chore: refactor serve command

.envrc

@@ -0,0 +1,18 @@
+# Can be debug,info,warning,error
+export LOG_LEVEL=debug
+
+# Can be net,unix
+export SERVER_MODE=net
+export SERVER_HOST="0.0.0.0"
+export SERVER_PORT="5000"
+# SERVER_SOCK_PATH = ""
+
+export STORAGE_TYPE="sqlite"
+export STORAGE_FILEPATH="./build/polyculeconnect.db"
+# STORAGE_HOST = "127.0.0.1"
+# STORAGE_PORT = "5432"
+# STORAGE_DB = "polyculeconnect"
+# STORAGE_USER = "polyculeconnect"
+# STORAGE_PASSWORD = "polyculeconnect"
+# STORAGE_SSL_MODE = "disable"
+# STORAGE_SSL_CA_FILE = ""

polyculeconnect/cmd/backend/add.go

@@ -0,0 +1,66 @@
+package cmd
+
+import (
+	"fmt"
+
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd/utils"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/services"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/services/backend"
+	"github.com/spf13/cobra"
+)
+
+var (
+	backendID     string
+	backendName   string
+	backendIssuer string
+)
+
+var backendAddCmd = &cobra.Command{
+	Use:   "add",
+	Short: "Add a new backend to the storage",
+	Long: `Add a new backend to the storage.
+
+Parameters to provide:
+- id: Unique ID to represent the backend in the storage
+- name: Human readable name to represent the backend. It will be used by
+	the user in the authentication page to select a backend during
+	authentication
+- issuer: Full hostname of the OIDC provider, e.g. 'https://github.com'`,
+	Run: func(cmd *cobra.Command, args []string) {
+		addNewBackend()
+	},
+}
+
+func addNewBackend() {
+	c := utils.InitConfig("")
+	s := utils.InitStorage(c)
+
+	clientID, clientSecret, err := services.GenerateClientIDSecret()
+	if err != nil {
+		utils.Failf("Failed to generate client id or secret: %s", err.Error())
+	}
+
+	backendConf := backend.BackendConfig{
+		Issuer:       backendIssuer,
+		ClientID:     clientID,
+		ClientSecret: clientSecret,
+		RedirectURI:  c.RedirectURI(),
+		ID:           backendID,
+		Name:         backendName,
+	}
+	if err := backend.New(s).AddBackend(backendConf); err != nil {
+		utils.Failf("Failed to add new backend to storage: %s", err.Error())
+	}
+
+	fmt.Printf("New backend %s added.\n", backendName)
+	printProperty("Client ID", clientID)
+	printProperty("Client secret", clientSecret)
+}
+
+func init() {
+	backendCmd.AddCommand(backendAddCmd)
+
+	backendAddCmd.Flags().StringVarP(&backendID, "id", "i", "", "ID to identify the backend in the storage")
+	backendAddCmd.Flags().StringVarP(&backendName, "name", "n", "", "Name to represent the backend")
+	backendAddCmd.Flags().StringVarP(&backendIssuer, "issuer", "d", "", "Full hostname of the backend")
+}

polyculeconnect/cmd/backend/backend.go

@@ -0,0 +1,30 @@
+package cmd
+
+import (
+	"fmt"
+
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd"
+	"github.com/spf13/cobra"
+)
+
+var backendCmd = &cobra.Command{
+	Use:   "backend",
+	Short: "A brief description of your command",
+	Long: `A longer description that spans multiple lines and likely contains examples
+and usage of using your command. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("backend called")
+	},
+}
+
+func printProperty(key, value string) {
+	fmt.Printf("\t- %s: %s\n", key, value)
+}
+
+func init() {
+	cmd.RootCmd.AddCommand(backendCmd)
+}

