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Zhengchao An
88 lines
3.1 KiB
Markdown
88 lines
3.1 KiB
Markdown
# KMS Crate Instructions
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Applies to `crates/kms/`.
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## Change Coordination
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When changing key-management behavior, verify compatibility with:
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- `rustfs/src/storage/ecfs.rs`
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- `rustfs/src/admin/handlers/kms.rs`
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- `rustfs/src/admin/handlers/kms_dynamic.rs`
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- `rustfs/src/admin/handlers/kms_keys.rs`
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- `rustfs/src/admin/handlers/kms_management.rs`
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## Security
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- Never log plaintext keys, key material, or sensitive request payloads.
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- Prefer explicit error propagation over panic paths.
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## Testing
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For local KMS end-to-end tests, keep proxy bypass settings:
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```bash
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NO_PROXY=127.0.0.1,localhost HTTP_PROXY= HTTPS_PROXY= http_proxy= https_proxy= \
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cargo test --package e2e_test test_local_kms_end_to_end -- --nocapture --test-threads=1
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```
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### Black-box behavior suite and the Vault lane
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`crates/kms/tests/behavior_*.rs` drive the crate through its public entry
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points only. By default they run against the Local and Static backends.
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Setting `RUSTFS_KMS_VAULT_TOKEN` adds the Vault KV2 and Vault Transit backends
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to every `for_each_backend` spec, against a live server
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(`RUSTFS_KMS_VAULT_ADDR`, default `http://127.0.0.1:8200`):
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```bash
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NO_PROXY=127.0.0.1,localhost HTTP_PROXY= HTTPS_PROXY= http_proxy= https_proxy= \
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RUSTFS_KMS_VAULT_TOKEN=<dev-token> cargo test -p rustfs-kms
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```
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The server needs a KV v2 engine at `secret/` and a Transit engine at
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`transit/`, matching the crate's config defaults.
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**Run the Vault lane whenever you touch rotation or versioning.** `rotate` and
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`versioning` are advertised only by the Vault backends, so without it every
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capability-gated branch for them takes the `UnsupportedCapability` side and
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`behavior_rotation.rs` never asserts the working half — a rotation that dropped
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prior key versions would go green.
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The lane creates real keys under unique names (`behavior-kv2-*`,
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`behavior-transit-*`) and does not remove them, so a dev Vault accumulates them
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across runs. On a dev server, remove only exact keys confirmed to belong to the
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current task. A shared prefix does not prove ownership; preserve another run's
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keys and leave ambiguous keys for the operator.
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```bash
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vault write transit/keys/<task-owned-transit-key>/config deletion_allowed=true
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vault delete transit/keys/<task-owned-transit-key>
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```
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```bash
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vault kv metadata delete secret/rustfs/kms/keys/<task-owned-kv2-key>
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```
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## Local Key Export for SSE-S3 Migration Tests
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Use the read-only `local_kms_key_decrypt` example to export an AES-256 Local
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KMS key as the base64 value expected by `RUSTFS_SSE_S3_MASTER_KEY`:
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```bash
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export RUSTFS_KMS_LOCAL_MASTER_KEY='<local-kms-at-rest-master-key>'
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export RUSTFS_SSE_S3_MASTER_KEY="$(
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cargo run -q -p rustfs-kms --example local_kms_key_decrypt -- \
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/absolute/path/to/<key-id>.key
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)"
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```
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For a `plaintext-dev-only` Local KMS key file,
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`RUSTFS_KMS_LOCAL_MASTER_KEY` is not required.
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The example writes only the base64-encoded 32-byte key to stdout. Diagnostics
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go to stderr. Never paste its output into logs, shell history, issue comments,
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or committed configuration. The export path must remain read-only and must
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reuse `LocalKmsClient` decoding so current Argon2id and legacy key-file
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compatibility stay aligned with the backend.
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