flipperzero-firmware/lib/flipper_application/application_assets.c

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#include "application_assets.h"
#include <toolbox/path.h>
#include <storage/storage_i.h>
// #define ELF_ASSETS_DEBUG_LOG 1
#ifndef ELF_ASSETS_DEBUG_LOG
#undef FURI_LOG_D
#define FURI_LOG_D(...)
#undef FURI_LOG_E
#define FURI_LOG_E(...)
#endif
#define FLIPPER_APPLICATION_ASSETS_MAGIC 0x4F4C5A44
#define FLIPPER_APPLICATION_ASSETS_VERSION 1
#define FLIPPER_APPLICATION_ASSETS_SIGNATURE_FILENAME ".assets.signature"
#define BUFFER_SIZE 512
#define TAG "fap_assets"
#pragma pack(push, 1)
typedef struct {
uint32_t magic;
uint32_t version;
uint32_t dirs_count;
uint32_t files_count;
} FlipperApplicationAssetsHeader;
#pragma pack(pop)
typedef enum {
AssetsSignatureResultEqual,
AssetsSignatureResultNotEqual,
AssetsSignatureResultError,
} AssetsSignatureResult;
static FuriString* flipper_application_assets_alloc_app_full_path(FuriString* app_name) {
furi_assert(app_name);
FuriString* full_path = furi_string_alloc_set(APPS_ASSETS_PATH "/");
furi_string_cat(full_path, app_name);
return full_path;
}
static FuriString* flipper_application_assets_alloc_signature_file_path(FuriString* app_name) {
furi_assert(app_name);
FuriString* signature_file_path = flipper_application_assets_alloc_app_full_path(app_name);
furi_string_cat(signature_file_path, "/" FLIPPER_APPLICATION_ASSETS_SIGNATURE_FILENAME);
return signature_file_path;
}
static uint8_t* flipper_application_assets_alloc_and_load_data(File* file, size_t* size) {
furi_assert(file);
uint8_t* data = NULL;
uint32_t length = 0;
// read data length
if(storage_file_read(file, &length, sizeof(length)) != sizeof(length)) {
return NULL;
}
data = malloc(length);
// read data
if(storage_file_read(file, (void*)data, length) != length) {
free((void*)data);
return NULL;
}
if(size != NULL) {
*size = length;
}
return data;
}
static bool flipper_application_assets_process_files(
Storage* storage,
File* file,
FuriString* app_name,
uint32_t files_count) {
furi_assert(storage);
furi_assert(file);
furi_assert(app_name);
UNUSED(storage);
bool success = false;
uint32_t length = 0;
char* path = NULL;
FuriString* file_path = furi_string_alloc();
File* destination = storage_file_alloc(storage);
FuriString* full_path = flipper_application_assets_alloc_app_full_path(app_name);
for(uint32_t i = 0; i < files_count; i++) {
path = (char*)flipper_application_assets_alloc_and_load_data(file, NULL);
if(path == NULL) {
break;
}
// read file size
if(storage_file_read(file, &length, sizeof(length)) != sizeof(length)) {
break;
}
furi_string_set(file_path, full_path);
furi_string_cat(file_path, "/");
furi_string_cat(file_path, path);
if(!storage_file_open(
destination, furi_string_get_cstr(file_path), FSAM_WRITE, FSOM_CREATE_ALWAYS)) {
FURI_LOG_E(TAG, "Can't create file: %s", furi_string_get_cstr(file_path));
break;
}
// copy data to file
if(!storage_file_copy_to_file(file, destination, length)) {
FURI_LOG_E(TAG, "Can't copy data to file: %s", furi_string_get_cstr(file_path));
break;
}
storage_file_close(destination);
free(path);
path = NULL;
if(i == files_count - 1) {
success = true;
}
}
if(path != NULL) {
free(path);
}
storage_file_free(destination);
furi_string_free(file_path);
return success;
}
static bool flipper_application_assets_process_dirs(
Storage* storage,
File* file,
FuriString* app_name,
uint32_t dirs_count) {
furi_assert(storage);
furi_assert(file);
furi_assert(app_name);
bool success = false;
FuriString* full_path = flipper_application_assets_alloc_app_full_path(app_name);
do {
if(!storage_simply_mkdir(storage, APPS_ASSETS_PATH)) {
break;
}
if(!storage_simply_mkdir(storage, furi_string_get_cstr(full_path))) {
break;
}
FuriString* dir_path = furi_string_alloc();
char* path = NULL;
for(uint32_t i = 0; i < dirs_count; i++) {
path = (char*)flipper_application_assets_alloc_and_load_data(file, NULL);
if(path == NULL) {
break;
}
furi_string_set(dir_path, full_path);
furi_string_cat(dir_path, "/");
furi_string_cat(dir_path, path);
if(!storage_simply_mkdir(storage, furi_string_get_cstr(dir_path))) {
FURI_LOG_E(TAG, "Can't create directory: %s", furi_string_get_cstr(dir_path));