polyculeconnect/cmd/backend/remove.go

@@ -0,0 +1,38 @@
+package cmd
+
+import (
+	"errors"
+	"fmt"
+
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd/utils"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/services/backend"
+	"github.com/dexidp/dex/storage"
+	"github.com/spf13/cobra"
+)
+
+var backendRemoveCmd = &cobra.Command{
+	Use:   "remove <backend_id>",
+	Short: "Remove a backend",
+	Long: `Remove the backend with the given ID from the database.
+
+If the backend is not found in the database, no error is returned`,
+	Args: cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		removeBackend(args[0])
+	},
+}
+
+func removeBackend(backendID string) {
+	s := utils.InitStorage(utils.InitConfig(""))
+
+	if err := backend.New(s).RemoveBackend(backendID); err != nil {
+		if !errors.Is(err, storage.ErrNotFound) {
+			utils.Failf("Failed to remove backend: %s", err.Error())
+		}
+	}
+	fmt.Println("Backend deleted")
+}
+
+func init() {
+	backendCmd.AddCommand(backendRemoveCmd)
+}

polyculeconnect/cmd/backend/show.go

@@ -0,0 +1,67 @@
+package cmd
+
+import (
+	"errors"
+	"fmt"
+
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd/utils"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/services/backend"
+	"github.com/dexidp/dex/storage"
+	"github.com/spf13/cobra"
+)
+
+var backendShowCmd = &cobra.Command{
+	Use:   "show [backend_id]",
+	Short: "Display installed backends",
+	Long: `Display the configuration for the backends.
+
+Pass the commands without arguments to display the list of currently installed backends
+Pass the optional 'id' argument to display the configuration for this specific backend`,
+	Args: cobra.MaximumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		s := utils.InitStorage(utils.InitConfig(""))
+
+		if len(args) > 0 {
+			showBackend(args[0], backend.New(s))
+		} else {
+			listBackends(backend.New(s))
+		}
+	},
+}
+
+func showBackend(backendId string, backendService backend.Service) {
+	backendConfig, err := backendService.GetBackend(backendId)
+	if err != nil {
+		if errors.Is(err, storage.ErrNotFound) {
+			utils.Failf("Backend with ID %s does not exist\n", backendId)
+		}
+		utils.Failf("Failed to get config for backend %s: %q\n", backendId, err.Error())
+	}
+
+	fmt.Println("Backend config:")
+	printProperty("ID", backendConfig.ID)
+	printProperty("Name", backendConfig.Name)
+	printProperty("Issuer", backendConfig.Issuer)
+	printProperty("Client ID", backendConfig.ClientID)
+	printProperty("Client secret", backendConfig.ClientSecret)
+	printProperty("Redirect URI", backendConfig.RedirectURI)
+}
+
+func listBackends(backendService backend.Service) {
+	backends, err := backendService.ListBackends()
+	if err != nil {
+		utils.Failf("Failed to list backends: %q\n", err.Error())
+	}
+
+	if len(backends) == 0 {
+		fmt.Println("No backend configured")
+		return
+	}
+	for _, b := range backends {
+		fmt.Printf("\t - %s: (%s) - %s\n", b.ID, b.Name, b.Issuer)
+	}
+}
+
+func init() {
+	backendCmd.AddCommand(backendShowCmd)
+}

polyculeconnect/cmd/root.go

@@ -6,8 +6,8 @@ import (
 	"github.com/spf13/cobra"
 )
 
-// rootCmd represents the base command when called without any subcommands
-var rootCmd = &cobra.Command{
+// RootCmd represents the base command when called without any subcommands
+var RootCmd = &cobra.Command{
 	Use:   "polyculeconnect",
 	Short: "You're in their DM, I'm in their SSO",
 	Long: `PolyculeConnect is a SSO OpenIDConnect provider allowing multiple authentication
@@ -20,7 +20,7 @@ backends, and enabling authentication federation among several infrastructures.`
 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {
-	err := rootCmd.Execute()
+	err := RootCmd.Execute()
 	if err != nil {
 		os.Exit(1)
 	}
@@ -38,5 +38,5 @@ func init() {
 	// rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 
 	// Disable the default `completion` command to generate the autocompletion files
-	rootCmd.Root().CompletionOptions.DisableDefaultCmd = true
+	RootCmd.Root().CompletionOptions.DisableDefaultCmd = true
 }

polyculeconnect/cmd/serve/serve.go

@@ -1,4 +1,4 @@
-package cmd
+package serve
 
 import (
 	"context"
@@ -6,12 +6,12 @@ import (
 	"os/signal"
 	"time"
 
