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lavender/server/flow_test.go

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package server
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import (
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"bytes"
"context"
"crypto/rand"
"crypto/rsa"
"errors"
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"fmt"
"github.com/1f349/cache"
"github.com/1f349/lavender/issuer"
"github.com/1f349/lavender/server/pages"
"github.com/1f349/lavender/utils"
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"github.com/1f349/mjwt"
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"github.com/google/uuid"
"github.com/julienschmidt/httprouter"
"github.com/stretchr/testify/assert"
"golang.org/x/oauth2"
"net/http"
"net/http/httptest"
"net/url"
"strings"
"testing"
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"time"
"unicode"
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)
const lavenderDomain = "http://localhost:0"
const clientAppDomain = "http://localhost:1"
const loginDomain = "http://localhost:2"
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var clientAppMeta AllowedClient
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var testSigner mjwt.Signer
var testOidc = &issuer.WellKnownOIDC{
Config: issuer.SsoConfig{
Addr: utils.JsonUrl{},
Namespace: "example.com",
Client: issuer.SsoConfigClient{
ID: "test-id",
Secret: "test-secret",
Scopes: []string{"openid"},
},
},
Issuer: "https://example.com",
AuthorizationEndpoint: loginDomain + "/authorize",
TokenEndpoint: loginDomain + "/token",
UserInfoEndpoint: loginDomain + "/userinfo",
ResponseTypesSupported: nil,
ScopesSupported: nil,
ClaimsSupported: nil,
GrantTypesSupported: nil,
OAuth2Config: oauth2.Config{
ClientID: "test-id",
ClientSecret: "test-secret",
Endpoint: oauth2.Endpoint{
AuthURL: loginDomain + "/authorize",
TokenURL: loginDomain + "/token",
AuthStyle: oauth2.AuthStyleInHeader,
},
Scopes: nil,
},
}
var testManager = issuer.NewManagerForTests([]*issuer.WellKnownOIDC{testOidc})
var testHttpServer = HttpServer{
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r: nil,
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flowState: cache.New[string, flowStateData](),
}
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func init() {
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testHttpServer.conf.Store(&Conf{
BaseUrl: lavenderDomain,
ServiceName: "Test Lavender Service",
})
testHttpServer.manager.Store(testManager)
testHttpServer.services.Store(&map[string]AllowedClient{
clientAppDomain: {},
})
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err := pages.LoadPages("")
if err != nil {
panic(err)
}
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key, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
panic(err)
}
testSigner = mjwt.NewMJwtSigner("https://example.com", key)
testHttpServer.signer = testSigner
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parse, err := url.Parse(clientAppDomain)
if err != nil {
panic(err)
}
clientAppMeta = AllowedClient{
Url: utils.JsonUrl{URL: parse},
Permissions: []string{"test-perm"},
}
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}
func TestFlowPopup(t *testing.T) {
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h := HttpServer{}
h.conf.Store(&Conf{ServiceName: "Test Service Name"})
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rec := httptest.NewRecorder()
req := httptest.NewRequest(http.MethodGet, "/popup?"+url.Values{"origin": []string{clientAppDomain}}.Encode(), nil)
h.flowPopup(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusOK, rec.Code)
assert.Equal(t, fmt.Sprintf(`<!DOCTYPE html>
<html lang="en">
<head>
<title>Test Service Name</title>
</head>
<body>
<header>
<h1>Test Service Name</h1>
</header>
<main>
<form method="POST" action="/popup">
<input type="hidden" name="origin" value="%s"/>
<div>
<label for="field_loginname">Login Name:</label>
<input type="text" name="loginname" id="field_loginname" required/>
</div>
<button type="submit">Continue</button>
</form>
</main>
</body>
</html>
`, clientAppDomain), rec.Body.String())
}
func TestFlowPopupPost(t *testing.T) {
// test no login service error
rec := httptest.NewRecorder()
req := httptest.NewRequest(http.MethodPost, "/popup", strings.NewReader(url.Values{
"loginname": []string{"test@missing.example.com"},
"origin": []string{clientAppDomain},
