Add oper classes, for more finely-grained control

CHANGELOG.md

@@ -10,8 +10,10 @@ New release of Oragono!
 ### Security
 
 ### Added
+* Operator classes, allowing for more finely-grained permissions for operators.
 
 ### Changed
+* In the config file, "operator" changed to "opers", and new oper class is required.
 
 ### Removed
 

irc/client.go

@@ -37,6 +37,7 @@ type Client struct {
 	capVersion         CapVersion
 	certfp             string
 	channels           ChannelSet
+	class              *OperClass
 	ctime              time.Time
 	flags              map[UserMode]bool
 	isDestroyed        bool
@@ -50,6 +51,7 @@ type Client struct {
 	nickCasefolded     string
 	nickMaskString     string // cache for nickmask string since it's used with lots of replies
 	nickMaskCasefolded string
+	operName           string
 	quitTimer          *time.Timer
 	realname           string
 	registered         bool
@@ -347,6 +349,12 @@ func (client *Client) destroy() {
 	friends := client.Friends()
 	friends.Remove(client)
 
+	// remove from opers list
+	_, exists := client.server.currentOpers[client]
+	if exists {
+		delete(client.server.currentOpers, client)
+	}
+
 	// alert monitors
 	for _, mClient := range client.server.monitoring[client.nickCasefolded] {
 		mClient.Send(nil, client.server.name, RPL_MONOFFLINE, mClient.nick, client.nick)

irc/config.go

@@ -8,6 +8,7 @@ package irc
 import (
 	"crypto/tls"
 	"errors"
+	"fmt"
 	"io/ioutil"
 	"log"
 
@@ -65,6 +66,26 @@ type AccountRegistrationConfig struct {
 	}
 }
 
+type OperClassConfig struct {
+	Title        string
+	Extends      string
+	Capabilities []string
+}
+
+type OperConfig struct {
+	Class    string
+	Vhost    string
+	Password string
+}
+
+func (conf *OperConfig) PasswordBytes() []byte {
+	bytes, err := DecodePasswordHash(conf.Password)
+	if err != nil {
+		log.Fatal("decode password error: ", err)
+	}
+	return bytes
+}
+
 type Config struct {
 	Network struct {
 		Name string
@@ -92,7 +113,9 @@ type Config struct {
 		Accounts AccountRegistrationConfig
 	}
 
-	Operator map[string]*PassConfig
+	OperClasses map[string]*OperClassConfig `yaml:"oper-classes"`
+
+	Opers map[string]*OperConfig
 
 	Limits struct {
 		NickLen        uint `yaml:"nicklen"`
@@ -105,17 +128,97 @@ type Config struct {
 	}
 }
 
