freedakgmail
98 lines
2.4 KiB
Go
98 lines
2.4 KiB
Go
package auth
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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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type TokenPair struct {
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AccessToken string `json:"access_token"`
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RefreshToken string `json:"refresh_token"`
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ExpiresAt int64 `json:"expires_at"`
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}
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type Claims struct {
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UserID uuid.UUID `json:"user_id"`
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Email string `json:"email"`
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Role string `json:"role"`
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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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accessExpiry time.Duration
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refreshExpiry time.Duration
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}
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func NewJWTManager(secret string, accessExpiry, refreshExpiry time.Duration) *JWTManager {
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return &JWTManager{
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secret: []byte(secret),
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accessExpiry: accessExpiry,
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refreshExpiry: refreshExpiry,
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}
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}
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func (m *JWTManager) GenerateTokenPair(userID uuid.UUID, email, role string) (*TokenPair, error) {
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now := time.Now()
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accessExp := now.Add(m.accessExpiry)
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accessClaims := &Claims{
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UserID: userID,
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Email: email,
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Role: role,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(accessExp),
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IssuedAt: jwt.NewNumericDate(now),
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Subject: userID.String(),
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},
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}
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accessToken := jwt.NewWithClaims(jwt.SigningMethodHS256, accessClaims)
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accessStr, err := accessToken.SignedString(m.secret)
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if err != nil {
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return nil, fmt.Errorf("sign access token: %w", err)
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}
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refreshClaims := &Claims{
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UserID: userID,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(now.Add(m.refreshExpiry)),
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IssuedAt: jwt.NewNumericDate(now),
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Subject: userID.String(),
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},
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}
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refreshToken := jwt.NewWithClaims(jwt.SigningMethodHS256, refreshClaims)
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refreshStr, err := refreshToken.SignedString(m.secret)
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if err != nil {
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return nil, fmt.Errorf("sign refresh token: %w", err)
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}
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return &TokenPair{
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AccessToken: accessStr,
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RefreshToken: refreshStr,
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ExpiresAt: accessExp.Unix(),
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}, nil
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}
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func (m *JWTManager) ValidateToken(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: %v", token.Header["alg"])
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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, fmt.Errorf("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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