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generate.go
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generate.go
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package jwts
import (
"fmt"
"time"
"github.com/dgrijalva/jwt-go"
)
const (
issuerService = "com.datalab.service.eventmanager-live"
secretTicket = "secure"
ticketExp = 5 * time.Second
)
var (
ErrInvalidJWT = fmt.Errorf("jwt is no longer valid")
ErrJWTParse = fmt.Errorf("could not parse jwt token")
ErrCorruptJWT = fmt.Errorf("jwt could not be parsed (JWT might be corrupted)")
)
type AppClaims struct {
AppUuid, AppOrigin string
}
func WebSocketTicket(sub, origin, app interface{}) (string, error) {
claims := jwt.MapClaims{
"sub": sub,
"origin": origin,
"app": app,
"iss": issuerService,
"iat": time.Now().Unix(),
"exp": time.Now().Add(ticketExp).Unix(),
}
_token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
token, err := _token.SignedString([]byte(secretTicket))
if err != nil {
return "", fmt.Errorf("[jwts.IssueApp] could not sign token: %v", err)
}
return token, nil
}
func Validate(tokenString string) (jwt.MapClaims, error) {
token, err := verifyToken(tokenString, secretTicket)
if err != nil {
return nil, err
}
claims, ok := token.Claims.(jwt.MapClaims)
if !ok || !token.Valid {
return nil, ErrInvalidJWT
}
return claims, nil
}
func verifyToken(tokenString, secret string) (*jwt.Token, error) {
token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, ErrCorruptJWT
}
return []byte(secret), nil
})
if err != nil {
return nil, ErrJWTParse
}
return token, nil
}