-func (conf *Config) Operators() map[string][]byte {
-	operators := make(map[string][]byte)
-	for name, opConf := range conf.Operator {
+type OperClass struct {
+	Title        string
+	Capabilities map[string]bool // map to make lookups much easier
+}
+
+func (conf *Config) OperatorClasses() (*map[string]OperClass, error) {
+	ocs := make(map[string]OperClass)
+
+	// loop from no extends to most extended, breaking if we can't add any more
+	lenOfLastOcs := -1
+	for {
+		if lenOfLastOcs == len(ocs) {
+			return nil, errors.New("OperClasses contains a looping dependency, or a class extends from a class that doesn't exist")
+		}
+		lenOfLastOcs = len(ocs)
+
+		var anyMissing bool
+		for name, info := range conf.OperClasses {
+			_, exists := ocs[name]
+			_, extendsExists := ocs[info.Extends]
+			if exists {
+				// class already exists
+				continue
+			} else if len(info.Extends) > 0 && !extendsExists {
+				// class we extend on doesn't exist
+				_, exists := conf.OperClasses[info.Extends]
+				if !exists {
+					return nil, fmt.Errorf("Operclass [%s] extends [%s], which doesn't exist", name, info.Extends)
+				}
+				anyMissing = true
+				continue
+			}
+
+			// create new operclass
+			var oc OperClass
+			oc.Capabilities = make(map[string]bool)
+
+			// get inhereted info from other operclasses
+			if len(info.Extends) > 0 {
+				einfo, _ := ocs[info.Extends]
+
+				for capab := range einfo.Capabilities {
+					oc.Capabilities[capab] = true
+				}
+			}
+
+			// add our own info
+			oc.Title = info.Title
+			for _, capab := range info.Capabilities {
+				oc.Capabilities[capab] = true
+			}
+
+			ocs[name] = oc
+		}
+
+		if !anyMissing {
+			// we've got every operclass!
+			break
+		}
+	}
+
+	return &ocs, nil
+}
+
+type Oper struct {
+	Class *OperClass
+	Pass  []byte
+}
+
+func (conf *Config) Operators(oc *map[string]OperClass) (map[string]Oper, error) {
+	operators := make(map[string]Oper)
+	for name, opConf := range conf.Opers {
+		var oper Oper
+
+		// oper name
 		name, err := CasefoldName(name)
-		if err == nil {
-			operators[name] = opConf.PasswordBytes()
-		} else {
-			log.Println("Could not casefold oper name:", err.Error())
+		if err != nil {
+			return nil, fmt.Errorf("Could not casefold oper name: %s", err.Error())
 		}
+
+		oper.Pass = opConf.PasswordBytes()
+		class, exists := (*oc)[opConf.Class]
+		if !exists {
+			return nil, fmt.Errorf("Could not load operator [%s] - they use operclass [%s] which does not exist", name, opConf.Class)
 		}
-	return operators
+		oper.Class = &class
+
+		// successful, attach to list of opers
+		operators[name] = oper
+	}
+	return operators, nil
 }
 
 func (conf *Config) TLSListeners() map[string]*tls.Config {
@@ -169,5 +272,6 @@ func LoadConfig(filename string) (config *Config, err error) {
 	if config.Limits.NickLen < 1 || config.Limits.ChannelLen < 2 || config.Limits.AwayLen < 1 || config.Limits.KickLen < 1 || config.Limits.TopicLen < 1 {
 		return nil, errors.New("Limits aren't setup properly, check them and make them sane")
 	}
+
 	return config, nil
 }

irc/server.go

@@ -66,6 +66,7 @@ type Server struct {
 	commands              chan Command
 	configFilename        string
 	ctime                 time.Time
+	currentOpers          map[*Client]bool
 	store                 buntdb.DB
 	idle                  chan *Client
 	limits                Limits
@@ -78,7 +79,8 @@ type Server struct {
 	nameCasefolded        string
 	networkName           string
 	newConns              chan clientConn
-	operators             map[string][]byte
+	operators             map[string]Oper
+	operclasses           map[string]OperClass
 	password              []byte
 	passwords             *PasswordManager
 	rehashMutex           sync.Mutex
@@ -115,6 +117,15 @@ func NewServer(configFilename string, config *Config) *Server {
 		SupportedCapabilities[SASL] = true
 	}
 
+	operClasses, err := config.OperatorClasses()
+	if err != nil {
+		log.Fatal("Error loading oper classes:", err.Error())
+	}
+	opers, err := config.Operators(operClasses)
+	if err != nil {
+		log.Fatal("Error loading operators:", err.Error())
+	}
+
 	server := &Server{
 		accounts:              make(map[string]*ClientAccount),
 		authenticationEnabled: config.AuthenticationEnabled,
@@ -123,6 +134,7 @@ func NewServer(configFilename string, config *Config) *Server {
 		commands:              make(chan Command),
 		configFilename:        configFilename,
 		ctime:                 time.Now(),
+		currentOpers:          make(map[*Client]bool),
 		idle:                  make(chan *Client),
 		limits: Limits{
 			AwayLen:        int(config.Limits.AwayLen),
@@ -138,7 +150,8 @@ func NewServer(configFilename string, config *Config) *Server {
 		nameCasefolded: casefoldedName,
 		networkName:    config.Network.Name,
 		newConns:       make(chan clientConn),
-		operators:      config.Operators(),
+		operclasses:    *operClasses,
+		operators:      opers,
 		signals:        make(chan os.Signal, len(SERVER_SIGNALS)),
 		rehashSignal:   make(chan os.Signal, 1),
 		whoWas:         NewWhoWasList(config.Limits.WhowasEntries),
@@ -874,17 +887,24 @@ func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
 		client.Send(nil, server.name, ERR_PASSWDMISMATCH, client.nick, "Password incorrect")
 		return true
 	}
-	hash := server.operators[name]
+	hash := server.operators[name].Pass
 	password := []byte(msg.Params[1])
 
