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gitea/tests/integration/oauth_test.go
Denys Konovalov 7d855efb1f
Allow for PKCE flow without client secret + add docs ()
The PKCE flow according to [RFC
7636](https://datatracker.ietf.org/doc/html/rfc7636) allows for secure
authorization without the requirement to provide a client secret for the
OAuth app.

It is implemented in Gitea since  (v1.8.0), however without being
able to omit client secret.
Since  Gitea supports setting client type at OAuth app
registration.

As public clients are already forced to use PKCE since , in this
PR the client secret check is being skipped if a public client is
detected. As Gitea seems to implement PKCE authorization correctly
according to the spec, this would allow for PKCE flow without providing
a client secret.

Also add some docs for it, please check language as I'm not a native
English speaker.

Closes 
Closes 
2023-06-03 05:59:28 +02:00

422 lines
18 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package integration
import (
"bytes"
"io"
"net/http"
"testing"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/routers/web/auth"
"code.gitea.io/gitea/tests"
"github.com/stretchr/testify/assert"
)
func TestAuthorizeNoClientID(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequest(t, "GET", "/login/oauth/authorize")
ctx := loginUser(t, "user2")
resp := ctx.MakeRequest(t, req, http.StatusBadRequest)
assert.Contains(t, resp.Body.String(), "Client ID not registered")
}
func TestAuthorizeUnregisteredRedirect(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequest(t, "GET", "/login/oauth/authorize?client_id=da7da3ba-9a13-4167-856f-3899de0b0138&redirect_uri=UNREGISTERED&response_type=code&state=thestate")
ctx := loginUser(t, "user1")
resp := ctx.MakeRequest(t, req, http.StatusBadRequest)
assert.Contains(t, resp.Body.String(), "Unregistered Redirect URI")
}
func TestAuthorizeUnsupportedResponseType(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequest(t, "GET", "/login/oauth/authorize?client_id=da7da3ba-9a13-4167-856f-3899de0b0138&redirect_uri=a&response_type=UNEXPECTED&state=thestate")
ctx := loginUser(t, "user1")
resp := ctx.MakeRequest(t, req, http.StatusSeeOther)
u, err := resp.Result().Location()
assert.NoError(t, err)
assert.Equal(t, "unsupported_response_type", u.Query().Get("error"))
assert.Equal(t, "Only code response type is supported.", u.Query().Get("error_description"))
}
func TestAuthorizeUnsupportedCodeChallengeMethod(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequest(t, "GET", "/login/oauth/authorize?client_id=da7da3ba-9a13-4167-856f-3899de0b0138&redirect_uri=a&response_type=code&state=thestate&code_challenge_method=UNEXPECTED")
ctx := loginUser(t, "user1")
resp := ctx.MakeRequest(t, req, http.StatusSeeOther)
u, err := resp.Result().Location()
assert.NoError(t, err)
assert.Equal(t, "invalid_request", u.Query().Get("error"))
assert.Equal(t, "unsupported code challenge method", u.Query().Get("error_description"))
}
func TestAuthorizeLoginRedirect(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequest(t, "GET", "/login/oauth/authorize")
assert.Contains(t, MakeRequest(t, req, http.StatusSeeOther).Body.String(), "/user/login")
}
func TestAuthorizeShow(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequest(t, "GET", "/login/oauth/authorize?client_id=da7da3ba-9a13-4167-856f-3899de0b0138&redirect_uri=a&response_type=code&state=thestate")
ctx := loginUser(t, "user4")
resp := ctx.MakeRequest(t, req, http.StatusOK)
htmlDoc := NewHTMLParser(t, resp.Body)
htmlDoc.AssertElement(t, "#authorize-app", true)
htmlDoc.GetCSRF()
}
func TestAuthorizeRedirectWithExistingGrant(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequest(t, "GET", "/login/oauth/authorize?client_id=da7da3ba-9a13-4167-856f-3899de0b0138&redirect_uri=https%3A%2F%2Fexample.com%2Fxyzzy&response_type=code&state=thestate")
ctx := loginUser(t, "user1")
resp := ctx.MakeRequest(t, req, http.StatusSeeOther)
u, err := resp.Result().Location()
assert.NoError(t, err)
assert.Equal(t, "thestate", u.Query().Get("state"))
assert.Truef(t, len(u.Query().Get("code")) > 30, "authorization code '%s' should be longer then 30", u.Query().Get("code"))
u.RawQuery = ""
assert.Equal(t, "https://example.com/xyzzy", u.String())
