AFV: Difference between revisions
| Line 58: | Line 58: | ||
! Offset !! Description | ! Offset !! Description | ||
|- | |- | ||
| 0x0 to 0x30 || | | 0x0 to 0x30 || Activation Data (as seen in act.dat) | ||
|- | |- | ||
| 0x30 to 0x40 || Separator, always 0x00 | | 0x30 to 0x40 || Separator, always 0x00 | ||
Revision as of 17:03, 4 January 2019
Activation File Verification
AFV are activation files used for/by development unit, they follow this format
# VITA/ActivationCode # format_version=1 # code_num=2 # code_size=199 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, 1546297725, 2082758400, 1, f32fe2cc3a6346714949b219e68391d13766e467053b265d110241c33c7d8e58d4466c84a9d2422511b11a450b34c6db270b51f55d5921ea50c7feb571675a88 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb, 1546297725, 2082758400, 1, f32fe2cc3a6346714949b219e68391d149cadd26411291837b62c98ad5a7cd8b64dff1c0a224273c9de99327b3a5f6524db261536fe60f657056be94d0ee08d0
Syntax of the header is as follows:
| Value | Description |
|---|---|
| # VITA/ActivationCode | MAGIC |
| # format_version=1 | AFV format version |
| # code_num=2 | Number of activation codes, can be incremented to add multiple devices per activation file |
| # code_size=199 | Number of characters per code + 1 |
| # extra_data_size=513 | Only in later activation files using signatures (for firmware 2.10+) |
# VITA/ActivationCode # format_version=1 # code_num=1 # code_size=199 Activation_ID, start_date(epoch decimal), end_date(epoch decimal), activation_counter, encrypted_activation_token+cmac
Crafting your own AFV
build a 0x70 token buffer as follows:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 00000000 61 63 74 00 01 00 00 00 01 00 00 00 7D A1 2A 5C act.........}¡*\ 00000010 00 5F 24 7C AA AA AA AA AA AA AA AA AA AA AA AA ._$|ªªªªªªªªªªªª 00000020 AA AA AA AA 00 00 00 00 00 00 00 00 00 00 00 00 ªªªª............ 00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00000040 61 63 74 00 01 00 00 00 01 00 00 00 7D A1 2A 5C act.........}¡*\ 00000050 00 5F 24 7C AA AA AA AA AA AA AA AA AA AA AA AA ._$|ªªªªªªªªªªªª 00000060 AA AA AA AA 00 00 00 00 00 00 00 00 00 00 00 00 ªªªª............
| Offset | Description |
|---|---|
| 0x0 to 0x30 | Activation Data (as seen in act.dat) |
| 0x30 to 0x40 | Separator, always 0x00 |
| 0x40 to 0x70 | encrypted token (in decrypted form), can be a 100% copy of the data from 0x0 to 0x30 |
| 0x0 to 0x02 | Magic |
| 0x04 | token version? (always 0x1) |
| 0x45 | set to 0x01 on later encrypted token (ignored on the vita side, never set on decrypted token) |
| 0x46 | set to the first AID byte in later encrypted tokens (ignored on the vita side, never set on decrypted token) |
| 0x47 | set to the second AID byte in later encrypted tokens (ignored on the vita side, never set on decrypted token) |
| 0x08 | token counter (increments for each activation, it needs to be higher than the current token/activation counter, you may need to keep incrementing it until it works, or use a higher value like 0x20) |
| 0x0C | Start date (Unix time, hex, little endian) |
| 0x10 | End date (Unix time, hex, little endian) |
| 0x14 | Activation ID (0x10 in size, Big endian) |
| 0x70 to 0x80 | CMAC of 0 thru 0x70 (not in the above buffer) |
It is speculated that on later sony's own encrypted token bytes 0x05 to 0x07 are set to avoid having the first encrypted CBC block data repeat across multiple devices those bytes are ignored by act_sm and can be all set to 0x00.
calculate the CMAC of that buffer using the following operation:
openssl dgst -mac cmac -macopt cipher:aes-256-cbc -macopt hexkey:846D2DFD77D3C2E5F0E17EB18CC786928B881E2E17AE0CD8FDE88809D0D033C5 token_buffer.bin
For that particular buffer the return value is: CMAC(token_buffer.bin)= e555fe806c33978b4694af72b5597b1d
create a 0x40 buffer using data of your previous buffer from 0x40 to 0x60 and append the result CMAC computation at 0x70 as such
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00000000 61 63 74 00 01 00 00 00 01 00 00 00 7D A1 2A 5C act.........}¡*\
00000010 00 5F 24 7C AA AA AA AA AA AA AA AA AA AA AA AA ._$|ªªªªªªªªªªªª
00000020 AA AA AA AA 00 00 00 00 00 00 00 00 00 00 00 00 ªªªª............
00000030 E5 55 FE 80 6C 33 97 8B 46 94 AF 72 B5 59 7B 1D åUþ€l3—‹F”¯rµY{.
Encrypt the buffer with the following command:
openssl aes-256-cbc -in step2.bin -K 846D2DFD77D3C2E5F0E17EB18CC786928B881E2E17AE0CD8FDE88809D0D 033C5 -iv C8A040662B10A1986A1894E94FBEFCF0 -e > encrypted_token.bin
Get the first 0x40 bytes of that encrypted buffer (disregard the last 0x10 bytes of CBC padding), that will be your encrypted token
Below is the result for that particular token.
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 00000000 F3 2F E2 CC 3A 63 46 71 49 49 B2 19 E6 83 91 D1 ó/âÌ:cFqII².æƒ‘Ñ 00000010 37 66 E4 67 05 3B 26 5D 11 02 41 C3 3C 7D 8E 58 7fäg.;&]..AÃ<}ŽX 00000020 D4 46 6C 84 A9 D2 42 25 11 B1 1A 45 0B 34 C6 DB ÔFl„©ÒB%.±.E.4ÆÛ 00000030 27 0B 51 F5 5D 59 21 EA 50 C7 FE B5 71 67 5A 88 '.Qõ]Y!êPÇþµqgZˆ
You can now create your afv file as shown below
# VITA/ActivationCode # format_version=1 # code_num=1 # code_size=199 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, 1546297725, 2082758400, 1, f32fe2cc3a6346714949b219e68391d13766e467053b265d110241c33c7d8e58d4466c84a9d2422511b11a450b34c6db270b51f55d5921ea50c7feb571675a88