Difference between revisions of "AMPXI:ExportTicketWrapped"
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Latest revision as of 22:08, 1 August 2018
Request[edit]
| Index Word | Description |
|---|---|
| 0 | Header code [0x006D0184] |
| 1 | Crypted ticket buffer length |
| 2 | 256 |
| 3-4 | u64, Title ID |
| 5-6 | u64, Ticket ID |
| 7 | (CryptedTicketBufferLength << 8) | 0x4 |
| 8 | Crypted ticket buffer output pointer |
| 9 | (256 << 8) | 0x14 |
| 10 | Wrapped AES key/IV buffer (size 256) |
Response[edit]
| Index Word | Description |
|---|---|
| 0 | Header code [0x006D00C1] |
| 1 | Result code |
| 2 | Output crypted ticket buffer length |
| 3 | Output wrapped AES key/IV length (should be 256) |
Description[edit]
This function gets a 32 byte buffer using the internal P9 PRNG function; first 16 bytes is used as AES-CBC key and last 16 bytes is used as IV.
Next, it searches through tickets looking for one with provided ticketID, returns 0xD8808040 if not found;
Next, it reads the ticket, 0x8000 bytes at a time, into a 0x8000-byte stack buffer, after each read that buffer is crypted using that randomly generated key/IV, then written into the first output buffer;
Finally, it encrypts the AES key/IV with RSA-2048 PKCS1; using a new public key stored in P9 .rodata; and writes the crypted output into the second output buffer.