINS_DIR, {NULL}}, + /* IBB */ + [IBB_TYPE] = {"IBBP", "Bootblock", CONTAINS_DIR, {ibbp_dir_add}}, + /* S-BPDT */ + [S_BPDT_TYPE] = {"S_BPDT", "S-BPDT", AUTO_GENERATED | + MANDATORY_BPDT_ENTRY, {NULL}}, + /* OBB */ + [OBB_TYPE] = {"OBBP", "OEM boot block", CONTAINS_DIR | + NON_CRITICAL_SUBPART, {NULL}}, + /* CSE Main */ + [CSE_MAIN_TYPE] = {"NFTP", "CSE_MAIN", CONTAINS_DIR | + NON_CRITICAL_SUBPART, {NULL}}, + /* ISH */ + [ISH_TYPE] = {"ISHP", "ISH", NON_CRITICAL_SUBPART, {NULL}}, + /* CSE IDLM */ + [CSE_IDLM_TYPE] = {"DLMP", "CSE_IDLM", CONTAINS_DIR | + MANDATORY_BPDT_ENTRY, {NULL}}, + /* IFP Override */ + [IFP_OVERRIDE_TYPE] = {"IFP_OVERRIDE", "IFP_OVERRIDE", + LIES_WITHIN_BPDT_4K | MANDATORY_BPDT_ENTRY, + {NULL}}, + /* Debug Tokens */ + [DEBUG_TOKENS_TYPE] = {"DEBUG_TOKENS", "Debug Tokens", 0, {NULL}}, + /* UFS Phy Configuration */ + [UFS_PHY_TYPE] = {"UFS_PHY", "UFS Phy", LIES_WITHIN_BPDT_4K | + MANDATORY_BPDT_ENTRY, {NULL}}, + /* UFS GPP LUN ID */ + [UFS_GPP_TYPE] = {"UFS_GPP", "UFS GPP", LIES_WITHIN_BPDT_4K | + MANDATORY_BPDT_ENTRY, {NULL}}, + /* PMC */ + [PMC_TYPE] = {"PMCP", "PMC firmware", CONTAINS_DIR, {NULL}}, + /* IUNIT */ + [IUNIT_TYPE] = {"IUNP", "IUNIT", NON_CRITICAL_SUBPART, {NULL}}, + /* NVM Config */ + [NVM_CONFIG_TYPE] = {"NVM_CONFIG", "NVM Config", 0, {NULL}}, + /* UEP */ + [UEP_TYPE] = {"UEP", "UEP", LIES_WITHIN_BPDT_4K | MANDATORY_BPDT_ENTRY, + {NULL}}, + /* UFS Rate B Config */ + [UFS_RATE_B_TYPE] = {"UFS_RATE_B", "UFS Rate B Config", 0, {NULL}}, +}; + +struct ifwi_image { + /* Data read from input file. */ + struct buffer input_buff; + + /* BPDT header and entries. */ + struct buffer bpdt; + size_t input_ifwi_start_offset; + size_t input_ifwi_end_offset; + + /* Subpartition content. */ + struct buffer subpart_buf[MAX_SUBPARTS]; +} ifwi_image; + +static void alloc_buffer(struct buffer *b, size_t s, const char *n) +{ + if (buffer_create(b, s, n) == 0) + return; + + ERROR("Buffer allocation failure for %s (size = %zx).\n", n, s); + exit(-1); +} + +/* + * Read header/entry members in little-endian format. + * Returns the offset upto which the read was performed. +*/ +static size_t read_member(void *src, size_t offset, size_t size_bytes, + void *dst) +{ + switch (size_bytes) { + case 1: + *(uint8_t *)dst = read_at_le8(src, offset); + break; + case 2: + *(uint16_t *)dst = read_at_le16(src, offset); + break; + case 4: + *(uint32_t *)dst = read_at_le32(src, offset); + break; + case 8: + *(uint64_t *)dst = read_at_le64(src, offset); + break; + default: + ERROR("Read size not supported %zd\n", size_bytes); + exit(-1); + } + + return (offset + size_bytes); +} + +/* + * Convert to little endian format. + * Returns the offset upto which the fixup was performed. + */ +static size_t fix_member(void *data, size_t offset, size_t size_bytes) +{ + uint8_t *src = (uint8_t *)data + offset; + + switch (size_bytes) { + case 1: + write_at_le8(data, *(uint8_t *)src, offset); + break; + case 2: + write_at_le16(data, *(uint16_t *)src, offset); + break; + case 4: + write_at_le32(data, *(uint32_t *)src, offset); + break; + case 8: + write_at_le64(data, *(uint64_t *)src, offset); + break; + default: + ERROR("Write size not supported %zd\n", size_bytes); + exit(-1); + } + return (offset + size_bytes); +} + + +static void print_subpart_dir(struct subpart_dir *s) +{ + if (verbose == 0) + return; + + size_t i; + + printf("%-25s 0x%-23.8x\n", "Marker", s->h.marker); + printf("%-25s %-25d\n", "Num entries", s->h.num_entries); + printf("%-25s %-25d\n", "Header Version", s->h.header_version); + printf("%-25s %-25d\n", "Entry Version", s->h.entry_version); + printf("%-25s 0x%-23x\n", "Header Length", s->h.header_length); + printf("%-25s 0x%-23x\n", "Checksum", s->h.checksum); + printf("%-25s ", "Name"); + for (i = 0; i < sizeof(s->h.name); i++) + printf("%c", s->h.name[i]); + + printf("\n"); + + printf("%-25s%-25s%-25s%-25s%-25s\n", "Entry #", "Name", "Offset", + "Length", "Rsvd"); + + printf("==============================================================" + "===========================================================\n"); + + for (i = 0; i < s->h.num_entries; i++) { + printf("%-25zd%-25.12s0x%-23x0x%-23x0x%-23x\n", i+1, + s->e[i].name, s->e[i].offset, s->e[i].length, + s->e[i].rsvd); + } + + printf("==============================================================" + "===========================================================\n"); +} + +static void bpdt_print_header(struct bpdt_header *h, const char *name) +{ + if (verbose == 0) + return; + + printf("%-25s %-25s\n", "Header", name); + printf("%-25s 0x%-23.8x\n", "Signature", h->signature); + printf("%-25s %-25d\n", "Descriptor count", h->descriptor_count); + printf("%-25s %-25d\n", "BPDT Version", h->bpdt_version); + printf("%-25s 0x%-23x\n", "XOR checksum", h->xor_redundant_block); + printf("%-25s 0x%-23x\n", "IFWI Version", h->ifwi_version); + printf("%-25s 0x%-23lx\n", "FIT Tool Version", h->fit_tool_version); +} + +static void bpdt_print_entries(struct bpdt_entry *e, size_t count, + const char *name) +{ + if (verbose == 0) + return; + + printf("%s entries\n", name); + + printf("%-25s%-25s%-25s%-25s%-25s%-25s%-25s%-25s\n", "Entry #", + "Sub-Partition", "Name", "Type", "Flags", "Offset", "Size", + "File Offset"); + + printf("==============================================================" + "==============================================================" + "==============================================================" + "===============\n"); + + + size_t i; + for (i = 0; i < count; i++) { + printf("%-25zd%-25s%-25s%-25d0x%-23.08x0x%-23x0x%-23x0x%-23zx" + "\n", i+1, subparts[e[i].type].name, + subparts[e[i].type].readable_name, e[i].type, e[i].flags, + e[i].offset, e[i].size, + e[i].offset + ifwi_image.input_ifwi_start_offset); + } + + printf("==============================================================" + "==============================================================" + "==============================================================" + "===============\n"); + +} + +static void bpdt_validate_header(struct bpdt_header *h, const char *name) +{ + assert (h->signature == BPDT_SIGNATURE); + + if (h->bpdt_version != 1) { + ERROR("Invalid header : %s\n", name); + exit(-1); + } + + DEBUG("Validated header : %s\n", name); +} + +static void bpdt_read_header(void *data, struct bpdt_header *h, + const char *name) +{ + size_t offset = 0; + + offset = read_member(data, offset, sizeof(h->signature), &h->signature); + offset = read_member(data, offset, sizeof(h->descriptor_count), + &h->descriptor_count); + offset = read_member(data, offset, sizeof(h->bpdt_version), + &h->bpdt_version); + offset = read_member(data, offset, sizeof(h->xor_redundant_block), + &h->xor_redundant_block); + offset = read_member(data, offset, sizeof(h->ifwi_version), + &h->ifwi_version); + offset = read_member(data, offset, sizeof(h->fit_tool_version), + &h->fit_tool_version); + + bpdt_validate_header(h, name); + bpdt_print_header(h, name); +} + +static void bpdt_read_entries(void *data, struct bpdt *bpdt, const char *name) +{ + size_t i, offset = 0; + struct bpdt_entry *e = &bpdt->e[0]; + size_t count = bpdt->h.descriptor_count; + + for (i = 0; i < count; i++) { + offset = read_member(data, offset, sizeof(e[i].type), + &e[i].type); + offset = read_member(data, offset, sizeof(e[i].flags), + &e[i].flags); + offset = read_member(data, offset, sizeof(e[i].offset), + &e[i].offset); + offset = read_member(data, offset, sizeof(e[i].size), + &e[i].size); + } + + bpdt_print_entries(e, count, name); +} + +/* + * Given type of sub-partition, identify BPDT entry for it. + * Sub-Partition could lie either within BPDT or S-BPDT. + */ +static struct bpdt_entry *__find_entry_by_type(struct bpdt_entry *e, + size_t count, int type) +{ + size_t i; + for (i = 0; i < count; i++) { + if (e[i].type == type) + break; + } + + if (i == count) + return NULL; + + return &e[i]; +} + +static struct bpdt_entry *find_entry_by_type(int type) +{ + struct bpdt *b = buffer_get(&ifwi_image.bpdt); + if (b == NULL) + return NULL; + + struct bpdt_entry *curr = __find_entry_by_type(&b->e[0], + b->h.descriptor_count, + type); + + if (curr) + return curr; + + b = buffer_get(&ifwi_image.subpart_buf[S_BPDT_TYPE]); + if (b == NULL) + return NULL; + + return __find_entry_by_type(&b->e[0], b->h.descriptor_count, type); +} + +/* + * Find sub-partition type given its name. If the name does not exist, returns + * -1. + */ +static int find_type_by_name(const char *name) +{ + int i; + + for (i = 0; i < MAX_SUBPARTS; i++) { + if ((strlen(subparts[i].name) == strlen(name)) && + (!strcmp(subparts[i].name, name))) + break; + } + + if (i == MAX_SUBPARTS) { + ERROR("Invalid sub-partition name %s.\n", name); + return -1; + } + + return i; +} + +/* + * Read the content of a sub-partition from input file and store it in + * ifwi_image.subpart_buf[SUB-PARTITION_TYPE]. + * + * Returns the maximum offset occupied by the sub-partitions. + */ +static size_t read_subpart_buf(void *data, size_t size, struct bpdt_entry *e, + size_t count) +{ + size_t i, type; + struct buffer *buf; + size_t max_offset = 0; + + for (i = 0; i < count; i++) { + type = e[i].type; + + if (type >= MAX_SUBPARTS) { + ERROR("Invalid sub-partition type %zd.\n", type); + exit(-1); + } + + if (buffer_size(&ifwi_image.subpart_buf[type])) { + ERROR("Multiple sub-partitions of type %zd(%s).\n", + type, subparts[type].name); + exit(-1); + } + + if (e[i].size == 0) { + INFO("Dummy sub-partition %zd(%s). Skipping.\n", type, + subparts[type].name); + continue; + } + + assert((e[i].offset + e[i].size) <= size); + + /* + * Sub-partitions in IFWI image are not in the same order as + * in BPDT entries. BPDT entires are in header_order whereas + * sub-partition offsets in the image are in pack_order. + */ + if ((e[i].offset + e[i].size) > max_offset) + max_offset = e[i].offset + e[i].size; + + /* + * S-BPDT sub-partition contains information about all the + * non-critical sub-partitions. Thus, size of S-BPDT + * sub-partition equals size of S-BPDT plus size of all the + * non-critical sub-partitions. Thus, reading whole of S-BPDT + * here would be redundant as the non-critical partitions are + * read and allocated buffers separately. Also, S-BPDT requires + * special handling for reading header and entries. + */ + if (type == S_BPDT_TYPE) + continue; + + buf = &ifwi_image.subpart_buf[type]; + + alloc_buffer(buf, e[i].size, subparts[type].name); + memcpy(buffer_get(buf), (uint8_t *)data + e[i].offset, + e[i].size); + } + + assert(max_offset); + return max_offset; +} + +/* + * Allocate buffer for bpdt header, entries and all sub-partition content. + * Returns offset in data where BPDT ends. + */ +static size_t alloc_bpdt_buffer(void *data, size_t size, size_t offset, + struct buffer *b, const char *name) +{ + struct bpdt_header bpdt_header; + assert((offset + BPDT_HEADER_SIZE) < size); + bpdt_read_header((uint8_t *)data + offset, &bpdt_header, name); + + /* Buffer to read BPDT header and entries. */ + alloc_buffer(b, bpdt_size(&bpdt_header), name); + + struct bpdt *bpdt = buffer_get(b); + memcpy(&bpdt->h, &bpdt_header, BPDT_HEADER_SIZE); + + /* + * If no entries are present, maximum offset occupied is (offset + + * BPDT_HEADER_SIZE). + */ + if (bpdt->h.descriptor_count == 0) + return (offset + BPDT_HEADER_SIZE); + + /* Read all entries. */ + assert((offset + bpdt_size(&bpdt->h)) < size); + bpdt_read_entries((uint8_t *)data + offset + BPDT_HEADER_SIZE, bpdt, + name); + + /* Read all sub-partition content in subpart_buf. */ + return read_subpart_buf(data, size, &bpdt->e[0], + bpdt->h.descriptor_count); +} + +static void parse_sbpdt(void *data, size_t size) +{ + struct bpdt_entry *s; + s = find_entry_by_type(S_BPDT_TYPE); + if (!s) + return; + + assert(size > s->offset); + + alloc_bpdt_buffer(data, size, s->offset, + &ifwi_image.subpart_buf[S_BPDT_TYPE], + "S-BPDT"); +} + +static uint8_t calc_checksum(struct subpart_dir *s) +{ + size_t size = subpart_dir_size(&s->h); + uint8_t *data = (uint8_t *)s; + uint8_t checksum = 0; + size_t i; + + uint8_t old_checksum = s->h.checksum; + s->h.checksum = 0; + + for (i = 0; i < size; i++) { + checksum ^= data[i]; + } + + s->h.checksum = old_checksum; + return checksum; +} + +static void validate_subpart_dir(struct subpart_dir *s, const char *name, + bool checksum_check) +{ + if ((s->h.marker != SUBPART_DIR_MARKER) || + (s->h.header_version != SUBPART_DIR_HEADER_VERSION_SUPPORTED) || + (s->h.entry_version != SUBPART_DIR_ENTRY_VERSION_SUPPORTED) || + (s->h.header_length != SUBPART_DIR_HEADER_SIZE)) { + ERROR("Invalid subpart_dir for %s.\n", name); + exit(-1); + } + + if (checksum_check == 0) + return; + + uint8_t checksum = calc_checksum(s); + + if (checksum != s->h.checksum) + ERROR("Invalid checksum for %s(Expected=0x%x,Current=0x%x).\n", + name, checksum, s->h.checksum); +} + +static void validate_subpart_dir_without_checksum(struct subpart_dir *s, + const char *name) +{ + validate_subpart_dir(s, name, 0); +} + +static void validate_subpart_dir_with_checksum(struct subpart_dir *s, + const char *name) +{ + validate_subpart_dir(s, name, 1); +} + +static void parse_subpart_dir(struct buffer *subpart_dir_buf, + struct buffer *input_buf, const char *name) +{ + struct subpart_dir_header hdr; + size_t offset = 0; + uint8_t *data = buffer_get(input_buf); + size_t size = buffer_size(input_buf); + + /* Read Subpart_Dir header. */ + assert(size >= SUBPART_DIR_HEADER_SIZE); + offset = read_member(data, offset, sizeof(hdr.marker), &hdr.marker); + offset = read_member(data, offset, sizeof(hdr.num_entries), + &hdr.num_entries); + offset = read_member(data, offset, sizeof(hdr.header_version), + &hdr.header_version); + offset = read_member(data, offset, sizeof(hdr.entry_version), + &hdr.entry_version); + offset = read_member(data, offset, sizeof(hdr.header_length), + &hdr.header_length); + offset = read_member(data, offset, sizeof(hdr.checksum), &hdr.checksum); + memcpy(hdr.name, data + offset, sizeof(hdr.name)); + offset += sizeof(hdr.name); + + validate_subpart_dir_without_checksum((struct subpart_dir *)&hdr, name); + + assert(size > subpart_dir_size(&hdr)); + alloc_buffer(subpart_dir_buf, subpart_dir_size(&hdr), "Subpart Dir"); + memcpy(buffer_get(subpart_dir_buf), &hdr, SUBPART_DIR_HEADER_SIZE); + + /* Read Subpart Dir entries. */ + struct subpart_dir *subpart_dir = buffer_get(subpart_dir_buf); + struct subpart_dir_entry *e = &subpart_dir->e[0]; + uint32_t i; + for (i = 0; i < hdr.num_entries; i++) { + memcpy(e[i].name, data + offset, sizeof(e[i].name)); + offset += sizeof(e[i].name); + offset = read_member(data, offset, sizeof(e[i].offset), + &e[i].offset); + offset = read_member(data, offset, sizeof(e[i].length), + &e[i].length); + offset = read_member(data, offset, sizeof(e[i].rsvd), + &e[i].rsvd); + } + + validate_subpart_dir_with_checksum(subpart_dir, name); + + print_subpart_dir(subpart_dir); +} + +/* Parse input image file to identify different sub-partitions. */ +static int ifwi_parse(void) +{ + DEBUG("Parsing IFWI image...\n"); + const char *image_name = param.image_name; + + /* Read input file. */ + struct buffer *buff = &ifwi_image.input_buff; + if (buffer_from_file(buff, image_name)) { + ERROR("Failed to read input file %s.\n", image_name); + return -1; + } + + INFO("Buffer %p size 0x%zx\n", buff->data, buff->size); + + /* Look for BPDT signature at 4K intervals. */ + size_t offset = 0; + void *data = buffer_get(buff); + + while (offset < buffer_size(buff)) { + if (read_at_le32(data, offset) == BPDT_SIGNATURE) + break; + offset += 4 * KiB; + } + + if (offset >= buffer_size(buff)) { + ERROR("Image does not contain BPDT!!\n"); + return -1; + } + + ifwi_image.input_ifwi_start_offset = offset; + INFO("BPDT starts at offset 0x%zx.\n", offset); + + data = (uint8_t *)data + offset; + size_t ifwi_size = buffer_size(buff) - offset; + + /* Read BPDT and sub-partitions. */ + uintptr_t end_offset; + end_offset = ifwi_image.input_ifwi_start_offset + + alloc_bpdt_buffer(data, ifwi_size, 0, &ifwi_image.bpdt, "BPDT"); + + /* Parse S-BPDT, if any. */ + parse_sbpdt(data, ifwi_size); + + /* + * Store end offset of IFWI. Required for copying any trailing non-IFWI + * part of the image. + * ASSUMPTION: IFWI image always ends on a 4K boundary. + */ + ifwi_image.input_ifwi_end_offset = ALIGN(end_offset, 4 * KiB); + DEBUG("Parsing done.