-	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/config"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd/utils"
 	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/connector"
 	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/logger"
 	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/server"
 	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/services"
-	"github.com/dexidp/dex/connector/oidc"
 	dex_server "github.com/dexidp/dex/server"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/spf13/cobra"
@@ -35,18 +35,11 @@ variables`,
 func serve() {
 	mainCtx, cancel := context.WithCancel(context.Background())
 
-	conf, err := config.New(configPath)
-	if err != nil {
-		panic(err)
-	}
-
+	conf := utils.InitConfig(configPath)
 	logger.Init(conf.LogLevel)
 	logger.L.Infof("Initialized logger with level %v", conf.LogLevel)
 
-	storageType, err := services.InitStorage(conf)
-	if err != nil {
-		logger.L.Fatalf("Failed to initialize storage backend: %s", err.Error())
-	}
+	storageType := utils.InitStorage(conf)
 	logger.L.Infof("Initialized storage backend %q", conf.StorageType)
 	dexConf := dex_server.Config{
 		Web: dex_server.WebConfig{
@@ -64,7 +57,7 @@ func serve() {
 
 	logger.L.Info("Initializing authentication backends")
 
-	dex_server.ConnectorsConfig["refuseAll"] = func() dex_server.ConnectorConfig { return new(connector.RefuseAllConfig) }
+	dex_server.ConnectorsConfig[connector.TypeRefuseAll] = func() dex_server.ConnectorConfig { return new(connector.RefuseAllConfig) }
 	connectors, err := dexConf.Storage.ListConnectors()
 	if err != nil {
 		logger.L.Fatalf("Failed to get existing connectors: %s", err.Error())
@@ -74,14 +67,7 @@ func serve() {
 		connectorIDs = append(connectorIDs, conn.ID)
 	}
 
-	backend := config.BackendConfig{
-		Config: &oidc.Config{},
-		Name:   "RefuseAll",
-		ID:     "null",
-		Type:   "refuseAll",
-	}
-
-	if err := services.CreateConnector(&backend, &dexConf, connectorIDs); err != nil {
+	if err := services.AddDefaultBackend(storageType); err != nil {
 		logger.L.Errorf("Failed to add connector for backend RefuseAll to stage: %s", err.Error())
 	}
 
@@ -140,7 +126,7 @@ func serve() {
 }
 
 func init() {
-	rootCmd.AddCommand(serveCmd)
+	cmd.RootCmd.AddCommand(serveCmd)
 
 	// Here you will define your flags and configuration settings.
 

polyculeconnect/cmd/utils/utils.go

@@ -0,0 +1,40 @@
+package utils
+
+import (
+	"fmt"
+	"os"
+
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/config"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/services"
+	"github.com/dexidp/dex/storage"
+)
+
+// Fail displays the given error to stderr and exits the program with a returncode 1
+func Fail(errMsg string) {
+	fmt.Fprintln(os.Stderr, errMsg)
+	os.Exit(1)
+}
+
+// Fail displays the given formatted error to stderr and exits the program with a returncode 1
+func Failf(msg string, args ...any) {
+	fmt.Fprintf(os.Stderr, msg+"\n", args...)
+	os.Exit(1)
+}
+
+// InitConfig inits the configuration, and fails the program if an error occurs
+func InitConfig(configPath string) *config.AppConfig {
+	conf, err := config.New(configPath)
+	if err != nil {
+		Failf("Failed to load the configuration: %s", err.Error())
+	}
+	return conf
+}
+
+// Initstorage inits the storage, and fails the program if an error occurs
+func InitStorage(config *config.AppConfig) storage.Storage {
+	s, err := services.InitStorage(config)
+	if err != nil {
+		Failf("Failed to init the storage: %s", err.Error())
+	}
+	return s
+}

polyculeconnect/config/config.go

@@ -66,6 +66,7 @@ const (
 	defaultStorageSSLCaFile = ""
 )
 
