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- // Copyright (c) 2017 Daniel Oaks <daniel@danieloaks.net>
- // released under the MIT license
-
- package irc
-
- import (
- "fmt"
- "strings"
- )
-
- // TODO: "email" is an oversimplification here; it's actually any callback, e.g.,
- // person@example.com, mailto:person@example.com, tel:16505551234.
- const nickservHelp = `NickServ lets you register and log into a user account.
-
- To register an account:
- /NS REGISTER username email [password]
- Leave out [password] if you're registering using your client certificate fingerprint.
- The server may or may not allow you to register anonymously (by sending * as your
- email address).
-
- To verify an account (if you were sent a verification code):
- /NS VERIFY username code
-
- To unregister an account:
- /NS UNREGISTER [username]
- Leave out [username] if you're unregistering the user you're currently logged in as.
-
- To login to an account:
- /NS IDENTIFY [username password]
- Leave out [username password] to use your client certificate fingerprint. Otherwise,
- the given username and password will be used.`
-
- // extractParam extracts a parameter from the given string, returning the param and the rest of the string.
- func extractParam(line string) (string, string) {
- rawParams := strings.SplitN(strings.TrimSpace(line), " ", 2)
- param0 := rawParams[0]
- var param1 string
- if 1 < len(rawParams) {
- param1 = strings.TrimSpace(rawParams[1])
- }
- return param0, param1
- }
-
- // nickservNoticeHandler handles NOTICEs that NickServ receives.
- func (server *Server) nickservNoticeHandler(client *Client, message string, rb *ResponseBuffer) {
- // do nothing
- }
-
- // nickservPrivmsgHandler handles PRIVMSGs that NickServ receives.
- func (server *Server) nickservPrivmsgHandler(client *Client, message string, rb *ResponseBuffer) {
- command, params := extractParam(message)
- command = strings.ToLower(command)
-
- if command == "help" {
- for _, line := range strings.Split(nickservHelp, "\n") {
- rb.Notice(line)
- }
- } else if command == "register" {
- // get params
- username, afterUsername := extractParam(params)
- email, passphrase := extractParam(afterUsername)
- server.nickservRegisterHandler(client, username, email, passphrase, rb)
- } else if command == "verify" {
- username, code := extractParam(params)
- server.nickservVerifyHandler(client, username, code, rb)
- } else if command == "identify" {
- username, passphrase := extractParam(params)
- server.nickservIdentifyHandler(client, username, passphrase, rb)
- } else if command == "unregister" {
- username, _ := extractParam(params)
- server.nickservUnregisterHandler(client, username, rb)
- } else {
- rb.Notice(client.t("Command not recognised. To see the available commands, run /NS HELP"))
- }
- }
-
- func (server *Server) nickservUnregisterHandler(client *Client, username string, rb *ResponseBuffer) {
- if !server.AccountConfig().Registration.Enabled {
- rb.Notice(client.t("Account registration has been disabled"))
- return
- }
-
- if username == "" {
- username = client.Account()
- }
- if username == "" {
- rb.Notice(client.t("You're not logged into an account"))
- return
- }
- cfname, err := CasefoldName(username)
- if err != nil {
- rb.Notice(client.t("Invalid username"))
- return
- }
- if !(cfname == client.Account() || client.HasRoleCapabs("unregister")) {
- rb.Notice(client.t("Insufficient oper privs"))
- return
- }
-
- if cfname == client.Account() {
- client.server.accounts.Logout(client)
- }
-
- err = server.accounts.Unregister(cfname)
- if err == errAccountDoesNotExist {
- rb.Notice(client.t(err.Error()))
- } else if err != nil {
- rb.Notice(client.t("Error while unregistering account"))
- } else {
- rb.Notice(fmt.Sprintf(client.t("Successfully unregistered account %s"), cfname))
- }
- }
-
