1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
/*
* Copyright (C) by Olivier Goffart <ogoffart@woboq.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <QDesktopServices>
#include <QNetworkReply>
#include <QTimer>
#include <QBuffer>
#include "account.h"
#include "creds/oauth.h"
#include <QJsonObject>
#include <QJsonDocument>
#include "theme.h"
#include "networkjobs.h"
#include "creds/httpcredentials.h"
#include <QRandomGenerator>
namespace OCC {
Q_LOGGING_CATEGORY(lcOauth, "sync.credentials.oauth", QtInfoMsg)
OAuth::~OAuth()
{
}
static void httpReplyAndClose(QTcpSocket *socket, const char *code, const char *html,
const char *moreHeaders = nullptr)
{
if (!socket)
return; // socket can have been deleted if the browser was closed
socket->write("HTTP/1.1 ");
socket->write(code);
socket->write("\r\nContent-Type: text/html; charset=utf-8\r\nConnection: close\r\nContent-Length: ");
socket->write(QByteArray::number(qstrlen(html)));
if (moreHeaders) {
socket->write("\r\n");
socket->write(moreHeaders);
}
socket->write("\r\n\r\n");
socket->write(html);
socket->disconnectFromHost();
// We don't want that deleting the server too early prevent queued data to be sent on this socket.
// The socket will be deleted after disconnection because disconnected is connected to deleteLater
socket->setParent(nullptr);
}
void OAuth::start()
{
// Listen on the socket to get a port which will be used in the redirect_uri
if (!_server.listen(QHostAddress::LocalHost)) {
emit result(NotSupported, QString());
return;
}
quint32 buffer[24];
QRandomGenerator::global()->fillRange(buffer);
_pkceCodeVerifier = QByteArray(reinterpret_cast<char*>(buffer), sizeof(buffer)).toBase64(QByteArray::Base64UrlEncoding);
Q_ASSERT(_pkceCodeVerifier.size() == 128);
fetchWellKnown();
openBrowser();
QObject::connect(&_server, &QTcpServer::newConnection, this, [this] {
while (QPointer<QTcpSocket> socket = _server.nextPendingConnection()) {
QObject::connect(socket.data(), &QTcpSocket::disconnected, socket.data(), &QTcpSocket::deleteLater);
QObject::connect(socket.data(), &QIODevice::readyRead, this, [this, socket] {
QByteArray peek = socket->peek(qMin(socket->bytesAvailable(), 4000LL)); //The code should always be within the first 4K
if (peek.indexOf('\n') < 0)
return; // wait until we find a \n
QRegExp rx("^GET /\\?code=([a-zA-Z0-9_-]+)[& ]"); // Match a /?code=... URL
if (rx.indexIn(peek) != 0) {
httpReplyAndClose(socket, "404 Not Found", "<html><head><title>404 Not Found</title></head><body><center><h1>404 Not Found</h1></center></body></html>");
return;
}
QString code = rx.cap(1); // The 'code' is the first capture of the regexp
QUrl requestToken = _tokenEndpoint.isValid()
? _tokenEndpoint
: Utility::concatUrlPath(_account->url(), QLatin1String("/index.php/apps/oauth2/api/v1/token"));
QNetworkRequest req;
req.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
QString basicAuth = QString("%1:%2").arg(
Theme::instance()->oauthClientId(), Theme::instance()->oauthClientSecret());
req.setRawHeader("Authorization", "Basic " + basicAuth.toUtf8().toBase64());
// We just added the Authorization header, don't let HttpCredentialsAccessManager tamper with it
req.setAttribute(HttpCredentials::DontAddCredentialsAttribute, true);
auto requestBody = new QBuffer;
QUrlQuery arguments;
arguments.setQueryItems({ { QStringLiteral("grant_type"), "authorization_code" },
{ QStringLiteral("code"), code },
{ QStringLiteral("redirect_uri"), QStringLiteral("http://localhost:%1").arg(_server.serverPort()) },
{ QStringLiteral("code_verifier"), _pkceCodeVerifier },
{ QStringLiteral("scope"), QStringLiteral("openid offline_access") } });
