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v0.10.4: CSS decryption, MPEG-2 PS demuxer fixes

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Full CSS key hierarchy (bus auth, disc key, title key), correct
descramble cipher, MPEG-2 codec parser routing for DVD PS path,
sequence header extraction with quantizer matrices.
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MattJackson
2026-04-16 17:33:29 +00:00
parent f95894bba3
commit 3e5e570573
2 changed files with 14 additions and 1 deletions
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CHANGELOG.md
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# Changelog
## 0.10.4 (2026-04-16)
### CSS decryption — full key hierarchy
- **Bus auth → disc key → title key** — complete CSS key chain. Bus authentication with CSSCryptKey challenge-response, disc key decryption using 31 player keys via READ DVD STRUCTURE, title key extraction via REPORT KEY format 0x04.
- **CSS descramble cipher** — correct LFSR keystream generation with TAB5 for LFSR1 output and TAB4 for LFSR0 output. Per-sector key derivation from title key XOR sector seed.
- **Stevenson plaintext attack** — expanded pattern set (padding, video, audio, nav pack headers), scans up to 50K scrambled sectors for ISO key recovery.
- **Disc::copy() CSS decrypt** — sector-level decryption during disc→ISO copy produces clean ISOs with zero scramble flags.
### MPEG-2 PS demuxer fixes
- **DVD PS path routes through codec parsers** — was bypassing parser.parse(), producing raw PES frames without codec_private extraction or keyframe detection.
- **MPEG-2 sequence header extraction** — calculates exact header size including quantizer matrices (intra/non-intra flags), captures sequence extension from subsequent PES packets.
- **TsDemuxer dynamic PID table** — Vec instead of fixed [i16; 8192] for DVD PIDs that may exceed 8192.
## 0.10.3 (2026-04-16)
### DVD CSS authentication