Seal the four credential columns with AES-256-GCM (random nonce per value,
AAD "<table>.<column>"): llm_profiles.api_key and task_credentials.password
store "enc:v1:<base64(nonce||ciphertext)>"; mcp_servers.env and
notification_channels.config store {"__artex_enc":"enc:v1:..."} over the
canonical JSON. The db layer encrypts on write and decrypts on read, so agent
tools (LLM provider, MCP, notifier, test credentials) get plaintext
server-side. Decryption failure is an error, never a plaintext fallback.
Key: ARTEX_SECRET_KEY (32 bytes, base64 or hex) or keys/secret.key next to
jwt.key, generated with crypto/rand at first start (0600). Startup refuses
when encrypted values exist and no key is available, and when the key does
not decrypt them. An idempotent backfill under the schema advisory lock
encrypts legacy plaintext rows and logs only a count.
API: MCP env is masked on read and masked placeholders on write keep the
stored value; task credential passwords are masked server-side and a masked
password on write is refused. ARTEX_SECRET_KEY is scrubbed from the process
environment with the other startup secrets.
BaaRai
07cc87c1a3