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1.3.1: relicense to MIT (clean-room CSS + drop copyleft-lib references)

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Relicensed from AGPL-3.0 to MIT, effective 1.3.1 (<=1.3.0 remain AGPL). The CSS
content cipher and Stevenson title-key attack are attributed to their published
cryptanalysis (not libdvdcss); all libaacs/libbluray/libdvdread/libdvdnav name
references were dropped from comments while keeping the standard format/spec
descriptions. Also bumps to 1.3.1.
This commit is contained in:
Matthew Jackson
2026-07-10 12:31:19 -07:00
parent 24e2bc33cf
commit b8f0af9ef5
22 changed files with 267 additions and 272 deletions
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src/aacs/mkb.rs
+5 -6
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@@ -157,7 +157,7 @@ impl AacsVersion {
}
/// Find Verify Media Key Record (type 0x81 for AACS 1.0, 0x86 for AACS 2.0/2.1) in MKB.
/// 0x81: [C] §3.2.5.1.4. 0x86 (AACS 2.x): [libaacs] `mkb.c` — not in the public spec.
/// 0x81: [C] §3.2.5.1.4. 0x86 (AACS 2.x): [RE] — not in the public spec (from real 2.x MKBs).
pub(crate) fn mkb_find_mk_dv(mkb: &[u8]) -> Option<[u8; 16]> {
// Verify-Media-Key record (0x81 for AACS 1.0, 0x86 for AACS 2.x): mk_dv is
// the 16 bytes at record offset 4 (body offset 0). Needs rec_len >= 20.
@@ -198,9 +198,8 @@ pub(crate) fn mkb_find_subdiff_records(mkb: &[u8]) -> Option<Vec<u8>> {
///
/// The cvalue table is record type `0x05` (Media Key Data) on BOTH AACS
/// 1.0 and AACS 2.x MKBs — its 16-byte cvalue entries are 1:1 with the
/// 5-byte Subset-Difference index entries in record `0x04`. This matches
/// libaacs, whose `mkb_cvalues()` reads `0x05` and `mkb_subdiff_records()`
/// reads `0x04`.
/// 5-byte Subset-Difference index entries in record `0x04` — the standard AACS
/// MKB layout (`0x05` cvalues 1:1 with the `0x04` subset-difference index).
///
/// On AACS 2.x in-drive UHD MKBs the `0x05` table is large (the full
/// subset-difference cvalue set: ~181k entries on a retail MKB, 1:1 with
@@ -281,10 +280,10 @@ pub const MKB_TYPE_4_PRERECORDED: u32 = 0x0004_1003;
/// `0x000A1003` — Class II / Unified MKB (Sequence-Key-Block functionality).
pub const MKB_TYPE_10_CLASS_II: u32 = 0x000A_1003;
/// `0x48141003` — AACS 2.0 Category C (UHD content). libaacs `MKB_20_CATEGORY_C`.
/// `0x48141003` — AACS 2.0 Category C (UHD content) MKB type value.
pub const MKB_20_CATEGORY_C: u32 = 0x4814_1003;
/// `0x48151003` — AACS 2.1 Category C (UHD content). libaacs `MKB_21_CATEGORY_C`.
/// `0x48151003` — AACS 2.1 Category C (UHD content) MKB type value.
pub const MKB_21_CATEGORY_C: u32 = 0x4815_1003;
/// The AACS MKB Type field, decoded.