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imSp4rky
3027592e31
Vaults.add_keys and kv add skip null content keys instead of failing the batch; is_null_key moves to core.vault. A manifest snapshot restore has one 32 MiB inflate budget. Tests reset the speed limiter and config between runs.
65 lines
3.2 KiB
Markdown
65 lines
3.2 KiB
Markdown
# Key vaults { #key-vaults }
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The full guide is at [Vaults](../../guide/vaults.md). Two keys configure them.
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## `key_vaults`
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- **Type:** `list[dict]` · **Default:** `[]`
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An ordered list of key-vault backends. unshackle queries them in order and reuses the
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content keys instead of licensing them again. Each entry needs a `type` (the backend module
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name) and a `name`, plus backend-specific keys.
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| `type` | Purpose | Required keys | Notes |
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|--------|---------|--------------|-------|
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| `SQLite` | Local SQLite database | `name`, `path` | Loaded **critically**; a failure aborts the run. |
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| `MySQL` | Remote MySQL database | `name`, `host`, `database`, `username` | Extra keys (e.g. `password`, `port`) forwarded to pymysql. `connect_timeout` defaults to `vault_timeout`. |
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| `API` | RESTful JSON API | `name`, `uri`, `token` | Optional `headers` map is sent with every request. Honours `vault_timeout`. |
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| `HTTP` | HTTP API with modes | `name`, `host`, one of `password`/`api_key`, and `username` in query mode | `api_mode`: `query` (default), `json`, `decrypt_labs`. Honours `vault_timeout`. |
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```yaml
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key_vaults:
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- type: SQLite
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name: Local
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path: ~/.unshackle/keys.db
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- type: MySQL
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name: Team
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host: db.example.com
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database: keys
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username: unshackle
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password: hunter2
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no_push: false
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```
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!!! note "Per-entry options"
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- `no_push: true` makes a vault read-only (unshackle fetches content keys from it but never writes to it).
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- A vault of `type: API` whose `name` contains `decrypt_labs` auto-fills its `token` from
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[`decrypt_labs_api_key`](misc.md#external-api-keys) when not set inline. Vault `type` values are
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case-sensitive module names.
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- unshackle treats an empty or all-zero content key, of any length, as "no key" everywhere
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and never stores it.
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!!! note "Bad content keys"
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A content key from a vault is proven by short FFmpeg decodes of the decrypted output,
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with windows inside the fragments of each KID in a fragmented MP4. A content key that
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fails the decode is written to the `bad_keys` table of every `SQLite` vault with the name
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of the vault that supplied it, and every vault lookup skips a flagged pair from then on. A `SQLite` vault also refuses to
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store a flagged pair again. Only the `SQLite` backend stores flags; an `API` vault that
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supplied the pair gets a report. A `serve` instance with
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`server_cdm` flags a pair the same way when a remote client reports it, so a server whose
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`key_vaults` hold no `SQLite` entry cannot remember a bad content key.
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## `vault_timeout`
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- **Type:** `float` · **Default:** `10.0`
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Timeout in seconds for vault operations. Injected automatically into any backend whose
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constructor accepts a `timeout` parameter (a per-vault `timeout` still wins). The `MySQL` backend
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uses it as the default `connect_timeout`.
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The `API` and `HTTP` backends send a request again up to 3 times when the vault answers
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`429 Too Many Requests`. They wait the `Retry-After` time, but never longer than this timeout.
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A connection failure or a timeout is not tried again. The run does not use a vault again after a
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connection failure, a timeout, or a `429` that continues after the retries, so a vault that is
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down costs one timeout per run.
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