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Fix whitelist and XFF.

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This commit is contained in:
Ludovic Fernandez 2018-04-23 16:20:05 +02:00 committed by Traefiker Bot
parent 667a0c41ed
commit edb5b3d711
8 changed files with 187 additions and 65 deletions
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2
middlewares/errorpages/error_pages.go
View file

@ -3,6 +3,7 @@ package errorpages
import (
"bufio"
"bytes"
"errors"
"fmt"
"net"
"net/http"
@ -13,7 +14,6 @@ import (
"github.com/containous/traefik/log"
"github.com/containous/traefik/middlewares"
"github.com/containous/traefik/types"
"github.com/pkg/errors"
"github.com/vulcand/oxy/forward"
"github.com/vulcand/oxy/utils"
)

15
middlewares/ip_whitelister.go
View file

@ -38,21 +38,15 @@ func NewIPWhiteLister(whiteList []string, useXForwardedFor bool) (*IPWhiteLister
}
func (wl *IPWhiteLister) handle(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
allowed, ip, err := wl.whiteLister.IsAuthorized(r)
err := wl.whiteLister.IsAuthorized(r)
if err != nil {
tracing.SetErrorAndDebugLog(r, "request %+v matched none of the white list - rejecting", r)
tracing.SetErrorAndDebugLog(r, "request %+v - rejecting: %v", r, err)
reject(w)
return
}
if allowed {
tracing.SetErrorAndDebugLog(r, "request %+v matched white list %s - passing", r, wl.whiteLister)
next.ServeHTTP(w, r)
return
}
tracing.SetErrorAndDebugLog(r, "source-IP %s matched none of the white list - rejecting", ip)
reject(w)
}
func (wl *IPWhiteLister) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
@ -63,5 +57,8 @@ func reject(w http.ResponseWriter) {
statusCode := http.StatusForbidden
w.WriteHeader(statusCode)
w.Write([]byte(http.StatusText(statusCode)))
_, err := w.Write([]byte(http.StatusText(statusCode)))
if err != nil {
log.Error(err)
}
}

7
middlewares/ip_whitelister_test.go
View file

@ -88,6 +88,13 @@ func TestIPWhiteLister_ServeHTTP(t *testing.T) {
xForwardedFor: []string{"30.30.30.30", "40.40.40.40"},
expected: 200,
},
{
desc: "authorized with only one X-Forwarded-For",
whiteList: []string{"30.30.30.30"},
useXForwardedFor: true,
xForwardedFor: []string{"30.30.30.30"},
expected: 200,
},
{
desc: "non authorized with X-Forwarded-For",
whiteList: []string{"30.30.30.30"},

23
server/header_rewriter.go
View file

@ -11,20 +11,20 @@ import (
// NewHeaderRewriter Create a header rewriter
func NewHeaderRewriter(trustedIPs []string, insecure bool) (forward.ReqRewriter, error) {
IPs, err := whitelist.NewIP(trustedIPs, insecure, true)
ips, err := whitelist.NewIP(trustedIPs, insecure, true)
if err != nil {
return nil, err
}
h, err := os.Hostname()
hostname, err := os.Hostname()
if err != nil {
h = "localhost"
hostname = "localhost"
}
return &headerRewriter{
secureRewriter: &forward.HeaderRewriter{TrustForwardHeader: true, Hostname: h},
insecureRewriter: &forward.HeaderRewriter{TrustForwardHeader: false, Hostname: h},
ips: IPs,
secureRewriter: &forward.HeaderRewriter{TrustForwardHeader: false, Hostname: hostname},
insecureRewriter: &forward.HeaderRewriter{TrustForwardHeader: true, Hostname: hostname},
ips: ips,
insecure: insecure,
}, nil
}
@ -37,16 +37,17 @@ type headerRewriter struct {
}
func (h *headerRewriter) Rewrite(req *http.Request) {
authorized, _, err := h.ips.IsAuthorized(req)
if h.insecure {
h.insecureRewriter.Rewrite(req)
return
}
err := h.ips.IsAuthorized(req)
if err != nil {
log.Error(err)
h.secureRewriter.Rewrite(req)
return
}
if h.insecure || authorized {
h.secureRewriter.Rewrite(req)
} else {
h.insecureRewriter.Rewrite(req)
}
}

