Open Source Release
61 lines
1.7 KiB
Go
61 lines
1.7 KiB
Go
package auth
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import (
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"fmt"
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"os"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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type Claims struct {
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StaffID string `json:"staff_id"`
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Name string `json:"name"`
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Role string `json:"role"`
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Permissions []string `json:"permissions"`
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jwt.RegisteredClaims
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}
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// GenerateAccessToken bakes the role's permission set into the token at
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// login time (see auth.Login, which looks it up via a join to roles) —
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// RequirePermission then checks the claim directly, no DB round-trip per
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// request. A role's permissions changing takes effect on the holder's next
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// login, same tradeoff RequireRole's plain role string already had.
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func GenerateAccessToken(staffID, name, role string, permissions []string) (string, error) {
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secret := os.Getenv("JWT_SECRET")
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exp, err := time.ParseDuration(os.Getenv("JWT_EXPIRES_IN"))
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if err != nil {
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exp = 12 * time.Hour
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}
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claims := Claims{
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StaffID: staffID,
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Name: name,
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Role: role,
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Permissions: permissions,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(exp)),
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IssuedAt: 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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return token.SignedString([]byte(secret))
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}
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func ParseToken(tokenStr string) (*Claims, error) {
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secret := os.Getenv("JWT_SECRET")
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token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(t *jwt.Token) (interface{}, error) {
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", t.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, 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")
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}
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return claims, nil
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}
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