}
func TestAuthorizePKCERequiredForPublicClient(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequest(t, "GET", "/login/oauth/authorize?client_id=ce5a1322-42a7-11ed-b878-0242ac120002&redirect_uri=http%3A%2F%2F127.0.0.1&response_type=code&state=thestate")
ctx := loginUser(t, "user1")
resp := ctx.MakeRequest(t, req, http.StatusSeeOther)
u, err := resp.Result().Location()
assert.NoError(t, err)
assert.Equal(t, "invalid_request", u.Query().Get("error"))
assert.Equal(t, "PKCE is required for public clients", u.Query().Get("error_description"))
}
func TestAccessTokenExchange(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp := MakeRequest(t, req, http.StatusOK)
type response struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
ExpiresIn int64 `json:"expires_in"`
RefreshToken string `json:"refresh_token"`
}
parsed := new(response)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsed))
assert.True(t, len(parsed.AccessToken) > 10)
assert.True(t, len(parsed.RefreshToken) > 10)
}
func TestAccessTokenExchangeWithPublicClient(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "ce5a1322-42a7-11ed-b878-0242ac120002",
"redirect_uri": "http://127.0.0.1",
"code": "authcodepublic",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp := MakeRequest(t, req, http.StatusOK)
type response struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
ExpiresIn int64 `json:"expires_in"`
RefreshToken string `json:"refresh_token"`
}
parsed := new(response)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsed))
assert.True(t, len(parsed.AccessToken) > 10)
assert.True(t, len(parsed.RefreshToken) > 10)
}
func TestAccessTokenExchangeJSON(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequestWithJSON(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp := MakeRequest(t, req, http.StatusOK)
type response struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
ExpiresIn int64 `json:"expires_in"`
RefreshToken string `json:"refresh_token"`
}
parsed := new(response)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsed))
assert.True(t, len(parsed.AccessToken) > 10)
assert.True(t, len(parsed.RefreshToken) > 10)
}
func TestAccessTokenExchangeWithoutPKCE(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"code": "authcode",
})
resp := MakeRequest(t, req, http.StatusBadRequest)
parsedError := new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
assert.Equal(t, "failed PKCE code challenge", parsedError.ErrorDescription)
}
func TestAccessTokenExchangeWithInvalidCredentials(t *testing.T) {
defer tests.PrepareTestEnv(t)()
// invalid client id
req := NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "???",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp := MakeRequest(t, req, http.StatusBadRequest)
parsedError := new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "invalid_client", string(parsedError.ErrorCode))
assert.Equal(t, "cannot load client with client id: '???'", parsedError.ErrorDescription)
// invalid client secret
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "???",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
assert.Equal(t, "invalid client secret", parsedError.ErrorDescription)
// invalid redirect uri
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "???",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
assert.Equal(t, "unexpected redirect URI", parsedError.ErrorDescription)
// invalid authorization code
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"code": "???",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
assert.Equal(t, "client is not authorized", parsedError.ErrorDescription)
// invalid grant_type
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "???",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "unsupported_grant_type", string(parsedError.ErrorCode))
assert.Equal(t, "Only refresh_token or authorization_code grant type is supported", parsedError.ErrorDescription)
}
func TestAccessTokenExchangeWithBasicAuth(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
req.Header.Add("Authorization", "Basic ZGE3ZGEzYmEtOWExMy00MTY3LTg1NmYtMzg5OWRlMGIwMTM4OjRNSzhOYTZSNTVzbWRDWTBXdUNDdW1aNmhqUlBuR1k1c2FXVlJISGpKaUE9")
resp := MakeRequest(t, req, http.StatusOK)
