AACS complete: Unit_Key_RO.inf parser, disc hash, MKB processing, resolve chain
- Unit_Key_RO.inf: proper parser matching libaacs format (uk_pos, stride, AACS1 48-byte / AACS2 64-byte key spacing, title→CPS unit mapping) - Disc hash: SHA1 of Unit_Key_RO.inf for KEYDB lookup - MKB processing: processing keys + subdiff records + cvalues → media key (verify media key record with 12-byte zero check) - Content Certificate parser: detect AACS version + bus encryption flag - resolve_keys(): full 3-path chain: 1. disc hash → KEYDB → VUK (fast, 99% of discs) 2. KEYDB media key + VID → VUK 3. MKB + processing keys → media key → VUK - setup_aacs() now reads Unit_Key_RO.inf + Content Cert from disc via UDF - 31 tests passing
This commit is contained in:
MattJackson
@@ -32,3 +32,7 @@ path = "src/bin/freemkv_info.rs"
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[[bin]]
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name = "freemkv-test"
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path = "src/bin/freemkv_test.rs"
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[[bin]]
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name = "aacs-test"
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path = "src/bin/aacs_test.rs"
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+531
-23
@@ -365,37 +365,421 @@ pub fn decrypt_unit_key(vuk: &[u8; 16], encrypted_uk: &[u8; 16]) -> [u8; 16] {
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// ── Unit_Key_RO.inf parsing ─────────────────────────────────────────────────
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/// Extract encrypted unit keys from Unit_Key_RO.inf data.
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/// Returns vec of (cps_unit_number, encrypted_key).
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pub fn parse_unit_key_ro(data: &[u8]) -> Vec<(u32, [u8; 16])> {
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// Minimum size check
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if data.len() < 0xA0 {
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return Vec::new();
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/// Parsed Unit_Key_RO.inf file.
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#[derive(Debug)]
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pub struct UnitKeyFile {
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/// Disc hash (SHA1 of the entire file) — used as KEYDB lookup key
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pub disc_hash: [u8; 20],
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/// Application type (1 = BD-ROM)
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pub app_type: u8,
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/// Number of BDMV directories
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pub num_bdmv_dir: u8,
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/// Whether SKB MKB is used
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pub use_skb_mkb: bool,
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/// Whether this is AACS 2.0
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pub aacs2: bool,
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/// Encrypted unit keys (CPS unit number, encrypted key)
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pub encrypted_keys: Vec<(u32, [u8; 16])>,
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/// Title → CPS unit index mapping (title_idx → unit_key_idx)
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pub title_cps_unit: Vec<u16>,
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}
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/// Compute disc hash (SHA1 of Unit_Key_RO.inf content).
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pub fn disc_hash(data: &[u8]) -> [u8; 20] {
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use sha1::{Sha1, Digest};
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let hash = Sha1::digest(data);
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let mut out = [0u8; 20];
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out.copy_from_slice(&hash);
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out
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}
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/// Format disc hash as hex string with 0x prefix (for KEYDB lookup).
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pub fn disc_hash_hex(hash: &[u8; 20]) -> String {
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let mut s = String::with_capacity(42);
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s.push_str("0x");
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for b in hash {
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s.push_str(&format!("{:02X}", b));
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}
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s
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}
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/// Parse Unit_Key_RO.inf from raw bytes.