}.Encode()))
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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testHttpServer.flowPopupPost(rec, req, httprouter.Params{})
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assert.Equal(t, http.StatusBadRequest, rec.Code)
assert.Equal(t, "No login service defined for this username\n", rec.Body.String())
// test invalid target origin error
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodPost, "/popup", strings.NewReader(url.Values{
"loginname": []string{"test@example.com"},
"origin": []string{"http://localhost:1010"},
}.Encode()))
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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testHttpServer.flowPopupPost(rec, req, httprouter.Params{})
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assert.Equal(t, http.StatusBadRequest, rec.Code)
assert.Equal(t, "Invalid target origin\n", rec.Body.String())
// test successful request
nextState := uuid.NewString()
uuidNewStringState = func() string { return nextState }
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodPost, "/popup", strings.NewReader(url.Values{
"loginname": []string{"test@example.com"},
"origin": []string{clientAppDomain},
}.Encode()))
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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testHttpServer.flowPopupPost(rec, req, httprouter.Params{})
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assert.Equal(t, http.StatusFound, rec.Code)
assert.Equal(t, "", rec.Body.String())
assert.Equal(t, loginDomain+"/authorize?"+url.Values{
"client_id": []string{"test-id"},
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"login_name": []string{"test"},
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"redirect_uri": []string{lavenderDomain + "/callback"},
"response_type": []string{"code"},
"state": []string{"example.com:" + nextState},
}.Encode(), rec.Header().Get("Location"))
}
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func TestFlowCallback(t *testing.T) {
expiryTime := time.Now().Add(15 * time.Minute)
nextState := uuid.NewString()
testHttpServer.flowState.Set("example.com:"+nextState, flowStateData{
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sso: testOidc,
target: clientAppMeta,
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}, expiryTime)
testOa2Exchange = func(oa2conf oauth2.Config, ctx context.Context, code string) (*oauth2.Token, error) {
return nil, errors.New("no exchange should be made")
}
testOa2UserInfo = func(oidc *issuer.WellKnownOIDC, ctx context.Context, exchange *oauth2.Token) (*http.Response, error) {
return nil, errors.New("no userinfo should be fetched")
}
// test parse form error
rec := httptest.NewRecorder()
req := httptest.NewRequest(http.MethodGet, "/callback?%+"+url.Values{
"state": []string{"example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusBadRequest, rec.Code)
assert.Equal(t, "Error parsing form\n", rec.Body.String())
// test invalid namespace
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"missing.example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusBadRequest, rec.Code)
assert.Equal(t, "Invalid state namespace\n", rec.Body.String())
// test invalid state
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"example.com:invalid"},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusBadRequest, rec.Code)
assert.Equal(t, "Invalid state\n", rec.Body.String())
// test failed exchange
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusInternalServerError, rec.Code)
assert.Equal(t, "Failed to exchange code\n", rec.Body.String())
testOa2Exchange = func(oa2conf oauth2.Config, ctx context.Context, code string) (*oauth2.Token, error) {
return &oauth2.Token{
AccessToken: "abcd1234",
TokenType: "",
RefreshToken: "efgh5678",
Expiry: expiryTime,
}, nil
}
// test failed userinfo
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusInternalServerError, rec.Code)
assert.Equal(t, "Failed to get userinfo\n", rec.Body.String())
testOa2UserInfo = func(oidc *issuer.WellKnownOIDC, ctx context.Context, exchange *oauth2.Token) (*http.Response, error) {
rec := httptest.NewRecorder()
rec.WriteHeader(http.StatusInternalServerError)
return rec.Result(), nil
}
// test failed userinfo status code
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusInternalServerError, rec.Code)