- func (server *Server) nickservVerifyHandler(client *Client, username string, code string, rb *ResponseBuffer) {
- err := server.accounts.Verify(client, username, code)
-
- var errorMessage string
- if err == errAccountVerificationInvalidCode || err == errAccountAlreadyVerified {
- errorMessage = err.Error()
- } else if err != nil {
- errorMessage = errAccountVerificationFailed.Error()
- }
-
- if errorMessage != "" {
- rb.Notice(client.t(errorMessage))
- return
- }
-
- sendSuccessfulRegResponse(client, rb, true)
- }
-
- func (server *Server) nickservRegisterHandler(client *Client, username, email, passphrase string, rb *ResponseBuffer) {
- if !server.AccountConfig().Registration.Enabled {
- rb.Notice(client.t("Account registration has been disabled"))
- return
- }
-
- if username == "" {
- rb.Notice(client.t("No username supplied"))
- return
- }
-
- certfp := client.certfp
- if passphrase == "" && certfp == "" {
- rb.Notice(client.t("You need to either supply a passphrase or be connected via TLS with a client cert"))
- return
- }
-
- if client.LoggedIntoAccount() {
- if server.AccountConfig().Registration.AllowMultiplePerConnection {
- server.accounts.Logout(client)
- } else {
- rb.Notice(client.t("You're already logged into an account"))
- return
- }
- }
-
- config := server.AccountConfig()
- var callbackNamespace, callbackValue string
- noneCallbackAllowed := false
- for _, callback := range(config.Registration.EnabledCallbacks) {
- if callback == "*" {
- noneCallbackAllowed = true
- }
- }
- // XXX if ACC REGISTER allows registration with the `none` callback, then ignore
- // any callback that was passed here (to avoid confusion in the case where the ircd
- // has no mail server configured). otherwise, register using the provided callback:
- if noneCallbackAllowed {
- callbackNamespace = "*"
- } else {
- callbackNamespace, callbackValue = parseCallback(email, config)
- if callbackNamespace == "" {
- rb.Notice(client.t("Registration requires a valid e-mail address"))
- return
- }
- }
-
- // get and sanitise account name
- account := strings.TrimSpace(username)
-
- err := server.accounts.Register(client, account, callbackNamespace, callbackValue, passphrase, client.certfp)
- if err == nil {
- if callbackNamespace == "*" {
- err = server.accounts.Verify(client, account, "")
- if err == nil {
- sendSuccessfulRegResponse(client, rb, true)
- }
- } else {
- messageTemplate := client.t("Account created, pending verification; verification code has been sent to %s:%s")
- message := fmt.Sprintf(messageTemplate, callbackNamespace, callbackValue)
- rb.Notice(message)
- }
- }
-
- // details could not be stored and relevant numerics have been dispatched, abort
- if err != nil {
- errMsg := "Could not register"
- if err == errCertfpAlreadyExists {
- errMsg = "An account already exists for your certificate fingerprint"
- } else if err == errAccountAlreadyRegistered {
- errMsg = "Account already exists"
- }
- rb.Notice(client.t(errMsg))
- return
- }
- }
-
- func (server *Server) nickservIdentifyHandler(client *Client, username, passphrase string, rb *ResponseBuffer) {
- // fail out if we need to
- if !server.AccountConfig().AuthenticationEnabled {
- rb.Notice(client.t("Login has been disabled"))
- return
- }
-
- loginSuccessful := false
-
- // try passphrase
- if username != "" && passphrase != "" {
- err := server.accounts.AuthenticateByPassphrase(client, username, passphrase)
- loginSuccessful = (err == nil)
- }
-
- // try certfp
- if !loginSuccessful && client.certfp != "" {
- err := server.accounts.AuthenticateByCertFP(client)
- loginSuccessful = (err == nil)
- }
-
- if loginSuccessful {
- sendSuccessfulSaslAuth(client, rb, true)
- } else {
- rb.Notice(client.t("Could not login with your TLS certificate or supplied username/password"))
- }
- }
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