114 lines
3.3 KiB
Go
114 lines
3.3 KiB
Go
package jwt
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import (
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"crypto/rand"
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"encoding/hex"
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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// Claims содержит данные JWT токена
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type Claims struct {
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UserID int64 `json:"user_id"`
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Email string `json:"email"`
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jwt.RegisteredClaims
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}
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// Manager управляет JWT токенами
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type Manager struct {
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secretKey string
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accessTokenDuration time.Duration
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refreshTokenDuration time.Duration
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}
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// NewManager создает новый JWT менеджер
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func NewManager(secretKey string, accessDuration, refreshDuration time.Duration) *Manager {
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return &Manager{
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secretKey: secretKey,
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accessTokenDuration: accessDuration,
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refreshTokenDuration: refreshDuration,
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}
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}
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// GenerateAccessToken генерирует access токен
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func (m *Manager) GenerateAccessToken(userID int64, email string) (string, error) {
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claims := Claims{
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UserID: userID,
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Email: email,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(m.accessTokenDuration)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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NotBefore: jwt.NewNumericDate(time.Now()),
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString([]byte(m.secretKey))
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}
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// GenerateRefreshToken генерирует refresh токен
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func (m *Manager) GenerateRefreshToken(userID int64, email string) (string, error) {
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// Генерируем уникальный ID для токена
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jti, err := generateJTI()
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if err != nil {
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return "", fmt.Errorf("failed to generate jti: %w", err)
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}
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claims := Claims{
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UserID: userID,
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Email: email,
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RegisteredClaims: jwt.RegisteredClaims{
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ID: jti,
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(m.refreshTokenDuration)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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NotBefore: jwt.NewNumericDate(time.Now()),
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString([]byte(m.secretKey))
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}
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// generateJTI генерирует уникальный ID для JWT токена
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func generateJTI() (string, error) {
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bytes := make([]byte, 16)
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if _, err := rand.Read(bytes); err != nil {
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return "", err
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}
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return hex.EncodeToString(bytes), nil
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}
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// ValidateToken валидирует токен и возвращает claims
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func (m *Manager) ValidateToken(tokenString string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
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// Проверяем метод подписи
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return []byte(m.secretKey), nil
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})
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if err != nil {
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return nil, fmt.Errorf("failed to parse token: %w", err)
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}
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claims, ok := token.Claims.(*Claims)
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if !ok || !token.Valid {
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return nil, fmt.Errorf("invalid token claims")
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}
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return claims, nil
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}
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// GetExpirationTime возвращает время истечения access токена
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func (m *Manager) GetAccessTokenDuration() time.Duration {
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return m.accessTokenDuration
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}
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// GetRefreshTokenDuration возвращает время истечения refresh токена
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func (m *Manager) GetRefreshTokenDuration() time.Duration {
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return m.refreshTokenDuration
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}
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