frp/pkg/auth/token.go

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// Copyright 2020 guylewin, guy@lewin.co.il
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package auth
import (
"fmt"
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"slices"
"time"
v1 "github.com/fatedier/frp/pkg/config/v1"
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"github.com/fatedier/frp/pkg/msg"
"github.com/fatedier/frp/pkg/util/util"
)
type TokenAuthSetterVerifier struct {
additionalAuthScopes []v1.AuthScope
token string
}
func NewTokenAuth(additionalAuthScopes []v1.AuthScope, token string) *TokenAuthSetterVerifier {
return &TokenAuthSetterVerifier{
additionalAuthScopes: additionalAuthScopes,
token: token,
}
}
func (auth *TokenAuthSetterVerifier) SetLogin(loginMsg *msg.Login) error {
loginMsg.PrivilegeKey = util.GetAuthKey(auth.token, loginMsg.Timestamp)
return nil
}
func (auth *TokenAuthSetterVerifier) SetPing(pingMsg *msg.Ping) error {
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if !slices.Contains(auth.additionalAuthScopes, v1.AuthScopeHeartBeats) {
return nil
}
pingMsg.Timestamp = time.Now().Unix()
pingMsg.PrivilegeKey = util.GetAuthKey(auth.token, pingMsg.Timestamp)
return nil
}
func (auth *TokenAuthSetterVerifier) SetNewWorkConn(newWorkConnMsg *msg.NewWorkConn) error {
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if !slices.Contains(auth.additionalAuthScopes, v1.AuthScopeNewWorkConns) {
return nil
}
newWorkConnMsg.Timestamp = time.Now().Unix()
newWorkConnMsg.PrivilegeKey = util.GetAuthKey(auth.token, newWorkConnMsg.Timestamp)
return nil
}
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func (auth *TokenAuthSetterVerifier) VerifyLogin(m *msg.Login) error {
if !util.ConstantTimeEqString(util.GetAuthKey(auth.token, m.Timestamp), m.PrivilegeKey) {
return fmt.Errorf("token in login doesn't match token from configuration")
}
return nil
}
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func (auth *TokenAuthSetterVerifier) VerifyPing(m *msg.Ping) error {
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if !slices.Contains(auth.additionalAuthScopes, v1.AuthScopeHeartBeats) {
return nil
}
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if !util.ConstantTimeEqString(util.GetAuthKey(auth.token, m.Timestamp), m.PrivilegeKey) {
return fmt.Errorf("token in heartbeat doesn't match token from configuration")
}
return nil
}
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func (auth *TokenAuthSetterVerifier) VerifyNewWorkConn(m *msg.NewWorkConn) error {
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if !slices.Contains(auth.additionalAuthScopes, v1.AuthScopeNewWorkConns) {
return nil
}
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if !util.ConstantTimeEqString(util.GetAuthKey(auth.token, m.Timestamp), m.PrivilegeKey) {
return fmt.Errorf("token in NewWorkConn doesn't match token from configuration")
}
return nil
}