Files
vm-cc/40-rules/ledger_hash_chain_intact.sh
2025-12-27 00:59:13 +00:00

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#!/usr/bin/env bash
set -euo pipefail
source "$(dirname "$0")/../scripts/lib/common.sh"
require_cmd jq
EVID_DIR="${1:?usage: ledger_hash_chain_intact.sh <evidence_dir>}"
TS="$(iso_utc_now)"
FILE="$EVID_DIR/ledger_verify.json"
if [[ ! -f "$FILE" ]]; then
json_emit "$(jq -n --arg ts "$TS" '{
version:"1.0.0",
rule_id:"ledger.hash_chain_intact",
control_ids:["AU-01","AU-02"],
passed:false,
severity:"CRITICAL",
timestamp:$ts,
evidence:[{path:"ledger_verify.json"}],
details:{error:"missing evidence file"}
}')"
exit 0
fi
COLLECTED="$(jq -r '.collected // true' "$FILE")"
if [[ "$COLLECTED" != "true" ]]; then
json_emit "$(jq -n --arg ts "$TS" '{
version:"1.0.0",
rule_id:"ledger.hash_chain_intact",
control_ids:["AU-01","AU-02"],
passed:false,
severity:"CRITICAL",
timestamp:$ts,
evidence:[{path:"ledger_verify.json"}],
details:{error:"ledger verify not collected"}
}')"
exit 0
fi
OK="$(jq -r '.ok // false' "$FILE")"
ENTRY_COUNT="$(jq -r '.entry_count // 0' "$FILE")"
FAILURES_JSON="$(jq -c '.failures // []' "$FILE")"
if [[ "$OK" == "true" ]]; then
json_emit "$(jq -n --arg ts "$TS" --argjson count "$ENTRY_COUNT" '{
version:"1.0.0",
rule_id:"ledger.hash_chain_intact",
control_ids:["AU-01","AU-02"],
passed:true,
severity:"CRITICAL",
timestamp:$ts,
evidence:[{path:"ledger_verify.json"}],
details:{entries_checked:$count}
}')"
else
json_emit "$(jq -n --arg ts "$TS" --argjson count "$ENTRY_COUNT" --argjson failures "$FAILURES_JSON" '{
version:"1.0.0",
rule_id:"ledger.hash_chain_intact",
control_ids:["AU-01","AU-02"],
passed:false,
severity:"CRITICAL",
timestamp:$ts,
evidence:[{path:"ledger_verify.json"}],
details:{entries_checked:$count, failures:$failures}
}')"
fi