104
server/header_rewriter_test.go Normal file
View file

@ -0,0 +1,104 @@
package server
import (
"net/http"
"net/http/httptest"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestHeaderRewriter_Rewrite(t *testing.T) {
testCases := []struct {
desc string
remoteAddr string
trustedIPs []string
insecure bool
expected map[string]string
}{
{
desc: "Secure & authorized",
remoteAddr: "10.10.10.10:80",
trustedIPs: []string{"10.10.10.10"},
insecure: false,
expected: map[string]string{
"X-Foo": "bar",
"X-Forwarded-For": "30.30.30.30",
},
},
{
desc: "Secure & unauthorized",
remoteAddr: "50.50.50.50:80",
trustedIPs: []string{"10.10.10.10"},
insecure: false,
expected: map[string]string{
"X-Foo": "bar",
"X-Forwarded-For": "",
},
},
{
desc: "Secure & authorized error",
remoteAddr: "10.10.10.10",
trustedIPs: []string{"10.10.10.10"},
insecure: false,
expected: map[string]string{
"X-Foo": "bar",
"X-Forwarded-For": "",
},
},
{
desc: "insecure & authorized",
remoteAddr: "10.10.10.10:80",
trustedIPs: []string{"10.10.10.10"},
insecure: true,
expected: map[string]string{
"X-Foo": "bar",
"X-Forwarded-For": "30.30.30.30",
},
},
{
desc: "insecure & unauthorized",
remoteAddr: "50.50.50.50:80",
trustedIPs: []string{"10.10.10.10"},
insecure: true,
expected: map[string]string{
"X-Foo": "bar",
"X-Forwarded-For": "30.30.30.30",
},
},
{
desc: "insecure & authorized error",
remoteAddr: "10.10.10.10",
trustedIPs: []string{"10.10.10.10"},
insecure: true,
expected: map[string]string{
"X-Foo": "bar",
"X-Forwarded-For": "30.30.30.30",
},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
rewriter, err := NewHeaderRewriter(test.trustedIPs, test.insecure)
require.NoError(t, err)
req := httptest.NewRequest(http.MethodGet, "http://20.20.20.20/foo", nil)
require.NoError(t, err)
req.RemoteAddr = test.remoteAddr
req.Header.Set("X-Foo", "bar")
req.Header.Set("X-Forwarded-For", "30.30.30.30")
rewriter.Rewrite(req)
for key, value := range test.expected {
assert.Equal(t, value, req.Header.Get(key))
}
})
}
}

3
server/server.go
View file

@ -808,7 +808,8 @@ func (s *Server) prepareServer(entryPointName string, entryPoint *configuration.
if !ok {
return false, fmt.Errorf("type error %v", addr)
}
return IPs.ContainsIP(ip.IP)
return IPs.ContainsIP(ip.IP), nil
},
}
}

52
whitelist/ip.go
View file

@ -1,11 +1,11 @@
package whitelist
import (
"errors"
"fmt"
"net"
"net/http"
"github.com/pkg/errors"
"strings"
)
const (
@ -50,64 +50,78 @@ func NewIP(whiteList []string, insecure bool, useXForwardedFor bool) (*IP, error
}
// IsAuthorized checks if provided request is authorized by the white list
func (ip *IP) IsAuthorized(req *http.Request) (bool, net.IP, error) {
func (ip *IP) IsAuthorized(req *http.Request) error {
if ip.insecure {
return true, nil, nil
return nil
}
var invalidMatches []string
if ip.useXForwardedFor {
xFFs := req.Header[XForwardedFor]
if len(xFFs) > 1 {
if len(xFFs) > 0 {
for _, xFF := range xFFs {
ok, i, err := ip.contains(parseHost(xFF))
ok, err := ip.contains(parseHost(xFF))
if err != nil {
return false, nil, err
return err
}
if ok {
return ok, i, nil
return nil
}
invalidMatches = append(invalidMatches, xFF)
}
}
}
host, _, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
return false, nil, err
return err
}
return ip.contains(host)
ok, err := ip.contains(host)
if err != nil {
return err
}
if !ok {
invalidMatches = append(invalidMatches, req.RemoteAddr)
return fmt.Errorf("%q matched none of the white list", strings.Join(invalidMatches, ", "))
}
return nil
}
// contains checks if provided address is in the white list
func (ip *IP) contains(addr string) (bool, net.IP, error) {
func (ip *IP) contains(addr string) (bool, error) {
ipAddr, err := parseIP(addr)
if err != nil {
return false, nil, fmt.Errorf("unable to parse address: %s: %s", addr, err)
return false, fmt.Errorf("unable to parse address: %s: %s", addr, err)
}
contains, err := ip.ContainsIP(ipAddr)
return contains, ipAddr, err
return ip.ContainsIP(ipAddr), nil
}
// ContainsIP checks if provided address is in the white list
func (ip *IP) ContainsIP(addr net.IP) (bool, error) {
func (ip *IP) ContainsIP(addr net.IP) bool {
if ip.insecure {
return true, nil
return true
}
for _, whiteListIP := range ip.whiteListsIPs {
if whiteListIP.Equal(addr) {
return true, nil
return true
}
}
for _, whiteListNet := range ip.whiteListsNet {
if whiteListNet.Contains(addr) {
return true, nil
return true
}
}
return false, nil
return false
}
func parseIP(addr string) (net.IP, error) {