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///
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/// Format (from AACS spec):
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/// [0..4] BE32: offset to key storage area (uk_pos)
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/// [16] app_type (1 = BD-ROM)
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/// [17] num_bdmv_dir
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/// [18] bit 7: use_skb_mkb
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/// [20..22] BE16: first_play CPS unit
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/// [22..24] BE16: top_menu CPS unit
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/// [24..26] BE16: num_titles
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/// [26..] title entries: 2 bytes padding + 2 bytes CPS unit, × num_titles
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///
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/// Key storage at uk_pos:
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/// [uk_pos..uk_pos+2] BE16: num_unit_keys
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/// [uk_pos+48..] encrypted keys, 16 bytes each
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/// AACS 1.0: 48-byte stride
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/// AACS 2.0: 64-byte stride (48 + 16 extra)
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pub fn parse_unit_key_ro(data: &[u8], aacs2: bool) -> Option<UnitKeyFile> {
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if data.len() < 20 {
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return None;
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}
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// Number of unit keys at offset 0x10 (big-endian u16)
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// But the first key is always at offset 0x90
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let mut keys = Vec::new();
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let hash = disc_hash(data);
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// Read number of keys from offset 0x20 (varies by format)
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// Simple approach: key table starts at 0x90, each key is 16 bytes
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// First key is CPS unit 1
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let mut offset = 0x90;
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let mut unit_num = 1u32;
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// Header
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let app_type = data[16];
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let num_bdmv_dir = data[17];
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let use_skb_mkb = (data[18] >> 7) & 1 == 1;
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while offset + 16 <= data.len() {
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let mut key = [0u8; 16];
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key.copy_from_slice(&data[offset..offset + 16]);
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// Stop if we hit all zeros (no more keys)
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if key == [0u8; 16] {
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// Key storage offset
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let uk_pos = u32::from_be_bytes([data[0], data[1], data[2], data[3]]) as usize;
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if uk_pos + 2 > data.len() {
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return None;
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}
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// Number of unit keys
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let num_uk = u16::from_be_bytes([data[uk_pos], data[uk_pos + 1]]) as usize;
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if num_uk == 0 {
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return Some(UnitKeyFile {
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disc_hash: hash, app_type, num_bdmv_dir, use_skb_mkb,
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aacs2, encrypted_keys: Vec::new(), title_cps_unit: Vec::new(),
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});
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}
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// Stride between keys
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let stride = if aacs2 { 64 } else { 48 };
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// Validate size
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let keys_start = uk_pos + 48; // first key at uk_pos + 48
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if keys_start + 16 > data.len() {
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return None;
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}
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// Extract encrypted keys
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let mut encrypted_keys = Vec::with_capacity(num_uk);
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let mut pos = keys_start;
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for i in 0..num_uk {
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if pos + 16 > data.len() {
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break;
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}
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keys.push((unit_num, key));
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unit_num += 1;
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offset += 16;
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let mut key = [0u8; 16];
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key.copy_from_slice(&data[pos..pos + 16]);
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encrypted_keys.push(((i + 1) as u32, key));
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pos += stride;
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}
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keys
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// Title → CPS unit mapping
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let mut title_cps_unit = Vec::new();
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if data.len() >= 26 {
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let first_play = u16::from_be_bytes([data[20], data[21]]);
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let top_menu = u16::from_be_bytes([data[22], data[23]]);
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let num_titles = u16::from_be_bytes([data[24], data[25]]) as usize;
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title_cps_unit.push(first_play);
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title_cps_unit.push(top_menu);
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for i in 0..num_titles {
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let off = 26 + i * 4 + 2; // 2 bytes padding + 2 bytes CPS unit
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if off + 2 <= data.len() {
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let cps = u16::from_be_bytes([data[off], data[off + 1]]);
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title_cps_unit.push(cps);
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}
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}
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}
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Some(UnitKeyFile {
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disc_hash: hash,
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app_type,
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num_bdmv_dir,
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use_skb_mkb,
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aacs2,
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encrypted_keys,
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title_cps_unit,
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})
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}
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// ── MKB processing ──────────────────────────────────────────────────────────
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/// Derive Media Key from MKB data using processing keys.
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///
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/// Processing keys are pre-computed keys that work for specific MKB versions.
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/// This is the fast path — no subset-difference tree traversal needed.
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///
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/// MKB format:
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/// Record type 0x10 = Verify Media Key Record (has mk_dv)
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/// Record type 0x81 = Type and Version Record (has MKB version)
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/// Record type 0x04 = Subset-Difference Index (has UVS entries)
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/// Record type 0x07 = Explicit Subset-Difference Record (has cvalues)
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pub fn derive_media_key_from_pk(mkb: &[u8], processing_keys: &[[u8; 16]]) -> Option<[u8; 16]> {
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// Parse MKB records
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let mk_dv = mkb_find_mk_dv(mkb)?;
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let uvs = mkb_find_subdiff_records(mkb)?;
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let cvalues = mkb_find_cvalues(mkb)?;
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// Count UV entries (each 5 bytes, stop when high bits set)
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let num_uvs = uvs.chunks(5).take_while(|c| c.len() == 5 && (c[0] & 0xC0) == 0).count();
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// Try each processing key against each UV/cvalue pair
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for pk in processing_keys {
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for i in 0..num_uvs {
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let uv = &uvs[1 + i * 5..]; // skip first byte
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let cv = &cvalues[i * 16..(i + 1) * 16];
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if let Some(mk) = validate_processing_key(pk, cv, uv, &mk_dv) {
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return Some(mk);
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}
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}
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}
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None
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}
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/// Validate a processing key against a cvalue/UV pair.
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/// Returns the Media Key if valid.
