Torjus Håkestad
790cc43949
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70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
package gpaste
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import (
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"fmt"
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"time"
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"github.com/golang-jwt/jwt"
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"github.com/google/uuid"
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)
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type AuthLevel int
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const (
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AuthLevelUnset AuthLevel = iota
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AuthLevelUser
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AuthLevelAdmin
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)
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type AuthService struct {
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users UserStore
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hmacSecret []byte
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}
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func NewAuthService(store UserStore, signingSecret []byte) *AuthService {
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return &AuthService{users: store, hmacSecret: signingSecret}
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}
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func (as *AuthService) Login(username, password string) (string, error) {
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user, err := as.users.Get(username)
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if err != nil {
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return "", err
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}
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if err := user.ValidatePassword(password); err != nil {
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return "", err
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}
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// TODO: Set iss and aud
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claims := jwt.StandardClaims{
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Subject: user.Username,
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ExpiresAt: time.Now().Add(7 * 24 * time.Hour).Unix(),
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NotBefore: time.Now().Unix(),
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IssuedAt: time.Now().Unix(),
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Id: uuid.NewString(),
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}
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token := jwt.NewWithClaims(jwt.GetSigningMethod("HS256"), claims)
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signed, err := token.SignedString(as.hmacSecret)
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if err != nil {
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return "", err
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}
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return signed, nil
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}
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func (as *AuthService) ValidateToken(rawToken string) (*jwt.StandardClaims, error) {
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claims := &jwt.StandardClaims{}
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token, err := jwt.ParseWithClaims(rawToken, claims, func(t *jwt.Token) (interface{}, error) {
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return as.hmacSecret, 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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if !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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