 	err = ComparePassword(hash, password)
 
 	if (hash == nil) || (err != nil) {
+		fmt.Println("2", hash)
 		client.Send(nil, server.name, ERR_PASSWDMISMATCH, client.nick, "Password incorrect")
 		return true
 	}
 
 	client.flags[Operator] = true
+	client.operName = name
+	client.class = server.operators[name].Class
+	server.currentOpers[client] = true
+
+	//TODO(dan): push out CHGHOST if vhost is applied
+
 	client.Send(nil, server.name, RPL_YOUREOPER, client.nick, "You are now an IRC operator")
 	//TODO(dan): Should this be sent automagically as part of setting the flag/mode?
 	modech := ModeChanges{&ModeChange{
@@ -906,6 +926,22 @@ func (server *Server) rehash() error {
 		return fmt.Errorf("Error rehashing config file: %s", err.Error())
 	}
 
+	// confirm operator stuff all exists and is fine
+	operclasses, err := config.OperatorClasses()
+	if err != nil {
+		return fmt.Errorf("Error rehashing config file: %s", err.Error())
+	}
+	opers, err := config.Operators(operclasses)
+	if err != nil {
+		return fmt.Errorf("Error rehashing config file: %s", err.Error())
+	}
+	for client := range server.currentOpers {
+		_, exists := opers[client.operName]
+		if !exists {
+			return fmt.Errorf("Oper [%s] no longer exists (used by client [%s])", client.operName, client.nickMaskString)
+		}
+	}
+
 	// setup new and removed caps
 	addedCaps := make(CapabilitySet)
 	removedCaps := make(CapabilitySet)
@@ -955,7 +991,8 @@ func (server *Server) rehash() error {
 		NickLen:        int(config.Limits.NickLen),
 		TopicLen:       int(config.Limits.TopicLen),
 	}
-	server.operators = config.Operators()
+	server.operclasses = *operclasses
+	server.operators = opers
 	server.checkIdent = config.Server.CheckIdent
 
 	// registration

oragono.yaml

@@ -59,10 +59,56 @@ registration:
         enabled-callbacks:
             - none # no verification needed, will instantly register successfully
 
+# operator classes
+oper-classes:
+    # local operator
+    "local-oper":
+        # title shown in WHOIS
+        title: Local Operator
+
+        # capability names
+        capabilities:
+            - "oper:local_kill"
+            - "oper:local_ban"
+            - "oper:local_unban"
+
+    # network operator
+    "network-oper":
+        # title shown in WHOIS
+        title: Network Operator
+
+        # oper class this extends from
+        extends: "local-oper"
+
+        # capability names
+        capabilities:
+            - "oper:remote_kill"
+            - "oper:remote_ban"
+            - "oper:remote_unban"
+
+    # server admin
+    "server-admin":
+        # title shown in WHOIS
+        title: Server Admin
+
+        # oper class this extends from
+        extends: "local-oper"
+
+        # capability names
+        capabilities:
+            - "oper:rehash"
+            - "oper:die"
+
 # ircd operators
-operator:
+opers:
     # operator named 'dan'
     dan:
+        # which capabilities this oper has access to
+        class: "server-admin"
+
+        # custom hostname
+        vhost: "n"
+
         # password to login with /OPER command
         # generated using  "oragono genpasswd"
         password: JDJhJDA0JE1vZmwxZC9YTXBhZ3RWT2xBbkNwZnV3R2N6VFUwQUI0RUJRVXRBRHliZVVoa0VYMnlIaGsu