75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package auth
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import (
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"context"
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"strings"
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"time"
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"github.com/golang-jwt/jwt/v4"
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)
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type Claims struct {
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UserID string `json:"user_id"`
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Username string `json:"username"`
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jwt.RegisteredClaims
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}
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type TokenManager struct {
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secretKey string
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}
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func NewTokenManager(secretKey string) *TokenManager {
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return &TokenManager{
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secretKey: secretKey,
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}
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}
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func (tm *TokenManager) CreateToken(userID, username string) (string, error) {
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claims := &Claims{
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UserID: userID,
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Username: username,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
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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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tokenString, err := token.SignedString([]byte(tm.secretKey))
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if err != nil {
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return "", err
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}
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return tokenString, nil
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}
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func (tm *TokenManager) 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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return []byte(tm.secretKey), nil
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})
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if err != nil || !token.Valid {
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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 {
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return nil, jwt.ErrSignatureInvalid
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}
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return claims, nil
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}
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func ExtractToken(ctx context.Context) string {
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// Extract token fromAuthorization header
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authHeader := ctx.Value("Authorization")
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if authHeader != nil {
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header := authHeader.(string)
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if strings.HasPrefix(header, "Bearer ") {
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return strings.TrimPrefix(header, "Bearer ")
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}
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}
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return ""
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}
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