Initial scaffold: certificate control plane v0.1.0

2026-06-14 21:38:51 +00:00 · 2026-03-14 08:22:17 -04:00
commit d395776a95
57 changed files with 9548 additions and 0 deletions
@@ -0,0 +1,186 @@
+package acme
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"time"
+
+	"github.com/shankar0123/certctl/internal/connector/issuer"
+)
+
+// Config represents the ACME issuer connector configuration.
+type Config struct {
+	DirectoryURL string `json:"directory_url"`
+	Email        string `json:"email"`
+	EABKid       string `json:"eab_kid,omitempty"`
+	EABHmac      string `json:"eab_hmac,omitempty"`
+}
+
+// Connector implements the issuer.Connector interface for ACME-compatible CAs.
+// This is a stub implementation that demonstrates the structure; actual ACME protocol
+// implementation will use a proper ACME library (e.g., golang.org/x/crypto/acme).
+type Connector struct {
+	config *Config
+	logger *slog.Logger
+	client *http.Client
+}
+
+// New creates a new ACME connector with the given configuration and logger.
+func New(config *Config, logger *slog.Logger) *Connector {
+	return &Connector{
+		config: config,
+		logger: logger,
+		client: &http.Client{Timeout: 30 * time.Second},
+	}
+}
+
+// ValidateConfig checks that the ACME directory URL is reachable and valid.
+// It performs a HEAD request to the directory URL to verify connectivity.
+func (c *Connector) ValidateConfig(ctx context.Context, rawConfig json.RawMessage) error {
+	var cfg Config
+	if err := json.Unmarshal(rawConfig, &cfg); err != nil {
+		return fmt.Errorf("invalid ACME config: %w", err)
+	}
+
+	if cfg.DirectoryURL == "" {
+		return fmt.Errorf("ACME directory_url is required")
+	}
+
+	if cfg.Email == "" {
+		return fmt.Errorf("ACME email is required")
+	}
+
+	c.logger.Info("validating ACME configuration", "directory_url", cfg.DirectoryURL)
+
+	// Verify that the directory URL is reachable
+	req, err := http.NewRequestWithContext(ctx, http.MethodHead, cfg.DirectoryURL, nil)
+	if err != nil {
+		return fmt.Errorf("failed to create request: %w", err)
+	}
+
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to reach ACME directory: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("ACME directory returned status %d", resp.StatusCode)
+	}
+
+	c.config = &cfg
+	c.logger.Info("ACME configuration validated")
+	return nil
+}
+
+// IssueCertificate submits a certificate issuance request to the ACME CA.
+//
+// The flow for ACME is:
+// 1. Create a new order with the CA, specifying the identifiers (SANs + CN)
+// 2. The CA returns authorization challenges (DNS, HTTP, etc.)
+// 3. Solve the challenges (stub: in production, the agent or external solver handles this)
+// 4. Finalize the order by submitting the CSR
+// 5. Download the issued certificate and chain
+//
+// TODO: Implement actual ACME protocol using golang.org/x/crypto/acme.
+// This stub documents the expected flow but doesn't execute it.
+func (c *Connector) IssueCertificate(ctx context.Context, request issuer.IssuanceRequest) (*issuer.IssuanceResult, error) {
+	c.logger.Info("processing ACME issuance request",
+		"common_name", request.CommonName,
+		"san_count", len(request.SANs))
+
+	// TODO: Implement ACME order creation.
+	// For now, return a stub response to demonstrate the interface.
+	// In production:
+	//   1. Connect to the ACME directory
+	//   2. Create a new order with identifiers from CommonName and SANs
+	//   3. Get authorization challenges
+	//   4. Wait for challenge completion (agent/solver will handle)
+	//   5. Submit CSR to finalize order
+	//   6. Retrieve issued certificate and chain
+
+	c.logger.Warn("ACME issuance not yet implemented", "common_name", request.CommonName)
+
+	// Stub: Return a placeholder result
+	return &issuer.IssuanceResult{
+		CertPEM:   "-----BEGIN CERTIFICATE-----\n(stub)\n-----END CERTIFICATE-----\n",
+		ChainPEM:  "-----BEGIN CERTIFICATE-----\n(stub chain)\n-----END CERTIFICATE-----\n",
+		Serial:    "stub-serial-123456",
+		NotBefore: time.Now(),
+		NotAfter:  time.Now().AddDate(0, 0, 90),
+		OrderID:   "stub-order-id",
+	}, nil
+}
+
+// RenewCertificate renews an existing certificate by submitting a new ACME order.
+// The process is identical to IssueCertificate but uses the existing CSR from the previous certificate.
+//
+// TODO: Implement actual ACME protocol using golang.org/x/crypto/acme.
+func (c *Connector) RenewCertificate(ctx context.Context, request issuer.RenewalRequest) (*issuer.IssuanceResult, error) {
+	c.logger.Info("processing ACME renewal request",
+		"common_name", request.CommonName,
+		"san_count", len(request.SANs))
+
+	// TODO: Implement ACME renewal.
