You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
127 lines
2.9 KiB
127 lines
2.9 KiB
package security
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
"strings"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
)
|
|
|
|
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 {
|
|
whiteList []string
|
|
SigningKey SigningKey
|
|
ExpiresAfterSec int
|
|
ReadSigningKey SigningKey
|
|
ReadExpiresAfterSec int
|
|
|
|
isWriteActive bool
|
|
}
|
|
|
|
func NewGuard(whiteList []string, signingKey string, expiresAfterSec int, readSigningKey string, readExpiresAfterSec int) *Guard {
|
|
g := &Guard{
|
|
whiteList: whiteList,
|
|
SigningKey: SigningKey(signingKey),
|
|
ExpiresAfterSec: expiresAfterSec,
|
|
ReadSigningKey: SigningKey(readSigningKey),
|
|
ReadExpiresAfterSec: readExpiresAfterSec,
|
|
}
|
|
g.isWriteActive = len(g.whiteList) != 0 || len(g.SigningKey) != 0
|
|
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 len(g.whiteList) == 0 {
|
|
return nil
|
|
}
|
|
|
|
host, err := GetActualRemoteHost(r)
|
|
if err == nil {
|
|
for _, ip := range g.whiteList {
|
|
|
|
// If the whitelist entry contains a "/" it
|
|
// is a CIDR range, and we should check the
|
|
// remote host is within it
|
|
if strings.Contains(ip, "/") {
|
|
_, cidrnet, err := net.ParseCIDR(ip)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
remote := net.ParseIP(host)
|
|
if cidrnet.Contains(remote) {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
//
|
|
// Otherwise we're looking for a literal match.
|
|
//
|
|
if ip == host {
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
glog.V(0).Infof("Not in whitelist: %s", r.RemoteAddr)
|
|
return fmt.Errorf("Not in whitelist: %s", r.RemoteAddr)
|
|
}
|