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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package utils
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/sha256"
"encoding/asn1"
"encoding/base64"
"math/big"
"net/http"
"net/http/httptest"
"net/url"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/mattermost/mattermost-server/model"
)
func TestRenderWebError(t *testing.T) {
r := httptest.NewRequest("GET", "http://foo", nil)
w := httptest.NewRecorder()
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
require.NoError(t, err)
RenderWebError(&model.Config{}, w, r, http.StatusTemporaryRedirect, url.Values{
"foo": []string{"bar"},
}, key)
resp := w.Result()
location, err := url.Parse(resp.Header.Get("Location"))
require.NoError(t, err)
require.NotEmpty(t, location.Query().Get("s"))
type ecdsaSignature struct {
R, S *big.Int
}
var rs ecdsaSignature
s, err := base64.URLEncoding.DecodeString(location.Query().Get("s"))
require.NoError(t, err)
_, err = asn1.Unmarshal(s, &rs)
require.NoError(t, err)
assert.Equal(t, "bar", location.Query().Get("foo"))
h := sha256.Sum256([]byte("/error?foo=bar"))
assert.True(t, ecdsa.Verify(&key.PublicKey, h[:], rs.R, rs.S))
}
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