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c47b9a9c3c57894bef96de80b2acb0c34141460c
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4 Commits
Author SHA1 Message Date
MattJackson c47b9a9c3c Fix CSS decryption: full key hierarchy, correct cipher tables 
- Implement complete CSS key chain: bus auth → disc key → title key
- Add 31 player keys for disc key decryption
- Read disc key via READ DVD STRUCTURE format 0x02
- Read title key via REPORT KEY format 0x04
- Fix CryptKey round 1: use original scratch for term, not modified tmp1
- Fix decrypt_key: use TAB5 for LFSR1 output, TAB4 for LFSR0^invert
- Fix descramble_sector: use TAB5 for LFSR1, TAB4 for LFSR0 (no invert),
  and apply TAB1 permutation to ciphertext before XOR
- Fix title key bus XOR: forward order (bus_key[i]), not reversed
- Two-session auth: disc key and title key need separate AGID sessions
- Fix crack_key: scan across extents for scrambled sectors
- Fix TsDemuxer: dynamic PID table size for DVD PIDs
- Set max read speed after scan for DVD riplock removal
 2026-04-16 04:42:42 +00:00
MattJackson d7b9d87075 v0.10.3: CSS drive authentication for DVD ripping 2026-04-16 00:01:48 +00:00
MattJackson 648ce28ac6 Rewrite CSS from Stevenson 1999 paper — proper table-driven cipher 
- tables.rs: 5 CSS specification tables (TAB1-TAB5, mathematical constants)
- lfsr.rs: Table-driven LFSR1 (TAB2/TAB3) + LFSR0 (TAB4), sector seed XOR,
  decrypt_key() mangling function, descramble_sector() with proper feedback
- crack.rs: Stevenson divide-and-conquer attack (2^16 LFSR1 iteration,
  LFSR0 deduction from known plaintext, 10-byte validation)
- No external code copied — original Rust implementation from the 1999 paper
- 225 tests, 0 ignored
 2026-04-11 17:07:21 +00:00
MattJackson ff5547363b Audit fixes + DVD support foundation (IFO, PS demux, MPEG-2, CSS crack) 
Audit fixes (14 critical, 22 warnings):
- UDF: bounds checks on all ICB/FID parsing from disc data
- SCSI Linux: saturating_sub on residual, CDB length guard, buffer size guard
- SCSI macOS: SCSITaskStatus u32 (was u8 — stack corruption)
- AACS: EC mod_inv returns infinity instead of panic, key reduced mod n
- AACS: do_handshake tries all host certs (was returning on first failure)
- H.264: bounds check on SPS < 4 bytes
- ContentReader: error on missing unit key (was zero-fill)
- KEYDB: flat redirect loop (was recursive), 100MB response limit, Windows HOME fallback
- ISO writer: AVDP extent order, partition length, allocation cap
- Network: removed TCP_NODELAY on bulk stream
- MKV: guard on u64::MAX seek
- disc.rs: saturating_sub on extent offset, simplified dead region code
- cargo fmt (610 violations), cargo clippy --fix (55 auto-fixes)

DVD support (new files):
- src/ifo.rs — IFO parser (VIDEO_TS.IFO, VTS_XX_0.IFO, PGC chains, cells, streams) — 13 tests
- src/mux/ps.rs — MPEG-2 Program Stream demuxer (pack headers, PES, private stream 1) — 12 tests
- src/mux/codec/mpeg2.rs — MPEG-2 video parser (sequence headers, I-frame detection) — 15 tests
- src/css/crack.rs — split-attack algorithm (LFSR cipher needs verification — test ignored)

226 tests total (was 186), 1 ignored (CSS crack needs cipher verification).
 2026-04-11 16:52:22 +00:00