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hsts_test.go
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hsts_test.go
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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package hsts_test
import (
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/google/go-safeweb/safehttp"
"github.com/google/go-safeweb/safehttp/plugins/hsts"
"github.com/google/go-safeweb/safehttp/safehttptest"
)
func TestHSTSReject(t *testing.T) {
var test = []struct {
name string
interceptor hsts.Interceptor
req *safehttp.IncomingRequest
wantStatus safehttp.StatusCode
wantBody string
wantRedirect string
}{
{
name: "HTTP",
interceptor: hsts.Default(),
req: safehttptest.NewRequest(safehttp.MethodGet, "http://localhost/", nil),
wantStatus: safehttp.StatusMovedPermanently,
wantRedirect: "https://localhost/",
},
{
name: "Negative MaxAge",
interceptor: hsts.Interceptor{MaxAge: -1 * time.Second},
req: safehttptest.NewRequest(safehttp.MethodGet, "https://localhost/", nil),
wantStatus: safehttp.StatusInternalServerError,
},
}
for _, tt := range test {
t.Run(tt.name, func(t *testing.T) {
fakeRW, rr := safehttptest.NewFakeResponseWriter()
tt.interceptor.Before(fakeRW, tt.req, nil)
if gotStatus := rr.Code; gotStatus != int(tt.wantStatus) {
t.Errorf("rr.Code got: %v want: %v", gotStatus, tt.wantStatus)
}
if tt.wantRedirect != "" {
resp := fakeRW.Dispatcher.Written
redir, ok := resp.(safehttp.RedirectResponse)
if !ok {
t.Fatalf("got %T, wanted a RedirectResponse", resp)
}
if got, want := redir.Location, tt.wantRedirect; got != want {
t.Errorf("RedirectResponse.Location got %q, want %q", got, want)
}
}
})
}
}
func TestHSTSOK(t *testing.T) {
var test = []struct {
name string
interceptor hsts.Interceptor
req *safehttp.IncomingRequest
wantHeaders map[string][]string
wantRedirect string
}{
{
name: "HTTPS",
interceptor: hsts.Default(),
req: safehttptest.NewRequest(safehttp.MethodGet, "https://localhost/", nil),
wantHeaders: map[string][]string{
"Strict-Transport-Security": {"max-age=63072000; includeSubDomains"}, // 63072000 seconds is two years
},
},
{
name: "HTTP behind proxy",
interceptor: hsts.Interceptor{BehindProxy: true},
req: safehttptest.NewRequest(safehttp.MethodGet, "http://localhost/", nil),
wantHeaders: map[string][]string{
// max-age=0 tells the browser to expire the HSTS protection.
"Strict-Transport-Security": {"max-age=0; includeSubDomains"},
},
},
{
name: "Preload",
interceptor: hsts.Interceptor{Preload: true, DisableIncludeSubDomains: true},
req: safehttptest.NewRequest(safehttp.MethodGet, "https://localhost/", nil),
wantHeaders: map[string][]string{
// max-age=0 tells the browser to expire the HSTS protection.
"Strict-Transport-Security": {"max-age=0; preload"},
},
},
{
name: "Preload and IncludeSubDomains",
interceptor: hsts.Interceptor{Preload: true},
req: safehttptest.NewRequest(safehttp.MethodGet, "https://localhost/", nil),
wantHeaders: map[string][]string{
// max-age=0 tells the browser to expire the HSTS protection.
"Strict-Transport-Security": {"max-age=0; includeSubDomains; preload"},
},
},
{
name: "No preload and no includeSubDomains",
interceptor: hsts.Interceptor{DisableIncludeSubDomains: true},
req: safehttptest.NewRequest(safehttp.MethodGet, "https://localhost/", nil),
wantHeaders: map[string][]string{
// max-age=0 tells the browser to expire the HSTS protection.
"Strict-Transport-Security": {"max-age=0"},
},
},
{
name: "Custom MaxAge",
interceptor: hsts.Interceptor{MaxAge: 3600 * time.Second},
req: safehttptest.NewRequest(safehttp.MethodGet, "https://localhost/", nil),
wantHeaders: map[string][]string{
"Strict-Transport-Security": {"max-age=3600; includeSubDomains"}, // 3600 seconds is 1 hour
},
},
}
for _, tt := range test {
t.Run(tt.name, func(t *testing.T) {
fakeRW, rr := safehttptest.NewFakeResponseWriter()
tt.interceptor.Before(fakeRW, tt.req, nil)
if gotStatus := rr.Code; gotStatus != int(safehttp.StatusOK) {
t.Errorf("rr.Code got: %v want: %v", gotStatus, safehttp.StatusOK)
}
if diff := cmp.Diff(tt.wantHeaders, map[string][]string(rr.Header())); diff != "" {
t.Errorf("rr.Header() mismatch (-want +got):\n%s", diff)
}
})
}
}