assert.Equal(t, "Failed to get userinfo: unexpected status code\n", rec.Body.String())
testOa2UserInfo = func(oidc *issuer.WellKnownOIDC, ctx context.Context, exchange *oauth2.Token) (*http.Response, error) {
rec := httptest.NewRecorder()
rec.WriteHeader(http.StatusOK)
_, _ = rec.Body.WriteString("{")
return rec.Result(), nil
}
// test failed userinfo decode
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusInternalServerError, rec.Code)
assert.Equal(t, "Failed to decode userinfo\n", rec.Body.String())
testOa2UserInfo = func(oidc *issuer.WellKnownOIDC, ctx context.Context, exchange *oauth2.Token) (*http.Response, error) {
rec := httptest.NewRecorder()
rec.WriteHeader(http.StatusOK)
_, _ = rec.Body.WriteString("{\"sub\":1}")
return rec.Result(), nil
}
// test invalid subject in userinfo
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusInternalServerError, rec.Code)
assert.Equal(t, "Invalid subject in userinfo\n", rec.Body.String())
testOa2UserInfo = func(oidc *issuer.WellKnownOIDC, ctx context.Context, exchange *oauth2.Token) (*http.Response, error) {
rec := httptest.NewRecorder()
rec.WriteHeader(http.StatusOK)
_, _ = rec.Body.WriteString("{\"sub\":\"1\",\"aud\":1}")
return rec.Result(), nil
}
// test invalid audience in userinfo
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusInternalServerError, rec.Code)
assert.Equal(t, "Invalid audience in userinfo\n", rec.Body.String())
testOa2UserInfo = func(oidc *issuer.WellKnownOIDC, ctx context.Context, exchange *oauth2.Token) (*http.Response, error) {
rec := httptest.NewRecorder()
rec.WriteHeader(http.StatusOK)
_, _ = rec.Body.WriteString(fmt.Sprintf(`{
"sub": "test-user",
"aud": "%s",
"test-field": "ok"
}
`, clientAppDomain))
return rec.Result(), nil
}
// test successful request
rec = httptest.NewRecorder()
req = httptest.NewRequest(http.MethodGet, "/callback?"+url.Values{
"state": []string{"example.com:" + nextState},
"origin": []string{clientAppDomain},
}.Encode(), nil)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
testHttpServer.flowCallback(rec, req, httprouter.Params{})
assert.Equal(t, http.StatusOK, rec.Code)
const p1 = `<!DOCTYPE html>
<html lang="en">
<head>
<title>Test Lavender Service</title>
<script>
let loginData = {
target:"%s",
tokens: `
const p2 = `,
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userinfo:{"aud":"%s","sub":"test-user","test-field":"ok"},
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};
window.addEventListener("load", function () {
window.opener.postMessage(loginData, loginData.target);
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setTimeout(function () {
window.close();
}, 500);
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});
</script>
</head>
<body>
<header>
<h1>Test Lavender Service</h1>
</header>
<main id="mainBody">Loading...</main>
</body>
</html>
`
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var p1v = fmt.Sprintf(p1, clientAppDomain)
var p2v = fmt.Sprintf(p2, clientAppDomain)
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a := make([]byte, len(p1v))
n, err := rec.Body.Read(a)
assert.NoError(t, err)
assert.Equal(t, len(p1v), n)
assert.Equal(t, p1v, string(a))
var accessToken, refreshToken string
findByte(rec.Body, '{')
findString(rec.Body, "access:")
readQuotedString(rec.Body, &accessToken)
findByte(rec.Body, ',')
findString(rec.Body, "refresh:")
readQuotedString(rec.Body, &refreshToken)
findByte(rec.Body, ',')
findByte(rec.Body, '}')
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assert.Equal(t, p2v, rec.Body.String())
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}
func findByte(buf *bytes.Buffer, v byte) {
for {
readByte, err := buf.ReadByte()
if err != nil {
panic(err)
}
if readByte == v {
break
}
if !unicode.IsSpace(rune(readByte)) {
panic(fmt.Sprint("Found non space rune: ", readByte))
}
}
}
func findString(buf *bytes.Buffer, v string) {
if len(v) == 0 {
panic("Cannot find empty string")
}
findByte(buf, v[0])
if len(v) > 1 {
a2 := make([]byte, len(v)-1)
n, err := buf.Read(a2)
if err != nil {
panic(err)
}
if n != len(a2) {
panic("Probably found end of buffer")
}
if bytes.Compare([]byte(v[1:]), a2) != 0 {
panic("Failed to find string in buffer")
}
}
}
func readQuotedString(buf *bytes.Buffer, p *string) {
findByte(buf, '"')
b, err := buf.ReadBytes('"')
if err != nil {
panic(err)
}
*p = string(b)
}
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