Merge pull request #2158 from slingamn/ircv3bearer.2

remove draft/bearer in favor of IRCV3BEARER

gencapdefs.py

         url="https://github.com/ircv3/ircv3-specifications/pull/527",
         standard="proposed IRCv3",
     ),
-   CapDef(
-        identifier="Bearer",
-        name="draft/bearer",
-        url="https://gist.github.com/slingamn/4fabc7a3d5f335da7bb313a7f0648f37",
-        standard="proposed IRCv3",
-    ),
 ]
 
 def validate_defs():

irc/accounts.go

 	"github.com/tidwall/buntdb"
 	"github.com/xdg-go/scram"
 
-	"github.com/ergochat/ergo/irc/caps"
 	"github.com/ergochat/ergo/irc/connection_limits"
 	"github.com/ergochat/ergo/irc/email"
 	"github.com/ergochat/ergo/irc/migrations"
 		}
 	}
 
-	if strings.HasPrefix(accountName, caps.BearerTokenPrefix) {
-		return am.AuthenticateByBearerToken(client, strings.TrimPrefix(accountName, caps.BearerTokenPrefix), passphrase)
-	}
-
 	if throttled, remainingTime := client.checkLoginThrottle(); throttled {
 		return &ThrottleError{remainingTime}
 	}
 func (am *AccountManager) AuthenticateByOAuthBearer(client *Client, opts oauth2.OAuthBearerOptions) (err error) {
 	config := am.server.Config()
 
-	// we need to check this here since we can get here via SASL PLAIN:
 	if !config.Accounts.OAuth2.Enabled {
 		return errFeatureDisabled
 	}
 
+	if throttled, remainingTime := client.checkLoginThrottle(); throttled {
+		return &ThrottleError{remainingTime}
+	}
+
 	var username string
 	if config.Accounts.AuthScript.Enabled && config.Accounts.OAuth2.AuthScript {
 		username, err = am.authenticateByOAuthBearerScript(client, config, opts)
 		"EXTERNAL":      authExternalHandler,
 		"SCRAM-SHA-256": authScramHandler,
 		"OAUTHBEARER":   authOauthBearerHandler,
+		"IRCV3BEARER":   authIRCv3BearerHandler,
 	}
 )
 

irc/caps/constants.go

 	BotTagName = "bot"
 	// https://ircv3.net/specs/extensions/chathistory
 	ChathistoryTargetsBatchType = "draft/chathistory-targets"
-
-	// draft/bearer defines this prefix namespace for authcids, enabling tunneling bearer tokens
-	// in SASL PLAIN:
-	BearerTokenPrefix = "*bearer*"
 )
 
 func init() {

irc/caps/defs.go

 
 const (
 	// number of recognized capabilities:
-	numCapabs = 35
+	numCapabs = 34
 	// length of the uint32 array that represents the bitset:
 	bitsetLen = 2
 )
 	// https://github.com/ircv3/ircv3-specifications/pull/435
 	AccountRegistration Capability = iota
 
-	// Bearer is the proposed IRCv3 capability named "draft/bearer":
-	// https://gist.github.com/slingamn/4fabc7a3d5f335da7bb313a7f0648f37
-	Bearer Capability = iota
-
 	// ChannelRename is the draft IRCv3 capability named "draft/channel-rename":
 	// https://ircv3.net/specs/extensions/channel-rename
 	ChannelRename Capability = iota
 		"cap-notify",
 		"chghost",
 		"draft/account-registration",
-		"draft/bearer",
 		"draft/channel-rename",
 		"draft/chathistory",
 		"draft/event-playback",

irc/config.go

 		if config.Accounts.OAuth2.Enabled {
 			saslCapValues = append(saslCapValues, "OAUTHBEARER")
 		}
+		if config.Accounts.OAuth2.Enabled || config.Accounts.JWTAuth.Enabled {
+			saslCapValues = append(saslCapValues, "IRCV3BEARER")
+		}
 		config.Server.capValues[caps.SASL] = strings.Join(saslCapValues, ",")
 	} else {
 		config.Server.supportedCaps.Disable(caps.SASL)
 		return nil, fmt.Errorf("oauth2 is enabled with auth-script, but no auth-script is enabled")
 	}
 
-	var bearerCapValues []string
-	if config.Accounts.OAuth2.Enabled {
-		bearerCapValues = append(bearerCapValues, "oauth2")
-	}
-	if config.Accounts.JWTAuth.Enabled {
-		bearerCapValues = append(bearerCapValues, "jwt")
-	}
-	if len(bearerCapValues) != 0 {
-		config.Server.capValues[caps.Bearer] = strings.Join(bearerCapValues, ",")
-	} else {
-		config.Server.supportedCaps.Disable(caps.Bearer)
-	}
-
 	if !config.Accounts.Registration.Enabled {
 		config.Server.supportedCaps.Disable(caps.AccountRegistration)
 	} else {

irc/handlers.go

 	return false
 }
 
+// AUTHENTICATE IRCV3BEARER
+func authIRCv3BearerHandler(server *Server, client *Client, session *Session, value []byte, rb *ResponseBuffer) bool {
+	defer session.sasl.Clear()
+
+	// <authzid> \x00 <type> \x00 <token>
+	splitValue := bytes.SplitN(value, []byte{'\000'}, 3)
+	if len(splitValue) != 3 {
+		rb.Add(nil, server.name, ERR_SASLFAIL, client.Nick(), client.t("SASL authentication failed: Invalid auth blob"))
+		return false
+	}
+
+	err := server.accounts.AuthenticateByBearerToken(client, string(splitValue[1]), string(splitValue[2]))
+	if err != nil {
+		sendAuthErrorResponse(client, rb, err)
+		return false
+	}
+
+	sendSuccessfulAccountAuth(nil, client, rb, true)
+	return false
+}
+
 func sendAuthErrorResponse(client *Client, rb *ResponseBuffer, err error) {
 	msg := authErrorToMessage(client.server, err)
 	rb.Add(nil, client.server.name, ERR_SASLFAIL, client.nick, fmt.Sprintf("%s: %s", client.t("SASL authentication failed"), client.t(msg)))