requestBody->setData(arguments.query(QUrl::FullyEncoded).toLatin1());
auto job = _account->sendRequest("POST", requestToken, req, requestBody);
job->setTimeout(qMin(30 * 1000ll, job->timeoutMsec()));
QObject::connect(job, &SimpleNetworkJob::finishedSignal, this, [this, socket](QNetworkReply *reply) {
auto jsonData = reply->readAll();
QJsonParseError jsonParseError;
QJsonObject json = QJsonDocument::fromJson(jsonData, &jsonParseError).object();
QString accessToken = json["access_token"].toString();
QString refreshToken = json["refresh_token"].toString();
QString user = json["user_id"].toString();
QUrl messageUrl = json["message_url"].toString();
if (reply->error() != QNetworkReply::NoError || jsonParseError.error != QJsonParseError::NoError
|| jsonData.isEmpty() || json.isEmpty() || refreshToken.isEmpty() || accessToken.isEmpty()
|| json["token_type"].toString() != QLatin1String("Bearer")) {
QString errorReason;
QString errorFromJson = json["error_description"].toString();
if (errorFromJson.isEmpty())
errorFromJson = json["error"].toString();
if (!errorFromJson.isEmpty()) {
errorReason = tr("Error returned from the server: <em>%1</em>")
.arg(errorFromJson.toHtmlEscaped());
} else if (reply->error() != QNetworkReply::NoError) {
errorReason = tr("There was an error accessing the 'token' endpoint: <br><em>%1</em>")
.arg(reply->errorString().toHtmlEscaped());
} else if (jsonData.isEmpty()) {
// Can happen if a funky load balancer strips away POST data, e.g. BigIP APM my.policy
errorReason = tr("Empty JSON from OAuth2 redirect");
// We explicitly have this as error case since the json qcWarning output below is misleading,
// it will show a fake json will null values that actually never was received like this as
// soon as you access json["whatever"] the debug output json will claim to have "whatever":null
} else if (jsonParseError.error != QJsonParseError::NoError) {
errorReason = tr("Could not parse the JSON returned from the server: <br><em>%1</em>")
.arg(jsonParseError.errorString());
} else {
errorReason = tr("The reply from the server did not contain all expected fields");
}
qCWarning(lcOauth) << "Error when getting the accessToken" << jsonData << errorReason;
httpReplyAndClose(socket, "500 Internal Server Error",
tr("<h1>Login Error</h1><p>%1</p>").arg(errorReason).toUtf8().constData());
emit result(Error);
return;
}
if (!user.isEmpty()) {
finalize(socket, accessToken, refreshToken, user, messageUrl);
return;
}
// If the reply don't contains the user id, we must do another call to query it
JsonApiJob *job = new JsonApiJob(_account->sharedFromThis(), QLatin1String("ocs/v1.php/cloud/user"), this);
job->setTimeout(qMin(30 * 1000ll, job->timeoutMsec()));
QNetworkRequest req;
// We are not connected yet so we need to handle the authentication manually
req.setRawHeader("Authorization", "Bearer " + accessToken.toUtf8());
// We just added the Authorization header, don't let HttpCredentialsAccessManager tamper with it
req.setAttribute(HttpCredentials::DontAddCredentialsAttribute, true);
job->startWithRequest(req);
QObject::connect(job, &JsonApiJob::jsonReceived, this, [=](const QJsonDocument &json) {
QString user = json.object().value("ocs").toObject().value("data").toObject().value("id").toString();
finalize(socket, accessToken, refreshToken, user, messageUrl);
});
});
});
}
});
}
void OAuth::finalize(QPointer<QTcpSocket> socket, const QString &accessToken,
const QString &refreshToken, const QString &user, const QUrl &messageUrl) {
if (!_expectedUser.isNull() && user != _expectedUser) {
// Connected with the wrong user
QString message = tr("<h1>Wrong user</h1>"