+// Deprecated: remove when we finally drop the JSON config
 type BackendConfig struct {
 	Config *oidc.Config      `json:"config"`
 	Name   string            `json:"name"`
@@ -145,6 +146,10 @@ func (ac *AppConfig) getConfFromEnv() {
 	ac.StorageConfig.Ssl.Mode = getStringFromEnv(varStorageSSLMode, defaultStorageSSLMode)
 }
 
+func (ac *AppConfig) RedirectURI() string {
+	return ac.OpenConnectConfig.Issuer + "/callback"
+}
+
 func New(filepath string) (*AppConfig, error) {
 	var conf AppConfig
 	conf.StorageConfig = &StorageConfig{}

polyculeconnect/connector/refuse_all.go

@@ -6,8 +6,18 @@ import (
 
 	"github.com/dexidp/dex/connector"
 	"github.com/dexidp/dex/pkg/log"
+	"github.com/dexidp/dex/storage"
 )
 
+const TypeRefuseAll = "refuseAll"
+
+var RefuseAllConnectorConfig storage.Connector = storage.Connector{
+	ID:     "null",
+	Name:   "RefuseAll",
+	Type:   TypeRefuseAll,
+	Config: nil,
+}
+
 type RefuseAllConfig struct{}
 
 func (c *RefuseAllConfig) Open(id string, logger log.Logger) (connector.Connector, error) {

polyculeconnect/main.go

@@ -1,6 +1,10 @@
 package main
 
-import "git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd"
+import (
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd"
+	_ "git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd/backend"
+	_ "git.faercol.me/faercol/polyculeconnect/polyculeconnect/cmd/serve"
+)
 
 func main() {
 	cmd.Execute()

polyculeconnect/services/backend/backend.go

@@ -0,0 +1,123 @@
+package backend
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/connector"
+	"github.com/dexidp/dex/connector/oidc"
+	"github.com/dexidp/dex/storage"
+)
+
+var ErrUnsupportedType = errors.New("unsupported connector type")
+
+type BackendConfig struct {
+	ID           string
+	Name         string
+	Issuer       string
+	ClientID     string
+	ClientSecret string
+	RedirectURI  string
+}
+
+func (bc *BackendConfig) OIDC() oidc.Config {
+	return oidc.Config{
+		Issuer:       bc.Issuer,
+		ClientID:     bc.ClientID,
+		ClientSecret: bc.ClientSecret,
+		RedirectURI:  bc.RedirectURI,
+	}
+}
+
+func (bc *BackendConfig) Storage() (storage.Connector, error) {
+	oidcJSON, err := json.Marshal(bc.OIDC())
+	if err != nil {
+		return storage.Connector{}, fmt.Errorf("failed to serialize oidc config: %w", err)
+	}
+
+	return storage.Connector{
+		ID:     bc.ID,
+		Type:   "oidc",
+		Name:   bc.Name,
+		Config: oidcJSON,
+	}, nil
+}
+
+func (bc *BackendConfig) FromConnector(connector storage.Connector) error {
+	var oidc oidc.Config
+	if connector.Type != "oidc" {
+		return ErrUnsupportedType
+	}
+	if err := json.Unmarshal(connector.Config, &oidc); err != nil {
+		return fmt.Errorf("invalid OIDC config: %w", err)
+	}
+	bc.ID = connector.ID
+	bc.Name = connector.Name
+	bc.ClientID = oidc.ClientID
+	bc.ClientSecret = oidc.ClientSecret
+	bc.Issuer = oidc.Issuer
+	bc.RedirectURI = oidc.RedirectURI
+	return nil
+}
+
+type Service interface {
+	ListBackends() ([]BackendConfig, error)
+	GetBackend(id string) (BackendConfig, error)
+	AddBackend(config BackendConfig) error
+	RemoveBackend(id string) error
+}
+
+type concreteBackendService struct {
+	s storage.Storage
+}
+
+func (cbs *concreteBackendService) ListBackends() ([]BackendConfig, error) {
+	connectors, err := cbs.s.ListConnectors()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get connectors from storage: %w", err)
+	}
+	var res []BackendConfig
+	for _, c := range connectors {
+
+		// We know that this type is special, we don't want to use it at all here
+		if c.Type == connector.TypeRefuseAll {
+			continue
+		}
+
+		var b BackendConfig
+		if err := b.FromConnector(c); err != nil {
+			return res, err
+		}
+		res = append(res, b)
+	}
+	return res, nil
+}
+
+func (cbs *concreteBackendService) GetBackend(connectorID string) (BackendConfig, error) {
+	c, err := cbs.s.GetConnector(connectorID)
+	if err != nil {
+		return BackendConfig{}, fmt.Errorf("failed to get connector from storage: %w", err)
+	}
+	var res BackendConfig
+	if err := res.FromConnector(c); err != nil {
+		return BackendConfig{}, err
+	}
+	return res, nil
+}
+
+func (cbs *concreteBackendService) AddBackend(config BackendConfig) error {
+	storageConf, err := config.Storage()
+	if err != nil {
+		return fmt.Errorf("failed to create storage configuration: %w", err)
+	}
+	return cbs.s.CreateConnector(storageConf)
+}
+
+func (cbs *concreteBackendService) RemoveBackend(connectorID string) error {
+	return cbs.s.DeleteConnector(connectorID)
+}
+
+func New(s storage.Storage) Service {
+	return &concreteBackendService{s}
+}

