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https://github.com/DeBrosOfficial/orama.git
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34f9da6f8d
- Add `ntfyFanoutResolver` to distribute push notifications across all active cluster nodes, ensuring delivery when nodes lack shared state. - Refactor secrets encryption key derivation to use cluster-wide secrets via HKDF, replacing ephemeral per-node keys to fix cross-node decryption issues. - Add unit tests for fan-out resolution logic and caching behavior.
50 lines
2.3 KiB
Go
50 lines
2.3 KiB
Go
package gateway
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import (
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"encoding/hex"
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"strings"
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"github.com/DeBrosOfficial/network/pkg/secrets"
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)
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// secretsEncryptionDerivePurpose is the HKDF info label used to derive the
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// function-secrets AES-256 key from the cluster secret. Deriving it (instead of
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// generating a per-node crypto/rand key file) guarantees every gateway in the
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// cluster computes the IDENTICAL key, so a secret written on one node decrypts
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// on every other node and survives rolling upgrades — eliminating the
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// key-divergence / convergence-window class that kept get_secret broken for
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// days (bugboard #837). Same pattern as the cluster-wide JWT signing key
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// (jwtEdDSADerivePurpose) and the TURN encryption key ("turn-encryption").
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//
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// Bumping the version label (e.g. "...-v2") is a DELIBERATE rotation that
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// invalidates every stored function secret (they must be re-`set`). It must
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// never be changed casually.
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const secretsEncryptionDerivePurpose = "orama-secrets-encryption-v1"
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// resolveSecretsEncryptionKeyHex returns the hex-encoded AES-256 key the
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// serverless secrets manager should use to encrypt/decrypt function secrets.
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//
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// Primary: derive deterministically from the cluster secret via HKDF, so the
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// key is identical on every gateway in the cluster and stable across restarts
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// and rolling upgrades. The cluster secret is TrimSpace'd first so a stray
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// trailing newline on one node's secret file can't silently diverge its derived
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// key from the rest of the cluster (the host gateway reads the file untrimmed
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// while the namespace gateway trims it — without this they could derive
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// different keys and reintroduce #837).
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//
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// Fallback: when no cluster secret is available (single-node test rigs / legacy
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// deployments without a shared secret), fall back to an explicitly-configured
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// key file. An empty result then makes the production secrets manager fail loud
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// (NewDBSecretsManager with allowEphemeral=false), rather than silently using a
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// per-process ephemeral key.
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func resolveSecretsEncryptionKeyHex(clusterSecret, fileKeyHex string) (string, error) {
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if cs := strings.TrimSpace(clusterSecret); cs != "" {
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key, err := secrets.DeriveKey(cs, secretsEncryptionDerivePurpose)
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if err != nil {
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return "", err
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}
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return hex.EncodeToString(key), nil
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}
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return strings.TrimSpace(fileKeyHex), nil
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}
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