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fn validate_processing_key(pk: &[u8; 16], cvalue: &[u8], _uv: &[u8], mk_dv: &[u8; 16]) -> Option<[u8; 16]> {
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if cvalue.len() < 16 {
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return None;
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}
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// mk = AES-DEC(pk, cvalue) XOR cvalue
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let mut cv = [0u8; 16];
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cv.copy_from_slice(&cvalue[..16]);
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let mut mk = aes_ecb_decrypt(pk, &cv);
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for i in 0..16 {
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mk[i] ^= cv[i];
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}
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// Verify: AES-ECB(mk, mk_dv) should produce a specific pattern
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let verify = aes_ecb_encrypt(&mk, mk_dv);
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// mk_dv verification: the first 12 bytes of AES(mk, mk_dv) should be all 0xDEADBEEF...
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// Actually per AACS spec: verify record value is AES(mk, all_zeros)
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// No — the mk_dv IS the verification value. We compute AES-ECB(mk, verify_data)
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// and check it matches.
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// From libaacs _validate_pk:
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// crypto_aes128d(pk, rec + a*16, mk) → decrypt cvalue with PK
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// mk[i] ^= rec[i] → XOR with cvalue
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// crypto_aes128e(mk, mk_dv, test) → encrypt mk_dv with derived mk
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// if first 12 bytes of test are zero → valid media key
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let test = aes_ecb_encrypt(&mk, mk_dv);
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// AACS spec: Verify Media Key record — first 12 bytes must be zero
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if test[..12] == [0u8; 12] {
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return Some(mk);
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}
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None
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}
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/// Find Verify Media Key Record (type 0x10) in MKB.
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fn mkb_find_mk_dv(mkb: &[u8]) -> Option<[u8; 16]> {
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let mut pos = 0;
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while pos + 4 <= mkb.len() {
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let rec_type = mkb[pos];
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let rec_len = u32::from_be_bytes([0, mkb[pos + 1], mkb[pos + 2], mkb[pos + 3]]) as usize;
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if rec_len < 4 || pos + rec_len > mkb.len() { break; }
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if rec_type == 0x10 && rec_len >= 20 {
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// mk_dv is at offset 4 (after record header)
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let mut dv = [0u8; 16];
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dv.copy_from_slice(&mkb[pos + 4..pos + 20]);
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return Some(dv);
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}
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pos += rec_len;
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}
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None
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}
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/// Find Subset-Difference records (type 0x04) in MKB.
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fn mkb_find_subdiff_records(mkb: &[u8]) -> Option<Vec<u8>> {
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let mut pos = 0;
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while pos + 4 <= mkb.len() {
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let rec_type = mkb[pos];
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let rec_len = u32::from_be_bytes([0, mkb[pos + 1], mkb[pos + 2], mkb[pos + 3]]) as usize;
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if rec_len < 4 || pos + rec_len > mkb.len() { break; }
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if rec_type == 0x04 && rec_len > 4 {
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return Some(mkb[pos + 4..pos + rec_len].to_vec());
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}
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pos += rec_len;
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}
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None
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}
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/// Find Conditional Values (cvalues) record (type 0x07) in MKB.
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fn mkb_find_cvalues(mkb: &[u8]) -> Option<Vec<u8>> {
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let mut pos = 0;
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while pos + 4 <= mkb.len() {
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let rec_type = mkb[pos];
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let rec_len = u32::from_be_bytes([0, mkb[pos + 1], mkb[pos + 2], mkb[pos + 3]]) as usize;
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if rec_len < 4 || pos + rec_len > mkb.len() { break; }
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if rec_type == 0x07 && rec_len > 4 {
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return Some(mkb[pos + 4..pos + rec_len].to_vec());
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}
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pos += rec_len;
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}
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None
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}
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/// Get MKB version from Type and Version Record (type 0x81).
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pub fn mkb_version(mkb: &[u8]) -> Option<u32> {
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let mut pos = 0;
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while pos + 4 <= mkb.len() {
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let rec_type = mkb[pos];
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let rec_len = u32::from_be_bytes([0, mkb[pos + 1], mkb[pos + 2], mkb[pos + 3]]) as usize;
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if rec_len < 4 || pos + rec_len > mkb.len() { break; }
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if rec_type == 0x81 && rec_len >= 8 {
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return Some(u32::from_be_bytes([mkb[pos + 4], mkb[pos + 5], mkb[pos + 6], mkb[pos + 7]]));
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}
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pos += rec_len;
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}
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None
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}
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// ── Content Certificate parsing ─────────────────────────────────────────────
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/// AACS Content Certificate — identifies disc AACS version and features.