polyculeconnect/services/backend/backend_test.go

@@ -0,0 +1,215 @@
+package backend_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"testing"
+
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/connector"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/services/backend"
+	"github.com/dexidp/dex/storage"
+	"github.com/dexidp/dex/storage/memory"
+	logt "github.com/sirupsen/logrus/hooks/test"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	testDomain        string = "https://test.domain.com"
+	testClientID      string = "this_is_an_id"
+	testClientSecret  string = "this_is_a_secret"
+	testRedirectURI   string = "http://127.0.0.1:5000/callback"
+	testConnectorName string = "Test connector"
+)
+
+func generateConnector(id string) storage.Connector {
+	confJson := fmt.Sprintf(`{
+	"issuer": "%s",
+	"clientID": "%s",
+	"clientSecret": "%s",
+	"redirectURI": "%s"
+}`, testDomain, testClientID, testClientSecret, testRedirectURI)
+	storageConfig := storage.Connector{
+		ID:     id,
+		Name:   testConnectorName,
+		Type:   "oidc",
+		Config: []byte(confJson),
+	}
+	return storageConfig
+}
+
+func generateConfig(id string) backend.BackendConfig {
+	return backend.BackendConfig{
+		ID:           id,
+		Name:         testConnectorName,
+		Issuer:       testDomain,
+		ClientID:     testClientID,
+		ClientSecret: testClientSecret,
+		RedirectURI:  testRedirectURI,
+	}
+}
+
+func checkStrInMap(t *testing.T, vals map[string]interface{}, key, expected string) {
+	rawVal, ok := vals[key]
+	require.Truef(t, ok, "missing key %s", key)
+	strVal, ok := rawVal.(string)
+	require.Truef(t, ok, "invalid string format %v", rawVal)
+	assert.Equal(t, expected, strVal, "unexpected value")
+}
+
+func initStorage(t *testing.T) storage.Storage {
+	logger, _ := logt.NewNullLogger()
+	s := memory.New(logger)
+
+	require.NoError(t, s.CreateConnector(connector.RefuseAllConnectorConfig))
+	require.NoError(t, s.CreateConnector(generateConnector("test0")))
+	require.NoError(t, s.CreateConnector(generateConnector("test1")))
+
+	return s
+}
+
+func TestBackendConfigFromConnector(t *testing.T) {
+	connector := generateConnector("test")
+	var bc backend.BackendConfig
+	require.NoError(t, bc.FromConnector(connector))
+
+	assert.Equal(t, testDomain, bc.Issuer)
+	assert.Equal(t, testClientID, bc.ClientID)
+	assert.Equal(t, testClientSecret, bc.ClientSecret)
+	assert.Equal(t, testRedirectURI, bc.RedirectURI)
+	assert.Equal(t, testConnectorName, bc.Name)
+	assert.Equal(t, "test", bc.ID)
+}
+
+func TestBackendConfigInvalidType(t *testing.T) {
+	connector := generateConnector("test")
+	connector.Type = "test"
+	var bc backend.BackendConfig
+	assert.ErrorIs(t, bc.FromConnector(connector), backend.ErrUnsupportedType)
+}
+
+func TestBackendConfigInvalidOIDCConfig(t *testing.T) {
+	connector := generateConnector("test")
+	connector.Config = []byte("toto")
+	var bc backend.BackendConfig
+	assert.ErrorContains(t, bc.FromConnector(connector), "invalid OIDC config")
+}
+
+func TestOIDCConfigFromBackendConfig(t *testing.T) {
+	conf := generateConfig("test")
+	oidcConf := conf.OIDC()
+
+	assert.Equal(t, testDomain, oidcConf.Issuer)
+	assert.Equal(t, testClientID, oidcConf.ClientID)
+	assert.Equal(t, testClientSecret, oidcConf.ClientSecret)
+	assert.Equal(t, testRedirectURI, oidcConf.RedirectURI)
+}
+
+func TestConnectorConfigFromBackendConfig(t *testing.T) {
