MattJackson
597f512eca
Fix MPEG-2 PS demuxer: codec parsers, sequence header extraction, descramble
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- Route DVD PS packets through codec parsers (was bypassing them)
- Extract MPEG-2 sequence header with quantizer matrices for MKV codec_private
- Calculate exact sequence header size from intra/non-intra matrix flags
- Capture sequence extension (B5) from subsequent PES packets
- Revert TAB1 permutation in descramble (XOR-only is correct)
- Fix CSS roundtrip tests for new descramble behavior
2026-04-16 15:06:35 +00:00
MattJackson
c47b9a9c3c
Fix CSS decryption: full key hierarchy, correct cipher tables
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- 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
f48b4925c1
Zero clippy warnings: fix all 32 remaining
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- Iterator::find() replaces manual loops (6 sites)
- Index-only loops → iterators (4 sites)
- Identical if-blocks merged
- Box large MkvStream WriteState enum variant
- Vec macro initializers, late init fixes
- Unused fields prefixed with underscore (format spec fields)
- Dead code removed or documented
0 clippy warnings. 319 tests passing.
2026-04-11 19:33:13 +00:00
MattJackson
ffa0eaba4d
cargo fmt + clippy --fix: 104 format violations fixed, 8 clippy auto-fixes
2026-04-11 19:10:20 +00:00
MattJackson
e4c5c88909
CSS crypto tests + DVD pipeline fully wired
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- CSS roundtrip tests: decrypt_key determinism, descramble XOR roundtrip
- CSS table verification: TAB1 is permutation, TAB4 is bit-reversal involution
- DVD scan pipeline confirmed: scan_dvd_titles, CSS crack, ContentReader descramble
- 229 tests, all passing
2026-04-11 17:14:58 +00:00
MattJackson
648ce28ac6
Rewrite CSS from Stevenson 1999 paper — proper table-driven cipher
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- 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)
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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
MattJackson