Robert Allan JamesandClaude Sonnet 5
f4615cf605
is_member() (fail-closed) and add() (idempotent, chains new devblocks onto the tail as needed) over the item-17 eligibility-list devblock chain, mirroring capsule_zuse_boot.c's magic/version/CRC-64 validation convention. No callers yet. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QgooKd5hJNtTYqB6CyK5f9
57 lines
2.1 KiB
C
57 lines
2.1 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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Licensed under the StarForth License, Version 1.0
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*/
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/**
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* zuse_eligibility.h - Read/add/membership-check over the on-disk
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* elevation eligibility list (FABRIC-3.md §H.5/§H.12 Phase 6,
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* zuse_eligibility_list.h's zuse_eligibility_devblock_t chain). Zuse
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* checks zuse_eligibility_is_member() before honoring any
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* ELEVATE-REQUEST (§H.7/§H.8) -- a gating layer on top of the
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* message-based elevation trigger, not a replacement for it. Adding an
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* entry (zuse_eligibility_add()) is meant to be reachable only from a
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* Zuse-only FORTH word (§H.12 item 19, gated by zuse_session), not
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* called directly from arbitrary session code.
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*/
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#ifndef STARKERNEL_ZUSE_ELIGIBILITY_H
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#define STARKERNEL_ZUSE_ELIGIBILITY_H
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#ifdef __STARKERNEL__
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#include <stdint.h>
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/**
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* zuse_eligibility_is_member - Check whether pubkey appears anywhere in
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* the eligibility list chain. Fail-closed: an empty/nonexistent list, a
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* corrupt/foreign devblock encountered mid-chain, or any I/O error all
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* read as "not eligible" (0), never "eligible" -- this gates elevation,
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* so an unreadable list must never be treated as permissive.
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*
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* @param pubkey 32-byte Ed25519 public key to look up.
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* @return 1 if found, 0 otherwise (including on any error).
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*/
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int zuse_eligibility_is_member(const uint8_t pubkey[32]);
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/**
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* zuse_eligibility_add - Add pubkey to the eligibility list, creating
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* the list's head devblock if it doesn't exist yet and chaining a fresh
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* devblock onto the tail if the current tail is full. Idempotent: adding
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* an already-present pubkey is a no-op success, not a duplicate entry.
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*
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* @param pubkey 32-byte Ed25519 public key to add.
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* @return 0 on success (added, or already present), -1 on
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* failure (fence write failed, fence budget exhausted, or
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* a corrupt devblock was encountered mid-chain).
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*/
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int zuse_eligibility_add(const uint8_t pubkey[32]);
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#endif /* __STARKERNEL__ */
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#endif /* STARKERNEL_ZUSE_ELIGIBILITY_H */
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