"<p>You logged-in with user <em>%1</em>, but must login with user <em>%2</em>.<br>"
"Please log out of %3 in another tab, then <a href='%4'>click here</a> "
"and log in as user %2</p>")
.arg(user, _expectedUser, Theme::instance()->appNameGUI(),
authorisationLink().toString(QUrl::FullyEncoded));
httpReplyAndClose(socket, "200 OK", message.toUtf8().constData());
// We are still listening on the socket so we will get the new connection
return;
}
const char *loginSuccessfullHtml = "<h1>Login Successful</h1><p>You can close this window.</p>";
if (messageUrl.isValid()) {
httpReplyAndClose(socket, "303 See Other", loginSuccessfullHtml,
QByteArray("Location: " + messageUrl.toEncoded()).constData());
} else {
httpReplyAndClose(socket, "200 OK", loginSuccessfullHtml);
}
emit result(LoggedIn, user, accessToken, refreshToken);
}
QUrl OAuth::authorisationLink() const
{
Q_ASSERT(_server.isListening());
QUrlQuery query;
QByteArray code_challenge = QCryptographicHash::hash(_pkceCodeVerifier, QCryptographicHash::Sha256)
.toBase64(QByteArray::Base64UrlEncoding | QByteArray::OmitTrailingEquals);
query.setQueryItems({ { QLatin1String("response_type"), QLatin1String("code") },
{ QLatin1String("client_id"), Theme::instance()->oauthClientId() },
{ QLatin1String("redirect_uri"), QLatin1String("http://localhost:") + QString::number(_server.serverPort()) },
{ QLatin1String("code_challenge"), QString::fromLatin1(code_challenge) },
{ QLatin1String("code_challenge_method"), QLatin1String("S256")},
{ QLatin1String("scope"), QLatin1String("openid offline_access") },
{ QLatin1String("prompt"), QLatin1String("consent")}
});
if (!_expectedUser.isNull())
query.addQueryItem("user", _expectedUser);
QUrl url = _authEndpoint.isValid()
? Utility::concatUrlPath(_authEndpoint, {}, query)
: Utility::concatUrlPath(_account->url(), QLatin1String("/index.php/apps/oauth2/authorize"), query);
return url;
}
void OAuth::authorisationLinkAsync(std::function<void (const QUrl &)> callback) const
{
if (_wellKnownFinished) {
callback(authorisationLink());
} else {
connect(this, &OAuth::authorisationLinkChanged, callback);
}
}
void OAuth::fetchWellKnown()
{
QUrl wellKnownUrl = Utility::concatUrlPath(_account->url().toString(), QLatin1String("/.well-known/openid-configuration"));
QNetworkRequest req;
auto job = _account->sendRequest("GET", wellKnownUrl);
job->setTimeout(qMin(30 * 1000ll, job->timeoutMsec()));
QObject::connect(job, &SimpleNetworkJob::finishedSignal, this, [this](QNetworkReply *reply) {
_wellKnownFinished = true;
if (reply->error() != QNetworkReply::NoError) {
// Most likely the file does not exist, default to the normal endpoint
emit this->authorisationLinkChanged(authorisationLink());
return;
}
auto jsonData = reply->readAll();
QJsonParseError jsonParseError;
QJsonObject json = QJsonDocument::fromJson(jsonData, &jsonParseError).object();
if (jsonParseError.error == QJsonParseError::NoError) {
QString authEp = json["authorization_endpoint"].toString();
if (!authEp.isEmpty())
this->_authEndpoint = authEp;
QString tokenEp = json["token_endpoint"].toString();
if (!tokenEp.isEmpty())
this->_tokenEndpoint = tokenEp;
} else {
qCWarning(lcOauth) << "Json parse error in well-known: " << jsonParseError.errorString();
}
emit this->authorisationLinkChanged(authorisationLink());
});
}
void OAuth::openBrowser()
{
authorisationLinkAsync([this](const QUrl &link) {
if (!QDesktopServices::openUrl(link)) {
qCWarning(lcOauth) << "QDesktopServices::openUrl Failed";
// We cannot open the browser, then we claim we don't support OAuth.
emit result(NotSupported, QString());
}
});
}
} // namespace OCC
|