feat: update plan 16 sec14-26

2026-07-07 15:46:36 +09:00
parent 0c60ed33e9
commit ae4fc7112c
64 changed files with 2231 additions and 116 deletions
@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -uo pipefail
+
+# CASAN Plan-16 SEC-23 (23.10, MT-02) — per-tenant encryption at rest (local-key MVP).
+#
+# Sensitive state (audit / telemetry) is encrypted with a PER-TENANT key so tenant B
+# — or an admin of B — cannot read tenant A's plaintext on disk. The key lives under
+# the tenant partition (0600) and differs per tenant, so a ciphertext produced by A
+# cannot be decrypted with B's key. Production form uses Vault Transit (23.11, needs
+# infra); this is the offline form.
+#
+# Usage:
+#   tenant-crypt.sh encrypt <plaintext-file> <ciphertext-file>
+#   tenant-crypt.sh decrypt <ciphertext-file> <plaintext-file>
+# Env: CASAN_TENANT_ID (key is tenant-specific; prod requires it — tenant-store).
+# Exit: 0 ok · 2 crypto failure (e.g. wrong tenant key) · 3 tenant/key/openssl error · 64 usage.
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+TS="$SCRIPT_DIR/tenant-store.sh"
+
+CMD="${1:-}"; IN="${2:-}"; OUT="${3:-}"
+command -v openssl >/dev/null 2>&1 || { echo "TENANT_CRYPT_OPENSSL_UNAVAILABLE" >&2; exit 3; }
+[[ -n "$CMD" && -n "$IN" && -n "$OUT" ]] || { echo "usage: tenant-crypt.sh {encrypt|decrypt} <in> <out>" >&2; exit 64; }
+[[ -f "$IN" ]] || { echo "TENANT_CRYPT_INPUT_MISSING file=$IN" >&2; exit 3; }
+
+# Per-tenant key (created once, 0600). tenant-store fails closed on an invalid/missing
+# tenant in prod; in dev it resolves under the 'default' tenant.
+KEYFILE="$(bash "$TS" resolve keys/at-rest.key 2>/dev/null)" || { echo "TENANT_CRYPT_DENIED (tenant unresolved)" >&2; exit 3; }
+if [[ ! -f "$KEYFILE" ]]; then
+  openssl rand -base64 48 > "$KEYFILE" 2>/dev/null || { echo "TENANT_CRYPT_KEYGEN_FAILED" >&2; exit 3; }
+  chmod 600 "$KEYFILE" 2>/dev/null || true
+fi
+
+case "$CMD" in
+  encrypt)
+    if openssl enc -aes-256-cbc -pbkdf2 -salt -in "$IN" -out "$OUT" -pass "file:$KEYFILE" 2>/dev/null; then
+      echo "TENANT_ENCRYPTED out=$OUT"
+      exit 0
+    fi
+    echo "TENANT_ENCRYPT_FAILED" >&2; exit 2
+    ;;
+  decrypt)
+    if openssl enc -d -aes-256-cbc -pbkdf2 -in "$IN" -out "$OUT" -pass "file:$KEYFILE" 2>/dev/null; then
+      echo "TENANT_DECRYPTED out=$OUT"
+      exit 0
+    fi
+    rm -f "$OUT" 2>/dev/null || true
+    echo "TENANT_DECRYPT_FAILED (wrong tenant key or corrupt ciphertext)" >&2; exit 2
+    ;;
+  *)
+    echo "Usage: tenant-crypt.sh {encrypt|decrypt} <in> <out>" >&2
+    exit 64
+    ;;
+esac