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gitea/tests/integration/oauth_test.go
Denys Konovalov 7d855efb1f
Allow for PKCE flow without client secret + add docs (#25033)
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 #5378 (v1.8.0), however without being
able to omit client secret.
Since #21316 Gitea supports setting client type at OAuth app
registration.

As public clients are already forced to use PKCE since #21316, 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 #17107
Closes #25047
2023-06-03 05:59:28 +02:00

421 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)
}