\n"); + + return 0; +} + +/* + * This function is used by repack to count the number of BPDT and S-BPDT + * entries that are present. It frees the current buffers used by the entries + * and allocates fresh buffers that can be used for repacking. Returns BPDT + * entries which are empty and need to be filled in. + */ +static void __bpdt_reset(struct buffer *b, size_t count, size_t size) +{ + size_t bpdt_size = BPDT_HEADER_SIZE + count * BPDT_ENTRY_SIZE; + assert(size >= bpdt_size); + + /* + * If buffer does not have the required size, allocate a fresh buffer. + */ + if (buffer_size(b) != size) { + struct buffer temp; + alloc_buffer(&temp, size, b->name); + memcpy(buffer_get(&temp), buffer_get(b), buffer_size(b)); + buffer_delete(b); + *b = temp; + } + + struct bpdt *bpdt = buffer_get(b); + uint8_t *ptr = (uint8_t *)&bpdt->e[0]; + size_t entries_size = BPDT_ENTRY_SIZE * count; + + /* Zero out BPDT entries. */ + memset(ptr, 0, entries_size); + /* Fill any pad-space with FF. */ + memset(ptr + entries_size, 0xFF, size - bpdt_size); + + bpdt->h.descriptor_count = count; +} + +static void bpdt_reset(void) +{ + size_t i; + size_t bpdt_count = 0, sbpdt_count = 0, dummy_bpdt_count = 0; + + /* Count number of BPDT and S-BPDT entries. */ + for (i = 0; i < MAX_SUBPARTS; i++) { + if (buffer_size(&ifwi_image.subpart_buf[i]) == 0) { + if (subparts[i].attr & MANDATORY_BPDT_ENTRY) { + bpdt_count++; + dummy_bpdt_count++; + } + continue; + } + + if (subparts[i].attr & NON_CRITICAL_SUBPART) + sbpdt_count++; + else + bpdt_count++; + } + + DEBUG("Count: BPDT = %zd, Dummy BPDT = %zd, S-BPDT = %zd\n", bpdt_count, + dummy_bpdt_count, sbpdt_count); + + /* Update BPDT if required. */ + size_t bpdt_size = MAX(BPDT_MIN_SIZE, + BPDT_HEADER_SIZE + bpdt_count * BPDT_ENTRY_SIZE); + __bpdt_reset(&ifwi_image.bpdt, bpdt_count, bpdt_size); + + /* Update S-BPDT if required. */ + bpdt_size = ALIGN(BPDT_HEADER_SIZE + sbpdt_count * BPDT_ENTRY_SIZE, + 4 * KiB); + __bpdt_reset(&ifwi_image.subpart_buf[S_BPDT_TYPE], sbpdt_count, + bpdt_size); +} + +/* Initialize BPDT entries in header order. */ +static void bpdt_entries_init_header_order(void) +{ + int i, type; + size_t size; + + struct bpdt *bpdt, *sbpdt, *curr; + size_t bpdt_curr = 0, sbpdt_curr = 0, *count_ptr; + + bpdt = buffer_get(&ifwi_image.bpdt); + sbpdt = buffer_get(&ifwi_image.subpart_buf[S_BPDT_TYPE]); + + for (i = 0; i < MAX_SUBPARTS; i++) { + type = bpdt_header_order[i]; + size = buffer_size(&ifwi_image.subpart_buf[type]); + + if ((size == 0) && !(subparts[type].attr & + MANDATORY_BPDT_ENTRY)) + continue; + + if (subparts[type].attr & NON_CRITICAL_SUBPART) { + curr = sbpdt; + count_ptr = &sbpdt_curr; + } else { + curr = bpdt; + count_ptr = &bpdt_curr; + } + + assert(*count_ptr < curr->h.descriptor_count); + curr->e[*count_ptr].type = type; + curr->e[*count_ptr].flags = 0; + curr->e[*count_ptr].offset = 0; + curr->e[*count_ptr].size = size; + + (*count_ptr)++; + } +} + +static void pad_buffer(struct buffer *b, size_t size) +{ + size_t buff_size = buffer_size(b); + + assert(buff_size <= size); + + if (buff_size == size) + return; + + struct buffer temp; + alloc_buffer(&temp, size, b->name); + uint8_t *data = buffer_get(&temp); + + memcpy(data, buffer_get(b), buff_size); + memset(data + buff_size, 0xFF, size - buff_size); + + *b = temp; +} + +/* Initialize offsets of entries using pack order. */ +static void bpdt_entries_init_pack_order(void) +{ + int i, type; + struct bpdt_entry *curr; + size_t curr_offset, curr_end; + + curr_offset = MAX(BPDT_MIN_SIZE, buffer_size(&ifwi_image.bpdt)); + + /* + * There are two types of sub-partitions that need to be handled here: + * 1. Sub-partitions that lie within the same 4K as BPDT + * 2. Sub-partitions that lie outside the 4K of BPDT + * + * For sub-partitions of type # 1, there is no requirement on the start + * or end of the sub-partition. They need to be packed in without any + * holes left in between. If there is any empty space left after the end + * of the last sub-partition in 4K of BPDT, then that space needs to be + * padded with FF bytes, but the size of the last sub-partition remains + * unchanged. + * + * For sub-partitions of type # 2, both the start and end should be a + * multiple of 4K. If not, then it needs to be padded with FF bytes and + * size adjusted such that the sub-partition ends on 4K boundary. + */ + + /* #1 Sub-partitions that lie within same 4K as BPDT. */ + struct buffer *last_bpdt_buff = &ifwi_image.bpdt; + + for (i = 0; i < MAX_SUBPARTS; i++) { + type = bpdt_pack_order[i]; + curr = find_entry_by_type(type); + + if ((curr == NULL) || (curr->size == 0)) + continue; + + if (!(subparts[type].attr & LIES_WITHIN_BPDT_4K)) + continue; + + curr->offset = curr_offset; + curr_offset = curr->offset + curr->size; + last_bpdt_buff = &ifwi_image.subpart_buf[type]; + DEBUG("type=%d, curr_offset=0x%zx, curr->offset=0x%x, " + "curr->size=0x%x, buff_size=0x%zx\n", type, curr_offset, + curr->offset, curr->size, + buffer_size(&ifwi_image.subpart_buf[type])); + } + + /* Pad ff bytes if there is any empty space left in BPDT 4K. */ + curr_end = ALIGN(curr_offset, 4 * KiB); + pad_buffer(last_bpdt_buff, + buffer_size(last_bpdt_buff) + (curr_end - curr_offset)); + curr_offset = curr_end; + + /* #2 Sub-partitions that lie outside of BPDT 4K. */ + for (i = 0; i < MAX_SUBPARTS; i++) { + type = bpdt_pack_order[i]; + curr = find_entry_by_type(type); + + if ((curr == NULL) || (curr->size == 0)) + continue; + + if (subparts[type].attr & LIES_WITHIN_BPDT_4K) + continue; + + assert(curr_offset == ALIGN(curr_offset, 4 * KiB)); + curr->offset = curr_offset; + curr_end = ALIGN(curr->offset + curr->size, 4 * KiB); + curr->size = curr_end - curr->offset; + + pad_buffer(&ifwi_image.subpart_buf[type], curr->size); + + curr_offset = curr_end; + DEBUG("type=%d, curr_offset=0x%zx, curr->offset=0x%x, " + "curr->size=0x%x, buff_size=0x%zx\n", type, curr_offset, + curr->offset, curr->size, + buffer_size(&ifwi_image.subpart_buf[type])); + } + + /* + * Update size of S-BPDT to include size of all non-critical + * sub-partitions. + * + * Assumption: S-BPDT always lies at the end of IFWI image. + */ + curr = find_entry_by_type(S_BPDT_TYPE); + assert(curr); + + assert(curr_offset == ALIGN(curr_offset, 4 * KiB)); + curr->size = curr_offset - curr->offset; +} + +/* Convert all members of BPDT to little-endian format. */ +static void bpdt_fixup_write_buffer(struct buffer *buf) +{ + struct bpdt *s = buffer_get(buf); + + struct bpdt_header *h = &s->h; + struct bpdt_entry *e = &s->e[0]; + + size_t count = h->descriptor_count; + + size_t offset = 0; + + offset = fix_member(&h->signature, offset, sizeof(h->signature)); + offset = fix_member(&h->descriptor_count, offset, + sizeof(h->descriptor_count)); + offset = fix_member(&h->bpdt_version, offset, sizeof(h->bpdt_version)); + offset = fix_member(&h->xor_redundant_block, offset, + sizeof(h->xor_redundant_block)); + offset = fix_member(&h->ifwi_version, offset, sizeof(h->ifwi_version)); + offset = fix_member(&h->fit_tool_version, offset, + sizeof(h->fit_tool_version)); + + uint32_t i; + for (i = 0; i < count; i++) { + offset = fix_member(&e[i].type, offset, sizeof(e[i].type)); + offset = fix_member(&e[i].flags, offset, sizeof(e[i].flags)); + offset = fix_member(&e[i].offset, offset, sizeof(e[i].offset)); + offset = fix_member(&e[i].size, offset, sizeof(e[i].size)); + } +} + +/* Write BPDT to output buffer after fixup. */ +static void bpdt_write(struct buffer *dst, size_t offset, struct buffer *src) +{ + bpdt_fixup_write_buffer(src); + memcpy(buffer_get(dst) + offset, buffer_get(src), buffer_size(src)); +} + +/* + * Follows these steps to re-create image: + * 1. Write any non-IFWI prefix. + * 2. Write out BPDT header and entries. + * 3. Write sub-partition buffers to respective offsets. + * 4. Write any non-IFWI suffix. + * + * While performing the above steps, make sure that any empty holes are filled + * with FF. + */ +static void ifwi_write(const char *image_name) +{ + struct bpdt_entry *s = find_entry_by_type(S_BPDT_TYPE); + assert(s); + + size_t ifwi_start, ifwi_end, file_end; + + ifwi_start = ifwi_image.input_ifwi_start_offset; + ifwi_end = ifwi_start + ALIGN(s->offset + s->size, 4 * KiB); + file_end = ifwi_end + (buffer_size(&ifwi_image.input_buff) - + ifwi_image.input_ifwi_end_offset); + + struct buffer b; + + alloc_buffer(&b, file_end, "Final-IFWI"); + + uint8_t *input_data = buffer_get(&ifwi_image.input_buff); + uint8_t *output_data = buffer_get(&b); + + DEBUG("ifwi_start:0x%zx, ifwi_end:0x%zx, file_end:0x%zx\n", ifwi_start, + ifwi_end, file_end); + + /* Copy non-IFWI prefix, if any. */ + memcpy(output_data, input_data, ifwi_start); + + DEBUG("Copied non-IFWI prefix (offset=0x0, size=0x%zx).\n", ifwi_start); + + struct buffer ifwi; + buffer_splice(&ifwi, &b, ifwi_start, ifwi_end - ifwi_start); + uint8_t *ifwi_data = buffer_get(&ifwi); + + /* Copy sub-partitions using pack_order. */ + struct bpdt_entry *curr; + struct buffer *subpart_buf; + int i, type; + for (i = 0; i < MAX_SUBPARTS; i++) { + type = bpdt_pack_order[i]; + + if (type == S_BPDT_TYPE) + continue; + + curr = find_entry_by_type(type); + + if ((curr == NULL) || (curr->size == 0)) + continue; + + subpart_buf = &ifwi_image.subpart_buf[type]; + + DEBUG("curr->offset=0x%x, curr->size=0x%x, type=%d, " + "write_size=0x%zx\n", curr->offset, curr->size, type, + buffer_size(subpart_buf)); + + assert((curr->offset + buffer_size(subpart_buf)) <= + buffer_size(&ifwi)); + + memcpy(ifwi_data + curr->offset, buffer_get(subpart_buf), + buffer_size(subpart_buf)); + } + + /* Copy non-IFWI suffix, if any. */ + if (ifwi_end != file_end) { + memcpy(output_data + ifwi_end, + input_data + ifwi_image.input_ifwi_end_offset, + file_end - ifwi_end); + DEBUG("Copied non-IFWI suffix (offset=0x%zx,size=0x%zx).\n", + ifwi_end, file_end - ifwi_end); + } + + /* + * Convert BPDT to little-endian format and write it to output buffer. + * S-BPDT is written first and then BPDT. + */ + bpdt_write(&ifwi, s->offset, &ifwi_image.subpart_buf[S_BPDT_TYPE]); + bpdt_write(&ifwi, 0, &ifwi_image.bpdt); + + if (buffer_write_file(&b, image_name)) { + ERROR("File write error\n"); + exit(-1); + } + + buffer_delete(&b); + printf("Image written successfully to %s.\n", image_name); +} + +/* + * Calculate size and offset of each sub-partition again since it might have + * changed because of add/delete operation. Also, re-create BPDT and S-BPDT + * entries and write back the new IFWI image to file. + */ +static void ifwi_repack(void) +{ + bpdt_reset(); + bpdt_entries_init_header_order(); + bpdt_entries_init_pack_order(); + + struct bpdt *b = buffer_get(&ifwi_image.bpdt); + bpdt_print_entries(&b->e[0], b->h.descriptor_count, "BPDT"); + + b = buffer_get(&ifwi_image.subpart_buf[S_BPDT_TYPE]); + bpdt_print_entries(&b->e[0], b->h.descriptor_count, "S-BPDT"); + + DEBUG("Repack done.. writing image.\n"); + ifwi_write(param.image_name); +} + +static void init_subpart_dir_header(struct subpart_dir_header *hdr, + size_t count, const char *name) +{ + memset(hdr, 0, sizeof(*hdr)); + + hdr->marker = SUBPART_DIR_MARKER; + hdr->num_entries = count; + hdr->header_version = SUBPART_DIR_HEADER_VERSION_SUPPORTED; + hdr->entry_version = SUBPART_DIR_ENTRY_VERSION_SUPPORTED; + hdr->header_length = SUBPART_DIR_HEADER_SIZE; + memcpy(hdr->name, name, sizeof(hdr->name)); +} + +static size_t init_subpart_dir_entry(struct subpart_dir_entry *e, + struct buffer *b, size_t offset) +{ + memset(e, 0, sizeof(*e)); + + assert(strlen(b->name) <= sizeof(e->name)); + strncpy((char *)e->name, (char *)b->name, sizeof(e->name)); + e->offset = offset; + e->length = buffer_size(b); + + return (offset + buffer_size(b)); +} + +static void init_manifest_header(struct manifest_header *hdr, size_t size) +{ + memset(hdr, 0, sizeof(*hdr)); + + hdr->header_type = 