+	conf := generateConfig("test")
+	con, err := conf.Storage()
+	require.NoError(t, err)
+
+	// The OIDC config is stored as JSON data, we just want the raw keys here
+	var oidcConf map[string]interface{}
+	require.NoError(t, json.Unmarshal(con.Config, &oidcConf))
+
+	assert.Equal(t, "oidc", con.Type)
+	assert.Equal(t, "test", con.ID)
+	assert.Equal(t, testConnectorName, con.Name)
+	checkStrInMap(t, oidcConf, "issuer", testDomain)
+	checkStrInMap(t, oidcConf, "clientID", testClientID)
+	checkStrInMap(t, oidcConf, "clientSecret", testClientSecret)
+	checkStrInMap(t, oidcConf, "redirectURI", testRedirectURI)
+}
+
+func TestListBackendsEmpty(t *testing.T) {
+	logger, _ := logt.NewNullLogger()
+	s := memory.New(logger)
+
+	// add the default refuse all connector, it should not be visible in the list
+	require.NoError(t, s.CreateConnector(connector.RefuseAllConnectorConfig))
+	srv := backend.New(s)
+
+	backends, err := srv.ListBackends() // empty list, and no error
+	require.NoError(t, err)
+	require.Len(t, backends, 0)
+}
+
+func TestListBackendsNotEmpty(t *testing.T) {
+	s := initStorage(t)
+	srv := backend.New(s)
+
+	backends, err := srv.ListBackends() // empty list, and no error
+	expectedIds := []string{"test0", "test1"}
+	require.NoError(t, err)
+	assert.Len(t, backends, 2)
+	for _, c := range backends {
+		assert.Contains(t, expectedIds, c.ID)
+	}
+}
+
+func TestGetBackend(t *testing.T) {
+	s := initStorage(t)
+	srv := backend.New(s)
+
+	t.Run("OK", func(t *testing.T) {
+		conf, err := srv.GetBackend("test0")
+		require.NoError(t, err)
+		assert.Equal(t, testDomain, conf.Issuer)
+		assert.Equal(t, testClientID, conf.ClientID)
+		assert.Equal(t, testClientSecret, conf.ClientSecret)
+		assert.Equal(t, testRedirectURI, conf.RedirectURI)
+		assert.Equal(t, testConnectorName, conf.Name)
+		assert.Equal(t, "test0", conf.ID)
+	})
+
+	t.Run("Not exist", func(t *testing.T) {
+		_, err := srv.GetBackend("toto")
+		assert.ErrorIs(t, err, storage.ErrNotFound)
+	})
+
+	t.Run("Invalid type", func(t *testing.T) {
+		_, err := srv.GetBackend("null") // null has a RefuseAll type, which is unsupported here
+		assert.ErrorIs(t, err, backend.ErrUnsupportedType)
+	})
+}
+
+func TestAddBackend(t *testing.T) {
+	s := initStorage(t)
+	srv := backend.New(s)
+
+	t.Run("OK", func(t *testing.T) {
+		conf := generateConfig("test_add")
+		require.NoError(t, srv.AddBackend(conf))
+
+		var parsedConf backend.BackendConfig
+		storageConf, err := s.GetConnector("test_add")
+		require.NoError(t, err)
+		require.NoError(t, parsedConf.FromConnector(storageConf))
+		assert.Equal(t, conf, parsedConf)
+	})
+
+	t.Run("Already exists", func(t *testing.T) {
+		require.ErrorIs(t, srv.AddBackend(generateConfig("test0")), storage.ErrAlreadyExists)
+	})
+}
+
+func TestRemoveBackend(t *testing.T) {
+	s := initStorage(t)
+	srv := backend.New(s)
+
+	t.Run("OK", func(t *testing.T) {
+		require.NoError(t, srv.AddBackend(generateConfig("to_remove")))
+		_, err := s.GetConnector("to_remove")
+		require.NoError(t, err) // no error means it's present
+
+		require.NoError(t, srv.RemoveBackend("to_remove"))
+		_, err = s.GetConnector("to_remove")
+		assert.ErrorIs(t, err, storage.ErrNotFound) // means it's been deleted
+	})
+
+	t.Run("No present", func(t *testing.T) {
+		require.ErrorIs(t, srv.RemoveBackend("toto"), storage.ErrNotFound)
+	})
+}

