129 lines
3.0 KiB
Go
129 lines
3.0 KiB
Go
package auth
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import (
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"errors"
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"fmt"
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"slices"
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"time"
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"github.com/golang-jwt/jwt/v5"
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v1 "github.com/fatedier/frp/pkg/config/v1"
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"github.com/fatedier/frp/pkg/msg"
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)
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type JWTAuthSetterVerifier struct {
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additionalAuthScopes []v1.AuthScope
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token string
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secret string
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}
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func NewJWTAuth(additionalAuthScopes []v1.AuthScope, token, secret string) *JWTAuthSetterVerifier {
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return &JWTAuthSetterVerifier{
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additionalAuthScopes: additionalAuthScopes,
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token: token,
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secret: secret,
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}
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}
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func (auth *JWTAuthSetterVerifier) SetLogin(loginMsg *msg.Login) error {
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loginMsg.PrivilegeKey = auth.token
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return nil
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}
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func (auth *JWTAuthSetterVerifier) SetPing(pingMsg *msg.Ping) error {
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if !slices.Contains(auth.additionalAuthScopes, v1.AuthScopeHeartBeats) {
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return nil
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}
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pingMsg.Timestamp = time.Now().Unix()
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pingMsg.PrivilegeKey = auth.token
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return nil
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}
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func (auth *JWTAuthSetterVerifier) SetNewWorkConn(newWorkConnMsg *msg.NewWorkConn) error {
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if !slices.Contains(auth.additionalAuthScopes, v1.AuthScopeNewWorkConns) {
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return nil
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}
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newWorkConnMsg.Timestamp = time.Now().Unix()
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newWorkConnMsg.PrivilegeKey = auth.token
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return nil
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}
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func (auth *JWTAuthSetterVerifier) VerifyLogin(m *msg.Login) error {
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if m.User == "" {
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return errors.New("user is empty")
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}
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token := m.PrivilegeKey
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return auth.VerifyToken(m.User, token)
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}
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func (auth *JWTAuthSetterVerifier) VerifyPing(m *msg.Ping) error {
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if !slices.Contains(auth.additionalAuthScopes, v1.AuthScopeHeartBeats) {
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return nil
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}
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token := m.PrivilegeKey
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return auth.VerifyToken("", token)
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}
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func (auth *JWTAuthSetterVerifier) VerifyNewWorkConn(m *msg.NewWorkConn) error {
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if !slices.Contains(auth.additionalAuthScopes, v1.AuthScopeNewWorkConns) {
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return nil
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}
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token := m.PrivilegeKey
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return auth.VerifyToken("", token)
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}
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func (auth *JWTAuthSetterVerifier) GetVerifyData(token string) (jwt.MapClaims, error) {
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methodKey := map[string]string{jwt.SigningMethodHS256.Alg(): auth.secret}
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parser := jwt.NewParser(jwt.WithValidMethods([]string{jwt.SigningMethodHS256.Name}))
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parsedToken, err := parser.Parse(token, func(t *jwt.Token) (any, error) {
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key, ok := methodKey[t.Method.Alg()]
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if !ok {
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return nil, fmt.Errorf("method %s is not supported", t.Method)
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}
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return []byte(key), nil
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})
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if err != nil {
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if errors.Is(err, jwt.ErrTokenExpired) {
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return nil, errors.New("token is expired")
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}
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return nil, err
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}
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if !parsedToken.Valid {
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return nil, fmt.Errorf("token %s is invalid", token)
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}
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claims, ok := parsedToken.Claims.(jwt.MapClaims)
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if !ok {
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return nil, fmt.Errorf("claims %v is invalid", parsedToken.Claims)
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}
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return claims, nil
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}
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func (auth *JWTAuthSetterVerifier) VerifyToken(user, token string) error {
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claims, err := auth.GetVerifyData(token)
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if err != nil {
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return err
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}
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sub := claims["sub"]
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if sub != "remote_ssh" {
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return fmt.Errorf("token sub is invalid")
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}
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if len(user) > 0 {
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id := claims["aud"]
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if id != user {
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return fmt.Errorf("token %s is not for user %s", token, user)
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}
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}
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return nil
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}
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