type response struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
ExpiresIn int64 `json:"expires_in"`
RefreshToken string `json:"refresh_token"`
}
parsed := new(response)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsed))
assert.True(t, len(parsed.AccessToken) > 10)
assert.True(t, len(parsed.RefreshToken) > 10)
// use wrong client_secret
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
req.Header.Add("Authorization", "Basic ZGE3ZGEzYmEtOWExMy00MTY3LTg1NmYtMzg5OWRlMGIwMTM4OmJsYWJsYQ==")
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError := new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
assert.Equal(t, "invalid client secret", parsedError.ErrorDescription)
// missing header
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "invalid_client", string(parsedError.ErrorCode))
assert.Equal(t, "cannot load client with client id: ''", parsedError.ErrorDescription)
// client_id inconsistent with Authorization header
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"redirect_uri": "a",
"code": "authcode",
"client_id": "inconsistent",
})
req.Header.Add("Authorization", "Basic ZGE3ZGEzYmEtOWExMy00MTY3LTg1NmYtMzg5OWRlMGIwMTM4OjRNSzhOYTZSNTVzbWRDWTBXdUNDdW1aNmhqUlBuR1k1c2FXVlJISGpKaUE9")
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "invalid_request", string(parsedError.ErrorCode))
assert.Equal(t, "client_id in request body inconsistent with Authorization header", parsedError.ErrorDescription)
// client_secret inconsistent with Authorization header
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"redirect_uri": "a",
"code": "authcode",
"client_secret": "inconsistent",
})
req.Header.Add("Authorization", "Basic ZGE3ZGEzYmEtOWExMy00MTY3LTg1NmYtMzg5OWRlMGIwMTM4OjRNSzhOYTZSNTVzbWRDWTBXdUNDdW1aNmhqUlBuR1k1c2FXVlJISGpKaUE9")
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "invalid_request", string(parsedError.ErrorCode))
assert.Equal(t, "client_secret in request body inconsistent with Authorization header", parsedError.ErrorDescription)
}
func TestRefreshTokenInvalidation(t *testing.T) {
defer tests.PrepareTestEnv(t)()
req := NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "authorization_code",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"code": "authcode",
"code_verifier": "N1Zo9-8Rfwhkt68r1r29ty8YwIraXR8eh_1Qwxg7yQXsonBt",
})
resp := MakeRequest(t, req, http.StatusOK)
type response struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
ExpiresIn int64 `json:"expires_in"`
RefreshToken string `json:"refresh_token"`
}
parsed := new(response)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsed))
// test without invalidation
setting.OAuth2.InvalidateRefreshTokens = false
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "refresh_token",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
// omit secret
"redirect_uri": "a",
"refresh_token": parsed.RefreshToken,
})
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError := new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "invalid_client", string(parsedError.ErrorCode))
assert.Equal(t, "invalid empty client secret", parsedError.ErrorDescription)
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "refresh_token",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"refresh_token": "UNEXPECTED",
})
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
assert.Equal(t, "unable to parse refresh token", parsedError.ErrorDescription)
req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
"grant_type": "refresh_token",
"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
"redirect_uri": "a",
"refresh_token": parsed.RefreshToken,
})
bs, err := io.ReadAll(req.Body)
assert.NoError(t, err)
req.Body = io.NopCloser(bytes.NewReader(bs))
MakeRequest(t, req, http.StatusOK)
req.Body = io.NopCloser(bytes.NewReader(bs))
MakeRequest(t, req, http.StatusOK)
// test with invalidation
setting.OAuth2.InvalidateRefreshTokens = true
req.Body = io.NopCloser(bytes.NewReader(bs))
MakeRequest(t, req, http.StatusOK)
// repeat request should fail
req.Body = io.NopCloser(bytes.NewReader(bs))
resp = MakeRequest(t, req, http.StatusBadRequest)
parsedError = new(auth.AccessTokenError)
assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
assert.Equal(t, "token was already used", parsedError.ErrorDescription)
}