[CTX-0024] feat(pointer): pointer-online capability→encrypted object + offline 1024px+ - #34
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…+ offline 1024px+ - Server DB: message_objects table (id, capability_id FK, ciphertext BLOB, nonce, tag, content_key, created_at, policy) with capability_hash index and owner/allow authz (no IDOR) - Service: ChaCha20-Poly1305 (chacha20poly1305 0.11) aead_encrypt/decrypt with tag verify, store_message(ciphertext)->capability_id, encrypt_and_store, resolve_message with authz, store_offline/resolve_offline for 48B object_id+content_key (enforces 1024px+ at embed time) - Carrier: capglyph::pointer reuses capglyph_core framing (Pointer/Locator) + ECC (BCH/Repetition) + DCT/DWT differential; select_profile mirrors credential ladder; offline gate 1024 - CLI: capglyph pointer embed/extract/offline-embed/offline-extract + message encrypt/decrypt/store/resolve (cfg not wasm) - Tests: end-to-end encrypt→embed→extract→resolve→decrypt, IDOR negative, AEAD tamper, bearer, offline 1024 gate (pointer::tests::end_to_end_*) - HTTP: POST /v1/messages, POST /v1/messages/resolve, GET /v1/messages/:id - Docs: docs/pointer-and-stego.md - Wasm: pointer gated, getrandom wasm_js, cargo tree clean Closes CTX-0024
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CTX-0024 — Pointer-mode stego: image → capability → encrypted object
Track: capglyph-cli + capglyph-server (isolation: ../capglyph-core, ../vectomancy)
Pointer-online (default): 128-bit capability_id (CSPRNG) →
capglyph_core::framing(CBOR + HMAC, PayloadType::Pointer) → ECC (BCH t=3 for 512 DCT, Repetition8 for 1024+ / DWT) → carrier (DCT F[3,4] / DWT LH). Extract via soft LLR, HMAC verify, serverresolve(capability_id, actor_id)with authz (no IDOR) → ChaCha20-Poly1305 decrypt (tag verify). Shares same carrier/ECC stack as credential.Pointer-offline: object_id (UUID 16 B) + content_key (32 B) = 48 B → framing Locator → ECC → carrier, 1024px+ gate enforced at embed time (
offline pointer requires image at least 1024x1024). Store viastore_offline, extract →resolve_offline(object_id, content_key, actor_id)with same policy check.Server DB:
message_objects(id, capability_id FK, capability_hash, ciphertext BLOB, nonce 12 B, tag 16 B, content_key, created_at, policy JSON, owner_id, expires_at) + indexes. Service:store_message(ciphertext)->capability_id,encrypt_and_store,resolve_message+ authz,aead_encrypt/decrypt(tag verify), offline variants. HTTP:POST /v1/messages,POST /v1/messages/resolve.CLI:
capglyph pointer embed/extract/offline-embed/offline-extract+capglyph message encrypt/decrypt/store/resolve(cfg not wasm).Tests: end-to-end encrypt→embed→extract→resolve→decrypt, IDOR negative (owner vs bad actor → 403), bearer (no owner) succeeds, AEAD tag tamper fails, offline 512 correctly rejects, offline 1024 roundtrip. All existing
framed/integration/registrationstill pass. Wasm: pointer gated,getrandom wasm_js,cargo tree --target wasm32-unknown-unknown | grep clap|globclean.Closes CTX-0024