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#[derive(Debug)]
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pub struct ContentCert {
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/// Bus encryption enabled flag
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pub bus_encryption: bool,
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/// Content Certificate ID (6 bytes)
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pub cc_id: [u8; 6],
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/// AACS version: false = AACS 1.0, true = AACS 2.0
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pub aacs2: bool,
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}
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/// Parse a Content Certificate (ContentXXX.cer) file.
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pub fn parse_content_cert(data: &[u8]) -> Option<ContentCert> {
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if data.len() < 8 {
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return None;
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}
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// Content Certificate format:
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// [0] certificate type (0x00 = AACS1, 0x01 = AACS2)
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// [1] bus_encryption_enabled (bit 0)
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// [2..8] cc_id (6 bytes)
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let aacs2 = data[0] != 0x00;
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let bus_encryption = (data[1] & 0x01) != 0;
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let mut cc_id = [0u8; 6];
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cc_id.copy_from_slice(&data[2..8]);
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Some(ContentCert {
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bus_encryption,
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cc_id,
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aacs2,
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})
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}
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// ── Full VUK resolution chain ───────────────────────────────────────────────
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/// Result of resolving a disc's VUK.
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#[derive(Debug)]
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pub struct ResolvedKeys {
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/// Disc hash (SHA1 of Unit_Key_RO.inf)
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pub disc_hash: [u8; 20],
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/// Volume Unique Key
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pub vuk: [u8; 16],
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/// Decrypted unit keys (CPS unit number, key)
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pub unit_keys: Vec<(u32, [u8; 16])>,
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/// Title → CPS unit index mapping
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pub title_cps_unit: Vec<u16>,
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/// Whether AACS 2.0
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pub aacs2: bool,
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/// Whether bus encryption is enabled (from Content Certificate)
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pub bus_encryption: bool,
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}
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/// Resolve all AACS keys for a disc given:
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/// - Unit_Key_RO.inf raw data
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/// - Content Certificate raw data (optional, for AACS version detection)
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/// - Volume ID (from SCSI handshake)
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/// - KEYDB
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///
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/// Tries in order:
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/// 1. Disc hash → KEYDB → VUK (fast path)
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/// 2. KEYDB media key + volume ID → VUK (if disc hash not in KEYDB but MK is)
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/// 3. MKB + processing keys → media key → VUK (full derivation)
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pub fn resolve_keys(
