Robert Allan JamesandClaude Sonnet 5
c07184e984
Phase A of the identity pipeline (FABRIC-3.md §F.2/§F.16, §F.13):
- New include/starkernel/vm_identity.h: VMIdentity{owner_pubkey[32],
installed, acl_caps}, its own header per the project's "give real-shaped
data its own header" convention (VMUuid's own precedent), embedded by
value on struct VM. acl_caps is an independent capability bitmask, not
an ordered privilege tier (decided 2026-08-28) -- Zuse isn't a
structurally special VM, her identity just has every bit set
(VM_IDENTITY_CAP_ALL). No individual capability bits assigned yet,
deliberate slack matching blk_meta_t's own acl_reserved precedent --
real bits get names once the operation they gate (BINDSTEP, MINT, ...)
actually gets built.
- Applied the devblock-1 relocation decided in §F.13: new
HOMEBLOCKS_SIG_START_FBLOCK constant (homeblocks_sig.h), repl.c's
homeblocks_sig_check() call site updated from the literal 0. Also
applied the still-owed blockmap_offset/blockmap_devblocks ->
identity_src_offset/identity_src_devblocks rename decided in §F.6 (no
other code referenced the old names). Updated the header's own stale
GPT-relative doc comments to match -- GPT was dropped permanently, this
location is final, not an interim stand-in.
Verified live on all three architectures: clean compile, clean boot to
ok>, Hermes/Artemis both confirmed live with no KILL (no regression from
last session's session-less fix). One pre-existing, unrelated anomaly
observed consistently on all three arches, not caused by this change (no
code touched here intersects Zuse's own fence-write path): "Zuse: minted
but fence write FAILED (not persistent)" -- flagged for its own
investigation, not chased here.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019ZGkimpfyh63EZyRkNbkPD
91 lines
3.9 KiB
C
91 lines
3.9 KiB
C
/*
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* vm_identity.h - Per-VM owner identity + ACL capabilities (FABRIC-3.md
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* §F.2/§F.16, decided 2026-08-27/28)
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*
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* Holds only what a VM needs to prove *who owns it* and *what that owner
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* is allowed to do* -- never a private key. A regular VM's lock never
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* signs anything itself, so no seed/private material belongs here at all
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* (unlike Zuse's own zuse_cert_seed/zuse_cert_pubkey pair, which does need
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* one because she actively signs). Deliberately its own header rather
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* than inline fields on struct VM, mirroring VMUuid's own precedent
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* (vm_uuid.h) -- standing instruction: give real-shaped data its own
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* header and integrate as a field, don't grow struct VM ad hoc.
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*
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* acl_caps is a capability bitmask, not an ordered privilege tier
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* (decided 2026-08-28) -- independent bits, not a nested hierarchy. Zuse
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* is not a structurally special VM: her identity just has every bit set.
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* No bit values are assigned yet -- deliberate slack, per this project's
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* "flexibility until we understand the recipe" precedent (see
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* blk_meta_t's own acl_reserved bytes, FABRIC-3.md §F.4) -- real bits get
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* names only once the operation they gate actually gets built (BINDSTEP,
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* MINT, ...), not speculatively here.
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*/
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#ifndef STARKERNEL_VM_IDENTITY_H
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#define STARKERNEL_VM_IDENTITY_H
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#ifdef __STARKERNEL__
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#include <stdint.h>
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typedef struct {
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uint8_t owner_pubkey[32]; /**< Ed25519 public key of this VM's owning
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* identity. Meaningless unless installed
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* is set. */
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uint8_t installed; /**< 0 = no identity installed yet (e.g.
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* Hera/Hermes/Artemis today, before
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* D.5's per-VM-identity work lands) --
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* BINDSTEP-style checks must treat this
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* as "no lock, allow freely," matching
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* §F.9 decision 2. 1 = owner_pubkey/
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* acl_caps are real. */
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uint32_t acl_caps; /**< Capability bitmask. All-zero until a
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* real caller defines and checks a bit;
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* VM_IDENTITY_CAP_ALL for Zuse's own
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* identity ("her ACL just grants
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* everything," not a special VM type). */
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} VMIdentity;
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/** Every capability bit set -- Zuse's own identity uses this, not a
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* distinct "is this Zuse" flag anywhere else in the system. */
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#define VM_IDENTITY_CAP_ALL 0xFFFFFFFFu
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/**
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* vm_identity_has_cap - Check whether an installed identity holds a
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* capability. Returns 0 (denied) if identity isn't installed at all --
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* callers that mean "no lock, allow freely" (§F.9 decision 2) must check
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* installed themselves first, not call this and treat 0 as a denial in
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* that case.
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*
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* @param id Identity to check.
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* @param cap A single capability bit (or bits) to test for.
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* @return Non-zero if id is installed and every bit in cap is set.
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*/
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int vm_identity_has_cap(const VMIdentity *id, uint32_t cap);
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#endif /* __STARKERNEL__ */
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#endif /* STARKERNEL_VM_IDENTITY_H */
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