mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-19 13:37:49 +08:00
138 lines
3.4 KiB
Go
138 lines
3.4 KiB
Go
package security
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"github.com/seaweedfs/seaweedfs/weed/glog"
|
|
"net"
|
|
"net/http"
|
|
"strings"
|
|
)
|
|
|
|
var (
|
|
ErrUnauthorized = errors.New("unauthorized token")
|
|
)
|
|
|
|
/*
|
|
Guard is to ensure data access security.
|
|
There are 2 ways to check access:
|
|
1. white list. It's checking request ip address.
|
|
2. JSON Web Token(JWT) generated from secretKey.
|
|
The jwt can come from:
|
|
1. url parameter jwt=...
|
|
2. request header "Authorization"
|
|
3. cookie with the name "jwt"
|
|
|
|
The white list is checked first because it is easy.
|
|
Then the JWT is checked.
|
|
|
|
The Guard will also check these claims if provided:
|
|
1. "exp" Expiration Time
|
|
2. "nbf" Not Before
|
|
|
|
Generating JWT:
|
|
1. use HS256 to sign
|
|
2. optionally set "exp", "nbf" fields, in Unix time,
|
|
the number of seconds elapsed since January 1, 1970 UTC.
|
|
|
|
Referenced:
|
|
https://github.com/pkieltyka/jwtauth/blob/master/jwtauth.go
|
|
*/
|
|
type Guard struct {
|
|
whiteListIp map[string]struct{}
|
|
whiteListCIDR map[string]*net.IPNet
|
|
SigningKey SigningKey
|
|
ExpiresAfterSec int
|
|
ReadSigningKey SigningKey
|
|
ReadExpiresAfterSec int
|
|
|
|
isWriteActive bool
|
|
isEmptyWhiteList bool
|
|
}
|
|
|
|
func NewGuard(whiteList []string, signingKey string, expiresAfterSec int, readSigningKey string, readExpiresAfterSec int) *Guard {
|
|
g := &Guard{
|
|
SigningKey: SigningKey(signingKey),
|
|
ExpiresAfterSec: expiresAfterSec,
|
|
ReadSigningKey: SigningKey(readSigningKey),
|
|
ReadExpiresAfterSec: readExpiresAfterSec,
|
|
}
|
|
g.UpdateWhiteList(whiteList)
|
|
return g
|
|
}
|
|
|
|
func (g *Guard) WhiteList(f http.HandlerFunc) http.HandlerFunc {
|
|
if !g.isWriteActive {
|
|
//if no security needed, just skip all checking
|
|
return f
|
|
}
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
if err := g.checkWhiteList(w, r); err != nil {
|
|
w.WriteHeader(http.StatusUnauthorized)
|
|
return
|
|
}
|
|
f(w, r)
|
|
}
|
|
}
|
|
|
|
func GetActualRemoteHost(r *http.Request) (host string, err error) {
|
|
host = r.Header.Get("HTTP_X_FORWARDED_FOR")
|
|
if host == "" {
|
|
host = r.Header.Get("X-FORWARDED-FOR")
|
|
}
|
|
if strings.Contains(host, ",") {
|
|
host = host[0:strings.Index(host, ",")]
|
|
}
|
|
if host == "" {
|
|
host, _, err = net.SplitHostPort(r.RemoteAddr)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (g *Guard) checkWhiteList(w http.ResponseWriter, r *http.Request) error {
|
|
if g.isEmptyWhiteList {
|
|
return nil
|
|
}
|
|
|
|
host, err := GetActualRemoteHost(r)
|
|
if err != nil {
|
|
return fmt.Errorf("get actual remote host %s in checkWhiteList failed: %v", r.RemoteAddr, err)
|
|
}
|
|
|
|
if _, ok := g.whiteListIp[host]; ok {
|
|
return nil
|
|
}
|
|
|
|
for _, cidrnet := range g.whiteListCIDR {
|
|
// If the whitelist entry contains a "/" it
|
|
// is a CIDR range, and we should check the
|
|
remote := net.ParseIP(host)
|
|
if cidrnet.Contains(remote) {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
glog.V(0).Infof("Not in whitelist: %s", r.RemoteAddr)
|
|
return fmt.Errorf("Not in whitelist: %s", r.RemoteAddr)
|
|
}
|
|
|
|
func (g *Guard) UpdateWhiteList(whiteList []string) {
|
|
whiteListIp := make(map[string]struct{})
|
|
whiteListCIDR := make(map[string]*net.IPNet)
|
|
for _, ip := range whiteList {
|
|
if strings.Contains(ip, "/") {
|
|
_, cidrnet, err := net.ParseCIDR(ip)
|
|
if err != nil {
|
|
glog.Errorf("Parse CIDR %s in whitelist failed: %v", ip, err)
|
|
}
|
|
whiteListCIDR[ip] = cidrnet
|
|
} else {
|
|
whiteListIp[ip] = struct{}{}
|
|
}
|
|
}
|
|
g.isEmptyWhiteList = len(whiteListIp) == 0 && len(whiteListCIDR) == 0
|
|
g.isWriteActive = !g.isEmptyWhiteList || len(g.SigningKey) != 0
|
|
g.whiteListIp = whiteListIp
|
|
g.whiteListCIDR = whiteListCIDR
|
|
}
|