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unit_key_ro_data: &[u8],
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content_cert_data: Option<&[u8]>,
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volume_id: &[u8; 16],
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keydb: &KeyDb,
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mkb_data: Option<&[u8]>,
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) -> Option<ResolvedKeys> {
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// Detect AACS version
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let aacs2 = content_cert_data
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.and_then(|d| parse_content_cert(d))
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.map(|cc| cc.aacs2)
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.unwrap_or(false);
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let bus_encryption = content_cert_data
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.and_then(|d| parse_content_cert(d))
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.map(|cc| cc.bus_encryption)
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.unwrap_or(false);
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// Parse Unit_Key_RO.inf
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let uk_file = parse_unit_key_ro(unit_key_ro_data, aacs2)?;
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let hash_hex = disc_hash_hex(&uk_file.disc_hash);
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// Path 1: Look up VUK by disc hash in KEYDB
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if let Some(entry) = keydb.find_disc(&hash_hex) {
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if let Some(vuk) = entry.vuk {
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// Decrypt unit keys with VUK
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let unit_keys: Vec<(u32, [u8; 16])> = uk_file.encrypted_keys.iter()
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.map(|(num, enc_key)| (*num, decrypt_unit_key(&vuk, enc_key)))
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.collect();
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return Some(ResolvedKeys {
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disc_hash: uk_file.disc_hash,
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vuk,
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unit_keys,
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title_cps_unit: uk_file.title_cps_unit,
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aacs2,
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bus_encryption,
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});
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}
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}
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// Path 2: Find entry with matching VID → derive VUK from MK + VID
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for entry in keydb.disc_entries.values() {
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if let (Some(mk), Some(did)) = (entry.media_key, entry.disc_id) {
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if did == *volume_id {
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let vuk = derive_vuk(&mk, volume_id);
|
||||
let unit_keys: Vec<(u32, [u8; 16])> = uk_file.encrypted_keys.iter()
|
||||
.map(|(num, enc_key)| (*num, decrypt_unit_key(&vuk, enc_key)))
|
||||
.collect();
|
||||
|
||||
return Some(ResolvedKeys {
|
||||
disc_hash: uk_file.disc_hash,
|
||||
vuk,
|
||||
unit_keys,
|
||||
title_cps_unit: uk_file.title_cps_unit,
|
||||
aacs2,
|
||||
bus_encryption,
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Path 3: MKB + processing keys → media key → VUK
|
||||
if let Some(mkb) = mkb_data {
|
||||
if let Some(mk) = derive_media_key_from_pk(mkb, &keydb.processing_keys) {
|
||||
let vuk = derive_vuk(&mk, volume_id);
|
||||
let unit_keys: Vec<(u32, [u8; 16])> = uk_file.encrypted_keys.iter()
|
||||
.map(|(num, enc_key)| (*num, decrypt_unit_key(&vuk, enc_key)))
|
||||
.collect();
|
||||
|
||||
return Some(ResolvedKeys {
|
||||
disc_hash: uk_file.disc_hash,
|
||||
vuk,
|
||||
unit_keys,
|
||||
title_cps_unit: uk_file.title_cps_unit,
|
||||
aacs2,
|
||||
bus_encryption,
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
None
|
||||
}
|
||||
|
||||
// ── Content decryption ──────────────────────────────────────────────────────
|
||||
@@ -769,4 +1153,128 @@ mod tests {
|
||||
eprintln!("Parsed {} disc entries, {} DK, {} PK",
|
||||
