static struct dentry *find_file_in_archive(const struct directory *dir,
const char *name)
{
struct dentry *entry;
uintptr_t start;
int i;
if (!dir) {
printf("%s: archive not loaded\n", __func__);
return NULL;
}
/* calculate start of the file content section */
start = get_first_offset(dir);
entry = get_first_dentry(dir);
for (i = 0; i < dir->count; i++) {
if (strncmp(entry[i].name, name, NAME_LENGTH))
continue;
/* validate offset & size */
if (entry[i].offset < start
|| entry[i].offset + entry[i].size > dir->size
|| entry[i].offset > dir->size
|| entry[i].size > dir->size) {
printf("%s: '%s' has invalid offset or size\n",
__func__, name);
return NULL;
}
return &entry[i];
}
printf("%s: file '%s' not found\n", __func__, name);
return NULL;
}
/*
* Load archive into RAM
*/
static VbError_t load_archive(const char *name, struct directory **dest)
{
struct directory *dir;
struct dentry *entry;
size_t size;
int i;
printf("%s: loading %s\n", __func__, name);
*dest = NULL;
/* load archive from cbfs */
dir = cbfs_get_file_content(ro_cbfs, name, CBFS_TYPE_RAW, &size);
if (!dir || !size) {
printf("%s: failed to load %s\n", __func__, name);
return VBERROR_INVALID_BMPFV;
}
/* convert endianness of archive header */
dir->count = le32toh(dir->count);
dir->size = le32toh(dir->size);
/* validate the total size */
if (dir->size != size) {
printf("%s: archive size does not match\n", __func__);
return VBERROR_INVALID_BMPFV;
}
/* validate magic field */
if (memcmp(dir->magic, CBAR_MAGIC, sizeof(CBAR_MAGIC))) {
printf("%s: invalid archive magic\n", __func__);
return VBERROR_INVALID_BMPFV;
}
/* validate count field */
if (get_first_offset(dir) > dir->size) {
printf("%s: invalid count\n", __func__);
return VBERROR_INVALID_BMPFV;
}
/* convert endianness of file headers */
entry = get_first_dentry(dir);
for (i = 0; i < dir->count; i++) {
entry[i].offset = le32toh(entry[i].offset);
entry[i].size = le32toh(entry[i].size);
}
*dest = dir;
return VBERROR_SUCCESS;
}
/*
* Store files in archive
*/
static int archive_files(const char **files)
{
struct dentry *entry;
uint32_t offset;
int i;
entry = get_first_dentry(archive);
offset = get_first_offset(archive);
for (i = 0; i < archive->count; i++) {
if (add_file(files[i], entry, offset))
return -1;
offset += entry->size;
entry++;
}
return 0;
}
