103 lines
2.4 KiB
Go
103 lines
2.4 KiB
Go
package jwt
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import (
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v5"
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"github.com/google/uuid"
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)
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const (
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TokenTypeAuth = "auth"
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TokenTypeRefresh = "refresh"
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)
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type Claims struct {
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UserID string `json:"userId"`
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Username string `json:"username"`
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TokenType string `json:"tokenType"`
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jwt.RegisteredClaims
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}
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type JWTManager struct {
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secret []byte
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authTTL time.Duration
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refreshTTL time.Duration
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}
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func NewJWTManager(secret string, authTTL, refreshTTL time.Duration) *JWTManager {
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return &JWTManager{
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secret: []byte(secret),
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authTTL: authTTL,
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refreshTTL: refreshTTL,
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}
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}
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func (m *JWTManager) GenerateAuthToken(userID string, username string) (string, error) {
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return m.generate(userID, username, TokenTypeAuth, m.authTTL)
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}
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func (m *JWTManager) GenerateRefreshToken(userID string, username string) (string, error) {
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return m.generate(userID, username, TokenTypeRefresh, m.refreshTTL)
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}
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func (m *JWTManager) generate(userID string, username, tokenType string, ttl time.Duration) (string, error) {
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now := time.Now()
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claims := Claims{
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UserID: userID,
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Username: username,
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TokenType: tokenType,
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RegisteredClaims: jwt.RegisteredClaims{
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IssuedAt: jwt.NewNumericDate(now),
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ExpiresAt: jwt.NewNumericDate(now.Add(ttl)),
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Subject: userID,
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ID: uuid.NewString(),
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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(m.secret)
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}
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func (m *JWTManager) ParseAuthToken(tokenStr string) (*Claims, error) {
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claims, err := m.parse(tokenStr)
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if err != nil {
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return nil, err
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}
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if claims.TokenType != TokenTypeAuth {
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return nil, fmt.Errorf("invalid token type")
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}
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return claims, nil
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}
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func (m *JWTManager) ParseRefreshToken(tokenStr string) (*Claims, error) {
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claims, err := m.parse(tokenStr)
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if err != nil {
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return nil, err
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}
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if claims.TokenType != TokenTypeRefresh {
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return nil, fmt.Errorf("invalid token type")
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}
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return claims, nil
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}
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func (m *JWTManager) parse(tokenStr string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(token *jwt.Token) (any, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method")
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}
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return m.secret, nil
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})
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if err != nil {
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return nil, 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")
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}
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return claims, nil
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}
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