polyculeconnect/services/idsecret.go

@@ -0,0 +1,34 @@
+package services
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+)
+
+// size in bytes of the client ids and secrets
+const idSecretSize = 32
+
+func generateRandomHex(size int) (string, error) {
+	raw := make([]byte, size)
+	n, err := rand.Read(raw)
+	if err != nil {
+		return "", fmt.Errorf("failed to read from random generator: %w", err)
+	}
+	if n != size {
+		return "", fmt.Errorf("failed to read from random generator (%d/%d)", n, size)
+	}
+	return hex.EncodeToString(raw), nil
+}
+
+func GenerateClientIDSecret() (string, string, error) {
+	clientID, err := generateRandomHex(idSecretSize)
+	if err != nil {
+		return "", "", fmt.Errorf("failed to generate client id: %w", err)
+	}
+	clientSecret, err := generateRandomHex(idSecretSize)
+	if err != nil {
+		return "", "", fmt.Errorf("failed to generate client secret: %w", err)
+	}
+	return clientID, clientSecret, nil
+}

polyculeconnect/services/storage.go

@@ -1,9 +1,11 @@
 package services
 
 import (
+	"errors"
 	"fmt"
 
 	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/config"
+	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/connector"
 	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/logger"
 	"github.com/dexidp/dex/storage"
 	"github.com/dexidp/dex/storage/memory"
@@ -29,3 +31,10 @@ func InitStorage(conf *config.AppConfig) (storage.Storage, error) {
 	}
 	return storageType, nil
 }
+
+func AddDefaultBackend(s storage.Storage) error {
+	if err := s.CreateConnector(connector.RefuseAllConnectorConfig); err != nil && !errors.Is(err, storage.ErrAlreadyExists) {
+		return fmt.Errorf("failed to add default backend: %w", err)
+	}
+	return nil
+}