Vault Plugin New |work| -

Ensure your plugin handles token renewal and revocation correctly, as failing to do so can lead to orphaned credentials.

plugin.Serve(&plugin.ServeOpts BackendFactoryFunc: Factory, Logger: logger, )

Once registered in the catalog, mount the custom secrets engine to a dedicated API route endpoint:

}

Running arbitrary binaries alongside your central infrastructure secrets store presents an obvious attack vector. To mitigate this risk, Vault enforces strict security boundaries and operational controls around the execution of external plugins. Mutual TLS (mTLS) Enforcement

package main import ( "context" "crypto/rand" "encoding/hex" "fmt" "time" "://github.com" "://github.com" ) func pathToken(b *CustomBackend) *framework.Path return &framework.Path Pattern: "token", Operations: map[logical.Operation]framework.OperationHandler logical.ReadOperation: &framework.PathOperationCallback: b.pathTokenGenerate, , func (b *CustomBackend) pathTokenGenerate(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { // Read our local saved configuration to simulate processing entry, err := req.Storage.Get(ctx, "config") if err != nil || entry == nil return nil, fmt.Errorf("backend misconfigured or unreadable: %v", err) // Generate a secure mock random pseudo-token bytes := make([]byte, 16) if _, err := rand.Read(bytes); err != nil return nil, err generatedToken := hex.EncodeToString(bytes) // Build a lease-bound response resp := &logical.Response{ Data: map[string]interface{} "token": fmt.Sprintf("custom-svc-%s", generatedToken), "issued_at": time.Now().UTC().Format(time.RFC3339), "permission": "read-only", , } // Attach lease definitions for token lifespan controls resp.Secret = &logical.Secret LeaseOptions: logical.LeaseOptions TTL: time.Hour * 1, Renewable: true, , return resp, nil } Use code with caution. 5. Compilation, Registration, and Deployment

func pathCredsRead(ctx context.Context, req *logical.Request, d *framework.FieldData) (*logical.Response, error) { // Retrieve config entry, err := req.Storage.Get(ctx, "config") if err != nil || entry == nil return logical.ErrorResponse("plugin not configured"), nil vault plugin new

The main.go file executes the plugin framework's serving loop. This connects your custom backend to Vault's gRPC server factory.

A functional C compiler (if using CGO, though pure Go is preferred) Core Dependencies

This compiles phish into ./bin/phish (or phish.exe on Windows, though not recommended). Ensure your plugin handles token renewal and revocation

(Save this output string; you will need it to register the plugin with Vault). 5. Registering and Enabling the New Plugin

While Vault supports mainstream databases, "new" plugins allow integration with proprietary in-house databases or niche SaaS products that lack official support.