update first - 84

2026-06-30 02:21:39 +09:00
commit 07ac1bdcdd
561 changed files with 88164 additions and 0 deletions
@@ -0,0 +1,88 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Verify CASAN H5 append-only hash-chain audit log.
+# Usage:
+#   verify-audit-chain.sh [audit-jsonl]
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../../.." && pwd)"
+AUDIT_LOG="${1:-$PROJECT_ROOT/.specify/logs/audit/audit.jsonl}"
+
+if [[ ! -f "$AUDIT_LOG" ]]; then
+  echo "AUDIT_CHAIN_MISSING file=$AUDIT_LOG" >&2
+  exit 1
+fi
+
+COMPUTED_HEAD="$(python3 - "$AUDIT_LOG" <<'PY'
+import hashlib
+import json
+import sys
+
+path = sys.argv[1]
+previous = ""
+count = 0
+
+with open(path, encoding="utf-8") as f:
+    for line_no, line in enumerate(f, 1):
+        if not line.strip():
+            continue
+        record = json.loads(line)
+        expected_previous = record.get("previous_record_hash", "")
+        if expected_previous != previous:
+            raise SystemExit(
+                f"AUDIT_CHAIN_BROKEN line={line_no} expected_previous={previous} actual_previous={expected_previous}"
+            )
+
+        core = "|".join(
+            [
+                record.get("timestamp", ""),
+                record.get("trace_id", ""),
+                record.get("action", ""),
+                record.get("actor", ""),
+                record.get("risk_level", ""),
+                record.get("decision", ""),
+                record.get("approval_status", ""),
+                record.get("approver", ""),
+                record.get("input_hash", ""),
+                record.get("output_hash", ""),
+                expected_previous,
+            ]
+        )
+        expected_hash = hashlib.sha256(core.encode()).hexdigest()
+        actual_hash = record.get("record_hash", "")
+        if expected_hash != actual_hash:
+            raise SystemExit(
+                f"AUDIT_HASH_MISMATCH line={line_no} expected={expected_hash} actual={actual_hash}"
+            )
+        previous = actual_hash
+        count += 1
+
+# Emit count and head on stderr (human) and the head on stdout (captured).
+sys.stderr.write(f"AUDIT_CHAIN_INTEGRITY_OK records={count}\n")
+sys.stdout.write(previous)
+PY
+)"
+
+# --- External anchor verification ---
+# Recomputing a forged chain yields a different head; the stored head signature
+# was produced with a private key the forger does not have, so it will not match.
+AUDIT_DIR="$(dirname "$AUDIT_LOG")"
+HEAD_FILE="$AUDIT_DIR/audit-head.txt"
+HEAD_SIG="$AUDIT_DIR/audit-head.sig"
+AUDIT_PUB="$PROJECT_ROOT/.specify/level5/central-governance/audit-public.pem"
+
+if [[ -f "$HEAD_FILE" && -f "$HEAD_SIG" && -f "$AUDIT_PUB" ]] && command -v openssl >/dev/null 2>&1; then
+  STORED_HEAD="$(cat "$HEAD_FILE")"
+  if [[ "$STORED_HEAD" != "$COMPUTED_HEAD" ]]; then
+    echo "AUDIT_HEAD_MISMATCH computed=$COMPUTED_HEAD stored=$STORED_HEAD" >&2
+    exit 1
+  fi
+  if ! openssl dgst -sha256 -verify "$AUDIT_PUB" -signature "$HEAD_SIG" "$HEAD_FILE" >/dev/null 2>&1; then
+    echo "AUDIT_HEAD_SIGNATURE_INVALID head=$COMPUTED_HEAD" >&2
+    exit 1
+  fi
+  echo "AUDIT_CHAIN_VALID anchor=signed last_hash=$COMPUTED_HEAD"
+else
+  echo "AUDIT_CHAIN_VALID anchor=unsigned last_hash=$COMPUTED_HEAD"
+fi