|
|
package auth
|
|
|
|
|
|
import (
|
|
|
"bytes"
|
|
|
"fmt"
|
|
|
"io/ioutil"
|
|
|
"net/http"
|
|
|
"net/url"
|
|
|
"sort"
|
|
|
"strings"
|
|
|
"time"
|
|
|
|
|
|
model "github.com/cloudreve/Cloudreve/v3/models"
|
|
|
"github.com/cloudreve/Cloudreve/v3/pkg/conf"
|
|
|
"github.com/cloudreve/Cloudreve/v3/pkg/serializer"
|
|
|
"github.com/cloudreve/Cloudreve/v3/pkg/util"
|
|
|
)
|
|
|
|
|
|
var (
|
|
|
ErrAuthFailed = serializer.NewError(serializer.CodeInvalidSign, "invalid sign", nil)
|
|
|
ErrAuthHeaderMissing = serializer.NewError(serializer.CodeNoPermissionErr, "authorization header is missing", nil)
|
|
|
ErrExpiresMissing = serializer.NewError(serializer.CodeNoPermissionErr, "expire timestamp is missing", nil)
|
|
|
ErrExpired = serializer.NewError(serializer.CodeSignExpired, "signature expired", nil)
|
|
|
)
|
|
|
|
|
|
const CrHeaderPrefix = "X-Cr-"
|
|
|
|
|
|
// General 通用的认证接口
|
|
|
var General Auth
|
|
|
|
|
|
// Auth 鉴权认证
|
|
|
type Auth interface {
|
|
|
// 对给定Body进行签名,expires为0表示永不过期
|
|
|
Sign(body string, expires int64) string
|
|
|
// 对给定Body和Sign进行检查
|
|
|
Check(body string, sign string) error
|
|
|
}
|
|
|
|
|
|
// SignRequest 对PUT\POST等复杂HTTP请求签名，只会对URI部分、
|
|
|
// 请求正文、`X-Cr-`开头的header进行签名
|
|
|
func SignRequest(instance Auth, r *http.Request, expires int64) *http.Request {
|
|
|
// 处理有效期
|
|
|
if expires > 0 {
|
|
|
expires += time.Now().Unix()
|
|
|
}
|
|
|
|
|
|
// 生成签名
|
|
|
sign := instance.Sign(getSignContent(r), expires)
|
|
|
|
|
|
// 将签名加到请求Header中
|
|
|
r.Header["Authorization"] = []string{"Bearer " + sign}
|
|
|
return r
|
|
|
}
|
|
|
|
|
|
// CheckRequest 对复杂请求进行签名验证
|
|
|
func CheckRequest(instance Auth, r *http.Request) error {
|
|
|
var (
|
|
|
sign []string
|
|
|
ok bool
|
|
|
)
|
|
|
if sign, ok = r.Header["Authorization"]; !ok || len(sign) == 0 {
|
|
|
return ErrAuthHeaderMissing
|
|
|
}
|
|
|
sign[0] = strings.TrimPrefix(sign[0], "Bearer ")
|
|
|
|
|
|
return instance.Check(getSignContent(r), sign[0])
|
|
|
}
|
|
|
|
|
|
// getSignContent 签名请求 path、正文、以`X-`开头的 Header. 如果请求 path 为从机上传 API，
|
|
|
// 则不对正文签名。返回待签名/验证的字符串
|
|
|
func getSignContent(r *http.Request) (rawSignString string) {
|
|
|
// 读取所有body正文
|
|
|
var body = []byte{}
|
|
|
if !strings.Contains(r.URL.Path, "/api/v3/slave/upload/") {
|
|
|
if r.Body != nil {
|
|
|
body, _ = ioutil.ReadAll(r.Body)
|
|
|
_ = r.Body.Close()
|
|
|
r.Body = ioutil.NopCloser(bytes.NewReader(body))
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// 决定要签名的header
|
|
|
var signedHeader []string
|
|
|
for k, _ := range r.Header {
|
|
|
if strings.HasPrefix(k, CrHeaderPrefix) && k != CrHeaderPrefix+"Filename" {
|
|
|
signedHeader = append(signedHeader, fmt.Sprintf("%s=%s", k, r.Header.Get(k)))
|
|
|
}
|
|
|
}
|
|
|
sort.Strings(signedHeader)
|
|
|
|
|
|
// 读取所有待签名Header
|
|
|
rawSignString = serializer.NewRequestSignString(r.URL.Path, strings.Join(signedHeader, "&"), string(body))
|
|
|
|
|
|
return rawSignString
|
|
|
}
|
|
|
|
|
|
// SignURI 对URI进行签名,签名只针对Path部分，query部分不做验证
|
|
|
func SignURI(instance Auth, uri string, expires int64) (*url.URL, error) {
|
|
|
// 处理有效期
|
|
|
if expires != 0 {
|
|
|
expires += time.Now().Unix()
|
|
|
}
|
|
|
|
|
|
base, err := url.Parse(uri)
|
|
|
if err != nil {
|
|
|
return nil, err
|
|
|
}
|
|
|
|
|
|
// 生成签名
|
|
|
sign := instance.Sign(base.Path, expires)
|
|
|
|
|
|
// 将签名加到URI中
|
|
|
queries := base.Query()
|
|
|
queries.Set("sign", sign)
|
|
|
base.RawQuery = queries.Encode()
|
|
|
|
|
|
return base, nil
|
|
|
}
|
|
|
|
|
|
// CheckURI 对URI进行鉴权
|
|
|
func CheckURI(instance Auth, url *url.URL) error {
|
|
|
//获取待验证的签名正文
|
|
|
queries := url.Query()
|
|
|
sign := queries.Get("sign")
|
|
|
queries.Del("sign")
|
|
|
url.RawQuery = queries.Encode()
|
|
|
|
|
|
return instance.Check(url.Path, sign)
|
|
|
}
|
|
|
|
|
|
// Init 初始化通用鉴权器
|
|
|
func Init() {
|
|
|
var secretKey string
|
|
|
if conf.SystemConfig.Mode == "master" {
|
|
|
secretKey = model.GetSettingByName("secret_key")
|
|
|
} else {
|
|
|
secretKey = conf.SlaveConfig.Secret
|
|
|
if secretKey == "" {
|
|
|
util.Log().Panic("SlaveSecret is not set, please specify it in config file.")
|
|
|
}
|
|
|
}
|
|
|
General = HMACAuth{
|
|
|
SecretKey: []byte(secretKey),
|
|
|
}
|
|
|
}
|
