forked from cardigann/cardigann
/
token.go
43 lines (35 loc) · 921 Bytes
/
token.go
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package server
import (
"errors"
"fmt"
"time"
"github.com/dgrijalva/jwt-go"
)
type token struct {
Site string `json:"s,omitempty"`
Link string `json:"l,omitempty"`
}
func (t *token) Encode(sharedKey []byte) (string, error) {
j := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
"s": t.Site,
"l": t.Link,
"nbf": time.Now().Unix(),
})
return j.SignedString(sharedKey)
}
func decodeToken(ts string, sharedKey []byte) (*token, error) {
j, err := jwt.Parse(ts, func(token *jwt.Token) (interface{}, error) {
if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
}
return sharedKey, nil
})
if err != nil {
return nil, err
}
claims, ok := j.Claims.(jwt.MapClaims)
if !ok || !j.Valid {
return nil, errors.New("Invalid token")
}
return &token{claims["s"].(string), claims["l"].(string)}, nil
}