mirror of https://github.com/portainer/portainer
119 lines
3.2 KiB
Go
119 lines
3.2 KiB
Go
package jwt
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import (
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"errors"
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portainer "github.com/portainer/portainer/api"
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"fmt"
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"time"
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"github.com/dgrijalva/jwt-go"
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"github.com/gorilla/securecookie"
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)
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// Service represents a service for managing JWT tokens.
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type Service struct {
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secret []byte
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userSessionTimeout time.Duration
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dataStore portainer.DataStore
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}
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type claims struct {
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UserID int `json:"id"`
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Username string `json:"username"`
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Role int `json:"role"`
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jwt.StandardClaims
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}
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var (
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errSecretGeneration = errors.New("Unable to generate secret key")
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errInvalidJWTToken = errors.New("Invalid JWT token")
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)
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// NewService initializes a new service. It will generate a random key that will be used to sign JWT tokens.
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func NewService(userSessionDuration string, dataStore portainer.DataStore) (*Service, error) {
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userSessionTimeout, err := time.ParseDuration(userSessionDuration)
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if err != nil {
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return nil, err
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}
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secret := securecookie.GenerateRandomKey(32)
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if secret == nil {
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return nil, errSecretGeneration
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}
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service := &Service{
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secret,
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userSessionTimeout,
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dataStore,
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}
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return service, nil
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}
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func (service *Service) defaultExpireAt() (int64) {
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return time.Now().Add(service.userSessionTimeout).Unix()
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}
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// GenerateToken generates a new JWT token.
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func (service *Service) GenerateToken(data *portainer.TokenData) (string, error) {
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return service.generateSignedToken(data, service.defaultExpireAt())
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}
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// GenerateTokenForOAuth generates a new JWT for OAuth login
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// token expiry time from the OAuth provider is considered
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func (service *Service) GenerateTokenForOAuth(data *portainer.TokenData, expiryTime *time.Time) (string, error) {
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expireAt := service.defaultExpireAt()
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if expiryTime != nil && !expiryTime.IsZero() {
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expireAt = expiryTime.Unix()
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}
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return service.generateSignedToken(data, expireAt)
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}
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// ParseAndVerifyToken parses a JWT token and verify its validity. It returns an error if token is invalid.
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func (service *Service) ParseAndVerifyToken(token string) (*portainer.TokenData, error) {
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parsedToken, err := jwt.ParseWithClaims(token, &claims{}, func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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msg := fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
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return nil, msg
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}
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return service.secret, nil
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})
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if err == nil && parsedToken != nil {
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if cl, ok := parsedToken.Claims.(*claims); ok && parsedToken.Valid {
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tokenData := &portainer.TokenData{
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ID: portainer.UserID(cl.UserID),
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Username: cl.Username,
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Role: portainer.UserRole(cl.Role),
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}
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return tokenData, nil
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}
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}
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return nil, errInvalidJWTToken
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}
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// SetUserSessionDuration sets the user session duration
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func (service *Service) SetUserSessionDuration(userSessionDuration time.Duration) {
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service.userSessionTimeout = userSessionDuration
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}
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func (service *Service) generateSignedToken(data *portainer.TokenData, expiresAt int64) (string, error) {
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cl := claims{
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UserID: int(data.ID),
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Username: data.Username,
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Role: int(data.Role),
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StandardClaims: jwt.StandardClaims{
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ExpiresAt: expiresAt,
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, cl)
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signedToken, err := token.SignedString(service.secret)
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if err != nil {
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return "", err
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}
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return signedToken, nil
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}
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