Open CHKDSK88 opened 2 years ago
JBOOT is closed source bootloader developed by Amit and used by at least in D-Link, Zyxel and Lava routers. Mostly is used with mt7620 processors.
More info can be found at: https://github.com/openwrt/openwrt/blob/master/tools/firmware-utils/src/mkdlinkfw.c
Some examples:
D-Link DWR-118 flash dump:
DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------------------------------------- 8404 0x20D4 LZMA compressed data, properties: 0x5D, dictionary size: 8388608 bytes, uncompressed size: 90640 bytes 65536 0x10000 JBOOT STAG header, image id: 4, timestamp 0x840E932, image size: 1433270 bytes, image JBOOT checksum: 0xF9B7, header JBOOT checksum: 0x6E1 65552 0x10010 JBOOT SCH2 kernel header, compression type: lzma, Entry Point: 0x80000000, image size: 1433230 bytes, data CRC: 0x8A9A4005, Data Address: 0x80000000, rootfs offset: 0xBC180000, rootfs size: 6021120 bytes, rootfs CRC: 0xA4F19C71, header CRC: 0xA4791B1C, header size: 40 bytes, cmd line length: 0 bytes 65592 0x10038 LZMA compressed data, properties: 0x5D, dictionary size: 33554432 bytes, uncompressed size: 4208384 bytes 1572864 0x180000 Squashfs filesystem, little endian, version 4.0, compression:gzip, size: 6017560 bytes, 1308 inodes, blocksize: 131072 bytes, created: 2015-09-25 09:28:40 15794176 0xF10000 JBOOT STAG header, image id: 5, timestamp 0x8447E0A, image size: 819200 bytes, image JBOOT checksum: 0xD8DE, header JBOOT checksum: 0xF09C 15794192 0xF10010 Squashfs filesystem, little endian, version 4.0, compression:gzip, size: 816240 bytes, 199 inodes, blocksize: 131072 bytes, created: 2015-10-06 06:16:11 16711680 0xFF0000 JBOOT STAG header, image id: 7, timestamp 0x50, image size: 1442 bytes, image JBOOT checksum: 0xDF2F, header JBOOT checksum: 0xE8B2 16711744 0xFF0040 Zlib compressed data, default compression 16769024 0xFFE000 JBOOT STAG header, image id: 2, timestamp 0x85D89DC, image size: 1168 bytes, image JBOOT checksum: 0xFFFF, header JBOOT checksum: 0x3C10
OpenWrt D-Link DWR-960 factory image:
DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------------------------------------- 0 0x0 ARM update header (used with JBOOT), vendor: D-Link, ROM ID: DLK6E2429001, header JBOOT checksum: 0xD205, lpvs: 1 mbz: 0 timestamp 0xB0B4F06, erease start: 0x10000, erease length: 16646144 bytes, data start: 0x10000, data length: 5505028 bytes, header version: 2, section id: 4, image info type: 4, image info address: 0x0, family member: 0x6E24, header JBOOT checksum: 0xCFB0 80 0x50 JBOOT STAG header, image id: 4, timestamp 0xB0B4F06, image size: 1991009 bytes, image JBOOT checksum: 0xBC5C, header JBOOT checksum: 0x58EA 96 0x60 JBOOT SCH2 kernel header, compression type: lzma, Entry Point: 0x80000000, image size: 1990969 bytes, data CRC: 0x727B2B18, Data Address: 0x80000000, rootfs offset: 0x1F6171, rootfs size: 3333398 bytes, rootfs CRC: 0x21CF9FA4, header CRC: 0x166F4ABB, header size: 40 bytes, cmd line length: 0 bytes 136 0x88 LZMA compressed data, properties: 0x6D, dictionary size: 8388608 bytes, uncompressed size: 6215840 bytes 1991105 0x1E61C1 Squashfs filesystem, little endian, version 4.0, compression:xz, size: 3333398 bytes, 1630 inodes, blocksize: 262144 bytes, created: 2021-08-31 22:20:08
Zyxel firmware file:
DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------------------------------------- 0 0x0 ARM update header (used with JBOOT), vendor: Zyxel, ROM ID: ZXL6E2431001, header JBOOT checksum: 0xC252, lpvs: 1 mbz: 0 timestamp 0x9AD0949, erease start: 0x10000, erease length: 1507328 bytes, data start: 0x10000, data length: 1310936 bytes, header version: 2, section id: 4, image info type: 4, image info address: 0x0, family member: 0x6E24, header JBOOT checksum: 0x19C3 80 0x50 JBOOT STAG header, image id: 4, timestamp 0x9AD0949, image size: 1310920 bytes, image JBOOT checksum: 0xC157, header JBOOT checksum: 0xFBAD 96 0x60 JBOOT SCH2 kernel header, compression type: lzma, Entry Point: 0x80000000, image size: 1310880 bytes, data CRC: 0x835AA6DC, Data Address: 0x80000000, rootfs offset: 0xBC180000, rootfs size: 8900608 bytes, rootfs CRC: 0x9AD2B4EC, header CRC: 0xEB2BFD8E, header size: 40 bytes, cmd line length: 0 bytes 136 0x88 LZMA compressed data, properties: 0x5D, dictionary size: 33554432 bytes, uncompressed size: 3840340 bytes 937300 0xE4D54 JBOOT STAG header, image id: 8, timestamp 0xEF9590C2, image size: 2708135554 bytes, image JBOOT checksum: 0x1B83, header JBOOT checksum: 0xC056 1311016 0x140128 ARM update header (used with JBOOT), vendor: Zyxel, ROM ID: ZXL6E2431001, header JBOOT checksum: 0xDE9A, lpvs: 1 mbz: 0 timestamp 0x9AD0949, erease start: 0x180000, erease length: 13697024 bytes, data start: 0x180000, data length: 8900608 bytes, header version: 2, section id: 8, image info type: 0, image info address: 0x0, family member: 0x6E24, header JBOOT checksum: 0x30F3 1311096 0x140178 Squashfs filesystem, little endian, version 4.0, compression:gzip, size: 8899886 bytes, 1598 inodes, blocksize: 131072 bytes, created: 2018-10-04 04:16:39 10211704 0x9BD178 ARM update header (used with JBOOT), vendor: Zyxel, ROM ID: ZXL6E2431001, header JBOOT checksum: 0xD94B, lpvs: 1 mbz: 0 timestamp 0x9AD0949, erease start: 0xF10000, erease length: 917504 bytes, data start: 0xF10000, data length: 512016 bytes, header version: 2, section id: 5, image info type: 0, image info address: 0x0, family member: 0x6E24, header JBOOT checksum: 0x35C6 10211800 0x9BD1D8 Squashfs filesystem, little endian, version 4.0, compression:gzip, size: 510048 bytes, 251 inodes, blocksize: 131072 bytes, created: 2018-10-04 04:16:38
Signed-off-by: Pawel Dembicki paweldembicki@gmail.com
JBOOT is closed source bootloader developed by Amit and used by at least in D-Link, Zyxel and Lava routers. Mostly is used with mt7620 processors.
More info can be found at: https://github.com/openwrt/openwrt/blob/master/tools/firmware-utils/src/mkdlinkfw.c
Some examples:
D-Link DWR-118 flash dump:
OpenWrt D-Link DWR-960 factory image:
Zyxel firmware file:
Signed-off-by: Pawel Dembicki paweldembicki@gmail.com