+	// In production:
+	//   1. Create a new order with the same identifiers
+	//   2. Obtain and solve authorization challenges
+	//   3. Submit the CSR (from request.CSRPEM)
+	//   4. Retrieve the issued certificate and chain
+
+	c.logger.Warn("ACME renewal not yet implemented", "common_name", request.CommonName)
+
+	// Stub: Return a placeholder result
+	return &issuer.IssuanceResult{
+		CertPEM:   "-----BEGIN CERTIFICATE-----\n(stub renewed)\n-----END CERTIFICATE-----\n",
+		ChainPEM:  "-----BEGIN CERTIFICATE-----\n(stub chain)\n-----END CERTIFICATE-----\n",
+		Serial:    "stub-serial-renewal-123456",
+		NotBefore: time.Now(),
+		NotAfter:  time.Now().AddDate(0, 0, 90),
+		OrderID:   "stub-order-renewal-id",
+	}, nil
+}
+
+// RevokeCertificate revokes a certificate at the ACME CA.
+// The CA will no longer consider the certificate valid.
+//
+// TODO: Implement revocation via ACME protocol.
+func (c *Connector) RevokeCertificate(ctx context.Context, request issuer.RevocationRequest) error {
+	c.logger.Info("processing ACME revocation request", "serial", request.Serial)
+
+	// TODO: Implement ACME revocation.
+	// In production:
+	//   1. Retrieve the certificate PEM
+	//   2. Post revocation request to CA's revocation endpoint
+	//   3. Provide reason if given
+
+	c.logger.Warn("ACME revocation not yet implemented", "serial", request.Serial)
+	return nil
+}
+
+// GetOrderStatus retrieves the current status of an ACME order.
+// This is useful for polling the status of pending issuance or renewal orders.
+//
+// TODO: Implement order status polling.
+func (c *Connector) GetOrderStatus(ctx context.Context, orderID string) (*issuer.OrderStatus, error) {
+	c.logger.Info("fetching ACME order status", "order_id", orderID)
+
+	// TODO: Implement ACME order status polling.
+	// In production:
+	//   1. Connect to the ACME directory
+	//   2. Fetch order status by orderID
+	//   3. Return current status, message, and any issued certificate material
+
+	c.logger.Warn("ACME order status polling not yet implemented", "order_id", orderID)
+
+	// Stub: Return a placeholder status
+	return &issuer.OrderStatus{
+		OrderID:   orderID,
+		Status:    "processing",
+		Message:   nil,
+		UpdatedAt: time.Now(),
+	}, nil
+}
@@ -0,0 +1,69 @@
+package issuer
+
+import (
+	"context"
+	"encoding/json"
+	"time"
+)
+
+// Connector defines the interface for certificate issuance operations.
+type Connector interface {
+	// ValidateConfig validates the issuer configuration.
+	ValidateConfig(ctx context.Context, config json.RawMessage) error
+
+	// IssueCertificate issues a new certificate.
+	IssueCertificate(ctx context.Context, request IssuanceRequest) (*IssuanceResult, error)
+
+	// RenewCertificate renews an existing certificate.
+	RenewCertificate(ctx context.Context, request RenewalRequest) (*IssuanceResult, error)
+
+	// RevokeCertificate revokes a certificate.
+	RevokeCertificate(ctx context.Context, request RevocationRequest) error
+
+	// GetOrderStatus retrieves the status of an issuance or renewal order.
+	GetOrderStatus(ctx context.Context, orderID string) (*OrderStatus, error)
+}
+
+// IssuanceRequest contains the parameters for issuing a new certificate.
+type IssuanceRequest struct {
+	CommonName string   `json:"common_name"`
+	SANs       []string `json:"sans"`
+	CSRPEM     string   `json:"csr_pem"`
+}
+
+// IssuanceResult contains the result of a successful certificate issuance.
+type IssuanceResult struct {
+	CertPEM    string    `json:"cert_pem"`
+	ChainPEM   string    `json:"chain_pem"`
+	Serial     string    `json:"serial"`
+	NotBefore  time.Time `json:"not_before"`
+	NotAfter   time.Time `json:"not_after"`
+	OrderID    string    `json:"order_id"`
+}
+
+// RenewalRequest contains the parameters for renewing a certificate.
+type RenewalRequest struct {
+	CommonName string   `json:"common_name"`
+	SANs       []string `json:"sans"`
+	CSRPEM     string   `json:"csr_pem"`
+	OrderID    *string  `json:"order_id,omitempty"`
+}
+
+// RevocationRequest contains the parameters for revoking a certificate.
+type RevocationRequest struct {
+	Serial string  `json:"serial"`
+	Reason *string `json:"reason,omitempty"`
+}
+
+// OrderStatus contains the status of a pending issuance or renewal order.
+type OrderStatus struct {
+	OrderID    string    `json:"order_id"`
+	Status     string    `json:"status"`
+	Message    *string   `json:"message,omitempty"`
+	CertPEM    *string   `json:"cert_pem,omitempty"`
+	ChainPEM   *string   `json:"chain_pem,omitempty"`
+	Serial     *string   `json:"serial,omitempty"`
+	NotBefore  *time.Time `json:"not_before,omitempty"`
+	NotAfter   *time.Time `json:"not_after,omitempty"`
+	UpdatedAt  time.Time  `json:"updated_at"`
+}