db.disc_entries.len(), db.device_keys.len(), db.processing_keys.len());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_disc_hash() {
|
||||
// SHA1 of a known byte sequence
|
||||
let data = b"test unit key ro inf data";
|
||||
let hash = disc_hash(data);
|
||||
assert_ne!(hash, [0u8; 20]);
|
||||
// Same input → same hash
|
||||
assert_eq!(hash, disc_hash(data));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_disc_hash_hex() {
|
||||
let hash = [***REMOVED***];
|
||||
let hex = disc_hash_hex(&hash);
|
||||
assert_eq!(hex, "***REMOVED***");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_unit_key_ro_synthetic() {
|
||||
// Build a synthetic Unit_Key_RO.inf
|
||||
// Header: uk_pos at offset 0 (BE32), points to key storage
|
||||
// Keys at uk_pos + 48 (16 bytes each, 48-byte stride for AACS 1.0)
|
||||
let mut data = vec![0u8; 256];
|
||||
|
||||
// uk_pos = 0x60 (96)
|
||||
data[0] = 0x00; data[1] = 0x00; data[2] = 0x00; data[3] = 0x60;
|
||||
|
||||
// Header fields at 16-18
|
||||
data[16] = 1; // app_type = BD-ROM
|
||||
data[17] = 1; // num_bdmv_dir
|
||||
data[18] = 0; // no SKB
|
||||
|
||||
// Title mapping at 20-25
|
||||
data[20] = 0; data[21] = 1; // first_play = CPS unit 1
|
||||
data[22] = 0; data[23] = 1; // top_menu = CPS unit 1
|
||||
data[24] = 0; data[25] = 1; // num_titles = 1
|
||||
// Title 0 entry: 2 bytes pad + CPS unit
|
||||
data[28] = 0; data[29] = 1; // CPS unit 1
|
||||
|
||||
// Key storage at offset 0x60
|
||||
let uk_pos = 0x60usize;
|
||||
data[uk_pos] = 0; data[uk_pos + 1] = 2; // 2 unit keys
|
||||
|
||||
// Key 1 at uk_pos + 48
|
||||
let key1_pos = uk_pos + 48;
|
||||
for i in 0..16 { data[key1_pos + i] = 0xAA; }
|
||||
|
||||
// Key 2 at uk_pos + 48 + 48
|
||||
let key2_pos = key1_pos + 48;
|
||||
for i in 0..16 { data[key2_pos + i] = 0xBB; }
|
||||
|
||||
let parsed = parse_unit_key_ro(&data, false).unwrap();
|
||||
assert_eq!(parsed.app_type, 1);
|
||||
assert_eq!(parsed.num_bdmv_dir, 1);
|
||||
assert!(!parsed.aacs2);
|
||||
assert_eq!(parsed.encrypted_keys.len(), 2);
|
||||
assert_eq!(parsed.encrypted_keys[0].0, 1); // CPS unit 1
|
||||
assert_eq!(parsed.encrypted_keys[0].1, [0xAA; 16]);
|
||||
assert_eq!(parsed.encrypted_keys[1].0, 2); // CPS unit 2
|
||||
assert_eq!(parsed.encrypted_keys[1].1, [0xBB; 16]);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mkb_version_parse() {
|
||||
// Synthetic MKB with Type and Version record (0x81)
|
||||
let mut mkb = vec![0u8; 32];
|
||||
// Record: type=0x81, length=12 (BE24)
|
||||
mkb[0] = 0x81;
|
||||
mkb[1] = 0x00; mkb[2] = 0x00; mkb[3] = 0x0C;
|
||||
// Version = 77
|
||||
mkb[4] = 0x00; mkb[5] = 0x00; mkb[6] = 0x00; mkb[7] = 77;
|
||||
|
||||
assert_eq!(mkb_version(&mkb), Some(77));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_resolve_keys_vuk_path() {
|
||||
// Test the full resolve chain using VUK path
|
||||
let path = std::path::Path::new("");
|
||||
if !path.exists() { return; }
|
||||
let db = KeyDb::load(path).unwrap();
|
||||
|
||||
// Find V for Vendetta BD — has VUK and unit keys
|
||||
// hash: ***REMOVED***
|
||||
let entry = db.find_disc("***REMOVED***");
|
||||
if entry.is_none() { return; }
|
||||
let entry = entry.unwrap();
|
||||
let vuk = entry.vuk.unwrap();
|
||||
let vid = entry.disc_id.unwrap();
|
||||
|
||||
// We need the actual Unit_Key_RO.inf from the disc to compute disc hash.
|
||||
// Since we don't have it, we can at least test that the KEYDB lookup
|
||||
// works with a known hash.
|
||||
let hash_hex = "***REMOVED***";
|
||||
let found = db.find_disc(hash_hex);
|
||||
assert!(found.is_some());
|
||||
assert_eq!(found.unwrap().vuk, Some(vuk));
|
||||
|
||||
// Verify VUK derivation if we have MK + VID
|
||||
if let Some(mk) = entry.media_key {
|
||||
let derived = derive_vuk(&mk, &vid);
|
||||
assert_eq!(derived, vuk, "VUK derivation mismatch for V for Vendetta");
|
||||
eprintln!("V for Vendetta VUK derivation verified");
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_content_cert_parse() {
|
||||
// AACS 1.0 cert
|
||||
let mut data = vec![0u8; 16];
|
||||
data[0] = 0x00; // AACS 1.0
|
||||
data[1] = 0x00; // no bus encryption
|
||||
let cc = parse_content_cert(&data).unwrap();
|
||||
assert!(!cc.aacs2);
|
||||
assert!(!cc.bus_encryption);
|
||||
|
||||
// AACS 2.0 with bus encryption
|
||||
data[0] = 0x01; // AACS 2.0
|
||||
data[1] = 0x01; // bus encryption enabled
|
||||
let cc = parse_content_cert(&data).unwrap();
|
||||
assert!(cc.aacs2);
|
||||
assert!(cc.bus_encryption);
|
||||
}
|
||||
}
|
||||
|
||||
@@ -0,0 +1,105 @@
|
||||
//! aacs-test — Test AACS handshake against a real drive.
|
||||
//!
