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docs(spec): appboot Response を key 33.6 / 33.9 に分解

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appboot Response key 33 を Server DH PubKey と省略していた問題を修正。
key 33.6 (Server DH Response 96B) と key 33.9 (Server nonce 16B) に分離。

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
tkgstrator
2026-04-09 02:07:59 +00:00
co-authored by Claude Opus 4.6
parent cb5483e8ac
commit a7d9efdfd4
1 changed files with 9 additions and 5 deletions
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docs/spec/msl_key_relationship.md
+9 -5
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@@ -51,16 +51,20 @@ graph LR
KEY336_PT --> OP_XOR
OP_XOR --> KEY336_ENC["key 33.6 ciphertext"]
KEY336_ENC -->|POST /appboot| SERVER["Netflix Server"]
SERVER --> DH_RESP["appboot Response key 33"]
DH_RESP --> TO_P2b[/"to Phase 2"/]
ECC_BOOT["kAppBootEccKey P-256"] -.->|verify?| DH_RESP
SERVER --> RESP["appboot Response key 33"]
RESP --> RESP_6["key 33.6 Server DH Response 96B"]
RESP --> RESP_9["key 33.9 Server nonce 16B"]
RESP_6 --> TO_P2b[/"to Phase 2"/]
ECC_BOOT["kAppBootEccKey P-256"] -.->|verify?| RESP
style DH_P fill:#e74c3c,stroke:#c0392b,color:#fff
style DH_G fill:#e74c3c,stroke:#c0392b,color:#fff
style ECC_BOOT fill:#e74c3c,stroke:#c0392b,color:#fff
style NONCE_SRV fill:#2ecc71,stroke:#27ae60,color:#fff
style SERVER fill:#3498db,stroke:#2980b9,color:#fff
style DH_RESP fill:#3498db,stroke:#2980b9,color:#fff
style RESP fill:#3498db,stroke:#2980b9,color:#fff
style RESP_6 fill:#3498db,stroke:#2980b9,color:#fff
style RESP_9 fill:#3498db,stroke:#2980b9,color:#fff
style DH_PUB fill:#2ecc71,stroke:#27ae60,color:#fff
style DH_PRIV fill:#2ecc71,stroke:#27ae60,color:#fff
style TO_P2a fill:#555,stroke:#333,color:#fff
@@ -80,7 +84,7 @@ graph LR
```mermaid
graph LR
FROM_P1a[/"from Phase 1: Server DH PubKey"/] --> OP_DH(["DH_compute_key"])
FROM_P1a[/"from Phase 1: key 33.6 Server DH Response"/] --> OP_DH(["DH_compute_key"])
FROM_P1b[/"from Phase 1: Client DH PrivKey"/] --> OP_DH
OP_DH --> DH_SHARED["DH Shared Secret 1024-bit"]
FROM_P3[/"from Phase 3: session_bind upper 16B"/] --> OP_SHA2(["SHA384"])