64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
package auth
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import (
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"errors"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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var ErrInvalidToken = errors.New("token invalide")
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// Claims du token Omnex : porte le rôle et l'identifiant de session Redis (sid).
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// La signature (secret) authentifie le token ; le sid permet la révocation.
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type Claims struct {
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Role Role `json:"role"`
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Username string `json:"username"`
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SessionID string `json:"sid"`
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jwt.RegisteredClaims
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}
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// Issuer signe et vérifie des JWT HS256.
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type Issuer struct {
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secret []byte
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ttl time.Duration
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}
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func NewIssuer(secret []byte, ttl time.Duration) *Issuer {
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return &Issuer{secret: secret, ttl: ttl}
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}
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// Issue crée un token pour un utilisateur, lié à une session Redis (sid).
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func (i *Issuer) Issue(userID string, username string, role Role, sid string) (string, error) {
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now := time.Now()
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claims := Claims{
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Role: role,
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SessionID: sid,
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Username: username,
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RegisteredClaims: jwt.RegisteredClaims{
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Subject: userID,
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IssuedAt: jwt.NewNumericDate(now),
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ExpiresAt: jwt.NewNumericDate(now.Add(i.ttl)),
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NotBefore: jwt.NewNumericDate(now),
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Issuer: "omnex",
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},
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}
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return jwt.NewWithClaims(jwt.SigningMethodHS256, claims).SignedString(i.secret)
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}
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// Verify valide la signature + l'expiration et renvoie les claims.
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func (i *Issuer) Verify(tokenStr string) (*Claims, error) {
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claims := &Claims{}
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_, err := jwt.ParseWithClaims(tokenStr, claims, func(t *jwt.Token) (any, error) {
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// Refuse tout algo autre que HS256 (protection alg-confusion).
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, ErrInvalidToken
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}
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return i.secret, nil
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})
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if err != nil {
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return nil, ErrInvalidToken
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}
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return claims, nil
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}
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