Robert Allan JamesandClaude Sonnet 5
cc9521d2cc
Three tightly-coupled changes, verified together per Captain Bob's own "getting rid of the emergency cli" direction: 1. Zuse's identity is thumbdrive-resident, never system-resident. New zuse_genesis_marker_t (magic/version/zuse_pubkey[32]/crc) replaces zuse_cert_devblock_t's slot in the top-of-device fence -- the system now remembers only that a root identity exists and its pubkey, never a seed. zuse_cert_devblock_t is kept in the repo, marked superseded, no longer written by any code path. capsule_mint_identity() grows a genesis mode (issuer_vm=NULL): no cert is built or written (Zuse isn't verified against a separate signer -- she's recognized by pubkey match against the marker) and two new optional out-params (out_pubkey/out_seed) let the caller install the cert immediately after a genesis mint. New capsule_zuse_boot_try_attach() (capsule_zuse_boot.c), called from sk_repl_idle() on every fresh USB attach (the only point in the boot lifecycle a thumbdrive can actually be detected -- attach polling doesn't exist yet at kernel_main.c's old one-shot mint point, which is why that whole block is gone): no marker + blank drive -> genesis-mint; marker present + matching drive -> read its own user_identity_seed_t, install the cert. Either way, re-runs ACL-ZUSE-BOOT (zuse.4th) so zuse_session activates exactly like it always has for a same-boot cert install -- ACL-PIN only blocks redefinition, not re-execution, so no new C-side auth logic needed. 2. ACL.4th activated (capsules/init.4th) -- inactive all session until now. Found and fixed a real bug this immediately surfaced: zuse.4th's ACL-ZUSE-BOOT tried `['] ACL-ZUSE-BOOT ACL-PIN` from inside its own still-compiling definition -- the word isn't findable yet at that point, so the whole definition silently failed to compile every previous boot this session (dormant, since ACL.4th never loaded). Fixed: pin after the definition closes, not from within it -- it only needs to happen once anyway, and pinning doesn't block the re-invocation genesis/attach needs. 3. The unauthenticated emergency-CLI ACL bypass is retired (repl.c): `emergency_console = is_hera ? (zuse_session ? 0 : 1) : 0` deleted from both sk_repl_step and sk_repl_run. Every word run from Hera's own bare prompt now goes through ordinary ACL enforcement; emergency_console is driven only by the genuine C-level fault handler again. Added ZUSE-SESSION? (starforth_words.c), a read-only diagnostic matching ZUSE-PUBKEY@'s own precedent, to verify the whole chain directly rather than by inference. Verified end-to-end live in QEMU: fresh boot, no thumbdrive -> ZUSE-SESSION? reads 0. Attach a genuinely blank drive via QMP -> genesis mint fires automatically (no typing) -> ZUSE-SESSION? reads -1 (true). Hermes/Artemis both birth clean on all three architectures with ACL now actually enforced for the first time all session -- no denials, no UNKNOWN WORD beyond the deliberate POST self-test cases. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019ZGkimpfyh63EZyRkNbkPD
60 lines
2.9 KiB
C
60 lines
2.9 KiB
C
/*
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* zuse_cert_devblock.h -- SUPERSEDED 2026-08-28 (FABRIC-3.md §F.20/§F.21).
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* Zuse is now thumbdrive-resident, not system-resident: her seed lives
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* only on her own minted thumbdrive, never written to the fence. The
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* fence's devblock_from_top=0 slot this type used to occupy now holds
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* zuse_genesis_marker_t (zuse_genesis_marker.h) instead -- pubkey only,
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* no seed. This type is no longer written by any code path; kept in the
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* repo as historical record of the format it replaced, per this
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* project's own convention for superseded design (see e.g. the
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* TRIPOD.md/HERMES.md/ARTEMIS.md/CONSOLE.md superseded-header pattern).
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* Do not resurrect writes to this format.
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*
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* Original doc, kept for context:
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*
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* on-disk record format for Zuse's cert, stored
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* in devblock_from_top=0 of the top-of-device system-metadata fence
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* (block_subsystem.h's blk_meta_zone_read()/write(), Phase 8, FABRIC-3.md
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* §C). Raw, unpacked 4 KiB devblock -- same convention as the volume
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* header itself (magic + version + fields + pad-to-4096, real CRC from
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* day one, matching homeblocks_sig_t's own precedent for exactly this
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* reason: this gates a real security check, not a placeholder).
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*
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* Deliberately its own header, not inlined at the one call site that
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* uses it today (kernel_main.c's first-boot mint-or-load): the ongoing
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* `MINT` word (still open, FABRIC-3.md) will be a second consumer of
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* this exact format later, and the format should be stable and
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* documented once rather than ad-hoc.
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*/
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#ifndef STARKERNEL_ZUSE_CERT_DEVBLOCK_H
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#define STARKERNEL_ZUSE_CERT_DEVBLOCK_H
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#include <stdint.h>
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/* Packed via shifts, not a hand-computed hex literal -- this project's
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* own standing lesson about hand-derived numeric constants in this
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* class of code (see FABRIC-3.md's Ed25519/scalar25519 writeups). */
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#define ZUSE_CERT_DEVBLOCK_MAGIC \
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((uint32_t)'Z' | ((uint32_t)'U' << 8) | ((uint32_t)'S' << 16) | ((uint32_t)'E' << 24))
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#define ZUSE_CERT_DEVBLOCK_VERSION 1u
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typedef struct {
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uint32_t magic; /* ZUSE_CERT_DEVBLOCK_MAGIC; anything else means
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* "not a real cert yet" (blank/foreign bytes),
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* not a format-corruption error */
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uint32_t version; /* ZUSE_CERT_DEVBLOCK_VERSION */
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uint8_t seed[32]; /* Ed25519 seed -- the private identity */
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uint8_t pubkey[32]; /* Ed25519 public key derived from seed at mint time */
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uint64_t crc; /* CRC-64/ISO (block_subsystem.h's compute_crc64())
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* over every byte of this struct up to (not
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* including) this field -- real from day one,
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* this gates a real security check */
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uint8_t _pad[4096 - (4 + 4 + 32 + 32 + 8)];
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} zuse_cert_devblock_t;
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_Static_assert(sizeof(zuse_cert_devblock_t) == 4096,
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"zuse_cert_devblock_t must be exactly one 4 KiB devblock");
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#endif /* STARKERNEL_ZUSE_CERT_DEVBLOCK_H */
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