38
whitelist/ip_test.go
View file

@ -17,7 +17,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor bool
remoteAddr string
xForwardedForValues []string
expected bool
authorized bool
}{
{
desc: "allow UseXForwardedFor, remoteAddr not in range, UseXForwardedFor in range",
@ -25,7 +25,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor: true,
remoteAddr: "10.2.3.1:123",
xForwardedForValues: []string{"1.2.3.1", "10.2.3.1"},
expected: true,
authorized: true,
},
{
desc: "allow UseXForwardedFor, remoteAddr in range, UseXForwardedFor in range",
@ -33,7 +33,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor: true,
remoteAddr: "1.2.3.1:123",
xForwardedForValues: []string{"1.2.3.1", "10.2.3.1"},
expected: true,
authorized: true,
},
{
desc: "allow UseXForwardedFor, remoteAddr in range, UseXForwardedFor not in range",
@ -41,7 +41,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor: true,
remoteAddr: "1.2.3.1:123",
xForwardedForValues: []string{"10.2.3.1", "10.2.3.1"},
expected: true,
authorized: true,
},
{
desc: "allow UseXForwardedFor, remoteAddr not in range, UseXForwardedFor not in range",
@ -49,7 +49,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor: true,
remoteAddr: "10.2.3.1:123",
xForwardedForValues: []string{"10.2.3.1", "10.2.3.1"},
expected: false,
authorized: false,
},
{
desc: "don't allow UseXForwardedFor, remoteAddr not in range, UseXForwardedFor in range",
@ -57,7 +57,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor: false,
remoteAddr: "10.2.3.1:123",
xForwardedForValues: []string{"1.2.3.1", "10.2.3.1"},
expected: false,
authorized: false,
},
{
desc: "don't allow UseXForwardedFor, remoteAddr in range, UseXForwardedFor in range",
@ -65,7 +65,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor: false,
remoteAddr: "1.2.3.1:123",
xForwardedForValues: []string{"1.2.3.1", "10.2.3.1"},
expected: true,
authorized: true,
},
{
desc: "don't allow UseXForwardedFor, remoteAddr in range, UseXForwardedFor not in range",
@ -73,7 +73,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor: false,
remoteAddr: "1.2.3.1:123",
xForwardedForValues: []string{"10.2.3.1", "10.2.3.1"},
expected: true,
authorized: true,
},
{
desc: "don't allow UseXForwardedFor, remoteAddr not in range, UseXForwardedFor not in range",
@ -81,7 +81,7 @@ func TestIsAuthorized(t *testing.T) {
allowXForwardedFor: false,
remoteAddr: "10.2.3.1:123",
xForwardedForValues: []string{"10.2.3.1", "10.2.3.1"},
expected: false,
authorized: false,
},
}
@ -95,11 +95,12 @@ func TestIsAuthorized(t *testing.T) {
whiteLister, err := NewIP(test.whiteList, false, test.allowXForwardedFor)
require.NoError(t, err)
authorized, ips, err := whiteLister.IsAuthorized(req)
err = whiteLister.IsAuthorized(req)
if test.authorized {
require.NoError(t, err)
assert.NotNil(t, ips)
assert.Equal(t, test.expected, authorized)
} else {
require.Error(t, err)
}
})
}
}
@ -349,16 +350,14 @@ func TestContainsIsAllowed(t *testing.T) {
require.NotNil(t, whiteLister)
for _, testIP := range test.passIPs {
allowed, ip, err := whiteLister.contains(testIP)
allowed, err := whiteLister.contains(testIP)
require.NoError(t, err)
require.NotNil(t, ip, err)
assert.Truef(t, allowed, "%s should have passed.", testIP)
}
for _, testIP := range test.rejectIPs {
allowed, ip, err := whiteLister.contains(testIP)
allowed, err := whiteLister.contains(testIP)
require.NoError(t, err)
require.NotNil(t, ip, err)
assert.Falsef(t, allowed, "%s should not have passed.", testIP)
}
})
@ -405,7 +404,7 @@ func TestContainsInsecure(t *testing.T) {
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
ok, _, err := test.whiteLister.contains(test.ip)
ok, err := test.whiteLister.contains(test.ip)
require.NoError(t, err)
assert.Equal(t, test.expected, ok)
@ -426,9 +425,8 @@ func TestContainsBrokenIPs(t *testing.T) {
require.NoError(t, err)
for _, testIP := range brokenIPs {
_, ip, err := whiteLister.contains(testIP)
_, err := whiteLister.contains(testIP)
assert.Error(t, err)
require.Nil(t, ip, err)
}
}