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middleware.go
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middleware.go
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package hertz_laravel
import (
"context"
"encoding/json"
"errors"
"strconv"
"strings"
"github.com/cloudwego/hertz/pkg/app"
"github.com/elliotchance/phpserialize"
"github.com/redis/go-redis/v9"
"github.com/rogerogers/hertz-laravel/utils"
)
type (
cookieValue struct {
Iv string `json:"iv"`
Mac string `json:"mac"`
Value string `json:"value"`
Tag string `json:"tag"`
}
userModel struct {
Id int
Password string
RememberToken string
}
LaravelKey string
sessionModel map[any]any
)
func Auth(options ...Option) app.HandlerFunc {
return func(ctx context.Context, c *app.RequestContext) {
cfg := defaultAuthConfig()
if len(options) > 0 {
for _, o := range options {
o.apply(cfg)
}
}
if utils.InArray(c.FullPath(), cfg.ignorePaths) {
c.Next(ctx)
return
}
userId, err := getUserId(c, cfg)
if err != nil || userId == 0 {
cfg.UnAuthHandler(ctx, c)
return
}
ctx = context.WithValue(ctx, LaravelKey("userId"), userId)
c.Next(ctx)
}
}
func getUserId(c *app.RequestContext, cfg *authConfig) (int, error) {
laravelSession := c.Cookie(cfg.sessionCookieName)
userId, err := getUserIdFromLaravelSession(laravelSession, cfg)
if err != nil {
rememberWeb := c.Cookie(cfg.rememberCookieName)
userId, err = getUserIdFromRememberWeb(rememberWeb, cfg)
if err != nil {
return 0, nil
}
}
return userId, nil
}
func parseCookie(cookie []byte, cfg *authConfig) (string, error) {
decoded, err := utils.B64SafeDecode(cookie)
if err != nil {
return "", err
}
cv := &cookieValue{}
err = json.Unmarshal(decoded, cv)
if err != nil {
return "", err
}
iv, err := utils.B64Decode(cv.Iv)
if err != nil {
return "", err
}
decryptValue, err := utils.Aes256CbcDecrypt(cv.Value, cfg.appKey, iv)
if err != nil {
return "", err
}
return decryptValue, nil
}
func getUserIdFromLaravelSession(cookie []byte, cfg *authConfig) (int, error) {
decryptValue, err := parseCookie(cookie, cfg)
if err != nil {
return 0, err
}
ssArr := strings.Split(decryptValue, "|")
ssId := ssArr[0]
if !cfg.disableEncryptCookies && len(ssArr) == 2 && !utils.InArray(cfg.sessionCookieName, cfg.exceptEncryptCookies) {
ssId = ssArr[1]
}
redisRes := cfg.redisClient.Get(context.Background(), strings.Join([]string{cfg.cachePrefix, ssId}, ""))
if redisRes.Err() == redis.Nil {
return 0, errors.New("401")
}
var payloadByte string
redisResByte, err := redisRes.Bytes()
if err != nil {
return 0, errors.New("401")
}
err = phpserialize.Unmarshal(redisResByte, &payloadByte)
if err != nil {
return 0, errors.New("401")
}
var payload sessionModel
switch cfg.serialization {
case PhpSerialize:
err = phpserialize.Unmarshal([]byte(payloadByte), &payload)
if err != nil {
return 0, errors.New("401")
}
case JsonSerialize:
err = json.Unmarshal([]byte(payloadByte), &payload)
if err != nil {
return 0, errors.New("401")
}
}
userid, ok := payload["login_web_59ba36addc2b2f9401580f014c7f58ea4e30989d"]
if !ok {
return 0, errors.New("401")
}
return int(userid.(int64)), nil
}
func getUserIdFromRememberWeb(cookie []byte, cfg *authConfig) (int, error) {
decryptValue, err := parseCookie(cookie, cfg)
if err != nil {
return 0, err
}
ssArr := strings.Split(decryptValue, "|")
userid, rememberToken, hashedPass := ssArr[0], ssArr[1], ssArr[2]
if !cfg.disableEncryptCookies && len(ssArr) == 4 && !utils.InArray(cfg.rememberCookieName, cfg.exceptEncryptCookies) {
userid, rememberToken, hashedPass = ssArr[1], ssArr[2], ssArr[3]
}
var user userModel
err = cfg.db.Table(cfg.tableName).First(&user, userid).Error
if err != nil {
return 0, err
}
if strconv.Itoa(user.Id) == userid && user.Password == hashedPass && user.RememberToken == rememberToken {
return user.Id, nil
}
return 0, errors.New("401")
}