|
||||
//! Usage: aacs-test /dev/sr0 /path/to/keydb.cfg
|
||||
|
||||
use std::env;
|
||||
use std::path::Path;
|
||||
|
||||
fn main() {
|
||||
let args: Vec<String> = env::args().collect();
|
||||
if args.len() < 3 {
|
||||
eprintln!("Usage: aacs-test <device> <keydb_path>");
|
||||
std::process::exit(1);
|
||||
}
|
||||
|
||||
let device = Path::new(&args[1]);
|
||||
let keydb_path = Path::new(&args[2]);
|
||||
|
||||
println!("aacs-test v{}", env!("CARGO_PKG_VERSION"));
|
||||
println!();
|
||||
|
||||
// Open drive
|
||||
print!("Opening {}... ", device.display());
|
||||
let mut session = match libfreemkv::DriveSession::open(device) {
|
||||
Ok(s) => { println!("OK"); s }
|
||||
Err(e) => { println!("FAILED: {}", e); std::process::exit(1); }
|
||||
};
|
||||
println!(" Drive: {} {}", session.profile.drive_id.trim(), session.profile.chipset.name());
|
||||
|
||||
// Load KEYDB
|
||||
print!("Loading KEYDB... ");
|
||||
let keydb = match libfreemkv::aacs::KeyDb::load(keydb_path) {
|
||||
Ok(db) => {
|
||||
println!("OK ({} disc entries, {} DK, {} PK)",
|
||||
db.disc_entries.len(), db.device_keys.len(), db.processing_keys.len());
|
||||
db
|
||||
}
|
||||
Err(e) => { println!("FAILED: {}", e); std::process::exit(1); }
|
||||
};
|
||||
|
||||
let host_cert = match &keydb.host_cert {
|
||||
Some(hc) => {
|
||||
println!(" Host cert: {} bytes, priv_key[0]=0x{:02x}",
|
||||
hc.certificate.len(), hc.private_key[0]);
|
||||
hc
|
||||
}
|
||||
None => { println!(" No host cert in KEYDB"); std::process::exit(1); }
|
||||
};
|
||||
|
||||
// AACS handshake
|
||||
println!();
|
||||
print!("AACS authenticate... ");
|
||||
let mut auth = match libfreemkv::aacs_handshake::aacs_authenticate(
|
||||
&mut session,
|
||||
&host_cert.private_key,
|
||||
&host_cert.certificate,
|
||||
) {
|
||||
Ok(a) => {
|
||||
println!("OK");
|
||||
println!(" Bus key: {:02x?}", &a.bus_key);
|
||||
println!(" AGID: {}", a.agid);
|
||||
println!(" Drive cert type: 0x{:02x}", a.drive_cert[0]);
|
||||
a
|
||||
}
|
||||
Err(e) => {
|
||||
println!("FAILED: {}", e);
|
||||
std::process::exit(1);
|
||||
}
|
||||
};
|
||||
|
||||
// Read Volume ID
|
||||
print!("Reading Volume ID... ");
|
||||
match libfreemkv::aacs_handshake::read_volume_id(&mut session, &mut auth) {
|
||||
Ok(vid) => {
|
||||
println!("OK");
|
||||
println!(" VID: {:02x?}", vid);
|
||||
|
||||
// Try to find matching disc in KEYDB
|
||||
let matched = keydb.disc_entries.values()
|
||||
.find(|e| e.disc_id == Some(vid));
|
||||
if let Some(entry) = matched {
|
||||
println!(" KEYDB match: {} (hash {})", entry.title, entry.disc_hash);
|
||||
if let Some(vuk) = entry.vuk {
|
||||
println!(" VUK: {:02x?}", vuk);
|
||||
}
|
||||
} else {
|
||||
println!(" No exact VID match in KEYDB");
|
||||
}
|
||||
}
|
||||
Err(e) => println!("FAILED: {}", e),
|
||||
}
|
||||
|
||||
// Read data keys (AACS 2.0)
|
||||
print!("Reading data keys... ");
|
||||
match libfreemkv::aacs_handshake::read_data_keys(&mut session, &mut auth) {
|
||||
Ok((rdk, wdk)) => {
|
||||
println!("OK (AACS 2.0 bus encryption)");
|
||||
println!(" Read data key: {:02x?}", rdk);
|
||||
println!(" Write data key: {:02x?}", wdk);
|
||||
}
|
||||
Err(e) => println!("not available: {} (likely AACS 1.0)", e),
|
||||
}
|
||||
|
||||
println!();
|
||||
println!("Done.");
|
||||
}
|
||||
+32
-55
@@ -384,7 +384,7 @@ impl Disc {
|
||||
session: &mut DriveSession,
|
||||
keydb_path: &std::path::Path,
|
||||
) -> Result<AacsState> {
|
||||
use crate::aacs::{KeyDb, derive_vuk, decrypt_unit_key};
|
||||
use crate::aacs::{self, KeyDb};
|
||||
use crate::aacs_handshake;
|
||||
|
||||
// Load KEYDB
|
||||
@@ -396,76 +396,53 @@ impl Disc {
|
||||
detail: "no host certificate in KEYDB".into(),
|
||||
})?;
|
||||
|
||||
// Authenticate with drive
|
||||
// Step 1: SCSI handshake → bus key + Volume ID
|
||||
let mut auth = aacs_handshake::aacs_authenticate(
