317 lines
10 KiB
Go
317 lines
10 KiB
Go
package main
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import (
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"encoding/base64"
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"encoding/json"
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"fmt"
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"os"
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"strconv"
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"strings"
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"golang.org/x/crypto/bcrypt"
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"github.com/dexidp/dex/pkg/log"
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"github.com/dexidp/dex/server"
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"github.com/dexidp/dex/storage"
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"github.com/dexidp/dex/storage/etcd"
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"github.com/dexidp/dex/storage/kubernetes"
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"github.com/dexidp/dex/storage/memory"
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"github.com/dexidp/dex/storage/sql"
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)
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// Config is the config format for the main application.
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type Config struct {
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Issuer string `json:"issuer"`
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Storage Storage `json:"storage"`
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Web Web `json:"web"`
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Telemetry Telemetry `json:"telemetry"`
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OAuth2 OAuth2 `json:"oauth2"`
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GRPC GRPC `json:"grpc"`
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Expiry Expiry `json:"expiry"`
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Logger Logger `json:"logger"`
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Frontend server.WebConfig `json:"frontend"`
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// StaticConnectors are user defined connectors specified in the ConfigMap
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// Write operations, like updating a connector, will fail.
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StaticConnectors []Connector `json:"connectors"`
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// StaticClients cause the server to use this list of clients rather than
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// querying the storage. Write operations, like creating a client, will fail.
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StaticClients []storage.Client `json:"staticClients"`
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// If enabled, the server will maintain a list of passwords which can be used
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// to identify a user.
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EnablePasswordDB bool `json:"enablePasswordDB"`
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// StaticPasswords cause the server use this list of passwords rather than
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// querying the storage. Cannot be specified without enabling a passwords
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// database.
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StaticPasswords []password `json:"staticPasswords"`
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}
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// Validate the configuration
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func (c Config) Validate() error {
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// Fast checks. Perform these first for a more responsive CLI.
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checks := []struct {
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bad bool
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errMsg string
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}{
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{c.Issuer == "", "no issuer specified in config file"},
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{!c.EnablePasswordDB && len(c.StaticPasswords) != 0, "cannot specify static passwords without enabling password db"},
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{c.Storage.Config == nil, "no storage supplied in config file"},
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{c.Web.HTTP == "" && c.Web.HTTPS == "", "must supply a HTTP/HTTPS address to listen on"},
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{c.Web.HTTPS != "" && c.Web.TLSCert == "", "no cert specified for HTTPS"},
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{c.Web.HTTPS != "" && c.Web.TLSKey == "", "no private key specified for HTTPS"},
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{c.GRPC.TLSCert != "" && c.GRPC.Addr == "", "no address specified for gRPC"},
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{c.GRPC.TLSKey != "" && c.GRPC.Addr == "", "no address specified for gRPC"},
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{(c.GRPC.TLSCert == "") != (c.GRPC.TLSKey == ""), "must specific both a gRPC TLS cert and key"},
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{c.GRPC.TLSCert == "" && c.GRPC.TLSClientCA != "", "cannot specify gRPC TLS client CA without a gRPC TLS cert"},
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}
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var checkErrors []string
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for _, check := range checks {
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if check.bad {
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checkErrors = append(checkErrors, check.errMsg)
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}
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}
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if len(checkErrors) != 0 {
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return fmt.Errorf("invalid Config:\n\t-\t%s", strings.Join(checkErrors, "\n\t-\t"))
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}
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return nil
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}
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type password storage.Password
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func (p *password) UnmarshalJSON(b []byte) error {
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var data struct {
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Email string `json:"email"`
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Username string `json:"username"`
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UserID string `json:"userID"`
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Hash string `json:"hash"`
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HashFromEnv string `json:"hashFromEnv"`
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}
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if err := json.Unmarshal(b, &data); err != nil {
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return err
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}
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*p = password(storage.Password{
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Email: data.Email,
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Username: data.Username,
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UserID: data.UserID,
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})
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if len(data.Hash) == 0 && len(data.HashFromEnv) > 0 {
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data.Hash = os.Getenv(data.HashFromEnv)
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}
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if len(data.Hash) == 0 {
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return fmt.Errorf("no password hash provided")
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}
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// If this value is a valid bcrypt, use it.
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_, bcryptErr := bcrypt.Cost([]byte(data.Hash))
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if bcryptErr == nil {
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p.Hash = []byte(data.Hash)
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return nil
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}
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// For backwards compatibility try to base64 decode this value.
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hashBytes, err := base64.StdEncoding.DecodeString(data.Hash)
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if err != nil {
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return fmt.Errorf("malformed bcrypt hash: %v", bcryptErr)
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}
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if _, err := bcrypt.Cost(hashBytes); err != nil {
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return fmt.Errorf("malformed bcrypt hash: %v", err)
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}
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p.Hash = hashBytes
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return nil
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}
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// OAuth2 describes enabled OAuth2 extensions.
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type OAuth2 struct {
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ResponseTypes []string `json:"responseTypes"`
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// If specified, do not prompt the user to approve client authorization. The
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// act of logging in implies authorization.
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SkipApprovalScreen bool `json:"skipApprovalScreen"`
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// If specified, show the connector selection screen even if there's only one
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AlwaysShowLoginScreen bool `json:"alwaysShowLoginScreen"`
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// This is the connector that can be used for password grant
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PasswordConnector string `json:"passwordConnector"`
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}
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// Web is the config format for the HTTP server.
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type Web struct {
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HTTP string `json:"http"`
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HTTPS string `json:"https"`
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TLSCert string `json:"tlsCert"`
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TLSKey string `json:"tlsKey"`
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AllowedOrigins []string `json:"allowedOrigins"`
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}
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// Telemetry is the config format for telemetry including the HTTP server config.
