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service_impl.go
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service_impl.go
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package jwtauth
import (
"context"
"net/http"
"time"
"github.com/golang-jwt/jwt"
"github.com/rabee-inc/go-pkg/errcode"
"github.com/rabee-inc/go-pkg/log"
"github.com/rabee-inc/go-pkg/stringutil"
)
type service struct {
signKey []byte
expired time.Duration
}
// CreateToken ... トークンを作成する
func (s *service) CreateToken(ctx context.Context, userID string, customClaims map[string]interface{}) (string, error) {
// 有効期限
now := time.Now()
// トークンを作成
claims := &Claims{
UserID: userID,
CustomClaims: customClaims,
StandardClaims: jwt.StandardClaims{
ExpiresAt: now.Add(s.expired).Unix(),
},
}
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
// 署名
signedToken, err := token.SignedString(s.signKey)
if err != nil {
log.Error(ctx, err)
return "", err
}
return signedToken, nil
}
// Authentication ... 認証を行う
func (s *service) Authentication(ctx context.Context, ah string) (string, map[string]interface{}, error) {
// 署名済みトークンを取得
signedToken := getTokenByAuthHeader(ah)
if signedToken == "" {
err := log.Warninge(ctx, "empty token")
err = errcode.Set(err, http.StatusForbidden)
return "", nil, err
}
// トークンを取得
claims := &Claims{}
token, err := jwt.ParseWithClaims(signedToken, claims, func(token *jwt.Token) (interface{}, error) {
return s.signKey, nil
})
if err != nil {
log.Warning(ctx, err)
return "", nil, err
}
// 有効性を確認
if !token.Valid {
err := log.Warningc(ctx, http.StatusForbidden, "invalid token")
return "", nil, err
}
// 有効期限を確認
now := time.Now().Unix()
if claims.ExpiresAt < now {
err := log.Warningc(ctx, http.StatusForbidden, "expired token")
return "", nil, err
}
return claims.UserID, claims.CustomClaims, nil
}
// NewService ... Serviceを作成する
func NewService(signKey string, expired time.Duration) Service {
bSignKey := stringutil.ToBytes(signKey)
return &service{
signKey: bSignKey,
expired: expired,
}
}