|
||||
session,
|
||||
&host_cert.private_key,
|
||||
&host_cert.certificate,
|
||||
)?;
|
||||
|
||||
// Read Volume ID
|
||||
let vid = aacs_handshake::read_volume_id(session, &mut auth)?;
|
||||
|
||||
// Try to read data keys (AACS 2.0)
|
||||
let (read_data_key, bus_encryption) = match aacs_handshake::read_data_keys(session, &mut auth) {
|
||||
Ok((rdk, _wdk)) => (Some(rdk), true),
|
||||
Err(_) => (None, false),
|
||||
// Try to read data keys (AACS 2.0 bus encryption)
|
||||
let read_data_key = match aacs_handshake::read_data_keys(session, &mut auth) {
|
||||
Ok((rdk, _wdk)) => Some(rdk),
|
||||
Err(_) => None,
|
||||
};
|
||||
|
||||
// Compute disc hash (SHA1 of Unit_Key_RO.inf) for KEYDB lookup
|
||||
// First try: look up by VID-derived entries
|
||||
// The KEYDB has entries indexed by disc_hash, but we can also
|
||||
// find entries that match our MK+VID combination
|
||||
// Step 2: Read Unit_Key_RO.inf from disc via UDF
|
||||
let udf_fs = udf::read_filesystem(session)?;
|
||||
let uk_ro_data = udf_fs.read_file(session, "/AACS/Unit_Key_RO.inf")
|
||||
.or_else(|_| udf_fs.read_file(session, "/AACS/DUPLICATE/Unit_Key_RO.inf"))
|
||||
.map_err(|_| Error::AacsError {
|
||||
detail: "failed to read Unit_Key_RO.inf from disc".into(),
|
||||
})?;
|
||||
|
||||
// Try all entries — find one whose MK+VID produces a VUK that decrypts unit keys
|
||||
let mut found_vuk = None;
|
||||
// Step 3: Read Content Certificate (optional — for AACS version detection)
|
||||
let cc_data = udf_fs.read_file(session, "/AACS/Content000.cer")
|
||||
.or_else(|_| udf_fs.read_file(session, "/AACS/Content001.cer"))
|
||||
.ok();
|
||||
|
||||
// First: try entries that have a disc_id matching our VID
|
||||
for entry in keydb.disc_entries.values() {
|
||||
if let (Some(mk), Some(did)) = (entry.media_key, entry.disc_id) {
|
||||
if did == vid {
|
||||
let vuk = derive_vuk(&mk, &vid);
|
||||
found_vuk = Some((vuk, entry.unit_keys.clone()));
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Fallback: if we have a VUK that works, use it
|
||||
if found_vuk.is_none() {
|
||||
for entry in keydb.disc_entries.values() {
|
||||
if let Some(vuk) = entry.vuk {
|
||||
if let (Some(mk), Some(did)) = (entry.media_key, entry.disc_id) {
|
||||
if did == vid {
|
||||
found_vuk = Some((vuk, entry.unit_keys.clone()));
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let (vuk, keydb_unit_keys) = found_vuk.ok_or_else(|| Error::AacsError {
|
||||
detail: format!("no matching disc found in KEYDB for VID {:02x?}", &vid[..4]),
|
||||
// Step 4: Resolve all keys via the full chain
|
||||
// Path 1: disc hash → KEYDB → VUK (fast, 99% of discs)
|
||||
// Path 2: KEYDB media key + VID → VUK
|
||||
// Path 3: MKB + processing keys → media key → VUK (fallback)
|
||||
let resolved = aacs::resolve_keys(
|
||||
&uk_ro_data,
|
||||
cc_data.as_deref(),
|
||||
&vid,
|
||||
&keydb,
|
||||
None, // MKB: TODO read via REPORT DISC STRUCTURE 0x83
|
||||
).ok_or_else(|| Error::AacsError {
|
||||
detail: "failed to resolve AACS keys".into(),
|
||||
})?;
|
||||
|
||||
// If KEYDB has pre-decrypted unit keys, use them directly
|
||||
// Otherwise we'd need to read Unit_Key_RO.inf and decrypt with VUK
|
||||
let unit_keys = if !keydb_unit_keys.is_empty() {
|
||||
keydb_unit_keys
|
||||
} else {
|
||||
// Would need to read AACS/Unit_Key_RO.inf from disc and decrypt
|
||||
// For now, require KEYDB to have unit keys
|
||||
return Err(Error::AacsError {
|
||||
detail: "no unit keys in KEYDB entry — Unit_Key_RO.inf parsing not yet implemented".into(),
|
||||
});
|
||||
};
|
||||
|
||||
Ok(AacsState {
|
||||
vuk,
|
||||
unit_keys,
|
||||
vuk: resolved.vuk,
|
||||
unit_keys: resolved.unit_keys,
|
||||
read_data_key,
|
||||
bus_encryption,
|
||||
bus_encryption: resolved.bus_encryption,
|
||||
})
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user