KumiSystems/openwrtv3
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

tools/firmware-utils: tplink-safeloader: fix support-list format, clean up vendor information

Browse source 
The first 4 bytes of the support list and the vendor information are
supposed to contain the length of these fields.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

SVN-Revision: 47211
This commit is contained in:
John Crispin 2015-10-19 10:08:44 +00:00
parent e9ed50829e
commit fea5d26c7f
1 changed files with 30 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

47
tools/firmware-utils/src/tplink-safeloader.c
View file

@ -103,7 +103,7 @@ static const uint8_t md5_salt[16] = {
/** Vendor information for CPE210/220/510/520 */
static const unsigned char cpe510_vendor[] = "\x00\x00\x00\x1f""CPE510(TP-LINK|UN|N300-5):1.0\r\n";
static const char cpe510_vendor[] = "CPE510(TP-LINK|UN|N300-5):1.0\r\n";
/**
@ -133,14 +133,13 @@ static const struct flash_partition_entry cpe510_partitions[] = {
The stock images also contain strings for two more devices: BS510 and BS210.
At the moment, there exists no public information about these devices.
*/
static const unsigned char cpe510_support_list[] =
"\x00\x00\x00\xc8\x00\x00\x00\x00"
static const char cpe510_support_list[] =
"SupportList:\r\n"
"CPE510(TP-LINK|UN|N300-5):1.0\r\n"
"CPE520(TP-LINK|UN|N300-5):1.0\r\n"
"CPE210(TP-LINK|UN|N300-2):1.0\r\n"
"CPE220(TP-LINK|UN|N300-2):1.0\r\n"
"\r\n\xff";
"\r\n";
#define error(_ret, _errno, _str, ...) \
do { \
@ -151,6 +150,14 @@ static const unsigned char cpe510_support_list[] =
} while (0)
/** Stores a uint32 as big endian */
static inline void put32(uint8_t *buf, uint32_t val) {
buf[0] = val >> 24;
buf[1] = val >> 16;
buf[2] = val >> 8;
buf[3] = val;
}
/** Allocates a new image partition */
static struct image_partition_entry alloc_image_partition(const char *name, size_t len) {
struct image_partition_entry entry = {name, len, malloc(len)};
@ -233,9 +240,15 @@ static struct image_partition_entry make_soft_version(uint32_t rev) {
}
/** Generates the support-list partition */
static struct image_partition_entry make_support_list(const unsigned char *support_list, size_t len) {
struct image_partition_entry entry = alloc_image_partition("support-list", len);
memcpy(entry.data, support_list, len);
static struct image_partition_entry make_support_list(const char *support_list) {
size_t len = strlen(support_list);
struct image_partition_entry entry = alloc_image_partition("support-list", len + 9);
put32(entry.data, len);
memset(entry.data+4, 0, 4);
memcpy(entry.data+8, support_list, len);
entry.data[len+8] = '\xff';
return entry;
}
@ -344,12 +357,13 @@ static void put_md5(uint8_t *md5, uint8_t *buffer, unsigned int len) {
----------- -----
0000-0003 Image size (4 bytes, big endian)
0004-0013 MD5 hash (hash of a 16 byte salt and the image data starting with byte 0x14)
0014-1013 Vendor information (4096 bytes, padded with 0xff; there seem to be older
0014-0017 Vendor information length (without padding) (4 bytes, big endian)
0018-1013 Vendor information (4092 bytes, padded with 0xff; there seem to be older
(VxWorks-based) TP-LINK devices which use a smaller vendor information block)
1014-1813 Image partition table (2048 bytes, padded with 0xff)
1814-xxxx Firmware partitions
*/
static void * generate_factory_image(const unsigned char *vendor, size_t vendor_len, const struct image_partition_entry *parts, size_t *len) {
static void * generate_factory_image(const char *vendor, const struct image_partition_entry *parts, size_t *len) {
*len = 0x1814;
size_t i;
@ -360,13 +374,12 @@ static void * generate_factory_image(const unsigned char *vendor, size_t vendor_
if (!image)
error(1, errno, "malloc");
image[0] = *len >> 24;
image[1] = *len >> 16;
image[2] = *len >> 8;
image[3] = *len;
put32(image, *len);
memcpy(image+0x14, vendor, vendor_len);
memset(image+0x14+vendor_len, 0xff, 4096-vendor_len);
size_t vendor_len = strlen(vendor);
put32(image+0x14, vendor_len);
memcpy(image+0x18, vendor, vendor_len);
memset(image+0x18+vendor_len, 0xff, 4092-vendor_len);
put_partitions(image + 0x1014, parts);
put_md5(image+0x04, image+0x14, *len-0x14);
@ -430,7 +443,7 @@ static void do_cpe510(const char *output, const char *kernel_image, const char *
parts[0] = make_partition_table(cpe510_partitions);
parts[1] = make_soft_version(rev);
parts[2] = make_support_list(cpe510_support_list, sizeof(cpe510_support_list)-1);
parts[2] = make_support_list(cpe510_support_list);
parts[3] = read_file("os-image", kernel_image, false);
parts[4] = read_file("file-system", rootfs_image, add_jffs2_eof);
@ -439,7 +452,7 @@ static void do_cpe510(const char *output, const char *kernel_image, const char *
if (sysupgrade)
image = generate_sysupgrade_image(cpe510_partitions, parts, &len);
else
image = generate_factory_image(cpe510_vendor, sizeof(cpe510_vendor)-1, parts, &len);
image = generate_factory_image(cpe510_vendor, parts, &len);
FILE *file = fopen(output, "wb");
if (!file)