break;
}
free(path);
path = NULL;
if(i == dirs_count - 1) {
success = true;
}
}
if(path != NULL) {
free(path);
}
furi_string_free(dir_path);
} while(false);
furi_string_free(full_path);
return success;
}
static AssetsSignatureResult flipper_application_assets_process_signature(
Storage* storage,
File* file,
FuriString* app_name,
uint8_t** signature_data,
size_t* signature_data_size) {
furi_assert(storage);
furi_assert(file);
furi_assert(app_name);
furi_assert(signature_data);
furi_assert(signature_data_size);
AssetsSignatureResult result = AssetsSignatureResultError;
File* signature_file = storage_file_alloc(storage);
FuriString* signature_file_path =
flipper_application_assets_alloc_signature_file_path(app_name);
do {
// read signature
*signature_data =
flipper_application_assets_alloc_and_load_data(file, signature_data_size);
if(*signature_data == NULL) { //-V547
FURI_LOG_E(TAG, "Can't read signature");
break;
}
result = AssetsSignatureResultNotEqual;
if(!storage_file_open(
signature_file,
furi_string_get_cstr(signature_file_path),
FSAM_READ_WRITE,
FSOM_OPEN_EXISTING)) {
FURI_LOG_E(TAG, "Can't open signature file");
break;
}
size_t signature_size = storage_file_size(signature_file);
uint8_t* signature_file_data = malloc(signature_size);
if(storage_file_read(signature_file, signature_file_data, signature_size) !=
signature_size) {
FURI_LOG_E(TAG, "Can't read signature file");
free(signature_file_data);
break;
}
if(memcmp(*signature_data, signature_file_data, signature_size) == 0) {
FURI_LOG_D(TAG, "Assets signature is equal");
result = AssetsSignatureResultEqual;
}
free(signature_file_data);
} while(0);
storage_file_free(signature_file);
furi_string_free(signature_file_path);
return result;
}
bool flipper_application_assets_load(File* file, const char* elf_path, size_t offset, size_t size) {
UNUSED(size);
furi_assert(file);
furi_assert(elf_path);
FlipperApplicationAssetsHeader header;
bool result = false;
Storage* storage = furi_record_open(RECORD_STORAGE);
uint8_t* signature_data = NULL;
size_t signature_data_size = 0;
FuriString* app_name = furi_string_alloc();
path_extract_filename_no_ext(elf_path, app_name);
FURI_LOG_D(TAG, "Loading assets for %s", furi_string_get_cstr(app_name));
do {
if(!storage_file_seek(file, offset, true)) {
break;
}
// read header
if(storage_file_read(file, &header, sizeof(header)) != sizeof(header)) {
break;
}
if(header.magic != FLIPPER_APPLICATION_ASSETS_MAGIC) {
break;
}
if(header.version != FLIPPER_APPLICATION_ASSETS_VERSION) {
break;
}
// process signature
AssetsSignatureResult signature_result = flipper_application_assets_process_signature(
storage, file, app_name, &signature_data, &signature_data_size);
if(signature_result == AssetsSignatureResultError) {
FURI_LOG_E(TAG, "Assets signature error");
break;
} else if(signature_result == AssetsSignatureResultEqual) {
FURI_LOG_D(TAG, "Assets signature equal, skip loading");
result = true;
break;
} else {
FURI_LOG_D(TAG, "Assets signature not equal, loading");
// remove old assets
FuriString* full_path = flipper_application_assets_alloc_app_full_path(app_name);
storage_simply_remove_recursive(storage, furi_string_get_cstr(full_path));
furi_string_free(full_path);
FURI_LOG_D(TAG, "Assets removed");
}
// process directories
if(!flipper_application_assets_process_dirs(storage, file, app_name, header.dirs_count)) {
break;
}
// process files
if(!flipper_application_assets_process_files(storage, file, app_name, header.files_count)) {
break;
}
// write signature
FuriString* signature_file_path =
flipper_application_assets_alloc_signature_file_path(app_name);
File* signature_file = storage_file_alloc(storage);
if(storage_file_open(
signature_file,
furi_string_get_cstr(signature_file_path),
FSAM_WRITE,
FSOM_CREATE_ALWAYS)) {
storage_file_write(signature_file, signature_data, signature_data_size);
}
storage_file_free(signature_file);
furi_string_free(signature_file_path);
result = true;
} while(false);
if(signature_data != NULL) {
free(signature_data);
}
furi_record_close(RECORD_STORAGE);
furi_string_free(app_name);
FURI_LOG_D(TAG, "Assets loading %s", result ? "success" : "failed");
return result;
}