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type Telemetry struct {
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HTTP string `json:"http"`
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}
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// GRPC is the config for the gRPC API.
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type GRPC struct {
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// The port to listen on.
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Addr string `json:"addr"`
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TLSCert string `json:"tlsCert"`
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TLSKey string `json:"tlsKey"`
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TLSClientCA string `json:"tlsClientCA"`
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Reflection bool `json:"reflection"`
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}
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// Storage holds app's storage configuration.
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type Storage struct {
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Type string `json:"type"`
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Config StorageConfig `json:"config"`
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}
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// StorageConfig is a configuration that can create a storage.
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type StorageConfig interface {
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Open(logger log.Logger) (storage.Storage, error)
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}
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var storages = map[string]func() StorageConfig{
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"etcd": func() StorageConfig { return new(etcd.Etcd) },
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"kubernetes": func() StorageConfig { return new(kubernetes.Config) },
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"memory": func() StorageConfig { return new(memory.Config) },
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"sqlite3": func() StorageConfig { return new(sql.SQLite3) },
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"postgres": func() StorageConfig { return new(sql.Postgres) },
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"mysql": func() StorageConfig { return new(sql.MySQL) },
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}
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// isExpandEnvEnabled returns if os.ExpandEnv should be used for each storage and connector config.
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// Disabling this feature avoids surprises e.g. if the LDAP bind password contains a dollar character.
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// Returns false if the env variable "DEX_EXPAND_ENV" is a falsy string, e.g. "false".
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// Returns true if the env variable is unset or a truthy string, e.g. "true", or can't be parsed as bool.
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func isExpandEnvEnabled() bool {
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enabled, err := strconv.ParseBool(os.Getenv("DEX_EXPAND_ENV"))
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if err != nil {
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// Unset, empty string or can't be parsed as bool: Default = true.
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return true
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}
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return enabled
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}
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// UnmarshalJSON allows Storage to implement the unmarshaler interface to
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// dynamically determine the type of the storage config.
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func (s *Storage) UnmarshalJSON(b []byte) error {
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var store struct {
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Type string `json:"type"`
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Config json.RawMessage `json:"config"`
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}
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if err := json.Unmarshal(b, &store); err != nil {
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return fmt.Errorf("parse storage: %v", err)
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}
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f, ok := storages[store.Type]
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if !ok {
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return fmt.Errorf("unknown storage type %q", store.Type)
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}
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storageConfig := f()
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if len(store.Config) != 0 {
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data := []byte(store.Config)
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if isExpandEnvEnabled() {
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// Caution, we're expanding in the raw JSON/YAML source. This may not be what the admin expects.
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data = []byte(os.ExpandEnv(string(store.Config)))
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}
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if err := json.Unmarshal(data, storageConfig); err != nil {
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return fmt.Errorf("parse storage config: %v", err)
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}
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}
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*s = Storage{
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Type: store.Type,
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Config: storageConfig,
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}
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return nil
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}
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// Connector is a magical type that can unmarshal YAML dynamically. The
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// Type field determines the connector type, which is then customized for Config.
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type Connector struct {
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Type string `json:"type"`
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Name string `json:"name"`
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ID string `json:"id"`
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Config server.ConnectorConfig `json:"config"`
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}
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// UnmarshalJSON allows Connector to implement the unmarshaler interface to
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// dynamically determine the type of the connector config.
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func (c *Connector) UnmarshalJSON(b []byte) error {
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var conn struct {
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Type string `json:"type"`
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Name string `json:"name"`
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ID string `json:"id"`
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Config json.RawMessage `json:"config"`
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}
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if err := json.Unmarshal(b, &conn); err != nil {
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return fmt.Errorf("parse connector: %v", err)
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}
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f, ok := server.ConnectorsConfig[conn.Type]
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if !ok {
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return fmt.Errorf("unknown connector type %q", conn.Type)
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}
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connConfig := f()
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if len(conn.Config) != 0 {
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data := []byte(conn.Config)
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if isExpandEnvEnabled() {
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// Caution, we're expanding in the raw JSON/YAML source. This may not be what the admin expects.
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data = []byte(os.ExpandEnv(string(conn.Config)))
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}
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if err := json.Unmarshal(data, connConfig); err != nil {
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return fmt.Errorf("parse connector config: %v", err)
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}
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}
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*c = Connector{
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Type: conn.Type,
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Name: conn.Name,
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ID: conn.ID,
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Config: connConfig,
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}
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return nil
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}
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// ToStorageConnector converts an object to storage connector type.
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func ToStorageConnector(c Connector) (storage.Connector, error) {
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data, err := json.Marshal(c.Config)
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if err != nil {
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return storage.Connector{}, fmt.Errorf("failed to marshal connector config: %v", err)
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}
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return storage.Connector{
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ID: c.ID,
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Type: c.Type,
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Name: c.Name,
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Config: data,
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}, nil
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}
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// Expiry holds configuration for the validity period of components.
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type Expiry struct {
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// SigningKeys defines the duration of time after which the SigningKeys will be rotated.
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SigningKeys string `json:"signingKeys"`
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// IdTokens defines the duration of time for which the IdTokens will be valid.
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IDTokens string `json:"idTokens"`
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// AuthRequests defines the duration of time for which the AuthRequests will be valid.
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AuthRequests string `json:"authRequests"`
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// DeviceRequests defines the duration of time for which the DeviceRequests will be valid.
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DeviceRequests string `json:"deviceRequests"`
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}
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// Logger holds configuration required to customize logging for dex.
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type Logger struct {
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// Level sets logging level severity.
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Level string `json:"level"`
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// Format specifies the format to be used for logging.
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Format string `json:"format"`
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}
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