83 lines
1.9 KiB
Go
83 lines
1.9 KiB
Go
package jwt
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import (
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"errors"
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"fmt"
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"strconv"
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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 Claims struct {
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Sub string `json:"sub"`
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Type string `json:"type"`
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jwt.RegisteredClaims
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}
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func GenerateAccessToken(userID int, secret string) (string, error) {
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now := time.Now()
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claims := Claims{
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Sub: strconv.Itoa(userID),
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Type: "access",
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RegisteredClaims: jwt.RegisteredClaims{
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ID: uuid.New().String(),
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IssuedAt: jwt.NewNumericDate(now),
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ExpiresAt: jwt.NewNumericDate(now.Add(15 * time.Minute)),
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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(secret))
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}
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func GenerateRefreshToken(userID int, secret string) (string, error) {
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now := time.Now()
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claims := Claims{
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Sub: strconv.Itoa(userID),
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Type: "refresh",
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RegisteredClaims: jwt.RegisteredClaims{
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ID: uuid.New().String(),
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IssuedAt: jwt.NewNumericDate(now),
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ExpiresAt: jwt.NewNumericDate(now.Add(30 * 24 * time.Hour)),
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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(secret))
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}
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func ValidateToken(tokenString, secret string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, 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 []byte(secret), 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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if claims, ok := token.Claims.(*Claims); ok && token.Valid {
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return claims, nil
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}
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return nil, errors.New("invalid token")
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}
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func GetUserIDFromToken(tokenString, secret string) (int, error) {
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claims, err := ValidateToken(tokenString, secret)
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if err != nil {
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return 0, err
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}
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userID, err := strconv.Atoi(claims.Sub)
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if err != nil {
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return 0, fmt.Errorf("invalid user ID in token: %w", err)
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}
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return userID, nil
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}
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