0x4; + assert((MANIFEST_HDR_SIZE % DWORD_SIZE) == 0); + hdr->header_length = MANIFEST_HDR_SIZE / DWORD_SIZE; + hdr->header_version = 0x10000; + hdr->vendor = 0x8086; + + struct tm *local_time; + time_t curr_time; + char buffer[11]; + + curr_time = time(NULL); + local_time = localtime(&curr_time); + strftime(buffer, sizeof(buffer), "0x%Y%m%d", local_time); + hdr->date = strtoul(buffer, NULL, 16); + + assert((size % DWORD_SIZE) == 0); + hdr->size = size / DWORD_SIZE; + hdr->id = MANIFEST_ID_MAGIC; +} + +static void init_signed_pkg_info_ext(struct signed_pkg_info_ext *ext, + size_t count, const char *name) +{ + memset(ext, 0, sizeof(*ext)); + + ext->ext_type = SIGNED_PKG_INFO_EXT_TYPE; + ext->ext_length = SIGNED_PKG_INFO_EXT_SIZE + count * MODULE_SIZE; + memcpy(ext->name, name, sizeof(ext->name)); +} + +static void subpart_dir_fixup_write_buffer(struct buffer *buf) +{ + struct subpart_dir *s = buffer_get(buf); + struct subpart_dir_header *h = &s->h; + struct subpart_dir_entry *e = &s->e[0]; + + size_t count = h->num_entries; + size_t offset = 0; + + offset = fix_member(&h->marker, offset, sizeof(h->marker)); + offset = fix_member(&h->num_entries, offset, sizeof(h->num_entries)); + offset = fix_member(&h->header_version, offset, + sizeof(h->header_version)); + offset = fix_member(&h->entry_version, offset, + sizeof(h->entry_version)); + offset = fix_member(&h->header_length, offset, + sizeof(h->header_length)); + offset = fix_member(&h->checksum, offset, sizeof(h->checksum)); + offset += sizeof(h->name); + + uint32_t i; + for (i = 0; i < count; i++) { + offset += sizeof(e[i].name); + offset = fix_member(&e[i].offset, offset, sizeof(e[i].offset)); + offset = fix_member(&e[i].length, offset, sizeof(e[i].length)); + offset = fix_member(&e[i].rsvd, offset, sizeof(e[i].rsvd)); + } +} + +static void create_subpart(struct buffer *dst, struct buffer *info[], + size_t count, const char *name) +{ + struct buffer subpart_dir_buff; + size_t size = SUBPART_DIR_HEADER_SIZE + count * SUBPART_DIR_ENTRY_SIZE; + + alloc_buffer(&subpart_dir_buff, size, "subpart-dir"); + + struct subpart_dir_header *h = buffer_get(&subpart_dir_buff); + struct subpart_dir_entry *e = (struct subpart_dir_entry *)(h + 1); + + init_subpart_dir_header(h, count, name); + + size_t curr_offset = size; + size_t i; + + for (i = 0; i < count; i++) { + curr_offset = init_subpart_dir_entry(&e[i], info[i], + curr_offset); + } + + alloc_buffer(dst, curr_offset, name); + uint8_t *data = buffer_get(dst); + + for (i = 0; i < count; i++) { + memcpy(data + e[i].offset, buffer_get(info[i]), + buffer_size(info[i])); + } + + h->checksum = calc_checksum(buffer_get(&subpart_dir_buff)); + + struct subpart_dir *dir = buffer_get(&subpart_dir_buff); + + print_subpart_dir(dir); + + subpart_dir_fixup_write_buffer(&subpart_dir_buff); + memcpy(data, dir, buffer_size(&subpart_dir_buff)); + + buffer_delete(&subpart_dir_buff); +} + +static enum ifwi_ret ibbp_dir_add(int type) +{ +#define DUMMY_IBB_SIZE (4 * KiB) + + assert (type == IBB_TYPE); + + /* + * Entry # 1 - IBBP.man + * Contains manifest header and signed pkg info extension. + */ + struct buffer manifest; + size_t size = MANIFEST_HDR_SIZE + SIGNED_PKG_INFO_EXT_SIZE; + alloc_buffer(&manifest, size, "IBBP.man"); + + struct manifest_header *man_hdr = buffer_get(&manifest); + init_manifest_header(man_hdr, size); + + struct signed_pkg_info_ext *ext; + ext = (struct signed_pkg_info_ext *)(man_hdr + 1); + + init_signed_pkg_info_ext(ext, 0, subparts[type].name); + + /* Entry # 2 - IBBL */ + struct buffer ibbl; + if (buffer_from_file(&ibbl, param.file_name)) + return COMMAND_ERR; + + /* Entry # 3 - IBB */ + struct buffer ibb; + alloc_buffer(&ibb, DUMMY_IBB_SIZE, "IBB"); + memset(buffer_get(&ibb), 0xFF, DUMMY_IBB_SIZE); + + /* Create subpartition. */ + struct buffer *info[] = { + &manifest, &ibbl, &ibb, + }; + create_subpart(&ifwi_image.subpart_buf[type], &info[0], + ARRAY_SIZE(info), subparts[type].name); + + return REPACK_REQUIRED; +} + +static enum ifwi_ret ifwi_raw_add(int type) +{ + if (buffer_from_file(&ifwi_image.subpart_buf[type], param.file_name)) + return COMMAND_ERR; + + printf("Sub-partition %s(%d) added from file %s.\n", param.subpart_name, + type, param.file_name); + return REPACK_REQUIRED; +} + +static enum ifwi_ret ifwi_dir_add(int type) +{ + if (!(subparts[type].attr & CONTAINS_DIR) || + (subparts[type].dir_ops.dir_add == NULL)) { + ERROR("Sub-Partition %s(%d) does not support dir ops.\n", + subparts[type].name, type); + return COMMAND_ERR; + } + + if (!param.dentry_name) { + ERROR("%s: -e option required\n", __func__); + return COMMAND_ERR; + } + + enum ifwi_ret ret = subparts[type].dir_ops.dir_add(type); + if (ret != COMMAND_ERR) + printf("Sub-partition %s(%d) entry %s added from file %s.\n", + param.subpart_name, type, param.dentry_name, + param.file_name); + else + ERROR("Sub-partition dir operation failed.\n"); + + return ret; +} + +static enum ifwi_ret ifwi_add(void) +{ + if (!param.file_name) { + ERROR("%s: -f option required\n", __func__); + return COMMAND_ERR; + } + + if (!param.subpart_name) { + ERROR("%s: -n option required\n", __func__); + return COMMAND_ERR; + } + + int type = find_type_by_name(param.subpart_name); + if (type == -1) + return COMMAND_ERR; + + const struct subpart_info *curr_subpart = &subparts[type]; + + if (curr_subpart->attr & AUTO_GENERATED) { + ERROR("Cannot add auto-generated sub-partitions.\n"); + return COMMAND_ERR; + } + + if (buffer_size(&ifwi_image.subpart_buf[type])) { + ERROR("Image already contains sub-partition %s(%d).\n", + param.subpart_name, type); + return COMMAND_ERR; + } + + if (param.dir_ops) + return ifwi_dir_add(type); + + return ifwi_raw_add(type); +} + +static enum ifwi_ret ifwi_delete(void) +{ + if (!param.subpart_name) { + ERROR("%s: -n option required\n", __func__); + return COMMAND_ERR; + } + + int type = find_type_by_name(param.subpart_name); + if (type == -1) + return COMMAND_ERR; + + const struct subpart_info *curr_subpart = &subparts[type]; + + if (curr_subpart->attr & AUTO_GENERATED) { + ERROR("Cannot delete auto-generated sub-partitions.\n"); + return COMMAND_ERR; + } + + if (buffer_size(&ifwi_image.subpart_buf[type]) == 0) { + printf("Image does not contain sub-partition %s(%d).\n", + param.subpart_name, type); + return NO_ACTION_REQUIRED; + } + + buffer_delete(&ifwi_image.subpart_buf[type]); + printf("Sub-Partition %s(%d) deleted.\n", subparts[type].name, type); + return REPACK_REQUIRED; +} + +static enum ifwi_ret ifwi_dir_extract(int type) +{ + if (!(subparts[type].attr & CONTAINS_DIR)) { + ERROR("Sub-Partition %s(%d) does not support dir ops.\n", + subparts[type].name, type); + return COMMAND_ERR; + } + + if (!param.dentry_name) { + ERROR("%s: -e option required.\n", __func__); + return COMMAND_ERR; + } + + struct buffer subpart_dir_buff; + parse_subpart_dir(&subpart_dir_buff, &ifwi_image.subpart_buf[type], + subparts[type].name); + + uint32_t i; + struct subpart_dir *s = buffer_get(&subpart_dir_buff); + + for (i = 0; i < s->h.num_entries; i++) { + if (!strncmp((char *)s->e[i].name, param.dentry_name, + sizeof(s->e[i].name))) + break; + } + + if (i == s->h.num_entries) { + ERROR("Entry %s not found in subpartition for %s.\n", + param.dentry_name, param.subpart_name); + exit(-1); + } + + struct buffer dst; + + DEBUG("Splicing buffer at 0x%x size 0x%x\n", s->e[i].offset, + s->e[i].length); + buffer_splice(&dst, &ifwi_image.subpart_buf[type], s->e[i].offset, + s->e[i].length); + + if (buffer_write_file(&dst, param.file_name)) + return COMMAND_ERR; + + printf("Sub-Partition %s(%d), entry(%s) stored in %s.\n", + param.subpart_name, type, param.dentry_name, param.file_name); + + return NO_ACTION_REQUIRED; +} + +static enum ifwi_ret ifwi_raw_extract(int type) +{ + if (buffer_write_file(&ifwi_image.subpart_buf[type], param.file_name)) + return COMMAND_ERR; + + printf("Sub-Partition %s(%d) stored in %s.\n", param.subpart_name, type, + param.file_name); + + return NO_ACTION_REQUIRED; +} + +static enum ifwi_ret ifwi_extract(void) +{ + if (!param.file_name) { + ERROR("%s: -f option required\n", __func__); + return COMMAND_ERR; + } + + if (!param.subpart_name) { + ERROR("%s: -n option required\n", __func__); + return COMMAND_ERR; + } + + int type = find_type_by_name(param.subpart_name); + if (type == -1) + return COMMAND_ERR; + + if (type == S_BPDT_TYPE) { + INFO("Tool does not support raw extract for %s\n", + param.subpart_name); + return NO_ACTION_REQUIRED; + } + + if (buffer_size(&ifwi_image.subpart_buf[type]) == 0) { + ERROR("Image does not contain sub-partition %s(%d).\n", + param.subpart_name, type); + return COMMAND_ERR; + } + + INFO("Extracting sub-partition %s(%d).\n", param.subpart_name, type); + if (param.dir_ops) + return ifwi_dir_extract(type); + + return ifwi_raw_extract(type); +} + +static enum ifwi_ret ifwi_print(void) +{ + verbose += 2; + + struct bpdt *b = buffer_get(&ifwi_image.bpdt); + + bpdt_print_header(&b->h, "BPDT"); + bpdt_print_entries(&b->e[0], b->h.descriptor_count, "BPDT"); + + b = buffer_get(&ifwi_image.subpart_buf[S_BPDT_TYPE]); + bpdt_print_header(&b->h, "S-BPDT"); + bpdt_print_entries(&b->e[0], b->h.descriptor_count, "S-BPDT"); + + if (param.dir_ops == 0) { + verbose -= 2; + return NO_ACTION_REQUIRED; + } + + int i; + struct buffer subpart_dir_buf; + for (i = 0; i < MAX_SUBPARTS ; i++) { + if (!(subparts[i].attr & CONTAINS_DIR) || + (buffer_size(&ifwi_image.subpart_buf[i]) == 0)) + continue; + + parse_subpart_dir(&subpart_dir_buf, &ifwi_image.subpart_buf[i], + subparts[i].name); + buffer_delete(&subpart_dir_buf); + } + + verbose -= 2; + + return NO_ACTION_REQUIRED; +} + +static enum ifwi_ret ifwi_raw_replace(int type) +{ + buffer_delete(&ifwi_image.subpart_buf[type]); + return ifwi_raw_add(type); +} + +static enum ifwi_ret ifwi_dir_replace(int type) +{ + if (!(subparts[type].attr & CONTAINS_DIR)) { + ERROR("Sub-Partition %s(%d) does not support dir ops.\n", + subparts[type].name, type); + return COMMAND_ERR; + } + + if (!param.dentry_name) { + ERROR("%s: -e option required.\n", __func__); + return COMMAND_ERR; + } + + struct buffer subpart_dir_buf; + parse_subpart_dir(&subpart_dir_buf, &ifwi_image.subpart_buf[type], + subparts[type].name); + + uint32_t i; + struct subpart_dir *s = buffer_get(&subpart_dir_buf); + + for (i = 0; i < s->h.num_entries; i++) { + if (!strcmp((char *)s->e[i].name, param.dentry_name)) + break; + } + + if (i == s->h.num_entries) { + ERROR("Entry %s not found in subpartition for %s.\n", + param.dentry_name, param.subpart_name); + exit(-1); + } + + struct buffer b; + if (buffer_from_file(&b, param.file_name)) { + ERROR("Failed to read %s\n", param.file_name); + exit(-1); + } + + struct buffer dst; + size_t dst_size = buffer_size(&ifwi_image.subpart_buf[type] + + buffer_size(&b) - s->e[i].length); + size_t subpart_start = s->e[i].offset; + size_t subpart_end = s->e[i].offset + s->e[i].length; + + alloc_buffer(&dst, dst_size, ifwi_image.subpart_buf[type].name); + + uint8_t *src_data = buffer_get(&ifwi_image.subpart_buf[type]); + uint8_t *dst_data = buffer_get(&dst); + size_t curr_offset = 0; + + /* Copy data before the sub-partition entry. */ + memcpy(dst_data + curr_offset, src_data, subpart_start); + curr_offset += subpart_start; + + /* Copy sub-partition entry. */ + memcpy(dst_data + curr_offset, buffer_get(&b), buffer_size(&b)); + curr_offset += buffer_size(&b); + + /* Copy remaining data. */ + memcpy(dst_data + curr_offset, src_data + subpart_end, + buffer_size(&ifwi_image.subpart_buf[type]) - subpart_end); + + /* Update sub-partition buffer. */ + int offset = s->e[i].offset; + buffer_delete(&ifwi_image.subpart_buf[type]); + ifwi_image.subpart_buf[type] = dst; + + /* Update length of entry in the subpartition. */ + s->e[i].length = buffer_size(&b); + buffer_delete(&b); + + /* Adjust offsets of affected entries in subpartition. */ + offset = s->e[i].offset - offset; + for (; i < s->h.num_entries; i++) { + s->e[i].offset += offset; + } + + /* Re-calculate checksum. */ + s->h.checksum = calc_checksum(s); + + /* Convert members to litte-endian. */ + subpart_dir_fixup_write_buffer(&subpart_dir_buf); + + memcpy(dst_data, buffer_get(&subpart_dir_buf), + buffer_size(&subpart_dir_buf)); + + buffer_delete(&subpart_dir_buf); + + printf("Sub-partition %s(%d) entry %s replaced from file %s.\n", + param.subpart_name, type, param.dentry_name, param.file_name); + + return REPACK_REQUIRED; +} + +static enum ifwi_ret ifwi_replace(void) +{ + if (!param.file_name) { + ERROR("%s: -f option required\n", __func__); + return COMMAND_ERR; + } + + if (!param.subpart_name) { + ERROR("%s: -n option required\n", __func__); + return COMMAND_ERR; + } + + int type = find_type_by_name(param.subpart_name); + if (type == -1) + return COMMAND_ERR; + + const struct subpart_info *curr_subpart = &subparts[type]; + + if (curr_subpart->attr & AUTO_GENERATED) { + ERROR("Cannot replace auto-generated sub-partitions.\n"); + return COMMAND_ERR; + } + + if (buffer_size(&ifwi_image.subpart_buf[type]) == 0) { + ERROR("Image does not contain sub-partition %s(%d).\n", + param.subpart_name, type); + return COMMAND_ERR; + } + + if (param.dir_ops) + return ifwi_dir_replace(type); + + return ifwi_raw_replace(type); +} + +static enum ifwi_ret ifwi_create(void) +{ + /* + * Create peels off any non-IFWI content present in the input buffer and + * creates output file with only the IFWI present. + */ + + if (!param.file_name) { + ERROR("%s: -f option required\n", __func__); + return COMMAND_ERR; + } + + /* Peel off any non-IFWI prefix. */ + buffer_seek(&ifwi_image.input_buff, + ifwi_image.input_ifwi_start_offset); + /* Peel off any non-IFWI suffix. */ + buffer_set_size(&ifwi_image.input_buff, + ifwi_image.input_ifwi_end_offset - + ifwi_image.input_ifwi_start_offset); + + /* + * Adjust start and end offset of IFWI now that non-IFWI prefix is gone. + */ + ifwi_image.input_ifwi_end_offset -= ifwi_image.input_ifwi_start_offset; + ifwi_image.input_ifwi_start_offset = 0; + + param.image_name = param.file_name; + + return REPACK_REQUIRED; +} + +struct command { + const char *name; + const char *optstring; + enum ifwi_ret (*function)(void); +}; + +static const struct command commands[] = { + {"add", "f:n:e:dvh?", ifwi_add}, + {"create", "f:vh?", ifwi_create}, + {"delete", "f:n:vh?", ifwi_delete}, + {"extract", "f:n:e:dvh?", ifwi_extract}, + {"print", "dh?", ifwi_print}, + {"replace", "f:n:e:dvh?", ifwi_replace}, +}; + +static struct option long_options[] = { + {"subpart_dentry", required_argument, 0, 'e'}, + {"file", required_argument, 0, 'f'}, + {"help", required_argument, 0, 'h'}, + {"name", required_argument, 0, 'n'}, + {"dir_ops", no_argument, 0, 'd'}, + {"verbose", no_argument, 0, 'v'}, + {NULL, 0, 0, 0 } +}; + +static void usage(const char *name) +{ + printf("ifwitool: Utility for IFWI manipulation\n\n" + "USAGE:\n" + " %s [-h]\n" + " %s FILE COMMAND [PARAMETERS]\n\n" + "COMMANDs:\n" + " add -f FILE -n NAME [-d -e ENTRY]\n" + " create -f FILE\n" + " delete -n NAME\n" + " extract -f FILE -n NAME [-d -e ENTRY]\n" + " print [-d]\n" + " replace -f FILE -n NAME [-d -e ENTRY]\n" + "OPTIONs:\n" + " -f FILE : File to read/write/create/extract\n" + " -d : Perform directory operation\n" + " -e ENTRY: Name of directory entry to operate on\n" + " -v : Verbose level\n" + " -h : Help message\n" + " -n NAME : Name of sub-partition to operate on\n", + name, name + ); + + printf("\nNAME should be one of:\n"); + int i; + for (i = 0; i < MAX_SUBPARTS; i++) + printf("%s(%s)\n", subparts[i].name, subparts[i].readable_name); + printf("\n"); +} + +int main(int argc, char **argv) +{ + if (argc < 3) { + usage(argv[0]); + return 1; + } + + param.image_name = argv[1]; + char *cmd = argv[2]; + optind += 2; + + uint32_t i; + + for (i = 0; i < ARRAY_SIZE(commands); i++) { + if (strcmp(cmd, commands[i].name) != 0) + continue; + + int c; + + while (1) { + int option_index; + + c = getopt_long(argc, argv, commands[i].optstring, + long_options, &option_index); + + if (c == -1) + break; + + /* Filter out illegal long options. */ + if (strchr(commands[i].optstring, c) == NULL) { + ERROR("%s: invalid option -- '%c'\n", argv[0], + c); + c = '?'; + } + + switch(c) { + case 'n': + param.subpart_name = optarg; + break; + case 'f': + param.file_name = optarg; + break; + case 'd': + param.dir_ops = 1; + break; + case 'e': + param.dentry_name = optarg; + break; + case 'v': + verbose++; + break; + case 'h': + case '?': + usage(argv[0]); + return 1; + default: + break; + } + } + + if (ifwi_parse()) { + ERROR("%s: ifwi parsing failed\n", argv[0]); + return 1; + } + + enum ifwi_ret ret = commands[i].function(); + + if (ret == COMMAND_ERR) { + ERROR("%s: failed execution\n", argv[0]); + return 1; + } + + if (ret == REPACK_REQUIRED) + ifwi_repack(); + + return 0; + } + + ERROR("%s: invalid command\n", argv[0]); + return 1; +}
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Furquan Shaikh